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open lake forecast for lake ontario
national weather service buffalo ny
1024 pm edt tue apr 1 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 30.5 inch surface high will build southeast across 
the lower great lakes tonight and tuesday before moving across 
northern new england on wednesday. meanwhile a 29.0 inch low will 
track from iowa on wednesday and then across the upper great lakes
and into southwestern quebec province by thursday. a 30.2 inch 
high will build into the great lakes region through friday. a
frontal boundary will develop south of the lake with a series of
weak lows tracking along this boundary during the weekend.


loz063>065-020915-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1024 pm edt tue apr 1 2025

.overnight...northeast winds 10 to 15 knots increasing to
15 to 20 knots. waves 2 feet or less building to 2 to 4 feet. 
.wednesday...east winds 15 to 25 knots increasing to 30 knots. a
chance of rain and snow showers early in the afternoon. rain and
snow showers late. waves 2 to 4 feet building to 4 to 7 feet.
waves occasionally around 9 feet. 
.wednesday night...east winds to 30 knots becoming south 15 to
25 knots. rain showers. waves 5 to 8 feet. waves occasionally
around 10 feet. 
.thursday...south winds to 30 knots becoming southwest 15 to
25 knots. showers in the morning, then a chance of showers in the
afternoon. waves 4 to 7 feet subsiding to 3 to 6 feet. waves
occasionally around 9 feet. 
.thursday night...west winds 15 to 20 knots diminishing to 10 to
15 knots. waves 3 to 6 feet subsiding to 1 to 3 feet. 
.friday...west winds 5 to 15 knots becoming east. a chance of
rain showers friday night. waves 1 to 3 feet. 
.saturday...east winds 15 to 20 knots becoming west. rain
showers. waves 2 to 4 feet. 
.sunday...west winds 10 to 15 knots becoming northwest 15 to
20 knots. rain showers likely during the day, then a chance of
rain showers sunday night. waves 2 to 4 feet building to 3 to
5 feet. 

$$

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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
1022 pm edt tue apr 1 2025


slz022-024-020915-
saint lawrence river from cape vincent to saint regis
1022 pm edt tue apr 1 2025

.rest of tonight...north winds 5 to 15 knots becoming northeast.
mainly clear late this evening, then becoming partly cloudy. 
.wednesday...northeast winds 10 to 15 knots becoming east. rain
showers likely with a chance of snow showers late. 
.wednesday night...east winds 5 to 15 knots becoming southeast.
snow and rain showers in the evening, then rain and snow showers
overnight. 
.thursday...south winds 15 to 20 knots becoming southwest. rain
showers in the morning, then a chance of rain showers in the
afternoon. 
.thursday night...southwest winds 5 to 15 knots becoming west.
partly to mostly cloudy. 
.friday...west winds 10 knots or less becoming northeast. partly
to mostly cloudy. 
.saturday...east winds 5 to 10 knots becoming southwest. rain
showers likely. 
.sunday...west winds 5 to 10 knots. rain showers likely during
the day, then a chance of rain and snow showers sunday night. 

$$