GMZ005-120930-
 Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
 417 PM EST Thu Dec 11 2025
 
 
 .SYNOPSIS...As high pressure drifts eastward over the next
 several days and eventually into the western North Atlantic,
 north to northeast winds will clock around to the northeast to
 east. 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 Saturday 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.
 
 $$




 
 GMZ042>044-120930-
 Hawk Channel from Ocean Reef to Craig Key out to the reef-
 Hawk Channel from Craig Key to west end of Seven Mile Bridge out
 to the reef-
 Hawk Channel from west end of Seven Mile Bridge to Halfmoon Shoal
 out to the reef-
 417 PM EST Thu Dec 11 2025
 

 TONIGHT
 North to northeast winds near 10 knots, becoming
 northeast to east. Seas 1 to 2 feet. Nearshore waters a light
 chop.

 FRIDAY
 Northeast to east winds near 10 knots. Seas 1 to 2
 feet. Nearshore waters a light chop.

 FRIDAY NIGHT
 Northeast to east winds near 10 knots. Seas 1 to
 2 feet. Nearshore waters a light chop.

 SATURDAY
 Northeast to east winds 10 to 15 knots. Seas 1 to
 2 feet, building to around 2 feet. Nearshore waters a light to
 moderate chop. Isolated showers.

 SATURDAY NIGHT
 East winds 10 to 15 knots, becoming northeast
 and decreasing to 5 to 10 knots. Seas around 2 feet, subsiding to
 1 to 2 feet. Nearshore waters a light to moderate chop, becoming
 smooth to a light chop. Scattered showers.

 SUNDAY
 North to northeast winds 5 to 10 knots, increasing to 10
 to 15 knots. Seas around 1 foot, building to 1 to 2 feet. West of
 Cosgrove Shoal Light, seas 1 to 2 feet, building to 2 to 3 feet.
 Nearshore waters smooth a light chop, becoming a light to
 moderate chop. Scattered showers.

 SUNDAY NIGHT
 North to northeast winds 10 to 15 knots,
 increasing to near 20 knots. Seas 1 to 2 feet, building to 2 to 3
 feet. West of Cosgrove Shoal Light, seas 2 to 3 feet, building to
 3 to 4 feet, occasionally to 5 feet. Nearshore waters a light to
 moderate chop, becoming rough. Isolated showers.

 MONDAY AND MONDAY NIGHT
 Northeast winds near 20 knots. Seas 2
 to 4 feet, occasionally to 5 feet, except 4 to 5 feet,
 occasionally to 6 feet west of Cosgrove Shoal Light. Nearshore
 waters rough. Isolated showers.

 TUESDAY AND TUESDAY NIGHT
 Northeast winds 15 to 20 knots. Seas
 2 to 3 feet, except 3 to 4 feet, occasionally to 5 feet west of
 Cosgrove Shoal Light. Nearshore waters choppy. Isolated showers.
 
 $$