770
FZUS52 KKEY 031417
CWFKEY

Coastal Waters Forecast for the Florida Keys
National Weather Service Key West FL
1017 AM EDT Thu Apr 3 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.

GMZ005-032030-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
1017 AM EDT Thu Apr 3 2025

.SYNOPSIS...Sprawling high pressure remains entrenched across the
North Atlantic for the next several days with some minor
fluctuations in strength. As a result, expect a very healthy
pressure gradient leading to fresh to strong east to southeasterly
breezes across the Florida Keys marine zones. Fresh to strong
breezes are expected through Sunday morning, when a low pressure
system develops over the eastern United States. Shower chances
will remain near nil until next week, and a frontal passage may
occur sometime around Monday to Tuesday.

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.

$$

GMZ031-032030-
Florida Bay including Barnes Sound, Blackwater Sound, and
Buttonwood Sound-
1017 AM EDT Thu Apr 3 2025

...SMALL CRAFT ADVISORY IN EFFECT...

.THIS AFTERNOON...East to southeast winds 20 to 25 knots. Bay
waters very rough. Isolated showers.
.TONIGHT...East to southeast winds 20 to 25 knots. Bay waters
very rough.
.FRIDAY...East to southeast winds 20 to 25 knots. Bay waters very
rough.
.FRIDAY NIGHT...East to southeast winds 20 to 25 knots. Bay
waters very rough.
.SATURDAY...East to southeast winds 20 to 25 knots, decreasing to
near 20 knots. Bay waters very rough, becoming rough.
.SATURDAY NIGHT...East to southeast winds near 20 knots. Bay
waters rough.
.SUNDAY...Southeast winds 15 to 20 knots, decreasing to near 15
knots in the afternoon. Bay waters choppy, becoming a moderate
chop.
.SUNDAY NIGHT...Southeast winds near 15 knots. Bay waters a moderate
chop. Isolated showers.
.MONDAY...Southeast to south winds near 15 knots, decreasing to
near 10 knots. Bay waters a moderate chop, becoming a light chop.
Isolated showers.
.MONDAY NIGHT...Southeast to south winds 5 to 10 knots. Bay
waters smooth to a light chop. Isolated showers.

$$

GMZ032-035-032030-
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-
1017 AM EDT Thu Apr 3 2025

...SMALL CRAFT ADVISORY IN EFFECT...

.THIS AFTERNOON...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...East to southeast winds near 25 knots. Seas 2 to 4
feet, occasionally to 5 feet, except 4 to 6 feet, occasionally to
8 feet west of the Marquesas Keys. Nearshore waters extremely
rough.
.FRIDAY...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.
.FRIDAY NIGHT...East to southeast winds 20 to 25 knots. Seas 2 to
3 feet, except 5 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, becoming
southeast and 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 near 15
knots in the afternoon. Seas 2 to 3 feet, except 3 to 5 feet,
occasionally to 6 feet west of the Marquesas Keys. Nearshore
waters rough, becoming a moderate chop. Isolated showers.
.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 1 to 3 feet, subsiding to 1 to 2 feet.
Nearshore waters a light to moderate chop, becoming a light chop.
Isolated showers.
.MONDAY NIGHT...Southeast to south winds 5 to 10 knots. Seas
1 to 2 feet. Nearshore waters smooth to a light chop. Isolated
showers.

$$

GMZ042>044-032030-
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-
1017 AM EDT Thu Apr 3 2025

...SMALL CRAFT ADVISORY IN EFFECT...

.THIS AFTERNOON...East to southeast winds 20 to 25 knots. Seas 4
to 6 feet, occasionally to 8 feet. Nearshore waters very rough.
.TONIGHT...East to southeast winds near 25 knots. Seas 5 to 7
feet, occasionally to 9 feet. Nearshore waters extremely rough.
.FRIDAY THROUGH SATURDAY...East to southeast winds 20 to 25
knots. Seas 5 to 7 feet, occasionally to 9 feet. Nearshore waters
very rough.
.SATURDAY NIGHT...East to southeast winds 20 to 25 knots, becoming
southeast and decreasing to near 20 knots. Seas 4 to 6 feet,
occasionally to 8 feet. Nearshore waters very rough, becoming
rough.
.SUNDAY...Southeast winds near 20 knots, decreasing to near 15
knots. Seas 4 to 6 feet, occasionally to 8 feet, subsiding to 3
to 4 feet, occasionally to 5 feet. Nearshore waters rough,
becoming choppy. Isolated showers.
.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
near 10 knots. Seas 2 to 3 feet, subsiding to 1 to 2 feet.
Nearshore waters a light to moderate chop, becoming a light chop.
Isolated showers.
.MONDAY NIGHT...Southeast to south winds 5 to 10 knots. Seas 1 to
2 feet. Nearshore waters smooth to a light chop. Isolated
showers.

