fzus61 kbuf 100201
glflo 
expires:202609100900;;663487

open lake forecast for lake ontario
national weather service buffalo ny
1001 pm edt wed sep 9 2026

for waters beyond five nautical miles of shore on lake ontario

waves are the significant wave height - the average of the highest
1/3 of the wave spectrum. occasional wave height is the average of
the highest 1/10 of the wave spectrum.

.synopsis...a cold front sweeps eastward across lake ontario late 
this evening through early thursday morning. behind the front, a 
high pressure ridge averaging 30.0 inches builds from the western 
great lakes through friday and then exits toward new england on 
saturday. a warm front should sweep northeastward across lake 
ontario saturday night and be followed by a cold front sweeping 
eastward across the lake later on sunday. behind the cold front, a 
30.1 inch ridge should slide eastward across the lake through monday.


loz062-100900-
lake ontario open waters from the niagara river to hamlin beach-
1001 pm edt wed sep 9 2026

.overnight...southwest winds 15 to 20 knots becoming west.
waves 3 to 5 feet subsiding to 2 to 4 feet. 
.thursday...west winds 10 to 15 knots. waves 2 to 4 feet. 
.thursday night...northwest winds 15 to 20 knots diminishing to
10 to 15 knots. waves 2 to 4 feet subsiding to 1 to 3 feet. 
.friday...northwest winds 10 knots or less becoming southwest.
waves 2 feet or less. 
.friday night...southwest winds 10 knots or less becoming south.
waves 1 foot or less. 
.saturday...south winds 10 knots or less becoming southwest.
waves 1 foot or less. 
.sunday...west winds 5 to 15 knots becoming northwest. waves
1 foot or less. 
.monday...north winds 5 to 15 knots becoming south. waves 1 to
3 feet. 

$$

fzus61 kbuf 100201
glflo 
expires:202609100900;;663488

open lake forecast for lake ontario
national weather service buffalo ny
1001 pm edt wed sep 9 2026

for waters beyond five nautical miles of shore on lake ontario

waves are the significant wave height - the average of the highest
1/3 of the wave spectrum. occasional wave height is the average of
the highest 1/10 of the wave spectrum.

.synopsis...a cold front sweeps eastward across lake ontario late 
this evening through early thursday morning. behind the front, a 
high pressure ridge averaging 30.0 inches builds from the western 
great lakes through friday and then exits toward new england on 
saturday. a warm front should sweep northeastward across lake 
ontario saturday night and be followed by a cold front sweeping 
eastward across the lake later on sunday. behind the cold front, a 
30.1 inch ridge should slide eastward across the lake through monday.


loz063>065-100900-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1001 pm edt wed sep 9 2026

.overnight...southwest winds 15 to 20 knots becoming west.
a chance of showers. waves 3 to 5 feet. 
.thursday...west winds 15 to 20 knots. waves 3 to 6 feet. 
.thursday night...northwest winds 15 to 20 knots diminishing to
5 to 15 knots. waves 3 to 6 feet subsiding to 2 to 4 feet. 
.friday...northwest winds 10 knots or less becoming west. waves
2 feet or less. 
.friday night...west winds 5 to 10 knots becoming south. waves
1 foot or less. 
.saturday...south winds 10 to 15 knots increasing to 15 to
20 knots. waves 1 to 3 feet. 
.sunday...southwest winds 10 to 15 knots becoming northwest.
waves 1 to 3 feet. 
.monday...north winds 5 to 10 knots becoming south and increasing
to 15 to 20 knots. waves 1 to 3 feet. 

$$

fzus61 kcle 100740
glfle 
expires:202609101415;;676501

open lake forecast for lake erie
national weather service cleveland oh
340 am edt thu sep 10 2026

for waters beyond five nautical miles of shore on lake erie

waves are the significant wave height - the average of the highest
1/3 of the wave spectrum. occasional wave height is the average of
the highest 1/10 of the wave spectrum.

