FZUS61 KBUF 151403 GLFSL Forecast for the Saint Lawrence River including the Thousand Islands Region National Weather Service Buffalo NY 1003 AM EDT Thu Oct 15 2026 SLZ022-024-152100- Saint Lawrence River from Cape Vincent to Saint Regis 1003 AM EDT Thu Oct 15 2026 .THIS AFTERNOON...Northeast winds 10 knots or less. Partly to mostly sunny. .TONIGHT...Northeast winds 5 to 10 knots becoming east. A chance of rain showers after midnight. Periods of rain late. .FRIDAY...Southeast winds 10 to 15 knots becoming west 15 to 20 knots. Periods of rain. .FRIDAY NIGHT...Northwest winds 10 to 15 knots increasing to 15 to 20 knots. Rain likely in the evening. .SATURDAY...Northwest winds 15 to 20 knots becoming southwest and diminishing to 10 knots or less. Becoming mainly clear. .SUNDAY...Southwest winds 5 to 15 knots. Mainly clear. .MONDAY...Southwest winds 5 to 15 knots diminishing to less than 10 knots. Mainly clear, then becoming partly cloudy. $$