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open lake forecast for lake ontario
national weather service buffalo ny
1002 pm edt sun oct 19 2025

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 29.3 inch low will continue to move north to james bay 
through tonight, with a trailing cold front crossing the lake. 
another 29.6 inch low will develop along the frontal boundary 
overnight, with this low moving north into quebec by monday night. 
another 29.4 inch low will then move into the upper great lakes 
tuesday night and wednesday before consolidating with the low over 
central quebec by wednesday night. this low will then move to far 
northern quebec by friday.


loz062-200900-
lake ontario open waters from the niagara river to hamlin beach-
1002 pm edt sun oct 19 2025

.overnight...south winds 15 to 25 knots becoming west.
showers. waves 2 to 4 feet building to 3 to 6 feet. 
.monday...west winds to 30 knots. showers in the morning, then a
chance of showers early in the afternoon. waves 5 to 8 feet
building to 7 to 11 feet. waves occasionally around 14 feet. 
.monday night...west winds to 30 knots becoming southwest and
diminishing to 10 to 15 knots overnight. waves 7 to 10 feet
subsiding to 2 to 4 feet. waves occasionally around 13 feet. 
.tuesday...south winds 10 to 15 knots becoming southwest and
increasing to 15 to 25 knots. showers. waves 1 to 3 feet building
to 3 to 6 feet. 
.tuesday night...southwest winds 15 to 20 knots. showers. waves
3 to 5 feet subsiding to 2 to 4 feet. 
.wednesday...southwest winds 15 to 25 knots becoming west.
showers. waves 3 to 5 feet building to 5 to 8 feet. waves
occasionally around 10 feet. 
.thursday...west winds to 30 knots diminishing to 15 to 20 knots.
showers. waves 5 to 9 feet subsiding to 3 to 6 feet. waves
occasionally around 11 feet. 
.friday...west winds 15 to 20 knots becoming northwest 10 to
15 knots. showers likely during the day, then a chance of showers
friday night. waves 3 to 5 feet subsiding to 1 to 3 feet. 

$$

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open lake forecast for lake ontario
national weather service buffalo ny
1002 pm edt sun oct 19 2025

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 29.3 inch low will continue to move north to james bay 
through tonight, with a trailing cold front crossing the lake. 
another 29.6 inch low will develop along the frontal boundary 
overnight, with this low moving north into quebec by monday night. 
another 29.4 inch low will then move into the upper great lakes 
tuesday night and wednesday before consolidating with the low over 
central quebec by wednesday night. this low will then move to far 
northern quebec by friday.


loz063>065-200900-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1002 pm edt sun oct 19 2025

.overnight...south winds 15 to 20 knots becoming southwest.
showers. waves 3 to 6 feet subsiding to 3 to 5 feet. 
.monday...west winds 15 to 25 knots increasing to 30 knots.
showers. waves 5 to 8 feet building to 10 to 14 feet. waves
occasionally around 18 feet. 
.monday night...west winds to 30 knots becoming southwest 15 to
25 knots. a chance of showers. waves 10 to 14 feet subsiding to
4 to 7 feet. waves occasionally around 18 feet. 
.tuesday...south winds 15 to 20 knots becoming southwest 10 to
15 knots. a chance of showers in the morning, then showers likely
in the afternoon. waves 2 to 4 feet subsiding to 1 to 3 feet. 
.tuesday night...southwest winds 15 to 20 knots. showers. waves
1 to 3 feet building to 2 to 4 feet. 
.wednesday...southwest winds 15 to 25 knots becoming west to
30 knots. showers. waves 3 to 6 feet building to 7 to 10 feet.
waves occasionally around 13 feet. 
.thursday...west winds to 30 knots diminishing to 15 to 25 knots.
showers. waves 7 to 11 feet subsiding to 5 to 8 feet. waves
occasionally around 14 feet. 
.friday...west winds 15 to 20 knots becoming northwest 10 to
15 knots. showers likely. waves 3 to 6 feet subsiding to 2 to
4 feet. 

$$

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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
1002 pm edt sun oct 19 2025


slz022-024-200900-
saint lawrence river from cape vincent to saint regis
1002 pm edt sun oct 19 2025

.overnight...south winds 5 to 15 knots. showers.
.monday...southwest winds 5 to 15 knots becoming west 15 to
20 knots. showers.
.monday night...west winds 15 to 20 knots becoming southwest 5 to
15 knots. showers.
.tuesday...southwest winds 5 to 10 knots becoming south. a chance
of showers. 
.tuesday night...south winds 5 to 10 knots. showers.
.wednesday...south winds 5 to 15 knots becoming southwest.
showers.
.thursday...southwest winds 5 to 15 knots becoming west. rain
showers. 
.friday...west winds 10 knots or less. rain showers likely during
the day, then a chance of rain showers friday night. 

$$

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open lake forecast for lake erie
national weather service cleveland oh
922 pm edt sun oct 19 2025

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 cold front currently over central lake erie will move eastward
across the rest of the eastern great lakes tonight. a ridge 
averaging 30.00 inches will briefly build over the ohio valley on 
monday. low pressure of 29.40 inches will track east across the 
upper great lakes tuesday into wednesday. a cold front will cross 
the lake on tuesday, with a secondary cold front expected to cross
the lake on wednesday.


lez061-168-169-200815-
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-
922 pm edt sun oct 19 2025

.rest of tonight...west winds to 30 knots becoming northwest.
showers with a slight chance of thunderstorms late this evening,
then showers after midnight. waves 5 to 8 feet building to 7 to
10 feet. waves occasionally around 13 feet. 
.monday...northwest winds to 30 knots becoming west. a chance of
showers in the morning. waves 6 to 10 feet subsiding to 5 to
8 feet. waves occasionally around 13 feet. 
.monday night...west winds 15 to 20 knots becoming south. waves
4 to 7 feet subsiding to 3 to 5 feet. waves occasionally around
9 feet. 
.tuesday...south winds 15 to 25 knots becoming southwest.
showers. waves 3 to 6 feet building to 5 to 9 feet. waves
occasionally around 11 feet. 
.tuesday night...southwest winds to 30 knots. showers with a
chance of thunderstorms in the evening, then showers overnight.
waves 6 to 10 feet. waves occasionally around 13 feet. 
.wednesday...southwest winds to 30 knots becoming west. showers.
waves 7 to 11 feet. waves occasionally around 14 feet. 
.thursday...west winds 15 to 25 knots. showers. waves 6 to 9 feet
subsiding to 3 to 6 feet. waves occasionally around 11 feet. 
.friday...west winds 15 to 20 knots diminishing to 5 to 15 knots.
showers likely during the day, then a chance of showers friday
night. waves 2 to 4 feet subsiding to 1 to 2 feet. 

winds and waves higher in and near thunderstorms.

$$