246
FZUS61 KBUF 192003
GLFSL

Forecast for the Saint Lawrence River
including the Thousand Islands Region
National Weather Service Buffalo NY
403 PM EDT Sun Jul 19 2026

SLZ022-024-200300-
Saint Lawrence River from Cape Vincent to Saint Regis
403 PM EDT Sun Jul 19 2026

.TONIGHT...West winds 5 to 10 knots becoming light and variable.
Mainly clear.
.MONDAY...Light and variable winds becoming southwest around
10 knots. Sunny.
.MONDAY NIGHT...Southwest winds 10 knots or less becoming south
10 to 15 knots. Mostly cloudy.
.TUESDAY...South winds 10 to 15 knots. A chance of showers in the
morning, then showers with a chance of thunderstorms in the
afternoon.
.TUESDAY NIGHT...South winds 10 to 15 knots becoming southwest.
Showers with a chance of thunderstorms in the evening, then
showers overnight.
.WEDNESDAY...Southwest winds 5 to 15 knots becoming west. Showers
likely with a chance of thunderstorms during the day, then a
chance of showers and thunderstorms Wednesday night.
.THURSDAY...West winds 10 knots or less becoming southwest.
Mainly clear.
.FRIDAY...Southwest winds 10 knots or less becoming west. Mainly
clear, then becoming partly cloudy.

Winds and waves higher in and near thunderstorms.

$$