FZUS61 KBUF 152003 GLFSL Forecast for the Saint Lawrence River including the Thousand Islands Region National Weather Service Buffalo NY 403 PM EDT Thu Oct 15 2026 SLZ022-024-160300- Saint Lawrence River from Cape Vincent to Saint Regis 403 PM EDT Thu Oct 15 2026 .TONIGHT...Northeast winds 5 to 10 knots becoming east. Rain after midnight. .FRIDAY...Southeast winds 10 to 15 knots becoming west 15 to 20 knots. Rain in the morning, then rain likely in the afternoon. .FRIDAY NIGHT...Northwest winds 15 to 20 knots. Mostly cloudy. .SATURDAY...Northwest winds 15 to 20 knots becoming west 5 to 15 knots. Sunny. .SATURDAY NIGHT...West winds 10 knots or less becoming southwest. Mainly clear in the evening, then becoming partly cloudy. .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. .TUESDAY...Light and variable winds. Becoming mainly clear. $$