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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
1003 pm edt thu aug 27 2026


slz022-024-280900-
saint lawrence river from cape vincent to saint regis
1003 pm edt thu aug 27 2026

.overnight...southwest winds 10 knots or less becoming
northwest. partly cloudy, then becoming mostly cloudy. 
.friday...northwest winds less than 10 knots. mostly cloudy
early, then becoming mostly sunny. 
.friday night...light and variable winds. mainly clear. 
.saturday...light and variable winds becoming southwest 5 to
10 knots. sunny.
.saturday night...southwest winds 10 knots or less. mainly clear
in the evening, then becoming mostly cloudy. 
.sunday...southwest winds 5 to 10 knots becoming light and
variable. a chance of showers during the day, then showers likely
sunday night. 
.monday...east winds less than 10 knots becoming northeast.
showers likely during the day, then a chance of showers monday
night. 
.tuesday...east winds less than 10 knots becoming southeast. a
chance of showers. 

$$

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open lake forecast for lake ontario
national weather service buffalo ny
1002 pm edt thu aug 27 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 will cross the lower great lakes 
tonight. a 30.2 inch high will then build from the upper great lakes 
friday to the lower great lakes saturday before drifting off the new 
england coast sunday. a weak frontal boundary is then forecast to 
stall just north of the lake sunday night through tuesday.


loz062-280900-
lake ontario open waters from the niagara river to hamlin beach-
1002 pm edt thu aug 27 2026

.overnight...northwest winds around 10 knots. waves 1 to
2 feet. 
.friday...north winds 10 knots or less becoming south. waves
2 feet or less. 
.friday night...light and variable winds. waves 1 foot or less. 
.saturday...light and variable winds becoming southwest 5 to
10 knots. waves 1 foot or less. 
.saturday night...south winds 5 to 10 knots becoming southwest.
waves 1 foot or less. 
.sunday...southwest winds 5 to 10 knots. showers likely with a
chance of thunderstorms sunday night. waves 1 foot or less. 
.monday...southwest winds 5 to 10 knots becoming southeast.
showers likely with a chance of thunderstorms during the day,
then a chance of showers and thunderstorms monday night. waves
1 foot or less. 
.tuesday...southeast winds 5 to 10 knots becoming southwest. a
chance of showers. waves 1 to 2 feet. 

winds and waves higher in and near thunderstorms.

$$

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open lake forecast for lake ontario
national weather service buffalo ny
1002 pm edt thu aug 27 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 will cross the lower great lakes 
tonight. a 30.2 inch high will then build from the upper great lakes 
friday to the lower great lakes saturday before drifting off the new 
england coast sunday. a weak frontal boundary is then forecast to 
stall just north of the lake sunday night through tuesday.


loz063>065-280900-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1002 pm edt thu aug 27 2026

.overnight...west winds 5 to 10 knots becoming northwest.
waves 1 to 2 feet. 
.friday...north winds 10 knots or less becoming northwest. waves
2 feet or less. 
.friday night...west winds less than 10 knots. waves 1 foot or
less. 
.saturday...west winds 10 knots or less becoming southwest. waves
1 foot or less. 
.saturday night...southwest winds 5 to 15 knots. waves 2 feet or
less. 
.sunday...southwest winds 5 to 10 knots becoming south. showers
likely sunday night. waves 2 feet or less. 
.monday...south winds 5 to 10 knots becoming east. showers likely
with a chance of thunderstorms during the day, then a chance of
showers and thunderstorms monday night. waves 1 foot or less. 
.tuesday...east winds 5 to 10 knots becoming southwest. a chance
of showers during the day, then showers likely tuesday night.
waves 1 foot or less. 

winds and waves higher in and near thunderstorms.

$$