NWS Key West

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Last Map Update: Mon, Dec 29, 2025 at 9:56:47 pm EST

Watches, Warnings & Advisories

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Small Craft Advisory

Cold Front Before New Years Eve

Island Chain

Marine Winds

Wave Heights

Cold Frontal Passage for Year's End. Breezy conditions and lows in the 50s expected. A potent arctic air mass will surge south into the eastern US. A dry cold front is forecast to cross the Keys on Tuesday. Anticipate the coldest temperatures of the season so far across the island chain

LOWER & MIDDLE KEYS: Tonight...Partly cloudy. Lows in the mid to upper 60s. Northwest winds 5 to 10 mph, increasing to near 10 mph late. Becoming breezing Tuesday! UPPER KEYS: Tonight... Mostly clear. Lows in the mid to upper 60s. Northwest winds 5 to 10 mph. Becoming breezy Tuesday night!

SMALL CRAFT SHOULD EXERCISE CAUTION: SE GULF, DUE TO INCREASING WINDS! Small Craft Advisory may be required Tuesday! Tonight... W-NW light to gentle breezes, increasing to ~10 knots (NW-N for the Florida Straits; becoming N 15-20 kts for the SE Gulf overnight). Seas around or building to ~1 ft (building to 1-2 ft Eastern Straits; 2-3 ft SE Gulf). Bay and nearshore waters smooth a light chop, becoming a light chop. Isolated showers.

SMALL CRAFT SHOULD EXERCISE CAUTION: SE GULF, DUE TO INCREASING WINDS! Small Craft Advisory may be required Tuesday! Tonight... W-NW light to gentle breezes, increasing to ~10 knots (NW-N for the Florida Straits; becoming N 15-20 kts for the SE Gulf overnight). Seas around or building to ~1 ft (building to 1-2 ft Eastern Straits; 2-3 ft SE Gulf). Bay and nearshore waters smooth a light chop, becoming a light chop. Isolated showers.

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Heavy Lake Effect Snow; Subfreezing Temperatures in the Eastern U.S.

NWS Key West