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open lake forecast for lake ontario
national weather service buffalo ny
402 am edt wed jun 10 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 29.8 inch low will track northeast into southeastern 
ontario this morning sending a warm front across the lake. another 
warm front will cross the lake thursday night in advance of a 29.7 
inch trough that will cross the lake later friday, which will also 
send an attendant cold front across the lake friday afternoon and 
evening. a 30.0 inch high will ridge across the lower great lakes 
friday night through sunday morning, before a cold front crosses the 
region later sunday or sunday night.


loz063>065-101500-
lake ontario open waters from hamlin beach to the saint lawrence
river-
402 am edt wed jun 10 2026

.today...south winds 10 to 15 knots becoming southeast. a chance
of showers early, then showers likely with a chance of
thunderstorms from late morning on. waves 2 feet or less. 
.tonight...southwest winds 5 to 15 knots. a chance of showers and
thunderstorms in the evening. a chance of showers late. waves
2 feet or less. 
.thursday...southwest winds 5 to 10 knots. showers likely in the
morning, then showers likely with a chance of thunderstorms in
the afternoon. waves 2 feet or less. 
.thursday night...west winds 10 knots or less becoming southwest.
a chance of showers in the evening. waves 2 feet or less. 
.friday...south winds 5 to 15 knots becoming west. showers with a
chance of thunderstorms. waves 1 foot or less building to 1 to
3 feet. 
.saturday...west winds 5 to 15 knots becoming southwest. waves
1 to 2 feet. 
.sunday...southwest winds 10 to 15 knots becoming west. a chance
of showers and thunderstorms. waves 1 to 3 feet. 

winds and waves higher in and near thunderstorms.

$$

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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
402 am edt wed jun 10 2026


slz022-024-101500-
saint lawrence river from cape vincent to saint regis
402 am edt wed jun 10 2026

.today...south winds 5 to 10 knots becoming southwest. a chance
of showers early, then showers with a chance of thunderstorms
from late morning on. 
.tonight...southwest winds 10 knots or less. showers likely with
a chance of thunderstorms through the early overnight. 
.thursday...southwest winds 10 knots or less. a chance of showers
in the afternoon. 
.thursday night...southwest winds less than 10 knots. a chance of
showers in the evening. 
.friday...south winds 5 to 10 knots becoming southwest. showers
likely with a chance of thunderstorms. 
.saturday...southwest winds 5 to 10 knots. mainly clear, then
becoming partly cloudy. 
.sunday...southwest winds 5 to 10 knots. a chance of showers. 

winds and waves higher in and near thunderstorms.

$$