187
FZUS52 KKEY 131419
CWFKEY

Coastal Waters Forecast for the Florida Keys
National Weather Service Key West FL
1019 AM EDT Sun Jul 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.

GMZ005-140230-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
1019 AM EDT Sun Jul 13 2025

.SYNOPSIS...High pressure remains in control across much of the
Florida Keys through tonight. This will result in east to
southeast breezes early this morning becoming variable. Weak low
pressure tries to develop in the vicinity of Florida heading
through the first half of the week. Initially, the Keys will be on
the southern fringe in a col region resulting in mainly variable
breezes through Monday night. As the weak low pressure area shifts
to the west and high pressure builds in behind, breezes will
freshen becoming southeast to south at first, before becoming east
to southeast for mid to late week. Also, expect increasing
coverage of showers and thunderstorms for the early to middle part
of the week.

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

14 NM South of Dry Tortugas Light...on Loggerhead Key.
 5 NM South of Cosgrove Shoal Light...off the Marquesas Keys.
 4 NM South of Sand Key Light...off Key West.
 4 NM South of Looe Key...off Big Pine Key.
 5 NM Southeast of Sombrero Key Light...off Marathon.
 6 NM Southeast of Alligator Reef Light...off Islamorada.
 3 NM Southeast of Molasses Reef Light...off Key Largo.
 4 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.

$$

GMZ031-140230-
Florida Bay including Barnes Sound, Blackwater Sound, and
Buttonwood Sound-
1019 AM EDT Sun Jul 13 2025

.THIS AFTERNOON...Variable winds near 5 knots. Bay waters smooth.
Numerous showers and isolated thunderstorms.
.TONIGHT...Variable winds near 5 knots. Bay waters smooth.
Scattered showers and isolated thunderstorms.
.MONDAY...Variable winds near 5 knots. Bay waters smooth.
Bay waters rough and winds higher in and around widespread
showers and scattered thunderstorms.
.MONDAY NIGHT...Variable winds near 5 knots, becoming south to
southwest after midnight. Bay waters smooth. Numerous showers and
scattered thunderstorms.
.TUESDAY...South winds 5 to 10 knots. Bay waters smooth to a
light chop. Numerous showers and scattered thunderstorms.
.TUESDAY NIGHT...Southeast to south 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 thunderstorms.
.WEDNESDAY...Southeast to south winds 10 to 15 knots, decreasing
to near 10 knots. Bay waters a light to moderate chop, becoming a
light chop. Numerous showers and scattered thunderstorms.
.WEDNESDAY NIGHT...East to southeast winds near 10 knots,
becoming southeast and increasing to near 15 knots. Bay waters a
light chop, becoming a moderate chop. Scattered showers and
isolated thunderstorms.
.THURSDAY AND THURSDAY NIGHT...East to southeast winds 10 to 15
knots. Bay waters a light to moderate chop. Scattered showers and
isolated thunderstorms.

$$

GMZ032-035-140230-
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-
1019 AM EDT Sun Jul 13 2025

.THIS AFTERNOON...Variable winds near 5 knots. Seas 1 foot or
less. Nearshore waters smooth. Scattered showers and isolated
thunderstorms.
.TONIGHT...Variable winds near 5 knots. Seas 1 foot or less.
Nearshore waters smooth. Scattered showers and isolated
thunderstorms.
.MONDAY...Variable winds near 5 knots, becoming northwest to north
in the afternoon. Seas 1 foot or less. Nearshore waters smooth.
Winds and seas higher in and around numerous showers and
scattered thunderstorms.
.MONDAY NIGHT...Northwest to north winds near 5 knots, becoming
variable after midnight. Seas 1 foot or less. Nearshore waters
smooth. Numerous showers and scattered thunderstorms.
.TUESDAY...South to southwest winds near 5 knots, becoming south
and increasing to 5 to 10 knots. Seas 1 foot or less, building to
around 1 foot. Nearshore waters smooth, becoming smooth to a
light chop. Numerous showers and scattered thunderstorms.
.TUESDAY NIGHT...Southeast to south 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. Numerous showers and scattered
thunderstorms.
.WEDNESDAY...Southeast to south winds 10 to 15 knots, becoming
southeast and decreasing to near 10 knots. Seas 1 to 2 feet.
Nearshore waters a light to moderate chop, becoming a light chop.
Scattered showers and thunderstorms.
.WEDNESDAY 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.
.THURSDAY...Southeast winds 10 to 15 knots. Seas 1 to 2 feet.
Nearshore waters a light to moderate chop. Scattered showers and
isolated thunderstorms.
.THURSDAY 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.

