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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
1012 pm edt thu apr 9 2026


slz022-024-100900-
saint lawrence river from cape vincent to saint regis
1012 pm edt thu apr 9 2026

.overnight...southwest winds 5 to 15 knots becoming west
less than 10 knots. mostly cloudy. 
.friday...northwest winds 10 knots or less becoming north. a
chance of rain showers early, then rain showers from late morning
on. 
.friday night...northwest winds less than 10 knots. a chance of
rain showers. 
.saturday...northwest winds 5 to 10 knots. mostly sunny. 
.saturday night...west winds 5 to 10 knots becoming light and
variable. mainly clear. 
.sunday...south winds 10 knots or less becoming southwest and
increasing to 15 to 20 knots. a chance of rain showers during the
day, then rain showers sunday night. 
.monday...southwest winds 15 to 20 knots diminishing to 5 to
15 knots. showers.
.tuesday...southwest winds 5 to 10 knots becoming northeast.
showers likely. 

$$

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open lake forecast for lake ontario
national weather service buffalo ny
1011 pm edt thu apr 9 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 29.5 inch low will move east of james bay tonight and 
across northern quebec, with a trailing cold front crossing the lake 
tonight through tomorrow. a 30.5 inch high is then forecast to build 
into the central great lakes region saturday, then drift east to new 
england by sunday. a cold front from a 29.4 inch low near james bay 
will cross the lake monday, and then stall south of the lake before 
slowly lifting northward later tuesday as a warm front.


loz062-100900-
lake ontario open waters from the niagara river to hamlin beach-
1011 pm edt thu apr 9 2026

.overnight...west winds 5 to 15 knots becoming north. a
chance of rain showers late. waves 1 to 3 feet. 
.friday...northeast winds 5 to 10 knots becoming northwest. a
chance of rain showers early, then rain showers from late morning
on. waves around 1 foot. 
.friday night...northwest winds 5 to 15 knots. a chance of rain
showers in the evening. waves 1 to 2 feet. 
.saturday...northwest winds 5 to 10 knots becoming southwest.
waves 2 feet or less. 
.saturday night...southwest winds 10 knots or less becoming
southeast. waves 1 foot or less. 
.sunday...southeast winds 5 to 10 knots becoming southwest and
increasing to 15 to 25 knots. a chance of rain showers. waves
1 foot or less building to 4 to 7 feet. waves occasionally around
9 feet. 
.monday...southwest winds to 30 knots diminishing to 15 to
20 knots. a chance of showers. waves 5 to 8 feet subsiding to
3 to 5 feet. waves occasionally around 10 feet. 
.tuesday...southwest winds 15 to 20 knots. a chance of showers
during the day, then showers likely tuesday night. waves 2 to
4 feet. 

$$

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open lake forecast for lake ontario
national weather service buffalo ny
1011 pm edt thu apr 9 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 29.5 inch low will move east of james bay tonight and 
across northern quebec, with a trailing cold front crossing the lake 
tonight through tomorrow. a 30.5 inch high is then forecast to build 
into the central great lakes region saturday, then drift east to new 
england by sunday. a cold front from a 29.4 inch low near james bay 
will cross the lake monday, and then stall south of the lake before 
slowly lifting northward later tuesday as a warm front.


loz063>065-100900-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1011 pm edt thu apr 9 2026

.overnight...south winds 15 to 20 knots becoming west and
diminishing to 5 to 10 knots. waves 2 to 4 feet subsiding to 1 to
3 feet. 
.friday...north winds 5 to 10 knots becoming northwest. rain
showers likely early, then a chance of rain showers late in the
morning. rain showers in the afternoon. waves 1 to 2 feet. 
.friday night...northwest winds 5 to 15 knots. a chance of rain
showers. waves 1 to 3 feet. 
.saturday...northwest winds 10 to 15 knots becoming west. waves
1 to 3 feet. 
.saturday night...west winds 10 knots or less becoming southeast.
waves 2 feet or less. 
.sunday...southeast winds 5 to 15 knots becoming south and
increasing to 30 knots. a chance of rain showers. waves 2 feet or
less building to 5 to 8 feet. waves occasionally around 10 feet. 
.monday...southwest winds 15 to 25 knots. showers likely. waves
5 to 8 feet subsiding to 3 to 5 feet. waves occasionally around
10 feet. 
.tuesday...southwest winds 10 to 15 knots increasing to 15 to
20 knots. a chance of showers during the day, then showers likely
tuesday night. waves 2 to 4 feet subsiding to 1 to 3 feet. 

$$

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open lake forecast for lake erie
national weather service cleveland oh
342 am edt fri apr 10 2026

for waters beyond five nautical miles of shore on lake erie

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 southeast across lake erie today and exit
to the southeast by tonight. high pressure 30.60 inches will build
over the great lakes saturday before exiting east on sunday. a 
warm front will lift northeast across the lake sunday and stall to
the north of lake erie monday through the middle of the week.


lez061-168-169-101415-
ripley to buffalo ny extending from 5nm off shoreline to us-
canadian border-geneva-on-the-
lake to conneaut oh beyond 5 nm off shoreline to us-
canadian border-
conneaut oh to ripley ny beyond 5 nm off shoreline to us-
canadian border-
342 am edt fri apr 10 2026

.today...southeast winds 5 to 10 knots becoming west. a slight
chance of showers late this morning. showers this afternoon.
waves 1 to 2 feet. 
.tonight...northwest winds 10 knots or less becoming north. a
chance of rain showers early, then a slight chance of rain
showers late in the evening. waves 1 to 2 feet. 
.saturday...north winds 10 knots or less becoming southwest.
waves 1 foot or less. 
.saturday night...light and variable winds. waves 1 foot or less.
.sunday...southeast winds 5 to 10 knots becoming southwest and
increasing to 15 to 20 knots. a chance of rain showers. waves
1 foot or less building to 3 to 5 feet. 
.monday...southwest winds 15 to 20 knots diminishing to 10 to
15 knots. a chance of showers. waves 3 to 6 feet subsiding to
2 to 3 feet. 
.tuesday...southwest winds 10 to 15 knots becoming south. a
chance of showers during the day, then showers likely tuesday
night. waves 1 to 3 feet. 

winds and waves higher in and near thunderstorms.

$$