National Weather Service Marine Forecast FZUS52 KKEY
FZUS52 KKEY 290831
CWFKEY
Coastal Waters Forecast for the Florida Keys
National Weather Service Key West FL
431 AM EDT Mon Jun 29 2026
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.
GMZ005-292045
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
431 AM EDT Mon Jun 29 2026
SYNOPSIS
A broad high pressure system centered over the North
Atlantic will continue to extend westward to the Florida Peninsula
through today. This will support bouts of light to gentle breezes
that may freshen to gentle to moderate at times. Starting late
tonight, a frontal boundary will press south across the Florida
Peninsula and stall across central Florida. This will act to
weaken the high and allow for slackening breezes through Thursday.
Thereafter, breezes will resume a cycle of overnight peaks and
daytime lulls.
The Approximate Shoreward Edge of the Gulf Stream as of June 28, 2026...
33 NM South of Dry Tortugas Light...on Loggerhead Key. 8 NM South of Cosgrove Shoal Light...off the Marquesas Keys. 7 NM South of Sand Key Light...off Key West. 11 NM South of Looe Key...off Big Pine Key. 12 NM Southeast of Sombrero Key Light...off Marathon. 7 NM Southeast of Alligator Reef Light...off Islamorada. 2 NM Southeast of Molasses Reef Light...off Key Largo. 1 NM Southeast 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.
GMZ031-292045
Florida Bay including Barnes Sound, Blackwater Sound, and
Buttonwood Sound
431 AM EDT Mon Jun 29 2026
TODAY
East to southeast winds near 10 knots. Bay waters a
light chop. A slight chance of showers and thunderstorms.
TONIGHT
East to southeast winds near 10 knots, decreasing
to 5 to 10 knots. Bay waters a light chop, becoming smooth to a
light chop. A slight chance of showers and thunderstorms.
TUESDAY
Southeast winds 5 to 10 knots. Bay waters smooth to a
light chop. A chance of showers with a slight chance of
thunderstorms.
TUESDAY NIGHT
Southeast winds 5 to 10 knots. Bay waters smooth
to a light chop. A slight chance of showers and thunderstorms.
WEDNESDAY
East to southeast winds near 5 knots. Bay waters
smooth. A slight chance of showers and thunderstorms.
WEDNESDAY NIGHT
East to southeast winds 5 to 10 knots. Bay
waters smooth to a light chop. A slight chance of showers and
thunderstorms.
THURSDAY
East to southeast winds 5 to 10 knots. Bay waters
smooth to a light chop. A chance of showers and thunderstorms.
THURSDAY NIGHT
East to southeast winds near 10 knots. Bay
waters a light chop. A chance of showers and thunderstorms.
FRIDAY
East to southeast winds 5 to 10 knots. Bay waters
smooth to a light chop. A chance of showers and thunderstorms.
FRIDAY NIGHT
East to southeast winds 5 to 10 knots. Bay waters
smooth to a light chop. A chance of showers and thunderstorms.
GMZ032-035-292045
Bayside and Gulfside from Craig Key to west end of Seven Mile
Bridge
Gulf of America from west end of Seven Mile Bridge to Halfmoon
Shoal out to 5 Fathoms
431 AM EDT Mon Jun 29 2026
TODAY
East to southeast winds near 10 knots. Seas 1 to 2 feet.
Nearshore waters a light chop. A slight chance of showers and
thunderstorms.
TONIGHT
East to southeast winds near 10 knots, decreasing
to 5 to 10 knots. Seas around 1 foot. Nearshore waters a light
chop, becoming smooth to a light chop. A slight chance of showers
and thunderstorms.
TUESDAY
East to southeast winds 5 to 10 knots, becoming
northwest to north in the afternoon. Seas subsiding to 1 foot or
less. Nearshore waters smooth to a light chop. A chance of showers
with a slight chance of thunderstorms.
TUESDAY NIGHT
North to northeast winds 5 to 10 knots, becoming
east to southeast. Seas 1 foot or less. Nearshore waters smooth
to a light chop. A chance of showers with a slight chance of
thunderstorms.
WEDNESDAY
East to southeast winds near 5 knots. Seas 1 foot or
less. Nearshore waters smooth. A slight chance of showers and
thunderstorms.
WEDNESDAY NIGHT
East to southeast winds 5 to 10 knots. Seas 1
foot or less. Nearshore waters smooth to a light chop. A chance
of showers and thunderstorms.
THURSDAY
East to southeast winds 5 to 10 knots. Seas 1 foot or
less. Nearshore waters smooth. A slight chance of showers and
thunderstorms.
THURSDAY NIGHT
East to southeast winds near 10 knots. Seas
around 1 foot. Nearshore waters a light chop. A chance of showers
and thunderstorms.
FRIDAY
East to southeast winds 5 to 10 knots. Seas around 1
foot. Nearshore waters smooth to a light chop. A chance of
showers and thunderstorms.
FRIDAY NIGHT
East to southeast winds 5 to 10 knots. Seas
around 1 foot. Nearshore waters smooth to a light chop. A chance
of showers and thunderstorms.
GMZ042>044-292045
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
431 AM EDT Mon Jun 29 2026
TODAY
East to southeast winds 10 to 15 knots. Seas 2 to 3
feet. Nearshore waters a light to moderate chop. A slight chance
of showers and thunderstorms.
TONIGHT
East to southeast winds 10 to 15 knots, decreasing
to near 10 knots. Seas around 2 feet. Nearshore waters a light to
moderate chop, becoming a light chop. A slight chance of showers
and thunderstorms.
TUESDAY
East to southeast winds 5 to 10 knots. Seas 1 to 2
feet, subsiding to around 1 foot. Nearshore waters smooth to a
light chop. A slight chance of showers and thunderstorms.
