Great Lakes Forecast
Issued by NWS

Home |  Current Version |  Previous Version |  Text Only |  Print | Product List |  Glossary On
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29
203
FZUS61 KBUF 101402
GLFLO

Open Lake Forecast for Lake Ontario
National Weather Service Buffalo NY
1002 AM EDT Fri Oct 10 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 30.4 inch high will drift off the New England coast
today. A weak 30.0 inch low will then move southeast across the
Great Lakes tonight through Saturday before weakening to a remnant
trough Saturday night across Western NY. Another 30.4 inch high will
then build from Quebec Saturday night to the Canadian Maritimes
Sunday, where it will remain in place through Tuesday. Meanwhile, a
29.5 inch low will drift from just offshore of the Carolinas Sunday
to off the Jersey shore by Monday night.

LOZ062-102100-
Lake Ontario open waters from the Niagara River to Hamlin Beach-
1002 AM EDT Fri Oct 10 2025

.THIS AFTERNOON...South winds 5 to 15 knots. Waves 2 feet or less.
.TONIGHT...South winds 10 to 15 knots. A chance of showers after
midnight. Showers likely late. Waves 1 to 3 feet.
.SATURDAY...South winds 10 to 15 knots becoming east. Showers
likely. Waves 1 to 3 feet.
.SATURDAY NIGHT...East winds 15 to 20 knots. Showers likely.
Waves 2 to 4 feet.
.SUNDAY...East winds 15 to 20 knots. Showers likely during the
day, then a chance of showers Sunday night. Waves 3 to 6 feet.
.MONDAY...East winds 15 to 20 knots becoming northeast 5 to
15 knots. A chance of showers during the day. Waves 3 to 6 feet
subsiding to 1 to 3 feet.
.TUESDAY...North winds 10 knots or less becoming northwest 10 to
15 knots. A chance of showers Tuesday night. Waves 2 feet or
less.

$$

LOZ063>065-102100-
Lake Ontario open waters from Hamlin Beach to the Saint Lawrence
River-
1002 AM EDT Fri Oct 10 2025

.THIS AFTERNOON...South winds 10 to 15 knots. Waves 1 to 3 feet.
.TONIGHT...South winds 15 to 20 knots. Waves 1 to 3 feet building
to 3 to 5 feet.
.SATURDAY...South winds 15 to 20 knots becoming southeast 10 to
15 knots. A chance of showers. Waves 2 to 4 feet subsiding to
1 to 3 feet.
.SATURDAY NIGHT...East winds 15 to 20 knots. A chance of showers.
Waves 1 to 3 feet building to 2 to 4 feet.
.SUNDAY...East winds 15 to 20 knots. A chance of showers. Waves
3 to 6 feet.
.MONDAY...Northeast winds 15 to 20 knots diminishing to 10 to
15 knots. A chance of showers. Waves 3 to 6 feet subsiding to
1 to 3 feet.
.TUESDAY...North winds 5 to 15 knots. A chance of showers. Waves
1 to 3 feet.

$$

LOZ061-102100-
MAFOR 1015/
ONTARIO WEST 1/2 14410 11420 12410 11416. Waves 2 feet or less
this afternoon. Waves 1 to 3 feet tonight and Saturday morning.

ONTARIO EAST 1/2 12410 15420. A chance of showers Saturday
morning. Waves 1 to 3 feet this afternoon. Waves 1 to 3 feet
building to 3 to 5 feet tonight. Waves 2 to 4 feet Saturday
morning.

$$