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open lake forecast for lake ontario
national weather service buffalo ny
402 pm est wed dec 17 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 29.1 inch low near lake superior thursday will deepen 
to 28.9 inches while moving to central quebec by friday, with its 
trailing strong cold front crossing the lake early friday morning. 
in its wake, a 30.1 inch high will slowly build across the lake 
friday night and early saturday, then will drift off the atlantic 
coastline later saturday and saturday night, with a 29.5 inch low 
moving across ontario and quebec and pushing its attendant cold 
front across the lake sunday. a large 30.6 inch high will then build 
east across the lake monday.


loz062-180400-
lake ontario open waters from the niagara river to hamlin beach-
402 pm est wed dec 17 2025

...gale watch in effect from thursday evening through late friday
night...

.tonight...west winds 15 to 20 knots becoming south 10 to
15 knots. waves 4 to 7 feet subsiding to 1 to 3 feet. waves
occasionally around 9 feet. 
.thursday...south winds 10 to 15 knots increasing to 15 to
25 knots. waves 1 to 3 feet building to 3 to 5 feet. 
.thursday night...south winds to 30 knots becoming southwest.
showers. waves 3 to 6 feet building to 6 to 9 feet. waves
occasionally around 11 feet. 
.friday...southwest winds to 30 knots becoming west and
increasing to 40 knot gales in the afternoon. snow likely with
rain showers in the morning, then snow likely in the afternoon.
waves 8 to 11 feet building to 12 to 16 feet. waves occasionally
around 20 feet. 
.friday night...west gales to 35 knots diminishing to 15 to
20 knots. a chance of snow showers in the evening. waves 12 to
16 feet subsiding to 4 to 7 feet. waves occasionally around
20 feet. 
.saturday...southwest winds 15 to 25 knots becoming west to
30 knots. a chance of rain and snow showers. waves 3 to 5 feet
building to 7 to 10 feet. waves occasionally around 13 feet. 
.sunday...west gales to 35 knots becoming northwest and
diminishing to 15 to 20 knots. a chance of snow showers during
the day. waves 9 to 12 feet subsiding to 4 to 7 feet. waves
occasionally around 15 feet. 
.monday...northwest winds 10 to 15 knots becoming south. a chance
of rain and snow monday night. waves 2 to 4 feet subsiding to
1 to 2 feet. 

$$

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open lake forecast for lake ontario
national weather service buffalo ny
402 pm est wed dec 17 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 29.1 inch low near lake superior thursday will deepen 
to 28.9 inches while moving to central quebec by friday, with its 
trailing strong cold front crossing the lake early friday morning. 
in its wake, a 30.1 inch high will slowly build across the lake 
friday night and early saturday, then will drift off the atlantic 
coastline later saturday and saturday night, with a 29.5 inch low 
moving across ontario and quebec and pushing its attendant cold 
front across the lake sunday. a large 30.6 inch high will then build 
east across the lake monday.


loz063-180400-
lake ontario open waters from hamlin beach to sodus bay-
402 pm est wed dec 17 2025

...gale watch in effect from thursday evening through late friday
night...

.tonight...west winds 15 to 25 knots becoming south 15 to
20 knots. waves 8 to 11 feet subsiding to 2 to 4 feet. waves
occasionally around 14 feet. 
.thursday...south winds 15 to 25 knots increasing to 30 knots.
waves 3 to 6 feet building to 5 to 8 feet. waves occasionally
around 10 feet. 
.thursday night...south winds to 30 knots. showers. waves 5 to
9 feet. waves occasionally around 11 feet. 
.friday...southwest winds to 30 knots becoming west and
increasing to 40 knot gales. rain showers with snow likely in the
morning, then snow likely in the afternoon. waves 7 to 10 feet
building to 15 to 19 feet. waves occasionally around 24 feet. 
.friday night...west gales to 40 knots diminishing to 15 to
20 knots. a chance of snow showers. waves 14 to 19 feet subsiding
to 7 to 10 feet. waves occasionally around 24 feet. 
.saturday...southwest winds 10 to 15 knots becoming west and
increasing to 30 knots. a chance of rain and snow showers. waves
4 to 7 feet building to 8 to 11 feet. waves occasionally around
14 feet. 
.sunday...west gales to 40 knots becoming northwest and
diminishing to 20 to 25 knots. a chance of snow showers. waves
11 to 16 feet subsiding to 7 to 10 feet. waves occasionally
around 20 feet. 
.monday...northwest winds 15 to 20 knots becoming south. a chance
of rain and snow monday night. waves 3 to 6 feet subsiding to
1 to 3 feet. 

$$

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open lake forecast for lake ontario
national weather service buffalo ny
402 pm est wed dec 17 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 29.1 inch low near lake superior thursday will deepen 
to 28.9 inches while moving to central quebec by friday, with its 
trailing strong cold front crossing the lake early friday morning. 
in its wake, a 30.1 inch high will slowly build across the lake 
friday night and early saturday, then will drift off the atlantic 
coastline later saturday and saturday night, with a 29.5 inch low 
moving across ontario and quebec and pushing its attendant cold 
front across the lake sunday. a large 30.6 inch high will then build 
east across the lake monday.


loz064-065-180400-
lake ontario open waters from sodus bay to the saint lawrence
river-
402 pm est wed dec 17 2025

...gale watch in effect from thursday evening through late friday
night...

