National Weather Service Marine Forecast FZUS61 KBUF

FZUS61 KBUF 200203
GLFSL

Forecast for the Saint Lawrence River
including the Thousand Islands Region
National Weather Service Buffalo NY
1003 PM EDT Fri Jun 19 2026

SLZ022-024-200900
Saint Lawrence River from Cape Vincent to Saint Regis 1003 PM EDT Fri Jun 19 2026

OVERNIGHT
West winds 5 to 15 knots. A chance of showers.

SATURDAY
West winds 5 to 10 knots. A chance of showers late in the morning. A chance of showers and thunderstorms early in the afternoon, then showers likely with a chance of thunderstorms late.

SATURDAY NIGHT
West winds 5 to 10 knots becoming light and variable. A chance of showers and thunderstorms in the evening, then a chance of showers overnight.

SUNDAY
Southwest winds 10 knots or less becoming west. A chance of showers in the morning, then showers likely with a chance of thunderstorms in the afternoon.

SUNDAY NIGHT
Southwest winds less than 10 knots. Showers likely with a chance of thunderstorms in the evening.

MONDAY
South winds less than 10 knots becoming northwest. Showers likely.

TUESDAY
Northwest winds less than 10 knots. Partly cloudy.

WEDNESDAY
West winds less than 10 knots. Partly cloudy.

Winds and waves higher in and near thunderstorms.