FZUS52 KKEY 230829
CWFKEY
Coastal Waters Forecast for the Florida Keys
National Weather Service Key West FL
429 AM EDT Thu Apr 23 2026
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.
GMZ005-232030-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
429 AM EDT Thu Apr 23 2026
.SYNOPSIS...High pressure over the western North Atlantic will
maintain moderate to fresh easterly breezes early this morning
before slackening to mainly moderate breezes towards the late
morning and afternoon. As the high continues to slowly migrate
farther into the western North Atlantic, breezes will continue to
slowly slacken as well as shift to the east to southeast. Weak
high pressure maintains control over the weekend into early next
week promoting light to gentle east to southeast breezes.
The Approximate Shoreward Edge of the Gulf Stream as of April 22...
19 NM South of Dry Tortugas Light...on Loggerhead Key.
11 NM South of Cosgrove Shoal Light...off the Marquesas Keys.
8 NM South of Sand Key Light...off Key West.
13 NM South of Looe Key...off Big Pine Key.
19 NM Southeast of Sombrero Key Light...off Marathon.
24 NM Southeast of Alligator Reef Light...off Islamorada.
26 NM Southeast of Molasses Reef Light...off Key Largo.
14 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 and RTOFS.
$$
GMZ031-232030-
Florida Bay including Barnes Sound, Blackwater Sound, and
Buttonwood Sound-
429 AM EDT Thu Apr 23 2026
...SMALL CRAFT SHOULD EXERCISE CAUTION UNTIL WINDS DECREASE...
.TODAY...East winds 15 to 20 knots early, decreasing to near 15
knots. Bay waters choppy, becoming a moderate chop. A chance of
showers with a slight chance of thunderstorms.
.TONIGHT...East to southeast winds 10 to 15 knots. Bay waters a
light to moderate chop. A chance of showers with a slight chance
of thunderstorms.
.FRIDAY...Southeast winds near 10 knots. Bay waters a light chop.
A chance of showers with a slight chance of thunderstorms.
.FRIDAY NIGHT...East to southeast winds 5 to 10 knots. Bay waters
smooth to a light chop. A slight chance of showers.
.SATURDAY...East to southeast winds 5 to 10 knots. Bay waters
smooth to a light chop. A slight chance of showers.
.SATURDAY NIGHT...East to southeast winds near 5 knots. Bay
waters smooth.
.SUNDAY...Southeast winds 5 to 10 knots. Bay waters smooth to a
light chop.
.SUNDAY NIGHT...East to southeast winds near 5 knots. Bay waters
smooth.
.MONDAY...East to southeast winds 5 to 10 knots. Bay waters
smooth to a light chop.
.MONDAY NIGHT...East winds 5 to 10 knots. Bay waters smooth to a
light chop.
$$
GMZ032-035-232030-
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-
429 AM EDT Thu Apr 23 2026
...SMALL CRAFT SHOULD EXERCISE CAUTION UNTIL WINDS DECREASE...
.TODAY...East winds 15 to 20 knots early, decreasing to near 15
knots. Seas 1 to 2 feet, except 3 to 4 feet, occasionally to 5
feet west of the Marquesas Keys. Nearshore waters choppy, becoming
a moderate chop. A chance of showers with a slight chance of
thunderstorms.
.TONIGHT...East to southeast winds near 15 knots. Seas 1 to
2 feet, except 2 to 3 feet west of the Marquesas Keys. Nearshore
waters a moderate chop. A chance of showers with a slight chance
of thunderstorms.
.FRIDAY...East to southeast winds 10 to 15 knots. Seas around
1 foot, except around 2 feet west of the Marquesas Keys.
Nearshore waters a light to moderate chop. A chance of showers
with a slight chance of thunderstorms.
.FRIDAY NIGHT...East to southeast winds near 10 knots. Seas
around 1 foot, except 1 to 2 feet west of the Marquesas Keys.
Nearshore waters a light chop. A slight chance of showers.
.SATURDAY...East to southeast winds 5 to 10 knots. Seas around 1
foot. Nearshore waters smooth to a light chop. A slight chance of
showers.
