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Hurricane Symbol Storm Special! View the latest observations near Atlantic Tropical Storm Odette.

National Weather Service Marine Forecast FZUS52 KKEY

FZUS52 KKEY 180236
CWFKEY

Coastal Waters Forecast for the Florida Keys
National Weather Service Key West FL
1036 PM EDT Fri Sep 17 2021

Florida Bay, Hawk Channel and Straits of Florida from Ocean Reef to
south of Dry Tortugas, and the extreme southeastern Gulf of
Mexico, 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.

GMZ005-180845-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
1036 PM EDT Fri Sep 17 2021

SYNOPSIS
Light and variable breezes this evening will turn
northeast late tonight. High pressure will build west across
Florida tonight and Saturday, bringing gentle easterly breezes
by Sunday. Northeast to east breezes will peak and lull Sunday
night through Wednesday, then become light and variable by
Wednesday night.

The Approximate Shoreward Edge of the Gulf Stream as of
September 16...

32 NM South of Dry Tortugas Light...on Loggerhead Key.
23 NM South of Cosgrove Shoal Light...off the Marquesas Keys.
21 NM South of Sand Key Light...off Key West.
19 NM South of Looe Key...off Big Pine Key.
20 NM South of Sombrero Key Light...off Marathon.
21 NM Southeast of Alligator Reef Light...off Islamorada.
19 NM Southeast of Molasses Reef Light...off Key Largo.
13 NM East of Carysfort Reef Light...off Ocean Reef.

Gulf Stream Information Courtesy of the Naval Oceanographic
Office.



GMZ031-180845-
Florida Bay including Barnes Sound, Blackwater Sound, and
Buttonwood Sound-
1036 PM EDT Fri Sep 17 2021

OVERNIGHT
Variable winds near 5 knots, becoming north to
northeast. Bay waters smooth. Isolated showers and thunderstorms.

SATURDAY
Northeast to east winds near 5 knots, becoming
southeast in the afternoon. Bay waters smooth. Scattered showers
and isolated thunderstorms.

SATURDAY NIGHT
Variable winds near 5 knots, becoming northeast
in the late evening and overnight. Bay waters smooth. Isolated
showers and thunderstorms.

SUNDAY
Northeast to east winds near 5 knots, becoming east
and increasing to 5 to 10 knots in the afternoon. Bay waters
becoming smooth to a light chop. Scattered showers and isolated
thunderstorms.

SUNDAY NIGHT
Northeast to east winds 5 to 10 knots. Bay waters
smooth to a light chop. Scattered showers and isolated
thunderstorms.

MONDAY
East winds 5 to 10 knots. Bay waters smooth to a light
chop. Scattered showers and isolated thunderstorms.

MONDAY NIGHT AND TUESDAY
East winds near 10 knots. Bay waters
a light chop. Scattered showers and isolated thunderstorms.

TUESDAY NIGHT
Northeast to east winds near 10 knots. Bay
waters a light chop. Scattered showers and isolated
thunderstorms.

WEDNESDAY
East winds 5 to 10 knots, becoming southeast. Bay
waters smooth to a light chop. Scattered showers and isolated
thunderstorms.

WEDNESDAY NIGHT
East to southeast winds near 5 knots. Bay
waters smooth. Scattered showers and isolated thunderstorms.



GMZ032-035-180845-
Bayside and Gulf side from Craig Key to west end of Seven Mile
Bridge-
Gulf of Mexico from west end of Seven Mile Bridge to Halfmoon
Shoal out to 5 Fathoms-
1036 PM EDT Fri Sep 17 2021

OVERNIGHT
Variable winds near 5 knots, becoming northeast.
Seas 1 foot or less. Nearshore waters smooth to a light chop. 
Isolated showers and thunderstorms.

SATURDAY
East winds 5 to 10 knots. Seas 1 foot or less.
Nearshore waters smooth to a light chop. Isolated showers and
thunderstorms.

SATURDAY NIGHT
Northeast winds 5 to 10 knots. Seas 1 foot or
less. Nearshore waters smooth to a light chop. Isolated showers
and thunderstorms.

SUNDAY
Northeast to east winds 5 to 10 knots. Seas 1 foot or
less. Nearshore waters smooth to a light chop. Scattered showers
and isolated thunderstorms.

SUNDAY NIGHT
Northeast to east winds 5 to 10 knots. Seas 1
foot or less. Nearshore waters smooth to a light chop. Scattered
showers and isolated thunderstorms.

MONDAY
East winds near 10 knots. Seas around 1 foot. Nearshore
waters a light chop. Scattered showers and isolated
thunderstorms.

MONDAY NIGHT
Northeast to east winds 10 to 15 knots. Seas 1 to
2 feet. Nearshore waters a light to moderate chop. Scattered
showers and isolated thunderstorms.

TUESDAY
East winds decreasing to 5 to 10 knots. Seas around 1
foot. Nearshore waters becoming smooth to a light chop. Scattered
showers and isolated thunderstorms.

TUESDAY NIGHT
Northeast to east winds near 10 knots. Seas 1
foot or less. Nearshore waters smooth to a light chop. Scattered
showers and isolated thunderstorms.

WEDNESDAY
East winds 5 to 10 knots, becoming variable and
decreasing to near 5 knots. Seas 1 foot or less. Nearshore waters
smooth to a light chop, becoming smooth. Scattered showers and
isolated thunderstorms.

