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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
1003 pm edt mon jul 6 2026


slz022-024-070900-
saint lawrence river from cape vincent to saint regis
1003 pm edt mon jul 6 2026

.overnight...light and variable winds. mostly cloudy, then
becoming partly cloudy. 
.tuesday...east winds less than 10 knots. sunny.
.tuesday night...east winds less than 10 knots. partly cloudy. 
.wednesday...southwest winds 10 knots or less. mostly sunny. 
.wednesday night...southwest winds less than 10 knots. partly
cloudy. 
.thursday...southwest winds 10 knots or less. showers likely with
a chance of thunderstorms. 
.friday...west winds less than 10 knots becoming north. showers
likely with a chance of thunderstorms during the day, then a
chance of showers and thunderstorms friday night. 
.saturday...north winds less than 10 knots. mainly clear. 

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 mon jul 6 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 will build from southern quebec across 
new england tonight, then east of the canadian maritimes by tuesday. 
meanwhile, a weak 29.9 inch low over the virginias this evening will 
move to the mid atlantic coastline tonight, and then move off the 
southern new england coast tuesday. a broad 30.1 inch high is then 
forecast to build across the great lakes tuesday through wednesday, 
then drift off the east coast thursday. a weak cold front will cross 
the lake friday before another 30.1 inch high builds across the 
upper great lakes friday and the lower great lakes by saturday.


loz062-070900-
lake ontario open waters from the niagara river to hamlin beach-
1002 pm edt mon jul 6 2026

.overnight...east winds 10 to 15 knots. waves 2 to 3 feet. 
.tuesday...east winds 10 to 15 knots. waves 1 to 3 feet. 
.tuesday night...east winds 10 knots or less. waves 2 feet or
less. 
.wednesday...light and variable winds. waves 1 foot or less. 
.wednesday night...southeast winds 10 knots or less becoming
southwest. waves 1 foot or less. 
.thursday...southwest winds 5 to 15 knots becoming west. a chance
of showers during the day, then showers likely with a chance of
thunderstorms thursday night. waves 2 feet or less. 
.friday...west winds 5 to 10 knots becoming north. a chance of
showers and thunderstorms during the day. waves 2 feet or less. 
.saturday...northeast winds 10 knots or less becoming east. 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
1002 pm edt mon jul 6 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 will build from southern quebec across 
new england tonight, then east of the canadian maritimes by tuesday. 
meanwhile, a weak 29.9 inch low over the virginias this evening will 
move to the mid atlantic coastline tonight, and then move off the 
southern new england coast tuesday. a broad 30.1 inch high is then 
forecast to build across the great lakes tuesday through wednesday, 
then drift off the east coast thursday. a weak cold front will cross 
the lake friday before another 30.1 inch high builds across the 
upper great lakes friday and the lower great lakes by saturday.


loz063>065-070900-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1002 pm edt mon jul 6 2026

.overnight...east winds 5 to 10 knots. waves 2 feet or
less. 
.tuesday...east winds 5 to 10 knots becoming northeast. waves
2 feet or less. 
.tuesday night...east winds 10 knots or less becoming southeast.
waves 1 foot or less. 
.wednesday...south winds 10 knots or less becoming north. waves
1 foot or less. 
.wednesday night...south winds 10 knots or less becoming
southwest. waves 1 foot or less. 
.thursday...southwest winds 5 to 10 knots becoming west. showers
likely with a chance of thunderstorms thursday night. waves
2 feet or less. 
.friday...west winds 5 to 10 knots becoming north. showers likely
with a chance of thunderstorms during the day. waves 2 feet or
less. 
.saturday...north winds 10 knots or less becoming east. waves
1 foot or less. 

winds and waves higher in and near thunderstorms.

$$

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open lake forecast for lake erie
national weather service cleveland oh
341 am edt tue jul 7 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...
a weak trough averaging 29.90 inches will linger near lake erie 
today. weak high pressure 30.00 inches will build in wednesday 
into thursday. a cold front will cross the lake on friday before 
high pressure 30.00 inches returns on saturday.


lez061-168-169-071415-
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-
341 am edt tue jul 7 2026

.today...northeast winds 5 to 10 knots. waves 1 foot or less. 
.tonight...northeast winds 10 knots or less. waves 1 foot or
less. 
.wednesday...east winds less than 10 knots. waves 1 foot or less.
.wednesday night...light and variable winds becoming south 5 to
10 knots. waves 1 foot or less. 
.thursday...southwest winds 5 to 10 knots. showers with a chance
of thunderstorms thursday night. waves 2 feet or less. 
.friday...west winds 5 to 10 knots becoming northeast. showers
likely with a chance of thunderstorms during the day. waves 1 to
2 feet. 
.saturday...northeast winds 5 to 10 knots becoming southeast.
waves 1 foot or less. 

winds and waves higher in and near thunderstorms.

$$