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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
1003 pm edt fri sep 4 2026


slz022-024-050900-
saint lawrence river from cape vincent to saint regis
1003 pm edt fri sep 4 2026

.overnight...light and variable winds. patchy fog.

.saturday...north winds 10 knots or less becoming northeast. a
chance of showers late. 
.saturday night...northeast winds 5 to 10 knots. becoming mainly
clear. 
.sunday...northeast winds 5 to 10 knots becoming north. sunny.
.sunday night...north winds less than 10 knots. patchy fog
overnight. 
.monday...light and variable winds. patchy fog during the day. 
.tuesday...northwest winds 10 knots or less becoming southeast. a
chance of showers tuesday night. 
.wednesday...south winds 10 to 15 knots becoming southwest 15 to
20 knots. showers likely. 

$$

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open lake forecast for lake ontario
national weather service buffalo ny
1002 pm edt fri sep 4 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 30.1 inches builds gradually from 
northern ontario through monday. during monday night, a cold front 
will sweep southward across lake ontario. behind the front, another 
ridge averaging 30.1 inches builds from near james bay through 
tuesday. on wednesday, the ridge should exit southeastward and allow 
a warm front to sweep northeastward across lake ontario.


loz062-050900-
lake ontario open waters from the niagara river to hamlin beach-
1002 pm edt fri sep 4 2026

.overnight...north winds 5 to 10 knots becoming northeast.
waves 1 foot or less. 
.saturday...northeast winds around 10 knots becoming light and
variable. waves 1 foot or less. 
.saturday night...light and variable winds becoming northeast
around 10 knots. waves 2 feet or less. 
.sunday...northeast winds 5 to 15 knots becoming east. waves 1 to
2 feet. 
.sunday night...southeast winds less than 10 knots. waves 1 foot
or less. 
.monday...light and variable winds. waves 1 foot or less. 
.tuesday...east winds 10 knots or less becoming southeast. a
chance of showers tuesday night. waves 1 foot or less. 
.wednesday...south winds 15 to 25 knots becoming west. showers
likely during the day, then a chance of showers wednesday night.
waves 1 to 3 feet building to 3 to 6 feet. 

$$

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open lake forecast for lake ontario
national weather service buffalo ny
1002 pm edt fri sep 4 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 30.1 inches builds gradually from 
northern ontario through monday. during monday night, a cold front 
will sweep southward across lake ontario. behind the front, another 
ridge averaging 30.1 inches builds from near james bay through 
tuesday. on wednesday, the ridge should exit southeastward and allow 
a warm front to sweep northeastward across lake ontario.


loz063>065-050900-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1002 pm edt fri sep 4 2026

.overnight...north winds 5 to 10 knots. waves 1 foot or
less. 
.saturday...north winds 5 to 10 knots. waves 1 foot or less. 
.saturday night...north winds 10 to 15 knots becoming northeast.
waves 1 to 3 feet. 
.sunday...northeast winds 5 to 15 knots. waves 1 to 3 feet. 
.sunday night...northeast winds 10 knots or less becoming
northwest. waves 2 feet or less. 
.monday...northwest winds 10 knots or less becoming west. waves
1 foot or less. 
.tuesday...north winds 5 to 15 knots becoming southeast. waves
2 feet or less. 
.wednesday...south winds 15 to 25 knots becoming west. showers
likely. waves 1 to 3 feet building to 3 to 6 feet. 

$$

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open lake forecast for lake erie
national weather service cleveland oh
1032 pm edt fri sep 4 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 frontal boundary located south of lake erie will continue to
move south away from the area tonight. high pressure 30.20 inches
builds into the great lakes region over the weekend through early
next week.


lez061-168-169-050830-
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-
1032 pm edt fri sep 4 2026

.rest of tonight...north winds 10 knots or less becoming
northeast. a slight chance of showers late this evening. waves
1 foot or less. 
.saturday...northeast winds 5 to 10 knots. waves 1 to 3 feet. 
.saturday night...northeast winds 5 to 10 knots. waves 1 to
3 feet. 
.sunday...northeast winds 5 to 15 knots. waves 1 to 3 feet. 
.sunday night...northeast winds 5 to 15 knots becoming east.
waves 1 to 3 feet subsiding to 1 foot or less. 
.monday...east winds 10 knots or less becoming southeast. waves
1 foot or less. 
.tuesday...southeast winds 10 knots or less becoming south 10 to
15 knots. waves 2 feet or less. 
.wednesday...southwest winds 15 to 25 knots becoming west. a
chance of showers. waves 1 to 3 feet building to 3 to 5 feet. 

winds and waves higher in and near thunderstorms.

$$