.SATURDAY NIGHT...East to southeast winds 5 to 10 knots. Seas
around 1 foot. Nearshore waters smooth to a light chop.
.SUNDAY...Southeast winds near 5 knots. Seas 1 foot or less.
Nearshore waters smooth.
.SUNDAY NIGHT...East winds near 5 knots. Seas 1 foot or less.
Nearshore waters smooth.
.MONDAY...East to southeast winds near 5 knots. Seas 1 foot or
less. Nearshore waters smooth.
.MONDAY NIGHT...East winds 5 to 10 knots. Seas around 1 foot.
Nearshore waters smooth to a light chop.
$$
GMZ042>044-232030-
Hawk Channel from Ocean Reef to Craig Key out to the reef-
Hawk Channel from Craig Key to west end of Seven Mile Bridge out
to the reef-
Hawk Channel from west end of Seven Mile Bridge to Halfmoon Shoal
out to the reef-
429 AM EDT Thu Apr 23 2026
...SMALL CRAFT SHOULD EXERCISE CAUTION UNTIL WINDS DECREASE...
.TODAY...East winds 15 to 20 knots early, decreasing to near 15
knots. Seas 2 to 4 feet, occasionally to 5 feet. Nearshore waters
choppy, becoming a moderate chop. A chance of showers with a
slight chance of thunderstorms.
.TONIGHT...East to southeast winds near 15 knots. Seas 2 to
3 feet. Nearshore waters a moderate chop. Showers likely with a
slight chance of thunderstorms.
.FRIDAY...East to southeast winds 10 to 15 knots. Seas 2 to
3 feet. Nearshore waters a light to moderate chop. A chance of
showers with a slight chance of thunderstorms.
.FRIDAY NIGHT...East to southeast winds near 10 knots. Seas around
2 feet. Nearshore waters a light chop. A slight chance of
showers.
.SATURDAY...East to southeast winds 5 to 10 knots. Seas 1 to
2 feet. Nearshore waters smooth to a light chop. A slight chance
of showers.
.SATURDAY NIGHT...East winds 5 to 10 knots. Seas around 1 foot.
Nearshore waters smooth to a light chop.
.SUNDAY...Southeast winds 5 to 10 knots. Seas around 1 foot.
Nearshore waters smooth to a light chop.
.SUNDAY NIGHT...East winds near 5 knots. Seas around 1 foot.
Nearshore waters smooth.
.MONDAY...East to southeast winds 5 to 10 knots. Seas around
1 foot. Nearshore waters smooth to a light chop.
.MONDAY NIGHT...East winds 5 to 10 knots. Seas around 1 foot.
Nearshore waters smooth to a light chop.
$$
GMZ052>055-072>075-232030-
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-
429 AM EDT Thu Apr 23 2026
...SMALL CRAFT SHOULD EXERCISE CAUTION...
.TODAY...East winds 15 to 20 knots. Seas 4 to 6 feet,
occasionally to 7 feet. Wave Detail: East 5 feet at 6 seconds. A
chance of showers with a slight chance of thunderstorms.
.TONIGHT...East to southeast winds 15 to 20 knots, decreasing to 10
to 15 knots. Seas 3 to 5 feet, occasionally to 6 feet, subsiding
to 2 to 4 feet, occasionally to 5 feet. Wave Detail: East 5 feet
at 6 seconds. Showers with a slight chance of thunderstorms.
.FRIDAY...East to 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. Wave Detail: East to southeast 3 feet at
5 seconds. A chance of showers with a slight chance of
thunderstorms.
.FRIDAY NIGHT...East to southeast winds near 10 knots. Seas around
2 feet. A slight chance of showers.
.SATURDAY...East to southeast winds 5 to 10 knots. Seas 1 to
2 feet. A slight chance of showers.
.SATURDAY NIGHT...East winds 5 to 10 knots. Seas 1 to 2 feet.
.SUNDAY...East to southeast winds 5 to 10 knots. Seas 1 to 2 feet.
.SUNDAY NIGHT AND MONDAY...East winds 5 to 10 knots. Seas 1 to 2
feet.
