


Great Lakes Forecast
Issued by NWS
Issued by NWS
378 FZUS61 KBUF 172002 GLFSL Forecast for the Saint Lawrence River including the Thousand Islands Region National Weather Service Buffalo NY 402 PM EDT Tue Jun 17 2025 SLZ022-024-180300- Saint Lawrence River from Cape Vincent to Saint Regis 402 PM EDT Tue Jun 17 2025 .TONIGHT...South winds 5 to 10 knots becoming southwest. Mostly cloudy. .WEDNESDAY...Southwest winds 5 to 10 knots. A chance of showers and thunderstorms in the afternoon. .WEDNESDAY NIGHT...Southwest winds 10 knots or less becoming south. A chance of showers and thunderstorms. .THURSDAY...South winds 5 to 15 knots becoming southwest. Showers with a chance of thunderstorms. .THURSDAY NIGHT...West winds 5 to 15 knots. Showers in the evening, then a chance of showers overnight. .FRIDAY...West winds 10 knots or less becoming southwest. A chance of showers and thunderstorms. .SATURDAY...Southwest winds 5 to 10 knots. A chance of showers and thunderstorms. .SUNDAY...Southwest winds 5 to 10 knots. A chance of showers during the day. Winds and waves higher in and near thunderstorms. $$