774
FZUS52 KKEY 090218
CWFKEY

Coastal Waters Forecast for the Florida Keys
National Weather Service Key West FL
1018 PM EDT Fri Aug 8 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.

GMZ005-091430-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
1018 PM EDT Fri Aug 8 2025

.SYNOPSIS...A tropical wave will continue slowly progressing
westward through the Keys overnight through Saturday. This will
promote light to gentle east to southeast breezes (occasionally
light to moderate breezes) as well as above normal rain and
thunder chances. As the wave continues progressing further into
the Gulf heading through the weekend, surface high pressure across
the Atlantic will slowly build into the Keys. This will result in
gentle to moderate east to southeast breezes for early 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.

$$

GMZ031-091430-
Florida Bay including Barnes Sound, Blackwater Sound, and
Buttonwood Sound-
1018 PM EDT Fri Aug 8 2025

.OVERNIGHT...East to southeast winds 5 to 10 knots, increasing to
10 to 15 knots. Bay waters smooth to a light chop, becoming a
light to moderate chop. Numerous showers and scattered
thunderstorms.
.SATURDAY...Southeast winds near 10 knots. Bay waters a light
chop. Numerous showers and scattered thunderstorms.
.SATURDAY NIGHT...Southeast winds near 10 knots. Bay waters a
light chop. Scattered showers and thunderstorms.
.SUNDAY...Southeast winds 5 to 10 knots. Bay waters smooth to a
light chop. Numerous showers and scattered thunderstorms.
.SUNDAY NIGHT...East to southeast winds 5 to 10 knots, increasing
to 10 to 15 knots after midnight. Bay waters smooth to a light
chop, becoming a light to moderate chop. Scattered showers and
isolated thunderstorms.
.MONDAY...East to southeast winds 10 to 15 knots, decreasing to
near 10 knots. Bay waters a light to moderate chop, becoming a
light chop. Scattered showers and isolated thunderstorms.
.MONDAY NIGHT...East winds 10 to 15 knots, becoming east to
southeast. Bay waters a light to moderate chop. Scattered showers
and isolated thunderstorms.
.TUESDAY AND TUESDAY NIGHT...East winds near 10 knots. Bay waters
a light chop. Scattered showers and isolated thunderstorms.
.WEDNESDAY AND WEDNESDAY NIGHT...East winds near 10 knots. Bay
waters a light chop. Scattered showers and isolated
thunderstorms.

$$

GMZ032-035-091430-
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-
1018 PM EDT Fri Aug 8 2025

.OVERNIGHT...East to southeast winds near 10 knots, increasing to
10 to 15 knots. Seas 1 foot or less, building to around 1 foot,
except building to 1 to 2 feet west of the Marquesas Keys.
Nearshore waters a light chop, becoming a light to moderate chop.
Numerous showers and scattered thunderstorms.
.SATURDAY...Southeast winds 10 to 15 knots, becoming southeast to
south and decreasing to 5 to 10 knots. Seas around 1 foot,
subsiding to 1 foot or less. West of the Marquesas Keys, seas 1 to
2 feet, subsiding to around 1 foot. Nearshore waters a light to
moderate chop, becoming smooth to a light chop. Numerous showers
and scattered thunderstorms.
.SATURDAY NIGHT...Southeast winds 5 to 10 knots, increasing to
near 10 knots. Seas around 1 foot. Nearshore waters smooth to a
light chop, becoming a light chop. Scattered showers and
thunderstorms.
.SUNDAY...Southeast 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. Numerous showers and scattered
thunderstorms.
.SUNDAY NIGHT...East to southeast winds 5 to 10 knots, increasing
to 10 to 15 knots after midnight. Seas around 1 foot. Nearshore
waters smooth to a light chop, becoming a light to moderate chop.
Scattered showers and isolated thunderstorms.
.MONDAY...East to southeast winds 10 to 15 knots, decreasing to
near 10 knots. 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.
.MONDAY NIGHT...East to southeast winds 10 to 15 knots. Seas
1 to 2 feet. Nearshore waters a light to moderate chop. Scattered
showers and isolated thunderstorms.
.TUESDAY...East to southeast winds near 10 knots. Seas around 1
foot, except 1 to 2 feet west of the Marquesas Keys. Nearshore
waters a light chop. Scattered showers and isolated thunderstorms.
.TUESDAY NIGHT...East winds near 10 knots. Seas around 1 foot,
except 1 to 2 feet west of the Marquesas Keys. 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.

$$

GMZ042>044-091430-
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-
1018 PM EDT Fri Aug 8 2025

