919
FZUS52 KKEY 170235
CWFKEY

Coastal Waters Forecast for the Florida Keys
National Weather Service Key West FL
1035 PM EDT Wed Apr 16 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.

GMZ005-170845-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
1035 PM EDT Wed Apr 16 2025

.SYNOPSIS...The tail end of a decaying cold front will brush
through the Florida Keys coastal waters this evening. Northwest to
north breezes will freshen slightly as the front passes through.
On Thursday, high pressure will rebuild and expand across the
Florida Keys. Fresh to strong easterly breezes are expected as
early as Thursday night, and these enhanced breezes will continue
into the weekend.

The Approximate Shoreward Edge of the Gulf Stream as of April 16...

30 NM South of Dry Tortugas Light...on Loggerhead Key.
 8 NM South of Cosgrove Shoal Light...off the Marquesas Keys.
 5 NM South of Sand Key Light...off Key West.
 9 NM South of Looe Key...off Big Pine Key.
13 NM South of Sombrero Key Light...off Marathon.
15 NM Southeast of Alligator Reef Light...off Islamorada.
14 NM Southeast of Molasses Reef Light...off Key Largo.
12 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.

$$

GMZ031-170845-
Florida Bay including Barnes Sound, Blackwater Sound, and
Buttonwood Sound-
1035 PM EDT Wed Apr 16 2025

.OVERNIGHT...West winds near 5 knots, becoming north to northeast
5 to 10 knots. Bay waters smooth, becoming smooth to a light
chop.
.THURSDAY...Northeast to east winds near 10 knots, becoming east
near 15 knots in the afternoon. Bay waters a light chop, becoming
a moderate chop.
.THURSDAY NIGHT...Northeast to east winds 15 to 20 knots. Bay
waters choppy.
.FRIDAY...East winds near 20 knots. Bay waters rough.
.FRIDAY NIGHT...East winds near 20 knots. Bay waters rough.
.SATURDAY...East winds 20 to 25 knots. Bay waters very rough.
Isolated showers.
.SATURDAY NIGHT...East winds 20 to 25 knots. Bay waters very
rough. Isolated showers.
.SUNDAY...East to southeast winds near 20 knots. Bay waters
rough. Isolated showers.
.SUNDAY NIGHT...East to southeast winds near 20 knots. Bay waters
rough. Isolated showers.
.MONDAY...East to southeast winds 15 to 20 knots, decreasing to
near 15 knots. Bay waters choppy, becoming a moderate chop.
Isolated showers.
.MONDAY NIGHT...East to southeast winds near 15 knots. Bay waters
a moderate chop. Isolated showers.

$$

GMZ032-035-170845-
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-
1035 PM EDT Wed Apr 16 2025

.OVERNIGHT...Northwest winds 5 to 10 knots, becoming north to
northeast late. Seas 1 foot or less, building to around 1 foot,
except building to 1 to 2 feet west of the Marquesas Keys.
Nearshore waters smooth to a light chop.
.THURSDAY...Northeast to east winds near 10 knots, becoming east
near 15 knots in the afternoon. Seas 1 to 2 feet. Nearshore
waters a light chop, becoming a moderate chop.
.THURSDAY NIGHT...Northeast to east winds 15 to 20 knots. Seas
building to 2 to 3 feet. Nearshore waters choppy.
.FRIDAY...East winds near 20 knots. Seas 2 to 3 feet, except
around 4 feet, occasionally to 5 feet west of the Marquesas Keys.
Nearshore waters rough.
.FRIDAY NIGHT AND SATURDAY...East winds 20 to 25 knots. Seas 2 to
4 feet, except 4 to 5 feet, occasionally to 6 feet west of the
Marquesas Keys. Nearshore waters very rough. Isolated showers.
.SATURDAY NIGHT...East to southeast winds 20 to 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 very rough. Isolated showers.
.SUNDAY AND SUNDAY NIGHT...East to southeast winds near 20 knots.
Seas 2 to 3 feet, except 4 to 5 feet, occasionally to 6 feet west
of the Marquesas Keys. Nearshore waters rough. Isolated showers.
.MONDAY...East to southeast winds 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 choppy. Isolated showers.
.MONDAY NIGHT...East to southeast winds 15 to 20 knots. Seas 1 to
2 feet, except 3 to 4 feet, occasionally to 5 feet west of the
Marquesas Keys. Nearshore waters choppy. Isolated showers.

$$

GMZ042>044-170845-
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-
1035 PM EDT Wed Apr 16 2025

