Great Lakes Forecast
Issued by NWS

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248
FZUS61 KBUF 130802
GLFLO

Open Lake Forecast for Lake Ontario
National Weather Service Buffalo NY
402 AM EDT Fri Jun 13 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 30.2 inch high will drift slowly east off the New
England coast through this afternoon. A frontal boundary will remain
stalled south of the lower Great Lakes today through Monday.
Meanwhile, a 30.3 inch high will build from northern Ontario
province today, to southern Quebec Saturday, then into the Canadian
Maritimes by late Sunday. A weak 29.9 inch low will move from the
Ohio Valley Sunday to the Mid Atlantic Monday, then another weak
29.8 inch low will slide east across the upper Great Lakes Tuesday.

LOZ062-131500-
Lake Ontario open waters from the Niagara River to Hamlin Beach-
402 AM EDT Fri Jun 13 2025

.TODAY...East winds 10 to 15 knots increasing to 15 to 20 knots.
Waves 2 to 4 feet.
.TONIGHT...East winds 10 to 15 knots. Waves 1 to 3 feet.
.SATURDAY...East winds 10 to 15 knots. Waves 1 to 3 feet.
.SATURDAY NIGHT...East winds 5 to 10 knots becoming northeast.
Waves 1 to 2 feet.
.SUNDAY...East winds 5 to 10 knots. Waves 1 to 3 feet.
.MONDAY...East winds 5 to 10 knots becoming southwest. Waves
around 1 foot.
.TUESDAY...South winds 5 to 10 knots. A chance of showers Tuesday
night. Waves 2 feet or less.

$$

LOZ063>065-131500-
Lake Ontario open waters from Hamlin Beach to the Saint Lawrence
River-
402 AM EDT Fri Jun 13 2025

.TODAY...Northeast winds 5 to 15 knots. Waves 1 to 3 feet.
.TONIGHT...Northeast winds 5 to 15 knots. A chance of showers
late. Waves 1 to 3 feet.
.SATURDAY...Northeast winds 5 to 15 knots. Waves 1 to 3 feet.
.SATURDAY NIGHT...Northeast winds 5 to 10 knots becoming east.
Waves 2 feet or less.
.SUNDAY...East winds 5 to 10 knots becoming southeast. Waves
2 feet or less.
.MONDAY...Southeast winds 5 to 10 knots becoming south. Waves
1 foot or less.
.TUESDAY...South winds 5 to 10 knots. A chance of showers Tuesday
night. Waves 2 feet or less.

$$

LOZ061-131500-
MAFOR 1309/
ONTARIO WEST 1/2 11110 15210 11110. Waves 2 to 4 feet today.
Waves 1 to 3 feet tonight.

ONTARIO EAST 1/2 12110 14100 12110. Waves 1 to 3 feet.

$$