686
FZUS52 KKEY 122027
CWFKEY

Coastal Waters Forecast for the Florida Keys
National Weather Service Key West FL
427 PM EDT Sat Apr 12 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.

GMZ005-130230-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
427 PM EDT Sat Apr 12 2025

.SYNOPSIS...An evening surge is expected tonight. Conditions for
Small Craft Advisory will be brief, beginning during the evening
and lasting through the overnight. High pressure will build in and
slide across the Southeast U.S. through the remainder of the
weekend into early next week. This will result in slackening
breezes while veering to the east. A reinforcing high pressure
arriving towards Thursday will lead to freshening breezes.

The Approximate Shoreward Edge of the Gulf Stream as of April 10...

22 NM South of Dry Tortugas Light...on Loggerhead Key.
 5 NM South of Cosgrove Shoal Light...off the Marquesas Keys.
 4 NM South of Sand Key Light...off Key West.
10 NM South of Looe Key...off Big Pine Key.
11 NM South of Sombrero Key Light...off Marathon.
 7 NM Southeast of Alligator Reef Light...off Islamorada.
 2 NM Southeast of Molasses Reef Light...off Key Largo.
 2 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.

$$

GMZ031-130230-
Florida Bay including Barnes Sound, Blackwater Sound, and
Buttonwood Sound-
427 PM EDT Sat Apr 12 2025

...SMALL CRAFT ADVISORY IN EFFECT...

.TONIGHT...Northwest to north winds 10 to 15 knots early,
increasing to near 20 knots in the late evening. Bay waters
a light to moderate chop, becoming rough.
.SUNDAY...North to northeast winds near 15 knots early, becoming
east 5 to 10 knots. Bay waters a moderate chop, becoming smooth
to a light chop.
.SUNDAY NIGHT...East to southeast winds near 10 knots. Bay waters
a light chop.
.MONDAY...East to southeast winds 10 to 15 knots. Bay waters a
light to moderate chop.
.MONDAY NIGHT...East winds 10 to 15 knots, decreasing to near 10
knots. Bay waters a light to moderate chop, becoming a light
chop.
.TUESDAY...Northeast to east winds 5 to 10 knots, becoming light
and variable. Bay waters smooth to a light chop, becoming smooth.
.TUESDAY NIGHT...Light and variable winds, becoming northwest
to north 5 to 10 knots. Bay waters smooth, becoming smooth to a
light chop.
.WEDNESDAY...Northwest to north winds 5 to 10 knots. Bay waters
smooth to a light chop.
.WEDNESDAY NIGHT...West to northwest winds 5 to 10 knots,
becoming north to northeast near 10 knots. Bay waters smooth to a
light chop, becoming a light chop.
.THURSDAY...Northeast to east winds 10 to 15 knots, increasing to
near 15 knots. Bay waters a light to moderate chop, becoming a
moderate chop.
.THURSDAY NIGHT...Northeast to east winds near 15 knots. Bay
waters a moderate chop.

$$

GMZ032-035-130230-
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-
427 PM EDT Sat Apr 12 2025

...SMALL CRAFT ADVISORY IN EFFECT...

.TONIGHT...Northwest to north winds near 15 knots early,
increasing to near 20 knots in the evening. Seas 2 to 4 feet,
occasionally to 5 feet. Nearshore waters a moderate chop, becoming
rough.
.SUNDAY...North winds near 15 knots early, becoming northeast to
east 5 to 10 knots. Seas 2 to 3 feet, subsiding to 1 to 2 feet in
the afternoon. Nearshore waters a moderate chop, becoming smooth
to a light chop.
.SUNDAY NIGHT...Northeast to east winds near 10 knots, becoming
east to southeast 10 to 15 knots. Seas 1 to 2 feet. Nearshore
waters a light chop, becoming a light to moderate chop.
.MONDAY...East to southeast winds 10 to 15 knots. Seas 1 to
2 feet. Nearshore waters a light to moderate chop.
.MONDAY NIGHT...East to southeast winds 10 to 15 knots, decreasing
to near 10 knots. Seas 1 to 2 feet. Nearshore waters a light to
moderate chop, becoming a light chop.
.TUESDAY...Northeast to east winds 5 to 10 knots, becoming
northwest to north in the afternoon. Seas 1 foot or less.
Nearshore waters smooth to a light chop.
.TUESDAY NIGHT...Northwest to north winds 5 to 10 knots. Seas
1 foot or less. Nearshore waters smooth to a light chop.
.WEDNESDAY...Northwest to north winds near 10 knots. Seas around 1
foot. Nearshore waters to a light chop.
.WEDNESDAY NIGHT...West to northwest winds near 10 knots,
becoming north to northeast 10 to 15 knots. Seas 1 to 2 feet.
Nearshore waters a light chop, becoming a light to moderate chop.
.THURSDAY...East winds near 15 knots. Seas building to 1 to 3
feet. Nearshore waters a moderate chop.
.THURSDAY NIGHT...Northeast to east winds 15 to 20 knots. Seas
building to 2 to 3 feet. Nearshore waters choppy.

$$

GMZ042-130230-
Hawk Channel from Ocean Reef to Craig Key out to the reef-
427 PM EDT Sat Apr 12 2025

...SMALL CRAFT ADVISORY IN EFFECT...

