568
FZUS61 KBUF 051502
GLFLO

Open Lake Forecast for Lake Ontario
National Weather Service Buffalo NY
1002 AM EST Wed Nov 5 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...Low pressure over the Upper Great Lakes will deepen from
29.6 inches to 29.4 inches as it passes along or just north of the
north shore of the lake this afternoon into this evening, before
making its way across New England tonight while further
strengthening to 29.2 inches. In its wake, a 30.2 inch high will
build from the Ohio Valley to the Mid-Atlantic states Thursday, then
will slide out to sea through Friday while allowing a 29.4 inch low
to track from the Upper Great Lakes to Quebec and push its trailing
cold front across the lake Friday night. Another 29.5 inch surface
low will then track from the Ohio Valley to New England Sunday and
Monday.

LOZ062-052200-
Lake Ontario open waters from the Niagara River to Hamlin Beach-
1002 AM EST Wed Nov 5 2025

...GALE WARNING IN EFFECT THROUGH LATE TONIGHT...

.REST OF TODAY...Southwest winds 15 to 25 knots becoming west and
increasing to 35 knot gales this afternoon. Showers. Waves 3 to
5 feet building to 9 to 12 feet. Waves occasionally around
15 feet.
.TONIGHT...Northwest gales to 35 knots diminishing to 30 knots.
Showers through the early overnight, then a chance of showers
late. Waves 10 to 14 feet subsiding to 7 to 11 feet. Waves
occasionally around 18 feet.
.THURSDAY...Northwest winds 15 to 25 knots becoming west. Waves
5 to 8 feet subsiding to 2 to 4 feet. Waves occasionally around
10 feet.
.THURSDAY NIGHT...West winds 10 to 15 knots becoming south. Waves
1 to 3 feet.
.FRIDAY...South winds 15 to 25 knots becoming west. Showers.
Waves 3 to 6 feet.
.SATURDAY...Northwest winds 15 to 20 knots becoming northeast
10 to 15 knots. A chance of showers during the day, then showers
likely Saturday night. Waves 3 to 5 feet subsiding to 1 to
3 feet.
.SUNDAY...Northeast winds 15 to 20 knots becoming northwest. Rain
showers likely during the day, then rain showers likely with a
chance of snow showers Sunday night. Waves 3 to 5 feet.

$$

LOZ063>065-052200-
Lake Ontario open waters from Hamlin Beach to the Saint Lawrence
River-
1002 AM EST Wed Nov 5 2025

...GALE WARNING IN EFFECT THROUGH LATE TONIGHT...

.REST OF TODAY...South winds 15 to 20 knots becoming southwest
and increasing to 35 knot gales this afternoon. A chance of
showers late this morning, then showers this afternoon. Waves
2 to 4 feet building to 9 to 12 feet. Waves occasionally around
15 feet.
.TONIGHT...West gales to 40 knots becoming northwest and
diminishing to 30 knots after midnight. Rain showers through the
early overnight, then a chance of rain showers late. Waves 12 to
17 feet subsiding to 9 to 12 feet. Waves occasionally around
22 feet.
.THURSDAY...Northwest winds 15 to 25 knots becoming west. Waves
7 to 10 feet subsiding to 3 to 6 feet. Waves occasionally around
13 feet.
.THURSDAY NIGHT...West winds 15 to 20 knots becoming south. Waves
3 to 5 feet subsiding to 1 to 3 feet.
.FRIDAY...South winds to 30 knots becoming west 15 to 25 knots.
Showers. Waves 5 to 8 feet subsiding to 3 to 6 feet. Waves
occasionally around 10 feet.
.SATURDAY...Northwest winds 15 to 20 knots becoming east 5 to
15 knots. Rain showers likely. Waves 3 to 6 feet subsiding to
1 to 3 feet.
.SUNDAY...East winds 15 to 20 knots becoming northwest. Rain
showers during the day, then rain showers with snow showers
likely Sunday night. Waves 2 to 4 feet building to 3 to 6 feet.

$$

LOZ061-052200-
MAFOR 0516/
ONTARIO WEST 1/2...GALE WARNING IN EFFECT...11546 11556 11656
11756 12740 11730 11720. Waves 3 to 5 feet building to 9 to 12
feet, and occasionally around 15 feet this afternoon. Waves 11 to
15 feet subsiding to 7 to 10 feet, and occasionally around 19
feet tonight. Waves 6 to 9 feet subsiding to 4 to 7 feet, and
occasionally around 11 feet Thursday morning.

ONTARIO EAST 1/2...GALE WARNING IN EFFECT...11430 11546 11656
11756 11750 12740 11730. Waves 2 to 4 feet building to 9 to 12
feet, and occasionally around 15 feet this afternoon. Waves 12 to
17 feet subsiding to 9 to 12 feet, and occasionally around 22
feet tonight. Waves 7 to 10 feet subsiding to 5 to 8 feet, and
occasionally around 13 feet Thursday morning.

$$