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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
404 pm edt wed jun 3 2026


slz022-024-040300-
saint lawrence river from cape vincent to saint regis
404 pm edt wed jun 3 2026

.tonight...southwest winds 10 knots or less. mainly clear. 
.thursday...southwest winds 5 to 10 knots. sunny.
.thursday night...southwest winds 10 knots or less. partly cloudy
in the evening, then becoming mostly cloudy. 
.friday...southwest winds 5 to 10 knots. partly sunny. 
.friday night...southwest winds 5 to 10 knots. showers likely
overnight. 
.saturday...southwest winds 10 knots or less becoming north.
showers with a chance of thunderstorms. 
.sunday...northeast winds 10 knots or less. a chance of showers
during the day. 
.monday...northeast winds less than 10 knots. mainly clear. 

winds and waves higher in and near thunderstorms.

$$

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open lake forecast for lake ontario
national weather service buffalo ny
403 pm edt wed jun 3 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 30.4 inch high will expand to the ohio valley and 
eastern seaboard through thursday. this high will then drift off the 
southeast coast friday. a weak cold front will settle south across 
the lower great lakes saturday through saturday night. high pressure 
averaging 30.4 inches will build southeast into the region starting 
early monday and center near or just east of the lake through 
wednesday.


loz062-040300-
lake ontario open waters from the niagara river to hamlin beach-
403 pm edt wed jun 3 2026

.tonight...southwest winds 5 to 10 knots. waves 1 foot or less. 
.thursday...southwest winds 5 to 15 knots. waves 2 feet or less. 
.thursday night...southwest winds 5 to 15 knots. waves 1 to
3 feet. 
.friday...southwest winds 5 to 15 knots increasing to 15 to
20 knots. waves 1 to 3 feet building to 2 to 4 feet. 
.friday night...southwest winds 15 to 20 knots. showers likely
overnight. waves 2 to 4 feet. 
.saturday...southwest winds 15 to 20 knots becoming northwest
5 to 15 knots. showers with a chance of thunderstorms. waves 1 to
3 feet. 
.sunday...north winds 5 to 10 knots becoming northeast. a chance
of showers during the day. waves 2 feet or less. 
.monday...east winds 5 to 15 knots. waves 1 to 3 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kbuf 032003
glflo 
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open lake forecast for lake ontario
national weather service buffalo ny
403 pm edt wed jun 3 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 30.4 inch high will expand to the ohio valley and 
eastern seaboard through thursday. this high will then drift off the 
southeast coast friday. a weak cold front will settle south across 
the lower great lakes saturday through saturday night. high pressure 
averaging 30.4 inches will build southeast into the region starting 
early monday and center near or just east of the lake through 
wednesday.


loz063>065-040300-
lake ontario open waters from hamlin beach to the saint lawrence
river-
403 pm edt wed jun 3 2026

.tonight...west winds 5 to 10 knots becoming southwest. waves
1 to 2 feet. 
.thursday...southwest winds 5 to 10 knots. waves 2 feet or less. 
.thursday night...southwest winds 5 to 10 knots. waves 2 feet or
less. 
.friday...southwest winds 5 to 15 knots. waves 2 feet or less. 
.friday night...southwest winds 10 to 15 knots. a chance of
showers overnight. waves 1 to 3 feet. 
.saturday...southwest winds 5 to 15 knots becoming northwest.
showers likely. waves 1 to 3 feet. 
.sunday...north winds 5 to 15 knots becoming east. a chance of
showers during the day. waves 2 feet or less. 
.monday...east winds 5 to 10 knots becoming southeast. waves
2 feet or less. 

winds and waves higher in and near thunderstorms.

$$