080
FZUS52 KKEY 170926
CWFKEY

Coastal Waters Forecast for the Florida Keys
National Weather Service Key West FL
426 AM EST Mon Nov 17 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.

GMZ005-172130-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
426 AM EST Mon Nov 17 2025

.SYNOPSIS...Weak high pressure will continue to promote light to
gentle breezes across the Florida Keys coastal waters today. Due
to the weak flow, there may be a period of variable breezes this
afternoon. Another high pressure system currently over the Midwest
U.S. will continue to drift eastward through Tuesday while slowly
strengthening. This will promote freshening northeast to east
breezes for mid week. This high will continue moving into the
western North Atlantic elongating and maintaining strength as it
does so. This will allow for continued moderate to fresh breezes
through late week.

The Approximate Shoreward Edge of the Gulf Stream as of November 14...

54 NM South of Dry Tortugas Light...on Loggerhead Key.
23 NM South of Cosgrove Shoal Light...off the Marquesas Keys.
19 NM South of Sand Key Light...off Key West.
17 NM South of Looe Key...off Big Pine Key.
15 NM Southeast of Sombrero Key Light...off Marathon.
 4 NM Southeast of Alligator Reef Light...off Islamorada.
 1 NM Southeast of Molasses Reef Light...off Key Largo.
 1 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.

$$

GMZ031-172130-
Florida Bay including Barnes Sound, Blackwater Sound, and
Buttonwood Sound-
426 AM EST Mon Nov 17 2025

.TODAY...Northwest to north winds 5 to 10 knots, becoming variable
and decreasing to near 5 knots. Bay waters smooth to a light
chop, becoming smooth.
.TONIGHT...Variable winds near 5 knots, becoming northeast after
midnight. Bay waters smooth.
.TUESDAY...Northeast to east winds 5 to 10 knots. Bay waters
smooth to a light chop.
.TUESDAY NIGHT...Northeast to east winds 5 to 10 knots. Bay
waters smooth to a light chop.
.WEDNESDAY...Northeast to east winds 5 to 10 knots, increasing to
near 10 knots. Bay waters smooth to a light chop, becoming a
light chop.
.WEDNESDAY NIGHT...Northeast to east winds 10 to 15 knots. Bay
waters a light to moderate chop.
.THURSDAY...Northeast to east winds near 10 knots, becoming east
and increasing to 10 to 15 knots. Bay waters a light chop,
becoming to light to moderate chop.
.THURSDAY NIGHT...Northeast to east winds 10 to 15 knots. Bay
waters a light to moderate chop.
.FRIDAY AND FRIDAY NIGHT...East winds 10 to 15 knots. Bay waters
a light to moderate chop.

$$

GMZ032-035-172130-
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-
426 AM EST Mon Nov 17 2025

.TODAY...North to northeast winds 5 to 10 knots, becoming
northeast this afternoon. Seas 1 foot or less, except around 1
foot west of the Marquesas Keys. Nearshore waters smooth to a
light chop.
.TONIGHT...North to northeast winds 5 to 10 knots, becoming
northeast to east after midnight. Seas 1 foot or less, except
around 1 foot west of the Marquesas Keys. Nearshore waters smooth
to a light chop.
.TUESDAY...Northeast to east winds near 10 knots. Seas around 1
foot, except 1 to 2 feet west of the Marquesas Keys. Nearshore
waters a light chop.
.TUESDAY NIGHT...Northeast to east winds near 10 knots. Seas
around 1 foot, except 1 to 2 feet west of the Marquesas Keys.
Nearshore waters a light chop.
.WEDNESDAY...Northeast to east winds near 10 knots. Seas around 1
foot, except 1 to 2 feet west of the Marquesas Keys. Nearshore
waters a light chop.
.WEDNESDAY NIGHT...Northeast to east winds 10 to 15 knots. Seas
1 to 2 feet, except building to 2 to 3 feet west of the Marquesas
Keys. Nearshore waters a light to moderate chop.
.THURSDAY...Northeast to east winds 10 to 15 knots, increasing to
near 15 knots. Seas 1 to 2 feet, except 2 to 3 feet west of the
Marquesas Keys. Nearshore waters a light to moderate chop,
becoming a moderate chop.
.THURSDAY NIGHT...Northeast to east winds near 15 knots. Seas 1
to 2 feet, except around 3 feet west of the Marquesas Keys.
Nearshore waters a moderate chop.
.FRIDAY AND FRIDAY NIGHT...East winds near 15 knots. Seas 1 to 2
feet, except around 3 feet west of the Marquesas Keys. Nearshore
waters a moderate chop.

