GMZ005-132145-
 Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
 431 AM EST Sat Dec 13 2025
 
 
 .SYNOPSIS...Moderate to occasionally fresh northeast to easterly
 breezes will slightly slacken over the day into tonight. The next
 frontal boundary is progged to push through the Florida Keys
 marine zones on Sunday night. Ahead of the front, elevated chances
 for showers and thunderstorms will be possible late tonight
 through early Sunday. In the wake of the frontal passage, fresh to
 strong northeasterly breezes are expected Sunday night through at
 least Tuesday.
 
 The Approximate Shoreward Edge of the Gulf Stream as of December 8...
 
 15 NM South of Dry Tortugas Light...on Loggerhead Key.
 13 NM South of Cosgrove Shoal Light...off the Marquesas Keys.
 14 NM South of Sand Key Light...off Key West.
 18 NM South of Looe Key...off Big Pine Key.
 23 NM Southeast of Sombrero Key Light...off Marathon.
 18 NM Southeast of Alligator Reef Light...off Islamorada.
 12 NM Southeast of Molasses Reef Light...off Key Largo.
 8 NM Southeast of Carysfort Reef Light...off Ocean Reef.
 
 Gulf Stream Information Courtesy of the National Weather Service in
 Key West based on products from NASA SPoRT and RTOFS.
 
 $$




 
 GMZ031-132145-
 Florida Bay including Barnes Sound, Blackwater Sound, and
 Buttonwood Sound-
 431 AM EST Sat Dec 13 2025
 

 TODAY
 Northeast to east winds 10 to 15 knots. Bay waters a
 light to moderate chop. Scattered showers and isolated
 thunderstorms in the afternoon.

 TONIGHT
 East winds 10 to 15 knots, decreasing to 5 to 10 knots.
 Bay waters a light to moderate chop, becoming smooth to a light
 chop. Widespread showers and scattered thunderstorms.

 SUNDAY
 Northwest to north winds 5 to 10 knots, becoming north
 and increasing to near 10 knots. Bay waters smooth to a light
 chop, becoming a light chop. Scattered showers and isolated
 thunderstorms.

 SUNDAY NIGHT
 North winds 10 to 15 knots, increasing to 15 to 20
 knots. Bay waters a light to moderate chop, becoming choppy.
 Isolated showers.

 MONDAY
 Northeast winds near 20 knots. Bay waters rough.
 Isolated showers.

 MONDAY NIGHT
 Northeast winds near 20 knots. Bay waters rough.
 Isolated showers.

 TUESDAY
 Northeast winds 15 to 20 knots. Bay waters choppy.
 Isolated showers.

 TUESDAY NIGHT
 Northeast to east winds near 15 knots. Bay
 waters a moderate chop. Isolated showers.

 WEDNESDAY
 East winds near 15 knots. Bay waters a moderate
 chop. Isolated showers.

 WEDNESDAY NIGHT
 East winds 10 to 15 knots. Bay waters a light
 to moderate chop. Isolated showers.
 
 $$