(1/5)
Latest Great Lakes Marine Forecast by KBUF
Issued 8/18/2026 10:02 AM America/New_York.
Valid through 8/18/2026 5:00 PM America/New_York.
fzus61 kbuf 181402
glflo
expires:202608182100;;938393
open lake forecast for lake ontario
national weather service buffalo ny
1002 am edt tue aug 18 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 ridge of high pressure averaging 30.0 inches will
build across the lower great lakes today. the ridge exits eastward
tonight before a cold front sweeps eastward across lake ontario on
wednesday. behind the front, a ridge averaging 30.1 inches builds
from the western great lakes through friday. this ridge should exit
eastward friday night through saturday and allow a warm front to
drift northward across lake ontario.
loz062-182100-
lake ontario open waters from the niagara river to hamlin beach-
1002 am edt tue aug 18 2026
.this afternoon...west winds 10 knots or less becoming southwest.
waves 1 foot or less.
.tonight...southwest winds 10 to 15 knots. a chance of showers
after midnight. showers likely late. waves 1 to 3 feet.
.wednesday...southwest winds 5 to 10 knots becoming west. a
chance of showers. waves 1 to 2 feet.
.wednesday night...northwest winds 5 to 10 knots. waves 2 feet or
less.
.thursday...northwest winds 10 knots or less becoming northeast.
waves 1 foot or less.
.friday...east winds 10 knots or less becoming southeast. waves
1 foot or less.
.saturday...south winds 5 to 10 knots becoming southwest. a
chance of showers during the day, then showers likely saturday
night. waves 2 feet or less.
$$
(2/5)
Latest Great Lakes Marine Forecast by KBUF
Issued 8/18/2026 10:02 AM America/New_York.
Valid through 8/18/2026 5:00 PM America/New_York.
fzus61 kbuf 181402
glflo
expires:202608182100;;938394
open lake forecast for lake ontario
national weather service buffalo ny
1002 am edt tue aug 18 2026
for waters beyond five nautical miles of shore on lake ontario
waves are the significant wave height - the average of the highest
1/3 of the wave spectrum. occasional wave height is the average of
the highest 1/10 of the wave spectrum.
.synopsis...a ridge of high pressure averaging 30.0 inches will
build across the lower great lakes today. the ridge exits eastward
tonight before a cold front sweeps eastward across lake ontario on
wednesday. behind the front, a ridge averaging 30.1 inches builds
from the western great lakes through friday. this ridge should exit
eastward friday night through saturday and allow a warm front to
drift northward across lake ontario.
loz063>065-182100-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1002 am edt tue aug 18 2026
.this afternoon...west winds 10 knots or less. waves 1 foot or
less.
.tonight...southwest winds 5 to 15 knots. a chance of showers
late. waves 2 feet or less.
.wednesday...southwest winds 10 to 15 knots becoming west.
showers likely in the morning, then a chance of showers and
thunderstorms in the afternoon. waves 1 to 3 feet.
.wednesday night...west winds 5 to 15 knots becoming northwest.
waves 1 to 3 feet.
.thursday...northwest winds 5 to 10 knots becoming north. waves
1 foot or less.
.friday...east winds 10 knots or less becoming southeast. waves
1 foot or less.
.saturday...southeast winds 5 to 15 knots becoming south. a
chance of showers during the day, then showers likely saturday
night. waves 2 feet or less.
winds and waves higher in and near thunderstorms.
$$
(3/5)
Latest Great Lakes Marine Forecast by KCLE
Issued 8/18/2026 9:42 AM America/New_York.
Valid through 8/18/2026 4:15 PM America/New_York.
fzus61 kcle 181342
glfle
expires:202608182015;;937980
open lake forecast for lake erie
national weather service cleveland oh
942 am edt tue aug 18 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...
high pressure 30.00 inches will move south of lake erie today. a
cold front will move south across the lake on wednesday. high
pressure 30.20 inches will build over the lake on thursday and
friday. low pressure 30.10 inches will enter the central great
lakes region on saturday with a cold front approaching lake erie
from the west.
lez162>164-182015-
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-
the islands to vermilion oh beyond 5 nm off shoreline to us-
canadian border-
942 am edt tue aug 18 2026
.this afternoon...west winds 5 to 10 knots becoming southwest.
waves 1 foot or less.
