National Weather Service Marine Forecast FZUS61 KBUF

FZUS61 KBUF 242003
GLFSL

Forecast for the Saint Lawrence River
including the Thousand Islands Region
National Weather Service Buffalo NY
403 PM EDT Mon Aug 24 2026

SLZ022-024-250300
Saint Lawrence River from Cape Vincent to Saint Regis 403 PM EDT Mon Aug 24 2026

TONIGHT
Southwest winds 5 to 15 knots becoming west less than 10 knots. Showers likely with a chance of thunderstorms early, then showers likely late this evening. A chance of showers after midnight.

TUESDAY
West winds less than 10 knots. A chance of showers in the afternoon.

TUESDAY NIGHT
West winds less than 10 knots. Partly to mostly cloudy.

WEDNESDAY
Light and variable winds becoming southwest 5 to 10 knots. Mostly sunny.

WEDNESDAY NIGHT
South winds 10 knots or less. Partly cloudy.

THURSDAY
South winds 5 to 15 knots becoming southwest less than 10 knots. Showers likely with a chance of thunderstorms.

FRIDAY
West winds 10 knots or less becoming northwest. A chance of showers during the day.

SATURDAY
Light and variable winds. Partly cloudy.

Winds and waves higher in and near thunderstorms.