.synopsis...
a frontal boundary will settle south of the lake today. high 
pressure 30.00 inches will build over the great lakes region tonight 
and continue to influence the region through friday. a warm front 
will cross the lake on friday night into saturday. a cold front will 
attempt to cross the lake on sunday.


lez061-168-169-101415-
ripley to buffalo ny extending from 5nm off shoreline to us-
canadian border-geneva-on-the-
lake to conneaut oh beyond 5 nm off shoreline to us-
canadian border-
conneaut oh to ripley ny beyond 5 nm off shoreline to us-
canadian border-
340 am edt thu sep 10 2026

.today...west winds 5 to 15 knots. waves 2 to 4 feet subsiding to
1 to 2 feet. 
.tonight...northwest winds 5 to 15 knots becoming northeast.
waves 2 feet or less. 
.friday...north winds 10 knots or less becoming east. waves
1 foot or less. 
.friday night...east winds 5 to 10 knots becoming southeast.
waves 1 foot or less. 
.saturday...south winds 5 to 10 knots becoming southwest. waves
2 feet or less. 
.sunday...west winds 5 to 10 knots becoming northeast. waves 1 to
2 feet. 
.monday...northeast winds 5 to 15 knots becoming south 15 to
20 knots. waves 1 to 3 feet. 

$$

fzus61 kcle 100740
glfle 
expires:202609101415;;676499

open lake forecast for lake erie
national weather service cleveland oh
340 am edt thu sep 10 2026

for waters beyond five nautical miles of shore on lake erie

waves are the significant wave height - the average of the highest
1/3 of the wave spectrum. occasional wave height is the average of
the highest 1/10 of the wave spectrum.

.synopsis...
a frontal boundary will settle south of the lake today. high 
pressure 30.00 inches will build over the great lakes region tonight 
and continue to influence the region through friday. a warm front 
will cross the lake on friday night into saturday. a cold front will 
attempt to cross the lake on sunday.


lez162-163-101415-
detroit river lt. to maumee bay oh to reno beach oh beyond 5nm
offshoreline to us-canadian border-
reno beach to the islands oh beyond 5nm off shoreline to us-
canadian border-
340 am edt thu sep 10 2026

.today...west winds 5 to 15 knots becoming northwest less than
10 knots. waves 2 feet or less. 
.tonight...northwest winds 5 to 10 knots becoming northeast.
waves 1 foot or less. 
.friday...northeast winds 5 to 10 knots becoming east. waves
1 foot or less. 
.friday night...east winds around 10 knots becoming southeast.
waves 2 feet or less. 
.saturday...south winds 5 to 10 knots becoming west. waves 1 foot
or less. 
.sunday...northwest winds 10 knots or less becoming northeast
10 to 15 knots. waves 2 feet or less. 
.monday...east winds 10 to 15 knots becoming south 15 to
20 knots. waves 1 to 3 feet. 

$$

fzus61 kcle 100740
glfle 
expires:202609101415;;676500

open lake forecast for lake erie
national weather service cleveland oh
340 am edt thu sep 10 2026

for waters beyond five nautical miles of shore on lake erie

waves are the significant wave height - the average of the highest
1/3 of the wave spectrum. occasional wave height is the average of
the highest 1/10 of the wave spectrum.

.synopsis...
a frontal boundary will settle south of the lake today. high 
pressure 30.00 inches will build over the great lakes region tonight 
and continue to influence the region through friday. a warm front 
will cross the lake on friday night into saturday. a cold front will 
attempt to cross the lake on sunday.


lez164>167-101415-
the islands to vermilion oh beyond 5 nm off shoreline to us-
canadian border-
vermilion to avon point oh beyond 5 nm off shoreline to us-
canadian border-
avon point to willowick oh beyond 5 nm off shoreline to us-
canadian border-willowick to geneva-on-the-
lake oh beyond 5nm off shoreline to us-canadian border-
340 am edt thu sep 10 2026

.today...west winds 5 to 15 knots becoming northwest. waves 1 to
3 feet. 
.tonight...northwest winds 5 to 10 knots becoming northeast.
waves 2 feet or less. 
.friday...northeast winds 5 to 10 knots becoming east. waves
2 feet or less. 
.friday night...east winds 5 to 10 knots becoming southeast.
waves 2 feet or less. 
.saturday...south winds 5 to 15 knots becoming southwest. waves
2 feet or less. 
.sunday...west winds 5 to 15 knots becoming northeast. waves
2 feet or less. 
.monday...east winds 5 to 15 knots becoming south 15 to 20 knots.
waves 1 to 3 feet building to 2 to 4 feet. 

$$

fzus63 kdtx 100723
glfsc 
expires:202609101530;;676067

lake st clair forecast
national weather service detroit/pontiac mi
323 am edt thu sep 10 2026

waves are the significant wave height - the average of the highest
1/3 of the wave spectrum. occasional wave height is the average of
the highest 1/10 of the wave spectrum.

