Chart / Forecasts

Lake Ontario open waters from the Niagara River to Hamlin Beach

LOZ062 · Open Lake Forecast · National Weather Service Buffalo NY · Issued 402 PM EDT Sat Oct 3 2026
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Forecast
Tonight
East winds 10 to 15 knots becoming southeast 15 to 20 knots. Waves 1 to 3 feet.
Sunday
Southeast winds 5 to 10 knots becoming southwest. Waves 1 to 3 feet subsiding to 1 foot or less.
Sunday Night
Southwest winds 10 to 15 knots becoming northwest 15 to 20 knots. A chance of showers. Waves 1 to 3 feet building to 3 to 5 feet.
Monday
Northwest winds 15 to 25 knots. Waves 3 to 6 feet building to 4 to 7 feet, then subsiding to 3 to 6 feet. Waves occasionally around 9 feet.
Monday Night
Northwest winds 15 to 20 knots diminishing to 10 to 15 knots. Waves 3 to 6 feet subsiding to 1 to 3 feet.
Tuesday
Northwest winds 10 knots or less becoming southwest 10 to 15 knots. Waves 2 feet or less.
Wednesday
Southwest winds 15 to 20 knots becoming west 10 to 15 knots. Waves 2 to 4 feet.
Thursday
West winds 10 to 15 knots. Waves 1 to 3 feet.
Synopsis
A 30.3 inch high will slide northeast into northern New England tonight. A 29.7 inch low over northwest Ontario Sunday will deepen to 29.4 inches as it slides just south of James Bay into central Quebec Sunday night, while sending a pair of cold fronts across the Lake. A 30.2 inch high over the upper Midwest will then build across the Great Lakes Monday into Tuesday, before sliding into the Northeast Wednesday. A cold front will then pass across the lake Thursday.
Source: National Weather Service Open Lake Forecast (GLF), issued 402 PM EDT Sat Oct 3 2026, valid until Sun, 04 Oct 2026 03:00 UTC. Original text · All zones