.MONDAY NIGHT...East winds near 10 knots. Seas 1 to 2 feet.
$$
GMZ033-034-232030-
Gulf of America from East Cape Sable to Chokoloskee 20 to 60 NM
out and beyond 5 fathoms-
Gulf of America including Dry Tortugas and Rebecca Shoal Channel-
429 AM EDT Thu Apr 23 2026
...SMALL CRAFT SHOULD EXERCISE CAUTION UNTIL WINDS DECREASE...
.TODAY...East to southeast winds 15 to 20 knots, decreasing to
near 15 knots. Seas 2 to 4 feet, occasionally to 5 feet. Wave
Detail: East to southeast 4 feet at 5 seconds. A chance of
showers with a slight chance of thunderstorms.
.TONIGHT...East to southeast winds near 15 knots. Seas 2 to
3 feet. Wave Detail: East to southeast 3 feet at 4 seconds. A
chance of showers with a slight chance of thunderstorms.
.FRIDAY...East to southeast winds 10 to 15 knots, decreasing to
near 10 knots. Seas 2 to 3 feet, subsiding to 1 to 2 feet. Wave
Detail: Southeast 3 feet at 4 seconds. A chance of showers with a
slight chance of thunderstorms.
.FRIDAY NIGHT...East to southeast winds 5 to 10 knots, increasing
to near 10 knots. Seas 1 to 2 feet. A slight chance of showers.
.SATURDAY...East to southeast winds near 10 knots, decreasing to
5 to 10 knots. Seas 1 to 2 feet. A slight chance of showers.
.SATURDAY NIGHT...East to southeast winds near 5 knots,
increasing to 5 to 10 knots after midnight. Seas around 1 foot.
.SUNDAY...Southeast winds 5 to 10 knots. Seas around 1 foot.
.SUNDAY NIGHT...Northeast to east winds near 5 knots. Seas 1 foot
or less.
.MONDAY AND MONDAY NIGHT...East to southeast winds 5 to 10 knots.
Seas around 1 foot.
$$
MJV
CWFKEY
Coastal Waters Forecast for the Florida Keys
National Weather Service Key West FL
429 AM EDT Thu Apr 23 2026
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.
GMZ005-232030-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
429 AM EDT Thu Apr 23 2026
.SYNOPSIS...High pressure over the western North Atlantic will
maintain moderate to fresh easterly breezes early this morning
before slackening to mainly moderate breezes towards the late
morning and afternoon. As the high continues to slowly migrate
farther into the western North Atlantic, breezes will continue to
slowly slacken as well as shift to the east to southeast. Weak
high pressure maintains control over the weekend into early next
week promoting light to gentle east to southeast breezes.
The Approximate Shoreward Edge of the Gulf Stream as of April 22...
19 NM South of Dry Tortugas Light...on Loggerhead Key.
11 NM South of Cosgrove Shoal Light...off the Marquesas Keys.
8 NM South of Sand Key Light...off Key West.
13 NM South of Looe Key...off Big Pine Key.
19 NM Southeast of Sombrero Key Light...off Marathon.
24 NM Southeast of Alligator Reef Light...off Islamorada.
26 NM Southeast of Molasses Reef Light...off Key Largo.
14 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 and RTOFS.
$$
GMZ031-232030-
Florida Bay including Barnes Sound, Blackwater Sound, and
Buttonwood Sound-
429 AM EDT Thu Apr 23 2026
...SMALL CRAFT SHOULD EXERCISE CAUTION UNTIL WINDS DECREASE...
.TODAY...East winds 15 to 20 knots early, decreasing to near 15
knots. Bay waters choppy, becoming a moderate chop. A chance of
showers with a slight chance of thunderstorms.
.TONIGHT...East to southeast winds 10 to 15 knots. Bay waters a
light to moderate chop. A chance of showers with a slight chance
of thunderstorms.
.FRIDAY...Southeast winds near 10 knots. Bay waters a light chop.
A chance of showers with a slight chance of thunderstorms.
