926
FZUS52 KKEY 231749
CWFKEY

Coastal Waters Forecast for the Florida Keys
National Weather Service Key West FL
149 PM EDT Mon Sep 23 2024

Florida Bay, Hawk Channel and Straits of Florida from Ocean Reef
to south of Dry Tortugas, and the extreme southeastern Gulf of
Mexico, 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.

GMZ005-240000-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
149 PM EDT Mon Sep 23 2024

.SYNOPSIS...Gentle to moderate easterly flow across the Keys
coastal waters this afternoon will continue to steadily increase
tonight through Tuesday, as high pressure builds along the
Eastern Seaboard, and a tropical low develops in the northwestern
Caribbean Sea. Heading through the middle and later part of the
week, the forecast will depend on the development and movement of
this low. At this time, we expect fresh to strong east to
southeast breezes to develop late Tuesday, with strong southeast
winds peaking Wednesday night into Thursday as the tropical system
moves northward across the eastern Gulf of Mexico. The strongest
winds and highest seas are expected over western sections of the
Keys waters. Mariners should continue to closely monitor the
latest forecast updates during the next few days.

The Approximate Shoreward Edge of the Gulf Stream as of September
18...

63 NM South of Dry Tortugas Light...on Loggerhead Key.
23 NM South of Cosgrove Shoal Light...off the Marquesas Keys.
 8 NM South of Sand Key Light...off Key West.
12 NM South of Looe Key...off Big Pine Key.
13 NM South of Sombrero Key Light...off Marathon.
 6 NM Southeast of Alligator Reef Light...off Islamorada.
 4 NM Southeast of Molasses Reef Light...off Key Largo.
 5 NM East of Carysfort Reef Light...off Ocean Reef.

Gulf Stream Information Courtesy of the National Weather Service in
Key West.

$$

GMZ031-240000-
Florida Bay including Barnes Sound, Blackwater Sound, and
Buttonwood Sound-
149 PM EDT Mon Sep 23 2024

.THIS AFTERNOON...East winds near 10 knots, increasing to 10 to
15 knots. Bay waters a light chop, becoming a light to moderate
chop. Isolated showers and thunderstorms.
.TONIGHT...East winds near 15 knots. Bay waters a moderate chop.
Isolated showers and thunderstorms in the evening, then scattered
showers and isolated thunderstorms after midnight.
.TUESDAY...East winds near 15 knots, becoming east to southeast
and increasing to 15 to 20 knots. Bay waters a moderate chop,
becoming choppy. Scattered showers and thunderstorms.
.TUESDAY NIGHT...East to southeast winds 15 to 20 knots. Bay
waters choppy. Numerous showers and scattered thunderstorms.
.WEDNESDAY...Southeast winds near 20 knots. Bay waters rough.
Widespread showers and scattered thunderstorms.
.WEDNESDAY NIGHT...Southeast winds near 20 knots, becoming
southeast to south and increasing to 20 to 25 knots. Bay waters
rough, becoming very rough. Widespread showers and scattered
thunderstorms.
.THURSDAY...Southeast to south winds 20 to 25 knots, becoming
south and decreasing to near 20 knots. Bay waters very rough,
becoming rough. Widespread showers and scattered thunderstorms.
.THURSDAY NIGHT...South winds near 20 knots, becoming south to
southwest and decreasing to 15 to 20 knots. Bay waters rough,
becoming choppy. Numerous showers and scattered thunderstorms.
.FRIDAY...South to southwest winds 15 to 20 knots, decreasing to
near 15 knots. Bay waters choppy, becoming a moderate chop.
Numerous showers and scattered thunderstorms.
.FRIDAY NIGHT...South to southwest winds near 15 knots. Bay
waters a moderate chop. Scattered showers and thunderstorms.

$$

GMZ032-240000-
Bayside and Gulf side from Craig Key to west end of Seven Mile
Bridge-
149 PM EDT Mon Sep 23 2024

