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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
527 am edt thu may 28 2026


slz022-024-281515-
saint lawrence river from cape vincent to saint regis
527 am edt thu may 28 2026

.today...north winds 5 to 15 knots becoming northwest. a chance
of showers early. 
.tonight...northwest winds 10 knots or less becoming west. partly
cloudy through the early overnight, then becoming mostly cloudy. 
.friday...west winds 10 knots or less increasing to 15 to
20 knots. showers in the afternoon. 
.friday night...northwest winds 15 to 20 knots becoming north.
showers in the evening, then showers likely overnight. 
.saturday...northeast winds 15 to 20 knots becoming southwest and
diminishing to 10 knots or less. a chance of showers during the
day. 
.sunday...southwest winds less than 10 knots. a chance of
showers. 
.monday...north winds less than 10 knots. a chance of showers. 

$$

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open lake forecast for lake ontario
national weather service buffalo ny
403 am edt thu may 28 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 30.3 inch high over ontario will expand southeastward 
across the great lakes today and tonight, before settling into the 
ohio valley friday. a 29.6 inch low will then make its way 
southeastward across quebec friday and new england friday night, 
with its trailing cold front crossing the lake late friday or friday 
night. another 30.2 inch high will then build across the great lakes 
and ohio valley later saturday through sunday, with a 29.8 inch low 
forecast to push south across new england sunday night and monday.


loz063>065-281500-
lake ontario open waters from hamlin beach to the saint lawrence
river-
403 am edt thu may 28 2026

.today...north winds 5 to 15 knots becoming west. a chance of
showers early. waves 2 feet or less. 
.tonight...west winds 5 to 10 knots. waves 2 feet or less. 
.friday...west winds 10 to 15 knots increasing to 15 to 20 knots.
a chance of showers in the afternoon. waves 1 to 3 feet building
to 3 to 6 feet. 
.friday night...northwest winds 15 to 20 knots becoming north. a
chance of showers. waves 3 to 6 feet. 
.saturday...north winds 15 to 20 knots becoming west 5 to
15 knots. waves 3 to 5 feet subsiding to 1 foot or less. 
.sunday...west winds 5 to 15 knots becoming northwest. waves 1 to
3 feet. 
.monday...northwest winds 5 to 10 knots. waves 2 feet or less. 

$$