.TONIGHT...North winds near 10 knots early, becoming west to
northwest 10 to 15 knots, then becoming northwest near 20 knots in
the late evening. Seas 1 to 2 feet. Nearshore waters a light chop,
becoming a light to moderate chop, then becoming rough.
.SUNDAY...North to northeast winds near 15 knots early, becoming
east near 10 knots. Seas 1 to 2 feet. Nearshore waters a moderate
chop, becoming a light chop.
.SUNDAY NIGHT...East winds near 10 knots. Seas 1 to 2 feet.
Nearshore waters a light chop.
.MONDAY...East winds near 10 knots. Seas 1 to 2 feet. Nearshore
waters a light chop.
.MONDAY NIGHT...East to southeast winds 10 to 15 knots, decreasing
to near 10 knots. Seas 1 to 2 feet. Nearshore waters a light to
moderate chop, becoming a light chop.
.TUESDAY...East winds 5 to 10 knots, becoming light and variable.
Seas 1 to 2 feet. Nearshore waters smooth to a light chop,
becoming smooth.
.TUESDAY NIGHT...Light and variable winds, becoming northwest to
north near 10 knots. Seas around 1 foot. Nearshore waters smooth,
becoming a light chop.
.WEDNESDAY...Northwest to north winds near 10 knots, decreasing to
5 to 10 knots in the afternoon. Seas 1 foot or less. Nearshore
waters a light chop, becoming smooth to a light chop.
.WEDNESDAY NIGHT...Northwest winds 5 to 10 knots, becoming north
to northeast near 10 knots. Seas 1 foot or less. Nearshore waters
smooth to a light chop, becoming a light chop.
.THURSDAY...Northeast to east winds increasing to near 15 knots.
Seas 1 to 2 feet. Nearshore waters becoming a moderate chop.
.THURSDAY NIGHT...Northeast to east winds near 15 knots. Seas
2 to 3 feet. Nearshore waters a moderate chop.

$$

GMZ043-044-130230-
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-
427 PM EDT Sat Apr 12 2025

...SMALL CRAFT ADVISORY IN EFFECT...

.TONIGHT...Northwest to north winds near 15 knots early,
increasing to near 20 knots in the evening. Seas 2 to 3 feet,
except around 4 feet, occasionally to 5 feet west of Cosgrove
Shoal Light. Nearshore waters a moderate chop, becoming rough.
.SUNDAY...North winds near 15 knots early, becoming northeast 5
to 10 knots. Seas 1 to 2 feet, except 2 to 3 feet west of
Cosgrove Shoal Light. Nearshore waters a moderate chop, becoming
smooth to a light chop.
.SUNDAY NIGHT...Northeast to east winds 5 to 10 knots, becoming
east 10 to 15 knots. Seas 1 to 2 feet. Nearshore waters smooth to
a light chop, becoming a light to moderate chop.
.MONDAY...East to southeast winds 10 to 15 knots. Seas 2 to
3 feet. Nearshore waters a light to moderate chop.
.MONDAY NIGHT...East to southeast 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.
.TUESDAY...East winds 5 to 10 knots, becoming north to northeast
in the afternoon. Seas 1 to 2 feet. Nearshore waters smooth to a
light chop.
.TUESDAY NIGHT...North winds 5 to 10 knots, increasing to near 10
knots late. Seas around 1 foot. Nearshore waters smooth to a
light chop, becoming a light chop.
.WEDNESDAY...North winds near 10 knots, becoming northwest to
north to 5 to 10 knots. Seas around 1 foot. Nearshore waters a
light chop, becoming smooth to a light chop.
.WEDNESDAY NIGHT...Northwest winds 5 to 10 knots, becoming north
to northeast near 10 knots. Seas 1 to 2 feet. 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 3 feet. Nearshore waters a light to
moderate chop, becoming a moderate chop.
.THURSDAY NIGHT...Northeast to east winds 15 to 20 knots. Seas
2 to 3 feet. Nearshore waters choppy.

$$

GMZ052-072-130230-
Straits of Florida from Ocean Reef to Craig Key out 20 NM-
Straits of Florida from Ocean Reef to Craig Key 20 to 60 NM out-
427 PM EDT Sat Apr 12 2025

...SMALL CRAFT ADVISORY IN EFFECT...

