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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
403 am edt sat aug 29 2026


slz022-024-291500-
saint lawrence river from cape vincent to saint regis
403 am edt sat aug 29 2026

.today...light and variable winds becoming southwest 10 to
15 knots. patchy fog early. 
.tonight...southwest winds 5 to 10 knots. a chance of showers
late. 
.sunday...southwest winds 5 to 10 knots. a chance of showers in
the morning, then showers likely in the afternoon. 
.sunday night...southwest winds 10 knots or less becoming north.
showers likely in the evening, then a chance of showers
overnight. 
.monday...northeast winds less than 10 knots becoming east. a
chance of showers monday night. 
.tuesday...east winds less than 10 knots becoming southeast. a
chance of showers during the day, then showers likely with a
chance of thunderstorms tuesday night. 
.wednesday...south winds 10 knots or less becoming southwest.
showers likely with a chance of 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 aug 29 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 30.2 inch high over the lower great lakes today will 
drift off the southern new england coast by sunday. a weak frontal 
boundary is then forecast to move south across the lake sunday night 
before stalling over or just south of the lake monday through 
tuesday. this front is then expected to move north of the lake 
tuesday night, followed by a cold front late wednesday.


loz062-291500-
lake ontario open waters from the niagara river to hamlin beach-
402 am edt sat aug 29 2026

.today...south winds 10 knots or less increasing to 10 to
15 knots. waves 2 feet or less. 
.tonight...southwest winds 5 to 15 knots. waves 2 feet or less. 
.sunday...southwest winds 5 to 10 knots. a chance of showers in
the afternoon. waves 1 foot or less. 
.sunday night...southwest winds 10 knots or less becoming
southeast. showers likely. waves 1 foot or less. 
.monday...east winds 5 to 10 knots. showers likely. waves 2 feet
or less. 
.tuesday...east winds 5 to 10 knots becoming southwest. showers
likely. waves 1 foot or less. 
.wednesday...southwest winds 5 to 10 knots becoming west. showers
likely with a chance of thunderstorms during the day, then a
chance of showers and thunderstorms wednesday night. waves 2 feet
or less. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kbuf 290802
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open lake forecast for lake ontario
national weather service buffalo ny
402 am edt sat aug 29 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 30.2 inch high over the lower great lakes today will 
drift off the southern new england coast by sunday. a weak frontal 
boundary is then forecast to move south across the lake sunday night 
before stalling over or just south of the lake monday through 
tuesday. this front is then expected to move north of the lake 
tuesday night, followed by a cold front late wednesday.


loz063>065-291500-
lake ontario open waters from hamlin beach to the saint lawrence
river-
402 am edt sat aug 29 2026

.today...southwest winds 5 to 10 knots becoming south. waves
2 feet or less. 
.tonight...south winds 5 to 15 knots becoming southwest. waves
2 feet or less. 
.sunday...southwest winds 5 to 15 knots. a chance of showers in
the afternoon. waves 2 feet or less. 
.sunday night...southwest winds 10 knots or less becoming south.
a chance of showers. waves 2 feet or less. 
.monday...east winds 5 to 10 knots. a chance of showers during
the day, then showers likely monday night. waves 1 foot or less. 
.tuesday...southeast winds 5 to 10 knots becoming south. showers
likely during the day, then showers likely with a chance of
thunderstorms tuesday night. waves 1 foot or less. 
.wednesday...south winds 5 to 10 knots becoming west. showers
likely with a chance of thunderstorms during the day, then a
chance of showers and thunderstorms wednesday night. waves 2 feet
or less. 

winds and waves higher in and near thunderstorms.

$$