481
FZUS52 KKEY 020831
CWFKEY

Coastal Waters Forecast for the Florida Keys
National Weather Service Key West FL
431 AM EDT Sat Aug 2 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.

GMZ005-022045-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
431 AM EDT Sat Aug 2 2025

.SYNOPSIS...A weak Atlantic surface ridge will remain nosed over
South Florida for the next few days. This will promote generally
light east to southeasterly breezes. Shifts in this feature`s
exact position through the forecast period will result in bouts of
some days of fresher breezes than others. A weak tropical wave is
expected to encroach the Keys waters by the midweek resulting in a
period of more unsettled weather.

The Approximate Shoreward Edge of the Gulf Stream as of August 1...

60 NM South of Dry Tortugas Light...on Loggerhead Key.
11 NM South of Cosgrove Shoal Light...off the Marquesas Keys.
 3 NM South of Sand Key Light...off Key West.
 9 NM South of Looe Key...off Big Pine Key.
 7 NM Southeast of Sombrero Key Light...off Marathon.
 9 NM Southeast of Alligator Reef Light...off Islamorada.
 5 NM Southeast of Molasses Reef Light...off Key Largo.
 3 NM Southeast 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.

$$

GMZ031-022045-
Florida Bay including Barnes Sound, Blackwater Sound, and
Buttonwood Sound-
431 AM EDT Sat Aug 2 2025

.TODAY...Southeast winds 5 to 10 knots, decreasing to near 5
knots. Bay waters smooth to a light chop, becoming smooth.
Isolated showers and thunderstorms.
.TONIGHT...East to southeast winds 5 to 10 knots. Bay waters
smooth to a light chop. Isolated showers and thunderstorms.
.SUNDAY...East to southeast winds near 5 knots. Bay waters
smooth. Isolated showers and thunderstorms.
.SUNDAY NIGHT...East to southeast winds 5 to 10 knots, increasing
to near 10 knots. Bay waters smooth to a light chop, becoming a
light chop. Isolated showers and thunderstorms.
.MONDAY...Southeast winds 5 to 10 knots. Bay waters smooth to a
light chop. Scattered showers and isolated thunderstorms.
.MONDAY NIGHT...East to southeast winds near 10 knots. Bay waters
a light chop. Scattered showers and isolated thunderstorms.
.TUESDAY...East to southeast winds 5 to 10 knots. Bay waters
smooth to a light chop. Scattered showers and isolated
thunderstorms.
.TUESDAY NIGHT...Northeast to east winds 5 to 10 knots. Bay
waters smooth to a light chop. Scattered showers and isolated
thunderstorms.
.WEDNESDAY...East to southeast winds 5 to 10 knots. Bay waters
smooth to a light chop. Numerous showers and scattered
thunderstorms.
.WEDNESDAY NIGHT...East winds near 10 knots. Bay waters a light
chop. Scattered showers and isolated thunderstorms.

$$

GMZ032-035-022045-
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-
431 AM EDT Sat Aug 2 2025

.TODAY...East to southeast winds 5 to 10 knots, decreasing to near
5 knots. Seas 1 foot or less. Nearshore waters smooth to a light
chop, becoming smooth. Isolated showers and thunderstorms.
.TONIGHT...East to southeast winds 5 to 10 knots. Seas 1 foot or
less. Nearshore waters smooth to a light chop. Isolated showers
and thunderstorms.
.SUNDAY...East to southeast winds near 5 knots. Seas 1 foot or
less. Nearshore waters smooth. Isolated showers and
thunderstorms.
.SUNDAY NIGHT...East to southeast winds 5 to 10 knots. Seas
1 foot or less. Nearshore waters smooth to a light chop. Isolated
showers and thunderstorms.
.MONDAY...Southeast winds near 10 knots. Seas around 1 foot.
Nearshore waters a light chop. Scattered showers and isolated
thunderstorms.
.MONDAY NIGHT...East to southeast winds near 10 knots. Seas 1
foot. Nearshore waters a light chop. Scattered showers and
isolated thunderstorms.
.TUESDAY...East to southeast 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.
.TUESDAY NIGHT...Northeast to east winds near 10 knots. Seas
around 1 foot. Nearshore waters a light chop. Scattered showers
and isolated thunderstorms.
.WEDNESDAY...East winds 5 to 10 knots. Seas 1 foot or less.
Nearshore waters smooth to a light chop. Numerous showers and
scattered thunderstorms.
.WEDNESDAY NIGHT...East winds near 10 knots. Seas around 1 foot.
Nearshore waters a light chop. Scattered showers and isolated
thunderstorms.

$$

GMZ042>044-022045-
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-
431 AM EDT Sat Aug 2 2025