.FRIDAY NIGHT...East to southeast winds 5 to 10 knots. Bay waters
smooth to a light chop. A slight chance of showers.
.SATURDAY...East to southeast winds 5 to 10 knots. Bay waters
smooth to a light chop. A slight chance of showers.
.SATURDAY NIGHT...East to southeast winds near 5 knots. Bay
waters smooth.
.SUNDAY...Southeast winds 5 to 10 knots. Bay waters smooth to a
light chop.
.SUNDAY NIGHT...East to southeast winds near 5 knots. Bay waters
smooth.
.MONDAY...East to southeast winds 5 to 10 knots. Bay waters
smooth to a light chop.
.MONDAY NIGHT...East winds 5 to 10 knots. Bay waters smooth to a
light chop.
$$
GMZ032-035-232030-
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-
429 AM EDT Thu Apr 23 2026
...SMALL CRAFT SHOULD EXERCISE CAUTION UNTIL WINDS DECREASE...
.TODAY...East winds 15 to 20 knots early, decreasing to near 15
knots. Seas 1 to 2 feet, except 3 to 4 feet, occasionally to 5
feet west of the Marquesas Keys. Nearshore waters choppy, becoming
a moderate chop. A chance of showers with a slight chance of
thunderstorms.
.TONIGHT...East to southeast winds near 15 knots. Seas 1 to
2 feet, except 2 to 3 feet west of the Marquesas Keys. Nearshore
waters a moderate chop. A chance of showers with a slight chance
of thunderstorms.
.FRIDAY...East to southeast winds 10 to 15 knots. Seas around
1 foot, except around 2 feet west of the Marquesas Keys.
Nearshore waters a light to moderate chop. A chance of showers
with a slight chance of thunderstorms.
.FRIDAY NIGHT...East to southeast winds near 10 knots. Seas
around 1 foot, except 1 to 2 feet west of the Marquesas Keys.
Nearshore waters a light chop. A slight chance of showers.
.SATURDAY...East to southeast winds 5 to 10 knots. Seas around 1
foot. Nearshore waters smooth to a light chop. A slight chance of
showers.
.SATURDAY NIGHT...East to southeast winds 5 to 10 knots. Seas
around 1 foot. Nearshore waters smooth to a light chop.
.SUNDAY...Southeast winds near 5 knots. Seas 1 foot or less.
Nearshore waters smooth.
.SUNDAY NIGHT...East winds near 5 knots. Seas 1 foot or less.
Nearshore waters smooth.
.MONDAY...East to southeast winds near 5 knots. Seas 1 foot or
less. Nearshore waters smooth.
.MONDAY NIGHT...East winds 5 to 10 knots. Seas around 1 foot.
Nearshore waters smooth to a light chop.
$$
GMZ042>044-232030-
Hawk Channel from Ocean Reef to Craig Key out to the reef-
Hawk Channel from Craig Key to west end of Seven Mile Bridge out
to the reef-
Hawk Channel from west end of Seven Mile Bridge to Halfmoon Shoal
out to the reef-
429 AM EDT Thu Apr 23 2026
...SMALL CRAFT SHOULD EXERCISE CAUTION UNTIL WINDS DECREASE...
.TODAY...East winds 15 to 20 knots early, decreasing to near 15
knots. Seas 2 to 4 feet, occasionally to 5 feet. Nearshore waters
choppy, becoming a moderate chop. A chance of showers with a
slight chance of thunderstorms.
.TONIGHT...East to southeast winds near 15 knots. Seas 2 to
3 feet. Nearshore waters a moderate chop. Showers likely with a
slight chance of thunderstorms.
.FRIDAY...East to southeast winds 10 to 15 knots. Seas 2 to
3 feet. Nearshore waters a light to moderate chop. A chance of
showers with a slight chance of thunderstorms.
.FRIDAY NIGHT...East to southeast winds near 10 knots. Seas around
2 feet. Nearshore waters a light chop. A slight chance of
showers.
.SATURDAY...East to southeast winds 5 to 10 knots. Seas 1 to
2 feet. Nearshore waters smooth to a light chop. A slight chance
of showers.
