952
FZUS52 KKEY 220231
CWFKEY

Coastal Waters Forecast for the Florida Keys
National Weather Service Key West FL
1031 PM EDT Mon Jul 21 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.

GMZ005-221445-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
1031 PM EDT Mon Jul 21 2025

.SYNOPSIS...Weak Atlantic ridging remains in place across the Keys
through approximately mid week. This will promote mainly light to
gentle easterly breezes, occasionally becoming variable. The
Atlantic ridging over the Atlantic will strengthen and shift
westward for mid to late week resulting in freshening east to
southeast breezes.

The Approximate Shoreward Edge of the Gulf Stream as of July 15...

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

$$

GMZ031-221445-
Florida Bay including Barnes Sound, Blackwater Sound, and
Buttonwood Sound-
1031 PM EDT Mon Jul 21 2025

.OVERNIGHT...Southeast winds near 5 knots. Bay waters smooth.
Isolated showers and thunderstorms.
.TUESDAY...Variable winds near 5 knots. Bay waters smooth.
Scattered showers and isolated thunderstorms.
.TUESDAY NIGHT...Northeast to east winds near 5 knots, becoming
southeast after midnight. Bay waters smooth. Scattered showers
and isolated thunderstorms.
.WEDNESDAY...Southeast winds 5 to 10 knots, increasing to near 10
knots. Bay waters smooth to a light chop, becoming a light chop.
Scattered showers and isolated thunderstorms.
.WEDNESDAY NIGHT...Southeast winds 10 to 15 knots. Bay waters a
light to moderate chop. Scattered showers and isolated
thunderstorms.
.THURSDAY...Southeast winds near 10 knots. Bay waters a light
chop. Scattered showers and isolated thunderstorms.
.THURSDAY NIGHT...East to southeast winds 10 to 15 knots. Bay
waters a light to moderate chop. Scattered showers and isolated
thunderstorms.
.FRIDAY...East to southeast winds 10 to 15 knots. Bay waters a
light to moderate chop. Scattered showers and isolated
thunderstorms.
.FRIDAY NIGHT...East to southeast winds 10 to 15 knots. Bay
waters a light to moderate chop. Isolated showers and
thunderstorms.
.SATURDAY...East to southeast winds 10 to 15 knots. Bay waters a
light to moderate chop. Isolated showers and thunderstorms.
.SATURDAY NIGHT...East winds near 10 knots. Bay waters a light
chop. Isolated showers and thunderstorms.

$$

GMZ032-035-221445-
Bayside and Gulf side from Craig Key to west end of Seven Mile
Bridge-
Gulf of Mexico from west end of Seven Mile Bridge to Halfmoon
Shoal out to 5 Fathoms-
1031 PM EDT Mon Jul 21 2025

.OVERNIGHT...East to southeast winds near 5 knots. Seas 1 foot or
less. Nearshore waters smooth. Isolated showers and
thunderstorms.
.TUESDAY...Variable winds near 5 knots. Seas 1 foot or less.
Nearshore waters smooth. Scattered showers and isolated
thunderstorms.
.TUESDAY NIGHT...Northeast to east winds near 5 knots, becoming
east to southeast. Seas 1 foot or less. Nearshore waters smooth.
Scattered showers and isolated thunderstorms.
.WEDNESDAY...Southeast winds 5 to 10 knots, increasing to near 10
knots. Seas 1 foot or less, building to around 1 foot. Nearshore
waters smooth to a light chop, becoming a light chop. Scattered
showers and isolated thunderstorms.
.WEDNESDAY NIGHT...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 near 10 knots. Seas around 1 foot.
Nearshore waters a light chop. Scattered showers and isolated
thunderstorms.
.THURSDAY NIGHT AND FRIDAY...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.
.FRIDAY...East to southeast winds 10 to 15 knots. Seas 1 to 2
feet, except 2 to 3 feet west of the Marquesas Keys. Nearshore
waters a light to moderate chop. Scattered showers and isolated
thunderstorms.
.FRIDAY NIGHT AND SATURDAY...East to southeast winds 10 to 15
knots. Seas 1 to 2 feet, except 2 to 3 feet west of the Marquesas
Keys. Nearshore waters a light to moderate chop. Isolated showers
and thunderstorms.
.SATURDAY NIGHT...East winds 10 to 15 knots. Seas 1 to 2 feet,
except 2 to 3 feet west of the Marquesas Keys. Nearshore waters a
light to moderate chop. Isolated showers and thunderstorms.

