610
FZUS61 KBUF 182102
GLFLO

Open Lake Forecast for Lake Ontario
National Weather Service Buffalo NY
402 PM EST Tue Nov 18 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 28.8 inch low near the northern Labrador/Quebec border
will move northeast towards the North Atlantic tonight through
Wednesday. A 30.2 inch high centered over the upper Great Lakes
today will build to the lower Great Lakes Wednesday and to New
England Thursday. A 29.5 inch surface low along the southern
shoreline of Hudson Bay will swing a cold front east across the
lower Great Lakes Friday, followed by a 30.0 inch high building over
the Ohio Valley and lower Great Lakes Saturday. A weak 29.7 inch
wave of low pressure will then move across Ontario Province and the
Lower Lakes on Sunday.

LOZ062-190400-
Lake Ontario open waters from the Niagara River to Hamlin Beach-
402 PM EST Tue Nov 18 2025

.TONIGHT...Northwest winds 10 knots or less becoming northeast.
Waves 2 feet or less.
.WEDNESDAY...North winds 10 knots or less becoming northwest.
Waves 1 foot or less.
.WEDNESDAY NIGHT...North winds less than 10 knots becoming
southeast. Waves 1 foot or less.
.THURSDAY...Southeast winds less than 10 knots. Waves 1 foot or
less.
.THURSDAY NIGHT...South winds 10 knots or less becoming southwest
10 to 15 knots. A chance of showers in the evening, then showers
likely overnight. Waves 2 feet or less.
.FRIDAY...Southwest winds 15 to 20 knots becoming northwest 10 to
15 knots. Rain showers likely during the day. Waves 2 to 4 feet
subsiding to 1 to 3 feet.
.SATURDAY...Northwest winds 5 to 10 knots becoming southwest.
Waves 1 to 2 feet.
.SUNDAY...Southwest winds 10 to 15 knots becoming west. Waves
1 to 3 feet.

$$

LOZ063-190400-
Lake Ontario open waters from Hamlin Beach to Sodus Bay-
402 PM EST Tue Nov 18 2025

.TONIGHT...Northwest winds 5 to 10 knots becoming north. Waves
1 to 2 feet.
.WEDNESDAY...North winds 10 knots or less becoming northwest.
Waves 1 foot or less.
.WEDNESDAY NIGHT...Northwest winds less than 10 knots. Waves
1 foot or less.
.THURSDAY...Southeast winds 10 knots or less. Waves 1 foot or
less.
.THURSDAY NIGHT...South winds 5 to 15 knots becoming southwest. A
chance of showers overnight. Waves 2 feet or less.
.FRIDAY...Southwest winds 15 to 20 knots becoming northwest 10 to
15 knots. A chance of rain showers during the day. Waves 2 to
4 feet building to 3 to 5 feet, then subsiding to 2 to 4 feet.
.SATURDAY...Northwest winds 5 to 10 knots becoming southwest.
Waves 1 to 3 feet.
.SUNDAY...Southwest winds 10 to 15 knots becoming west. Waves
1 to 3 feet.

$$

LOZ064-065-190400-
Lake Ontario open waters from Sodus Bay to the Saint Lawrence
River-
402 PM EST Tue Nov 18 2025

.TONIGHT...Northwest winds 5 to 10 knots becoming north. Waves
1 to 3 feet subsiding to 1 foot or less.
.WEDNESDAY...North winds 10 knots or less becoming northwest.
Waves 1 foot or less.
.WEDNESDAY NIGHT...Northwest winds less than 10 knots. Waves
1 foot or less.
.THURSDAY...Southeast winds 5 to 10 knots. Waves 1 foot or less.
.THURSDAY NIGHT...Southeast winds 5 to 15 knots becoming south
15 to 20 knots. Showers likely overnight. Waves 1 to 3 feet.
.FRIDAY...Southwest winds 15 to 20 knots becoming northwest 10 to
15 knots. Rain showers during the day. Waves 3 to 6 feet
subsiding to 2 to 4 feet.
.SATURDAY...Northwest winds 5 to 10 knots becoming southwest.
Waves 1 to 3 feet.
.SUNDAY...Southwest winds 10 to 15 knots becoming west. A chance
of rain showers Sunday night. Waves 1 to 3 feet.

$$

LOZ061-190400-
MAFOR 1822/
ONTARIO WEST 1/2 11700 11800 12100 13800 11700. Waves 2 feet or
less.

ONTARIO EAST 1/2 11600 12700 13800 12700. Waves 1 to 3 feet
subsiding to 1 foot or less tonight. Waves 1 foot or less
Wednesday.

$$