685
FZUS52 KKEY 040830
CWFKEY

Coastal Waters Forecast for the Florida Keys
National Weather Service Key West FL
430 AM 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.

GMZ005-041430-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
430 AM EDT Fri Apr 4 2025

.SYNOPSIS...A pronounced high pressure system remains over the
North Atlantic, which is sustaining 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. Lightning probabilities are absent from the
forecast at this time due to the uncertain strength of the
potential front.

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.

$$

GMZ031-041430-
Florida Bay including Barnes Sound, Blackwater Sound, and
Buttonwood Sound-
430 AM EDT Fri Apr 4 2025

...SMALL CRAFT ADVISORY IN EFFECT...

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

$$

GMZ032-035-041430-
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-
430 AM EDT Fri Apr 4 2025

...SMALL CRAFT ADVISORY IN EFFECT...

.TODAY...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.
.TONIGHT AND SATURDAY...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.
.SATURDAY NIGHT...East to southeast winds 20 to 25 knots,
decreasing to near 20 knots. Seas 2 to 3 feet, except 4 to 5
feet, occasionally to 6 feet west of the Marquesas Keys. Nearshore
waters very rough, becoming 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, decreasing to 10
to 15 knots. Seas 1 to 2 feet, except 2 to 3 feet west of the
Marquesas Keys. Nearshore waters a moderate chop, becoming a
light to moderate chop. Isolated showers.
.MONDAY...Southeast to south winds 10 to 15 knots. Seas 1 to
2 feet. Nearshore waters a light to moderate chop. Isolated
showers.
.MONDAY NIGHT...Southeast to south winds near 10 knots, becoming
south to southwest and decreasing to 5 to 10 knots. Seas 1 to 2
feet. Nearshore waters a light chop, becoming a smooth to a light
chop. Scattered showers.
.TUESDAY...West winds 5 to 10 knots, becoming west to northwest
and increasing to 10 to 15 knots. Seas 1 to 2 feet. Nearshore
waters smooth to a light chop, becoming a light to moderate chop.
Scattered showers.
.TUESDAY NIGHT...Northwest to north winds 10 to 15 knots. Seas 2
to 3 feet, except 3 to 4 feet, occasionally to 5 feet west of the
Marquesas Keys. Nearshore waters a light to moderate chop.
Scattered showers.

$$

GMZ042>044-041430-
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-
430 AM EDT Fri Apr 4 2025

...SMALL CRAFT ADVISORY IN EFFECT...

.TODAY...East to southeast winds 20 to 25 knots. Seas 5 to 7
feet, occasionally to 8 feet. Nearshore waters very rough.
.TONIGHT AND SATURDAY...East to southeast winds 20 to 25 knots.
Seas 5 to 7 feet, occasionally to 8 feet. Nearshore waters very
rough.
.SATURDAY NIGHT...East to southeast winds near 20 knots. Seas
3 to 5 feet, occasionally to 6 feet. Nearshore waters 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 10 to 15 knots, decreasing to
near 10 knots. Seas 2 to 3 feet. Nearshore waters a light to
moderate chop, becoming a light chop. Isolated showers.
.MONDAY NIGHT...South winds 5 to 10 knots, becoming south to
southwest. Seas 1 to 2 feet. Nearshore waters smooth to a light
chop. Scattered showers.
.TUESDAY...West winds 5 to 10 knots, becoming west to northwest
and increasing to 10 to 15 knots. Seas 1 to 2 feet, except 2 to 3
feet west of Cosgrove Shoal Light. Nearshore waters smooth to a
light chop, becoming a light to moderate chop. Scattered showers.
.TUESDAY NIGHT...Northwest to north winds 10 to 15 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.
Scattered showers.

$$

GMZ052>055-072>075-041430-
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-
430 AM EDT Fri Apr 4 2025

...SMALL CRAFT ADVISORY IN EFFECT...

.TODAY...East to southeast winds 20 to 25 knots. Seas 5 to 8
feet, occasionally to 10 feet. Wave Detail: East to southeast 7
feet at 7 seconds.
.TONIGHT...East to southeast winds 20 to 25 knots. Seas 5 to
8 feet, occasionally to 10 feet. Wave Detail: East 8 feet at
7 seconds.
.SATURDAY...East to southeast winds 20 to 25 knots. Seas 5 to 8
feet, occasionally to 10 feet. Wave Detail: East to southeast 7
feet at 7 seconds.
.SATURDAY NIGHT...East to southeast winds 20 to 25 knots. Seas
5 to 8 feet, occasionally to 10 feet.
.SUNDAY...Southeast winds near 20 knots, decreasing to 15 to 20
knots. Seas 4 to 6 feet, occasionally to 8 feet. Isolated showers.
.SUNDAY NIGHT...Southeast winds near 15 knots, decreasing to 10
to 15 knots. Seas 3 to 4 feet, occasionally to 5 feet. Isolated
showers.
.MONDAY...Southeast to south winds 10 to 15 knots. Seas 2 to
3 feet. Isolated showers.
.MONDAY NIGHT...Southeast to south winds 5 to 10 knots, becoming
south to southwest and increasing to near 10 knots. Seas
2 to 3 feet. Scattered showers.
.TUESDAY AND TUESDAY NIGHT...Southwest to west winds 10 to 15
knots. Seas 2 to 4 feet, occasionally to 5 feet. Scattered
showers.

$$

GMZ033-034-041430-
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-
430 AM EDT Fri Apr 4 2025

...SMALL CRAFT ADVISORY IN EFFECT...

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

$$

AP