.TODAY...East to southeast winds 5 to 10 knots. Seas 1 to 2 feet,
subsiding to around 1 foot. Nearshore waters smooth to a light
chop. Isolated showers and thunderstorms.
.TONIGHT...East winds 5 to 10 knots. Seas around 1 foot.
Nearshore waters smooth to a light chop. Isolated showers and
thunderstorms.
.SUNDAY...East to southeast winds 5 to 10 knots. Seas around
1 foot. Nearshore waters smooth to a light chop. Isolated showers
and thunderstorms.
.SUNDAY NIGHT...East to southeast winds 5 to 10 knots, increasing
to near 10 knots. Seas around 1 foot, building to 1 to 2 feet.
Nearshore waters smooth to a light chop, becoming a light chop.
Isolated showers and thunderstorms.
.MONDAY...Southeast winds decreasing to 5 to 10 knots. Seas 1 to
2 feet. Nearshore waters becoming smooth to a light chop.
Isolated showers and thunderstorms.
.MONDAY NIGHT...East to southeast winds near 10 knots. Seas 1 to
2 feet. Nearshore waters a light chop. Scattered showers and
isolated thunderstorms.
.TUESDAY...East to southeast winds decreasing to 5 to 10 knots.
Seas 1 to 2 feet. Nearshore waters becoming smooth to a light
chop. Scattered showers and isolated thunderstorms.
.TUESDAY NIGHT...East winds near 10 knots. Seas 1 to 2 feet.
Nearshore waters a light chop. Scattered showers and isolated
thunderstorms.
.WEDNESDAY...East winds 5 to 10 knots. Seas around 1 foot.
Nearshore waters smooth to a light chop. Scattered showers and
thunderstorms.
.WEDNESDAY NIGHT...East winds near 10 knots. Seas 1 to 2 feet.
Nearshore waters a light chop. Scattered showers and isolated
thunderstorms.

$$

GMZ052>055-072>075-022045-
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-
431 AM EDT Sat Aug 2 2025

.TODAY...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. Isolated showers and thunderstorms.
.TONIGHT...East winds 5 to 10 knots. Seas 1 to 2 feet. Wave
Detail: East 1 foot at 4 seconds. Isolated showers and
thunderstorms.
.SUNDAY...East to southeast winds 5 to 10 knots. Seas 1 to 2 feet.
Wave Detail: East 1 foot at 4 seconds. Isolated showers and
thunderstorms.
.SUNDAY NIGHT...East to southeast winds near 10 knots. Seas 1 to
2 feet. Scattered showers and isolated thunderstorms.
.MONDAY...East to southeast winds near 10 knots. Seas 1 to 2
feet. Scattered showers and isolated thunderstorms.
.MONDAY NIGHT...East to southeast winds 10 to 15 knots. Seas 1 to
3 feet. Scattered showers and isolated thunderstorms.
.TUESDAY...East to southeast winds near 10 knots. Seas 1 to 2
feet. Scattered showers and isolated thunderstorms.
.TUESDAY NIGHT...East winds near 10 knots. Seas 1 to 2 feet.
Scattered showers and isolated thunderstorms.
.WEDNESDAY...East winds 5 to 10 knots. Seas 1 to 2 feet.
Scattered showers and thunderstorms.
.WEDNESDAY NIGHT...East winds near 10 knots. Seas 1 to 2 feet.
Scattered showers and isolated thunderstorms.

$$

GMZ033-034-022045-
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-
431 AM EDT Sat Aug 2 2025

.TODAY...East to southeast winds 5 to 10 knots. Seas 1 foot or
less. Wave Detail: East to southeast 1 foot at 3 seconds.
Isolated showers and thunderstorms.
.TONIGHT...Northeast to east winds near 5 knots. Seas 1 foot or
less. Isolated showers and thunderstorms.
.SUNDAY...Southeast winds near 5 knots. Seas 1 foot or less.
Isolated showers and thunderstorms.
.SUNDAY NIGHT...East to southeast winds near 5 knots, increasing
to 5 to 10 knots. Seas 1 foot or less. Isolated showers and
thunderstorms.
.MONDAY...Southeast winds near 10 knots, decreasing to near 5
knots. Seas around 1 foot. Isolated showers and thunderstorms.
.MONDAY NIGHT...East to southeast winds near 10 knots, becoming
southeast 10 to 15 knots. Seas 1 to 2 feet. Scattered showers and
isolated thunderstorms.
.TUESDAY...East to southeast winds decreasing to 5 to 10 knots.
Seas subsiding to around 1 foot. Scattered showers and isolated
thunderstorms.
.TUESDAY NIGHT...Northeast to east winds near 10 knots. Seas
around 1 foot. Scattered showers and isolated thunderstorms.
.WEDNESDAY...Northeast to east winds 5 to 10 knots. Seas 1 foot
or less. Scattered showers and thunderstorms.
.WEDNESDAY NIGHT...East winds near 10 knots. Seas around 1 foot.
Scattered showers and isolated thunderstorms.

$$

JAM