.THIS AFTERNOON...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. Isolated
showers and thunderstorms.
.TONIGHT...East winds near 15 knots. Seas 1 to 3 feet. Nearshore
waters a moderate chop. Isolated showers and thunderstorms in the
evening, then scattered showers and isolated thunderstorms after
midnight.
.TUESDAY...East to southeast winds near 15 knots, increasing to 15
to 20 knots. Seas 1 to 3 feet, building to 2 to 3 feet. Nearshore
waters a moderate chop, becoming choppy. Scattered showers and
thunderstorms.
.TUESDAY NIGHT...East to southeast winds near 20 knots. Seas 2 to
3 feet. Nearshore waters rough. Widespread showers and scattered
thunderstorms.
.WEDNESDAY...Southeast winds near 20 knots, increasing to 20 to
25 knots. Seas 2 to 3 feet, building to 2 to 4 feet, occasionally
to 5 feet. Nearshore waters rough, becoming very rough.
Widespread showers and scattered thunderstorms.
.WEDNESDAY NIGHT...Tropical storm conditions possible.
.THURSDAY...Tropical storm conditions possible.
.THURSDAY NIGHT...South winds 20 to 25 knots, becoming south to
southwest and decreasing to near 20 knots. Seas 2 to 4 feet,
occasionally to 5 feet, subsiding to 2 to 3 feet. Nearshore waters
very rough, becoming rough. Numerous showers and scattered
thunderstorms.
.FRIDAY...South to southwest winds near 20 knots. Seas 2 to 3
feet. Nearshore waters rough. Numerous showers and scattered
thunderstorms.
.FRIDAY NIGHT...South to southwest winds 15 to 20 knots,
decreasing to near 15 knots. Seas 2 to 3 feet, subsiding to 1 to
3 feet. Nearshore waters choppy, becoming a moderate chop.
Scattered showers and thunderstorms.

$$

GMZ035-240000-
Gulf of Mexico from west end of Seven Mile Bridge to Halfmoon
Shoal out to 5 Fathoms-
149 PM EDT Mon Sep 23 2024

.THIS AFTERNOON...East winds near 10 knots, increasing to 10 to
15 knots. Seas 1 to 2 feet, building to 1 to 3 feet. Nearshore
waters a light chop, becoming a light to moderate chop. Isolated
showers and thunderstorms.
.TONIGHT...East winds near 15 knots, becoming east to southeast
and increasing to 15 to 20 knots. Seas 2 to 3 feet, building to 2
to 4 feet. Nearshore waters a moderate chop, becoming choppy.
Isolated thunderstorms. Isolated showers and thunderstorms in the
evening, then scattered showers and isolated thunderstorms after
midnight.
.TUESDAY...East to southeast winds 15 to 20 knots, increasing to
near 20 knots. Seas 2 to 3 feet, except 3 to 5 feet, occasionally
to 6 feet west of the Marquesas Keys. Nearshore waters choppy,
becoming rough. Scattered showers and thunderstorms.
.TUESDAY NIGHT...East to southeast winds 20 to 25 knots. Seas
2 to 4 feet, except 4 to 6 feet, occasionally to 7 feet west of
the Marquesas Keys. Nearshore waters very rough. Widespread
showers and scattered thunderstorms.
.WEDNESDAY...Southeast winds 20 to 25 knots, increasing to 25 to
30 knots. Seas 2 to 4 feet. West of the Marquesas Keys, seas 5 to
7 feet, occasionally to 8 feet, building to 6 to 8 feet,
occasionally to 10 feet. Nearshore waters very rough, becoming
extremely rough. Widespread showers and scattered thunderstorms.
.WEDNESDAY NIGHT...Tropical storm conditions possible.
.THURSDAY...Tropical storm conditions possible.
.THURSDAY NIGHT...South to southwest winds 20 to 25 knots. Seas
3 to 5 feet, occasionally to 6 feet, except 7 to 9 feet,
occasionally to 11 feet west of the Marquesas Keys. Nearshore
waters very rough. Numerous showers and scattered thunderstorms.
.FRIDAY...South to southwest winds near 20 knots, decreasing to 15
to 20 knots. Seas 3 to 5 feet, occasionally to 6 feet, subsiding
to 2 to 4 feet, occasionally to 5 feet. West of the Marquesas
Keys, seas 5 to 7 feet, occasionally to 9 feet, subsiding to 4 to
6 feet, occasionally to 7 feet. Nearshore waters rough, becoming
choppy. Numerous showers and scattered thunderstorms.
.FRIDAY NIGHT...South to southwest winds near 15 knots. Seas 2 to
4 feet, occasionally to 5 feet, except 4 to 5 feet, occasionally
to 6 feet west of the Marquesas Keys. Nearshore waters a moderate
chop. Scattered showers and thunderstorms.

