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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
404 pm edt mon mar 23 2026


slz022-024-240300-
saint lawrence river from cape vincent to saint regis
404 pm edt mon mar 23 2026

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

$$

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open lake forecast for lake ontario
national weather service buffalo ny
403 pm edt mon mar 23 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 drift from southern lower 
michigan tonight to the mid-atlantic states by late tuesday before 
drifting off the east coast wednesday. a weak 29.7 inch low over the 
central great lakes early thursday will move to the canadian 
maritimes by early friday, with a trailing cold front crossing the 
lake thursday night.


loz062-240300-
lake ontario open waters from the niagara river to hamlin beach-
403 pm edt mon mar 23 2026

.tonight...northwest winds 15 to 20 knots diminishing to 5 to
10 knots. waves 3 to 5 feet subsiding to 1 to 3 feet. 
.tuesday...northwest winds 5 to 10 knots becoming southwest and
increasing to 15 to 20 knots. waves 1 to 3 feet building to 2 to
4 feet. 
.tuesday night...southwest winds 15 to 20 knots diminishing to
5 to 15 knots. waves 2 to 4 feet subsiding to 1 to 3 feet. 
.wednesday...south winds 5 to 15 knots becoming southeast. waves
1 to 2 feet. 
.wednesday night...east winds 10 to 15 knots becoming south. a
chance of rain showers. waves 1 to 2 feet. 
.thursday...southwest winds 10 to 15 knots becoming northwest
15 to 20 knots. a chance of rain showers during the day, then
rain showers likely thursday night. waves 1 to 3 feet building to
4 to 6 feet. 
.friday...north winds 15 to 20 knots becoming northwest. waves
3 to 5 feet subsiding to 2 to 4 feet. 
.saturday...west winds 15 to 20 knots. waves 3 to 6 feet building
to 4 to 7 feet. waves occasionally around 9 feet. 

$$

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open lake forecast for lake ontario
national weather service buffalo ny
403 pm edt mon mar 23 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 drift from southern lower 
michigan tonight to the mid-atlantic states by late tuesday before 
drifting off the east coast wednesday. a weak 29.7 inch low over the 
central great lakes early thursday will move to the canadian 
maritimes by early friday, with a trailing cold front crossing the 
lake thursday night.


loz063-064-240300-
lake ontario open waters from hamlin beach to mexico bay-
403 pm edt mon mar 23 2026

.tonight...northwest winds 15 to 20 knots diminishing to 10 to
15 knots. a chance of snow showers early. waves 2 to 4 feet
building to 3 to 5 feet, then subsiding to 2 to 4 feet. 
.tuesday...northwest winds 5 to 15 knots becoming west. waves
1 to 3 feet. 
.tuesday night...west winds 10 to 15 knots becoming southwest.
waves 1 to 3 feet. 
.wednesday...south winds 5 to 10 knots becoming southeast. waves
1 to 2 feet. 
.wednesday night...southeast winds around 10 knots becoming
south. a chance of rain showers. waves 1 to 2 feet. 
.thursday...southwest winds 10 to 15 knots becoming northwest and
increasing to 15 to 25 knots. a chance of rain showers during the
day, then rain showers likely with a chance of snow showers
thursday night. waves 1 to 2 feet building to 4 to 7 feet. waves
occasionally around 9 feet. 
.friday...north winds 15 to 25 knots becoming northwest. a chance
of rain and snow showers during the day. waves 4 to 7 feet
subsiding to 3 to 5 feet. waves occasionally around 9 feet. 
.saturday...west winds 15 to 25 knots. waves 3 to 5 feet building
to 5 to 8 feet. waves occasionally around 10 feet. 

$$

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open lake forecast for lake ontario
national weather service buffalo ny
403 pm edt mon mar 23 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 drift from southern lower 
michigan tonight to the mid-atlantic states by late tuesday before 
drifting off the east coast wednesday. a weak 29.7 inch low over the 
central great lakes early thursday will move to the canadian 
maritimes by early friday, with a trailing cold front crossing the 
lake thursday night.


loz065-240300-
lake ontario open waters from mexico bay to the saint lawrence
river-
403 pm edt mon mar 23 2026

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

$$

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open lake forecast for lake erie
national weather service cleveland oh
342 pm edt mon mar 23 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 ridge averaging 30.40 inches will begin to build east across the
region tonight. the ridge will maintain influence over lake erie 
through tuesday before shifting east on wednesday. a strong cold 
front will move southeast across the lake late thursday with high 
pressure 30.40 inches building southeast into the region friday.


lez061-168-169-240215-
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 pm edt mon mar 23 2026

.tonight...northwest winds 15 to 25 knots becoming north and
diminishing to less than 10 knots after midnight. a slight chance
of snow showers early. waves 2 to 4 feet subsiding to 1 to
3 feet. 
.tuesday...light and variable winds becoming west 10 to 15 knots.
waves 2 feet or less. 
.tuesday night...southwest winds 10 knots or less becoming south.
waves 2 feet or less. 
.wednesday...south winds 5 to 10 knots. waves 1 foot or less. 
.wednesday night...south winds 5 to 10 knots becoming southwest.
waves 1 to 2 feet. 
.thursday...southwest winds 10 to 15 knots becoming north 15 to
20 knots. a chance of rain showers and thunderstorms during the
day, then rain likely, a chance of thunderstorms and snow
thursday night. waves 1 to 3 feet building to 2 to 4 feet. 
.friday...north winds 15 to 20 knots becoming northwest 5 to
15 knots. waves 3 to 5 feet subsiding to 1 to 3 feet. 
.saturday...west winds 10 to 15 knots. waves 1 to 3 feet. 

winds and waves higher in and near thunderstorms.

$$