391
FZUS52 KKEY 150220
CWFKEY

Coastal Waters Forecast for the Florida Keys
National Weather Service Key West FL
1020 PM EDT Mon Sep 14 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.

GMZ005-151430-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
1020 PM EDT Mon Sep 14 2026

.SYNOPSIS...
Light and variable winds will start to freshen and veer easterly
tonight. Breezes will continue to gradually freshen out of the
northeast to east over the next few days as a continental high
builds southward towards our area. Expect breezes to peak in the
moderate range late Tuesday and late Wednesday. Near normal rain
chances will trend considerably upwards through mid week as broad
troughing and increasing moisture moves in from the east.

The Approximate Shoreward Edge of the Gulf Stream as of September
11, 2026...

26 NM south of Dry Tortugas Light, on Loggerhead Key
15 NM south of Cosgrove Shoal Light, off the Marquesas Keys
15 NM south of Sand Key Light, off Key West
11 NM south-southeast of Looe Key, off Big Pine Key
 8 NM southeast of Sombrero Key Light, off Marathon
 6 NM southeast of Alligator Reef Light, off Islamorada
 2 NM southeast of Molasses Reef Light, off Key Largo
 1 NM east-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.

$$

GMZ031-151430-
Florida Bay including Barnes Sound, Blackwater Sound, and
Buttonwood Sound-
1020 PM EDT Mon Sep 14 2026

.OVERNIGHT...East winds near 5 knots increasing to 5 to 10 knots.
Bay waters smooth, becoming smooth to a light chop. A slight
chance of showers and thunderstorms.
.TUESDAY...East winds near 10 knots, becoming northeast to east
near 15 knots late. Bay waters a light chop, becoming a moderate
chop. A chance of showers and thunderstorms.
.TUESDAY NIGHT...Northeast to east winds near 15 knots, decreasing
to 10 to 15 knots. Bay waters a moderate chop, becoming a light
to moderate chop. A chance of showers and thunderstorms.
.WEDNESDAY...Northeast to east winds 10 to 15 knots. Bay waters a
light to moderate chop. A chance of showers and thunderstorms.
.WEDNESDAY NIGHT...Northeast to east winds near 15 knots,
decreasing to 10 to 15 knots. Bay waters a moderate chop,
becoming a light to moderate chop. A chance of showers and
thunderstorms.
.THURSDAY...East winds near 10 knots. Bay waters a light chop.
Showers likely with a chance of thunderstorms.
.THURSDAY NIGHT...East winds near 10 knots. Bay waters a light
chop. Showers likely with a chance of thunderstorms.
.FRIDAY...East to southeast winds near 10 knots. Bay waters a
light chop. Showers and thunderstorms likely.
.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. A chance of thunderstorms. Showers
likely.
.SATURDAY NIGHT...East to southeast winds near 5 knots. Bay
waters smooth. A chance of showers and thunderstorms.

$$

GMZ032-035-151430-
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-
1020 PM EDT Mon Sep 14 2026

.OVERNIGHT...East winds near 5 knots, increasing to 5 to 10
knots. Seas 1 foot or less. Nearshore waters smooth, becoming
smooth to a light chop. A chance of showers and thunderstorms.
.TUESDAY...East winds near 10 knots, increasing to 10 to 15
knots late. Seas around 1 foot. Nearshore waters a light chop,
becoming a light to moderate chop. A chance of showers and
thunderstorms.
.TUESDAY NIGHT...Northeast to east winds near 15 knots. Seas 1 to
2 feet. Nearshore waters a moderate chop. A chance of showers and
thunderstorms.
.WEDNESDAY...Northeast to east winds 10 to 15 knots. Seas 1 to
2 feet. Nearshore waters a light to moderate chop. A chance of
showers and thunderstorms.
.WEDNESDAY NIGHT...Northeast to east winds near 15 knots,
decreasing to 10 to 15 knots. Seas 1 to 2 feet. Nearshore waters a
moderate chop, becoming a light to moderate chop. Showers likely
with a chance of thunderstorms.
.THURSDAY...East winds near 10 knots. Seas 1 to 2 feet. Nearshore
waters a light chop. Showers likely with a chance of
thunderstorms.
.THURSDAY NIGHT...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.
.FRIDAY...East to southeast winds near 10 knots. Seas around 1
foot. Nearshore waters a light chop. Showers likely with a chance
of thunderstorms.
.FRIDAY NIGHT...East to southeast winds near 10 knots. Seas around
1 foot. Nearshore waters a light chop. Showers likely with a
chance of thunderstorms.
.SATURDAY...East to southeast winds 5 to 10 knots. Seas 1 foot or
less. Nearshore waters smooth to a light chop. A chance of
thunderstorms. Showers likely.
.SATURDAY 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.

$$

GMZ042>044-151430-
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-
1020 PM EDT Mon Sep 14 2026