.OVERNIGHT...East to southeast winds near 10 knots, increasing to
10 to 15 knots. Seas 1 to 2 feet, building to around 2 feet.
Nearshore waters a light chop, becoming a light to moderate chop.
Numerous showers and scattered thunderstorms.
.SATURDAY...Southeast to south winds 10 to 15 knots, becoming
southeast and decreasing to 5 to 10 knots. Seas around 2 feet,
subsiding to 1 to 2 feet. Nearshore waters a light to moderate
chop, becoming smooth to a light chop. Numerous showers and
scattered thunderstorms.
.SATURDAY NIGHT...Southeast winds near 10 knots. Seas 1 to 2
feet. Nearshore waters a light chop. Scattered showers and
thunderstorms.
.SUNDAY...Southeast winds near 10 knots, becoming east to
southeast and 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. Scattered showers and
thunderstorms.
.SUNDAY NIGHT...East to southeast winds 5 to 10 knots, increasing
to 10 to 15 knots after midnight. Seas around 1 foot, building to
1 to 2 feet. Nearshore waters smooth to a light chop, becoming a
light to moderate chop. Scattered showers and isolated
thunderstorms.
.MONDAY...East to southeast winds 10 to 15 knots, decreasing to
near 10 knots. Seas around 2 feet, subsiding to 1 to 2 feet.
Nearshore waters a light to moderate chop, becoming a light chop.
Scattered showers and isolated thunderstorms.
.MONDAY NIGHT...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...East to southeast winds near 10 knots. Seas 1 to
2 feet. Nearshore waters 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 AND WEDNESDAY NIGHT...East to southeast winds near 10
knots. Seas 1 to 2 feet. Nearshore waters a light chop. Scattered
showers and isolated thunderstorms.

$$

GMZ052>055-072>075-091430-
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-
1018 PM EDT Fri Aug 8 2025

.OVERNIGHT...Southeast winds 10 to 15 knots. Seas 1 to 2 feet.
Wave Detail: East to southeast 1 foot at 4 seconds. Numerous
showers and scattered thunderstorms.
.SATURDAY...Southeast to south winds 10 to 15 knots, becoming
southeast and decreasing to 5 to 10 knots. Seas 1 to 2 feet. Wave
Detail: East to southeast 1 foot at 4 seconds. Numerous showers
and scattered thunderstorms.
.SATURDAY NIGHT...Southeast winds 5 to 10 knots, increasing to
near 10 knots. Seas 1 to 2 feet. Wave Detail: East to southeast 1
foot at 4 seconds. Scattered showers and thunderstorms.
.SUNDAY...Southeast winds near 10 knots, becoming east to
southeast and decreasing to 5 to 10 knots. Seas 1 to 2 feet.
Scattered showers and thunderstorms.
.SUNDAY NIGHT...East winds 5 to 10 knots, becoming east to
southeast and increasing to 10 to 15 knots after midnight. Seas 1
to 2 feet, building to around 2 feet. Scattered showers and
isolated thunderstorms.
.MONDAY...East to southeast winds 10 to 15 knots, becoming east
and decreasing to near 10 knots. Seas 2 to 3 feet. Scattered
showers and isolated thunderstorms.
.MONDAY NIGHT...East winds 10 to 15 knots, becoming east to
southeast. Seas 2 to 3 feet. Scattered showers and isolated
thunderstorms.
.TUESDAY...East to southeast winds near 10 knots. Seas around 2
feet. Scattered showers and isolated thunderstorms.
.TUESDAY NIGHT...East winds near 10 knots. Seas around 2 feet.
Scattered showers and isolated thunderstorms.
.WEDNESDAY AND WEDNESDAY NIGHT...East to southeast winds near 10
knots. Seas around 2 feet. Scattered showers and isolated
thunderstorms.

$$

GMZ033-034-091430-
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-
1018 PM EDT Fri Aug 8 2025

.OVERNIGHT...East to southeast winds 5 to 10 knots, increasing to
10 to 15 knots. Seas around 1 foot, building to 1 to 2 feet. Wave
Detail: East to southeast 1 foot at 3 seconds. Numerous showers
and scattered thunderstorms.
.SATURDAY...Southeast to south winds near 10 knots, decreasing to 5
to 10 knots. Seas 1 to 2 feet, subsiding to around 1 foot. Wave
Detail: Southeast 1 foot at 3 seconds. Numerous showers and
scattered thunderstorms.
.SATURDAY NIGHT...Southeast to south winds 5 to 10 knots,
increasing to near 10 knots. Seas around 1 foot. Wave Detail:
Southeast 1 foot at 3 seconds. Numerous showers and scattered
thunderstorms.
.SUNDAY...Southeast to south winds near 10 knots, decreasing to 5
to 10 knots. Seas around 1 foot. Numerous showers and scattered
thunderstorms.
.SUNDAY NIGHT...Southeast winds 5 to 10 knots, becoming east to
southeast and increasing to 10 to 15 knots after midnight. Seas
around 1 foot, building to around 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
around 2 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 AND WEDNESDAY NIGHT...East to southeast winds near 10
knots. Seas 1 to 2 feet. Scattered showers and isolated
thunderstorms.

$$