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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
1010 pm edt sun mar 22 2026


slz022-024-230900-
saint lawrence river from cape vincent to saint regis
1010 pm edt sun mar 22 2026

.overnight...northeast winds 5 to 10 knots. cloudy.
.monday...northeast winds 5 to 10 knots becoming northwest.
mostly cloudy. 
.monday night...northwest winds 10 knots or less. mostly cloudy
in the evening, then clearing. 
.tuesday...west winds 10 knots or less becoming southwest 10 to
15 knots. sunny in the morning, then becoming partly sunny. 
.tuesday night...southwest winds 5 to 10 knots. a chance of snow
showers overnight. 
.wednesday...southwest winds 5 to 10 knots becoming northeast. a
chance of rain and snow showers. 
.thursday...northeast winds 5 to 10 knots becoming northwest.
rain and snow showers likely. 
.friday...northwest winds 5 to 10 knots. a chance of rain and
snow showers during the day. 

$$

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open lake forecast for lake ontario
national weather service buffalo ny
1009 pm edt sun mar 22 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 cold front will move south and away from the lower 
great lakes tonight. a 30.4 inch high will then build across lower 
michigan monday, and the mid-atlantic states tuesday. a 29.8 inch 
low tracking across quebec will then push its associated cold front 
across the lake late wednesday, with another 29.6 inch low then 
developing across the central great lakes or the ohio valley 
late thursday and moving off the southern new england coast friday.


loz062-230900-
lake ontario open waters from the niagara river to hamlin beach-
1009 pm edt sun mar 22 2026

.overnight...northeast winds 15 to 20 knots diminishing to
10 to 15 knots. waves 2 to 4 feet. 
.monday...north winds 10 to 15 knots becoming northwest 15 to
20 knots. a chance of snow showers in the afternoon. waves 2 to
4 feet. 
.monday night...northwest winds 15 to 20 knots diminishing to
5 to 15 knots. waves 2 to 4 feet subsiding to 1 to 3 feet. 
.tuesday...west winds 5 to 15 knots becoming southwest 15 to
20 knots. waves 1 to 3 feet. 
.tuesday night...southwest winds 10 to 15 knots. waves 1 to
3 feet. 
.wednesday...southwest winds 10 to 15 knots becoming east. a
chance of rain and snow showers wednesday night. waves 1 to
3 feet. 
.thursday...east winds 15 to 25 knots becoming northwest. a
chance of rain and snow showers during the day, then a chance of
rain showers thursday night. waves 2 to 4 feet building to 5 to
7 feet. waves occasionally around 9 feet. 
.friday...northwest winds 15 to 25 knots. waves 4 to 7 feet
subsiding to 3 to 5 feet. waves occasionally around 9 feet. 

$$

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open lake forecast for lake ontario
national weather service buffalo ny
1009 pm edt sun mar 22 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 cold front will move south and away from the lower 
great lakes tonight. a 30.4 inch high will then build across lower 
michigan monday, and the mid-atlantic states tuesday. a 29.8 inch 
low tracking across quebec will then push its associated cold front 
across the lake late wednesday, with another 29.6 inch low then 
developing across the central great lakes or the ohio valley 
late thursday and moving off the southern new england coast friday.


loz063-064-230900-
lake ontario open waters from hamlin beach to mexico bay-
1009 pm edt sun mar 22 2026

.overnight...northeast winds 15 to 20 knots. waves 3 to
5 feet. 
.monday...north winds 15 to 20 knots becoming northwest 10 to
15 knots. waves 3 to 5 feet subsiding to 1 to 3 feet. 
.monday night...northwest winds 15 to 20 knots diminishing to
10 to 15 knots. a chance of snow showers in the evening. waves
1 to 3 feet building to 2 to 4 feet, then subsiding to 1 to
3 feet. 
.tuesday...northwest winds 5 to 15 knots becoming west. waves
2 feet or less. 
.tuesday night...west winds 5 to 15 knots becoming southwest.
waves 1 to 2 feet. 
.wednesday...southwest winds 10 to 15 knots becoming east. a
chance of rain and snow showers wednesday night. waves 1 to
3 feet. 
.thursday...east winds 15 to 25 knots becoming northwest. a
chance of rain and snow showers during the day, then rain showers
likely with a chance of snow showers thursday night. waves 2 to
4 feet building to 5 to 8 feet. waves occasionally around
10 feet. 
.friday...north winds 15 to 25 knots becoming northwest. a chance
of rain and snow showers during the day. waves 5 to 8 feet
subsiding to 3 to 6 feet. waves occasionally around 10 feet. 

$$

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open lake forecast for lake ontario
national weather service buffalo ny
1009 pm edt sun mar 22 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 cold front will move south and away from the lower 
great lakes tonight. a 30.4 inch high will then build across lower 
michigan monday, and the mid-atlantic states tuesday. a 29.8 inch 
low tracking across quebec will then push its associated cold front 
across the lake late wednesday, with another 29.6 inch low then 
developing across the central great lakes or the ohio valley 
late thursday and moving off the southern new england coast friday.


loz065-230900-
lake ontario open waters from mexico bay to the saint lawrence
river-
1009 pm edt sun mar 22 2026

.overnight...northeast winds 15 to 20 knots. waves 1 to
3 feet building to 2 to 4 feet. 
.monday...north winds 15 to 20 knots becoming northwest 10 to
15 knots. waves 2 to 4 feet subsiding to 1 to 3 feet. 
.monday night...northwest winds 10 to 15 knots becoming north.
waves 2 feet or less. 
.tuesday...northwest winds 10 knots or less becoming southwest
10 to 15 knots. waves 2 feet or less. 
.tuesday night...southwest winds 5 to 10 knots. waves 2 feet or
less. 
.wednesday...south winds 10 to 15 knots becoming northeast. a
chance of rain and snow showers wednesday night. waves 1 to
3 feet. 
.thursday...east winds 10 to 15 knots becoming northwest and
increasing to 15 to 25 knots. a chance of rain and snow showers
during the day, then rain and snow showers likely thursday night.
waves 1 to 3 feet building to 4 to 7 feet. waves occasionally
around 9 feet. 
.friday...north winds 15 to 25 knots. a chance of rain and snow
showers during the day. waves 3 to 6 feet subsiding to 1 to
3 feet. 

$$