.OVERNIGHT...East winds near 5 knots, increasing to 5 to 10
knots. Seas around 1 foot. Nearshore waters smooth, becoming
smooth to a light chop. A chance of showers and thunderstorms.
.TUESDAY...East winds near 10 knots, increasing to 10 to 15
knots. Seas 1 to 2 feet. Nearshore waters a light chop, becoming a
light to moderate chop. A chance of showers and thunderstorms.
.TUESDAY NIGHT...East winds near 15 knots, decreasing to 10 to 15
knots. Seas around 2 feet. Nearshore waters a moderate chop,
becoming a light to moderate chop. Showers likely with a chance
of thunderstorms.
.WEDNESDAY...Northeast to east winds 10 to 15 knots. Seas 1 to
2 feet. Nearshore waters a light to moderate chop. A chance of
showers and thunderstorms.
.WEDNESDAY NIGHT...Northeast to east winds near 15 knots,
decreasing to 10 to 15 knots. Seas 1 to 2 feet. Nearshore waters a
moderate chop, becoming a light to moderate chop. Showers likely
with a chance of thunderstorms.
.THURSDAY...East winds near 10 knots. Seas 1 to 2 feet. Nearshore
waters a light chop. Showers likely with a chance of
thunderstorms.
.THURSDAY NIGHT...East to southeast winds 10 to 15 knots. Seas
1 to 2 feet. Nearshore waters a light to moderate chop. Showers
likely with a chance of thunderstorms.
.FRIDAY...East to southeast winds near 10 knots. Seas 1 to 2
feet. Nearshore waters a light chop. A chance of showers and
thunderstorms.
.FRIDAY NIGHT...East to southeast winds near 10 knots. Seas
around 1 foot. 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 5 to 10 knots. Seas
1 foot or less. Nearshore waters smooth to a light chop. A chance
of showers and thunderstorms.

$$

GMZ052>055-072>075-151430-
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-
1020 PM EDT Mon Sep 14 2026

.OVERNIGHT...Northeast to east winds 5 to 10 knots, increasing to
near 10 knots. Seas 1 to 2 feet. Wave Detail: East 2 feet at 4
seconds. A chance of showers and thunderstorms.
.TUESDAY...East winds near 10 knots, increasing to 10 to 15
knots. Seas around 2 feet. Wave Detail: East 2 feet at 4 seconds.
A slight chance of showers and thunderstorms.
.TUESDAY NIGHT...Northeast to east winds 10 to 15 knots. Seas
2 to 3 feet. Wave Detail: Northeast to east 3 feet at 4 seconds.
Showers likely with a chance of thunderstorms.
.WEDNESDAY...Northeast to east winds 10 to 15 knots. Seas 2 to
3 feet. A chance of showers and thunderstorms.
.WEDNESDAY NIGHT...East winds 10 to 15 knots. Seas 2 to 3 feet.
Showers likely with a chance of thunderstorms.
.THURSDAY...East winds near 10 knots. Seas 2 to 3 feet. A chance
of showers and thunderstorms.
.THURSDAY NIGHT...East to southeast winds 10 to 15 knots. Seas
2 to 3 feet. Showers likely with a chance of thunderstorms.
.FRIDAY...East to southeast winds 5 to 10 knots. Seas around
2 feet. A chance of showers and thunderstorms.
.FRIDAY NIGHT...East to southeast winds near 10 knots. Seas 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 5 to 10 knots. Seas
around 1 foot. A chance of showers and thunderstorms.

$$

GMZ033-034-151430-
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-
1020 PM EDT Mon Sep 14 2026

.OVERNIGHT...East winds near 5 knots, increasing to 5 to 10
knots. Seas 1 foot or less. Wave Detail: Northeast 1 foot at 2
seconds. A chance of showers and thunderstorms.
.TUESDAY...East winds near 10 knots. Seas around 1 foot. Wave
Detail: East to southeast 1 foot at 3 seconds. A chance of showers
and thunderstorms.
.TUESDAY NIGHT...East winds 10 to 15 knots. Seas building to 2 to
3 feet. Wave Detail: Northeast to east 2 feet at 3 seconds.
Showers likely with a chance of thunderstorms.
.WEDNESDAY...Northeast to east winds near 15 knots, decreasing to 10
to 15 knots. Seas 1 to 3 feet. Showers likely with a chance of
thunderstorms.
.WEDNESDAY NIGHT...Northeast to east winds 15 to 20 knots. Seas 2
to 4 feet, occasionally to 5 feet. Showers likely with a chance
of thunderstorms.
.THURSDAY...East winds 10 to 15 knots. Seas 2 to 3 feet. Showers
likely with a chance of thunderstorms.
.THURSDAY NIGHT...East winds 10 to 15 knots. Seas 1 to 3 feet.
Showers with a chance of thunderstorms.
.FRIDAY...East to southeast winds 5 to 10 knots. Seas 1 to
2 feet. Showers likely with a chance of thunderstorms.
.FRIDAY NIGHT...East to southeast winds 5 to 10 knots. Seas 1 to
2 feet. Showers likely with a chance of thunderstorms.
.SATURDAY...East to southeast winds 5 to 10 knots. Seas around 1
foot. Showers likely with a chance of thunderstorms.
.SATURDAY NIGHT...East to southeast winds near 5 knots. Seas
1 foot or less. A chance of showers and thunderstorms.

$$