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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
403 am edt sat jun 13 2026


slz022-024-131500-
saint lawrence river from cape vincent to saint regis
403 am edt sat jun 13 2026

.today...southwest winds 5 to 15 knots becoming west. sunny.
.tonight...southwest winds 5 to 10 knots. a chance of showers
after midnight. 
.sunday...southwest winds 5 to 10 knots. showers likely in the
morning, then showers with a chance of thunderstorms in the
afternoon. 
.sunday night...southwest winds 5 to 10 knots becoming west.
showers with a chance of thunderstorms in the evening, then a
chance of showers overnight. 
.monday...southwest winds 5 to 15 knots diminishing to less than
10 knots. a chance of showers during the day. 
.tuesday...southwest winds 5 to 10 knots 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
402 am edt sat jun 13 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 
through sunday morning, then a cold front will cross 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.


loz062-131500-
lake ontario open waters from the niagara river to hamlin beach-
402 am edt sat jun 13 2026

.today...southwest winds 10 to 15 knots. waves 1 to 2 feet. 
.tonight...southwest winds 15 to 20 knots diminishing to 10 to
15 knots. waves 1 to 3 feet building to 2 to 4 feet, then
subsiding to 1 to 3 feet. 
.sunday...southwest winds 5 to 10 knots becoming west. showers
with a chance of thunderstorms. waves 1 to 2 feet. 
.sunday night...northwest winds 10 to 15 knots becoming west
15 to 20 knots. showers in the evening. waves 1 to 3 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 15 knots becoming south. a chance
of showers tuesday night. waves 2 feet or less. 
.wednesday...south winds 15 to 20 knots. a chance of showers
during the day, then showers likely wednesday night. waves 1 to
3 feet. 

winds and waves higher in and near thunderstorms.

$$

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open lake forecast for lake ontario
national weather service buffalo ny
402 am edt sat jun 13 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 
through sunday morning, then a cold front will cross 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>065-131500-
lake ontario open waters from hamlin beach to the saint lawrence
river-
402 am edt sat jun 13 2026

.today...west winds 15 to 20 knots becoming southwest 10 to
15 knots. waves 1 to 3 feet. 
.tonight...southwest winds 10 to 15 knots becoming south. waves
1 to 2 feet. 
.sunday...south winds 5 to 10 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 2 feet building to
3 to 5 feet. 
.monday...west winds 15 to 20 knots becoming southwest 5 to
15 knots. waves 3 to 5 feet subsiding to 1 to 3 feet. 
.tuesday...southwest winds 5 to 15 knots becoming south. waves
2 feet or less. 
.wednesday...south winds 15 to 20 knots. a chance of showers
during the day, then showers likely wednesday night. waves 1 to
3 feet. 

winds and waves higher in and near thunderstorms.

$$