853
FZUS52 KKEY 080230
CWFKEY

Coastal Waters Forecast for the Florida Keys
National Weather Service Key West FL
1030 PM EDT Mon Sep 7 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.

GMZ005-081430-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
1030 PM EDT Mon Sep 7 2026

.SYNOPSIS...
The Florida Keys and surrounding coastal waters will be in a broad
nebulous pressure pattern. This will lead to light and at times
variable breezes through early Wednesday. During the day on
Wednesday, the western extent of the Atlantic Ridge will build
in, allowing breezes to become more easterly and freshen to
gentle to moderate. Waves of low-level moisture pushing across
the Keys will support elevated rain and thunder chances through
Tuesday, possibly returning to near normal by mid week.

The Approximate Shoreward Edge of the Gulf Stream as of September 2, 2026...

34 NM south-southwest of Dry Tortugas Light, on Loggerhead Key
34 NM south-southeast of Cosgrove Shoal Light, off the Marquesas Keys
26 NM south-southeast of Sand Key Light, off Key West
21 NM south-southeast of Looe Key, off Big Pine Key
17 NM southeast of Sombrero Key Light, off Marathon
10 NM southeast of Alligator Reef Light, off Islamorada
 6 NM east-southeast of Molasses Reef Light, off Key Largo
 1 NM east-southeast of Carysfort Reef Light, off Ocean Reef

This data courtesy of the Naval Oceanographic Office.

$$

GMZ031-081430-
Florida Bay including Barnes Sound, Blackwater Sound, and
Buttonwood Sound-
1030 PM EDT Mon Sep 7 2026

.OVERNIGHT...Variable winds near 5 knots, becoming east to
southeast. Bay waters smooth. A chance of showers with a slight
chance of thunderstorms.
.TUESDAY...Variable winds near 5 knots. Bay waters smooth. A
chance of showers with a slight chance of thunderstorms.
.TUESDAY NIGHT...Variable winds near 5 knots, becoming east 5 to
10 knots. Bay waters smooth, becoming smooth to a light chop. A
chance of showers with a slight chance of thunderstorms.
.WEDNESDAY...East winds near 10 knots. Bay waters a light chop. A
chance of showers with a slight chance of thunderstorms.
.WEDNESDAY 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.
.THURSDAY...East to southeast winds near 10 knots. Bay waters
a light chop. A chance of showers with a slight chance of
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 near 10 knots. Bay waters
a light chop. A chance of showers and thunderstorms.
.SATURDAY...East to southeast winds 5 to 10 knots. Bay waters
smooth to a light chop. Showers and thunderstorms likely.
.SATURDAY NIGHT...East winds near 10 knots. Bay waters a light
chop. A chance of showers and thunderstorms.

$$

GMZ032-035-081430-
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-
1030 PM EDT Mon Sep 7 2026

.OVERNIGHT...Variable winds near 5 knots, becoming southeast.
Seas less than 1 foot. Nearshore waters smooth. A chance of
showers and thunderstorms.
.TUESDAY...Southeast to south winds near 5 knots, becoming
variable. Seas less than 1 foot. Nearshore waters smooth. A chance
of showers and thunderstorms.
.TUESDAY NIGHT...Variable winds near 5 knots, becoming east 5 to
10 knots. Seas 1 foot or less. Nearshore waters smooth, becoming
smooth to a light chop. A chance of showers and thunderstorms.
.WEDNESDAY...East winds near 10 knots. Seas around 1 foot.
Nearshore waters a light chop. A chance of showers with a slight
chance of thunderstorms.
.WEDNESDAY NIGHT...Northeast to east winds 10 to 15 knots. Seas
around 1 foot, except 1 to 2 feet west of the Marquesas Keys.
Nearshore waters a light to moderate chop. A chance of showers
with a slight chance of thunderstorms.
.THURSDAY...East winds near 10 knots. Seas around 1 foot.
Nearshore waters a light chop. Showers likely with a chance of
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 1 foot or
less. Nearshore waters smooth to a light chop. A chance of
showers and thunderstorms.
.FRIDAY NIGHT...East to southeast winds near 10 knots. Seas around
1 foot, except 1 to 2 feet west of the Marquesas Keys. Nearshore
waters a light chop. A chance of showers and thunderstorms.
.SATURDAY...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.
.SATURDAY NIGHT...East to southeast winds near 10 knots. Seas 1
to 2 feet. Nearshore waters a light chop. Showers and
thunderstorms likely.

$$

GMZ042>044-081430-
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-
1030 PM EDT Mon Sep 7 2026

