FZUS61 KBUF 070803 GLFSL Forecast for the Saint Lawrence River including the Thousand Islands Region National Weather Service Buffalo NY 403 AM EDT Thu May 7 2026 SLZ022-024-071500- Saint Lawrence River from Cape Vincent to Saint Regis 403 AM EDT Thu May 7 2026 .TODAY...Southwest winds 5 to 10 knots becoming west. Sunny this morning, then becoming partly sunny. .TONIGHT...Southwest winds 10 knots or less becoming west. Partly to mostly cloudy. .FRIDAY...West winds 10 knots or less becoming southwest. Mostly sunny. .FRIDAY NIGHT...Southwest winds 10 knots or less becoming south. Mainly clear in the evening, then becoming partly cloudy. .SATURDAY...South winds 10 knots or less increasing to 10 to 15 knots. A chance of rain showers. .SUNDAY...Southwest winds 5 to 15 knots becoming west less than 10 knots. A chance of rain showers during the day. .MONDAY...Northwest winds 10 knots or less. A chance of rain showers. $$