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open lake forecast for lake ontario
national weather service buffalo ny
1002 am est wed nov 19 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 30.3 inch high centered over the central great lakes 
will build over the lower great lakes wednesday, then into new 
england thursday. a 29.5 inch surface low along the southern 
shoreline of hudson bay will swing a cold front east across the 
lower great lakes friday, followed by a 30.1 inch high building over 
the ohio valley and lower great lakes saturday. a 29.5 inch low will 
then move across northern ontario into lower hudson bay on sunday, 
while sending an attendant warm front across the lake saturday night.


loz064-065-192200-
lake ontario open waters from sodus bay to the saint lawrence
river-
1002 am est wed nov 19 2025

.this afternoon...north winds less than 10 knots becoming
northwest. waves 1 foot or less. 
.tonight...light and variable winds. waves 1 foot or less. 
.thursday...south winds 10 knots or less becoming southeast.
waves 1 foot or less. 
.thursday night...southeast winds 5 to 15 knots becoming south
15 to 20 knots. a chance of rain showers overnight. waves 1 to
3 feet. 
.friday...southwest winds 15 to 20 knots becoming northwest 10 to
15 knots. rain showers likely during the day, then a chance of
rain showers friday night. waves 3 to 5 feet subsiding to 1 to
3 feet. 
.saturday...north winds 5 to 10 knots becoming south. waves
2 feet or less. 
.sunday...south winds 5 to 15 knots becoming west. a chance of
rain showers sunday night. waves 1 to 3 feet. 

$$

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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
1002 am est wed nov 19 2025


slz022-192200-
saint lawrence river from cape vincent to ogdensburg-
1002 am est wed nov 19 2025

.this afternoon...light and variable winds. mostly sunny. 
.tonight...light and variable winds. partly to mostly cloudy. 
.thursday...light and variable winds. partly to mostly sunny. 
.thursday night...light and variable winds becoming south 5 to
10 knots. a chance of rain and snow showers overnight. 
.friday...southwest winds 10 knots or less becoming northwest.
rain showers during the day. 
.saturday...north winds less than 10 knots becoming south. partly
to mostly cloudy. 
.sunday...south winds 10 knots or less becoming southwest. a
chance of rain showers. 

$$