National Weather Service Marine Forecast FZUS52 KKEY
FZUS52 KKEY 160324
CWFKEY
Coastal Waters Forecast for the Florida Keys
National Weather Service Key West FL
1024 PM EST Mon Dec 15 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.
GMZ005-161530
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
1024 PM EST Mon Dec 15 2025
SYNOPSIS
In the wake of the recent cold front passage, fresh to
strong breezes will continue for the next couple of days. As an
area of high pressure in the wake of the front slides into the
central North Atlantic by Wednesday night, breezes will slacken
for the second half of the week. A second, weaker front will push
through the Florida Keys coastal waters by the end of the week,
with modestly freshened breezes expected for the weekend behind
the front.
The Approximate Shoreward Edge of the Gulf Stream as of December 15...
26 NM South of Dry Tortugas Light...on Loggerhead Key. 21 NM South of Cosgrove Shoal Light...off the Marquesas Keys. 15 NM South of Sand Key Light...off Key West. 18 NM South of Looe Key...off Big Pine Key. 16 NM Southeast of Sombrero Key Light...off Marathon. 13 NM Southeast of Alligator Reef Light...off Islamorada. 7 NM Southeast of Molasses Reef Light...off Key Largo. 3 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.
GMZ031-161530
Florida Bay including Barnes Sound, Blackwater Sound, and
Buttonwood Sound
1024 PM EST Mon Dec 15 2025
SMALL CRAFT ADVISORY IN EFFECT
OVERNIGHT
Northeast to east winds 20 to 25 knots. Bay waters
very rough. Scattered showers.
TUESDAY
Northeast to east winds near 20 knots. Bay waters
rough. Isolated showers.
TUESDAY NIGHT
Northeast to east winds near 20 knots, decreasing
to 15 to 20 knots. Bay waters rough, becoming choppy.
WEDNESDAY
East winds near 15 knots. Bay waters a moderate
chop.
WEDNESDAY NIGHT
East winds 10 to 15 knots. Bay waters a light
to moderate chop.
THURSDAY
East to southeast winds near 10 knots. Bay waters a
light chop. Isolated showers.
THURSDAY NIGHT
East to southeast winds near 10 knots, becoming
southeast to south 5 to 10 knots. Bay waters a light chop,
becoming smooth to a light chop. Isolated showers.
FRIDAY
Southwest to west 5 to 10 knots, becoming west to
northwest. Bay waters smooth to a light chop. Isolated showers.
FRIDAY NIGHT
Northwest to north winds near 10 knots, becoming
north to northeast. Bay waters a light chop. Isolated showers.
SATURDAY AND SATURDAY NIGHT
Northeast to east winds 10 to 15
knots. Bay waters a light to moderate chop. Isolated showers.
GMZ032-035-161530
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
1024 PM EST Mon Dec 15 2025
SMALL CRAFT ADVISORY IN EFFECT
OVERNIGHT
Northeast winds 20 to 25 knots. Seas 3 to 5 feet,
occasionally to 6 feet, except 5 to 6 feet, occasionally to 8 feet
west of the Marquesas Keys. Nearshore waters becoming very rough.
Isolated showers.
TUESDAY
Northeast to east winds near 20 knots. Seas 3 to
4 feet, occasionally to 5 feet, except 4 to 6 feet, occasionally
to 8 feet west of the Marquesas Keys. Nearshore waters rough.
Isolated showers.
TUESDAY NIGHT
Northeast to east winds near 20 knots, decreasing
to 15 to 20 knots. Seas 2 to 4 feet, occasionally to 5 feet,
except 4 to 5 feet, occasionally to 6 feet west of the Marquesas
Keys. Nearshore waters rough, becoming choppy. Isolated showers.
WEDNESDAY
East winds near 15 knots. Seas 2 to 3 feet, except 3
to 4 feet, occasionally to 5 feet west of Marquesas Keys.
Nearshore waters a moderate chop.
WEDNESDAY NIGHT
East winds decreasing to 10 to 15 knots. Seas
subsiding to 1 to 2 feet, except subsiding to 2 to 3 west of the
Marquesas Keys. Nearshore waters becoming a light to moderate
chop.
THURSDAY
East to southeast winds decreasing to near 10 knots.
