869
FZUS52 KKEY 060818
CWFKEY

Coastal Waters Forecast for the Florida Keys
National Weather Service Key West FL
418 AM EDT Sun Apr 6 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.

GMZ005-061500-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
418 AM EDT Sun Apr 6 2025

.SYNOPSIS...Breezes will gradually slacken this morning as a low
pressure system deepens over the eastern United States. Shower
chances will increase next week when a frontal passage may occur
sometime around Tuesday to Wednesday, with a slight chance of
thunderstorms on Tuesday. Breezes will freshen and veer to the
northwest to north as the front approaches and passes through the
Keys.

The Approximate Shoreward Edge of the Gulf Stream as of March 31...

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

$$

GMZ031-061500-
Florida Bay including Barnes Sound, Blackwater Sound, and
Buttonwood Sound-
418 AM EDT Sun Apr 6 2025

...SMALL CRAFT SHOULD EXERCISE CAUTION UNTIL WINDS DECREASE...

.TODAY...Southeast winds 15 to 20 knots, decreasing to near 15
knots in the afternoon. Bay waters choppy, becoming a moderate
chop.
.TONIGHT...Southeast winds near 15 knots. Bay waters a moderate
chop.
.MONDAY...Southeast to south winds near 15 knots, decreasing to 10
to 15 knots. Bay waters a moderate chop, becoming a light to
moderate chop.
.MONDAY NIGHT...Southeast to south winds 10 to 15 knots, becoming
south to southwest. Bay waters a light to moderate chop.
Scattered showers.
.TUESDAY...Southwest to west winds 10 to 15 knots, becoming west
to northwest. Bay waters a light to moderate chop. Scattered
showers and isolated thunderstorms.
.TUESDAY NIGHT...Northwest to north winds near 15 knots. Bay
waters a moderate chop. Scattered showers.
.WEDNESDAY...Northwest to north winds near 15 knots, becoming
north near 10 knots. Bay waters a moderate chop, becoming a light
chop. Isolated showers.
.WEDNESDAY NIGHT...North to northeast winds 10 to 15 knots,
increasing to 15 to 20 knots. Bay waters a light to moderate
chop, becoming choppy.
.THURSDAY...Northeast winds near 15 knots. Bay waters a moderate
chop.
.THURSDAY NIGHT...Northeast winds near 15 knots. Bay waters a
moderate chop. Isolated showers.

$$

GMZ032-035-061500-
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-
418 AM EDT Sun Apr 6 2025

...SMALL CRAFT SHOULD EXERCISE CAUTION UNTIL WINDS DECREASE...

.TODAY...Southeast winds 15 to 20 knots, decreasing to near 15
knots. Seas 2 to 3 feet, subsiding to 1 to 2 feet. West of the
Marquesas Keys, seas 4 to 5 feet, occasionally to 6 feet,
subsiding to 3 to 4 feet. Nearshore waters choppy, becoming a
moderate chop.
.TONIGHT...Southeast winds near 15 knots. Seas 1 to 2 feet,
except 2 to 3 feet west of the Marquesas Keys. Nearshore waters a
moderate chop. Isolated showers.
.MONDAY...Southeast to south winds near 15 knots, decreasing to 10
to 15 knots. Seas 1 to 2 feet. Nearshore waters a moderate chop,
becoming a light to moderate chop.
.MONDAY NIGHT...Southeast to south winds near 10 knots, becoming
south to southwest 10 to 15 knots. Seas 1 to 2 feet. Nearshore
waters a light chop, becoming a light to moderate chop. Scattered
showers.
.TUESDAY...West to northwest winds 10 to 15 knots, becoming
northwest to north near 15 knots late. Seas building to 2 to 3
feet, except building to 3 to 4 feet west of the Marquesas Keys.
Nearshore waters a light to moderate chop, becoming a moderate
chop. Scattered showers and isolated thunderstorms.
.TUESDAY NIGHT...Northwest to north winds 15 to 20 knots. Seas
3 to 5 feet, occasionally to 6 feet, except 5 to 6 feet,
occasionally to 8 feet west of the Marquesas Keys. Nearshore
waters choppy. Scattered showers and isolated thunderstorms.
.WEDNESDAY...Northwest to north winds 15 to 20 knots, decreasing
to 10 to 15 knots. Seas 2 to 4 feet, occasionally to 5 feet,
except 4 to 5 feet, occasionally to 6 feet west of the Marquesas
Keys. Nearshore waters choppy, becoming light to moderate chop.
Isolated showers.
.WEDNESDAY NIGHT...North winds 10 to 15 knots, becoming north to
northeast 15 to 20 knots. Seas 2 to 4 feet, occasionally to 5
feet. Nearshore waters a light to moderate chop, becoming choppy.
.THURSDAY...Northeast winds near 15 knots, decreasing to 10 to 15
knots. Seas subsiding to 2 to 3 feet. Nearshore waters a moderate
chop, becoming a light to moderate chop.
.THURSDAY NIGHT...Northeast winds near 15 knots. Seas 1 to
2 feet, except 2 to 3 feet west of the Marquesas Keys. Nearshore
waters a moderate chop. Isolated showers.

