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open lake forecast for lake ontario
national weather service buffalo ny
1002 am est sun dec 28 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 ridge of high pressure averaging 30.1 inches will 
weaken over eastern quebec through this evening. low pressure 
averaging 29.1 inches will then cross the lower great lakes tonight, 
before moving to northern new england and southern quebec monday, 
then to the canadian maritimes by tuesday while deepening to 28.8 
inches. a trough averaging 29.6 inches, will drop southward across 
the lake thursday.


loz065-282200-
lake ontario open waters from mexico bay to the saint lawrence
river-
1002 am est sun dec 28 2025

...storm warning in effect from monday afternoon through monday
evening...

.this afternoon...southeast winds 10 to 15 knots. a chance of rain
late. waves 2 feet or less. 
.tonight...southeast winds 10 to 15 knots increasing to 15 to
25 knots. rain. waves 2 feet or less building to 3 to 5 feet. 
.monday...south winds to 30 knots becoming southwest and
increasing to 45 knot gales in the afternoon. rain and snow
showers in the morning, then snow and rain showers in the
afternoon. waves 3 to 6 feet building to 15 to 19 feet. waves
occasionally around 24 feet. 
.monday night...southwest storm force winds to 50 knots becoming
west and diminishing to 45 knot gales overnight. lake effect snow
showers. waves 15 to 20 feet building to 16 to 21 feet, then
subsiding to 15 to 19 feet. waves occasionally around 27 feet. 
.tuesday...west gales to 40 knots diminishing to 30 knots. lake
effect snow showers. waves 12 to 17 feet subsiding to 8 to
11 feet. waves occasionally around 22 feet. 
.wednesday...west winds to 30 knots becoming northwest 15 to
25 knots. lake effect snow showers. waves 7 to 10 feet building
to 9 to 12 feet, then subsiding to 5 to 8 feet. waves
occasionally around 15 feet. 
.thursday...northwest winds 15 to 20 knots becoming west. lake
effect snow showers likely. waves 3 to 5 feet building to 3 to
6 feet. 

$$

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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
1002 am est sun dec 28 2025


slz022-282200-
saint lawrence river from cape vincent to ogdensburg-
1002 am est sun dec 28 2025

.rest of today...light and variable winds. a chance of freezing
rain late. 
.tonight...northeast winds 10 knots or less becoming east 10 to
15 knots. freezing rain in the evening, then freezing rain and
rain after midnight. 
.monday...southeast winds 15 to 25 knots becoming southwest to
30 knots. rain showers, snow showers and freezing rain in the
morning, then snow and rain showers in the afternoon. 
.monday night...southwest winds to 30 knots becoming west 15 to
25 knots. lake effect snow showers. 
.tuesday...west winds 15 to 25 knots diminishing to 5 to
10 knots. snow showers during the day, then a chance of snow
showers tuesday night. 
.wednesday...southwest winds 5 to 10 knots becoming west. lake
effect snow showers. 
.thursday...west winds 10 knots or less becoming southwest. a
chance of snow showers. 

$$

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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
1002 am est sun dec 28 2025


slz024-282200-
saint lawrence river from ogdensburg to saint regis-
1002 am est sun dec 28 2025

.rest of today...light and variable winds. partly sunny late this
morning, then becoming mostly cloudy. 
.tonight...northeast winds 5 to 15 knots. a chance of freezing
rain early, then freezing rain from late evening on. 
.monday...east winds 15 to 20 knots becoming southwest and
increasing to 30 knots. rain showers and freezing rain in the
morning, then rain showers with snow showers and freezing rain
likely in the afternoon. 
.monday night...southwest winds to 30 knots becoming west. lake
effect snow showers with freezing lake effect rain likely in the
evening, then lake effect snow showers overnight. 
.tuesday...west winds to 30 knots diminishing to 10 to 15 knots.
snow showers during the day, then a chance of snow showers
tuesday night. 
.wednesday...southwest winds 5 to 10 knots becoming west. lake
effect snow showers likely. 
.thursday...southwest winds 5 to 10 knots. a chance of snow
showers. 

$$