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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
403 am edt thu jul 9 2026


slz022-024-091500-
saint lawrence river from cape vincent to saint regis
403 am edt thu jul 9 2026

.today...southwest winds 10 knots or less becoming north. a
chance of showers late this morning. showers with a chance of
thunderstorms this afternoon. 
.tonight...northeast winds 5 to 10 knots becoming light and
variable. showers with a chance of thunderstorms through the
early overnight, then a chance of showers late. 
.friday...light and variable winds. partly to mostly sunny. 
.friday night...north winds less than 10 knots. mainly clear in
the evening, then becoming partly cloudy. 
.saturday...northeast winds less than 10 knots. mainly clear. 
.sunday...light and variable winds. mainly clear. 
.monday...southwest winds 5 to 10 knots. mainly clear, then
becoming partly cloudy. 

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 thu jul 9 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 30.0 inch high will move off the mid atlantic 
coast today, giving way to a weak cold front that will cross the 
lake tonight through early friday. another 30.0 inch high will then 
build across the upper great lakes friday and the lower great lakes 
over the weekend, before drifting off the new england coast monday.


loz062-091500-
lake ontario open waters from the niagara river to hamlin beach-
402 am edt thu jul 9 2026

.today...southwest winds 5 to 10 knots becoming northwest and
increasing to 15 to 20 knots. a chance of showers and
thunderstorms early this afternoon. showers with a chance of
thunderstorms late. waves 2 feet or less. 
.tonight...west winds 5 to 15 knots becoming northwest 10 knots
or less. showers with a chance of thunderstorms early, then a
chance of showers and thunderstorms late in the evening. a chance
of showers after midnight. waves 2 feet or less. 
.friday...north winds less than 10 knots. waves 1 foot or less. 
.friday night...northwest winds 10 knots or less becoming
northeast. waves 1 foot or less. 
.saturday...northeast winds 10 knots or less. waves 1 foot or
less. 
.sunday...northeast winds less than 10 knots becoming south.
waves 1 foot or less. 
.monday...southwest winds 10 knots or less increasing to 10 to
15 knots. waves 2 feet or less. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kbuf 090802
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open lake forecast for lake ontario
national weather service buffalo ny
402 am edt thu jul 9 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 30.0 inch high will move off the mid atlantic 
coast today, giving way to a weak cold front that will cross the 
lake tonight through early friday. another 30.0 inch high will then 
build across the upper great lakes friday and the lower great lakes 
over the weekend, before drifting off the new england coast monday.


loz063>065-091500-
lake ontario open waters from hamlin beach to the saint lawrence
river-
402 am edt thu jul 9 2026

.today...southwest winds 5 to 15 knots becoming northwest. a
chance of showers and thunderstorms late. waves 1 foot or less. 
.tonight...northwest winds 5 to 15 knots. a chance of showers and
thunderstorms in the evening, then a chance of showers after
midnight. waves 2 feet or less. 
.friday...northwest winds 10 knots or less. a chance of showers
in the morning. waves 1 foot or less. 
.friday night...northwest winds 10 knots or less becoming
northeast. waves 1 foot or less. 
.saturday...northeast winds 10 knots or less. waves 2 feet or
less. 
.sunday...northeast winds 10 knots or less becoming south. waves
1 foot or less. 
.monday...southwest winds 5 to 15 knots. waves 2 feet or less. 

winds and waves higher in and near thunderstorms.

$$