FZUS61 KBUF 142003 GLFLO Open Lake Forecast for Lake Ontario National Weather Service Buffalo NY 403 PM 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 will exit across the Canadian Maritimes 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 Tuesday. This low will sweep a strong cold front across the lake Monday afternoon, with a 30.4 inch high 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. LOZ062-150300- Lake Ontario open waters from the Niagara River to Hamlin Beach- 403 PM EDT Sat Mar 14 2026 .TONIGHT...Northwest winds 15 to 20 knots becoming east 5 to 15 knots. A chance of snow showers late. Waves 4 to 7 feet subsiding to 2 feet or less. Waves occasionally around 9 feet. .SUNDAY...East winds 15 to 20 knots increasing to 30 knots. Snow likely in the morning. Waves 2 to 4 feet building to 5 to 8 feet. Waves occasionally around 10 feet. .SUNDAY NIGHT...Southeast winds to 30 knots. Waves 5 to 8 feet. Waves occasionally around 10 feet. .MONDAY...Southeast winds to 30 knots becoming southwest. Rain showers in the morning, then rain and snow showers in the afternoon. Waves 5 to 8 feet building to 7 to 10 feet. Waves occasionally around 13 feet. .MONDAY NIGHT...Southwest gales to 35 knots becoming west. Snow and rain showers in the evening, then a chance of snow showers overnight. Waves 10 to 14 feet building to 11 to 15 feet. Waves occasionally around 19 feet. .TUESDAY...West gales to 35 knots diminishing to 15 to 20 knots. A chance of snow showers. Waves 10 to 15 feet subsiding to 4 to 7 feet. Waves occasionally around 19 feet. .WEDNESDAY...Southwest winds 10 to 15 knots becoming south. Waves 2 to 4 feet subsiding to 1 to 2 feet. .THURSDAY...South winds 5 to 15 knots becoming southwest. A chance of rain showers Thursday night. Waves 1 to 2 feet. $$ LOZ063>065-150300- Lake Ontario open waters from Hamlin Beach to the Saint Lawrence River- 403 PM EDT Sat Mar 14 2026 ...GALE WARNING IN EFFECT UNTIL 5 PM EDT THIS AFTERNOON... .TONIGHT...West winds to 30 knots becoming east and diminishing to 5 to 10 knots after midnight. Waves 10 to 13 feet subsiding to 1 to 3 feet. Waves occasionally around 16 feet. .SUNDAY...Southeast winds 15 to 25 knots. Snow likely in the morning. Waves 1 to 3 feet building to 4 to 7 feet. Waves occasionally around 9 feet. .SUNDAY NIGHT...Southeast winds to 30 knots increasing to 35 knot gales. Waves 5 to 8 feet building to 7 to 10 feet. Waves occasionally around 13 feet. .MONDAY...Southeast gales to 35 knots becoming southwest and diminishing to 30 knots in the afternoon. Showers. Waves 6 to 10 feet subsiding to 5 to 8 feet. Waves occasionally around 13 feet. .MONDAY NIGHT...West winds to 30 knots increasing to 40 knot gales. Rain and snow showers in the evening, then snow showers overnight. Waves 7 to 10 feet building to 11 to 16 feet. Waves occasionally around 20 feet. .TUESDAY...West gales to 40 knots becoming northwest and diminishing to 15 to 25 knots. Lake effect snow showers. Waves 13 to 17 feet subsiding to 7 to 10 feet. Waves occasionally around 22 feet. .WEDNESDAY...West winds 5 to 15 knots becoming south 15 to 20 knots. Waves 3 to 6 feet subsiding to 3 to 5 feet. .THURSDAY...South winds 15 to 20 knots becoming southwest. A chance of rain showers Thursday night. Waves 3 to 5 feet subsiding to 2 to 4 feet. $$ LOZ061-150300- MAFOR 1421/ ONTARIO WEST 1/2 11630 11720 11800 11200 11220 11237 12230. Waves 6 to 10 feet subsiding to 1 to 3 feet, and occasionally around 13 feet tonight. Waves 2 to 4 feet building to 5 to 8 feet, and occasionally around 10 feet Sunday. ONTARIO EAST 1/2 11640 11730 11710 11200 11310 11320 12330. A chance of snow Sunday morning. Waves 10 to 14 feet subsiding to 1 to 3 feet, and occasionally around 18 feet tonight. Waves 2 feet or less building to 4 to 7 feet, and occasionally around 9 feet Sunday. $$