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open lake forecast for lake ontario
national weather service buffalo ny
402 am edt sat jun 21 2025

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 over the mid-atlantic and extending northward 
across the lake this morning will retreating east of the lake today. 
meanwhile a complex of thunderstorms may dive southeastward near or 
across the lake tonight, the 30.2 inch surface high will remain 
anchored over the east coast sunday through wednesday.


loz063>065-211500-
lake ontario open waters from hamlin beach to the saint lawrence
river-
402 am edt sat jun 21 2025

.today...south winds 10 knots or less becoming southeast. waves
1 foot or less. 
.tonight...southeast winds 5 to 15 knots becoming southwest and
increasing to 15 to 25 knots. a chance of showers and
thunderstorms after midnight. waves 2 feet or less building to
3 to 6 feet. 
.sunday...southwest winds 15 to 20 knots becoming west 10 to
15 knots. a chance of showers and thunderstorms in the morning.
waves 3 to 6 feet. 
.sunday night...southwest winds 10 to 15 knots. waves 2 to 4 feet
subsiding to 1 to 3 feet. 
.monday...southwest winds 10 to 15 knots. waves 1 to 3 feet
building to 2 to 4 feet, then subsiding to 1 to 3 feet. 
.tuesday...west winds 5 to 15 knots becoming northwest. waves
1 to 3 feet. 
.wednesday...northeast winds 5 to 10 knots. a chance of showers
and thunderstorms. waves 2 feet or less. 

winds and waves higher in and near thunderstorms.

$$

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expires:202506211500;;116147

forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
402 am edt sat jun 21 2025


slz022-024-211500-
saint lawrence river from cape vincent to saint regis
402 am edt sat jun 21 2025

.today...light and variable winds becoming southwest 5 to
10 knots. mostly sunny through early afternoon, then becoming
partly sunny. 
.tonight...south winds 5 to 15 knots becoming southwest. a chance
of showers and thunderstorms in the evening, then showers and
thunderstorms likely after midnight. 
.sunday...southwest winds 5 to 15 knots. a chance of showers and
thunderstorms. 
.sunday night...southwest winds 10 knots or less. a chance of
showers and thunderstorms in the evening. 
.monday...southwest winds 5 to 10 knots. mainly clear. 
.tuesday...southwest winds 10 knots or less becoming north. a
chance of showers and thunderstorms. 
.wednesday...northeast winds less than 10 knots. a chance of
showers wednesday night. 

winds and waves higher in and near thunderstorms.

$$