085
FZUS52 KKEY 101430
CWFKEY

Coastal Waters Forecast for the Florida Keys
National Weather Service Key West FL
1030 AM EDT Sun Aug 10 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.

GMZ005-110230-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
1030 AM EDT Sun Aug 10 2025

.SYNOPSIS...A tropical wave will continue slowly progressing
westward to northwest through the Keys today. This will promote
light to gentle east to southeast breezes as well as above normal
rain and thunder chances. Behind this feature, surface high
will build across the Atlantic and into the Keys. This will
result in gentle to moderate east to southeast breezes for early
next week. Breezes slacken back to light to gentle breezes towards
the middle of next week.

The Approximate Shoreward Edge of the Gulf Stream as of August 8...

84 NM South of Dry Tortugas Light...on Loggerhead Key.
53 NM South of Cosgrove Shoal Light...off the Marquesas Keys.
41 NM South of Sand Key Light...off Key West.
18 NM South of Looe Key...off Big Pine Key.
 9 NM Southeast of Sombrero Key Light...off Marathon.
 7 NM Southeast of Alligator Reef Light...off Islamorada.
 3 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.

$$

GMZ031-110230-
Florida Bay including Barnes Sound, Blackwater Sound, and
Buttonwood Sound-
1030 AM EDT Sun Aug 10 2025

.THIS AFTERNOON...Southeast to south winds near 10 knots,
becoming east to southeast near 5 knots. Bay waters a light chop,
becoming smooth. Scattered showers and thunderstorms.
.TONIGHT...East to southeast winds near 5 knots, increasing to
near 10 knots after midnight. Bay waters smooth, becoming a light
chop. Scattered showers and isolated thunderstorms.
.MONDAY...East to southeast winds near 10 knots. Bay waters a
light chop. Scattered showers and isolated thunderstorms.
.MONDAY NIGHT...East to southeast winds 10 to 15 knots. Bay
waters a light to moderate chop. Scattered showers and isolated
thunderstorms.
.TUESDAY...East to southeast winds decreasing to near 10 knots.
Bay waters becoming a light chop. Scattered showers and isolated
thunderstorms.
.TUESDAY NIGHT...East to southeast winds near 10 knots. Bay
waters a light chop. Scattered showers and isolated
thunderstorms.
.WEDNESDAY THROUGH THURSDAY...East to southeast winds near 10
knots. Bay waters a light chop. Scattered showers and isolated
thunderstorms.
.THURSDAY NIGHT...East winds near 10 knots. Bay waters a light
chop. Scattered showers and isolated thunderstorms.

$$

GMZ032-035-110230-
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-
1030 AM EDT Sun Aug 10 2025

.THIS AFTERNOON...Southeast to south winds near 10 knots,
decreasing to near 5 knots. Seas around 1 foot, subsiding to 1
foot or less. Nearshore waters a light chop, becoming smooth.
Scattered showers and thunderstorms.
.TONIGHT...East to southeast winds near 5 knots, increasing to
near 10 knots after midnight. Seas 1 foot or less, building to
around 1 foot late. Nearshore waters smooth, becoming a light
chop. Scattered showers and isolated thunderstorms.
.MONDAY...East to 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 10 to 15 knots. Seas
around 1 foot, except 1 to 2 feet west of the Marquesas Keys.
Nearshore waters a light to moderate chop. Scattered showers and
isolated thunderstorms.
.TUESDAY...East to southeast winds 10 to 15 knots, decreasing to
near 10 knots in the afternoon. Seas around 1 foot, except 1 to 2
feet west of the Marquesas Keys. Nearshore waters a light to
moderate chop, becoming a light chop. Scattered showers and
isolated thunderstorms.
.TUESDAY NIGHT...East to southeast winds near 10 knots. Seas
around 1 foot. Nearshore waters a light chop. Scattered showers
and isolated thunderstorms.
.WEDNESDAY AND WEDNESDAY NIGHT...East to southeast winds near 10
knots. Seas around 1 foot. Nearshore waters a light chop.
Scattered showers and isolated thunderstorms.
.THURSDAY...East to southeast winds 5 to 10 knots. Seas 1 foot or
less. Nearshore waters smooth to a light chop. Scattered showers
and isolated thunderstorms.
.THURSDAY NIGHT...East winds near 10 knots. Seas around 1 foot.
Nearshore waters a light chop. Scattered showers and isolated
thunderstorms.

$$

GMZ042>044-110230-
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-
1030 AM EDT Sun Aug 10 2025

