063
FZUS61 KBUF 310203
GLFLO

Open Lake Forecast for Lake Ontario
National Weather Service Buffalo NY
1002 PM EDT Wed Jul 30 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 cold front will cross the lake tonight, with a large
30.4 inch area of high pressure over the southern Canadian prairies
building southeast across the entire Great Lakes region Thursday
into Friday, remaining anchored across the area through the weekend.

LOZ062-310900-
Lake Ontario open waters from the Niagara River to Hamlin Beach-
1002 PM EDT Wed Jul 30 2025

.OVERNIGHT...North winds 15 to 20 knots becoming northeast.
Waves 1 to 3 feet building to 3 to 5 feet.
.THURSDAY...Northeast winds 15 to 20 knots becoming east. A
chance of showers late in the morning. Waves 3 to 6 feet.
.THURSDAY NIGHT...East winds 15 to 20 knots becoming northeast.
Waves 3 to 6 feet.
.FRIDAY...Northeast winds 15 to 20 knots diminishing to 10 to
15 knots. Waves 3 to 6 feet subsiding to 1 to 3 feet.
.FRIDAY NIGHT...North winds 5 to 15 knots becoming northeast.
Waves 1 to 2 feet.
.SATURDAY...North winds 10 knots or less becoming west. Waves
2 feet or less.
.SUNDAY...West winds 5 to 10 knots. Waves 1 foot or less.
.MONDAY...Southwest winds 10 knots or less becoming southeast.
Waves 1 foot or less.

$$

LOZ063>065-310900-
Lake Ontario open waters from Hamlin Beach to the Saint Lawrence
River-
1002 PM EDT Wed Jul 30 2025

.OVERNIGHT...Northeast winds 10 to 15 knots increasing to
15 to 20 knots. Waves 2 feet or less building to 3 to 5 feet.
.THURSDAY...Northeast winds 15 to 20 knots. A chance of showers.
Waves 3 to 6 feet.
.THURSDAY NIGHT...East winds 15 to 20 knots becoming northeast.
Waves 2 to 4 feet building to 3 to 5 feet.
.FRIDAY...Northeast winds 15 to 20 knots diminishing to 10 to
15 knots. Waves 3 to 5 feet subsiding to 1 to 3 feet.
.FRIDAY NIGHT...North winds 5 to 15 knots becoming northeast.
Waves 1 to 3 feet.
.SATURDAY...North winds 5 to 10 knots becoming southwest. Waves
1 foot or less.
.SUNDAY...West winds 5 to 15 knots. Waves 2 feet or less.
.MONDAY...Southwest winds 10 knots or less becoming south. Waves
1 foot or less.

$$

LOZ061-310900-
MAFOR 3103/
ONTARIO WEST 1/2 14120 11120 13220. Waves 1 to 3 feet building to
3 to 5 feet overnight. Waves 3 to 6 feet Thursday and Thursday
evening.

ONTARIO EAST 1/2 16120. Waves 1 to 2 feet building to 3 to 5 feet
overnight. Waves 3 to 6 feet Thursday. Waves 2 to 4 feet Thursday
evening.

$$