564
FZUS61 KBUF 070802
GLFLO

Open Lake Forecast for Lake Ontario
National Weather Service Buffalo NY
402 AM EDT Tue Oct 7 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 sharp cold front over southern Ontario and Quebec will
push southeast across the lake this afternoon and early this
evening. In its wake...a 30.4 inch high will build from the upper
Great Lakes Wednesday to New York State Thursday. The high will then
drift off the New England coastline Friday...where it will then
linger through Saturday.

LOZ062-071500-
Lake Ontario open waters from the Niagara River to Hamlin Beach-
402 AM EDT Tue Oct 7 2025

.TODAY...Southwest winds 15 to 20 knots becoming west. Showers
likely with a chance of thunderstorms early, then showers with a
chance of thunderstorms. Showers late. Waves 1 to 3 feet building
to 2 to 4 feet.
.TONIGHT...Northwest winds 15 to 20 knots becoming north. Showers
early, then showers likely late in the evening. A chance of
showers after midnight. Waves 2 to 4 feet.
.WEDNESDAY...North winds 15 to 20 knots becoming northwest. Waves
3 to 5 feet.
.WEDNESDAY NIGHT...North winds 15 to 20 knots becoming northeast.
Waves 3 to 5 feet.
.THURSDAY...Northeast winds 15 to 20 knots becoming southeast and
diminishing to 10 knots or less. Waves 2 to 4 feet subsiding to
2 feet or less.
.FRIDAY...South winds 10 knots or less becoming southwest. Waves
1 foot or less.
.SATURDAY...Southwest winds 10 knots or less becoming east. Waves
1 foot or less.

Winds and waves higher in and near thunderstorms.

$$

LOZ063>065-071500-
Lake Ontario open waters from Hamlin Beach to the Saint Lawrence
River-
402 AM EDT Tue Oct 7 2025

.TODAY...Southwest winds 10 to 15 knots increasing to 15 to
20 knots. A chance of showers and thunderstorms early, then
showers with a chance of thunderstorms from late morning on.
Waves 1 to 3 feet building to 3 to 5 feet.
.TONIGHT...West winds 15 to 20 knots becoming north. Showers
through the early overnight, then a chance of showers late. Waves
2 to 4 feet building to 3 to 5 feet.
.WEDNESDAY...North winds 15 to 20 knots becoming northwest. Waves
3 to 5 feet subsiding to 2 to 4 feet.
.WEDNESDAY NIGHT...North winds 15 to 20 knots. Waves 3 to 6 feet.
.THURSDAY...North winds 15 to 20 knots becoming south and
diminishing to 10 knots or less. Waves 3 to 5 feet subsiding to
1 foot or less.
.FRIDAY...South winds 5 to 10 knots becoming southwest. Waves
2 feet or less.
.SATURDAY...South winds 10 knots or less becoming east. Waves
1 foot or less.

Winds and waves higher in and near thunderstorms.

$$

LOZ061-071500-
MAFOR 0709/
ONTARIO WEST 1/2 11510 11516 11526 11626 12726 12720. A chance of
thunderstorms today. Waves 1 to 3 feet building to 2 to 4 feet
today. Waves 2 to 4 feet building to 3 to 5 feet tonight.

ONTARIO EAST 1/2 11410 11510 12526 11626 11726 11720 11820. A
chance of thunderstorms today. Waves 1 to 3 feet building to 3 to
5 feet today. Waves 2 to 4 feet building to 3 to 5 feet tonight.

$$