.synopsis...high pressure, 30.00 inches, expands into the region
latter half of thursday. this high then drifts over the central
great lakes through friday night.


lcz460-101530-
lake st clair-
323 am edt thu sep 10 2026

.today...northwest winds 5 to 10 knots in the morning becoming light
and variable...then becoming northwest 5 to 10 knots late in the
afternoon. partly sunny. waves 2 feet or less.
.tonight...north winds 5 to 10 knots veering to the northeast in the
late evening and overnight. partly cloudy in the evening then
clearing. waves 2 feet or less.
.friday...east winds 5 to 10 knots veering to the southeast early in
the afternoon. sunny. waves 2 feet or less.
.friday night...southeast winds 5 to 10 knots increasing to 10 to 15
knots by midnight...then diminishing to 5 to 10 knots after
midnight. mostly clear. waves 2 feet or less.
.saturday...south winds 5 to 10 knots. mostly sunny in the morning
becoming partly cloudy. waves 2 feet or less.
.sunday...north winds 10 to 15 knots. partly cloudy. waves 2 feet or
less.
.monday...southeast winds 20 to 25 knots. partly cloudy. waves 1 to
3 feet.

$$

fzus63 kdtx 100721
glflh 
expires:202609101530;;676035

open lake forecast for lake huron
national weather service detroit/pontiac mi
321 am edt thu sep 10 2026

for waters beyond five nautical miles off shore on lake huron

waves are the significant wave height - the average of the highest
1/3 of the wave spectrum. occasional wave height is the average of
the highest 1/10 of the wave spectrum.

.synopsis...high pressure, 30.00 inches, expands into the region
latter half of thursday. this high then drifts over the central
great lakes through friday night.


lhz463-464-101530-
lake huron from harbor beach to port sanilac beyond 5nm off shore-
lake huron from port sanilac to port huron beyond 5nm off shore-
321 am edt thu sep 10 2026

.today...northwest winds 5 to 10 knots. waves 2 feet or less. 
.tonight...north winds 5 to 10 knots  becoming light and
variable. waves 2 feet or less. 
.friday...light and variable winds becoming southeast 5 to
10 knots early in the afternoon. waves 2 feet or less. 
.friday night...southeast winds 5 to 10 knots becoming south
10 to 15 knots in the late evening and overnight. waves 2 feet or
less. 
.saturday...south winds 10 to 15 knots becoming southwest 5 to
10 knots late in the evening. waves 1 to 3 feet. 
.sunday...northwest winds 5 to 10 knots becoming 10 to 15 knots
by midnight. waves 2 feet or less. 
.monday...northeast winds 10 to 15 knots veering to the east
early in the evening...then becoming southeast 15 to 20 knots by
midnight. a chance of showers. waves 1 to 3 feet building to 3 to
5 feet . 


$$

fzus63 kdtx 100721
glflh 
expires:202609101530;;676033

open lake forecast for lake huron
national weather service detroit/pontiac mi
321 am edt thu sep 10 2026

for waters beyond five nautical miles off shore on lake huron

waves are the significant wave height - the average of the highest
1/3 of the wave spectrum. occasional wave height is the average of
the highest 1/10 of the wave spectrum.

.synopsis...high pressure, 30.00 inches, expands into the region
latter half of thursday. this high then drifts over the central
great lakes through friday night.


lhz361-362-101530-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
lake huron from presque isle light to sturgeon point mi beyond
5nm off shore-
321 am edt thu sep 10 2026

.today...west winds 10 to 15 knots. waves 3 to 5 feet. 
.tonight...northwest winds 10 to 15 knots becoming light and
variable. waves 2 to 4 feet subsiding to 1 to 3 feet in the late
evening and overnight. 
.friday...light and variable winds becoming south 5 to 10 knots
in the late morning and afternoon. waves 2 feet or less. 
.friday night...south winds 10 to 15 knots. waves 2 to 4 feet. 
.saturday...south winds 10 to 15 knots veering to the west late
in the evening. a chance of showers late in the morning. waves
3 to 5 feet subsiding to 1 to 3 feet late in the evening. 
.sunday...west winds 10 to 15 knots veering to the northwest by
midnight. waves 1 to 3 feet. 
.monday...north winds 5 to 10 knots becoming east 10 to 15 knots
in the late morning and early afternoon...then increasing to
15 to 20 knots with gusts to around 30 knots early in the evening
becoming southeast 20 to 25 knots with gusts to 35 knot gales by
midnight. a chance of showers...then showers likely by midnight.
waves 1 to 3 feet building to 6 to 9 feet. waves occasionally
around 12 feet. 


