069
FZUS52 KKEY 132025
CWFKEY

Coastal Waters Forecast for the Florida Keys
National Weather Service Key West FL
425 PM EDT Wed Aug 13 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.

GMZ005-140830-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
425 PM EDT Wed Aug 13 2025

.SYNOPSIS...A broad ridge stretching across the North Atlantic
westward to the Florida Peninsula will result in light to
gentle east to southeast breezes for the rest of the week through
the weekend. Rain and thunder chances will be near to below normal
for this time of year, tending to peak in the late overnight and
early morning hours.

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.

$$

GMZ031-140830-
Florida Bay including Barnes Sound, Blackwater Sound, and
Buttonwood Sound-
425 PM EDT Wed Aug 13 2025

.TONIGHT...Southeast to south winds 5 to 10 knots, becoming east
to southeast. Bay waters smooth to a light chop. Isolated showers
and thunderstorms.
.THURSDAY...East winds 5 to 10 knots, becoming east to southeast
in the afternoon. Bay waters smooth to a light chop. Scattered
showers and isolated thunderstorms.
.THURSDAY NIGHT...East winds 5 to 10 knots. Bay waters smooth to
a light chop. Isolated showers and thunderstorms.
.FRIDAY...East winds near 10 knots. Bay waters a light chop.
Scattered showers and isolated thunderstorms.
.FRIDAY NIGHT...Northeast to east winds near 10 knots. Bay waters
a light chop. Scattered showers and isolated thunderstorms.
.SATURDAY...East winds near 10 knots. Bay waters a light chop.
Scattered showers and isolated thunderstorms.
.SATURDAY NIGHT...Northeast to east winds near 10 knots. Bay
waters a light chop. Scattered showers and isolated
thunderstorms.
.SUNDAY...East winds 5 to 10 knots, becoming southeast to south.
Bay waters smooth to a light chop. Scattered showers and isolated
thunderstorms.
.SUNDAY NIGHT...Southeast to south winds 5 to 10 knots. Bay
waters smooth to a light chop. Scattered showers and isolated
thunderstorms.
.MONDAY...Southeast to south winds 5 to 10 knots, becoming south
to southwest. Bay waters smooth to a light chop. Scattered
showers and isolated thunderstorms.
.MONDAY NIGHT...Southwest to west winds 5 to 10 knots. Bay waters
smooth to a light chop. Scattered showers and isolated
thunderstorms.

$$

GMZ032-035-140830-
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-
425 PM EDT Wed Aug 13 2025

.TONIGHT...Southeast to south winds 5 to 10 knots, becoming east
to southeast. Seas 1 foot or less. Nearshore waters smooth to a
light chop. Isolated showers and 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 5 to 10 knots. Seas building to
around 1 foot. Nearshore waters smooth to a light chop. Scattered
showers and isolated thunderstorms.
.FRIDAY...Northeast to east winds near 10 knots. Seas around 1
foot. Nearshore waters a light chop. Scattered showers and
isolated thunderstorms.
.FRIDAY NIGHT...East winds near 10 knots. Seas around 1 foot.
Nearshore waters a light chop. Scattered showers and isolated
thunderstorms.
.SATURDAY...East winds near 10 knots. Seas around 1 foot.
Nearshore waters a light chop. Scattered showers and isolated
thunderstorms.
.SATURDAY NIGHT...East winds near 10 knots. Seas around 1 foot.
Nearshore waters a light chop. Scattered showers and isolated
thunderstorms.
.SUNDAY...East to southeast winds 5 to 10 knots, becoming variable
near 5 knots. Seas subsiding to 1 foot or less. Nearshore waters
smooth to a light chop, becoming smooth. Scattered showers and
isolated thunderstorms.
.SUNDAY NIGHT...Variable winds near 5 knots, becoming southeast 5
to 10 knots. Seas 1 foot or less. Nearshore waters smooth,
becoming smooth to a light chop. Scattered showers and isolated
thunderstorms.
.MONDAY...Southeast to south winds 5 to 10 knots, becoming
southwest to west. Seas 1 foot or less. Nearshore waters smooth
to a light chop, becoming smooth. Scattered showers and isolated
thunderstorms.
.MONDAY NIGHT...Southwest to west winds 5 to 10 knots. Seas
1 foot or less. Nearshore waters smooth to a light chop.
Scattered showers and isolated thunderstorms.

$$

GMZ042>044-140830-
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-
425 PM EDT Wed Aug 13 2025

