Great Lakes Forecast
Issued by NWS
Issued by NWS
996 FZUS61 KBUF 261403 GLFLO Open Lake Forecast for Lake Ontario National Weather Service Buffalo NY 1003 AM EDT Sun Jul 26 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 surface high off the New England coast will slowly weaken as it drifts to the Gulf of Saint Lawrence today. A 29.5 inch low will develop over the western Great Lakes tonight into Monday, before strengthening to 29.3 inches while moving southeast into the lower Great Lakes Monday night and Tuesday. A cold front associated with this low will swing across the lake late Tuesday and Tuesday night. The low will then weaken to 29.6 inches while drifting east into New England by Wednesday. LOZ062-262100- Lake Ontario open waters from the Niagara River to Hamlin Beach- 1003 AM EDT Sun Jul 26 2026 .THIS AFTERNOON...West winds 10 knots or less becoming southwest. Waves 1 foot or less. .TONIGHT...Southwest winds 10 knots or less. Waves 1 foot or less. .MONDAY...Southwest winds less than 10 knots becoming east. A chance of showers in the afternoon. Waves 1 foot or less. .MONDAY NIGHT...Southeast winds 5 to 10 knots. Showers with a chance of thunderstorms. Waves 1 foot or less. .TUESDAY...East winds 5 to 15 knots becoming north 15 to 20 knots. Showers with a chance of thunderstorms. Waves 2 feet or less building to 2 to 4 feet. .WEDNESDAY...North winds 15 to 20 knots diminishing to 10 to 15 knots. A chance of showers. Waves 2 to 4 feet subsiding to 1 to 3 feet. .THURSDAY...North winds 5 to 15 knots becoming northwest. Waves 2 feet or less. Winds and waves higher in and near thunderstorms. $$ LOZ063>065-262100- Lake Ontario open waters from Hamlin Beach to the Saint Lawrence River- 1003 AM EDT Sun Jul 26 2026 .THIS AFTERNOON...Southwest winds 10 knots or less. Waves 1 foot or less. .TONIGHT...Southwest winds less than 10 knots. A chance of showers late. Waves 1 foot or less. .MONDAY...Southwest winds 10 knots or less becoming east. A chance of showers in the morning. Waves 1 foot or less. .MONDAY NIGHT...Southeast winds 10 knots or less. A chance of showers in the evening, then showers with a chance of thunderstorms overnight. Waves 1 foot or less. .TUESDAY...Southeast winds 5 to 15 knots becoming northeast 15 to 20 knots. Showers with a chance of thunderstorms. Waves 1 to 3 feet. .WEDNESDAY...North winds 15 to 20 knots diminishing to 10 to 15 knots. Showers likely with a chance of thunderstorms. Waves 2 to 4 feet subsiding to 1 to 3 feet. .THURSDAY...North winds 5 to 15 knots becoming northwest less than 10 knots. Waves 1 to 3 feet subsiding to 1 foot or less. Winds and waves higher in and near thunderstorms. $$ LOZ061-262100- MAFOR 2615/ ONTARIO WEST 1/2 11600 11500 11400 14500 11500. Waves 1 foot or less. ONTARIO EAST 1/2 11500 11600 11500 12400 13500. Waves 1 foot or less. $$