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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
1005 am edt wed apr 22 2026


slz022-024-222100-
saint lawrence river from cape vincent to saint regis
1005 am edt wed apr 22 2026

.this afternoon...south winds less than 10 knots. partly to mostly
sunny. 
.tonight...light and variable winds. partly cloudy. 
.thursday...north winds 5 to 10 knots becoming northwest. mostly
sunny. 
.thursday night...northwest winds 10 knots or less becoming
north. partly cloudy. 
.friday...north winds 10 knots or less becoming east. mainly
clear. 
.saturday...northeast winds 10 knots or less becoming east.
partly to mostly cloudy. 
.sunday...northeast winds less than 10 knots. partly to mostly
cloudy. 

$$

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open lake forecast for lake ontario
national weather service buffalo ny
1004 am edt wed apr 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 30.1 inch high will build across the great lakes today 
and thursday. a warm front will approach the lake friday. a 29.7 
inch low will move southwest of the lake saturday, followed by a 
30.2 inch high building across the lower great lakes saturday night 
and sunday.


loz062-222100-
lake ontario open waters from the niagara river to hamlin beach-
1004 am edt wed apr 22 2026

.this afternoon...northwest winds less than 10 knots becoming
southwest. waves 1 foot or less. 
.tonight...west winds 10 knots or less becoming north. waves
1 foot or less. 
.thursday...north winds less than 10 knots becoming southeast.
waves 1 foot or less. 
.thursday night...east winds 10 knots or less increasing to 10 to
15 knots. waves 2 feet or less. 
.friday...east winds 15 to 20 knots. a chance of rain showers
friday night. waves 1 to 3 feet building to 2 to 4 feet. 
.saturday...east winds 15 to 20 knots becoming northeast 10 to
15 knots. a chance of showers. waves 3 to 6 feet subsiding to
2 to 3 feet. 
.sunday...northeast winds 5 to 15 knots becoming east. waves 1 to
3 feet subsiding to 1 foot or less. 

$$

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open lake forecast for lake ontario
national weather service buffalo ny
1004 am edt wed apr 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 30.1 inch high will build across the great lakes today 
and thursday. a warm front will approach the lake friday. a 29.7 
inch low will move southwest of the lake saturday, followed by a 
30.2 inch high building across the lower great lakes saturday night 
and sunday.


loz063>065-222100-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1004 am edt wed apr 22 2026

.this afternoon...south winds 10 knots or less becoming west.
waves 2 feet or less. 
.tonight...west winds 10 knots or less becoming north. waves
1 foot or less. 
.thursday...north winds 5 to 10 knots becoming southwest. waves
1 foot or less. 
.thursday night...southwest winds 10 knots or less becoming
northeast. waves 1 foot or less. 
.friday...northeast winds 5 to 15 knots becoming east. waves 1 to
3 feet. 
.saturday...east winds 15 to 20 knots becoming southeast 10 to
15 knots. a chance of showers. waves 2 to 4 feet subsiding to
1 to 3 feet. 
.sunday...west winds 5 to 15 knots becoming northeast 10 knots or
less. waves 2 feet or less. 

$$

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open lake forecast for lake erie
national weather service cleveland oh
948 am edt wed apr 22 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 weak cold front drifts southward across lake erie through this
early afternoon and should then move farther southward to mid ohio
by daybreak thursday. behind the front, a high pressure ridge 
averaging 30.10 inches builds from the north. on thursday, the 
ridge should exit eastward. simultaneously, the front should move
back north as a warm front and then stall near the southern shore
of lake erie. this front should remain near the southern 
lakeshore through friday and then be followed by the eastward 
passage of a cold front across ohio and western pennsylvania 
friday night into saturday as a low of 29.40 inches moves 
southeastward from the northwestern great lakes toward the mid- 
atlantic states. behind the low and front, a ridge averaging 30.10
inches should build from the north-central united states through 
this weekend. the ridge should begin to exit eastward this monday.


lez061-168-169-222030-
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-
948 am edt wed apr 22 2026

.this afternoon...west winds 5 to 10 knots becoming southwest.
waves 2 feet or less. 
.tonight...west winds 5 to 10 knots becoming light and variable.
waves 1 foot or less. 
.thursday...northeast winds less than 10 knots. waves 1 foot or
less. 
.thursday night...east winds 5 to 10 knots. waves 1 foot or less.
.friday...northeast winds 5 to 15 knots. showers likely friday
night. waves 1 to 3 feet. 
.saturday...northeast winds 5 to 10 knots. showers likely during
the day. waves 2 feet or less. 
.sunday...north winds 10 knots or less becoming east. waves
1 foot or less. 

winds and waves higher in and near thunderstorms.

$$