$$

GMZ042>044-221445-
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-
1031 PM EDT Mon Jul 21 2025

.OVERNIGHT...East to southeast winds 5 to 10 knots, decreasing to
near 5 knots. Seas around 1 foot. Nearshore waters smooth to a
light chop, becoming smooth. Isolated showers and thunderstorms.
.TUESDAY...Variable winds near 5 knots. Seas around 1 foot.
Nearshore waters smooth. Scattered showers and isolated
thunderstorms.
.TUESDAY NIGHT...Northeast to east winds near 5 knots, becoming
east to southeast. Seas around 1 foot. Nearshore waters smooth.
Scattered showers and isolated thunderstorms.
.WEDNESDAY...East to southeast winds 5 to 10 knots. Seas around
1 foot. Nearshore waters smooth to a light chop. Scattered
showers and isolated thunderstorms.
.WEDNESDAY NIGHT...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.
Scattered showers and isolated thunderstorms.
.THURSDAY...Southeast winds near 10 knots. Seas 1 to 2 feet.
Nearshore waters a light chop. Scattered showers and isolated
thunderstorms.
.THURSDAY NIGHT...East to southeast winds 10 to 15 knots,
increasing to near 15 knots. Seas 1 to 3 feet, building to 2 to 3
feet. Nearshore waters a light to moderate chop, becoming a
moderate chop. Scattered showers and isolated thunderstorms.
.FRIDAY...East to southeast winds 10 to 15 knots. Seas 2 to
3 feet. Nearshore waters a light to moderate chop. Scattered
showers and isolated thunderstorms.
.FRIDAY NIGHT AND SATURDAY...East to southeast winds 10 to 15
knots. Seas 2 to 3 feet. Nearshore waters a light to moderate
chop. Isolated showers and thunderstorms.
.SATURDAY NIGHT...East winds 10 to 15 knots. Seas 2 to 3 feet.
Nearshore waters a light to moderate chop. Isolated showers and
thunderstorms.

$$

GMZ052>055-072>075-221445-
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-
1031 PM EDT Mon Jul 21 2025

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

$$

GMZ033-034-221445-
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-
1031 PM EDT Mon Jul 21 2025

.OVERNIGHT...North to northeast winds near 5 knots, becoming east
to southeast around 5 knots late this evening and overnight. Seas
1 foot or less. Scattered showers and isolated thunderstorms.
.TUESDAY...Variable winds near 5 knots. Seas around 1 foot. Wave
Detail: Northwest to north 1 foot at 4 seconds. Scattered showers
and isolated thunderstorms.
.TUESDAY NIGHT...Northeast winds near 5 knots, becoming southeast
after midnight. Seas around 1 foot. Scattered showers and
isolated thunderstorms.
.WEDNESDAY...Southeast winds near 5 knots. Seas around 1 foot.
Scattered showers and isolated thunderstorms.
.WEDNESDAY NIGHT...Southeast winds 5 to 10 knots, increasing to
near 10 knots. Seas around 1 foot, building to 1 to 2 feet.
Scattered showers and isolated thunderstorms.
.THURSDAY...Southeast winds near 10 knots, decreasing to 5 to 10
knots. Seas 1 to 2 feet. Scattered showers and isolated
thunderstorms.
.THURSDAY NIGHT...East to southeast winds near 10 knots,
increasing to 10 to 15 knots. Seas 1 to 2 feet, building to
around 2 feet. Scattered showers and isolated thunderstorms.
.FRIDAY AND FRIDAY NIGHT...East to southeast winds 10 to 15
knots. Seas 2 to 3 feet. Scattered showers and isolated
thunderstorms.
.SATURDAY AND SATURDAY NIGHT...East to southeast winds 10 to 15
knots. Seas 2 to 3 feet. Isolated showers and thunderstorms.

$$