.THIS AFTERNOON...Southeast to south winds near 10 knots,
decreasing to 5 to 10 knots. Seas around 1 foot. Nearshore waters
a light chop, becoming smooth to a light chop. Scattered showers
and thunderstorms.
.TONIGHT...East to southeast winds near 5 knots, increasing to
near 10 knots after midnight. Seas around 1 foot. Nearshore
waters smooth, becoming a light chop. Scattered showers and
isolated thunderstorms.
.MONDAY...East to southeast winds near 10 knots. Seas building to 1
to 2 feet. Nearshore waters a light chop. Scattered showers and
isolated thunderstorms.
.MONDAY NIGHT AND TUESDAY...East to southeast winds 10 to 15
knots. Seas around 2 feet. Nearshore waters a light to moderate
chop. Scattered showers and isolated thunderstorms.
.TUESDAY NIGHT...East to southeast winds near 10 knots. Seas 1 to
2 feet. Nearshore waters a light chop. Scattered showers and
isolated thunderstorms.
.WEDNESDAY THROUGH THURSDAY...East to southeast winds near 10
knots. Seas 1 to 2 feet. Nearshore waters a light chop. Scattered
showers and isolated thunderstorms.
.THURSDAY NIGHT...East winds near 10 knots. Seas 1 to 2 feet.
Nearshore waters a light chop. Scattered showers and isolated
thunderstorms.

$$

GMZ052>055-072>075-110230-
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-
1030 AM EDT Sun Aug 10 2025

.THIS AFTERNOON...Southeast to south winds near 10 knots,
becoming east to southeast 5 to 10 knots. Seas around 1 foot.
Wave Detail: Southeast 1 foot at 4 seconds. Scattered showers and
thunderstorms.
.TONIGHT...East to southeast winds 5 to 10 knots, increasing to
near 10 knots after midnight. Seas building to 1 to 2 feet. Wave
Detail: East 2 feet at 3 seconds. Scattered showers and isolated
thunderstorms.
.MONDAY...East to southeast winds 10 to 15 knots. Seas 1 to
2 feet, building to around 2 feet. Wave Detail: East 2 feet at 4
seconds. Scattered showers and isolated thunderstorms.
.MONDAY NIGHT...East to southeast winds 10 to 15 knots. Seas 2 to
3 feet. Scattered showers and isolated thunderstorms.
.TUESDAY...East to southeast winds 10 to 15 knots, decreasing to
near 10 knots in the afternoon. Seas 2 to 3 feet, subsiding to
around 2 feet. Scattered showers and isolated thunderstorms.
.TUESDAY NIGHT...East winds increasing to 10 to 15 knots. Seas
building to 2 to 3 feet. Scattered showers and isolated
thunderstorms.
.WEDNESDAY...East to southeast winds near 10 knots. Seas around 2
feet, subsiding to 1 to 2 feet. Scattered showers and isolated
thunderstorms.
.WEDNESDAY NIGHT...East to southeast winds 10 to 15 knots. Seas 1
to 3 feet. Scattered showers and isolated thunderstorms.
.THURSDAY...East winds near 10 knots. Seas 1 to 2 feet. Scattered
showers and isolated thunderstorms.
.THURSDAY NIGHT...East winds 10 to 15 knots. Seas building to 2
to 3 feet. Scattered showers and isolated thunderstorms.

$$

GMZ033-034-110230-
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-
1030 AM EDT Sun Aug 10 2025

.THIS AFTERNOON...South to southwest winds near 10 knots,
decreasing to 5 to 10 knots. Seas around 1 foot. Wave Detail:
South 1 foot at 3 seconds. Winds and seas higher in and around
numerous showers and scattered thunderstorms.
.TONIGHT...Southeast to south winds near 5 knots, becoming east
to southeast near 10 knots after midnight. Seas 1 foot or less,
building to around 1 foot. Wave Detail: South 1 foot at 4
seconds. Scattered showers and isolated thunderstorms.
.MONDAY...East to southeast winds near 10 knots, decreasing to 5
to 10 knots. Seas around 1 foot. Wave Detail: East to southeast 1
foot at 3 seconds and southwest 1 foot at 4 seconds. Scattered
showers and isolated thunderstorms.
.MONDAY NIGHT...East to southeast winds near 10 knots, increasing
to 10 to 15 knots. Seas building to 1 to 2 feet. Scattered
showers and isolated thunderstorms.
.TUESDAY...East to southeast winds 10 to 15 knots, decreasing to
near 10 knots. Seas around 2 feet, subsiding to 1 to 2 feet.
Scattered showers and isolated thunderstorms.
.TUESDAY NIGHT...East to southeast winds near 10 knots. Seas 1 to
2 feet. Isolated showers and thunderstorms.
.WEDNESDAY...East to southeast winds decreasing to 5 to 10 knots.
Seas around 1 foot. Scattered showers and isolated thunderstorms.
.WEDNESDAY NIGHT...East to southeast winds increasing to near 10
knots. Seas around 1 foot. Scattered showers and isolated
thunderstorms.
.THURSDAY...East to southeast winds decreasing to 5 to 10 knots.
Seas around 1 foot. Scattered showers and isolated thunderstorms.
.THURSDAY NIGHT...East winds increasing to near 10 knots. Seas
around 1 foot. Scattered showers and isolated thunderstorms.

$$