$$

GMZ042>044-172130-
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-
426 AM EST Mon Nov 17 2025

.TODAY...Northwest to north winds 5 to 10 knots, becoming
northeast in the afternoon. Seas around 1 foot. Nearshore waters
smooth to a light chop.
.TONIGHT...Northeast to east winds 5 to 10 knots. Seas around 1
foot. Nearshore waters smooth to a light chop.
.TUESDAY...Northeast to east winds near 10 knots, increasing to 10
to 15 knots. Seas around 1 foot, building to 1 to 2 feet.
Nearshore waters a light chop, becoming a light to moderate chop.
.TUESDAY NIGHT...Northeast to east winds 10 to 15 knots. Seas
1 to 2 feet, except building to 2 to 3 feet west of Cosgrove
Shoal Light. Nearshore waters a light to moderate chop.
.WEDNESDAY...Northeast to east winds 10 to 15 knots. Seas 1 to
2 feet, except 2 to 3 feet west of Cosgrove Shoal Light.
Nearshore waters a light to moderate chop.
.WEDNESDAY NIGHT...Northeast to east winds 10 to 15 knots. Seas
1 to 2 feet, except 2 to 3 feet west of Cosgrove Shoal Light.
Nearshore waters a light to moderate chop.
.THURSDAY...Northeast to east winds near 15 knots. Seas 2 to
3 feet. Nearshore waters a moderate chop.
.THURSDAY NIGHT THROUGH FRIDAY NIGHT...East winds near 15 knots.
Seas around 3 feet. Nearshore waters a moderate chop.

$$

GMZ052>055-072>075-172130-
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-
426 AM EST Mon Nov 17 2025

.TODAY...Northwest to north winds 5 to 10 knots, becoming north to
northeast and increasing to near 10 knots in the afternoon. Seas
1 to 2 feet. Wave Detail: Northeast 1 foot at 3 seconds.
.TONIGHT...Northeast winds 10 to 15 knots, becoming northeast to
east and decreasing to near 10 knots after midnight. Seas around
2 feet, subsiding to 1 to 2 feet. Wave Detail: Northeast 2 feet at
3 seconds.
.TUESDAY...Northeast to east winds 10 to 15 knots. Seas 1 to
3 feet. Wave Detail: Northeast to east 2 feet at 4 seconds.
Isolated showers.
.TUESDAY NIGHT...East winds 10 to 15 knots. Seas 2 to 3 feet.
Isolated showers.
.WEDNESDAY...Northeast to east winds 10 to 15 knots. Seas 2 to
3 feet.
.WEDNESDAY NIGHT...Northeast to east winds near 15 knots,
increasing to 15 to 20 knots. Seas 2 to 4 feet, occasionally to 5
feet.
.THURSDAY...Northeast to east winds 15 to 20 knots. Seas 3 to 4
feet, occasionally to 5 feet.
.THURSDAY NIGHT...East winds 15 to 20 knots. Seas 3 to 5 feet,
occasionally to 6 feet. Isolated showers.
.FRIDAY...East winds near 15 knots. Seas 3 to 4 feet,
occasionally to 5 feet. Isolated showers.
.FRIDAY NIGHT...East winds near 15 knots. Seas 3 to 4 feet,
occasionally to 5 feet.

$$

GMZ033-034-172130-
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-
426 AM EST Mon Nov 17 2025

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

$$

MJV