Great Lakes Forecast
Issued by NWS
Issued by NWS
475 FZUS61 KBUF 040803 GLFSL Forecast for the Saint Lawrence River including the Thousand Islands Region National Weather Service Buffalo NY 403 AM EDT Thu Jun 4 2026 SLZ022-024-041500- Saint Lawrence River from Cape Vincent to Saint Regis 403 AM EDT Thu Jun 4 2026 .TODAY...Southwest winds 5 to 15 knots. Sunny. .TONIGHT...Southwest winds 10 knots or less. Partly to mostly cloudy. .FRIDAY...Southwest winds 5 to 10 knots. Partly sunny. .FRIDAY NIGHT...Southwest winds 5 to 10 knots. Showers likely overnight. .SATURDAY...Southwest winds 10 knots or less becoming west. Showers with a chance of thunderstorms. .SUNDAY...North winds 10 knots or less becoming northeast. A chance of showers during the day. .MONDAY...Northeast winds less than 10 knots. Mainly clear. Winds and waves higher in and near thunderstorms. $$