National Weather Service Marine Forecast FZUS61 KBUF

FZUS61 KBUF 162003
GLFSL

Forecast for the Saint Lawrence River
including the Thousand Islands Region
National Weather Service Buffalo NY
403 PM EDT Tue Jun 16 2026

SLZ022-024-170300
Saint Lawrence River from Cape Vincent to Saint Regis 403 PM EDT Tue Jun 16 2026

TONIGHT
Southwest winds 10 knots or less becoming south. Mainly clear this evening, then becoming partly cloudy.

WEDNESDAY
South winds 5 to 10 knots. A chance of showers in the morning, then showers likely with a chance of thunderstorms in the afternoon.

WEDNESDAY NIGHT
South winds 10 knots or less becoming southeast. A chance of showers and thunderstorms in the evening, then showers overnight.

THURSDAY
Southeast winds 15 to 20 knots becoming southwest. Showers with a chance of thunderstorms.

THURSDAY NIGHT
Southwest winds 15 to 20 knots. Showers likely in the evening, then a chance of showers overnight.

FRIDAY
Southwest winds 15 to 20 knots becoming west 10 to 15 knots. Showers with a chance of thunderstorms.

SATURDAY
West winds 5 to 15 knots diminishing to less than 10 knots. Showers likely with a chance of thunderstorms.

SUNDAY
West winds 5 to 10 knots becoming light and variable. A chance of showers.

Winds and waves higher in and near thunderstorms.