476
FZUS52 KKEY 302124
CWFKEY

Coastal Waters Forecast for the Florida Keys
National Weather Service Key West FL
524 PM EDT Sun Aug 30 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.

GMZ005-310930-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
524 PM EDT Sun Aug 30 2026

.SYNOPSIS...
The western periphery of an Atlantic high remains in control of
the Keys for the next several days. Therefore, expect continued
peaking and lulling breezes. The direction will also shift over
the coming days with east to southeasterly breezes overnight and
in the morning with northeast to east breezes late afternoon and
evening. In addition, the overall flow will keep deep moisture in
place across the region with daily chances of showers and
thunderstorms. Locally hazardous winds and seas are expected in
the vicinity of thunderstorm activity.

The Approximate Shoreward Edge of the Gulf Stream as of August 26,
2026...

32 NM south of Dry Tortugas Light, on Loggerhead Key
 9 NM south-southeast of Cosgrove Shoal Light, off the Marquesas Keys
 7 NM south-southeast of Sand Key Light, off Key West
 6 NM south-southeast of Looe Key, off Big Pine Key
 7 NM south-southeast of Sombrero Key Light, off Marathon
 4 NM southeast of Alligator Reef Light, off Islamorada
 1 NM west-northwest of Molasses Reef Light, off Key Largo
 1 NM east-southeast of Carysfort Reef Light, off Ocean Reef

Gulf Stream Information Courtesy of the Naval Oceanographic
Office.

$$

GMZ031-310930-
Florida Bay including Barnes Sound, Blackwater Sound, and
Buttonwood Sound-
524 PM EDT Sun Aug 30 2026

.TONIGHT...East winds near 10 knots. Bay waters a light chop. A
chance of showers and thunderstorms.
.MONDAY...East to southeast winds 5 to 10 knots. Bay waters
smooth to a light chop. A chance of showers and thunderstorms.
.MONDAY NIGHT...East winds 5 to 10 knots. Bay waters smooth to a
light chop. A chance of showers and thunderstorms.
.TUESDAY...East to southeast winds 5 to 10 knots. Bay waters
smooth to a light chop. Showers likely with a chance of
thunderstorms.
.TUESDAY NIGHT...East winds 10 to 15 knots. Bay waters a light to
moderate chop. A chance of showers and thunderstorms.
.WEDNESDAY...East winds near 10 knots. Bay waters a light chop.
Showers likely with a chance of thunderstorms.
.WEDNESDAY NIGHT...East winds 10 to 15 knots. Bay waters a light
to moderate chop. A chance of showers and thunderstorms.
.THURSDAY...East to southeast winds near 10 knots. Bay waters a
light chop. Showers and thunderstorms likely.
.THURSDAY NIGHT...East to southeast winds 10 to 15 knots. Bay
waters a light to moderate chop. Showers likely with a chance of
thunderstorms.
.FRIDAY...Southeast to south winds near 10 knots. Bay waters a
light chop. Showers and thunderstorms likely.
.FRIDAY NIGHT...Southeast winds 5 to 10 knots. Bay waters smooth
to a light chop. A chance of showers and thunderstorms.

$$

GMZ032-035-310930-
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-
524 PM EDT Sun Aug 30 2026

.TONIGHT...East winds near 10 knots. Seas around 1 foot.
Nearshore waters a light chop. A chance of showers and
thunderstorms.
.MONDAY...East winds 5 to 10 knots. Seas 1 foot or less.
Nearshore waters smooth to a light chop. A chance of showers and
thunderstorms.
.MONDAY NIGHT...East winds near 10 knots. Seas around 1 foot.
Nearshore waters a light chop. A chance of showers and
thunderstorms.
.TUESDAY...East to southeast winds 5 to 10 knots. Seas 1 foot or
less. Nearshore waters smooth to a light chop. Showers likely
with a chance of thunderstorms.
.TUESDAY NIGHT...East winds 10 to 15 knots. Seas around 1 foot,
except building to 1 to 2 feet west of the Marquesas Keys.
Nearshore waters a light to moderate chop. A chance of showers and
thunderstorms.
.WEDNESDAY...East winds 5 to 10 knots. Seas 1 foot or less.
Nearshore waters smooth to a light chop. Showers likely with a
chance of thunderstorms.
.WEDNESDAY NIGHT...East winds 10 to 15 knots. Seas around 1 foot.
Nearshore waters a light to moderate chop. A chance of showers
and thunderstorms.
.THURSDAY...East winds near 10 knots. Seas around 1 foot.
Nearshore waters a light chop. Showers and thunderstorms likely.
.THURSDAY NIGHT...East to southeast winds 10 to 15 knots. Seas
around 1 foot. Nearshore waters a light to moderate chop. Showers
and thunderstorms likely.
.FRIDAY...Southeast to south winds 5 to 10 knots. Seas 1 foot or
less. Nearshore waters smooth to a light chop. A chance of
thunderstorms. A chance of showers.
.FRIDAY NIGHT...Southeast winds near 10 knots. Seas around 1 foot.
Nearshore waters a light chop. A chance of showers and
thunderstorms.

$$

GMZ042>044-310930-
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-
524 PM EDT Sun Aug 30 2026

.TONIGHT...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...East winds 5 to 10 knots. Seas 1 to 2 feet. Nearshore
waters smooth to a light chop. A chance of showers and
thunderstorms.
.MONDAY NIGHT...East winds near 10 knots. Seas 1 to 2 feet.
Nearshore waters a light chop. A chance of showers and
thunderstorms.
.TUESDAY...East to southeast winds 5 to 10 knots. Seas subsiding
to around 1 foot. Nearshore waters smooth to a light chop. A
chance of showers and thunderstorms.
.TUESDAY NIGHT...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...East winds 5 to 10 knots. Seas 1 to 2 feet.
Nearshore waters smooth to a light chop. A chance of showers and
thunderstorms.
.WEDNESDAY NIGHT...East winds 10 to 15 knots. Seas 1 to 2 feet.
Nearshore waters a light to moderate chop. A chance of showers
and thunderstorms.
.THURSDAY...East to southeast winds near 10 knots. Seas 1 to
2 feet. Nearshore waters a light chop. Showers and thunderstorms
likely.
.THURSDAY NIGHT...East to southeast winds 10 to 15 knots. Seas
1 to 2 feet. Nearshore waters a light to moderate chop.
Showers and thunderstorms likely.
.FRIDAY...Southeast to south winds 5 to 10 knots. Seas 1 to
2 feet. Nearshore waters smooth to a light chop. A chance of
showers and thunderstorms.
.FRIDAY NIGHT...Southeast winds 5 to 10 knots. Seas 1 to 2 feet.
Nearshore waters smooth to a light chop. A chance of showers and
thunderstorms.

$$

GMZ052>055-072>075-310930-
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-
524 PM EDT Sun Aug 30 2026

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

$$

GMZ033-034-310930-
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-
524 PM EDT Sun Aug 30 2026

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

$$