.tonight...southwest winds 10 to 15 knots becoming west. a chance
of showers with a slight chance of thunderstorms after midnight.
waves 2 feet or less.
.wednesday...west winds 5 to 15 knots becoming northwest less
than 10 knots. a chance of showers. waves 2 feet or less.
.wednesday night...north winds 10 knots or less becoming east. a
chance of showers in the evening. waves 1 foot or less.
.thursday...east winds 5 to 10 knots becoming southeast. waves
1 foot or less.
.friday...south winds 10 knots or less. waves 1 foot or less.
.saturday...southwest winds 10 to 15 knots becoming northwest. a
chance of showers and thunderstorms during the day, then a chance
of showers saturday night. waves 2 feet or less.
winds and waves higher in and near thunderstorms.
$$
(4/5)
Latest Great Lakes Marine Forecast by KCLE
Issued 8/18/2026 9:42 AM America/New_York.
Valid through 8/18/2026 4:15 PM America/New_York.
fzus61 kcle 181342
glfle
expires:202608182015;;937981
open lake forecast for lake erie
national weather service cleveland oh
942 am edt tue aug 18 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...
high pressure 30.00 inches will move south of lake erie today. a
cold front will move south across the lake on wednesday. high
pressure 30.20 inches will build over the lake on thursday and
friday. low pressure 30.10 inches will enter the central great
lakes region on saturday with a cold front approaching lake erie
from the west.
lez165>167-182015-
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-
942 am edt tue aug 18 2026
.this afternoon...northwest winds 10 knots or less becoming west.
waves 1 foot or less.
.tonight...southwest winds 10 to 15 knots becoming west 15 to
20 knots. a chance of showers with a slight chance of
thunderstorms after midnight. waves 1 to 3 feet building to 2 to
4 feet.
.wednesday...west winds 5 to 15 knots. a chance of showers. waves
2 to 4 feet subsiding to 1 to 3 feet.
.wednesday night...north winds 5 to 10 knots becoming east. a
chance of showers in the evening. waves 2 feet or less.
.thursday...east winds 5 to 10 knots. waves 1 foot or less.
.friday...east winds 10 knots or less becoming south. waves
1 foot or less.
.saturday...southwest winds 10 to 15 knots becoming west. a
chance of showers during the day, then showers likely with a
chance of thunderstorms saturday night. waves 1 to 3 feet.
winds and waves higher in and near thunderstorms.
$$
(5/5)
Latest Great Lakes Marine Forecast by KCLE
Issued 8/18/2026 9:42 AM America/New_York.
Valid through 8/18/2026 4:15 PM America/New_York.
fzus61 kcle 181342
glfle
expires:202608182015;;937982
open lake forecast for lake erie
national weather service cleveland oh
942 am edt tue aug 18 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...
high pressure 30.00 inches will move south of lake erie today. a
cold front will move south across the lake on wednesday. high
pressure 30.20 inches will build over the lake on thursday and
friday. low pressure 30.10 inches will enter the central great
lakes region on saturday with a cold front approaching lake erie
from the west.
lez061-168-169-182015-
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-
942 am edt tue aug 18 2026
.this afternoon...northwest winds 10 knots or less becoming west.
waves 1 foot or less.
.tonight...southwest winds 10 to 15 knots. a chance of showers
with a slight chance of thunderstorms after midnight. waves 1 to
3 feet building to 2 to 4 feet.
.wednesday...west winds 10 to 15 knots. showers likely in the
morning, then a chance of showers in the afternoon. waves 2 to
4 feet.
.wednesday night...west winds 5 to 10 knots becoming northeast.
waves 1 to 2 feet.
.thursday...east winds 10 knots or less. waves 1 foot or less.
.friday...east winds 10 knots or less becoming southeast. waves
1 foot or less.
.saturday...south winds 5 to 10 knots becoming southwest. a
chance of showers during the day, then showers likely with a
chance of thunderstorms saturday night. waves 2 feet or less.
winds and waves higher in and near thunderstorms.
$$
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