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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
402 am edt fri aug 14 2026


slz022-024-141500-
saint lawrence river from cape vincent to saint regis
402 am edt fri aug 14 2026

.today...light and variable winds. areas of fog early. a chance
of showers late. 
.tonight...light and variable winds. areas of fog from late
evening on. 
.saturday...northeast winds less than 10 knots. areas of fog in
the morning. 
.saturday night...light and variable winds. mainly clear in the
evening, then becoming partly cloudy. 
.sunday...southeast winds less than 10 knots becoming west.
showers likely during the day, then showers likely with a chance
of thunderstorms sunday night. 
.monday...northwest winds less than 10 knots. mostly cloudy, then
clearing. 
.tuesday...light and variable winds becoming southwest 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
401 am edt fri aug 14 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 high pressure ridge averaging 30.2 inches builds from the canadian 
prairies before settling over lake ontario and vicinity by saturday. 
the ridge begins to exit eastward saturday night and a low of 29.7 
inches should move generally east-southeastward from near the 
northern great lakes to near the gulf of maine saturday night 
through monday. this low track should allow a warm front to sweep 
northeastward across lake ontario saturday night and especially on 
sunday before a cold front sweeps eastward across the lake sunday 
evening through sunday night. behind the cold front, a high pressure 
ridge averaging 30.0 inches should build slowly from the upper 
midwest through tuesday.


loz062-141500-
lake ontario open waters from the niagara river to hamlin beach-
401 am edt fri aug 14 2026

.today...north winds less than 10 knots. waves 1 foot or less. 
.tonight...east winds 10 knots or less. waves 1 foot or less. 
.saturday...east winds 5 to 10 knots. waves 1 to 2 feet. 
.saturday night...east winds 5 to 10 knots becoming southeast.
waves 1 to 2 feet. 
.sunday...southeast winds 5 to 10 knots becoming northwest.
showers likely with a chance of thunderstorms. waves 1 to 2 feet.
.monday...northwest winds 5 to 10 knots becoming north. waves
1 foot or less. 
.tuesday...northwest winds 10 knots or less becoming southwest.
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
401 am edt fri aug 14 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 high pressure ridge averaging 30.2 inches builds from the canadian 
prairies before settling over lake ontario and vicinity by saturday. 
the ridge begins to exit eastward saturday night and a low of 29.7 
inches should move generally east-southeastward from near the 
northern great lakes to near the gulf of maine saturday night 
through monday. this low track should allow a warm front to sweep 
northeastward across lake ontario saturday night and especially on 
sunday before a cold front sweeps eastward across the lake sunday 
evening through sunday night. behind the cold front, a high pressure 
ridge averaging 30.0 inches should build slowly from the upper 
midwest through tuesday.


loz063>065-141500-
lake ontario open waters from hamlin beach to the saint lawrence
river-
401 am edt fri aug 14 2026

.today...northeast winds 10 knots or less. a chance of showers
late. waves 1 foot or less. 
.tonight...northeast winds 10 knots or less becoming east. waves
1 foot or less. 
.saturday...east winds 5 to 10 knots becoming northeast. waves
1 foot or less. 
.saturday night...east winds 5 to 10 knots becoming southeast.
waves 2 feet or less. 
.sunday...southeast winds 5 to 15 knots becoming west. showers
likely with a chance of thunderstorms. waves 2 feet or less. 
.monday...northwest winds 5 to 15 knots becoming north. waves
2 feet or less. 
.tuesday...northwest winds 10 knots or less becoming southwest
10 to 15 knots. waves 1 foot or less. 

winds and waves higher in and near thunderstorms.

$$