795
FZUS52 KKEY 152025
CWFKEY

Coastal Waters Forecast for the Florida Keys
National Weather Service Key West FL
425 PM EDT Wed Oct 15 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.

GMZ005-160830-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
425 PM EDT Wed Oct 15 2025

.SYNOPSIS...High pressure will prevail over the area, and will
maintain moderate northeasterly breezes through Thursday. Expect
a tighter pressure gradient to develop Thursday night, and fresh
breezes are possible through the first half of the weekend. Drier
air pushing south from the eastern CONUS will keep shower coverage
at isolated to low-end scattered levels.

The Approximate Shoreward Edge of the Gulf Stream as of October
15...

63 NM South of Dry Tortugas Light...on Loggerhead Key.
42 NM South of Cosgrove Shoal Light...off the Marquesas Keys.
33 NM South of Sand Key Light...off Key West.
23 NM South of Looe Key...off Big Pine Key.
16 NM Southeast of Sombrero Key Light...off Marathon.
22 NM Southeast of Alligator Reef Light...off Islamorada.
20 NM Southeast of Molasses Reef Light...off Key Largo.
18 NM Southeast 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.

$$

GMZ031-160830-
Florida Bay including Barnes Sound, Blackwater Sound, and
Buttonwood Sound-
425 PM EDT Wed Oct 15 2025

.TONIGHT...North to northeast winds near 10 knots. Bay waters a
light chop. Isolated showers.
.THURSDAY AND THURSDAY NIGHT...Northeast winds 10 to 15 knots.
Bay waters a light to moderate chop. Isolated showers.
.FRIDAY...Northeast to east winds near 15 knots, increasing to 15
to 20 knots. Bay waters a moderate chop, becoming choppy.
Isolated showers.
.FRIDAY NIGHT...Northeast to east winds 15 to 20 knots. Bay
waters choppy. Isolated showers.
.SATURDAY...East winds 15 to 20 knots. Bay waters choppy.
Isolated showers.
.SATURDAY NIGHT...East winds 15 to 20 knots, decreasing to near
15 knots. Bay waters choppy, becoming a moderate chop. Isolated
showers.
.SUNDAY...East to southeast winds near 15 knots, decreasing to 10
to 15 knots. Bay waters a moderate chop, becoming a light to
moderate chop. Scattered showers.
.SUNDAY NIGHT...Southeast winds near 10 knots. Bay waters a light
chop. Scattered showers.
.MONDAY...East to southeast winds near 5 knots, becoming northeast
to east. Bay waters smooth. Scattered showers.
.MONDAY NIGHT...Northeast to east winds 5 to 10 knots. Bay waters
smooth to a light chop. Isolated showers.

$$

GMZ032-035-160830-
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-
425 PM EDT Wed Oct 15 2025

.TONIGHT...Northeast winds 10 to 15 knots. Seas 1 to 2 feet,
except around 2 feet west of the Marquesas Keys. Nearshore waters
a light chop, becoming a light to moderate chop. Isolated showers.
.THURSDAY...Northeast winds 10 to 15 knots. Seas 1 to 2 feet, except
around 2 feet west of the Marquesas Keys. Nearshore waters a
light to moderate chop. Isolated showers.
.THURSDAY NIGHT...Northeast winds 10 to 15 knots, increasing to
near 15 knots. Seas 1 to 2 feet, except around 2 feet west of the
Marquesas Keys. Nearshore waters a light to moderate chop,
becoming a moderate chop. Scattered showers.
.FRIDAY...Northeast to east winds 15 to 20 knots. Seas building to
2 to 3 feet, except building to 3 to 4 feet, occasionally to 5
feet west of the Marquesas Keys. Nearshore waters choppy.
Isolated showers.
.FRIDAY NIGHT...Northeast to east winds 15 to 20 knots. Seas 2 to
3 feet, except 3 to 4 feet, occasionally to 5 feet west of the
Marquesas Keys. Nearshore waters choppy. Isolated showers.
.SATURDAY...East winds 15 to 20 knots. Seas 2 to 3 feet, except 3
to 4 feet, occasionally to 5 feet west of the Marquesas Keys.
Nearshore waters choppy. Isolated showers.
.SATURDAY NIGHT...East winds 15 to 20 knots. Seas 2 to 3 feet, except
3 to 4 feet, occasionally to 5 feet west of the Marquesas Keys.
Nearshore waters choppy. Scattered showers.
.SUNDAY...East to 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. Scattered showers.
.SUNDAY NIGHT...East to southeast winds near 10 knots. Seas 1 to 2
feet, decreasing to around 1 foot. Nearshore waters a light chop.
Scattered showers.
.MONDAY...East to southeast winds near 5 knots, becoming northeast
to east. Seas around 1 foot. Nearshore waters smooth. Scattered
showers.
.MONDAY NIGHT...Northeast winds 5 to 10 knots. Seas around 1 foot.
Nearshore waters smooth to a light chop. Isolated showers.

$$

GMZ042>044-160830-
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-
425 PM EDT Wed Oct 15 2025

