320
FZUS52 KKEY 290824
CWFKEY

Coastal Waters Forecast for the Florida Keys
National Weather Service Key West FL
424 AM EDT Sat Aug 29 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.

GMZ005-292030-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
424 AM EDT Sat Aug 29 2026

.SYNOPSIS...The western periphery of an Atlantic high is expected
to maintain control of the Keys for the next several days. This
will continue to promote peaking and lulling breezes. The
direction will also shift over the coming days with east to
southeast 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.

$$

GMZ031-292030-
Florida Bay including Barnes Sound, Blackwater Sound, and
Buttonwood Sound-
424 AM EDT Sat Aug 29 2026

.TODAY...East to southeast winds near 10 knots. Bay waters a
light chop. A chance of showers and thunderstorms.
.TONIGHT...Northeast to east winds 10 to 15 knots, becoming east
to southeast after midnight. Bay waters a light to moderate chop.
A chance of showers and thunderstorms.
.SUNDAY...East to southeast winds near 10 knots. Bay waters a
light chop. A chance of showers and thunderstorms.
.SUNDAY NIGHT...Northeast to east winds near 10 knots, becoming
east to southeast and increasing to 10 to 15 knots. Bay waters a
light chop, becoming a light to moderate chop. A chance of showers
and thunderstorms.
.MONDAY...East to southeast winds 5 to 10 knots, becoming
northeast to east. Bay waters smooth to a light chop. A chance of
showers and thunderstorms.
.MONDAY NIGHT...Northeast to east winds 10 to 15 knots. Bay
waters a light to moderate chop. A chance of showers and
thunderstorms.
.TUESDAY...East winds near 10 knots. Bay waters a light chop.
Showers likely with a chance of thunderstorms.
.TUESDAY NIGHT...East winds near 10 knots. Bay waters a light
chop. A chance of showers and thunderstorms.
.WEDNESDAY...East winds near 10 knots. Bay waters a light chop.
Showers and thunderstorms likely.
.WEDNESDAY NIGHT...Northeast to east winds 10 to 15 knots. Bay
waters a light to moderate chop. Showers likely with a chance of
thunderstorms.

$$

GMZ032-035-292030-
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-
424 AM EDT Sat Aug 29 2026

.TODAY...East to southeast winds near 10 knots. Seas around 1
foot. Nearshore waters a light chop. A chance of showers and
thunderstorms.
.TONIGHT...Northeast to east winds 10 to 15 knots, becoming east
to southeast. Seas 1 to 2 feet. Nearshore waters a light to
moderate chop. A chance of showers and thunderstorms.
.SUNDAY...East to southeast winds near 10 knots, decreasing to 5
to 10 knots. Seas 1 to 2 feet, subsiding to around 1 foot.
Nearshore waters a light chop, becoming smooth to a light chop.
Showers likely with a chance of thunderstorms.
.SUNDAY NIGHT...Northeast to east winds near 10 knots, becoming
east to southeast and increasing briefly 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.
.MONDAY...East to southeast winds near 10 knots, becoming
northeast to east. Seas around 1 foot. Nearshore waters a light
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 chance of
showers and thunderstorms.
.TUESDAY...East winds near 10 knots. Seas 1 to 2 feet. Nearshore
waters a light chop. Showers likely with a chance of
thunderstorms.
.TUESDAY NIGHT...East winds near 10 knots. Seas around 1 foot.
Nearshore waters a light chop. Showers and thunderstorms likely.
.WEDNESDAY...East winds 5 to 10 knots. Seas 1 foot or less.
Nearshore waters smooth to a light chop. Showers and
thunderstorms likely.
.WEDNESDAY NIGHT...East winds 10 to 15 knots. Seas around 1 foot.
Nearshore waters a light to moderate chop. Thunderstorms likely.
Showers likely.

$$

GMZ042>044-292030-
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-
424 AM EDT Sat Aug 29 2026