.OVERNIGHT...Variable winds near 5 knots, becoming southeast.
Seas 1 foot or less. Nearshore waters smooth. A chance of showers and
thunderstorms.
.TUESDAY...Southeast to south winds near 5 knots, becoming
variable. Seas 1 foot or less. Nearshore waters smooth. A chance
of showers and thunderstorms.
.TUESDAY NIGHT...Variable winds near 5 knots, becoming east 5 to
10 knots. Seas 1 foot or less, building to around 1 foot.
Nearshore waters smooth to a light chop. A chance of showers and
thunderstorms.
.WEDNESDAY...East winds near 10 knots. Seas 1 to 2 feet.
Nearshore waters a light chop. A chance of showers with a slight
chance of thunderstorms.
.WEDNESDAY NIGHT...Northeast to east winds 10 to 15 knots. Seas
around 2 feet. Nearshore waters a light to moderate chop. A
chance of showers with a slight chance of thunderstorms.
.THURSDAY...East winds near 10 knots. Seas 1 to 2 feet. Nearshore
waters smooth to a light chop. A chance of showers with a slight
chance of thunderstorms.
.THURSDAY NIGHT...East to southeast winds near 10 knots. Seas 1
to 2 feet. Nearshore waters smooth to 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 near 10 knots. Seas 1 to
2 feet. Nearshore waters a light chop. A chance of showers and
thunderstorms.
.SATURDAY...East to southeast winds near 10 knots. Seas 1 to 2
feet. Nearshore waters a light chop. A chance of showers and
thunderstorms.
.SATURDAY NIGHT...East to southeast winds 10 to 15 knots. Seas
around 2 feet. Nearshore waters a light to moderate chop. A
chance of showers and thunderstorms.

$$

GMZ052>055-072>075-081430-
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-
1030 PM EDT Mon Sep 7 2026

.OVERNIGHT...Variable winds near 5 knots, becoming southeast 5 to
10 knots. Seas around 1 foot. Wave Detail: East to southeast 1
foot at 2 seconds. A slight chance of showers and thunderstorms.
.TUESDAY...Variable winds near 5 knots, becoming northeast to
east 5 to 10 knots. Seas around 1 foot. Wave Detail: East to
southeast 1 foot at 2 seconds. A chance of showers and
thunderstorms.
.TUESDAY NIGHT...Northeast to east winds 5 to 10 knots, becoming
east near 10 knots. Seas 1 to 2 feet. Wave Detail: East 2 feet at
3 seconds. A chance of showers and thunderstorms.
.WEDNESDAY...Northeast to east winds near 10 knots. Seas around 2
feet. A chance of showers with a slight chance of thunderstorms.
.WEDNESDAY NIGHT...Northeast to east winds 10 to 15 knots. Seas
2 to 3 feet. A chance of showers with a slight chance of
thunderstorms.
.THURSDAY...Northeast to east winds near 10 knots. Seas 2 to 3
feet. A chance of showers with a slight chance of thunderstorms.
.THURSDAY NIGHT...East winds near 10 knots. Seas around 2 feet. A
chance of showers and thunderstorms.
.FRIDAY...East to southeast winds 5 to 10 knots. Seas 1 to
2 feet. A chance of showers and thunderstorms.
.FRIDAY NIGHT...East to southeast winds near 10 knots. Seas around
2 feet. A chance of showers and thunderstorms.
.SATURDAY...East to southeast winds near 10 knots. Seas around 2
feet. A chance of showers and thunderstorms.
.SATURDAY NIGHT...East to southeast winds 10 to 15 knots. Seas
2 to 3 feet. A chance of showers and thunderstorms.

$$

GMZ033-034-081430-
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-
1030 PM EDT Mon Sep 7 2026

.OVERNIGHT...Northwest to north winds near 5 knots, becoming east
to southeast. Seas 1 foot or less. A chance of showers and
thunderstorms.
.TUESDAY...East to southeast winds near 5 knots, becoming
northeast to east. Seas 1 foot or less. A chance of showers and
thunderstorms.
.TUESDAY NIGHT...Northeast to east winds 5 to 10 knots. Seas
1 foot or less, building to around 1 foot. A chance of showers and
thunderstorms.
.WEDNESDAY...East winds 5 to 10 knots, briefly decreasing to near
5 knots in the afternoon. Seas around 1 foot. A chance of showers
with a slight chance of thunderstorms.
.WEDNESDAY NIGHT...Northeast to east winds near 10 knots, becoming
east 10 to 15 knots. Seas building to 1 to 2 feet. A chance of
showers with a slight chance of thunderstorms.
.THURSDAY...East winds near 10 knots. Seas 1 to 2 feet, subsiding
to around 1 foot. A chance of showers with a slight chance of
thunderstorms.
.THURSDAY NIGHT...East to southeast winds near 10 knots. Seas
around 1 foot. A chance of showers and thunderstorms.
.FRIDAY...East to southeast winds 5 to 10 knots, decreasing to
near 5 knots. Seas around 1 foot. A chance of showers and
thunderstorms.
.FRIDAY NIGHT...East to southeast winds increasing to 5 to 10
knots. Seas building to 1 to 2 feet. A chance of showers and
thunderstorms.
.SATURDAY...East to southeast winds 5 to 10 knots. Seas 1 to 2
feet. A chance of showers and thunderstorms.
.SATURDAY NIGHT...East to southeast winds near 10 knots. Seas
around 2 feet. A chance of showers and thunderstorms.

$$