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open lake forecast for lake ontario
national weather service buffalo ny
1002 am est tue dec 23 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 29.7 inch surface low near the ontario and quebec border this 
afternoon with a warm front draped over the lake, will slide off 
the southern new england coastline wednesday as a 29.6 inch surface 
low. following the passage of this system, a 30.3 inch high will 
then build across the lake wednesday, sliding off the atlantic 
coastline thursday. a weak 29.8 inch surface low will slide across 
southern quebec thursday with its associated cold front dropping 
southward across the lake. following this front, a strong 30.5 inch 
surface high over ontario thursday will slide over the lake thursday 
night and then linger just to the east of the lake friday. a compact 
29.6 inch surface low will slide well south of the lake across ohio 
and southern pennsylvania friday night into saturday.


loz064-065-232200-
lake ontario open waters from sodus bay to the saint lawrence
river-
1002 am est tue dec 23 2025

.rest of today...southeast winds 15 to 20 knots becoming
southwest. rain and snow late this morning, then rain and snow
showers early this afternoon. rain showers likely late. waves
1 to 3 feet building to 3 to 5 feet. 
.tonight...west winds to 30 knots becoming northwest. a chance of
rain showers. waves 5 to 8 feet building to 8 to 12 feet. waves
occasionally around 15 feet. 
.wednesday...northwest winds 15 to 25 knots diminishing to 5 to
15 knots. waves 8 to 11 feet subsiding to 1 to 3 feet. waves
occasionally around 14 feet. 
.wednesday night...west winds 5 to 15 knots becoming southwest.
waves 2 feet or less. 
.thursday...west winds 10 to 15 knots becoming northeast 15 to
20 knots. waves 1 to 2 feet building to 3 to 5 feet, then
subsiding to 2 to 4 feet. 
.friday...east winds 15 to 25 knots. snow likely. waves 2 to
4 feet building to 3 to 5 feet. 
.saturday...east winds 15 to 20 knots becoming southeast. a
chance of snow during the day, then rain likely saturday night.
waves 2 to 4 feet. 

$$

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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
1002 am est tue dec 23 2025


slz022-232200-
saint lawrence river from cape vincent to ogdensburg-
1002 am est tue dec 23 2025

.rest of today...southeast winds 5 to 10 knots becoming south.
snow late this morning, then snow showers early this afternoon.
snow showers with a chance of rain showers late. 
.tonight...southwest winds 5 to 15 knots becoming northwest. rain
and snow showers likely early, then a chance of snow showers from
late evening on. 
.wednesday...northwest winds 5 to 15 knots becoming west less
than 10 knots. partly to mostly sunny. 
.wednesday night...light and variable winds. a chance of snow
showers overnight. 
.thursday...west winds 5 to 10 knots becoming north. mostly
cloudy. 
.friday...northeast winds 5 to 10 knots. a chance of snow during
the day, then snow likely friday night. 
.saturday...northeast winds 10 knots or less becoming east. a
chance of snow. 

$$