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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
1003 pm edt fri jun 12 2026


slz022-024-130900-
saint lawrence river from cape vincent to saint regis
1003 pm edt fri jun 12 2026

.overnight...west winds 5 to 10 knots becoming southwest.
mainly clear. 
.saturday...southwest winds 5 to 10 knots. sunny.
.saturday night...southwest winds 5 to 10 knots becoming south. a
chance of showers overnight. 
.sunday...southwest winds 5 to 10 knots. a chance of showers in
the morning, then showers with a chance of thunderstorms in the
afternoon. 
.sunday night...southwest winds 5 to 10 knots. showers with a
chance of thunderstorms in the evening, then showers likely
overnight. 
.monday...west winds 5 to 15 knots becoming southwest less than
10 knots. partly cloudy. 
.tuesday...southwest winds 10 knots or less becoming south.
partly cloudy. 
.wednesday...south winds 5 to 10 knots. a chance of showers. 

winds and waves higher in and near thunderstorms.

$$

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open lake forecast for lake ontario
national weather service buffalo ny
1002 pm edt fri jun 12 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 30.0 inch high will ridge across the lower great lakes 
tonight through sunday morning, then a cold front will crosses the 
region sunday afternoon and evening. the eastern edge of a 30.1 inch 
high over the plains states will push over the lake on monday with a 
trough averaging 29.8 inches crossing the lake on tuesday. a 29.4 
inch low will then track north of the lake on wednesday, with its 
trailing cold front approaching the lake late in the day on 
wednesday.


loz062-130900-
lake ontario open waters from the niagara river to hamlin beach-
1002 pm edt fri jun 12 2026

.overnight...west winds 10 to 15 knots becoming southwest.
waves 1 to 3 feet. 
.saturday...southwest winds 10 to 15 knots increasing to 15 to
20 knots. waves 1 to 3 feet. 
.saturday night...southwest winds 15 to 20 knots. waves 1 to
3 feet. 
.sunday...southwest winds 10 to 15 knots becoming west. showers
in the morning, then showers with a chance of thunderstorms in
the afternoon. waves 1 to 3 feet. 
.sunday night...west winds 10 to 15 knots increasing to 15 to
20 knots. showers with a chance of thunderstorms in the evening.
waves 2 to 4 feet. 
.monday...west winds 15 to 20 knots becoming southwest 5 to
15 knots. waves 2 to 4 feet subsiding to 1 to 2 feet. 
.tuesday...southwest winds 5 to 10 knots becoming south. a chance
of showers tuesday night. waves 2 feet or less. 
.wednesday...south winds 5 to 15 knots. a chance of showers
during the day, then showers likely wednesday night. waves 1 to
2 feet. 

winds and waves higher in and near thunderstorms.

$$

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open lake forecast for lake ontario
national weather service buffalo ny
1002 pm edt fri jun 12 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 30.0 inch high will ridge across the lower great lakes 
tonight through sunday morning, then a cold front will crosses the 
region sunday afternoon and evening. the eastern edge of a 30.1 inch 
high over the plains states will push over the lake on monday with a 
trough averaging 29.8 inches crossing the lake on tuesday. a 29.4 
inch low will then track north of the lake on wednesday, with its 
trailing cold front approaching the lake late in the day on 
wednesday.


loz063>065-130900-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1002 pm edt fri jun 12 2026

.overnight...west winds 5 to 15 knots becoming southwest.
waves 2 to 4 feet subsiding to 1 to 3 feet. 
.saturday...west winds 5 to 15 knots. waves 1 to 3 feet. 
.saturday night...southwest winds 10 to 15 knots becoming south.
waves 1 to 2 feet. 
.sunday...south winds 10 to 15 knots becoming west. showers
likely in the morning, then showers with a chance of
thunderstorms in the afternoon. waves 1 to 2 feet. 
.sunday night...west winds 10 to 15 knots increasing to 15 to
20 knots. showers with a chance of thunderstorms in the evening,
then a chance of showers overnight. waves 1 to 3 feet building to
3 to 6 feet. 
.monday...west winds 15 to 20 knots becoming southwest 5 to
15 knots. waves 3 to 6 feet subsiding to 1 to 2 feet. 
.tuesday...southwest winds 5 to 15 knots becoming south. waves
2 feet or less. 
.wednesday...south winds 5 to 15 knots increasing to 15 to
20 knots. a chance of showers during the day, then showers likely
wednesday night. waves 2 feet or less building to 2 to 4 feet. 

winds and waves higher in and near thunderstorms.

$$

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open lake forecast for lake erie
national weather service cleveland oh
930 pm edt fri jun 12 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 ridge averaging 30.00 inches will persist over the ohio valley 
through saturday. a cold front will move east across lake erie on 
on sunday, followed by a ridge averaging 30.00 inches monday into 
tuesday. a stronger low pressure system 29.40 inches will approach
the western great lakes on wednesday.


lez061-167>169-130815-
ripley to buffalo ny extending from 5nm off shoreline to us-
canadian border-willowick to geneva-on-the-
lake oh beyond 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-
930 pm edt fri jun 12 2026

.overnight...southwest winds around 10 knots becoming west.
waves 2 to 4 feet. 
.saturday...southwest winds 5 to 10 knots. waves 1 to 2 feet. 
.saturday night...south winds 5 to 15 knots becoming southwest.
waves 1 to 3 feet. 
.sunday...southwest winds 10 to 15 knots becoming west. showers
in the morning, then showers with a chance of thunderstorms in
the afternoon. waves 1 to 3 feet. 
.sunday night...northwest winds 10 to 15 knots. showers in the
evening. waves 1 to 3 feet. 
.monday...northwest winds 5 to 15 knots becoming southwest. waves
1 to 2 feet. 
.tuesday...southwest winds 5 to 15 knots becoming south 15 to
20 knots. a chance of showers tuesday night. waves 1 to 2 feet
building to 2 to 4 feet. 
.wednesday...southwest winds 15 to 20 knots becoming south and
increasing to 30 knots. a chance of showers during the day, then
showers with a chance of thunderstorms wednesday night. waves
3 to 5 feet building to 4 to 7 feet. waves occasionally around
9 feet. 

winds and waves higher in and near thunderstorms.

$$