Isaias Expected To Be A Strong Hurricane Approaching The Northern Gulf Coast Friday

Isaias is expected to strengthen and be a strong hurricane when it approaches the northern Gulf Coast on Friday. Damaging hurricane-force winds and life-threatening storm surge impacts are expected Friday into Saturday. Isaias will bring heavy rainfall to the northern Gulf Coast and much of the Southeast U.S. Friday into the weekend. Read More >

Last Update: 426 AM EDT Thu Oct 8 2026

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Key West, FL Local Forecast Office

33NM S Sand Key Light FL

Marine Zone Forecast

Today

South winds near 10 knots, except 5 to 10 knots off the upper keys, becoming southeast to south. Seas 1 to 2 feet. Wave detail: south 1 foot at 3 seconds. A slight chance of showers and thunderstorms, mainly this morning.

Tonight

East to southeast winds 5 to 10 knots, becoming southeast and increasing to 10 to 15 knots after midnight. Seas 1 to 2 feet, building to 2 to 3 feet. Wave detail: southeast 2 feet at 4 seconds. A chance of showers with a slight chance of thunderstorms.

Friday

Southeast winds near 15 knots. Seas 2 to 3 feet, building to 3 to 4 feet, occasionally to 5 feet. West of halfmoon shoal light, seas 3 to 4 feet, occasionally to 5 feet, building to 4 to 6 feet, occasionally to 8 feet due to a west swell. Wave detail: east to southeast 3 feet at 4 seconds and southwest to west 2 feet at 11 seconds. A chance of showers with a slight chance of thunderstorms.

Friday Night

Southeast winds near 15 knots. Seas 4 to 5 feet, occasionally to 6 feet due to a west swell. Showers likely with a chance of thunderstorms.

Saturday

Southeast to south winds near 15 knots, becoming southeast and decreasing to 10 to 15 knots. Seas 3 to 5 feet, occasionally to 6 feet. A chance of showers and thunderstorms.

Saturday Night

East to southeast winds 10 to 15 knots, increasing to 15 to 20 knots after midnight. Seas 3 to 4 feet, occasionally to 5 feet, building to 4 to 5 feet, occasionally to 6 feet. A chance of showers and thunderstorms.

Sunday

East to southeast winds near 15 knots, decreasing to 10 to 15 knots. Seas 3 to 5 feet, occasionally to 6 feet, subsiding to 2 to 4 feet, occasionally to 5 feet. A slight chance of showers and thunderstorms.

Sunday Night

East winds 10 to 15 knots, decreasing to near 10 knots. Seas 2 to 3 feet. A slight chance of showers and thunderstorms.

Monday

Northeast to east winds 5 to 10 knots. Seas around 2 feet. A slight chance of showers.

Monday Night

Northeast to east winds 5 to 10 knots. Seas 1 to 2 feet. A slight chance of showers and thunderstorms.