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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
1011 am edt thu apr 2 2026


slz022-024-022100-
saint lawrence river from cape vincent to saint regis
1011 am edt thu apr 2 2026

.this afternoon...northeast winds 5 to 15 knots. a chance of rain
showers early. rain showers likely late. 
.tonight...east winds 10 to 15 knots becoming south 15 to
20 knots. rain showers. 
.friday...south winds 15 to 20 knots becoming southwest. showers.
.friday night...west winds 15 to 20 knots becoming north and
diminishing to less than 10 knots overnight. partly to mostly
cloudy. 
.saturday...northeast winds 5 to 15 knots becoming south. rain
showers likely during the day, then rain showers saturday night. 
.sunday...southwest winds 15 to 20 knots becoming west 10 to
15 knots. rain showers during the day. 
.monday...northwest winds 5 to 15 knots. mostly cloudy. 

$$

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open lake forecast for lake ontario
national weather service buffalo ny
1010 am edt thu apr 2 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 30.7 inch high will build east across quebec today. a 
29.6 inch low will move across the central great lakes tonight and 
to southern quebec friday afternoon, while lifting a warm front 
northward across the lake tonight. a 29.4 inch surface low will 
track through the central great lakes saturday, then into quebec 
saturday night and sunday, while dragging a cold front across the 
lake saturday night, with a secondary cold front then following 
sunday night and monday. a 30.5 inch high will then build across the 
great lakes tuesday and tuesday night, before sliding east and off 
the new england coast wednesday.


loz062-022100-
lake ontario open waters from the niagara river to hamlin beach-
1010 am edt thu apr 2 2026

.rest of today...east winds 20 to 25 knots. a chance of rain
showers late this morning, then rain showers likely this
afternoon. waves 5 to 8 feet. waves occasionally around 10 feet. 
.tonight...east winds 15 to 20 knots becoming southwest. a chance
of rain showers in the evening, then rain showers after midnight.
waves 4 to 7 feet subsiding to 3 to 5 feet. waves occasionally
around 9 feet. 
.friday...south winds 15 to 25 knots becoming west. a chance of
showers in the morning. waves 3 to 6 feet building to 4 to
7 feet. waves occasionally around 9 feet. 
.friday night...west winds 15 to 20 knots becoming northeast 5 to
15 knots. waves 3 to 6 feet subsiding to 1 to 3 feet. 
.saturday...east winds 15 to 20 knots becoming southwest. rain
showers. waves 2 to 4 feet building to 3 to 5 feet. 
.sunday...west winds 20 to 25 knots. rain showers likely during
the day. waves 5 to 8 feet. waves occasionally around 10 feet. 
.monday...west winds 15 to 25 knots becoming north 15 to
20 knots. waves 4 to 7 feet subsiding to 1 to 3 feet. waves
occasionally around 9 feet. 

$$

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open lake forecast for lake ontario
national weather service buffalo ny
1010 am edt thu apr 2 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 30.7 inch high will build east across quebec today. a 
29.6 inch low will move across the central great lakes tonight and 
to southern quebec friday afternoon, while lifting a warm front 
northward across the lake tonight. a 29.4 inch surface low will 
track through the central great lakes saturday, then into quebec 
saturday night and sunday, while dragging a cold front across the 
lake saturday night, with a secondary cold front then following 
sunday night and monday. a 30.5 inch high will then build across the 
great lakes tuesday and tuesday night, before sliding east and off 
the new england coast wednesday.


loz063>065-022100-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1010 am edt thu apr 2 2026

.rest of today...east winds 15 to 20 knots. rain showers likely
this afternoon. waves 3 to 6 feet. 
.tonight...east winds 15 to 25 knots becoming south to 30 knots.
a chance of showers through the early overnight, then showers
likely late. waves 3 to 5 feet building to 5 to 8 feet. waves
occasionally around 10 feet. 
.friday...south winds to 30 knots becoming southwest. showers
likely in the morning, then a chance of showers in the afternoon.
waves 5 to 8 feet subsiding to 3 to 6 feet. waves occasionally
around 10 feet. 
.friday night...west winds 15 to 20 knots becoming north 5 to
15 knots. waves 3 to 6 feet subsiding to 1 to 3 feet. 
.saturday...northeast winds 10 to 15 knots becoming southwest and
increasing to 15 to 25 knots. rain showers likely during the day,
then rain showers with a chance of thunderstorms saturday night.
waves 1 to 3 feet building to 3 to 6 feet. 
.sunday...west winds to 30 knots. rain showers during the day.
waves 4 to 7 feet building to 6 to 10 feet. waves occasionally
around 13 feet. 
.monday...west winds 15 to 25 knots becoming north. waves 6 to
9 feet subsiding to 2 to 4 feet. waves occasionally around
11 feet. 

winds and waves higher in and near thunderstorms.

$$

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open lake forecast for lake erie
national weather service cleveland oh
1012 am edt thu apr 2 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 warm front will lift north across lake erie tonight, and then
settle back south as a stationary front near the lake friday. 
the front will lift north again on saturday ahead of low pressure
deepening to 29.60 inches as it tracks through the upper great
lakes. this low will extend a cold front east across lake erie 
saturday night, followed by weak high pressure 30.20 inches on 
monday.


lez061-167>169-022015-
ripley to buffalo ny extending from 5nm off shoreline to us-
canadian border-willowick to geneva-on-the-
lake oh beyond 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-
1012 am edt thu apr 2 2026

.rest of today...northeast winds 15 to 20 knots becoming east
10 to 15 knots. rain showers likely late this morning, then a
chance of rain showers early this afternoon. a slight chance of
rain showers and thunderstorms late. waves 3 to 5 feet subsiding
to 2 to 4 feet. 
.tonight...east winds 10 to 15 knots becoming south and
increasing to 15 to 25 knots. a slight chance of showers and
thunderstorms in the evening, then a chance of showers with a
slight chance of thunderstorms after midnight. showers likely
with a slight chance of thunderstorms late. waves 1 to 3 feet
building to 3 to 5 feet. 
.friday...southwest winds 15 to 20 knots becoming west. a chance
of showers. waves 3 to 5 feet. 
.friday night...west winds 5 to 15 knots becoming northeast. a
chance of rain showers and thunderstorms in the evening, then a
chance of rain showers overnight. waves 2 to 4 feet subsiding to
1 to 3 feet. 
.saturday...east winds 10 to 15 knots becoming southwest 15 to
20 knots. rain showers. waves 1 to 2 feet building to 3 to
5 feet. 
.sunday...west winds 15 to 25 knots. waves 3 to 6 feet building
to 4 to 7 feet, then subsiding to 2 to 4 feet. waves occasionally
around 9 feet. 
.monday...west winds 10 to 15 knots becoming north 15 to
20 knots. a chance of rain showers monday night. waves 1 to
3 feet. 

winds and waves higher in and near thunderstorms.

$$