National Weather Service Marine Forecast FZUS61 KBUF

FZUS61 KBUF 172005
GLFSL

Forecast for the Saint Lawrence River
including the Thousand Islands Region
National Weather Service Buffalo NY
404 PM EDT Fri Apr 17 2026

SLZ022-024-180300
Saint Lawrence River from Cape Vincent to Saint Regis 404 PM EDT Fri Apr 17 2026

TONIGHT
Northeast winds less than 10 knots. Mainly clear.

SATURDAY
Southeast winds 5 to 10 knots becoming south and increasing to 15 to 20 knots. A chance of showers late.

SATURDAY NIGHT
South winds 15 to 20 knots becoming west 10 to 15 knots. Rain showers.

SUNDAY
West winds 10 to 15 knots. Rain showers in the morning, then a chance of rain showers in the afternoon.

SUNDAY NIGHT
West winds 5 to 15 knots becoming northwest. Partly cloudy.

MONDAY
Northwest winds 10 knots or less becoming southwest. Partly cloudy, then becoming mainly clear.

TUESDAY
South winds 5 to 10 knots becoming west. A chance of rain showers.

WEDNESDAY
Northwest winds 10 knots or less. Partly cloudy.