$$

GMZ042-043-240000-
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-
149 PM EDT Mon Sep 23 2024

.THIS AFTERNOON...East winds near 10 knots, increasing to 10 to
15 knots. Seas 1 to 2 feet, building to 1 to 3 feet. Nearshore
waters a light chop, becoming a light to moderate chop. Isolated
showers and thunderstorms.
.TONIGHT...East winds near 15 knots, becoming east to southeast.
Seas 1 to 3 feet. Nearshore waters a moderate chop. Isolated
showers and thunderstorms in the evening, then scattered showers
and isolated thunderstorms after midnight.
.TUESDAY...East to southeast winds 15 to 20 knots. Seas 2 to
3 feet, building to 2 to 4 feet, occasionally to 5 feet.
Nearshore waters choppy. Scattered showers and thunderstorms.
.TUESDAY NIGHT...East to southeast winds near 20 knots. Seas 3 to
5 feet, occasionally to 6 feet. Nearshore waters rough. Numerous
showers and scattered thunderstorms.
.WEDNESDAY...Southeast winds near 20 knots. Seas 3 to 5 feet,
occasionally to 6 feet. Nearshore waters rough. Widespread
showers and scattered thunderstorms.
.WEDNESDAY NIGHT...Southeast winds 20 to 25 knots, becoming
southeast to south and increasing to near 25 knots. Seas 4 to 6
feet, occasionally to 7 feet, building to 5 to 7 feet,
occasionally to 9 feet. Nearshore waters very rough, becoming
extremely rough. Widespread showers and scattered thunderstorms.
.THURSDAY...Southeast to south winds near 25 knots, decreasing to 20
to 25 knots. Seas 5 to 7 feet, occasionally to 9 feet, subsiding
to 4 to 6 feet, occasionally to 8 feet. Nearshore waters extremely
rough, becoming very rough. Widespread showers and scattered
thunderstorms.
.THURSDAY NIGHT...South to southwest winds near 20 knots. Seas
3 to 5 feet, occasionally to 7 feet. Nearshore waters rough.
Numerous showers and scattered thunderstorms.
.FRIDAY...South to southwest winds 15 to 20 knots, decreasing to
near 15 knots. Seas 2 to 4 feet, occasionally to 5 feet.
Nearshore waters choppy, a moderate chop. Numerous showers and
scattered thunderstorms.
.FRIDAY NIGHT...South to southwest winds near 15 knots. Seas 2 to
3 feet. Nearshore waters a moderate chop. Scattered showers and
thunderstorms.

$$

GMZ044-240000-
Hawk Channel from west end of Seven Mile Bridge to Halfmoon Shoal
out to the reef-
149 PM EDT Mon Sep 23 2024

