GMZ005-010230-
 Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
 1019 AM EDT Sat Oct 31 2026
 
 
 .SYNOPSIS...
 A broad area of high pressure over the eastern United States will
 sustain moderate to fresh breezes across the Florida Keys waters
 this weekend. Small Craft Should Exercise Caution headlines may be
 required for portions or all marine zones tonight. Breezes are on
 track to slacken tomorrow, but elevated winds along the Florida
 Peninsula will generate higher northerly swell for the waters
 south of the Upper Keys. After the initial higher winds tonight,
 breezes will slacken during the weekend. Light to gentle breezes
 are possible midweek. Shower chances are expected to peak tomorrow
 through Monday with drier conditions during the middle of the
 week.
 
 The Approximate Shoreward Edge of the Gulf Stream as of October
 27, 2026...
 
 19 NM south of Dry Tortugas Light, on Loggerhead Key
 34 NM south of Cosgrove Shoal Light, off the Marquesas Keys
 28 NM south of Sand Key Light, off Key West
 38 NM south of Looe Key, off Big Pine Key
 31 NM southeast of Sombrero Key Light, off Marathon
 17 NM south-southeast of Alligator Reef Light, off Islamorada
 10 NM southeast of Molasses Reef Light, off Key Largo
 10 NM northwest of Carysfort Reef Light, off Ocean Reef
 
 Gulf Stream Information Courtesy of the National Weather Service in
 Key West, using data from RTOFS and NASA SPoRT SST.
 
 $$




 
 GMZ042>044-010230-
 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-
 1019 AM EDT Sat Oct 31 2026
 

 THIS AFTERNOON
 Northeast to east winds near 15 knots. Seas 1
 to 2 feet, building to 2 to 3 feet. Nearshore waters a moderate
 chop. A chance of showers with a slight chance of thunderstorms.

 TONIGHT
 East winds increasing to 15 to 20 knots. Seas building
 to 2 to 4 feet, occasionally to 5 feet. Nearshore waters becoming
 choppy. Showers likely with a slight chance of thunderstorms.

 SUNDAY
 East winds near 15 knots, decreasing to 10 to 15 knots.
 Seas subsiding to 2 to 3 feet. Nearshore waters a moderate chop,
 becoming a light to moderate chop. Showers likely with a chance
 of thunderstorms.

 SUNDAY NIGHT
 East winds 10 to 15 knots. Seas 2 to 3 feet.
 Nearshore waters a light to moderate chop. Showers likely with a
 chance of thunderstorms.

 MONDAY
 East winds 10 to 15 knots. Seas 2 to 3 feet. Nearshore
 waters a light to moderate chop. A chance of showers and
 thunderstorms.

 MONDAY NIGHT
 Northeast to east winds near 10 knots. Seas 1 to
 2 feet. Nearshore waters a light chop. A slight chance of showers
 and thunderstorms.

 TUESDAY
 Northeast to east winds near 10 knots, decreasing to 5
 to 10 knots. Seas 1 to 2 feet. Nearshore waters a light chop,
 becoming smooth to a light chop. A slight chance of showers.

 TUESDAY NIGHT THROUGH WEDNESDAY NIGHT
 East winds 5 to 10
 knots. Seas 1 to 2 feet. Nearshore waters smooth to a light chop.
 A slight chance of showers and thunderstorms.
 
 $$