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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
1004 am edt thu jun 4 2026


slz022-024-042100-
saint lawrence river from cape vincent to saint regis
1004 am edt thu jun 4 2026

.this afternoon...southwest winds 5 to 15 knots. mostly sunny. 
.tonight...southwest winds 10 knots or less. partly to 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 west.
showers with a chance of thunderstorms. 
.sunday...north winds 10 knots or less becoming northeast. 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
1003 am edt thu jun 4 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 extend from the ohio valley to 
the eastern seaboard today. this high will drift off the southeast 
coast friday. a weak cold front will settle south across the lower 
great lakes saturday through saturday night. another 30.4 inch high 
will build southeast into the region monday and center near or just 
east of the lake through wednesday.


loz062-042100-
lake ontario open waters from the niagara river to hamlin beach-
1003 am edt thu jun 4 2026

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

winds and waves higher in and near thunderstorms.

$$

fzus61 kbuf 041403
glflo 
expires:202606042100;;169415

open lake forecast for lake ontario
national weather service buffalo ny
1003 am edt thu jun 4 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 extend from the ohio valley to 
the eastern seaboard today. this high will drift off the southeast 
coast friday. a weak cold front will settle south across the lower 
great lakes saturday through saturday night. another 30.4 inch high 
will build southeast into the region monday and center near or just 
east of the lake through wednesday.


loz063>065-042100-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1003 am edt thu jun 4 2026

.this afternoon...southwest winds 5 to 15 knots becoming west.
waves 2 feet or less. 
.tonight...southwest winds 5 to 15 knots. waves 2 feet or less. 
.friday...southwest winds 5 to 10 knots. waves 1 foot or less. 
.friday night...southwest winds 5 to 15 knots becoming south. a
chance of showers overnight. waves 2 feet or less. 
.saturday...southwest winds 15 to 20 knots becoming west 10 to
15 knots. showers with a chance of thunderstorms. waves 2 to
4 feet subsiding to 1 to 3 feet. 
.sunday...northwest winds 5 to 10 knots becoming northeast. 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.

$$