.TONIGHT...Northeast winds 10 to 15 knots. Seas around 2 feet.
Nearshore waters a light to moderate chop. Isolated showers.
.THURSDAY...Northeast winds 10 to 15 knots. Seas around 2 feet.
Nearshore waters a light to moderate chop. Isolated showers.
.THURSDAY NIGHT...Northeast winds 10 to 15 knots, increasing to
near 15 knots. Seas around 2 feet, building to 2 to 3 feet.
Nearshore waters a light to moderate chop, becoming a moderate
chop. Scattered showers.
.FRIDAY...Northeast to east winds 15 to 20 knots. Seas 2 to 4
feet, occasionally to 5 feet. Nearshore waters choppy. Scattered
showers.
.FRIDAY NIGHT...Northeast to east winds 15 to 20 knots. Seas 3 to
4 feet, occasionally to 5 feet. Nearshore waters choppy.
Scattered showers.
.SATURDAY...East winds 15 to 20 knots. Seas 2 to 4 feet,
occasionally to 5 feet. Nearshore waters choppy. Isolated
showers.
.SATURDAY NIGHT...East to southeast winds 15 to 20 knots. Seas
3 to 4 feet, occasionally to 5 feet. Nearshore waters choppy.
Scattered showers.
.SUNDAY...Southeast 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. Scattered showers.
.SUNDAY NIGHT...Southeast winds 10 to 15 knots. Seas around 2
feet. Nearshore waters a light to moderate chop. Scattered
showers.
.MONDAY...East to southeast winds near 5 knots, becoming northeast
to east. Seas 1 to 2 feet. Nearshore waters smooth. Scattered
showers.
.MONDAY NIGHT...Northeast to east winds 5 to 10 knots. Seas 1 to 2
feet. Nearshore waters smooth to a light chop. Isolated showers.

$$

GMZ052>055-072>075-160830-
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-
425 PM EDT Wed Oct 15 2025

.TONIGHT...Northeast winds 10 to 15 knots. Seas 2 to 4 feet,
occasionally to 5 feet. Wave Detail: Northeast 4 feet at
6 seconds. Isolated showers.
.THURSDAY...Northeast winds 10 to 15 knots. Seas 2 to 3 feet.
Wave Detail: Northeast 3 feet at 5 seconds. Isolated showers.
.THURSDAY NIGHT...Northeast to east winds 10 to 15 knots,
increasing to near 15 knots. Seas 2 to 4 feet, occasionally to 5
feet. Wave Detail: Northeast to east 4 feet at 5 seconds.
Scattered showers.
.FRIDAY...Northeast to east winds 15 to 20 knots. Seas 3 to
5 feet, occasionally to 6 feet. Scattered showers.
.FRIDAY NIGHT...Northeast to east winds 15 to 20 knots. Seas 4 to
6 feet, occasionally to 8 feet. Scattered showers.
.SATURDAY...East winds to southeast 15 to 20 knots. Seas 4 to 6
feet, occasionally to 8 feet. Scattered showers.
.SATURDAY NIGHT...East winds to southeast 15 to 20
knots. Seas 4 to 6 feet, occasionally to 8 feet. Scattered
showers.
.SUNDAY...East to southeast winds near 15 knots, decreasing to 10
to 15 knots. Seas 2 to 4 feet, occasionally to 5 feet. Scattered
showers.
.SUNDAY NIGHT...Southeast winds 10 to 15 knots, decreasing to near
10 knots. Seas 2 to 3 feet, subsiding to 1 to 2 feet. Scattered
showers.
.MONDAY...East winds 5 to 10 knots, becoming northeast to east.
Seas 1 to 2 feet. Scattered showers.
.MONDAY NIGHT...Northeast to east winds 5 to 10 knots. Seas 1 to
2 feet. Scattered showers.

$$

GMZ033-034-160830-
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-
425 PM EDT Wed Oct 15 2025

.TONIGHT...Northeast winds 10 to 15 knots. Seas 2 to 3 feet. Wave
Detail: Northeast 2 feet at 4 seconds.
.THURSDAY...Northeast winds 10 to 15 knots. Seas 2 to 3 feet.
Wave Detail: Northeast 3 feet at 5 seconds. Isolated showers.
.THURSDAY NIGHT...Northeast to east winds 10 to 15 knots,
increasing to 15 to 20 knots. Seas 2 to 3 feet. Wave Detail:
Northeast to east 3 feet at 4 seconds. Isolated showers.
.FRIDAY...Northeast to east winds 15 to 20 knots. Seas 2 to
4 feet, occasionally to 5 feet. Isolated showers.
.FRIDAY NIGHT...East winds 15 to 20 knots. Seas 3 to 5 feet,
occasionally to 6 feet. Isolated showers.
.SATURDAY...East winds 15 to 20 knots. Seas 3 to 4 feet,
occasionally to 5 feet. Isolated showers.
.SATURDAY NIGHT...East to southeast winds 15 to 20 knots. Seas
3 to 4 feet, occasionally to 5 feet. Scattered showers.
.SUNDAY...Southeast winds 10 to 15 knots, decreasing to near 10
knots. Seas 2 to 4 feet, occasionally to 5 feet, subsiding to 2 to
3 feet. Scattered showers.
.SUNDAY NIGHT...Southeast winds 5 to 10 knots. Seas 1 to 2 feet.
Scattered showers.
.MONDAY...East to southeast winds near 5 knots, becoming
northeast to east. Seas 1 to 2 feet. Scattered showers.
.MONDAY NIGHT...Northeast winds 5 to 10 knots. Seas 1 to 2 feet.
Isolated showers.

$$

DP