TUESDAY NIGHT
East to southeast winds 5 to 10 knots. Seas
around 1 foot. Nearshore waters smooth to a light chop. A slight
chance of showers and thunderstorms.
WEDNESDAY
East winds near 5 knots. Seas around 1 foot.
Nearshore waters smooth. A slight chance of showers and
thunderstorms.
WEDNESDAY NIGHT
East to southeast winds 5 to 10 knots. Seas
around 1 foot. Nearshore waters smooth to a light chop. A slight
chance of showers and thunderstorms.
THURSDAY
East to southeast winds 5 to 10 knots. Seas around
1 foot. Nearshore waters smooth to a light chop. A slight chance
of showers and thunderstorms.
THURSDAY NIGHT
East to southeast winds near 10 knots. Seas 1
to 2 feet. Nearshore waters a light chop. A chance of showers and
thunderstorms.
FRIDAY
East to southeast winds 5 to 10 knots. Seas around 1
foot. Nearshore waters smooth to a light chop. A slight chance of
showers and thunderstorms.
FRIDAY NIGHT
East to southeast winds near 10 knots. Seas 1 to
2 feet. Nearshore waters a light chop. A chance of showers and
thunderstorms.
GMZ052>055-072>075-292045
Straits of Florida from Ocean Reef to Craig Key out 20 NM
Straits of Florida from Craig Key to west end of Seven Mile
Bridge out 20 NM
Straits of Florida from west end of Seven Mile Bridge to south of
Halfmoon Shoal out 20 NM
Straits of Florida from Halfmoon Shoal to 20 NM west of Dry
Tortugas out 20 NM
Straits of Florida from Ocean Reef to Craig Key 20 to 60 NM out
Straits of Florida from Craig Key to west end of Seven Mile
Bridge 20 to 60 NM out
Straits of Florida from west end of Seven Mile Bridge to south of
Halfmoon Shoal 20 to 60 NM out
Straits of Florida from Halfmoon Shoal to 20 NM west of Dry
Tortugas 20 to 60 NM out
431 AM EDT Mon Jun 29 2026
TODAY
East winds 10 to 15 knots. Seas 2 to 4 feet, occasionally
5 feet. Wave Detail: East 3 feet at 5 seconds. A slight chance of
showers and thunderstorms.
TONIGHT
East winds 10 to 15 knots, decreasing to near 10
knots. Seas 2 to 3 feet. Wave Detail: East 3 feet at 5 seconds. A
slight chance of showers and thunderstorms.
TUESDAY
East winds near 10 knots, decreasing to 5 to 10 knots.
Seas 1 to 2 feet. Wave Detail: East 2 feet at 5 seconds. A slight
chance of showers and thunderstorms.
TUESDAY NIGHT
East winds near 10 knots. Seas 1 to 2 feet. A
slight chance of showers and thunderstorms.
WEDNESDAY
East winds 5 to 10 knots. Seas 1 to 2 feet. A slight
chance of showers and thunderstorms.
WEDNESDAY NIGHT
East winds 5 to 10 knots. Seas 1 to 2 feet. A
slight chance of showers and thunderstorms.
THURSDAY
East to southeast winds 5 to 10 knots. Seas 1 to
2 feet.
THURSDAY NIGHT
East to southeast winds near 10 knots. Seas
around 2 feet. A slight chance of showers and thunderstorms.
FRIDAY
East to southeast winds 5 to 10 knots. Seas 1 to
2 feet. A slight chance of showers and thunderstorms.
FRIDAY NIGHT
East to southeast winds near 10 knots. Seas around
2 feet. A slight chance of showers and thunderstorms.
GMZ033-034-292045
Gulf of America from East Cape Sable to Chokoloskee 20 to 60 NM
out and beyond 5 fathoms
Gulf of America including Dry Tortugas and Rebecca Shoal Channel
431 AM EDT Mon Jun 29 2026
TODAY
East to southeast winds 10 to 15 knots, becoming
northeast to east and decreasing to 5 to 10 knots. Seas 2 to 3
feet, subsiding to 1 to 2 feet. Wave Detail: East 2 feet at 4
seconds. A slight chance of showers and thunderstorms.
TONIGHT
Northeast to east increasing to near 10 knots.
Seas 1 to 2 feet. Wave Detail: East 1 foot at 3 seconds. A slight
chance of showers and thunderstorms.
TUESDAY
East to southeast winds 5 to 10 knots, becoming north
in the afternoon. Seas 1 to 2 feet, subsiding to around 1 foot. Wave
Detail: East to southeast 1 foot at 3 seconds. A slight chance of
showers and thunderstorms.
TUESDAY NIGHT
North winds 5 to 10 knots, becoming northeast
to east. Seas around 1 foot. A chance of showers with a slight
chance of thunderstorms.
WEDNESDAY
Variable winds near 5 knots. Seas around 1 foot. A
slight chance of showers and thunderstorms.
WEDNESDAY NIGHT
Variable winds near 5 knots, becoming east to
southeast. Seas around 1 foot. A chance of showers and
thunderstorms.
THURSDAY
East to southeast winds near 5 knots. Seas 1 foot or
less. A slight chance of showers and thunderstorms.
THURSDAY NIGHT
East to southeast winds 5 to 10 knots. Seas
around 1 foot. A chance of showers and thunderstorms.
FRIDAY
East to southeast winds near 5 knots. Seas around
1 foot. A slight chance of showers and thunderstorms.
FRIDAY NIGHT
East to southeast winds 5 to 10 knots. Seas
around 1 foot. A chance of showers and thunderstorms.
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