735
FZUS52 KKEY 032020
CWFKEY

Coastal Waters Forecast for the Florida Keys
National Weather Service Key West FL
420 PM 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.

GMZ005-040830-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
420 PM 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.

$$

GMZ031-040830-
Florida Bay including Barnes Sound, Blackwater Sound, and
Buttonwood Sound-
420 PM EDT Thu Jul 3 2025

.TONIGHT...Southwest to west winds near 5 knots, becoming south
after midnight. Bay waters 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.
.TUESDAY...East winds 5 to 10 knots. Bay waters smooth to a light
chop. Scattered showers and isolated thunderstorms.
.TUESDAY NIGHT...East winds near 5 knots. Bay waters smooth.
Isolated showers and thunderstorms.

$$

GMZ032-035-040830-
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-
420 PM EDT Thu Jul 3 2025

.TONIGHT...West winds near 5 knots, becoming south after
midnight. Seas 1 foot or less. Nearshore waters 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 THROUGH SATURDAY NIGHT...Southwest winds near 10
knots. Seas around 1 foot. Nearshore waters a light chop.
Scattered showers and 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.
.TUESDAY...East winds 5 to 10 knots. Seas 1 foot or less.
Nearshore waters smooth to a light chop. Scattered showers and
isolated thunderstorms.
.TUESDAY NIGHT...East winds near 5 knots. Seas 1 foot or less.
Nearshore waters smooth. Isolated showers and thunderstorms.

$$

GMZ042>044-040830-
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-
420 PM EDT Thu Jul 3 2025

.TONIGHT...Southwest to west winds near 5 knots, becoming south
after midnight. Seas around 1 foot. Nearshore waters 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.
.TUESDAY...East winds 5 to 10 knots. Seas 1 foot or less.
Nearshore waters smooth to a light chop. Scattered showers and
isolated thunderstorms.
.TUESDAY NIGHT...East winds 5 to 10 knots. Seas 1 foot or less.
Nearshore waters smooth to a light chop. Isolated showers and
thunderstorms.

$$

GMZ052>055-072>075-040830-
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-
420 PM EDT Thu Jul 3 2025

.TONIGHT...Variable winds near 5 knots, becoming southeast to
south late this evening and overnight. 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 1 to 2 feet. Wave
Detail: Northwest 1 foot at 3 seconds and east 1 foot at 4
seconds. 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 AND 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.
.TUESDAY...Northeast to east winds 5 to 10 knots. Seas 1 to
2 feet. Scattered showers and isolated thunderstorms.
.TUESDAY NIGHT...East winds near 10 knots. Seas 1 to 2 feet.
Isolated showers and thunderstorms.

$$

GMZ033-034-040830-
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-
420 PM EDT Thu Jul 3 2025

.TONIGHT...West winds near 5 knots, becoming southwest after
midnight. 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
building to 1 to 2 feet. Wave Detail: West 1 foot at 5 seconds.
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.
.TUESDAY...Northeast to east winds 5 to 10 knots. Seas around
1 foot. Scattered showers and isolated thunderstorms.
.TUESDAY NIGHT...Northeast to east winds near 5 knots. Seas
around 1 foot. Isolated showers and thunderstorms.

$$

CLR