$$

fzus63 kdtx 100721
glflh 
expires:202609101530;;676034

open lake forecast for lake huron
national weather service detroit/pontiac mi
321 am edt thu sep 10 2026

for waters beyond five nautical miles off shore on lake huron

waves are the significant wave height - the average of the highest
1/3 of the wave spectrum. occasional wave height is the average of
the highest 1/10 of the wave spectrum.

.synopsis...high pressure, 30.00 inches, expands into the region
latter half of thursday. this high then drifts over the central
great lakes through friday night.


lhz363-462-101530-
lake huron from sturgeon point to alabaster mi beyond 5nm off
shore-
lake huron from port austin to harbor beach beyond 5nm off shore-
321 am edt thu sep 10 2026

.today...northwest winds 5 to 10 knots. waves 1 to 3 feet. 
.tonight...north winds 5 to 10 knots in the evening becoming
light and variable. waves 1 to 3 feet. 
.friday...light and variable winds becoming southwest 5 to
10 knots in the late morning and afternoon. waves 2 feet or less.
.friday night...south winds 5 to 10 knots increasing to 10 to
15 knots in the late evening and overnight. waves 1 to 3 feet. 
.saturday...south winds 10 to 15 knots becoming southwest 5 to
10 knots late in the evening. waves 2 to 4 feet subsiding to 1 to
3 feet late in the afternoon. 
.sunday...northwest winds 5 to 10 knots. a chance of. waves
2 feet or less. 
.monday...north winds 10 to 15 knots veering to the east until
early evening...then becoming southeast 20 to 25 knots with gusts
to around 30 knots by midnight. a chance of showers. waves 1 to
3 feet building to 5 to 7 feet. waves occasionally around
10 feet. 


$$

fzus63 kmkx 100748
glflm 
expires:202609101530;;676654

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
248 am cdt thu sep 10 2026

for waters beyond five nautical miles of shore on lake michigan.

waves are provided as a range of significant wave heights, which
is the average of the highest 1/3 of the wave, along with the
average height of the highest 10% of the waves which will
occasionally be encountered.

.synopsis...

high pressure of 30.0 inches over eastern south dakota will push
eastward into the great lakes region today, extending from
southern quebec down into the southern plains by tonight. low
pressure of 29.4 inches will develop over the high plains on
friday which will increase the winds out of the south going into
saturday before a cold front tracks across lake michigan from
north to south on saturday. high pressure of 30.2 inches will
extend down into the western great lakes from southern manitoba on
sunday. going into early next week, it looks like broad high
pressure of 30.3 inches will setup over the eastern great lakes as
low pressure of 29.5 inches develops of southern manitoba. this
will cause an increase in the winds across lake michigan, possibly
to gales.


lmz261-362-364-366-563-565-567-868-101530-
lake michigan from seul choix point to rock island passage 5 nm
offshore to mid lake-
lake michigan south of a line from seul choix point to the
mackinac bridge and north of a line from charlevoix mi to south
fox island 5 nm offshore-
lake michigan from charlevoix to point betsie mi 5 nm offshore to
mid lake-
lake michigan from point betsie to manistee mi 5 nm offshore to
mid lake-
lake michigan from rock island passage to sturgeon bay wi-
lake michigan from sturgeon bay to two rivers wi 5 nm offshore to
mid lake-
lake michigan from two rivers to sheboygan wi 5 nm offshore to
mid lake-
lake michigan from pentwater to manistee mi 5 nm offshore to mid
lake-
248 am cdt thu sep 10 2026

sheboygan wi to pentwater mi north...