$$

GMZ042>044-061500-
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-
418 AM EDT Sun Apr 6 2025

...SMALL CRAFT SHOULD EXERCISE CAUTION UNTIL WINDS AND SEAS
SUBSIDE...

.TODAY...Southeast winds 15 to 20 knots, decreasing to near 15
knots. Seas 4 to 6 feet, occasionally to 8 feet, subsiding to 3 to
5 feet. Nearshore waters choppy, becoming a moderate chop.
.TONIGHT...Southeast winds near 15 knots. Seas 3 to 4 feet,
occasionally to 5 feet. Nearshore waters a moderate chop.
Isolated showers.
.MONDAY...Southeast to south winds near 15 knots, decreasing to
10 to 15 knots. Seas 2 to 4 feet, occasionally to 5 feet,
subsiding to 2 to 3 feet. Nearshore waters a moderate chop,
becoming a light to moderate chop.
.MONDAY NIGHT...Southeast to south winds 10 to 15 knots, becoming
south to southwest. Seas around 2 feet. Nearshore waters a light
to moderate chop. Scattered showers.
.TUESDAY...Southwest to west winds 10 to 15 knots, becoming west
to northwest near 15 knots late. Seas 1 to 2 feet, except building
to 2 to 4 feet, occasionally to 5 feet west of Cosgrove Shoal
Light. Nearshore waters a light chop, becoming a moderate chop.
Scattered showers and isolated thunderstorms.
.TUESDAY NIGHT...Northwest to north winds 15 to 20 knots. Seas
building to 2 to 3 feet, except building to 4 to 6 feet,
occasionally to 8 feet west of Cosgrove Shoal Light. Nearshore
waters choppy. Scattered showers and isolated thunderstorms.
.WEDNESDAY...Northwest to north winds 15 to 20 knots, becoming
north 10 to 15 knots in the afternoon. Seas 1 to 3 feet, except
3 to 5 feet, occasionally to 6 feet west of Cosgrove Shoal Light.
Nearshore waters choppy, becoming a light to moderate chop.
Isolated showers.
.WEDNESDAY NIGHT...North winds 10 to 15 knots, becoming north to
northeast 15 to 20 knots. Seas 2 to 3 feet, except 3 to 4 feet,
occasionally to 5 feet west of Cosgrove Shoal Light. Nearshore
waters a light to moderate chop, becoming choppy.
.THURSDAY...Northeast winds near 15 knots. Seas 2 to 3 feet,
except 3 to 4 feet west of Cosgrove Shoal Light. Nearshore waters
a moderate chop.
.THURSDAY NIGHT...Northeast winds near 15 knots. Seas 2 to
3 feet. Nearshore waters a moderate chop. Isolated showers.

$$

GMZ052>055-072>075-061500-
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-
418 AM EDT Sun Apr 6 2025

...SMALL CRAFT ADVISORY IN EFFECT...

