Marine Weather Net

Straits of Florida from Halfmoon Shoal to 20 NM west of Dry Tortugas out 20 to 60 NM Marine Forecast


OVERNIGHT

NNW
WINDS
15
KNOTS

THURSDAY

N
WINDS
10 - 15
KNOTS

THURSDAY NIGHT

N
WINDS
10
KNOTS

FRIDAY

NE
WINDS
5 KNOTS

The Marine Weather Forecast In Detail:
GMZ075 Forecast Issued: 1020 PM EST Wed Dec 31 2025

Overnight...Northwest To North Winds Near 15 Knots. Seas 3 To 4 Feet, Occasionally To 5 Feet. Wave Detail: North 3 Feet At 7 Seconds.
Thursday...North Winds 10 To 15 Knots, Decreasing To Near 10 Knots. Seas 2 To 4 Feet, Occasionally To 5 Feet, Subsiding To 2 To 3 Feet. Wave Detail: North 3 Feet At 6 Seconds.
Thursday Night...North Winds Near 10 Knots, Becoming North To Northeast. Seas Around 2 Feet. Wave Detail: Northwest 2 Feet At 6 Seconds And Northeast 2 Feet At 6 Seconds.
Friday...Northeast Winds Near 5 Knots, Becoming Variable. Seas 1 To 2 Feet.
Friday Night...Variable Winds Near 5 Knots. Seas 1 To 2 Feet.
Saturday...Variable Winds Near 5 Knots. Seas 1 To 2 Feet.
Saturday Night...Variable Winds Near 5 Knots, Becoming Southwest To West 5 To 10 Knots. Seas 1 To 2 Feet.
Sunday...Southwest To West Winds Near 10 Knots, Becoming West To Northwest Near 15 Knots. Seas 1 To 2 Feet, Building To 2 To 3 Feet. Isolated Showers.
Sunday Night...Northwest Winds 10 To 15 Knots. Seas 2 To 3 Feet. Isolated Showers.
Monday...North Winds 10 To 15 Knots. Seas 2 To 3 Feet.
Monday Night...Northeast Winds Near 10 Knots. Seas 2 To 3 Feet.
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Area Forecast Discussion
National Weather Service Key West FL
1053pm EST Wednesday Dec 31 2025

Issued at 1053pm EST Wednesday Dec 31 2025

Another quiet post-frontal night across the Florida Keys. High pressure moving across the Gulf Basin is maintaining a northwest to north wind over the island chain and surrounding coastal waters. Tonight winds are lighter than yesterday, but continued cold air advection means that overnight lows will be a tad colder than last night. If heading out for New Year's celebrations, make sure to have a light jacket handy, just in case. Otherwise, radar continues to be void of any precipitation.

Marine
Issued at 1053pm EST Wednesday Dec 31 2025

Gentle to moderate northwest to north breezes will continue for the overnight and into early Thursday morning. A minor nocturnal surge is possible across the waters immediately downwind of the mainland. This may result in a brief period of moderate to fresh breezes across the easternmost Straits of Florida and Hawk Channel waters. Confidence is still too low to make any updates to the coastal waters forecast at this time. Otherwise, an approaching high pressure from the central Gulf Basin will lead to generally slackening breezes through the end of the week and into the weekend. Watching for a weak frontal passage Sunday evening with winds returning from the north.

NOAA Key West FL Office: Watches - Warnings - Advisories
FL...None. GM...None.