.today...northwest winds 10 to 20 kt becoming southwest. waves
1 to 3 ft. 
.tonight...south winds 10 to 15 kt becoming southwest 10 to
20 kt. waves 1 to 3 ft. 
.friday...southwest winds 10 to 20 kt becoming south to 30 kt.
waves 4 to 6 ft occasionally to 8 ft. 
.friday night...south winds to 30 kt. waves 4 to 7 ft
occasionally to 9 ft. 
.saturday...southwest winds to 30 kt. waves 4 to 6 ft
occasionally to 8 ft. 
.saturday night...west winds 10 to 20 kt becoming north. waves
2 to 4 ft. 
.sunday...north winds 10 to 20 kt. waves 1 to 3 ft. 
.monday...east winds to 30 kt becoming southeast gales to 35 kt.
chance of showers. waves 7 to 10 ft occasionally to 13 ft.  

$$

fzus63 kmkx 100748
glflm 
expires:202609101530;;676655

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
248 am cdt thu sep 10 2026

for waters beyond five nautical miles of shore on lake michigan.

waves are provided as a range of significant wave heights, which
is the average of the highest 1/3 of the wave, along with the
average height of the highest 10% of the waves which will
occasionally be encountered.

.synopsis...

high pressure of 30.0 inches over eastern south dakota will push
eastward into the great lakes region today, extending from
southern quebec down into the southern plains by tonight. low
pressure of 29.4 inches will develop over the high plains on
friday which will increase the winds out of the south going into
saturday before a cold front tracks across lake michigan from
north to south on saturday. high pressure of 30.2 inches will
extend down into the western great lakes from southern manitoba on
sunday. going into early next week, it looks like broad high
pressure of 30.3 inches will setup over the eastern great lakes as
low pressure of 29.5 inches develops of southern manitoba. this
will cause an increase in the winds across lake michigan, possibly
to gales.


lmz080-669-671-673-675-777-779-870-872-874-876-878-101530-
lake michigan from michigan city in to st. joseph mi 5 nm
offshore to mid lake-
lake michigan from sheboygan to port washington wi 5 nm offshore
to mid lake-
lake michigan from port washington to north point light wi 5 nm
offshore to mid lake-
lake michigan from north point light to wind point wi 5 nm
offshore to mid lake-
lake michigan from wind point wi to winthrop harbor il 5 nm
offshore to mid lake-
lake michigan from winthrop harbor to wilmette harbor il 5 nm
offshore to mid lake-
lake michigan from wilmette harbor il to michigan city in 5 nm
offshore to mid lake-
lake michigan from whitehall to pentwater mi 5 nm offshore to mid
lake-
lake michigan from grand haven to whitehall mi 5 nm offshore to
mid lake-
lake michigan from holland to grand haven mi 5 nm offshore to mid
lake-
lake michigan from south haven to holland mi 5 nm offshore to mid
lake-
lake michigan from st. joseph to south haven mi 5 nm offshore to
mid lake-
248 am cdt thu sep 10 2026

sheboygan wi to pentwater mi south...

.today...northwest winds 10 to 15 kt becoming northeast. waves
1 to 3 ft. 
.tonight...northeast winds 10 to 15 kt veering to southeast.
waves 1 to 2 ft. 
.friday...south winds 10 to 15 kt increasing to 15 to 25 kt.
waves 2 to 4 ft. 
.friday night...southeast winds 15 to 25 kt becoming south 10 to
20 kt. waves 3 to 5 ft. 
.saturday...south winds 15 to 25 kt becoming southwest. waves
4 to 6 ft occasionally to 8 ft. 
.saturday night...west winds 10 to 20 kt becoming northwest.
waves 2 to 4 ft. 
.sunday...north winds 10 to 20 kt. waves 2 to 4 ft. 
.monday...southeast winds to 30 kt becoming south gales to 35 kt.
chance of showers. waves 7 to 10 ft occasionally to 13 ft.  

$$

fzus63 kmqt 100801
glfls 
expires:202609102000;;677030

open lake forecast for lake superior
national weather service marquette mi
401 am edt thu sep 10 2026

for waters beyond 5 nautical miles of shore on lake superior.

waves are the significant wave height - the average of the
highest 1/3 of the wave spectrum. occasional wave height is the
average of the highest 1/10 of the wave spectrum.

.synopsis...

