Great Lakes Forecast
Issued by NWS
Issued by NWS
028 FZUS61 KBUF 062003 GLFSL Forecast for the Saint Lawrence River including the Thousand Islands Region National Weather Service Buffalo NY 403 PM EDT Thu Aug 6 2026 SLZ022-024-070300- Saint Lawrence River from Cape Vincent to Saint Regis 403 PM EDT Thu Aug 6 2026 .TONIGHT...Southwest winds 5 to 10 knots becoming light and variable. Partly cloudy. .FRIDAY...Light and variable winds. Partly to mostly sunny. .FRIDAY NIGHT...Light and variable winds. A chance of showers in the evening, then showers likely overnight. .SATURDAY...South winds 10 knots or less becoming southwest. Showers likely in the morning, then showers likely with a chance of thunderstorms in the afternoon. .SATURDAY NIGHT...Southwest winds 5 to 10 knots. Showers likely with a chance of thunderstorms. .SUNDAY...West winds 10 knots or less becoming southwest. Mainly clear, then becoming partly cloudy. .MONDAY...Southwest winds 10 knots or less. Showers likely with a chance of thunderstorms. .TUESDAY...West winds less than 10 knots. Showers likely with a chance of thunderstorms during the day, then a chance of showers and thunderstorms Tuesday night. Winds and waves higher in and near thunderstorms. $$