.tonight...west winds 15 to 25 knots becoming south 15 to
20 knots. waves 9 to 12 feet subsiding to 2 to 4 feet. waves
occasionally around 15 feet. 
.thursday...south winds to 30 knots. waves 3 to 5 feet building
to 6 to 9 feet. waves occasionally around 11 feet. 
.thursday night...south gales to 35 knots. showers. waves 7 to
10 feet. waves occasionally around 13 feet. 
.friday...southwest winds to 30 knots becoming west and
increasing to 45 knot gales in the afternoon. rain and snow in
the morning, then snow in the afternoon. waves 7 to 10 feet
building to 15 to 20 feet. waves occasionally around 26 feet. 
.friday night...west gales to 45 knots becoming northwest and
diminishing to 15 to 25 knots overnight. snow in the evening,
then snow showers likely overnight. waves 16 to 21 feet subsiding
to 8 to 11 feet. waves occasionally around 27 feet. 
.saturday...west winds 10 to 15 knots becoming southwest and
increasing to 30 knots. a chance of snow showers during the day,
then rain and snow showers likely saturday night. waves 4 to
7 feet building to 8 to 11 feet. waves occasionally around
14 feet. 
.sunday...west gales to 40 knots becoming northwest and
diminishing to 15 to 25 knots. snow and rain showers likely
during the day, then a chance of snow showers sunday night. waves
11 to 16 feet subsiding to 7 to 10 feet. waves occasionally
around 20 feet. 
.monday...northwest winds 15 to 20 knots becoming south. a chance
of snow monday night. waves 3 to 6 feet subsiding to 2 to 4 feet.

$$

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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
402 pm est wed dec 17 2025


slz022-180400-
saint lawrence river from cape vincent to ogdensburg-
402 pm est wed dec 17 2025

.tonight...west winds 5 to 15 knots becoming south 10 knots or
less. partly cloudy. 
.thursday...south winds 5 to 15 knots increasing to 15 to
20 knots. partly to mostly sunny. 
.thursday night...south winds 15 to 25 knots. showers.
.friday...southwest winds 15 to 25 knots. rain and snow. 
.friday night...west winds 15 to 25 knots diminishing to 5 to
10 knots overnight. snow likely in the evening, then a chance of
snow showers overnight. 
.saturday...southwest winds 5 to 15 knots increasing to 15 to
20 knots. a chance of snow showers during the day, then snow and
rain showers likely saturday night. 
.sunday...west winds 5 to 15 knots becoming northwest. snow
showers likely during the day, then a chance of snow showers
sunday night. 
.monday...northwest winds 10 knots or less becoming south. a
chance of snow monday night. 

$$

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open lake forecast for lake erie
national weather service cleveland oh
338 pm est wed dec 17 2025

for waters beyond five nautical miles of shore on lake erie

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...
ridge of high pressure averaging 30.10 inches will quickly build 
in and allow winds to subside tonight. a surface low 28.50 inches
will track east thursday night. this low track will drag a strong
cold front eastward across lake erie thursday night. a trough 
averaging 30.00 inches should linger over lake erie on friday as 
a ridge attempts to build from the upper midwest. this ridge, 
averaging 30.20 inches, should abate winds across lake erie 
friday night and early saturday. during saturday night, a cold 
front should sweep eastward across lake erie. behind the front, a 
ridge averaging 30.30 inches should build from the upper midwest 
through sunday.


lez061-168-169-180345-
ripley to buffalo ny extending from 5nm off shoreline to us-
canadian border-geneva-on-the-
lake to conneaut oh beyond 5 nm off shoreline to us-
canadian border-
conneaut oh to ripley ny beyond 5 nm off shoreline to us-
canadian border-
338 pm est wed dec 17 2025

...gale watch in effect from thursday evening through friday
evening...

.tonight...southwest winds 10 to 15 knots becoming south. waves
3 to 5 feet subsiding to 1 to 3 feet. 
.thursday...south winds 15 to 25 knots increasing to 30 knots. a
slight chance of rain early in the afternoon. a chance of rain
late. waves 2 to 4 feet building to 5 to 8 feet. waves
occasionally around 10 feet. 
.thursday night...south gales to 35 knots becoming southwest. 
rain in the evening, then rain and snow overnight. waves 6 to 9 
feet building to 10 to 13 feet. waves occasionally around 16 feet.
.friday...southwest gales to 35 knots becoming west. snow and
rain in the morning, then a chance of snow in the afternoon.
waves 10 to 15 feet building to 12 to 16 feet. waves occasionally
around 20 feet. 
.friday night...west gales to 35 knots becoming southwest and
diminishing to 15 to 25 knots overnight. waves 10 to 14 feet
subsiding to 5 to 8 feet. waves occasionally around 18 feet. 
.saturday...south winds 15 to 25 knots becoming west to 30 knots.
a chance of rain saturday night. waves 3 to 5 feet building to
6 to 10 feet. waves occasionally around 13 feet. 
.sunday...west winds to 30 knots becoming northwest 15 to
25 knots. waves 6 to 10 feet subsiding to 3 to 5 feet. waves
occasionally around 13 feet. 
.monday...west winds 10 to 15 knots becoming south 15 to
20 knots. waves 1 to 3 feet. 

$$