Seas 1 to 2 feet, except 2 to 3 feet west of the Marquesas Keys.
Nearshore waters becoming a light chop. Isolated showers.
THURSDAY NIGHT
East to southeast winds near 10 knots, becoming
southeast to south 5 to 10 knots. Seas subsiding to around 1 foot,
except subsiding to 1 to 2 feet west of the Marquesas Keys.
Nearshore waters a light chop, becoming smooth to a light chop.
Isolated showers.
FRIDAY
Southwest to west winds 5 to 10 knots, becoming
northwest to north near 10 knots. Seas building to 1 to 2 feet,
except building to around 2 feet west of the Marquesas Keys.
Nearshore waters smooth to a light chop, becoming a light chop.
Isolated showers.
FRIDAY NIGHT
North to northeast winds increasing to 10 to 15
knots. Seas 1 to 2 feet, except building to 2 to 3 feet west of
the Marquesas Keys. Nearshore waters becoming a light to moderate
chop. Isolated showers.
SATURDAY
Northeast to east winds 10 to 15 knots. Seas 1 to
2 feet, except 2 to 3 feet west of the Marquesas Keys. Nearshore
waters a light to moderate chop. Isolated showers.
SATURDAY NIGHT
East winds 10 to 15 knots. Seas 1 to 2 feet,
except 2 to 3 feet west of the Marquesas Keys. Nearshore waters a
light to moderate chop. Isolated showers.
GMZ042>044-161530
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
1024 PM EST Mon Dec 15 2025
SMALL CRAFT ADVISORY IN EFFECT
OVERNIGHT
Northeast winds near 25 knots. Seas 4 to 5 feet,
occasionally to 6 feet, except 5 to 6 feet, occasionally to 8 feet
west of Cosgrove Shoal Light. Nearshore waters extremely rough.
Scattered showers.
TUESDAY
Northeast to east winds 20 to 25 knots. Seas 3 to 5
feet, occasionally to 6 feet, except 5 to 6 feet, occasionally to
8 feet west of Cosgrove Shoal Light. Nearshore waters very rough.
Isolated showers.
TUESDAY NIGHT
Northeast to east winds near 20 knots, decreasing
to 15 to 20 knots. Seas 3 to 4 feet, occasionally to 5 feet,
except 4 to 5 feet, occasionally to 6 feet west of Cosgrove Shoal
Light. Nearshore waters rough, becoming choppy. Isolated showers.
WEDNESDAY
East winds 15 to 20 knots, decreasing to near 15
knots. Seas subsiding to 2 to 4 feet, occasionally to 5 feet.
Nearshore waters choppy, becoming a moderate chop. Isolated
showers.
WEDNESDAY NIGHT
East winds 10 to 15 knots. Seas 2 to 4 feet,
occasionally to 5 feet. Nearshore waters a light to moderate
chop. Isolated showers.
THURSDAY
East to southeast winds decreasing to near 10 knots.
Seas 2 to 3 feet. Nearshore waters becoming a light chop.
Isolated showers.
THURSDAY NIGHT
East to southeast winds near 10 knots, becoming
southeast to south 5 to 10 knots. Seas 2 to 3 feet, subsiding to 1
to 2 feet, except subsiding to around 2 feet west of Cosgrove
Shoal Light. Nearshore waters a light chop, becoming smooth to a
light chop. Isolated showers.
FRIDAY
Southwest to west winds 5 to 10 knots, becoming
northwest to north near 10 knots. Seas around 1 foot, except 1 to
2 feet west of Cosgrove Shoal Light. Nearshore waters smooth to a
light chop, becoming a light chop. Isolated showers.
FRIDAY NIGHT
Northwest to north winds near 10 knots, becoming
north to northeast 10 to 15 knots. Seas 1 to 2 feet, building to 2
to 3 feet. Nearshore waters a light chop, becoming a light to
moderate chop. Isolated showers.
SATURDAY
Northeast to east winds 10 to 15 knots. Seas 2 to
3 feet. Nearshore waters a light to moderate chop. Isolated
showers.
SATURDAY NIGHT
East winds 10 to 15 knots. Seas 2 to 3 feet.
Nearshore waters a light to moderate chop. Isolated showers.
