National Weather Service Marine Forecast FZUS61 KBUF

FZUS61 KBUF 041503
GLFLO

Open Lake Forecast for Lake Ontario
National Weather Service Buffalo NY
1003 AM EST Wed Mar 4 2026

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 over Michigan will slide across New York State today, then off the mid-Atlantic coast tonight. A 30.0 inch low will then track from the mid Mississippi Valley tonight to near Lake Erie Thursday, across Pennsylvania Thursday night, then out to sea Friday. Another 29.6 inch low is then forecast to lift across the central Great Lakes Saturday, with its trailing cold front crossing the lake Saturday night, and a 29.9 inch high then sliding across the Lower Great Lakes Sunday.

LOZ062-063-042200
Lake Ontario open waters from the Niagara River to Sodus Bay
1003 AM EST Wed Mar 4 2026

THIS AFTERNOON
Southwest winds 10 knots or less becoming northeast. Waves 1 foot or less.

TONIGHT
East winds 10 knots or less increasing to 10 to 15 knots. Waves 2 feet or less.

THURSDAY
East winds 10 to 15 knots becoming northeast and increasing to 15 to 25 knots. A chance of rain in the afternoon. Waves 1 to 2 feet building to 4 to 7 feet. Waves occasionally around 9 feet.

THURSDAY NIGHT
Northeast winds 15 to 25 knots. Rain. Waves 5 to 8 feet subsiding to 3 to 6 feet. Waves occasionally around 10 feet.

FRIDAY
East winds 5 to 15 knots becoming south 15 to 20 knots. Rain showers likely Friday night. Waves 2 to 4 feet.

SATURDAY
Southwest winds 15 to 25 knots becoming west. Rain showers. Waves 3 to 6 feet building to 4 to 7 feet, then subsiding to 3 to 6 feet. Waves occasionally around 9 feet.

SUNDAY
Southwest winds 15 to 25 knots. Waves 3 to 6 feet.

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LOZ064-065-042200
Lake Ontario open waters from Sodus Bay to the Saint Lawrence River
1003 AM EST Wed Mar 4 2026

THIS AFTERNOON
Southwest winds 5 to 10 knots becoming southeast. Waves 1 foot or less.

TONIGHT
Southeast winds 10 knots or less becoming northeast. Waves 1 foot or less.

THURSDAY
Northeast winds 5 to 15 knots increasing to 15 to 20 knots. A chance of rain in the afternoon. Waves 1 to 3 feet building to 2 to 4 feet.

THURSDAY NIGHT
Northeast winds 15 to 20 knots becoming east. Rain with freezing rain likely. Waves 3 to 5 feet subsiding to 2 to 4 feet.

FRIDAY
East winds 10 to 15 knots becoming south and increasing to 15 to 25 knots. Rain showers Friday night. Waves 1 to 3 feet building to 3 to 5 feet.

SATURDAY
South winds 15 to 25 knots becoming west. Rain showers. Waves 3 to 6 feet.

SUNDAY
Southwest winds 10 to 15 knots increasing to 15 to 20 knots. Waves 3 to 5 feet building to 4 to 7 feet. Waves occasionally around 9 feet.

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LOZ061-042200
MAFOR 0416/ ONTARIO WEST 1/2 11600 11800 13200 11100 11210 11220. Waves 2 feet or less this afternoon and tonight. Waves 1 to 2 feet building to 2 to 4 feet Thursday morning.

ONTARIO EAST 1/2 11500 11300 14200 11100 11110. Waves 2 feet or less.