219
FZUS52 KKEY 231432
CWFKEY

Coastal Waters Forecast for the Florida Keys
National Weather Service Key West FL
1032 AM EDT Sat Aug 23 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.

GMZ005-240245-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
1032 AM EDT Sat Aug 23 2025

.SYNOPSIS...A weak subtropical high pressure ridge will remain
over the Keys through early next week. This will result in
generally light breezes, occasionally becoming light to gentle as
well as variable at times.

The Approximate Shoreward Edge of the Gulf Stream as of August 21...

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

$$

GMZ031-240245-
Florida Bay including Barnes Sound, Blackwater Sound, and
Buttonwood Sound-
1032 AM EDT Sat Aug 23 2025

.THIS AFTERNOON...Variable winds near 5 knots, becoming southwest
to west. Bay waters smooth. Scattered showers and isolated
thunderstorms.
.TONIGHT...Southwest to west winds near 5 knots, becoming south
after midnight. Bay waters smooth. Isolated showers and
thunderstorms.
.SUNDAY...South to southwest winds 5 to 10 knots, becoming
southwest to west. Bay waters smooth to a light chop. Scattered
showers and isolated thunderstorms.
.SUNDAY NIGHT...Southwest to west winds near 5 knots, becoming
variable. Bay waters smooth. Isolated showers and thunderstorms.
.MONDAY...South to southwest winds near 5 knots, becoming variable.
Bay waters smooth. Isolated showers and thunderstorms.
.MONDAY NIGHT...Variable winds near 5 knots. Bay waters smooth.
Isolated showers and thunderstorms.
.TUESDAY...Northeast to east winds near 5 knots, becoming east to
southeast. Bay waters smooth. Scattered showers and isolated
thunderstorms.
.TUESDAY NIGHT...East to southeast winds 5 to 10 knots, becoming
northeast to east and decreasing to near 5 knots. Bay waters
smooth to a light chop, becoming smooth. Isolated showers and
thunderstorms.
.WEDNESDAY...East winds near 5 knots. Bay waters smooth.
Scattered showers and isolated thunderstorms.
.WEDNESDAY NIGHT...East winds 5 to 10 knots. Bay waters smooth to
a light chop. Scattered showers and isolated thunderstorms.

$$

GMZ032-035-240245-
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-
1032 AM EDT Sat Aug 23 2025

.THIS AFTERNOON...Variable winds near 5 knots, becoming southwest
to west. Seas 1 foot or less. Nearshore waters smooth. Scattered
showers and isolated thunderstorms.
.TONIGHT...West winds near 5 knots, becoming south after
midnight. Seas 1 foot or less. Nearshore waters smooth. Isolated
showers and thunderstorms.
.SUNDAY...South winds 5 to 10 knots, becoming southwest to west
in the afternoon. Seas around 1 foot. Nearshore waters smooth to
a light chop. Isolated showers and thunderstorms.
.SUNDAY NIGHT...West to northwest winds near 5 knots, becoming
variable after midnight. Seas 1 foot or less. Nearshore waters
smooth. Isolated showers and thunderstorms.
.MONDAY...Southeast to south winds near 5 knots, becoming
variable. Seas 1 foot or less. Nearshore waters smooth. Isolated
showers and thunderstorms.
.MONDAY NIGHT...Variable winds near 5 knots, becoming northeast
to east after midnight. Seas 1 foot or less. Nearshore waters
smooth. Isolated showers and thunderstorms.
.TUESDAY...Northeast to east winds near 5 knots. Seas 1 foot or
less. Nearshore waters smooth. Isolated showers and
thunderstorms.
.TUESDAY NIGHT...Northeast to east winds 5 to 10 knots. Seas
around 1 foot. Nearshore waters smooth to a light chop. Isolated
showers and thunderstorms.
.WEDNESDAY...East winds near 5 knots. Seas 1 foot or less.
Nearshore waters smooth. Scattered showers and isolated
thunderstorms.
.WEDNESDAY NIGHT...East winds 5 to 10 knots. Seas around 1 foot.
Nearshore waters smooth to a light chop. Scattered showers and
isolated thunderstorms.

$$

GMZ042>044-240245-
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-
1032 AM EDT Sat Aug 23 2025