.TONIGHT...Northwest to north winds near 10 knots early, becoming
west to northwest 10 to 15 knots, then becoming northwest to
north near 20 knots late this evening and overnight. Seas 2 to 4
feet, occasionally to 5 feet. Wave Detail: Northwest to north 2
feet at 5 seconds.
.SUNDAY...North to northeast winds near 15 knots early, becoming
east near 10 knots. Seas 2 to 4 feet, occasionally to 5 feet.
Wave Detail: Northeast to east 2 feet at 3 seconds and northwest
2 feet at 4 seconds.
.SUNDAY NIGHT...East winds 10 to 15 knots. Seas 2 to 3 feet. Wave
Detail: Northeast to east 3 feet at 4 seconds and north to
northeast 1 foot at 7 seconds.
.MONDAY...East winds 10 to 15 knots. Seas 2 to 3 feet.
.MONDAY NIGHT...East winds 10 to 15 knots. Seas 2 to 3 feet.
.TUESDAY...East winds near 10 knots, becoming variable 5 to 10
knots. Seas subsiding to 1 to 2 feet.
.TUESDAY NIGHT...Variable winds near 5 knots, becoming northwest
5 to 10 knots. Seas around 1 foot.
.WEDNESDAY...Northwest to north winds near 10 knots, becoming
north to northeast 5 to 10 knots. Seas 1 to 2 feet.
.WEDNESDAY NIGHT...North to northeast winds 5 to 10 knots,
increasing to near 10 knots. Seas 1 to 2 feet.
.THURSDAY...Northeast to east winds increasing to near 15 knots.
Seas 2 to 4 feet, occasionally to 5 feet.
.THURSDAY NIGHT...Northeast to east winds 15 to 20 knots. Seas
3 to 5 feet, occasionally to 6 feet.

$$

GMZ053>055-073>075-130230-
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 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-
427 PM EDT Sat Apr 12 2025

...SMALL CRAFT ADVISORY IN EFFECT...

.TONIGHT...Northwest to north winds 15 to 20 knots, increasing to
near 20 knots in the evening. Seas 3 to 4 feet, occasionally to 5
feet. Wave Detail: Northwest to north 4 feet at 5 seconds.
.SUNDAY...North to northeast winds near 15 knots, becoming
northeast to east 5 to 10 knots. Seas 2 to 4 feet, occasionally
to 5 feet. Wave Detail: Northwest to north 3 feet at 6 seconds.
.SUNDAY NIGHT...Northeast to east winds near 10 knots, becoming
east 10 to 15 knots. Seas 2 to 3 feet. Wave Detail: East 3 feet
at 5 seconds and northwest 2 feet at 6 seconds.
.MONDAY...East winds 10 to 15 knots. Seas 3 to 4 feet,
occasionally to 5 feet.
.MONDAY NIGHT...East winds near 15 knots, decreasing to 10 to 15
knots. Seas 2 to 4 feet, occasionally to 5 feet.
.TUESDAY...East winds near 10 knots, becoming north to northeast 5
to 10 knots. Seas subsiding to 1 to 2 feet.
.TUESDAY NIGHT...North to northeast winds 5 to 10 knots,
increasing to near 10 knots late. Seas 1 to 2 feet.
.WEDNESDAY...North to northeast winds near 10 knots, decreasing to
5 to 10 knots. Seas 1 to 2 feet.
.WEDNESDAY NIGHT...Northwest to north winds 5 to 10 knots,
becoming north to northeast 10 to 15 knots. Seas 1 to 2 feet.
.THURSDAY...Northeast to east winds 10 to 15 knots. Seas 2 to
3 feet.
.THURSDAY NIGHT...Northeast to east winds increasing to 15 to 20
knots. Seas 3 to 5 feet, occasionally to 6 feet.

$$

GMZ033-034-130230-
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-
427 PM EDT Sat Apr 12 2025

...SMALL CRAFT ADVISORY IN EFFECT...

.TONIGHT...Northwest to north winds 15 to 20 knots early,
increasing to near 20 knots. Seas 4 to 5 feet, occasionally to 6
feet. Wave Detail: Northwest 4 feet at 6 seconds.
.SUNDAY...North to northeast winds near 15 knots early, becoming
north 5 to 10 knots. Seas 2 to 4 feet, occasionally to 5 feet.
Wave Detail: Northwest to north 3 feet at 6 seconds.
.SUNDAY NIGHT...North to northeast winds 5 to 10 knots, becoming
east near 10 knots. Seas around 2 feet. Wave Detail: Northwest 2
feet at 6 seconds and east 1 foot at 2 seconds.
.MONDAY...East to southeast winds 10 to 15 knots. Seas 1 to
2 feet.
.MONDAY NIGHT...East to southeast winds 10 to 15 knots, decreasing
to near 10 knots late. Seas 1 to 2 feet.
.TUESDAY...East winds 5 to 10 knots, becoming northwest to north
in the afternoon. Seas 1 to 2 feet.
.TUESDAY NIGHT...Northwest to north winds increasing to near 10
knots. Seas around 1 foot.
.WEDNESDAY...North winds near 10 knots. Seas around 1 foot.
.WEDNESDAY NIGHT...Northwest winds 10 to 15 knots, becoming north
to northeast. Seas 1 to 2 feet.
.THURSDAY...Northeast to east winds 10 to 15 knots, becoming east
near 10 knots. Seas 2 to 3 feet.
.THURSDAY NIGHT...East winds 10 to 15 knots, becoming northeast
to east 15 to 20 knots. Seas 2 to 3 feet.

$$