30.0 inch ridging builds over the lake today, allowing calmer 
conditions until friday morning. a trough averaging 29.5 inches 
tracks from the great plains north toward hudson bay by friday 
afternoon, bringing 29.8 inch troughing to the lake. a cold front 
and 29.7 inch trough passes through on saturday with ridging in its 
wake reaching 30.0 inches by sunday. this strengthens further to 
30.2 inches monday. 




lsz162-102000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 am edt thu sep 10 2026 /301 am cdt thu sep 10 2026/

.early this morning...northwest winds 5 to 15 knots. waves calm
to 2 feet. 
.today...west winds 5 to 15 knots backing south in the afternoon.
waves calm to 2 feet. 
.tonight...south winds 5 to 15 knots increasing to 10 to 20 knots
after midnight, then becoming southwest 15 to 25 knots late.
waves building to 1 to 3 feet. 
.friday...southwest winds 20 to 30 knots backing south late. a
slight chance of showers and thunderstorms by mid afternoon.
waves building to 3 to 5 feet occasionally to 7 feet, then
subsiding to 2 to 4 feet. 
.friday night...south winds 15 to 25 knots veering southwest
after midnight. showers and a chance of thunderstorms. waves
subsiding to 1 to 3 feet, then building to 3 to 6 feet
occasionally to 8 feet. 
.saturday...west winds 15 to 25 knots increasing to 20 to
30 knots by mid afternoon. waves subsiding to 1 to 3 feet, then
building to 2 to 4 feet. 
.saturday night...west winds 10 to 20 knots. waves subsiding to
calm to 2 feet. 
.sunday...west winds 10 to 20 knots becoming east 15 to 25 knots.
a chance of showers. waves building to 2 to 4 feet. 
.monday...east gales to 35 knots veering west. showers likely,
then a chance of showers. waves building to 5 to 9 feet
occasionally to 11 feet. 

$$

fzus63 kmqt 100801
glfls 
expires:202609102000;;677031

open lake forecast for lake superior
national weather service marquette mi
401 am edt thu sep 10 2026

for waters beyond 5 nautical miles of shore on lake superior.

waves are the significant wave height - the average of the
highest 1/3 of the wave spectrum. occasional wave height is the
average of the highest 1/10 of the wave spectrum.

.synopsis...

30.0 inch ridging builds over the lake today, allowing calmer 
conditions until friday morning. a trough averaging 29.5 inches 
tracks from the great plains north toward hudson bay by friday 
afternoon, bringing 29.8 inch troughing to the lake. a cold front 
and 29.7 inch trough passes through on saturday with ridging in its 
wake reaching 30.0 inches by sunday. this strengthens further to 
30.2 inches monday. 




lsz263-102000-
lake superior from saxon harbor wi to upper entrance to portage
canal mi 5nm off shore to the us/canadian border including isle
royale national park-
401 am edt thu sep 10 2026

.early this morning...northwest winds 5 to 15 knots. waves 1 to
3 feet. 
.today...northwest winds 5 to 15 knots backing southwest in the
afternoon, then becoming south 10 to 20 knots late. waves
subsiding to calm to 2 feet. 
.tonight...south winds 5 to 15 knots increasing to 15 to 25 knots
after midnight, then becoming southwest 20 to 30 knots late.
waves building to 2 to 4 feet. 
.friday...southwest winds 20 to 30 knots. a slight chance of
showers by mid afternoon. waves building to 4 to 7 feet
occasionally to 9 feet, then subsiding to 2 to 4 feet. 
.friday night...south winds 15 to 25 knots veering southwest
after midnight. showers and a chance of thunderstorms. waves
building to 3 to 6 feet occasionally to 8 feet. 
.saturday...west winds 20 to 30 knots. waves building to 3 to
6 feet occasionally to 8 feet. 
.saturday night...west winds 20 to 30 knots diminishing to 15 to
25 knots after midnight. waves subsiding to 1 to 3 feet. 
.sunday...west winds 10 to 20 knots becoming east 15 to 25 knots.
a chance of showers. waves subsiding to calm to 2 feet, then
building to 1 to 3 feet. 
.monday...east gales to 35 knots becoming west gales to 40 knots.
showers likely. waves building to 7 to 10 feet occasionally to
13 feet. 

$$

fzus63 kmqt 100801
glfls 
expires:202609102000;;677032

open lake forecast for lake superior
national weather service marquette mi
401 am edt thu sep 10 2026

for waters beyond 5 nautical miles of shore on lake superior.

waves are the significant wave height - the average of the
highest 1/3 of the wave spectrum. occasional wave height is the
average of the highest 1/10 of the wave spectrum.

.synopsis...