.TODAY...East to southeast winds near 10 knots. Seas 1 to 2 feet.
Nearshore waters a light chop. A chance of showers and
thunderstorms.
.TONIGHT...Northeast to east winds 10 to 15 knots, becoming east
to southeast. Seas around 2 feet. Nearshore waters a light to
moderate chop. A chance of showers and thunderstorms.
.SUNDAY...East to southeast winds near 10 knots, decreasing to 5
to 10 knots. Seas around 2 feet, subsiding to 1 to 2 feet.
Nearshore waters a light chop, becoming smooth to a light chop. A
chance of showers and thunderstorms.
.SUNDAY NIGHT...Northeast to east winds 10 to 15 knots, becoming
east to southeast. Seas around 2 feet. Nearshore waters a light
to moderate chop. A chance of showers and thunderstorms.
.MONDAY...East to southeast winds 5 to 10 knots, becoming
northeast to east and increasing to near 10 knots. Seas 1 to 2
feet. Nearshore waters smooth to a light chop, becoming a light
chop. A chance of showers and thunderstorms.
.MONDAY NIGHT...Northeast to east winds 10 to 15 knots, becoming
east and increasing to near 15 knots. Seas around 2 feet,
building to 2 to 3 feet. Nearshore waters a light to moderate
chop, becoming a moderate chop. A chance of showers and
thunderstorms.
.TUESDAY...East winds near 10 knots. Seas around 2 feet.
Nearshore waters a light chop. A chance of showers and
thunderstorms.
.TUESDAY NIGHT...East winds near 10 knots. Seas 1 to 2 feet.
Nearshore waters a light chop. Showers likely with a chance of
thunderstorms.
.WEDNESDAY...East winds 5 to 10 knots. Seas 1 to 2 feet.
Nearshore waters smooth to a light chop. Showers and
thunderstorms likely.
.WEDNESDAY 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.

$$

GMZ052>055-072>075-292030-
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-
424 AM EDT Sat Aug 29 2026

.TODAY...East winds near 10 knots. Seas around 2 feet. Wave
Detail: East 2 feet at 4 seconds. A chance of showers and
thunderstorms.
.TONIGHT...Northeast to east winds 10 to 15 knots, becoming east
to southeast. Seas 2 to 3 feet. Wave Detail: East 3 feet at 4
seconds. A chance of showers and thunderstorms.
.SUNDAY...East to southeast winds 10 to 15 knots, becoming
northeast to east and decreasing to 5 to 10 knots. Seas around 2
feet. Wave Detail: East 2 feet at 5 seconds. A chance of showers
and thunderstorms.
.SUNDAY NIGHT...Northeast to east winds near 10 knots, becoming
east to southeast and increasing to 10 to 15 knots. Seas 2 to 3
feet. A chance of showers and thunderstorms.
.MONDAY...East to southeast winds near 10 knots, becoming
northeast to east. Seas around 2 feet. A chance of showers and
thunderstorms.
.MONDAY NIGHT...Northeast to east winds 10 to 15 knots, becoming
east and increasing to near 15 knots. Seas 2 to 3 feet, building
to 2 to 4 feet, occasionally to 5 feet. A chance of showers and
thunderstorms.
.TUESDAY...East winds 10 to 15 knots, becoming northeast to east
and decreasing to near 10 knots. Seas 2 to 3 feet. A chance of
showers and thunderstorms.
.TUESDAY NIGHT...East winds near 10 knots. Seas around 2 feet. A
chance of showers and thunderstorms.
.WEDNESDAY...East winds 5 to 10 knots. Seas 1 to 2 feet. Showers
likely with a chance of thunderstorms.
.WEDNESDAY NIGHT...East winds 10 to 15 knots. Seas around 2 feet.
Showers likely with a chance of thunderstorms.

$$

GMZ033-034-292030-
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-
424 AM EDT Sat Aug 29 2026

.TODAY...East winds near 10 knots, decreasing to 5 to 10 knots.
Seas around 1 foot. Wave Detail: East 1 foot at 3 seconds. A
chance of showers and thunderstorms.
.TONIGHT...Northeast to east winds near 10 knots, becoming east
to southeast and increasing to 10 to 15 knots. Seas 1 to 2 feet,
building to around 2 feet. Wave Detail: East to southeast 2 feet
at 4 seconds. Showers likely with a chance of thunderstorms.
.SUNDAY...East to southeast winds near 10 knots, decreasing to 5
to 10 knots. Seas 1 to 2 feet. Wave Detail: East to southeast 2
feet at 4 seconds. Showers likely with a chance of thunderstorms.
.SUNDAY NIGHT...Northeast to east winds near 10 knots, becoming
east to southeast and increasing to 10 to 15 knots. Seas 1 to 2
feet, building to around 2 feet. A chance of showers and
thunderstorms.
.MONDAY...East to southeast winds near 10 knots, becoming
northeast to east. Seas around 1 foot. A chance of showers and
thunderstorms.
.MONDAY NIGHT...Northeast to east winds 10 to 15 knots, becoming
east. Seas 1 to 2 feet. A chance of showers and thunderstorms.
.TUESDAY...East winds near 10 knots, becoming northeast to east
and decreasing to 5 to 10 knots. Seas 1 to 2 feet. Showers likely
with a chance of thunderstorms.
.TUESDAY NIGHT...East winds near 10 knots. Seas around 1 foot.
Showers and thunderstorms likely.
.WEDNESDAY...East winds 5 to 10 knots. Seas around 1 foot.
Showers and thunderstorms likely.
.WEDNESDAY NIGHT...East winds near 10 knots. Seas around 1 foot.
Thunderstorms likely. Showers likely.

$$

MJV