.THIS AFTERNOON...Variable winds near 5 knots, becoming southwest
to west. Seas 1 foot or less. Nearshore waters smooth. Scattered
showers and isolated thunderstorms.
.TONIGHT...West to northwest winds near 5 knots, becoming
southeast to south after midnight. Seas 1 foot or less. Nearshore
waters smooth. Isolated showers and thunderstorms.
.SUNDAY...Southeast to south winds 5 to 10 knots, becoming
southwest and decreasing to near 5 knots in the afternoon. Seas
around 1 foot. Nearshore waters smooth to a light chop, becoming
smooth. Isolated showers and thunderstorms.
.SUNDAY NIGHT...West to northwest winds near 5 knots, becoming
southeast after midnight. Seas 1 foot or less. Nearshore waters
smooth. Isolated showers and thunderstorms.
.MONDAY...Southeast to south winds near 5 knots, becoming variable.
Seas 1 foot or less. Nearshore waters smooth. Isolated showers
and thunderstorms.
.MONDAY NIGHT...Variable winds near 5 knots, becoming northeast to east.
Seas 1 foot or less. Nearshore waters smooth. Isolated showers
and thunderstorms.
.TUESDAY...Northeast to east winds near 5 knots. Seas 1 foot or
less. Nearshore waters smooth. Isolated showers and
thunderstorms.
.TUESDAY NIGHT...Northeast to east winds 5 to 10 knots. Seas
around 1 foot. Nearshore waters smooth to a light chop. Isolated
showers and thunderstorms.
.WEDNESDAY...East winds near 5 knots. Seas around 1 foot.
Nearshore waters smooth. Scattered showers and isolated
thunderstorms.
.WEDNESDAY NIGHT...East winds 5 to 10 knots. Seas around 1 foot.
Nearshore waters smooth to a light chop. Scattered showers and
isolated thunderstorms.

$$

GMZ052>055-072>075-240245-
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-
1032 AM EDT Sat Aug 23 2025

.THIS AFTERNOON...Southeast to south winds near 5 knots, becoming
variable. Seas 1 to 2 feet. Wave Detail: East to southeast 1 foot
at 3 seconds. Isolated showers and thunderstorms.
.TONIGHT...Variable winds near 5 knots, becoming southeast to
south and increasing to 5 to 10 knots after midnight. Seas 1 to 2
feet. Wave Detail: Northeast to east 1 foot at 3 seconds.
Isolated showers and thunderstorms.
.SUNDAY...Southeast to south winds 5 to 10 knots, becoming
variable and decreasing to near 5 knots. Seas 1 to 2 feet. Wave
Detail: East to southeast 1 foot at 3 seconds. Isolated showers
and thunderstorms.
.SUNDAY NIGHT...Variable winds 5 to 10 knots, becoming east to
southeast after midnight. Seas 1 to 2 feet. Isolated showers and
thunderstorms.
.MONDAY...East to southeast winds near 5 knots, becoming variable.
Seas 1 to 2 feet. Isolated showers and thunderstorms.
.MONDAY NIGHT...Northeast to east winds 5 to 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. Isolated showers and thunderstorms.
.TUESDAY NIGHT...East winds near 10 knots. Seas around 2 feet.
Isolated showers and thunderstorms.
.WEDNESDAY AND WEDNESDAY NIGHT...East winds 5 to 10 knots. Seas 1
to 2 feet. Scattered showers and isolated thunderstorms.

$$

GMZ033-034-240245-
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-
1032 AM EDT Sat Aug 23 2025

.THIS AFTERNOON...Southwest winds near 5 knots, becoming
southwest to west. Seas around 1 foot. Wave Detail: West 1 foot at
4 seconds. Scattered showers and isolated thunderstorms.
.TONIGHT...Southwest to west winds near 5 knots, becoming south
to southwest after midnight. Seas around 1 foot. Wave Detail:
West 1 foot at 4 seconds. Isolated showers and thunderstorms.
.SUNDAY...South to southwest winds 5 to 10 knots, becoming
southwest to west in the afternoon. Seas around 1 foot. Wave
Detail: Southwest 1 foot at 4 seconds. Isolated showers and
thunderstorms.
.SUNDAY NIGHT...West to northwest winds near 5 knots, becoming
variable after midnight. Seas around 1 foot. Isolated showers and
thunderstorms.
.MONDAY...Variable winds near 5 knots. Seas around 1 foot.
Isolated showers and thunderstorms.
.MONDAY NIGHT...Variable winds near 5 knots. Seas around 1 foot.
Isolated showers and thunderstorms.
.TUESDAY...Variable winds near 5 knots. Seas around 1 foot.
Isolated showers and thunderstorms.
.TUESDAY NIGHT...Variable winds near 5 knots, becoming northeast.
Seas 1 foot or less. Isolated showers and thunderstorms.
.WEDNESDAY...Northeast to east winds near 5 knots. Seas 1 foot or
less. Scattered showers and isolated thunderstorms.
.WEDNESDAY NIGHT...Northeast to east winds near 5 knots. Seas
1 foot or less. Scattered showers and isolated thunderstorms.

$$