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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
1010 am edt thu mar 26 2026


slz022-024-262100-
saint lawrence river from cape vincent to saint regis
1010 am edt thu mar 26 2026

.this afternoon...southwest winds 5 to 10 knots becoming west. a
chance of rain showers early. rain late. 
.tonight...northwest winds 5 to 15 knots becoming north. rain
early, then a chance of rain and snow showers. 
.friday...north winds 5 to 15 knots. sunny.
.friday night...north winds 10 knots or less. partly cloudy. 
.saturday...northwest winds 10 knots or less becoming southwest.
a chance of snow showers saturday night. 
.sunday...southwest winds 5 to 10 knots becoming south. a chance
of snow showers during the day. 
.monday...southwest winds 5 to 15 knots becoming north. a chance
of rain showers during the day. 

$$

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open lake forecast for lake ontario
national weather service buffalo ny
1009 am edt thu mar 26 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 29.7 inch low will move east across quebec today 
before reaching the canadian maritimes by friday morning while 
deepening to 29.4 inches. a trailing cold front will move south 
across the lake late this afternoon. a strong 30.6 inch high will 
then build from the northern plains friday afternoon to the ohio 
valley saturday afternoon and then off the mid atlantic coast 
sunday. a 30.0 inch trough will sag southward across eastern canada 
monday, then move across the eastern great lakes monday night.


loz062-262100-
lake ontario open waters from the niagara river to hamlin beach-
1009 am edt thu mar 26 2026

.this afternoon...west winds 5 to 15 knots becoming north. rain
this afternoon. waves 1 to 2 feet. 
.tonight...north winds 5 to 15 knots increasing to 15 to
20 knots. rain in the evening. waves 1 to 2 feet building to 3 to
5 feet. 
.friday...north winds 15 to 20 knots becoming northeast 5 to
15 knots. waves 2 to 4 feet subsiding to 1 to 3 feet. 
.friday night...north winds 10 to 15 knots becoming northwest.
waves 1 to 3 feet. 
.saturday...northwest winds 10 to 15 knots becoming west. waves
1 to 2 feet building to 3 to 5 feet, then subsiding to 2 to
4 feet. 
.sunday...southwest winds 10 to 15 knots increasing to 15 to
20 knots. waves 1 to 3 feet building to 2 to 4 feet. 
.monday...southwest winds 15 to 20 knots becoming north. a chance
of rain showers monday night. waves 3 to 5 feet subsiding to 2 to
4 feet. 

$$

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open lake forecast for lake ontario
national weather service buffalo ny
1009 am edt thu mar 26 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 29.7 inch low will move east across quebec today 
before reaching the canadian maritimes by friday morning while 
deepening to 29.4 inches. a trailing cold front will move south 
across the lake late this afternoon. a strong 30.6 inch high will 
then build from the northern plains friday afternoon to the ohio 
valley saturday afternoon and then off the mid atlantic coast 
sunday. a 30.0 inch trough will sag southward across eastern canada 
monday, then move across the eastern great lakes monday night.


loz063-064-262100-
lake ontario open waters from hamlin beach to mexico bay-
1009 am edt thu mar 26 2026

.this afternoon...west winds 5 to 15 knots becoming northwest.
rain. waves 1 to 2 feet. 
.tonight...north winds 5 to 15 knots increasing to 15 to
20 knots. rain in the evening, then a chance of rain showers
after midnight. waves 1 to 2 feet building to 3 to 6 feet. 
.friday...north winds 15 to 20 knots diminishing to 10 to
15 knots. waves 3 to 6 feet subsiding to 1 to 3 feet. 
.friday night...north winds 10 to 15 knots. waves 1 to 3 feet. 
.saturday...northwest winds 10 to 15 knots becoming west. waves
1 to 3 feet building to 3 to 5 feet. 
.sunday...southwest winds 5 to 15 knots becoming south 15 to
20 knots. waves 1 to 3 feet building to 3 to 5 feet. 
.monday...southwest winds 15 to 20 knots becoming north. a chance
of rain showers monday night. waves 3 to 5 feet subsiding to 2 to
4 feet. 

$$

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open lake forecast for lake ontario
national weather service buffalo ny
1009 am edt thu mar 26 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 29.7 inch low will move east across quebec today 
before reaching the canadian maritimes by friday morning while 
deepening to 29.4 inches. a trailing cold front will move south 
across the lake late this afternoon. a strong 30.6 inch high will 
then build from the northern plains friday afternoon to the ohio 
valley saturday afternoon and then off the mid atlantic coast 
sunday. a 30.0 inch trough will sag southward across eastern canada 
monday, then move across the eastern great lakes monday night.


loz065-262100-
lake ontario open waters from mexico bay to the saint lawrence
river-
1009 am edt thu mar 26 2026

.this afternoon...southwest winds 5 to 15 knots. rain.
waves 2 feet or less. 
.tonight...northeast winds 5 to 15 knots becoming north 15 to
20 knots. rain in the evening, then a chance of rain and snow
showers after midnight. waves 1 to 3 feet building to 2 to
4 feet. 
.friday...north winds 15 to 20 knots diminishing to 10 to
15 knots. waves 2 to 4 feet subsiding to 1 to 3 feet. 
.friday night...north winds 10 to 15 knots. waves 2 feet or less.
.saturday...northwest winds 5 to 10 knots becoming west 10 to
15 knots. a chance of snow showers saturday night. waves 1 foot
or less building to 3 to 5 feet. 
.sunday...southwest winds 5 to 15 knots becoming south 15 to
20 knots. a chance of snow showers during the day. waves 1 to
3 feet building to 3 to 5 feet. 
.monday...south winds 15 to 20 knots becoming north. a chance of
rain and snow showers monday night. waves 3 to 5 feet subsiding
to 2 to 4 feet. 

$$