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National Weather Service Marine Forecast FZUS61 KBUF

FZUS61 KBUF 140803
GLFLO

Open Lake Forecast for Lake Ontario
National Weather Service Buffalo NY
403 AM EDT Sat Mar 14 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 29.5 inch low over the Ottawa Valley this morning will continue east to the Canadian Maritimes by this evening as a 30.4 inch high builds into the central Great Lakes, then across the lake tonight before moving east of the lake Sunday. Meanwhile, a 29.5 inch surface low over the mid Mississippi Valley Sunday morning will track northeastward and deepen to 28.9 inches just to the west of the lake Monday morning, before pushing northeastward across Quebec through the remainder of Monday and Tuesday. This low will sweep a strong cold front across the lake Monday afternoon, with a 30.4 inch high then building across the Great Lakes and Ohio Valley Tuesday. The high will then shift east of the lake Wednesday and reach the East Coast by Wednesday evening.

LOZ062-141500
Lake Ontario open waters from the Niagara River to Hamlin Beach
403 AM EDT Sat Mar 14 2026

GALE WARNING IN EFFECT UNTIL 11 AM EDT THIS MORNING

TODAY
West gales to 35 knots diminishing to 30 knots. Snow showers likely early. Waves 12 to 16 feet subsiding to 7 to 10 feet. Waves occasionally around 20 feet.

TONIGHT
Northwest winds 15 to 25 knots becoming east and diminishing to 10 to 15 knots. Snow late. Waves 5 to 8 feet subsiding to 2 feet or less. Waves occasionally around 10 feet.

SUNDAY
East winds 15 to 25 knots. Snow. Waves 2 to 4 feet building to 5 to 8 feet. Waves occasionally around 10 feet.

SUNDAY NIGHT
Southeast winds to 30 knots becoming south. Waves 4 to 7 feet. Waves occasionally around 9 feet.

MONDAY
Southeast winds to 30 knots becoming southwest and increasing to 40 knot gales. Rain showers during the day, then snow and rain showers Monday night. Waves 4 to 7 feet building to 10 to 15 feet. Waves occasionally around 19 feet.

TUESDAY
West gales to 40 knots diminishing to 15 to 25 knots. A chance of snow showers. Waves 12 to 16 feet subsiding to 5 to 8 feet. Waves occasionally around 20 feet.

WEDNESDAY
West winds 15 to 20 knots becoming south 10 to 15 knots. Waves 2 to 4 feet subsiding to 1 to 2 feet.

LOZ063>065-141500
Lake Ontario open waters from Hamlin Beach to the Saint Lawrence River
403 AM EDT Sat Mar 14 2026

GALE WARNING IN EFFECT THROUGH THIS AFTERNOON

TODAY
West gales to 40 knots diminishing to 35 knots. Snow showers early, then a chance of snow showers. Waves 13 to 18 feet subsiding to 11 to 15 feet. Waves occasionally around 23 feet.

TONIGHT
West winds to 30 knots becoming east and diminishing to 5 to 10 knots after midnight. Waves 10 to 14 feet subsiding to 1 to 3 feet. Waves occasionally around 18 feet.

SUNDAY
East winds 15 to 25 knots becoming southeast. A chance of snow. Waves 1 to 3 feet building to 4 to 7 feet. Waves occasionally around 9 feet.

SUNDAY NIGHT
Southeast winds to 30 knots increasing to 35 knot gales. Waves 5 to 8 feet building to 7 to 10 feet. Waves occasionally around 13 feet.

MONDAY
Southeast gales to 35 knots becoming southwest to 40 knots. Rain showers during the day, then rain and snow showers Monday night. Waves 7 to 10 feet building to 12 to 16 feet. Waves occasionally around 20 feet.

TUESDAY
West gales to 40 knots becoming northwest and diminishing to 30 knots. A chance of snow showers. Waves 14 to 18 feet subsiding to 8 to 11 feet. Waves occasionally around 23 feet.

WEDNESDAY
West winds 15 to 20 knots becoming south. Waves 3 to 5 feet subsiding to 1 to 3 feet.

LOZ061-141500
MAFOR 1409/ ONTARIO WEST 1/2...GALE WARNING IN EFFECT...13650 12640 11710 11800 11200. A chance of snow showers this morning. A chance of snow overnight. Waves 11 to 16 feet subsiding to 10 to 14 feet, and occasionally around 20 feet today. Waves 6 to 9 feet subsiding to 1 to 3 feet, and occasionally around 11 feet tonight.

ONTARIO EAST 1/2...GALE WARNING IN EFFECT...11657 13650 11640 11720 11700 11100. Waves 11 to 15 feet building to 13 to 18 feet, then subsiding to 11 to 15 feet, and occasionally around 23 feet today. Waves 10 to 14 feet subsiding to 1 to 3 feet, and occasionally around 18 feet tonight.