GMZ052>055-072>075-161530
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
1024 PM EST Mon Dec 15 2025
SMALL CRAFT ADVISORY IN EFFECT
OVERNIGHT
Northeast winds near 25 knots. Seas 7 to 9 feet,
occasionally to 11 feet. Wave Detail: Northeast to east 9 feet at
7 seconds and northwest to north 3 feet at 8 seconds. Numerous
showers.
TUESDAY
Northeast to east winds 20 to 25 knots. Seas 6 to
9 feet, occasionally to 11 feet. Wave Detail: Northeast to east
8 feet at 8 seconds and northwest 2 feet at 7 seconds. Scattered
showers.
TUESDAY NIGHT
Northeast to east winds 20 to 25 knots,
decreasing to near 20 knots late. Seas 6 to 8 feet, occasionally
to 10 feet. Wave Detail: Northeast to east 8 feet at 7 seconds.
Isolated showers.
WEDNESDAY
East winds near 20 knots early, decreasing to 15 to
20 knots. Seas 5 to 7 feet, occasionally to 9 feet, subsiding to
4 to 6 feet, occasionally to 8 feet. Isolated showers.
WEDNESDAY NIGHT
East winds near 15 knots. Seas 4 to 6 feet,
occasionally to 8 feet. Isolated showers.
THURSDAY
East to southeast winds 10 to 15 knots. Seas 3 to
5 feet, occasionally to 6 feet. Isolated showers.
THURSDAY NIGHT
East to southeast winds 10 to 15 knots,
becoming southeast to south near 10 knots. Seas 2 to 4 feet,
occasionally to 5 feet, subsiding to 2 to 3 feet. Isolated
showers.
FRIDAY
Southwest to west winds near 10 knots, becoming
northwest to north. Seas around 2 feet. Isolated showers.
FRIDAY NIGHT
North to northeast winds 10 to 15 knots. Seas
2 to 3 feet. Isolated showers.
SATURDAY
Northeast to east winds 10 to 15 knots, increasing to
near 15 knots. Seas 2 to 4 feet, occasionally to 5 feet. Isolated
showers.
SATURDAY NIGHT
East winds near 15 knots. Seas 3 to 4 feet,
occasionally to 5 feet. Isolated showers.
GMZ033-034-161530
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
1024 PM EST Mon Dec 15 2025
SMALL CRAFT ADVISORY IN EFFECT
OVERNIGHT
Northeast winds 20 to 25 knots. Seas 4 to 6 feet,
occasionally to 8 feet. Wave Detail: North 6 feet at 7 seconds.
Isolated showers.
TUESDAY
Northeast winds 20 to 25 knots, briefly decreasing to 15
to 20 knots. Seas 4 to 6 feet, occasionally to 8 feet. Wave
Detail: Northeast 6 feet at 6 seconds.
TUESDAY NIGHT
Northeast to east winds near 20 knots, decreasing
to 15 to 20 knots. Seas 3 to 5 feet, occasionally to 6 feet. Wave
Detail: Northeast to east 4 feet at 5 seconds. Isolated showers.
WEDNESDAY
Northeast to east winds near 15 knots, becoming east
10 to 15 knots. Seas 2 to 4 feet, occasionally to 5 feet. Isolated
showers.
WEDNESDAY NIGHT
East winds 10 to 15 knots. Seas 2 to 4 feet,
occasionally to 5 feet. Isolated showers.
THURSDAY
East to southeast winds 10 to 15 knots, decreasing to
near 10 knots. Seas subsiding to 2 to 3 feet. Isolated showers.
THURSDAY NIGHT
East to southeast winds near 10 knots, becoming
south to southwest 5 to 10 knots. Seas subsiding to 1 to 2 feet.
Isolated showers.
FRIDAY
West to northwest winds 5 to 10 knots, becoming
northwest to north near 10 knots. Seas 1 to 2 feet. Isolated
showers.
FRIDAY NIGHT
North to northeast winds 10 to 15 knots. Seas
1 to 2 feet, building to 2 to 3 feet. Isolated showers.
SATURDAY
Northeast to east winds 10 to 15 knots. Seas 2 to
3 feet. Isolated showers.
SATURDAY NIGHT
East winds 10 to 15 knots. Seas 2 to 3 feet.
Isolated showers.
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