Marine Weather Net

E Gulf from 22N to 25N E of 87W including Straits of Florida Offshore Forecast


TODAY

N
WINDS
10
KNOTS

TONIGHT

NE
WINDS
10
KNOTS

SAT

ENE
WINDS
10
KNOTS

SAT NIGHT

ENE
WINDS
10
KNOTS

The Marine Weather Forecast In Detail:
GMZ047 Forecast Issued: 331 AM EDT Fri Oct 31 2025

Today...N Winds 10 Kt. Seas 5 To 7 Ft In W To Nw Swell.
Tonight...Ne Winds 10 Kt. Seas 3 To 5 Ft.
Sat...Ne To E Winds 10 Kt. Seas 2 To 4 Ft.
Sat Night...Ne To E Winds 10 Kt. Seas 3 Ft Or Less. Scattered Showers And Isolated Tstms.
Sun...S Of 24n, Variable Winds Less Than 5 Kt. N Of 24n, E Winds 10 To 15 Kt, Shifting To Se In The Afternoon. Seas 3 Ft Or Less.
Sun Night...Nw To N Winds 10 Kt. Seas 3 Ft Or Less.
Mon...N Winds 10 To 15 Kt. Seas 2 To 4 Ft.
Mon Night...N Winds 15 Kt. Seas 4 To 6 Ft.
Tue...N To Ne Winds 15 Kt. Seas 4 To 6 Ft.
Tue Night...Ne Winds 10 To 15 Kt. Seas 4 To 6 Ft.
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Area Forecast Discussion
National Weather Service Key West FL
347am EDT Fri Oct 31 2025

Issued at 347am EDT Fri Oct 31 2025

Northwest winds quickly slackened after sunset last night and continued through the overnight. Current speeds are generally 10 to 15 knots this hour and will continue to gradually fall through the day. Meanwhile, shallow cool air advection continues to filter in behind yesterday's front. This continues to produce shallow, light showers. On occasion some of these showers (or really sprinkles) have moved across the island chain but with no measurable rainfall. Lastly, we continue to relish in the lower, more comfortable dew points of lower to mid 60s.

High pressure is moving in behind the front and will skirt eastward across the Gulf and into the Southeast U.S. today through Sunday. This will allow for north to northeast winds to peak overnight and then lull during the late morning and afternoon, starting tonight.

Beginning Monday the pattern remains messy. The GFS (Global Forecast System) and ECMWF (European Centre for Medium-Range Weather Forecasts) continue to show an upper level trough dropping out of Canada and digging into the Lower Mississippi Valley by late Saturday. Afterwards, however, they differ on 1) what happens to the upper level trough and 2) does a surface reflection take shape. This will ultimately determine the winds across the Florida Keys for early next week. For now, continue to thread a middle of the road approach with enhanced northerly winds. Regardless of solution, the next cold front will sweep through with another brief shot at more comfortable dew points and some light showers.

The next high pressure will build in behind the front and winds will gradually become more easterly towards the end of next week.

Marine
Issued at 347am EDT Fri Oct 31 2025

High pressure builds in today, which will allow breezes to continue slackening through this afternoon. As the high slides further east towards and over the Atlantic, expect peaks and lulls in winds over the weekend. A developing low pressure system over the Southeast may freshen winds again for early next week.

Climate
On this day in 2017, the daily record low temperature of 60F was recorded in Key West. Temperature records for Key West date back to 1872.

NOAA Key West FL Office: Watches - Warnings - Advisories
FL...Coastal Flood Advisory for FLZ076. GM...None.