30.0 inch ridging builds over the lake today, allowing calmer 
conditions until friday morning. a trough averaging 29.5 inches 
tracks from the great plains north toward hudson bay by friday 
afternoon, bringing 29.8 inch troughing to the lake. a cold front 
and 29.7 inch trough passes through on saturday with ridging in its 
wake reaching 30.0 inches by sunday. this strengthens further to 
30.2 inches monday. 




lsz264-102000-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
401 am edt thu sep 10 2026

.early this morning...northwest winds 5 to 15 knots. waves 2 to
4 feet. 
.today...northwest winds 5 to 15 knots backing southwest late.
waves subsiding to calm to 2 feet. 
.tonight...south winds 5 to 15 knots increasing to 15 to
25 knots. waves building to 2 to 4 feet. 
.friday...southwest winds 20 to 30 knots becoming south 15 to
25 knots late. waves building to 3 to 6 feet occasionally to
8 feet, then subsiding to 2 to 4 feet. 
.friday night...south winds 15 to 25 knots. a chance of showers
through midnight. a chance of thunderstorms. showers after
midnight. waves building to 3 to 5 feet occasionally to 7 feet. 
.saturday...west winds 15 to 25 knots increasing to 20 to
30 knots by mid afternoon. waves building to 3 to 6 feet
occasionally to 8 feet. 
.saturday night...west winds 20 to 30 knots becoming northwest
15 to 25 knots after midnight. waves subsiding to 1 to 3 feet. 
.sunday...northwest winds 15 to 25 knots diminishing to 10 to
20 knots. waves subsiding to calm to 2 feet. 
.monday...southeast gales to 35 knots becoming west gales to
40 knots. a chance of showers, then showers likely. waves
building to 7 to 11 feet occasionally to 14 feet. 

$$

fzus63 kmqt 100801
glfls 
expires:202609102000;;677033

open lake forecast for lake superior
national weather service marquette mi
401 am edt thu sep 10 2026

for waters beyond 5 nautical miles of shore on lake superior.

waves are the significant wave height - the average of the
highest 1/3 of the wave spectrum. occasional wave height is the
average of the highest 1/10 of the wave spectrum.

.synopsis...

30.0 inch ridging builds over the lake today, allowing calmer 
conditions until friday morning. a trough averaging 29.5 inches 
tracks from the great plains north toward hudson bay by friday 
afternoon, bringing 29.8 inch troughing to the lake. a cold front 
and 29.7 inch trough passes through on saturday with ridging in its 
wake reaching 30.0 inches by sunday. this strengthens further to 
30.2 inches monday. 




lsz265-102000-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
401 am edt thu sep 10 2026

.early this morning...northwest winds 15 to 25 knots. waves 2 to
4 feet subsiding to 1 to 3 feet. 
.today...northwest winds 10 to 20 knots diminishing to 5 to
15 knots in the afternoon, then backing southeast late. waves
subsiding to calm to 2 feet. 
.tonight...south winds 5 to 15 knots increasing to 15 to 25 knots
after midnight, then veering southwest late. waves calm to
2 feet. 
.friday...southwest winds 20 to 30 knots backing south in the
afternoon. waves building to 2 to 4 feet, then subsiding to 1 to
3 feet. 
.friday night...south winds 20 to 30 knots. showers likely and a
slight chance of thunderstorms after midnight. waves building to
3 to 5 feet occasionally to 7 feet. 
.saturday...west gales to 35 knots diminishing to 20 to 30 knots
by mid afternoon. waves building to 3 to 6 feet occasionally to
8 feet. 
.saturday night...west winds 20 to 30 knots. waves subsiding to
1 to 3 feet. 
.sunday...northwest winds 15 to 25 knots. a chance of showers.
waves subsiding to calm to 2 feet, then building to 1 to 3 feet. 
.monday...southeast gales to 40 knots becoming west gales to
45 knots. showers likely. waves building to 6 to 10 feet
occasionally to 13 feet. 

$$

fzus63 kmqt 100801
glfls 
expires:202609102000;;677035

open lake forecast for lake superior
national weather service marquette mi
401 am edt thu sep 10 2026

for waters beyond 5 nautical miles of shore on lake superior.

waves are the significant wave height - the average of the
highest 1/3 of the wave spectrum. occasional wave height is the
average of the highest 1/10 of the wave spectrum.

