621
FZUS52 KKEY 031431
CWFKEY

Coastal Waters Forecast for the Florida Keys
National Weather Service Key West FL
1031 AM EDT Thu Jul 3 2025

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.

Wave Detail will include details about the period and direction
of origin for the highest energy waves. Long-period swells coming
from a different direction than the wind would be included in the
Wave Detail.

GMZ005-040245-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
1031 AM EDT Thu Jul 3 2025

.SYNOPSIS...Broad low-level ridging will continue to rebuild over
the North Atlantic. This will initially support light to gentle
southeast to south breezes across Florida Keys coastal waters and
gradually clock around to the southwest and west as trough of low
pressure approaches the region from the north. Rain chances will
increase by Friday and remain elevated through Saturday evening as
a result. As the trough exits the region and lifts northeast starting
Sunday, a weak ridge axis will lie across the Florida Keys,
resulting in generally light to gentle easterly breezes.


The Approximate Shoreward Edge of the Gulf Stream as of June 29...

14 NM Southwest of Dry Tortugas Light...on Loggerhead Key.
15 NM South of Cosgrove Shoal Light...off the Marquesas Keys.
18 NM South of Sand Key Light...off Key West.
26 NM South of Looe Key...off Big Pine Key.
31 NM South of Sombrero Key Light...off Marathon.
18 NM Southeast of Alligator Reef Light...off Islamorada.
 9 NM Southeast of Molasses Reef Light...off Key Largo.
 3 NM East of Carysfort Reef Light...off Ocean Reef.

Gulf Stream Information Courtesy of the National Weather Service in
Key West based on products from NASA SPoRT.

$$

GMZ031-040245-
Florida Bay including Barnes Sound, Blackwater Sound, and
Buttonwood Sound-
1031 AM EDT Thu Jul 3 2025

.THIS AFTERNOON...Southwest winds near 10 knots, becoming
southwest to west near 5 knots. Bay waters a light chop, becoming
smooth. Scattered showers and isolated thunderstorms.
.TONIGHT...Southwest to west winds near 5 knots, becoming south 5
to 10 knots after midnight. Bay waters smooth, becoming smooth to
a light chop. Scattered showers and isolated thunderstorms.
.FRIDAY...Southwest winds 5 to 10 knots. Bay waters smooth to a
light chop. Scattered showers and thunderstorms.
.FRIDAY NIGHT...Southwest winds increasing to near 10 knots. Bay
waters becoming a light chop. Scattered showers and
thunderstorms.
.SATURDAY...Southwest winds near 10 knots. Bay waters a light
chop. Scattered showers and thunderstorms.
.SATURDAY NIGHT...Southwest winds near 10 knots. Bay waters a
light chop. Scattered showers and isolated thunderstorms.
.SUNDAY...South to southwest winds decreasing to 5 to 10 knots.
Bay waters becoming smooth to a light chop. Scattered showers and
isolated thunderstorms.
.SUNDAY NIGHT...South to southwest winds 5 to 10 knots, becoming
southeast to south. Bay waters smooth to a light chop. Isolated
showers and thunderstorms.
.MONDAY...Southeast to south winds near 5 knots. Bay waters
smooth. Scattered showers and isolated thunderstorms.
.MONDAY NIGHT...East to southeast winds near 5 knots. Bay waters
smooth. Isolated showers and thunderstorms.

$$

GMZ032-035-040245-
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-
1031 AM EDT Thu Jul 3 2025

.THIS AFTERNOON...Southwest winds near 10 knots, becoming
southwest to west near 5 knots. Seas around 1 foot, subsiding to 1
foot or less. Nearshore waters a light chop, becoming smooth.
Scattered showers and isolated thunderstorms.
.TONIGHT...West winds near 5 knots, becoming south to southwest 5
to 10 knots after midnight. Seas 1 foot or less. Nearshore waters
smooth, becoming smooth to a light chop. Scattered showers and
isolated thunderstorms.
.FRIDAY...Southwest winds increasing to near 10 knots. Seas around
1 foot. Nearshore waters becoming a light chop. Scattered showers
and thunderstorms.
.FRIDAY NIGHT...Southwest winds near 10 knots. Seas around 1
foot. Nearshore waters a light chop. Scattered showers and
thunderstorms.
.SATURDAY...Southwest winds near 10 knots. Seas around 1 foot.
Nearshore waters a light chop. Scattered showers and
thunderstorms.
.SATURDAY NIGHT...Southwest winds near 10 knots. Seas around 1
foot. Nearshore waters a light chop. Scattered showers and
isolated thunderstorms.
.SUNDAY...South to southwest winds decreasing to 5 to 10 knots.
Seas subsiding to 1 foot or less. Nearshore waters becoming
smooth to a light chop. Scattered showers and isolated
thunderstorms.
.SUNDAY NIGHT...South to southwest winds near 5 knots, becoming
southeast to south. Seas less than 1 foot. Nearshore waters
smooth. Isolated showers and thunderstorms.
.MONDAY...Southeast winds near 5 knots, becoming east to southeast.
Seas less than 1 foot. Nearshore waters smooth. Isolated showers
and thunderstorms.
.MONDAY NIGHT...East winds 5 to 10 knots. Seas 1 foot or less.
Nearshore waters smooth to a light chop. Isolated showers and
thunderstorms.

