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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
402 am edt sat jun 6 2026


slz022-024-061500-
saint lawrence river from cape vincent to saint regis
403 am edt sat jun 6 2026

.today...south winds 5 to 15 knots becoming southwest. showers
early, then showers likely late this morning. showers likely with
a chance of thunderstorms this afternoon. 
.tonight...southwest winds 5 to 15 knots becoming west. showers
with a chance of thunderstorms early, then showers likely late in
the evening. a chance of showers after midnight. 
.sunday...northwest winds 5 to 10 knots becoming north. a chance
of showers. 
.sunday night...north winds less than 10 knots. partly cloudy in
the evening, then becoming mainly clear. 
.monday...light and variable winds. mainly clear. 
.tuesday...light and variable winds. clear, then becoming partly
cloudy. 
.wednesday...south winds less than 10 knots. a chance of showers
and thunderstorms. 

winds and waves higher in and near thunderstorms.

$$

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open lake forecast for lake ontario
national weather service buffalo ny
402 am edt sat jun 6 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 weak cold front will move south across the lower great 
lakes through tonight. a 30.2 inch high over quebec sunday will 
build southeast into new england monday, then remain near or just 
off the east coast through wednesday.


loz062-061500-
lake ontario open waters from the niagara river to hamlin beach-
402 am edt sat jun 6 2026

.today...southwest winds 15 to 20 knots becoming west. showers
likely early, then a chance of showers late this morning. a
chance of showers and thunderstorms this afternoon. waves 1 to
3 feet building to 3 to 5 feet. 
.tonight...west winds 5 to 15 knots. waves 2 to 4 feet subsiding
to 1 to 3 feet. 
.sunday...northwest winds 5 to 10 knots becoming west. waves
2 feet or less. 
.sunday night...west winds 10 knots or less becoming east. waves
1 foot or less. 
.monday...east winds 5 to 15 knots. waves 2 feet or less. 
.tuesday...east winds 10 knots or less becoming southeast. a
chance of showers and thunderstorms tuesday night. waves 1 foot
or less. 
.wednesday...south winds 10 knots or less becoming southwest. a
chance of showers and thunderstorms during the day, then a chance
of showers wednesday night. waves 1 foot or less. 

winds and waves higher in and near thunderstorms.

$$

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open lake forecast for lake ontario
national weather service buffalo ny
402 am edt sat jun 6 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 weak cold front will move south across the lower great 
lakes through tonight. a 30.2 inch high over quebec sunday will 
build southeast into new england monday, then remain near or just 
off the east coast through wednesday.


loz063>065-061500-
lake ontario open waters from hamlin beach to the saint lawrence
river-
402 am edt sat jun 6 2026

.today...south winds 10 to 15 knots becoming west 15 to 20 knots.
showers likely early, then a chance of showers late this morning.
a chance of showers and thunderstorms this afternoon. waves 1 to
3 feet building to 3 to 5 feet. 
.tonight...west winds 15 to 20 knots diminishing to 10 to
15 knots. a chance of showers and thunderstorms early. waves 3 to
5 feet subsiding to 1 to 3 feet. 
.sunday...west winds 5 to 15 knots. waves 1 to 3 feet. 
.sunday night...northwest winds 10 knots or less becoming
northeast. waves 2 feet or less. 
.monday...northeast winds 10 knots or less becoming southeast.
waves 1 foot or less. 
.tuesday...southeast winds 10 knots or less becoming south. a
chance of showers tuesday night. waves 1 foot or less. 
.wednesday...south winds 10 knots or less becoming southwest. a
chance of showers and thunderstorms. waves 1 foot or less. 

winds and waves higher in and near thunderstorms.

$$