FZUS61 KBUF 032002 GLFSL Forecast for the Saint Lawrence River including the Thousand Islands Region National Weather Service Buffalo NY 402 PM EDT Thu Jul 3 2025 SLZ022-024-040300- Saint Lawrence River from Cape Vincent to Saint Regis 402 PM EDT Thu Jul 3 2025 .TONIGHT...Northwest winds 10 knots or less. Partly cloudy early, then becoming mainly clear. .FRIDAY...Northwest winds less than 10 knots becoming west. Sunny. .FRIDAY NIGHT...South winds less than 10 knots. Mainly clear in the evening, then becoming mostly cloudy. .SATURDAY...South winds 10 knots or less becoming southwest. Partly sunny. .SATURDAY NIGHT...Southwest winds 5 to 10 knots. Partly to mostly cloudy. .SUNDAY...Southwest winds 5 to 10 knots. A chance of showers. .MONDAY...Southwest winds 10 knots or less becoming north. A chance of showers and thunderstorms. .TUESDAY...North winds less than 10 knots becoming northeast. Partly cloudy. Winds and waves higher in and near thunderstorms. $$