National Weather Service Marine Forecast FZUS52 KKEY
FZUS52 KKEY 010933
CWFKEY
Coastal Waters Forecast for the Florida Keys
National Weather Service Key West FL
433 AM EST Sun Nov 1 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.
The Wave Detail section highlights the period and direction of origin for the highest-energy waves, as well as any long-period swells moving in a different direction than the wind.
GMZ005-012145
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
433 AM EST Sun Nov 1 2026
SYNOPSIS
A broad area of high pressure over the eastern United States will sustain gentle to moderate, occasionally fresh, breezes across the FLorida Keys waters this weekend. Small Craft Should Exercise Caution headlines are in effect for eastern portions of Hawk Channel and the Florida Straits. Breezes are on track to slacken tomorrow, but stronger winds along the east coast will generate a higher northerly swell for the waters south of the Upper Keys. Expect breezes to slacken during the weekend with light to gentle breezes possible midweek. Shower chances will be elevated through Monday with the peak expected on Sunday. Drier conditions will be able to set up 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.
GMZ031-012145
Florida Bay including Barnes Sound, Blackwater Sound, and
Buttonwood Sound
433 AM EST Sun Nov 1 2026
TODAY
East winds 10 to 15 knots. Bay waters a light to
moderate chop. Showers likely with a chance of thunderstorms.
TONIGHT
East winds 10 to 15 knots, increasing to near 15 knots.
Bay waters a light to moderate chop, becoming a moderate chop.
Showers likely with a chance of thunderstorms.
MONDAY
East winds near 15 knots, decreasing to 10 to 15 knots.
Bay waters a moderate chop, becoming a light to moderate chop.
Showers likely with a chance of thunderstorms.
MONDAY NIGHT
Northeast to east winds 10 to 15 knots. Bay
waters a light to moderate chop. A chance of showers with a
slight chance of thunderstorms.
TUESDAY
Northeast to east winds near 10 knots. Bay waters a
light chop. A slight chance of showers and thunderstorms.
TUESDAY NIGHT
Northeast winds near 10 knots, decreasing to 5 to
10 knots. Bay waters a light chop, becoming smooth to a light
chop.
WEDNESDAY
Northeast winds 5 to 10 knots, becoming light and
variable. Bay waters smooth to a light chop, becoming smooth. A
slight chance of showers.
WEDNESDAY NIGHT
Light and variable winds, becoming northwest.
Bay waters smooth.
THURSDAY
West to northwest winds increasing to 5 to 10 knots.
Bay waters becoming smooth to a light chop. A slight chance of
showers.
THURSDAY NIGHT
Northwest winds 5 to 10 knots. Bay waters
smooth to a light chop.
GMZ032-035-012145
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
433 AM EST Sun Nov 1 2026
TODAY
East winds 10 to 15 knots. Seas 1 to 2 feet. Nearshore
waters a light to moderate chop. Showers likely with a chance of
thunderstorms.
TONIGHT
East winds 10 to 15 knots. Seas 1 to 2 feet. Nearshore
waters a light to moderate chop. Showers likely with a chance of
thunderstorms.
MONDAY
East winds 10 to 15 knots. Seas 1 to 2 feet. Nearshore
waters a light to moderate chop. A chance of showers and
thunderstorms.
MONDAY NIGHT
Northeast to east winds 10 to 15 knots. Seas 1 to
2 feet. Nearshore waters a light to moderate chop. A slight
chance of showers and thunderstorms.
TUESDAY
Northeast to east winds decreasing to near 10 knots.
Seas subsiding to around 1 foot. Nearshore waters becoming a
light chop. A slight chance of showers and thunderstorms.
TUESDAY NIGHT
Northeast to east winds 5 to 10 knots. Seas
around 1 foot. Nearshore waters smooth to a light chop. A slight
chance of showers.
WEDNESDAY
Northeast winds 5 to 10 knots, becoming variable.
Seas around 1 foot. Nearshore waters smooth to a light chop. A
slight chance of showers.
WEDNESDAY NIGHT
Variable winds near 5 knots, becoming northwest
and increasing to 5 to 10 knots. Seas 1 foot or less. Nearshore
waters smooth.
THURSDAY
Northwest winds 5 to 10 knots. Seas 1 foot or less.
Nearshore waters smooth to a light chop.
THURSDAY NIGHT
Northwest winds 5 to 10 knots. Seas 1 foot or
less. Nearshore waters smooth to a light chop.