.SATURDAY NIGHT...East winds 5 to 10 knots. Seas around 1 foot.
Nearshore waters smooth to a light chop.
.SUNDAY...Southeast winds 5 to 10 knots. Seas around 1 foot.
Nearshore waters smooth to a light chop.
.SUNDAY NIGHT...East winds near 5 knots. Seas around 1 foot.
Nearshore waters smooth.
.MONDAY...East to southeast winds 5 to 10 knots. Seas around
1 foot. Nearshore waters smooth to a light chop.
.MONDAY NIGHT...East winds 5 to 10 knots. Seas around 1 foot.
Nearshore waters smooth to a light chop.
$$
GMZ052>055-072>075-232030-
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-
429 AM EDT Thu Apr 23 2026
...SMALL CRAFT SHOULD EXERCISE CAUTION...
.TODAY...East winds 15 to 20 knots. Seas 4 to 6 feet,
occasionally to 7 feet. Wave Detail: East 5 feet at 6 seconds. A
chance of showers with a slight chance of thunderstorms.
.TONIGHT...East to southeast winds 15 to 20 knots, decreasing to 10
to 15 knots. Seas 3 to 5 feet, occasionally to 6 feet, subsiding
to 2 to 4 feet, occasionally to 5 feet. Wave Detail: East 5 feet
at 6 seconds. Showers with a slight chance of thunderstorms.
.FRIDAY...East to 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. Wave Detail: East to southeast 3 feet at
5 seconds. A chance of showers with a slight chance of
thunderstorms.
.FRIDAY NIGHT...East to southeast winds near 10 knots. Seas around
2 feet. A slight chance of showers.
.SATURDAY...East to southeast winds 5 to 10 knots. Seas 1 to
2 feet. A slight chance of showers.
.SATURDAY NIGHT...East winds 5 to 10 knots. Seas 1 to 2 feet.
.SUNDAY...East to southeast winds 5 to 10 knots. Seas 1 to 2 feet.
.SUNDAY NIGHT AND MONDAY...East winds 5 to 10 knots. Seas 1 to 2
feet.
.MONDAY NIGHT...East winds near 10 knots. Seas 1 to 2 feet.
$$
GMZ033-034-232030-
Gulf of America from East Cape Sable to Chokoloskee 20 to 60 NM
out and beyond 5 fathoms-
Gulf of America including Dry Tortugas and Rebecca Shoal Channel-
429 AM EDT Thu Apr 23 2026
...SMALL CRAFT SHOULD EXERCISE CAUTION UNTIL WINDS DECREASE...
.TODAY...East to southeast winds 15 to 20 knots, decreasing to
near 15 knots. Seas 2 to 4 feet, occasionally to 5 feet. Wave
Detail: East to southeast 4 feet at 5 seconds. A chance of
showers with a slight chance of thunderstorms.
.TONIGHT...East to southeast winds near 15 knots. Seas 2 to
3 feet. Wave Detail: East to southeast 3 feet at 4 seconds. A
chance of showers with a slight chance of thunderstorms.
.FRIDAY...East to southeast winds 10 to 15 knots, decreasing to
near 10 knots. Seas 2 to 3 feet, subsiding to 1 to 2 feet. Wave
Detail: Southeast 3 feet at 4 seconds. A chance of showers with a
slight chance of thunderstorms.
.FRIDAY NIGHT...East to southeast winds 5 to 10 knots, increasing
to near 10 knots. Seas 1 to 2 feet. A slight chance of showers.
.SATURDAY...East to southeast winds near 10 knots, decreasing to
5 to 10 knots. Seas 1 to 2 feet. A slight chance of showers.
.SATURDAY NIGHT...East to southeast winds near 5 knots,
increasing to 5 to 10 knots after midnight. Seas around 1 foot.
.SUNDAY...Southeast winds 5 to 10 knots. Seas around 1 foot.
.SUNDAY NIGHT...Northeast to east winds near 5 knots. Seas 1 foot
or less.
.MONDAY AND MONDAY NIGHT...East to southeast winds 5 to 10 knots.
Seas around 1 foot.
$$
MJV