Great Lakes Forecast
Issued by NWS
Issued by NWS
372 FZUS61 KBUF 292003 GLFSL Forecast for the Saint Lawrence River including the Thousand Islands Region National Weather Service Buffalo NY 403 PM EDT Thu Oct 29 2026 SLZ022-024-300300- Saint Lawrence River from Cape Vincent to Saint Regis 403 PM EDT Thu Oct 29 2026 .TONIGHT...Southwest winds 5 to 15 knots becoming west. A chance of showers this evening. .FRIDAY...West winds 5 to 15 knots becoming northwest. Partly sunny in the morning, then becoming mostly cloudy. .FRIDAY NIGHT...Northwest winds 10 knots or less. Mostly cloudy in the evening, then clearing. .SATURDAY...Light and variable winds. Sunny. .SATURDAY NIGHT...Southwest winds less than 10 knots. Mainly clear. .SUNDAY...Southwest winds 10 knots or less. Mainly clear, then becoming partly cloudy. .MONDAY...Southwest winds 5 to 10 knots becoming light and variable. Mostly cloudy. .TUESDAY...East winds 10 knots or less becoming southeast. A chance of showers Tuesday night. $$