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open lake forecast for lake ontario
national weather service buffalo ny
402 pm est fri dec 26 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 compact 29.7 inch low will then move across ohio and 
pennsylvania tonight before moving off the mid atlantic coast by 
saturday. a ridge of high pressure averaging 30.2 inches will then 
build into quebec and new england saturday through saturday night. 
complex low pressure averaging 29.1 inches will then cross the lower 
great lakes sunday night, before moving to northern new england and 
southern quebec monday, then to the canadian maritimes by tuesday 
while deepening to 28.9 inches. northwest flow will average 29.5 
inches across the lake wednesday.


loz064-065-270400-
lake ontario open waters from sodus bay to the saint lawrence
river-
402 pm est fri dec 26 2025

.tonight...east winds 15 to 25 knots. snow this evening, then a
chance of snow showers after midnight. waves 3 to 5 feet
subsiding to 2 to 4 feet. 
.saturday...northeast winds 5 to 15 knots. waves 1 to 3 feet. 
.saturday night...northeast winds 5 to 10 knots becoming
southeast. waves 1 foot or less. 
.sunday...southeast winds 10 to 15 knots. a chance of rain and
freezing rain in the afternoon. waves 1 to 3 feet. 
.sunday night...southeast winds 10 to 15 knots increasing to
15 to 20 knots. rain. waves 1 to 3 feet building to 2 to 4 feet. 
.monday...south winds to 30 knots becoming west and increasing to
45 knot gales. rain and snow showers during the day, then snow
showers monday night. waves 5 to 8 feet building to 18 to
23 feet. waves occasionally around 29 feet. 
.tuesday...west gales to 40 knots diminishing to 30 knots. lake
effect snow showers. waves 16 to 21 feet subsiding to 10 to
13 feet. waves occasionally around 27 feet. 
.wednesday...west gales to 35 knots diminishing to 30 knots. lake
effect snow showers likely. waves 10 to 14 feet. waves
occasionally around 18 feet. 

$$

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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
402 pm est fri dec 26 2025


slz022-270400-
saint lawrence river from cape vincent to ogdensburg-
402 pm est fri dec 26 2025

.tonight...northeast winds 5 to 15 knots. snow this evening, then
a chance of snow showers after midnight. 
.saturday...northeast winds 5 to 10 knots. mostly cloudy in the
morning, then clearing. 
.saturday night...northeast winds less than 10 knots. partly
cloudy in the evening, then becoming mostly cloudy. 
.sunday...light and variable winds. a chance of freezing rain in
the afternoon. 
.sunday night...northeast winds 10 knots or less becoming east.
freezing rain. 
.monday...southeast winds 10 to 15 knots becoming west 15 to
20 knots. rain, snow showers and freezing rain during the day,
then snow showers monday night. 
.tuesday...west winds 15 to 20 knots diminishing to 5 to
15 knots. snow showers likely during the day, then a chance of
snow showers tuesday night. 
.wednesday...west winds 5 to 10 knots. snow showers likely during
the day, then a chance of snow showers wednesday night. 

$$

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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
402 pm est fri dec 26 2025


slz024-270400-
saint lawrence river from ogdensburg to saint regis-
402 pm est fri dec 26 2025

.tonight...northeast winds 5 to 10 knots. snow this evening, then
a chance of snow showers after midnight. 
.saturday...northeast winds 10 knots or less. mostly cloudy
early, then becoming mostly sunny. 
.saturday night...light and variable winds. mainly clear in the
evening, then becoming partly cloudy. 
.sunday...light and variable winds. partly sunny in the morning,
then becoming mostly cloudy. 
.sunday night...northeast winds 10 knots or less. a chance of
freezing rain in the evening, then freezing rain overnight. 
.monday...east winds 10 to 15 knots becoming west 15 to 20 knots.
freezing rain, rain and snow showers during the day, then snow
showers monday night. 
.tuesday...west winds 15 to 20 knots diminishing to 10 to
15 knots. snow showers likely during the day, then a chance of
snow showers tuesday night. 
.wednesday...west winds 5 to 10 knots. a chance of snow showers. 

$$