767
FZUS52 KKEY 042019
CWFKEY

Coastal Waters Forecast for the Florida Keys
National Weather Service Key West FL
419 PM EDT Fri Apr 4 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.

GMZ005-050230-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
419 PM EDT Fri Apr 4 2025

.SYNOPSIS...A pronounced high pressure system over the North
Atlantic continues to sustain fresh to strong east to
southeasterly breezes across the Florida Keys waters. Breezes will
begin to slacken Sunday morning as a low pressure system deepens
over the eastern United States. Shower chances will stay near nil
until 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.

$$

GMZ031-050230-
Florida Bay including Barnes Sound, Blackwater Sound, and
Buttonwood Sound-
419 PM EDT Fri Apr 4 2025

...SMALL CRAFT ADVISORY IN EFFECT...

.TONIGHT...East to southeast winds near 20 knots, increasing to 20
to 25 knots. Bay waters rough, becoming very rough.
.SATURDAY...East to southeast winds near 20 knots. Bay waters
rough.
.SATURDAY NIGHT...East to southeast winds near 20 knots. Bay
waters rough.
.SUNDAY...Southeast winds near 20 knots, decreasing to 15 to 20
knots. Bay water rough, becoming choppy.
.SUNDAY NIGHT...East to southeast winds near 15 knots. Bay waters
a moderate chop. Isolated showers.
.MONDAY...Southeast to south winds decreasing to 10 to 15 knots.
Bay waters becoming a light to moderate chop. Isolated showers.
.MONDAY NIGHT...South winds decreasing to 5 to 10 knots. Bay
waters becoming smooth to a light chop. Scattered showers.
.TUESDAY...Southwest to west winds near 10 knots. Bay waters a
light chop. Scattered showers and isolated thunderstorms.
.TUESDAY NIGHT...Northwest to north winds 10 to 15 knots. Bay
waters a light to moderate chop. Scattered showers.
.WEDNESDAY...Northwest to north winds 10 to 15 knots. Bay waters
a light to moderate chop. Isolated showers.
.WEDNESDAY NIGHT...North to northeast winds 10 to 15 knots. Bay
waters a light to moderate chop. Isolated showers.

$$

GMZ032-035-050230-
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-
419 PM EDT Fri Apr 4 2025

...SMALL CRAFT ADVISORY IN EFFECT...

.TONIGHT...East to southeast winds 20 to 25 knots. Seas 2 to
3 feet, except 4 to 6 feet, occasionally to 8 feet west of the
Marquesas Keys. Nearshore waters very rough.
.SATURDAY...East to southeast winds 20 to 25 knots, decreasing to
near 20 knots. Seas 2 to 3 feet, except 4 to 6 feet, occasionally
to 8 feet west of the Marquesas Keys. Nearshore waters very
rough, becoming rough.
.SATURDAY NIGHT...East to southeast winds 20 to 25 knots. Seas
2 to 3 feet, except 4 to 5 feet, occasionally to 6 feet west of
the Marquesas Keys. Nearshore waters very rough.
.SUNDAY...Southeast winds near 20 knots, decreasing to 15 to 20
knots. Seas 2 to 3 feet, except 3 to 5 feet, occasionally to 6
feet west of the Marquesas Keys. Nearshore waters rough, becoming
choppy.
.SUNDAY NIGHT...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 decreasing to 10 to 15 knots.
Seas 1 to 2 feet. Nearshore waters becoming a light to moderate
chop. Isolated showers.
.MONDAY NIGHT...South winds decreasing to 5 to 10 knots. Seas
around 1 foot. Nearshore waters becoming smooth to a light chop.
Scattered showers.
.TUESDAY...Southwest to west winds 5 to 10 knots. Seas 1 to 2
feet, except building to 2 to 3 feet west of the Marquesas Keys.
Nearshore waters smooth to a light chop. Scattered showers and
isolated thunderstorms.
.TUESDAY NIGHT...North winds 10 to 15 knots, increasing to near 15
knots. Seas 2 to 3 feet. Nearshore waters a light to moderate
chop, becoming a moderate chop. Scattered showers.
.WEDNESDAY...North winds near 15 knots. Seas 2 to 3 feet.
Nearshore waters a moderate chop. Isolated showers.
.WEDNESDAY NIGHT...North to northeast winds near 15 knots. Seas 2
to 3 feet. Nearshore waters a moderate chop. Isolated showers.

$$

GMZ042>044-050230-
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-
419 PM EDT Fri Apr 4 2025

...SMALL CRAFT ADVISORY IN EFFECT...

