Great Lakes Forecast
Issued by NWS
Issued by NWS
592 FZUS61 KBUF 262003 GLFSL Forecast for the Saint Lawrence River including the Thousand Islands Region National Weather Service Buffalo NY 403 PM EDT Sun Jul 26 2026 SLZ022-024-270300- Saint Lawrence River from Cape Vincent to Saint Regis 403 PM EDT Sun Jul 26 2026 .TONIGHT...Southwest winds less than 10 knots. Scattered showers and thunderstorms early. .MONDAY...South winds 10 knots or less becoming southwest. Scattered showers and thunderstorms from late morning on. .MONDAY NIGHT...Southwest winds less than 10 knots. Scattered thunderstorms with a chance of showers in the evening, then showers likely overnight. .TUESDAY...Southeast winds less than 10 knots becoming east. Showers with a chance of thunderstorms. .TUESDAY NIGHT...Northeast winds 10 knots or less. Showers with a chance of thunderstorms in the evening, then showers likely overnight. .WEDNESDAY...Northeast winds 5 to 10 knots becoming north. Showers with a chance of thunderstorms. .THURSDAY...North winds 5 to 10 knots becoming light and variable. A chance of showers. .FRIDAY...Light and variable winds. Mainly clear, then becoming partly cloudy. Winds and waves higher in and near thunderstorms. $$