$$

GMZ052>055-072>075-032030-
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-
1017 AM EDT Thu Apr 3 2025

...SMALL CRAFT ADVISORY IN EFFECT...

.THIS AFTERNOON...East to southeast winds 20 to 25 knots. Seas 6
to 9 feet, occasionally to 11 feet. Wave Detail: East 8 feet at 7
seconds.
.TONIGHT...East to southeast winds near 25 knots. Seas 7 to 10
feet, occasionally to 13 feet. Wave Detail: East 9 feet at 7
seconds. Isolated showers.
.FRIDAY...East to southeast winds 20 to 25 knots. Seas 6 to
9 feet, occasionally to 11 feet. Wave Detail: East to southeast 8
feet at 7 seconds. Isolated showers.
.FRIDAY NIGHT...East to southeast winds near 25 knots. Seas 7 to
10 feet, occasionally to 13 feet. Isolated showers.
.SATURDAY...East to southeast winds 20 to 25 knots. Seas 6 to
9 feet, occasionally to 11 feet. Isolated showers.
.SATURDAY NIGHT...East to southeast winds 20 to 25 knots, becoming
southeast and decreasing to near 20 knots. Seas 5 to 8 feet,
occasionally to 10 feet. Isolated showers.
.SUNDAY...Southeast winds near 20 knots, decreasing to near 15
knots. Seas 5 to 7 feet, occasionally to 9 feet, subsiding to 3
to 5 feet, occasionally to 6 feet. Isolated showers.
.SUNDAY NIGHT...Southeast winds near 15 knots. Seas 3 to 4 feet,
occasionally to 5 feet. Isolated showers.
.MONDAY...Southeast to south winds near 15 knots, decreasing to
near 10 knots. Seas 2 to 4 feet, occasionally to 5 feet,
subsiding to 2 to 3 feet. Isolated showers.
.MONDAY NIGHT...Southeast to south winds 5 to 10 knots. Seas
around 2 feet. Isolated showers.

$$

GMZ033-034-032030-
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-
1017 AM EDT Thu Apr 3 2025

...SMALL CRAFT ADVISORY IN EFFECT...

.THIS AFTERNOON...East to southeast winds 20 to 25 knots. Seas 4
to 6 feet, occasionally to 8 feet. Wave Detail: East to southeast
4 feet at 4 seconds.
.TONIGHT...East to southeast winds 20 to 25 knots. Seas 5 to
7 feet, occasionally to 9 feet. Wave Detail: East to southeast 5
feet at 5 seconds.
.FRIDAY...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.
.FRIDAY NIGHT...East to southeast winds 20 to 25 knots. Seas 5 to
7 feet, occasionally to 9 feet.
.SATURDAY...East to southeast winds near 20 knots. Seas 5 to 7
feet, occasionally to 9 feet.
.SATURDAY NIGHT...East to southeast winds near 20 knots, becoming
southeast. Seas 4 to 6 feet, occasionally to 8 feet.
.SUNDAY...Southeast winds near 20 knots, decreasing to near 15
knots. Seas 3 to 5 feet, occasionally to 6 feet, subsiding to 2
to 4 feet, occasionally to 5 feet.
.SUNDAY NIGHT...Southeast winds 10 to 15 knots. Seas 2 to 3 feet.
.MONDAY...Southeast to south winds 10 to 15 knots, becoming south
and decreasing to 5 to 10 knots. Seas 1 to 3 feet, subsiding to 1
to 2 feet. Isolated showers.
.MONDAY NIGHT...South to southwest winds near 5 knots. Seas 1 to
2 feet. Scattered showers.

$$