.synopsis...

30.0 inch ridging builds over the lake today, allowing calmer 
conditions until friday morning. a trough averaging 29.5 inches 
tracks from the great plains north toward hudson bay by friday 
afternoon, bringing 29.8 inch troughing to the lake. a cold front 
and 29.7 inch trough passes through on saturday with ridging in its 
wake reaching 30.0 inches by sunday. this strengthens further to 
30.2 inches monday. 




lsz267-102000-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
401 am edt thu sep 10 2026

.early this morning...northwest winds 20 to 30 knots. waves 5 to
9 feet occasionally to 11 feet. 
.today...northwest winds 15 to 25 knots diminishing to 10 to
20 knots in the afternoon, then becoming west 5 to 15 knots late.
waves subsiding to 1 to 3 feet. 
.tonight...west winds 5 to 15 knots backing south after midnight,
then increasing to 10 to 20 knots late. waves subsiding to calm
to 2 feet, then building to 1 to 3 feet. 
.friday...south winds 15 to 25 knots. waves building to 2 to
4 feet. 
.friday night...south winds 20 to 30 knots. a slight chance of
showers after midnight. waves building to 4 to 7 feet
occasionally to 9 feet. 
.saturday...southwest winds 20 to 30 knots becoming west 15 to
25 knots by mid afternoon. a chance of showers. waves subsiding
to 3 to 5 feet occasionally to 7 feet. 
.saturday night...west winds 15 to 25 knots becoming northwest
20 to 30 knots after midnight. waves subsiding to 2 to 4 feet. 
.sunday...northwest winds 15 to 25 knots diminishing to 10 to
20 knots. waves subsiding to calm to 2 feet. 
.monday...southeast winds 15 to 25 knots becoming south gales to
40 knots. a chance of showers, then showers and a chance of
thunderstorms. waves building to 6 to 10 feet occasionally to
13 feet. 

$$

fzus63 kmqt 100801
glfls 
expires:202609102000;;677034

open lake forecast for lake superior
national weather service marquette mi
401 am edt thu sep 10 2026

for waters beyond 5 nautical miles of shore on lake superior.

waves are the significant wave height - the average of the
highest 1/3 of the wave spectrum. occasional wave height is the
average of the highest 1/10 of the wave spectrum.

.synopsis...

30.0 inch ridging builds over the lake today, allowing calmer 
conditions until friday morning. a trough averaging 29.5 inches 
tracks from the great plains north toward hudson bay by friday 
afternoon, bringing 29.8 inch troughing to the lake. a cold front 
and 29.7 inch trough passes through on saturday with ridging in its 
wake reaching 30.0 inches by sunday. this strengthens further to 
30.2 inches monday. 




lsz266-102000-
lake superior east of a line from manitou island to marquette mi
and west of a line from grand marais mi to the us/canadian border
beyond 5nm from shore-
401 am edt thu sep 10 2026

.early this morning...northwest winds 15 to 25 knots. waves 4 to
7 feet occasionally to 9 feet subsiding to 3 to 6 feet
occasionally to 8 feet. 
.today...northwest winds 10 to 20 knots diminishing to 5 to
15 knots in the afternoon, then backing west late. waves
subsiding to calm to 2 feet. 
.tonight...south winds 5 to 15 knots increasing to 15 to
25 knots. waves building to 2 to 4 feet. 
.friday...south winds 20 to 30 knots diminishing to 15 to
25 knots in the afternoon, then increasing to 20 to 30 knots
late. waves building to 3 to 5 feet occasionally to 7 feet. 
.friday night...south winds 20 to 30 knots. a chance of showers
and a slight chance of thunderstorms. waves building to 5 to
8 feet occasionally to 10 feet. 
.saturday...southwest winds 20 to 30 knots veering west by mid
afternoon. a chance of showers through early afternoon. waves
subsiding to 3 to 6 feet occasionally to 8 feet. 
.saturday night...west winds 20 to 30 knots veering northwest
after midnight. waves subsiding to 2 to 4 feet. 
.sunday...northwest winds 20 to 30 knots diminishing to 10 to
20 knots. waves subsiding to calm to 2 feet, then building to
1 to 3 feet. 
.monday...southeast gales to 40 knots becoming south gales to
45 knots. a chance of showers. waves building to 8 to 11 feet
occasionally to 14 feet. 

$$