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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
1002 pm edt wed aug 26 2026


slz022-024-270900-
saint lawrence river from cape vincent to saint regis
1002 pm edt wed aug 26 2026

.overnight...southeast winds 5 to 15 knots becoming south.
partly cloudy. 
.thursday...south winds 10 to 15 knots becoming southwest. a
chance of showers late in the morning. a chance of showers and
thunderstorms in the afternoon. 
.thursday night...southwest winds 5 to 10 knots becoming
northwest. a chance of showers and thunderstorms in the evening. 
.friday...northwest winds less than 10 knots. mostly cloudy in
the morning, then becoming mostly sunny. 
.friday night...northwest winds less than 10 knots. mainly clear.
.saturday...southwest winds 10 knots or less. mainly clear, then
becoming partly cloudy. 
.sunday...southwest winds 10 knots or less. a chance of showers. 
.monday...east winds less than 10 knots becoming southeast. a
chance of showers. 

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 wed aug 26 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 30.1 inch high will drift off the new england coast 
through tonight. a cold front will then cross the lower great lakes 
from west to east thursday. another 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.


loz062-270900-
lake ontario open waters from the niagara river to hamlin beach-
1002 pm edt wed aug 26 2026

.overnight...southeast winds 5 to 15 knots becoming south.
a chance of showers late. waves 1 to 2 feet. 
.thursday...southwest winds 15 to 20 knots diminishing to 10 to
15 knots. showers likely early, then a chance of showers late in
the morning. a chance of showers and thunderstorms early in the
afternoon. waves 1 to 3 feet. 
.thursday night...west winds 10 to 15 knots becoming northwest.
waves 1 to 3 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...southwest winds 10 knots or less. waves 1 foot or
less. 
.sunday...southwest winds 5 to 10 knots. a chance of showers
sunday night. waves 2 feet or less. 
.monday...southwest winds 5 to 10 knots becoming south. 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 wed aug 26 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 30.1 inch high will drift off the new england coast 
through tonight. a cold front will then cross the lower great lakes 
from west to east thursday. another 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.


loz063>065-270900-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1002 pm edt wed aug 26 2026

.overnight...southeast winds 10 to 15 knots becoming south
15 to 20 knots. waves 1 to 3 feet building to 2 to 4 feet. 
.thursday...south winds 15 to 20 knots becoming west 10 to
15 knots. showers likely with a chance of thunderstorms. waves
2 to 4 feet subsiding to 1 to 3 feet. 
.thursday night...west winds 10 to 15 knots becoming northwest. a
chance of showers and thunderstorms in the evening. waves 1 to
3 feet. 
.friday...northwest winds 5 to 10 knots. waves 2 feet or less. 
.friday night...west winds 10 knots or less becoming southwest.
waves 1 foot or less. 
.saturday...southwest winds 10 knots or less becoming south.
waves 1 foot or less. 
.sunday...southwest winds 5 to 15 knots. a chance of showers
sunday night. waves 2 feet or less. 
.monday...southwest winds 5 to 10 knots becoming south. a chance
of showers. waves 2 feet 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
935 pm edt wed aug 26 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...
low pressure of 29.70 inches will pass north of the great lakes 
tonight and pull a cold front east across lake erie thursday. 
high pressure of 30.10 inches will build into the great lakes 
friday before settling to the mid-atlantic region sunday. a warm
front will move north across lake erie sunday night ahead of low
pressure approaching the western great lakes.


lez061-169-270830-
ripley to buffalo ny extending from 5nm off shoreline to us-
canadian border-
conneaut oh to ripley ny beyond 5 nm off shoreline to us-
canadian border-
935 pm edt wed aug 26 2026

.rest of tonight...south winds 10 to 15 knots becoming southwest
15 to 20 knots. a chance of showers and thunderstorms after
midnight. a chance of waterspouts late. waves 1 to 3 feet. 
.thursday...southwest winds 15 to 20 knots becoming west 10 to
15 knots. a chance of waterspouts in the morning. a chance of
showers with a slight chance of thunderstorms in the morning,
then a slight chance of showers and thunderstorms early in the
afternoon. waves 1 to 3 feet building to 2 to 4 feet. 
.thursday night...west winds 5 to 15 knots becoming north. a
chance of waterspouts overnight. a chance of showers overnight.
waves 1 to 3 feet. 
.friday...north winds 10 knots or less. waves 1 foot or less. 
.friday night...north winds 10 knots or less becoming southeast.
waves 1 foot or less. 
.saturday...south winds 10 knots or less. waves 1 foot or less. 
.sunday...southwest winds 5 to 15 knots. a chance of showers
sunday night. waves 2 feet or less. 
.monday...southwest winds 5 to 15 knots. a chance of showers
monday night. waves 1 to 2 feet. 

winds and waves higher in and near thunderstorms.

$$