265
FZUS61 KBUF 200202
GLFLO

Open Lake Forecast for Lake Ontario
National Weather Service Buffalo NY
1002 PM EDT Tue Aug 19 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 29.9 inch low will move into the lower Great Lakes
through tonight. A lingering surface trough will remain near the
lake Wednesday, while Hurricane Erin curves north/northeastward,
with center of the storm remaining well off the Carolina coastline.
A 30.1 inch high will then build across the Great Lakes region
Thursday through Friday night. A 29.4 inch low will move near James
Bay Saturday.

LOZ062-200900-
Lake Ontario open waters from the Niagara River to Hamlin Beach-
1002 PM EDT Tue Aug 19 2025

.REST OF TONIGHT...East winds 15 to 20 knots diminishing to 10 to
15 knots. Showers. Waves 2 to 4 feet.
.WEDNESDAY...East winds 10 to 15 knots becoming northeast 15 to
20 knots. A chance of showers early. Waves 2 to 4 feet.
.WEDNESDAY NIGHT...Northeast winds 15 to 25 knots becoming east.
Waves 3 to 6 feet building to 5 to 7 feet. Waves occasionally
around 9 feet.
.THURSDAY...East winds 15 to 20 knots. Waves 4 to 7 feet
subsiding to 3 to 6 feet. Waves occasionally around 9 feet.
.THURSDAY NIGHT...East winds 15 to 20 knots becoming northeast
and diminishing to 5 to 10 knots. Waves 3 to 5 feet subsiding to
1 to 3 feet.
.FRIDAY...Northeast winds 10 knots or less becoming south. Waves
1 foot or less.
.SATURDAY...Southwest winds 5 to 10 knots. A chance of showers
Saturday night. Waves 2 feet or less.
.SUNDAY...Southwest winds 10 to 15 knots becoming west. A chance
of showers. Waves 1 to 3 feet.

$$

LOZ063-200900-
Lake Ontario open waters from Hamlin Beach to Sodus Bay-
1002 PM EDT Tue Aug 19 2025

.REST OF TONIGHT...East winds 15 to 20 knots becoming southeast.
Showers late this evening, then showers with a chance of
thunderstorms after midnight. Waves 2 to 4 feet.
.WEDNESDAY...Southeast winds 15 to 20 knots becoming east 10 to
15 knots. Showers early, then a chance of showers from late
morning on. Waves 1 to 3 feet.
.WEDNESDAY NIGHT...East winds 10 to 15 knots increasing to 15 to
25 knots. A chance of showers in the evening. Waves 2 to 4 feet
building to 3 to 6 feet.
.THURSDAY...East winds 15 to 20 knots becoming northeast 10 to
15 knots. Waves 3 to 6 feet.
.THURSDAY NIGHT...Northeast winds 5 to 15 knots. Waves 1 to
3 feet.
.FRIDAY...Northeast winds 10 knots or less becoming south. Waves
1 foot or less.
.SATURDAY...South winds 5 to 15 knots becoming southwest. A
chance of showers Saturday night. Waves 2 feet or less.
.SUNDAY...Southwest winds 10 to 15 knots becoming west. A chance
of showers. Waves 1 to 3 feet.

Winds and waves higher in and near thunderstorms.

$$

LOZ064-065-200900-
Lake Ontario open waters from Sodus Bay to the Saint Lawrence
River-
1002 PM EDT Tue Aug 19 2025

.REST OF TONIGHT...East winds 15 to 20 knots becoming southeast.
Showers. Waves 1 to 3 feet.
.WEDNESDAY...Southeast winds 15 to 20 knots becoming east 10 to
15 knots. Showers early, then a chance of showers from late
morning on. Waves 2 to 4 feet subsiding to 1 to 3 feet.
.WEDNESDAY NIGHT...East winds 10 to 15 knots increasing to 15 to
20 knots. A chance of showers in the evening. Waves 1 to 2 feet
building to 2 to 4 feet.
.THURSDAY...East winds 15 to 20 knots becoming northeast 10 to
15 knots. Waves 2 to 4 feet subsiding to 1 to 3 feet.
.THURSDAY NIGHT...Northeast winds 5 to 15 knots becoming east.
Waves 1 to 3 feet subsiding to 1 foot or less.
.FRIDAY...Northeast winds 10 knots or less becoming south. Waves
1 foot or less.
.SATURDAY...South winds 5 to 15 knots. Showers likely Saturday
night. Waves 1 to 3 feet.
.SUNDAY...South winds 10 to 15 knots becoming southwest. Showers
likely during the day, then a chance of showers Sunday night.
Waves 1 to 3 feet.

Winds and waves higher in and near thunderstorms.

$$

LOZ061-200900-
MAFOR 2003/
ONTARIO WEST 1/2 11226 11216 14210 11220 11130. Waves 2 to 4 feet
overnight and Wednesday. Waves 3 to 5 feet Wednesday evening.

ONTARIO EAST 1/2 12316 11326 11320 11310 12210 11220. Waves 2 to
4 feet subsiding to 1 to 3 feet overnight and Wednesday. Waves 1
to 3 feet building to 2 to 4 feet Wednesday evening.

$$