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open lake forecast for lake ontario
national weather service buffalo ny
1002 am edt mon oct 5 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 over the upper midwest will build 
across the great lakes through tuesday, before sliding into the 
northeast wednesday. a cold front will then pass across the lake 
thursday. a 30.1 inch surface high will then ridge north across the 
lake friday.


loz063>065-052100-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1002 am edt mon oct 5 2026

.rest of today...west winds to 30 knots becoming northwest. a
chance of showers late this morning. waves 7 to 10 feet. waves
occasionally around 13 feet. 
.tonight...northwest winds 15 to 25 knots. waves 5 to 9 feet
subsiding to 3 to 5 feet. waves occasionally around 11 feet. 
.tuesday...northwest winds 5 to 15 knots becoming west. waves
2 to 4 feet subsiding to 1 to 3 feet. 
.tuesday night...west winds 5 to 15 knots becoming south 15 to
20 knots. waves 1 to 3 feet building to 2 to 4 feet. 
.wednesday...south winds 15 to 25 knots becoming west and
diminishing to 10 to 15 knots. a chance of showers wednesday
night. waves 3 to 5 feet subsiding to 2 to 4 feet. 
.thursday...west winds 15 to 20 knots. a chance of showers. waves
3 to 5 feet subsiding to 2 to 4 feet. 
.friday...west winds 10 to 15 knots. a chance of showers. waves
2 to 4 feet subsiding to 1 to 3 feet. 

$$

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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
1003 am edt mon oct 5 2026


slz022-024-052100-
saint lawrence river from cape vincent to saint regis
1003 am edt mon oct 5 2026

.rest of today...west winds 10 to 15 knots becoming northwest
15 to 20 knots. a chance of showers late this morning. 
.tonight...northwest winds 10 to 15 knots becoming west. mostly
cloudy early, then clearing. 
.tuesday...west winds 5 to 10 knots. sunny.
.tuesday night...southwest winds 10 knots or less becoming south
10 to 15 knots. mainly clear in the evening, then becoming partly
cloudy. 
.wednesday...south winds 10 to 15 knots becoming southwest 5 to
10 knots. a chance of showers. 
.thursday...southwest winds 5 to 15 knots becoming west. showers
likely. 
.friday...west winds 10 knots or less. a chance of showers. 

$$