.TONIGHT...East to southeast winds 20 to 25 knots. Seas 4 to
6 feet, occasionally to 8 feet. Nearshore waters very rough.
.SATURDAY...East to southeast winds 20 to 25 knots, decreasing to
near 20 knots. Seas 4 to 6 feet, occasionally to 8 feet.
Nearshore waters very rough, becoming rough.
.SATURDAY NIGHT...East to southeast winds 20 to 25 knots. Seas 4
to 6 feet, occasionally to 8 feet. Nearshore waters very rough.
.SUNDAY...Southeast winds near 20 knots, decreasing to 15 to 20
knots. Seas 3 to 5 feet, occasionally to 6 feet. Nearshore waters
rough, becoming choppy.
.SUNDAY NIGHT...Southeast winds near 15 knots. Seas 2 to 3 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 3 feet. Nearshore waters a moderate
chop, becoming a light to moderate chop. Isolated showers.
.MONDAY NIGHT...Southeast to south winds near 10 knots, becoming
south to southwest 5 to 10 knots. Seas 1 to 2 feet. Nearshore
waters a light chop, becoming smooth to a light chop. Scattered
showers.
.TUESDAY...Southwest to west winds near 10 knots. Seas 1 to 2
feet, except 2 to 3 feet west of Cosgrove Shoal Light. Nearshore
waters a light chop. Scattered showers and isolated thunderstorms.
.TUESDAY NIGHT...Northwest to north winds 10 to 15 knots,
increasing to 15 to 20 knots. Seas 1 to 2 feet, except 3 to 4
feet, occasionally to 5 feet west of Cosgrove Shoal Light.
Nearshore waters a light to moderate chop, becoming choppy.
Scattered showers.
.WEDNESDAY...North winds 15 to 20 knots, decreasing to near 15
knots. Seas 1 to 2 feet, building to around 2 feet, except 3 to 4
feet, occasionally to 5 feet west of Cosgrove Shoal Light.
Nearshore waters choppy, becoming a moderate chop. Isolated
showers.
.WEDNESDAY NIGHT...North to northeast winds near 15 knots. Seas 2
to 3 feet, except 3 to 4 feet, occasionally to 5 feet west of
Cosgrove Shoal Light. Nearshore waters a moderate chop. Isolated
showers.

$$

GMZ052>055-072>075-050230-
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-
419 PM EDT Fri Apr 4 2025

...SMALL CRAFT ADVISORY IN EFFECT...

.TONIGHT...East to southeast winds 20 to 25 knots, increasing to
near 25 knots. Seas 6 to 9 feet, occasionally to 11 feet. Wave
Detail: East 8 feet at 7 seconds.
.SATURDAY AND SATURDAY NIGHT...East to southeast winds 20 to 25
knots. Seas 5 to 8 feet, occasionally to 10 feet. Wave Detail:
East to southeast 8 feet at 7 seconds.
.SUNDAY...Southeast winds near 20 knots, decreasing to 15 to 20
knots. Seas 5 to 7 feet, occasionally to 9 feet, subsiding to 3 to
5 feet, occasionally to 6 feet.
.SUNDAY NIGHT...Southeast winds 15 to 20 knots. Seas 3 to 5 feet,
occasionally to 6 feet. Isolated showers.
.MONDAY...Southeast to south winds decreasing to near 15 knots.
Seas 2 to 4 feet, occasionally to 5 feet. Isolated showers.
.MONDAY NIGHT...Southeast to south winds near 10 knots, becoming
south to southwest 5 to 10 knots. Seas 1 to 2 feet. Scattered
showers.
.TUESDAY...Southwest to west winds near 10 knots. Seas 2 to 3
feet. Scattered showers and isolated thunderstorms.
.TUESDAY NIGHT...Northwest winds 10 to 15 knots, becoming
northwest to north 15 to 20 knots. Seas 2 to 3 feet, building to
3 to 5 feet, occasionally to 6 feet after midnight. Scattered
showers.
.WEDNESDAY...North winds 15 to 20 knots, decreasing to near 15
knots. Seas 3 to 5 feet, occasionally to 6 feet. Scattered
showers.
.WEDNESDAY NIGHT...North to northeast winds near 15 knots. Seas 2
to 4 feet, occasionally to 5 feet. Isolated showers.

$$

GMZ033-034-050230-
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-
419 PM EDT Fri Apr 4 2025

...SMALL CRAFT ADVISORY IN EFFECT...

.TONIGHT...East to southeast winds 20 to 25 knots. Seas 4 to
6 feet, occasionally to 8 feet. Wave Detail: East to southeast
6 feet at 5 seconds.
.SATURDAY...East to southeast winds 20 to 25 knots, decreasing to
near 20 knots. Seas 4 to 6 feet, occasionally to 8 feet. Wave
Detail: Southeast 6 feet at 5 seconds.
.SATURDAY NIGHT...East to southeast winds 20 to 25 knots,
decreasing to near 20 knots. Seas 4 to 6 feet, occasionally to 8
feet. Wave Detail: East to southeast 5 feet at 5 seconds.
.SUNDAY...Southeast winds near 20 knots, decreasing to 15 to 20
knots. Seas 3 to 5 feet, occasionally to 6 feet.
.SUNDAY NIGHT...Southeast winds near 15 knots. Seas 2 to 3 feet.
Isolated showers.
.MONDAY...South winds 10 to 15 knots. Seas 2 to 3 feet. Isolated
showers.
.MONDAY NIGHT...Southwest winds decreasing to 5 to 10 knots. Seas
1 to 2 feet. Scattered showers.
.TUESDAY...West to northwest winds 5 to 10 knots, becoming
northwest to north 10 to 15 knots. Seas 2 to 4 feet, occasionally
to 5 feet. Scattered showers and isolated thunderstorms.
.TUESDAY NIGHT...North winds 15 to 20 knots. Seas 3 to 5 feet,
occasionally to 6 feet. Isolated showers.
.WEDNESDAY...North winds 15 to 20 knots, decreasing to near 15
knots. Seas 3 to 4 feet, occasionally to 5 feet. Isolated
showers.
.WEDNESDAY NIGHT...North to northeast winds 15 to 20 knots. Seas
3 to 4 feet, occasionally to 5 feet. Isolated showers.

$$

JAM