WEDNESDAY NIGHT
Variable winds near 5 knots. Seas less than 1
foot. Nearshore waters smooth. Scattered showers and isolated
thunderstorms.



GMZ042>044-180845-
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-
1036 PM EDT Fri Sep 17 2021

OVERNIGHT
Variable winds 5 to 10 knots, becoming northeast.
Seas around 1 foot. Nearshore waters smooth to a light chop.
Isolated showers and thunderstorms.

SATURDAY
East winds 5 to 10 knots. Seas around 1 foot.
Nearshore waters smooth to a light chop. Isolated showers and
thunderstorms.

SATURDAY NIGHT
Northeast winds 5 to 10 knots. Seas around 1
foot. Nearshore waters smooth to a light chop. Isolated showers
and thunderstorms.

SUNDAY
Northeast to east winds 5 to 10 knots. Seas around 1
foot. Nearshore waters smooth to a light chop. Scattered showers
and isolated thunderstorms.

SUNDAY NIGHT
Northeast to east winds increasing to near 10
knots. Seas building to 1 to 2 feet. Nearshore waters becoming a
light chop. Scattered showers and isolated thunderstorms.

MONDAY
East winds near 10 knots. Seas 1 to 2 feet. Nearshore
waters a light chop. Scattered showers and isolated
thunderstorms.

MONDAY NIGHT
Northeast to east winds 10 to 15 knots. Seas
around 2 feet. Nearshore waters a light to moderate chop.
Scattered showers and isolated thunderstorms.

TUESDAY
East winds near 10 knots. Seas 1 to 2 feet. Nearshore
waters a light chop. Scattered showers and isolated
thunderstorms.

TUESDAY NIGHT
Northeast to east winds near 10 knots. Seas 1 to
2 feet. Nearshore waters a light chop. Scattered showers and
isolated thunderstorms.

WEDNESDAY
Northeast to east winds near 5 knots. Seas around 1
foot. Nearshore waters smooth. Scattered showers and isolated
thunderstorms.

WEDNESDAY NIGHT
Variable winds near 5 knots. Seas 1 foot or
less. Nearshore waters smooth. Scattered showers and isolated
thunderstorms.



GMZ052>055-072>075-180845-
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-
1036 PM EDT Fri Sep 17 2021

OVERNIGHT
Variable winds 5 to 10 knots, becoming northeast to
east. Seas 1 to 2 feet. Isolated showers and thunderstorms.

SATURDAY
East winds 5 to 10 knots. Seas 1 to 2 feet. Isolated
showers and thunderstorms.

SATURDAY NIGHT
Northeast to east winds 5 to 10 knots. Seas 1
to 2 feet. Isolated showers and thunderstorms.

SUNDAY
Northeast to east winds near 10 knots. Seas around 1 feet.
Scattered showers and isolated thunderstorms.

SUNDAY NIGHT
Northeast to east winds 10 to 15 knots. Seas 2 to
3 feet. Scattered showers and isolated thunderstorms.

MONDAY
East winds 10 to 15 knots. Seas 2 to 3 feet. Scattered
showers and isolated thunderstorms.

MONDAY NIGHT AND TUESDAY
Northeast to east winds 10 to 15
knots. Seas 2 to 3 feet. Scattered showers and isolated
thunderstorms.

TUESDAY NIGHT
Northeast to east winds near 10 knots. Seas
around 2 feet. Scattered showers and isolated thunderstorms.

WEDNESDAY
East winds 5 to 10 knots. Seas 1 to 2 feet.
Scattered showers and isolated thunderstorms.

WEDNESDAY NIGHT
Northeast to east winds 5 to 10 knots. Seas
1 to 2 feet. Scattered showers and isolated thunderstorms.



GMZ033-034-180845-
Gulf waters from East Cape Sable to Chokoloskee 20 to 60 NM out
and beyond 5 fathoms-
Gulf of Mexico including Dry Tortugas and Rebecca Shoal Channel-
1036 PM EDT Fri Sep 17 2021

OVERNIGHT
Variable winds near 5 knots, becoming northeast.
Seas 1 to 2 feet. Isolated showers and thunderstorms.

SATURDAY
Northeast to east winds 5 to 10 knots, becoming
variable late in the afternoon. Seas 1 to 2 feet. Isolated
showers and thunderstorms.

SATURDAY NIGHT
North to northeast winds 5 to 10 knots. Seas
around 1 foot. Isolated showers and thunderstorms.

SUNDAY
Northeast to east winds 5 to 10 knots, becoming variable
and decreasing to near 5 knots in the afternoon. Seas around 1
foot. Scattered showers and isolated thunderstorms.

SUNDAY NIGHT
Northeast winds 5 to 10 knots. Seas around 1
foot. Scattered showers and isolated thunderstorms.

MONDAY
East winds 5 to 10 knots. Seas around 1 foot. Scattered
showers and isolated thunderstorms.

MONDAY NIGHT THROUGH TUESDAY NIGHT
Northeast to east winds 5
to 10 knots. Seas 1 to 2 feet. Scattered showers and isolated
thunderstorms.

WEDNESDAY
East winds near 5 knots, becoming variable. Seas 1
foot or less. Scattered showers and isolated thunderstorms.

WEDNESDAY NIGHT
Variable winds near 5 knots. Seas 1 foot or
less. Scattered showers and isolated thunderstorms.