$$

GMZ042-043-040245-
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-
1031 AM EDT Thu Jul 3 2025

.THIS AFTERNOON...South to southwest winds 10 to 15 knots,
decreasing to near 10 knots. Seas around 2 feet, subsiding to
around 1 foot. Nearshore waters a light to moderate chop,
becoming a light chop. Scattered showers and isolated
thunderstorms.
.TONIGHT...Southwest to west winds near 5 knots, becoming south 5
to 10 knots after midnight. Seas around 1 foot. Nearshore waters
smooth, becoming smooth to a light chop. Isolated showers and
thunderstorms.
.FRIDAY...Southwest winds 5 to 10 knots. Seas around 1 foot.
Nearshore waters smooth to a light chop. Scattered showers and
thunderstorms.
.FRIDAY NIGHT...Southwest winds increasing to near 10 knots. Seas
around 1 foot. Nearshore waters becoming a light chop. Scattered
showers and thunderstorms.
.SATURDAY...Southwest winds near 10 knots. Seas around 1 foot.
Nearshore waters a light chop. Scattered showers and
thunderstorms.
.SATURDAY NIGHT...Southwest winds near 10 knots. Seas around 1
foot. Nearshore waters a light chop. Scattered showers and
isolated thunderstorms.
.SUNDAY...South to southwest winds decreasing to 5 to 10 knots.
Seas 1 foot or less. Nearshore waters becoming smooth to a light
chop. Scattered showers and isolated thunderstorms.
.SUNDAY NIGHT...Southeast to south winds near 5 knots. Seas
1 foot or less. Nearshore waters smooth. Isolated showers and
thunderstorms.
.MONDAY...East to southeast winds near 5 knots. Seas 1 foot or
less. Nearshore waters smooth. Isolated showers and
thunderstorms.
.MONDAY NIGHT...East winds 5 to 10 knots. Seas around 1 foot.
Nearshore waters smooth to a light chop. Isolated showers and
thunderstorms.

$$

GMZ044-040245-
Hawk Channel from west end of Seven Mile Bridge to Halfmoon Shoal
out to the reef-
1031 AM EDT Thu Jul 3 2025

.THIS AFTERNOON...Southeast to south near 5 knots, becoming
southwest to west. Seas 1 to 2 feet, subsiding to around 1 foot.
Nearshore waters smooth. Scattered showers and isolated
thunderstorms.
.TONIGHT...Southwest to west winds near 5 knots, becoming south 5
to 10 knots after midnight. Seas around 1 foot. Nearshore waters
smooth, becoming smooth to a light chop. Isolated showers and
thunderstorms.
.FRIDAY...Southwest winds 5 to 10 knots. Seas around 1 foot.
Nearshore waters smooth to a light chop. Scattered showers and
thunderstorms.
.FRIDAY NIGHT...Southwest winds increasing to near 10 knots. Seas
around 1 foot. Nearshore waters becoming a light chop. Scattered
showers and thunderstorms.
.SATURDAY...Southwest winds near 10 knots. Seas around 1 foot.
Nearshore waters a light chop. Scattered showers and
thunderstorms.
.SATURDAY NIGHT...Southwest winds near 10 knots. Seas around 1
foot. Nearshore waters a light chop. Scattered showers and
isolated thunderstorms.
.SUNDAY...South to southwest winds decreasing to 5 to 10 knots.
Seas 1 foot or less. Nearshore waters becoming smooth to a light
chop. Scattered showers and isolated thunderstorms.
.SUNDAY NIGHT...Southeast to south winds near 5 knots. Seas
1 foot or less. Nearshore waters smooth. Isolated showers and
thunderstorms.
.MONDAY...East to southeast winds near 5 knots. Seas 1 foot or
less. Nearshore waters smooth. Isolated showers and
thunderstorms.
.MONDAY NIGHT...East winds 5 to 10 knots. Seas around 1 foot.
Nearshore waters smooth to a light chop. Isolated showers and
thunderstorms.

$$

GMZ052-053-072-073-040245-
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 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-
1031 AM EDT Thu Jul 3 2025

