Marine Weather Net

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


THIS AFTERNOON

ESE
WINDS
20
KNOTS

TONIGHT

ESE
WINDS
15 - 20
KNOTS

WEDNESDAY

ESE
WINDS
15 - 20
KNOTS

WEDNESDAY NIGHT

ESE
WINDS
10 - 15
KNOTS

The Marine Weather Forecast In Detail:
GMZ055 Forecast Issued: 1019 AM EDT Tue May 26 2026

SMALL CRAFT ADVISORY IN EFFECT
This Afternoon...East To Southeast Winds Near 20 Knots. Seas 5 To 7 Feet, Occasionally To 9 Feet. Wave Detail: East To Southeast 6 Feet At 6 Seconds. A Slight Chance Of Showers And Thunderstorms.
Tonight...East To Southeast Winds 15 To 20 Knots. Seas 4 To 6 Feet, Occasionally To 8 Feet. Wave Detail: East To Southeast 5 Feet At 6 Seconds. A Chance Of Showers And Thunderstorms.
Wednesday...East To Southeast Winds 15 To 20 Knots, Decreasing To 10 To 15 Knots. Seas 3 To 5 Feet, Occasionally To 6 Feet. Wave Detail: East To Southeast 5 Feet At 6 Seconds. A Chance Of Showers And Thunderstorms.
Wednesday Night...East To Southeast Winds 10 To 15 Knots. Seas 2 To 3 Feet. A Chance Of Showers And Thunderstorms.
Thursday...East To Southeast Winds 10 To 15 Knots, Decreasing To Near 10 Knots. Seas 2 To 3 Feet, Subsiding To Around 2 Feet. A Chance Of Showers And Thunderstorms.
Thursday Night...East To Southeast Winds 5 To 10 Knots. Seas 1 To 2 Feet. A Slight Chance Of Showers And Thunderstorms.
Friday...Southeast Winds 5 To 10 Knots. Seas 1 To 2 Feet. A Chance Of Showers With A Slight Chance Of Thunderstorms.
Friday Night...Southeast Winds 5 To 10 Knots. Seas 1 To 2 Feet. A Chance Of Showers And Thunderstorms.
Saturday...Southeast To South Winds Near 10 Knots. Seas 1 To 2 Feet, Building To Around 2 Feet. Showers Likely With A Chance Of Thunderstorms.
Saturday Night...Southeast To South Winds 10 To 15 Knots. Seas Building To 2 To 3 Feet. A Chance Of Showers And Thunderstorms.
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Area Forecast Discussion
National Weather Service Key West FL
1048am EDT Tuesday May 26 2026

Issued at 1048am EDT Tuesday May 26 2026

Scattered showers this morning are gradually winding down. Most of the activity is concentrated in a corridor between Elbow Cay to T Tower. Relatively drier is moving in and will greatly reduce the coverage of showers for the rest of today. Meanwhile, high pressure centered near Bermuda continues to dominate our winds with breezy east to southeast conditions. As such, Small Craft Advisories remain active for most of the coastal waters with the exception of the Southeast Gulf waters.

As has been the case each day and night, we will see a minimum this afternoon in rain chances, then increase again overnight as nocturnal instability peaks. Meanwhile, breezes will be slow to ease but will eventually relinquish overnight into Wednesday. Other than a small change to the Small Craft Advisory, made no other changes to the going forecast.

Marine
Issued at 1048am EDT Tuesday May 26 2026

Small Craft Advisories remain in effect for all waters except the Southeast Gulf. Moderate to fresh east to southeast breezes will persist through the afternoon and gradually slacken through the next 24 hours. Breezes will noticeably slacken and veer to the southeast to south as the high slides eastward and weakens by the middle of the week. Shower and thunderstorm chances will increase for the middle and latter part of the work week.

Issued at 530am EDT Tuesday May 26 2026 Scattered showers have persisted across the coastal waters overnight into the early morning hours for the Florida Keys. While a majority of these showers have been light showers, a few have grown tall enough to shoot off a few lightning strikes before collapsing. Temperatures across the island chain are in the lower 80s with dewpoints in the mid 70s making for yet again another muggy morning. Across the Reef wind observations are southeasterly at near 20 knots. A Small Craft Advisory is in effect for all coastal waters. As the day progresses, the high that has been assisting with freshening breezes will shift easterly allowing the pressure gradient to weaken resulting in a slight slackening of winds occurring this afternoon into this evening.

Wednesday, the synoptic pattern will change as the ridges continue to shift easterly further into the Atlantic and makes way for troughing to enter the region. The resulting more southerly direction for winds will bring in tropical moisture creating more of a chance for showers. While heavy rain is possible in these showers, we are not mentioned in the Excessive Rainfall Outlook until Friday as a Marginal Risk, though we have been placed under general thunder for Days 1-3 in the Severe Weather Outlook. The shift in pattern and resulting showers and storms probabilities will continue to be closely monitored and adjusted as needed throughout the coming days.


NOAA Key West FL Office: Watches - Warnings - Advisories
FL...None. GM...Small Craft Advisory for GMZ031-032-035-042>044-052>055-072>075.