Marine Forecast GMZ005

Expires:202507141430;;402055
FZUS52 KKEY 140227
CWFKEY

Coastal Waters Forecast for the Florida Keys
National Weather Service Key West FL
1027 PM EDT Sun Jul 13 2025

Florida Bay, Hawk Channel and Straits of Florida from Ocean Reef
to south of Dry Tortugas, and the extreme southeastern Gulf of
America, including The Florida Keys National Marine Sanctuary

Seas are given as significant wave height, which is the average
height of the highest 1/3 of the waves. Individual waves may be
more than twice the significant wave height.

Wave Detail will include details about the period and direction
of origin for the highest energy waves. Long-period swells coming
from a different direction than the wind would be included in the
Wave Detail.


GMZ005-141430
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
1027 PM EDT Sun Jul 13 2025

SYNOPSIS

Shower coverage is forecast to gradually increase
overnight as additional moisture is directed across the CWA. Weak
low pressure tries to develop in the vicinity of Florida heading
through the first half of the week. Initially, the Keys will be on
the southern fringe in a col region resulting in mainly variable
breezes through Monday night. As the weak low pressure area shifts
to the west and high pressure builds in behind, breezes will
freshen becoming southeast to south at first, before becoming east
to southeast for mid to late week. Also, expect increasing
coverage of showers and thunderstorms for the early to middle part
of the week.

The Approximate Shoreward Edge of the Gulf Stream as of July 8

14 NM South of Dry Tortugas Lighton Loggerhead Key.
5 NM South of Cosgrove Shoal Lightoff the Marquesas Keys.
4 NM South of Sand Key Lightoff Key West.
4 NM South of Looe Keyoff Big Pine Key.
5 NM Southeast of Sombrero Key Lightoff Marathon.
6 NM Southeast of Alligator Reef Lightoff Islamorada.
3 NM Southeast of Molasses Reef Lightoff Key Largo.
4 NM Southeast of Carysfort Reef Lightoff Ocean Reef.

Gulf Stream Information Courtesy of the National Weather Service in
Key West based on products from NASA SPoRT.




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