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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
1003 am edt mon may 11 2026


slz022-024-112100-
saint lawrence river from cape vincent to saint regis
1003 am edt mon may 11 2026

.this afternoon...west winds 5 to 10 knots. a chance of showers
this afternoon. 
.tonight...west winds less than 10 knots. becoming mainly clear. 
.tuesday...light and variable winds becoming west 5 to 10 knots.
sunny.
.tuesday night...southwest winds 5 to 10 knots becoming
southeast. a chance of showers overnight. 
.wednesday...southeast winds 5 to 15 knots becoming south.
showers.
.thursday...southwest winds 10 knots or less becoming northwest.
showers likely. 
.friday...northwest winds 10 knots or less becoming southwest.
mostly cloudy. 

$$

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open lake forecast for lake ontario
national weather service buffalo ny
1002 am edt mon may 11 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 30.4 inch high will build from the upper great 
lakes today to the lower great lakes by tuesday before drifting off 
the east coast tuesday night. a 29.7 inch low will then move from 
the central great lakes tuesday night to the lower great lakes 
wednesday before drifting to the eastern seaboard thursday. this low 
will remain over the gulf of maine through friday before moving into 
the canadian maritimes saturday.


loz062-112100-
lake ontario open waters from the niagara river to hamlin beach-
1002 am edt mon may 11 2026

.rest of today...west winds 5 to 10 knots. waves 1 foot or less. 
.tonight...west winds 5 to 10 knots becoming northwest. waves
1 foot or less. 
.tuesday...north winds 10 knots or less becoming northeast. waves
1 foot or less. 
.tuesday night...southeast winds 5 to 15 knots. showers. waves
1 to 3 feet. 
.wednesday...south winds 10 to 15 knots becoming west. showers.
waves 1 to 3 feet. 
.thursday...northwest winds 5 to 10 knots. a chance of showers
during the day. waves 1 to 2 feet. 
.friday...west winds 5 to 10 knots becoming southwest. waves
1 foot or less. 

$$

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open lake forecast for lake ontario
national weather service buffalo ny
1002 am edt mon may 11 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 30.4 inch high will build from the upper great 
lakes today to the lower great lakes by tuesday before drifting off 
the east coast tuesday night. a 29.7 inch low will then move from 
the central great lakes tuesday night to the lower great lakes 
wednesday before drifting to the eastern seaboard thursday. this low 
will remain over the gulf of maine through friday before moving into 
the canadian maritimes saturday.


loz063>065-112100-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1002 am edt mon may 11 2026

.rest of today...west winds 5 to 15 knots. a chance of showers
late this morning. waves 2 feet or less. 
.tonight...west winds 5 to 10 knots becoming north. waves 2 feet
or less. 
.tuesday...north winds 10 knots or less. waves 1 foot or less. 
.tuesday night...east winds 10 knots or less becoming southeast
and increasing to 15 to 20 knots overnight. showers overnight.
waves 1 foot or less building to 1 to 3 feet. 
.wednesday...southeast winds 15 to 25 knots becoming southwest
and diminishing to 5 to 15 knots. showers. waves 3 to 5 feet
subsiding to 1 to 3 feet. 
.thursday...west winds 5 to 10 knots becoming northwest. a chance
of showers during the day. waves 2 feet or less. 
.friday...northwest winds 5 to 10 knots becoming southwest. waves
1 foot or less. 

$$

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open lake forecast for lake erie
national weather service cleveland oh
1007 am edt mon may 11 2026

for waters beyond five nautical miles of shore on lake erie

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...
high pressure 30.20 inches will persist across the region through
tonight. low pressure 29.90 inches will move east through the 
lower great lakes late tuesday into wednesday, extending a cold
front across the area late wednesday. high pressure 30.10 inches
will build into the region thursday into friday.


lez061-168-169-112015-
ripley to buffalo ny extending from 5nm off shoreline to us-
canadian border-geneva-on-the-
lake to conneaut oh beyond 5 nm off shoreline to us-
canadian border-
conneaut oh to ripley ny beyond 5 nm off shoreline to us-
canadian border-
1007 am edt mon may 11 2026

.this afternoon...north winds 10 knots or less becoming west.
waves 1 foot or less. 
.tonight...northwest winds 10 knots or less becoming northeast.
waves 1 foot or less. 
.tuesday...light and variable winds. waves 1 foot or less. 
.tuesday night...southeast winds 5 to 15 knots becoming south
15 to 20 knots. showers likely in the evening, then showers
overnight. waves 1 to 3 feet building to 2 to 4 feet. 
.wednesday...southwest winds 15 to 20 knots becoming west 10 to
15 knots. showers likely during the day, then a chance of showers
wednesday night. waves 3 to 5 feet subsiding to 2 to 4 feet. 
.thursday...northwest winds 5 to 15 knots. waves 1 to 3 feet
subsiding to 1 foot or less. 
.friday...west winds 10 knots or less becoming south. a chance of
showers friday night. waves 1 foot or less. 

$$