.THIS AFTERNOON...South to southwest winds 10 to 15 knots,
decreasing to near 10 knots. Seas 2 to 3 feet, subsiding to
around 2 feet. Wave Detail: Southeast 2 feet at 4 seconds.
Isolated showers and thunderstorms.
.TONIGHT...Variable winds near 5 knots, becoming southeast to
south 5 to 10 knots after midnight. Seas around 1 foot. Wave
Detail: East to southeast 1 foot at 4 seconds. Isolated showers
and thunderstorms.
.FRIDAY...South to southwest winds 5 to 10 knots, becoming
southwest to west. Seas around 1 foot. Wave Detail: East to
southeast 1 foot at 4 seconds. Scattered showers and
thunderstorms.
.FRIDAY NIGHT...Southwest to west winds 5 to 10 knots, becoming
south to southwest near 10 knots. Seas building to 1 to 2 feet.
Scattered showers and thunderstorms.
.SATURDAY...Southwest winds near 10 knots. Seas 1 to 2 feet.
Scattered showers and thunderstorms.
.SATURDAY NIGHT...Southwest to west winds 5 to 10 knots, becoming
south to southwest after midnight. Seas subsiding to around 1
foot. Scattered showers and isolated thunderstorms.
.SUNDAY...South to southwest winds 5 to 10 knots, becoming
southeast to south. Seas around 1 foot. Isolated showers and
thunderstorms.
.SUNDAY NIGHT...East to southeast winds 5 to 10 knots. Seas
1 foot or less. Isolated showers and thunderstorms.
.MONDAY...East to southeast winds 5 to 10 knots. Seas around
1 foot. Isolated showers and thunderstorms.
.MONDAY NIGHT...East winds near 10 knots. Seas 1 to 2 feet.
Isolated showers and thunderstorms.

$$

GMZ054-055-074-075-040245-
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 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-
1031 AM EDT Thu Jul 3 2025

.THIS AFTERNOON...Variable winds 5 to 10 knots. Seas around 2
feet, subsiding to 1 to 2 feet. Wave Detail: Southeast 2 feet at 4
seconds. Isolated showers and thunderstorms.
.TONIGHT...Variable winds near 5 knots, becoming southeast to
south 5 to 10 knots after midnight. Seas around 1 foot. Wave
Detail: East to southeast 1 foot at 4 seconds. Isolated showers
and thunderstorms.
.FRIDAY...South to southwest winds 5 to 10 knots, becoming
southwest to west. Seas around 1 foot. Wave Detail: East to
southeast 1 foot at 4 seconds. Scattered showers and
thunderstorms.
.FRIDAY NIGHT...Southwest to west winds 5 to 10 knots, becoming
south to southwest near 10 knots. Seas building to 1 to 2 feet.
Scattered showers and thunderstorms.
.SATURDAY...Southwest winds near 10 knots. Seas 1 to 2 feet.
Scattered showers and thunderstorms.
.SATURDAY NIGHT...Southwest to west winds 5 to 10 knots, becoming
south to southwest after midnight. Seas subsiding to around 1
foot. Scattered showers and isolated thunderstorms.
.SUNDAY...South to southwest winds 5 to 10 knots, becoming
southeast to south. Seas around 1 foot. Isolated showers and
thunderstorms.
.SUNDAY NIGHT...East to southeast winds 5 to 10 knots. Seas
1 foot or less. Isolated showers and thunderstorms.
.MONDAY...East to southeast winds 5 to 10 knots. Seas around
1 foot. Isolated showers and thunderstorms.
.MONDAY NIGHT...East winds near 10 knots. Seas 1 to 2 feet.
Isolated showers and thunderstorms.

$$

GMZ033-034-040245-
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-
1031 AM EDT Thu Jul 3 2025

.THIS AFTERNOON...Southwest to west winds near 10 knots, becoming
west 5 to 10 knots in the afternoon. Seas 1 to 2 feet, subsiding
to around 1 foot. Wave Detail: South 1 foot at 3 seconds and
northwest 1 foot at 5 seconds. Winds and seas higher near
scattered showers and thunderstorms.
.TONIGHT...Southwest to west winds 5 to 10 knots. Seas around
1 foot. Wave Detail: Southwest 1 foot at 4 seconds. Scattered
showers and thunderstorms.
.FRIDAY...Southwest to west winds near 10 knots. Seas building to
1 to 2 feet. Wave Detail: West 1 foot at 5 seconds. Numerous
showers and scattered thunderstorms.
.FRIDAY NIGHT...Southwest to west winds near 10 knots. Seas
1 to 2 feet. Scattered showers and thunderstorms.
.SATURDAY...Southwest winds near 10 knots. Seas 1 to 2 feet.
Numerous showers and scattered thunderstorms.
.SATURDAY NIGHT...Southwest winds near 10 knots. Seas 1 to 2 feet.
Isolated showers and thunderstorms.
.SUNDAY...Southwest winds decreasing to 5 to 10 knots. Seas
around 1 foot. Scattered showers and isolated thunderstorms.
.SUNDAY NIGHT...Southwest winds near 5 knots, becoming southeast
to south. Seas around 1 foot. Isolated showers and thunderstorms.
.MONDAY...Southeast to south winds near 5 knots, becoming east to
southeast. Seas around 1 foot. Isolated showers and
thunderstorms.
.MONDAY NIGHT...Northeast to east winds increasing to 5 to 10
knots. Seas around 1 foot. Isolated showers and thunderstorms.

$$

CLR