.OVERNIGHT...West to northwest winds 5 to 10 knots, becoming
north to northeast near 10 knots. Seas 1 foot or less, building to
around 1 foot, except building to 1 to 2 feet west of Cosgrove
Shoal Light. Nearshore waters smooth to a light chop, becoming a
light chop.
.THURSDAY...Northeast to east winds 10 to 15 knots, increasing to
near 15 knots. Seas 1 to 2 feet, building to 2 to 3 feet.
Nearshore waters a light to moderate chop, becoming a moderate
chop.
.THURSDAY NIGHT...Northeast to east winds 15 to 20 knots,
increasing to near 20 knots. Seas 2 to 4 feet, occasionally to 5
feet. Nearshore waters choppy, becoming rough.
.FRIDAY...East winds 20 to 25 knots. Seas 3 to 5 feet,
occasionally to 6 feet. Nearshore waters very rough.
.FRIDAY NIGHT...East winds 20 to 25 knots. Seas 3 to 5 feet,
occasionally to 6 feet, except 4 to 6 feet, occasionally to
8 feet west of Cosgrove Shoal Light. Nearshore waters very rough.
Isolated showers.
.SATURDAY...East winds 20 to 25 knots. Seas 4 to 6 feet,
occasionally to 8 feet. Nearshore waters very rough. Isolated
showers.
.SATURDAY NIGHT...East winds 20 to 25 knots. Seas 4 to 6 feet,
occasionally to 8 feet. Nearshore waters very rough. Isolated
showers.
.SUNDAY...East to southeast winds 20 to 25 knots. Seas 4 to 6
feet, occasionally to 8 feet. Nearshore waters very rough.
Isolated showers.
.SUNDAY NIGHT...East to southeast winds near 20 knots. Seas 4 to
6 feet, occasionally to 8 feet. Nearshore waters rough. Isolated
showers.
.MONDAY...East to southeast winds 15 to 20 knots. Seas 3 to
5 feet, occasionally to 6 feet. Nearshore waters choppy. Isolated
showers.
.MONDAY NIGHT...East to southeast winds 15 to 20 knots. Seas 2 to
4 feet, occasionally to 5 feet. Nearshore waters choppy. Isolated
showers.

$$

GMZ052>055-072>075-170845-
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-
1035 PM EDT Wed Apr 16 2025

.OVERNIGHT...Northwest to north winds 5 to 10 knots, becoming
northeast near 10 knots. Seas 1 to 2 feet. Wave Detail:
Northeast 1 foot at 4 seconds.
.THURSDAY...Northeast to east winds 10 to 15 knots, increasing to
near 15 knots. Seas 2 to 3 feet, building to 3 to 5 feet,
occasionally to 6 feet in the afternoon. Wave Detail: North to
northeast 2 feet at 5 seconds, becoming northeast to east 4 feet
at 5 seconds and northwest to north 2 feet at 6 seconds.
.THURSDAY NIGHT...Northeast to east winds 15 to 20 knots,
increasing to near 20 knots. Seas 4 to 5 feet, occasionally to 6
feet, building to 5 to 7 feet, occasionally to 9 feet after
midnight. Wave Detail: Northeast to east 4 feet at 5 seconds and
northwest to north 1 foot at 6 seconds, becoming northeast to east
5 feet at 6 seconds.
.FRIDAY...East winds 20 to 25 knots. Seas 6 to 8 feet,
occasionally to 10 feet.
.FRIDAY NIGHT...East winds 20 to 25 knots. Seas 6 to 9 feet,
occasionally to 11 feet. Isolated showers.
.SATURDAY...East winds 20 to 25 knots. Seas 7 to 10 feet,
occasionally to 13 feet. Isolated showers.
.SATURDAY NIGHT...East winds 20 to 25 knots. Seas 7 to 10 feet,
occasionally to 13 feet. Isolated showers.
.SUNDAY...East to southeast winds 20 to 25 knots. Seas 6 to
9 feet, occasionally to 11 feet. Isolated showers.
.SUNDAY NIGHT...East to southeast winds 20 to 25 knots. Seas 5 to
8 feet, occasionally to 10 feet. Isolated showers.
.MONDAY...East to southeast winds near 20 knots, decreasing to 15
to 20 knots. Seas 5 to 8 feet, occasionally to 10 feet, subsiding
to 4 to 6 feet, occasionally to 8 feet in the afternoon. Isolated
showers.
.MONDAY NIGHT...East to southeast winds 15 to 20 knots. Seas 4 to
6 feet, occasionally to 8 feet. Isolated showers.

$$

GMZ033-034-170845-
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-
1035 PM EDT Wed Apr 16 2025

.OVERNIGHT...Northwest to north winds 10 to 15 knots, becoming
north to northeast near 10 knots late. Seas 1 to 2 feet, building
to 2 to 3 feet. Wave Detail: Northwest to north 3 feet at 5
seconds.
.THURSDAY...East winds 10 to 15 knots. Seas around 2 feet. Wave
Detail: Northwest to north 2 feet at 6 seconds and east 1 foot at
3 seconds.
.THURSDAY NIGHT...East winds 10 to 15 knots, increasing to 15 to
20 knots. Seas 2 to 3 feet. Wave Detail: East 3 feet at 4 seconds
and northwest to north 2 feet at 5 seconds.
.FRIDAY...East winds 15 to 20 knots. Seas 3 to 4 feet,
occasionally to 5 feet.
.FRIDAY NIGHT...East winds near 20 knots. Seas 4 to 6 feet,
occasionally to 8 feet.
.SATURDAY...East winds 20 to 25 knots. Seas 4 to 6 feet,
occasionally to 8 feet. Isolated showers.
.SATURDAY NIGHT...East to southeast winds 20 to 25 knots. Seas
4 to 6 feet, occasionally to 8 feet.
.SUNDAY...East to southeast winds near 20 knots. Seas 4 to
6 feet, occasionally to 8 feet. Isolated showers.
.SUNDAY NIGHT...East to southeast winds near 20 knots. Seas 3 to
5 feet, occasionally to 6 feet. Isolated showers.
.MONDAY...East to southeast winds 15 to 20 knots. Seas 3 to
5 feet, occasionally to 6 feet. Isolated showers.
.MONDAY NIGHT...East to southeast winds 15 to 20 knots. Seas 2 to
4 feet, occasionally to 5 feet. Isolated showers.

$$