$$

GMZ042>044-140230-
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-
1019 AM EDT Sun Jul 13 2025

.THIS AFTERNOON...Variable winds near 5 knots. Seas around 1
foot, subsiding to 1 foot or less. Nearshore waters smooth.
Numerous showers and isolated thunderstorms.
.TONIGHT...Variable winds near 5 knots. Seas 1 foot or less.
Nearshore waters smooth. Scattered showers and isolated
thunderstorms.
.MONDAY...Variable winds near 5 knots, becoming northwest to north
in the afternoon. Seas 1 foot or less. Nearshore waters smooth.
Winds and seas higher in and around numerous showers and
scattered thunderstorms.
.MONDAY NIGHT...Northwest to north 5 to 10 knots, becoming
variable and decreasing to near 5 knots after midnight. Seas 1
foot or less. Nearshore waters smooth to a light chop, becoming
smooth. Numerous showers and scattered thunderstorms.
.TUESDAY...South winds 5 to 10 knots. Seas around 1 foot.
Nearshore waters smooth to a light chop. Numerous showers and
scattered thunderstorms.
.TUESDAY NIGHT...Southeast to south 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
thunderstorms.
.WEDNESDAY...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. Scattered showers and
thunderstorms.
.WEDNESDAY NIGHT...East to southeast winds near 10 knots,
increasing to 10 to 15 knots. Seas around 2 feet, building to 2
to 3 feet. Nearshore waters a light chop, becoming a light to
moderate chop. Scattered showers and isolated thunderstorms.
.THURSDAY...Southeast winds 10 to 15 knots. Seas 2 to 3 feet.
Nearshore waters a light to moderate chop. Scattered showers and
isolated thunderstorms.
.THURSDAY NIGHT...East to southeast winds 10 to 15 knots,
increasing to near 15 knots. Seas 2 to 3 feet, building to around
3 feet. Nearshore waters a light to moderate chop, becoming a
moderate chop. Scattered showers and isolated thunderstorms.

$$

GMZ052>055-072>075-140230-
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-
1019 AM EDT Sun Jul 13 2025

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

$$

GMZ033-034-140230-
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-
1019 AM EDT Sun Jul 13 2025

.THIS AFTERNOON...Variable winds near 5 knots. Seas 1 foot or
less. Scattered showers and isolated thunderstorms.
.TONIGHT...Variable winds near 5 knots. Seas 1 foot or less.
Scattered showers and isolated thunderstorms.
.MONDAY...Northwest winds near 5 knots, increasing to 5 to
10 knots in the afternoon. Seas 1 foot or less. Winds and seas
higher in and around scattered showers and thunderstorms.
.MONDAY NIGHT...Northwest to north winds 5 to 10 knots, becoming
variable after midnight. Seas around 1 foot. Numerous showers and
scattered thunderstorms.
.TUESDAY...Southwest winds near 5 knots. Seas around 1 foot.
Numerous showers and scattered thunderstorms.
.TUESDAY NIGHT...South to southwest winds 5 to 10 knots, becoming
southeast to south and increasing to 10 to 15 knots. Seas around
1 foot, building to 1 to 2 feet. Numerous showers and scattered
thunderstorms.
.WEDNESDAY...Southeast to south winds 10 to 15 knots, becoming
southeast and decreasing to near 10 knots. Seas 1 to 2 feet.
Scattered showers and thunderstorms.
.WEDNESDAY NIGHT...East to southeast winds near 10 knots,
becoming southeast and increasing to 10 to 15 knots. Seas 1 to 2
feet. Scattered showers and isolated thunderstorms.
.THURSDAY...Southeast winds 10 to 15 knots. Seas 1 to 2 feet.
Scattered showers and isolated thunderstorms.
.THURSDAY NIGHT...East to southeast winds 10 to 15 knots,
increasing to near 15 knots. Seas 1 to 2 feet, building to 2 to 3
feet. Scattered showers and isolated thunderstorms.

$$

MJV/AJP