.TODAY...East to southeast winds near 20 knots, decreasing to 15
to 20 knots. Seas 5 to 7 feet, occasionally to 9 feet, subsiding
to 4 to 6 feet. Wave Detail: East to southeast 7 feet at 7
seconds.
.TONIGHT...Southeast winds 15 to 20 knots, decreasing to near 15
knots late. Seas 4 to 5 feet, occasionally to 6 feet. Wave
Detail: East to southeast 5 feet at 6 seconds. Isolated showers.
.MONDAY...Southeast to south winds near 15 knots, decreasing to 10
to 15 knots. Seas 2 to 4 feet, occasionally to 5 feet. Wave
Detail: East to southeast 4 feet at 6 seconds. Isolated showers.
.MONDAY NIGHT...Southeast to south winds 10 to 15 knots, becoming
south to southwest after midnight. Seas 2 to 3 feet. Scattered
showers.
.TUESDAY...Southwest to west winds 10 to 15 knots, becoming west
to northwest near 15 knots late. Seas 2 to 3 feet, except building
to 3 to 5 feet west of Halfmoon Shoal Light. Scattered showers
and isolated thunderstorms.
.TUESDAY NIGHT...Northwest to north winds 15 to 20 knots,
increasing to near 20 knots. Seas building to 3 to 5 feet. West of
Halfmoon Shoal Light, seas 5 to 6 feet, occasionally to 8 feet.
Numerous showers and isolated thunderstorms.
.WEDNESDAY...Northwest to north winds 15 to 20 knots, decreasing
to 10 to 15 knots. Seas 4 to 6 feet, occasionally to 8 feet,
subsiding to 3 to 5 feet. Isolated showers.
.WEDNESDAY NIGHT...North winds 10 to 15 knots, becoming north to
northeast 15 to 20 knots. Seas 3 to 5 feet, occasionally to 6
feet.
.THURSDAY...Northeast winds near 15 knots. Seas 4 to 5 feet,
occasionally to 6 feet.
.THURSDAY NIGHT...Northeast winds 15 to 20 knots. Seas 4 to
5 feet, occasionally to 6 feet. Isolated showers.

$$

GMZ033-034-061500-
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-
418 AM EDT Sun Apr 6 2025

...SMALL CRAFT SHOULD EXERCISE CAUTION UNTIL WINDS DECREASE...

.TODAY...Southeast winds 15 to 20 knots, decreasing to near 15
knots this afternoon. Seas 3 to 5 feet, occasionally to 6 feet.
Wave Detail: Southeast 5 feet at 5 seconds.
.TONIGHT...Southeast winds near 15 knots, decreasing to 10 to 15
knots late. Seas 2 to 4 feet, occasionally to 5 feet. Wave
Detail: Southeast 3 feet at 5 seconds. Isolated showers.
.MONDAY...Southeast to south winds 10 to 15 knots. Seas 2 to
3 feet. Wave Detail: Southeast to south 3 feet at 4 seconds.
Isolated showers.
.MONDAY NIGHT...South winds near 10 knots, becoming southwest to
west 10 to 15 knots. Seas 1 to 2 feet, building to 2 to 3 feet.
Scattered showers.
.TUESDAY...Northwest winds 10 to 15 knots, becoming northwest to
north 15 to 20 knots in the afternoon. Seas building to 4 to 6
feet, occasionally to 8 feet. Numerous showers and isolated
thunderstorms.
.TUESDAY NIGHT...Northwest to north winds near 20 knots. Seas
5 to 6 feet, occasionally to 8 feet, subsiding to 4 to 5 feet.
Isolated showers.
.WEDNESDAY...North winds 15 to 20 knots, decreasing to near 15
knots. Seas 3 to 5 feet, occasionally to 6 feet.
.WEDNESDAY NIGHT...North to northeast winds 15 to 20 knots. Seas
3 to 5 feet, occasionally to 6 feet.
.THURSDAY...North to northeast winds near 15 knots, decreasing to 10
to 15 knots. Seas 2 to 4 feet, occasionally to 5 feet.
.THURSDAY NIGHT...North to northeast winds near 15 knots. Seas
2 to 3 feet. Isolated showers.

$$