GMZ043-044-012145
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
433 AM EST Sun Nov 1 2026
TODAY
East winds 10 to 15 knots. Seas around 2 feet. Nearshore
waters a light to moderate chop. Showers likely with a chance of
thunderstorms.
TONIGHT
East winds 10 to 15 knots. Seas 1 to 2 feet. Nearshore
waters a light to moderate chop. Showers likely with a chance of
thunderstorms.
MONDAY
East winds increasing to near 15 knots. Seas building
to around 2 feet. Nearshore waters becoming a light to moderate
chop. A chance of showers and thunderstorms.
MONDAY NIGHT
Northeast to east winds near 15 knots, decreasing
to 10 to 15 knots. Seas around 2 feet, subsiding to 1 to 2 feet.
Nearshore waters a moderate chop, becoming a light to moderate chop.
A chance of showers with a slight chance of thunderstorms.
TUESDAY
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 NIGHT
Northeast to 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.
WEDNESDAY
Northeast to east winds 5 to 10 knots, becoming north.
Seas around 1 foot. Nearshore waters smooth to a light chop. A
slight chance of showers.
WEDNESDAY NIGHT
Northwest to north winds near 5 knots, becoming
northwest. Seas around 1 foot. Nearshore waters smooth.
THURSDAY
Northwest winds 5 to 10 knots. Seas around 1 foot.
Nearshore waters smooth to a light chop.
THURSDAY NIGHT
Northwest winds 5 to 10 knots. Seas around 1
foot. Nearshore waters smooth to a light chop.
GMZ042-012145
Hawk Channel from Ocean Reef to Craig Key out to the reef
433 AM EST Sun Nov 1 2026
SMALL CRAFT SHOULD EXERCISE CAUTION FOR INCREASING WINDS
TODAY
East winds near 15 knots early, increasing to 15 to 20
knots late. Seas 2 to 4 feet, occasionally to 5 feet. Nearshore
waters a moderate chop. Showers likely with a chance of
thunderstorms.
TONIGHT
East winds 15 to 20 knots. Seas 3 to 4 feet,
occasionally to 5 feet. Nearshore waters choppy. Showers with a
chance of thunderstorms.
MONDAY
East winds 15 to 20 knots early, decreasing to near 15
knots. Seas 2 to 4 feet, occasionally to 5 feet, subsiding to 2 to
3 feet. Nearshore waters choppy, becoming a moderate chop.
Showers likely with a chance of thunderstorms.
MONDAY NIGHT
Northeast to east winds decreasing to 10 to 15
knots. Seas 2 to 3 feet, subsiding to around 2 feet. Nearshore
waters becoming a light to moderate chop. A chance of showers
with a slight chance of thunderstorms.
TUESDAY
Northeast to east winds near 10 knots. Seas around
2 feet. Nearshore waters a light chop. A slight chance of showers
and thunderstorms.
TUESDAY NIGHT
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.
WEDNESDAY
Northeast winds 5 to 10 knots, becoming variable and
decreasing to near 5 knots. Seas around 1 foot. Nearshore waters
smooth to a light chop. A slight chance of showers.
WEDNESDAY NIGHT
Variable winds near 5 knots, becoming
northwest. Seas around 1 foot. Nearshore waters smooth.
THURSDAY
West to northwest winds near 5 knots. Seas 1 foot or
less. Nearshore waters smooth. A slight chance of showers.
THURSDAY NIGHT
West to northwest winds 5 to 10 knots. Seas
1 foot or less. Nearshore waters smooth to a light chop.
GMZ052-072-012145
Straits of Florida from Ocean Reef to Craig Key out 20 NM
Straits of Florida from Ocean Reef to Craig Key 20 to 60 NM out
433 AM EST Sun Nov 1 2026
SMALL CRAFT SHOULD EXERCISE CAUTION
TODAY
East winds 15 to 20 knots. Seas 4 to 5 feet,
occasionally to 6 feet. Wave Detail: Northeast to east 4 feet at 6
seconds. Showers likely with a chance of thunderstorms.
TONIGHT
East winds 15 to 20 knots, decreasing to near 15 knots
late. Seas 4 to 5 feet, occasionally to 6 feet. Wave Detail:
Northeast to east 5 feet at 6 seconds. Showers likely with a
chance of thunderstorms.
MONDAY
East winds near 15 knots. Seas 3 to 4 feet,
occasionally to 5 feet. Wave Detail: Northeast to east 4 feet at 6
seconds. Showers likely with a chance of thunderstorms.
