291
FZUS61 KBUF 312003
GLFLO

Open Lake Forecast for Lake Ontario
National Weather Service Buffalo NY
403 PM EDT Thu Jul 31 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 large 30.4 inch area of Canadian high pressure across
the upper Great Lakes will expand southeast across the lower Great
Lakes region through Friday, remaining anchored across the entire
Great Lakes region through this weekend and into the start of the
next week.

LOZ062-010300-
Lake Ontario open waters from the Niagara River to Hamlin Beach-
403 PM EDT Thu Jul 31 2025

.TONIGHT...East winds 10 to 15 knots becoming northeast 15 to
20 knots. Waves 2 to 4 feet.
.FRIDAY...Northeast winds 15 to 20 knots becoming east 5 to
15 knots. Waves 2 to 4 feet subsiding to 1 to 3 feet.
.FRIDAY NIGHT...Southwest winds 10 knots or less becoming north.
Waves 2 feet or less.
.SATURDAY...North winds 5 to 10 knots becoming southwest. Waves
1 foot or less.
.SATURDAY NIGHT...Southwest winds 5 to 10 knots becoming west.
Waves 1 foot or less.
.SUNDAY...West winds 5 to 10 knots. Waves 1 foot or less.
.MONDAY...West winds 10 knots or less becoming southeast. Waves
1 foot or less.
.TUESDAY...Southeast winds 5 to 10 knots. Waves 1 foot or less.

$$

LOZ063>065-010300-
Lake Ontario open waters from Hamlin Beach to the Saint Lawrence
River-
403 PM EDT Thu Jul 31 2025

.TONIGHT...Northeast winds 10 to 15 knots increasing to 15 to
20 knots. Waves 1 to 3 feet building to 3 to 5 feet.
.FRIDAY...Northeast winds 15 to 20 knots becoming north 10 to
15 knots. Waves 2 to 4 feet subsiding to 1 to 3 feet.
.FRIDAY NIGHT...North winds 10 knots or less becoming northeast.
Waves 2 feet or less.
.SATURDAY...North winds 10 knots or less becoming west. Waves
1 foot or less.
.SATURDAY NIGHT...Southwest winds 5 to 10 knots. Waves 2 feet or
less.
.SUNDAY...West winds 5 to 15 knots becoming southwest. Waves
2 feet or less.
.MONDAY...Southwest winds 10 knots or less becoming south. Waves
1 foot or less.
.TUESDAY...South winds 10 knots or less becoming southeast. Waves
1 foot or less.

$$

LOZ061-010300-
MAFOR 3121/
ONTARIO WEST 1/2 12210 13120 12110 11100. Waves 2 to 4 feet
building to 3 to 5 feet tonight. Waves 2 to 4 feet subsiding to 1
to 3 feet Friday.

ONTARIO EAST 1/2 12110 13120 12110 11810. Waves 2 to 4 feet
subsiding to 1 to 3 feet, then building to 3 to 5 feet tonight.
Waves 2 to 4 feet subsiding to 1 to 3 feet Friday.

$$