FZUS61 KBUF 060803 GLFSL Forecast for the Saint Lawrence River including the Thousand Islands Region National Weather Service Buffalo NY 402 AM EDT Sat Jun 6 2026 SLZ022-024-061500- Saint Lawrence River from Cape Vincent to Saint Regis 403 AM EDT Sat Jun 6 2026 .TODAY...South winds 5 to 15 knots becoming southwest. Showers early, then showers likely late this morning. Showers likely with a chance of thunderstorms this afternoon. .TONIGHT...Southwest winds 5 to 15 knots becoming west. Showers with a chance of thunderstorms early, then showers likely late in the evening. A chance of showers after midnight. .SUNDAY...Northwest winds 5 to 10 knots becoming north. A chance of showers. .SUNDAY NIGHT...North winds less than 10 knots. Partly cloudy in the evening, then becoming mainly clear. .MONDAY...Light and variable winds. Mainly clear. .TUESDAY...Light and variable winds. Clear, then becoming partly cloudy. .WEDNESDAY...South winds less than 10 knots. A chance of showers and thunderstorms. Winds and waves higher in and near thunderstorms. $$