FZUS61 KBUF 160803 GLFSL Forecast for the Saint Lawrence River including the Thousand Islands Region National Weather Service Buffalo NY 403 AM EDT Fri Oct 16 2026 SLZ022-024-161500- Saint Lawrence River from Cape Vincent to Saint Regis 403 AM EDT Fri Oct 16 2026 .TODAY...Southeast winds 15 to 20 knots becoming west 10 to 15 knots. Periods of rain. .TONIGHT...Northwest winds 10 to 15 knots. A chance of rain showers early. .SATURDAY...Northwest winds 5 to 15 knots. Mostly sunny. .SATURDAY NIGHT...West winds less than 10 knots becoming southwest. Mainly clear. .SUNDAY...Southwest winds 5 to 15 knots. Mainly clear. .MONDAY...Southwest winds 5 to 10 knots becoming light and variable. Mainly clear. .TUESDAY...Light and variable winds. Mainly clear. $$