MONDAY NIGHT
East winds near 15 knots, becoming northeast to
east and decreasing to 10 to 15 knots. Seas 3 to 4 feet,
occasionally to 5 feet, subsiding to 2 to 3 feet. A chance of
showers with a slight chance of thunderstorms.
TUESDAY
Northeast to east winds near 10 knots. Seas 2 to
3 feet. A chance of showers with a slight chance of
thunderstorms.
TUESDAY NIGHT
Northeast to east winds near 10 knots, decreasing
to 5 to 10 knots. Seas 2 to 3 feet, subsiding to 1 to 2 feet. A
slight chance of showers and thunderstorms.
WEDNESDAY
Northeast to east winds 5 to 10 knots, becoming
northwest to north. Seas 1 to 2 feet. A slight chance of showers.
WEDNESDAY NIGHT
Northwest winds near 5 knots. Seas 1 to
2 feet.
THURSDAY
West to northwest winds near 5 knots. Seas 1 to
2 feet.
THURSDAY NIGHT
West to northwest winds 5 to 10 knots. Seas
1 to 2 feet.
GMZ053>055-073>075-012145
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 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
433 AM EST Sun Nov 1 2026
TODAY
East winds 10 to 15 knots. Seas 2 to 3 feet. Wave
Detail: East 3 feet at 5 seconds. Showers likely with a chance of
thunderstorms.
TONIGHT
East winds 10 to 15 knots, increasing to near 15 knots.
Seas building to 2 to 4 feet, occasionally to 5 feet. Wave
Detail: East 3 feet at 6 seconds. Showers likely with a chance of
thunderstorms.
MONDAY
East winds 10 to 15 knots. Seas 2 to 4 feet,
occasionally to 5 feet. Wave Detail: Northeast to east 3 feet at
6 seconds and east to southeast 1 foot at 3 seconds. A chance of
showers and thunderstorms.
MONDAY NIGHT
Northeast to east winds 10 to 15 knots, decreasing
to near 10 knots. Seas subsiding to 2 to 3 feet. A chance of
showers with a slight chance of thunderstorms.
TUESDAY
Northeast to east winds near 10 knots. Seas 2 to
3 feet. A slight chance of showers and thunderstorms.
TUESDAY NIGHT
East winds 5 to 10 knots. Seas around 2 feet. A
slight chance of showers and thunderstorms.
WEDNESDAY
Northeast to east winds 5 to 10 knots, becoming
northwest to north. Seas 1 to 2 feet. A slight chance of showers
and thunderstorms.
WEDNESDAY NIGHT
Northwest to north winds near 5 knots. Seas
around 1 foot.
THURSDAY
Northwest winds 5 to 10 knots. Seas around 1 foot.
THURSDAY NIGHT
Northwest winds 5 to 10 knots. Seas around
1 foot.
GMZ033-034-012145
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
433 AM EST Sun Nov 1 2026
TODAY
East winds 10 to 15 knots. Seas 2 to 3 feet. Wave
Detail: East 3 feet at 4 seconds. Showers likely with a chance of
thunderstorms.
TONIGHT
East winds 10 to 15 knots. Seas 2 to 3 feet. Wave
Detail: East 3 feet at 4 seconds. Showers likely with a chance of
thunderstorms.
MONDAY
East winds 10 to 15 knots. Seas around 2 feet. Wave
Detail: East 2 feet at 4 seconds. A chance of showers and
thunderstorms.
MONDAY NIGHT
Northeast to east winds 10 to 15 knots, decreasing
to near 10 knots. Seas around 2 feet. A slight chance of showers
and thunderstorms.
TUESDAY
Northeast to east winds near 10 knots. Seas 1 to 2
feet. A slight chance of showers and thunderstorms.
TUESDAY NIGHT
Northeast to east winds near 10 knots. Seas
around 1 foot. A slight chance of showers and thunderstorms.
WEDNESDAY
East winds 5 to 10 knots, becoming variable and
decreasing to near 5 knots. Seas around 1 foot. A slight chance
of showers.
WEDNESDAY NIGHT
Variable winds near 5 knots, becoming northwest
and increasing to 5 to 10 knots. Seas around 1 foot.
THURSDAY
Northwest winds 5 to 10 knots. Seas around 1 foot. A
slight chance of showers.
THURSDAY NIGHT
Northwest winds 5 to 10 knots. Seas around 1
foot.
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