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open lake forecast for lake ontario
national weather service buffalo ny
402 am edt wed jul 9 2025

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 build across the lower great lakes 
today. a broad 29.9 inch surface low will then track across the mid-
atlantic states thursday and friday. a 29.7 inch low will lift north 
of the central great lake saturday, bringing a cold front to the 
western waters of the lake by saturday evening.


loz063>065-091500-
lake ontario open waters from hamlin beach to the saint lawrence
river-
402 am edt wed jul 9 2025

.today...southwest winds less than 10 knots becoming north. waves
1 foot or less. 
.tonight...east winds less than 10 knots becoming south. a chance
of showers late in the evening. a chance of showers and
thunderstorms after midnight. waves 1 foot or less. 
.thursday...south winds 10 knots or less becoming west. a chance
of showers and thunderstorms. waves 1 foot or less. 
.thursday night...southwest winds less than 10 knots. waves
1 foot or less. 
.friday...west winds 10 knots or less becoming south. waves
1 foot or less. 
.saturday...southeast winds 10 knots or less becoming south 10 to
15 knots. a chance of showers saturday night. waves 2 feet or
less. 
.sunday...southwest winds 5 to 15 knots becoming west. showers
likely with a chance of thunderstorms. waves 1 to 2 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 jul 9 2025


slz022-024-091500-
saint lawrence river from cape vincent to saint regis
402 am edt wed jul 9 2025

.today...light and variable winds. patchy fog early. a chance of
showers late. 
.tonight...light and variable winds. a chance of showers and
thunderstorms. 
.thursday...light and variable winds. a chance of showers in the
morning, then showers likely with a chance of thunderstorms in
the afternoon. 
.thursday night...southwest winds less than 10 knots. showers
likely with a chance of thunderstorms in the evening. 
.friday...southwest winds less than 10 knots. becoming mainly
clear. 
.saturday...south winds less than 10 knots. mainly clear, then
becoming partly cloudy. 
.sunday...southwest winds 10 knots or less. showers likely with a
chance of thunderstorms. 

winds and waves higher in and near thunderstorms.

$$