.TONIGHT...Southeast to south winds 5 to 10 knots, becoming east
to southeast. Seas around 1 foot. Nearshore waters smooth to a
light chop. Isolated showers and thunderstorms.
.THURSDAY...East to southeast winds 5 to 10 knots. Seas around 1
foot. Nearshore waters smooth to a light chop. Scattered showers
and isolated thunderstorms.
.THURSDAY NIGHT...East winds 5 to 10 knots. Seas around 1 foot.
Nearshore waters smooth to a light chop. Isolated showers and
thunderstorms.
.FRIDAY...Northeast to east winds near 10 knots. Seas building to
1 to 2 feet. Nearshore waters a light chop. Scattered showers and
isolated thunderstorms.
.FRIDAY NIGHT...Northeast to east winds near 10 knots. Seas 1 to
2 feet. Nearshore waters a light chop. Scattered showers and
isolated thunderstorms.
.SATURDAY...East winds near 10 knots. Seas 1 to 2 feet. Nearshore
waters a light chop. Scattered showers and isolated
thunderstorms.
.SATURDAY NIGHT...Northeast to east winds near 10 knots. Seas
1 to 2 feet. Nearshore waters a light chop. Scattered showers and
isolated thunderstorms.
.SUNDAY...East winds 5 to 10 knots, becoming variable near 5 knots.
Seas around 1 foot. Nearshore waters smooth to a light chop,
becoming smooth. Scattered showers and isolated thunderstorms.
.SUNDAY NIGHT...Variable winds near 5 knots, becoming east to
southeast 5 to 10 knots. Seas around 1 foot. Nearshore waters
smooth, becoming smooth to a light chop. Scattered showers and
isolated thunderstorms.
.MONDAY...Southeast to south winds 5 to 10 knots, becoming
south to southwest. Seas around 1 foot. Nearshore waters smooth
to a light chop. Scattered showers and isolated thunderstorms.
.MONDAY NIGHT...Southwest to west winds 5 to 10 knots. Seas
around 1 foot. Nearshore waters smooth to a light chop. Scattered
showers and isolated thunderstorms.

$$

GMZ052>055-072>075-140830-
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-
425 PM EDT Wed Aug 13 2025

.TONIGHT...Southeast winds 5 to 10 knots, becoming east to
southeast. Seas 1 to 2 feet. Wave Detail: East 2 feet at 4
seconds. Isolated showers and thunderstorms.
.THURSDAY...East winds 5 to 10 knots. Seas around 1 foot. Wave
Detail: East 1 foot at 4 seconds. Scattered showers and isolated
thunderstorms.
.THURSDAY NIGHT...Northeast to east winds near 10 knots. Seas 1
to 2 feet. Isolated showers and thunderstorms.
.FRIDAY...Northeast to east winds near 10 knots. Seas 1 to 2
feet. Scattered showers and isolated thunderstorms.
.FRIDAY NIGHT...Northeast to east winds 10 to 15 knots. Seas
around 2 feet. Scattered showers and isolated thunderstorms.
.SATURDAY...Northeast to east winds near 10 knots. Seas around
2 feet. Scattered showers and isolated thunderstorms.
.SATURDAY NIGHT...Northeast to east winds near 10 knots. Seas
1 to 2 feet. Scattered showers and isolated thunderstorms.
.SUNDAY...East to southeast winds 5 to 10 knots, becoming variable.
Seas 1 to 2 feet, subsiding to around 1 foot. Scattered showers
and isolated thunderstorms.
.SUNDAY NIGHT...Winds becoming east to southeast 5 to 10 knots.
Seas around 1 foot. Scattered showers and isolated thunderstorms.
.MONDAY...Southeast winds 5 to 10 knots, becoming variable. Seas
around 1 foot. Scattered showers and isolated thunderstorms.
.MONDAY NIGHT...Variable winds 5 to 10 knots, becoming south to
southwest. Seas around 1 foot. Scattered showers and isolated
thunderstorms.

$$

GMZ033-034-140830-
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-
425 PM EDT Wed Aug 13 2025

.TONIGHT...Southeast winds 5 to 10 knots. Seas around 1 foot.
Wave Detail: Southeast 1 foot at 3 seconds. Isolated showers and
thunderstorms.
.THURSDAY...East to southeast winds 5 to 10 knots, briefly
decreasing to near 5 knots in the afternoon. Seas subsiding to 1
foot or less. Wave Detail: East to southeast 1 foot at 3 seconds.
Scattered showers and isolated thunderstorms.
.THURSDAY NIGHT...East winds increasing to 5 to 10 knots. Seas
building to around 1 foot. Scattered showers and isolated
thunderstorms.
.FRIDAY...East winds 5 to 10 knots. Seas around 1 foot. Scattered
showers and isolated thunderstorms.
.FRIDAY NIGHT...East winds 5 to 10 knots. Seas around 1 foot.
Scattered showers and isolated thunderstorms.
.SATURDAY...East winds 5 to 10 knots. Seas around 1 foot.
Scattered showers and isolated thunderstorms.
.SATURDAY NIGHT...East winds 5 to 10 knots. Seas around 1 foot.
Scattered showers and isolated thunderstorms.
.SUNDAY...East winds 5 to 10 knots, becoming variable near 5 knots.
Seas around 1 foot. Scattered showers and isolated thunderstorms.
.SUNDAY NIGHT...Variable winds near 5 knots, becoming east to
southeast 5 to 10 knots. Seas around 1 foot. Scattered showers
and isolated thunderstorms.
.MONDAY...Southeast to south winds 5 to 10 knots, becoming southwest.
Seas around 1 foot. Scattered showers and isolated thunderstorms.
.MONDAY NIGHT...West winds 5 to 10 knots. Seas around 1 foot.
Scattered showers and isolated thunderstorms.

$$