.THIS AFTERNOON...East winds near 10 knots, increasing to 10 to
15 knots. Seas 1 to 2 feet, building to around 2 feet. Nearshore
waters a light chop, becoming a light to moderate chop. Isolated
showers and thunderstorms.
.TONIGHT...East winds near 15 knots, becoming east to southeast
and increasing to 15 to 20 knots. Seas 2 to 3 feet, building to 2
to 4 feet, occasionally to 5 feet. Nearshore waters a moderate
chop, becoming choppy. Isolated showers and thunderstorms in the
evening, then scattered showers and isolated thunderstorms after
midnight.
.TUESDAY...East to southeast winds 15 to 20 knots, increasing to
near 20 knots. Seas 2 to 4 feet, occasionally to 5 feet, building
to 3 to 4 feet, occasionally to 6 feet. Nearshore waters choppy,
becoming rough. Scattered showers and thunderstorms.
.TUESDAY NIGHT...East to southeast winds 20 to 25 knots. Seas
3 to 5 feet, occasionally to 6 feet. Nearshore waters very rough.
Widespread showers and scattered thunderstorms.
.WEDNESDAY...Southeast winds 20 to 25 knots, increasing to 25 to
30 knots. Seas 4 to 6 feet, occasionally to 8 feet, except 5 to 7
feet, occasionally to 9 feet west of Cosgrove Shoal Light.
Nearshore waters very rough, becoming extremely rough. Widespread
showers and scattered thunderstorms.
.WEDNESDAY NIGHT...Tropical storm conditions possible.
.THURSDAY...Tropical storm conditions possible.
.THURSDAY NIGHT...South to southwest winds 20 to 25 knots,
decreasing to near 20 knots. Seas 5 to 7 feet, occasionally to 9
feet, except 7 to 9 feet, occasionally to 11 feet west of Cosgrove
Shoal Light. Nearshore waters very rough, becoming rough.
Numerous showers and scattered thunderstorms.
.FRIDAY...South to southwest winds near 20 knots, decreasing to 15
to 20 knots. Seas 4 to 6 feet, occasionally to 8 feet, subsiding
to 3 to 5 feet, occasionally to 6 feet. West of Cosgrove Shoal
Light, seas 5 to 7 feet, occasionally to 9 feet, subsiding to 4 to
6 feet, occasionally to 8 feet. Nearshore waters rough, becoming
choppy. Numerous showers and scattered thunderstorms.
.FRIDAY NIGHT...South to southwest winds near 15 knots. Seas 2 to
4 feet, occasionally to 5 feet, except 4 to 5 feet, occasionally
to 6 feet west of Cosgrove Shoal Light. Nearshore waters a
moderate chop. Scattered showers and thunderstorms.

$$

GMZ052-053-072-073-240000-
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 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-
149 PM EDT Mon Sep 23 2024

.THIS AFTERNOON...East winds near 10 knots, increasing to 10 to
15 knots. Seas around 2 feet, building to 2 to 3 feet. Wave
Detail: East 2 feet at 3 seconds. Scattered showers and isolated
thunderstorms.
.TONIGHT...East to southeast winds 15 to 20 knots. Seas 2 to
4 feet, occasionally to 5 feet. Wave Detail: East 3 feet at 4
seconds. Isolated showers and thunderstorms in the evening, then
scattered showers and isolated thunderstorms after midnight.
.TUESDAY...East to southeast winds 15 to 20 knots. Seas 2 to
4 feet, occasionally to 5 feet. Wave Detail: East to southeast 3
feet at 4 seconds. Numerous showers and scattered thunderstorms.
.TUESDAY NIGHT...East to southeast winds near 20 knots. Seas 3 to
4 feet, occasionally to 5 feet. Widespread showers and scattered
thunderstorms.
.WEDNESDAY...Southeast winds 20 to 25 knots. Seas 4 to 6 feet,
occasionally to 8 feet. Widespread showers and scattered
thunderstorms.
.WEDNESDAY NIGHT...Southeast winds 20 to 25 knots, becoming
southeast to south and increasing to near 25 knots. Seas 5 to 8
feet, occasionally to 10 feet, building to 6 to 9 feet,
occasionally to 11 feet. Widespread showers and scattered
thunderstorms.
.THURSDAY...Southeast to south winds near 25 knots, decreasing to
20 to 25 knots. Seas 6 to 9 feet, occasionally to 11 feet,
subsiding to 5 to 8 feet, occasionally to 10 feet. Numerous
showers and scattered thunderstorms.
.THURSDAY NIGHT...South winds near 20 knots, becoming south to
southwest. Seas 6 to 7 feet, occasionally to 9 feet. Numerous
showers and scattered thunderstorms.
.FRIDAY...South to southwest winds 15 to 20 knots, decreasing to
near 15 knots. Seas 4 to 6 feet, occasionally to 8 feet,
subsiding to 3 to 5 feet, occasionally to 7 feet. Numerous showers
and scattered thunderstorms.
.FRIDAY NIGHT...South to southwest winds near 15 knots. Seas 3 to
4 feet, occasionally to 5 feet. Scattered showers and
thunderstorms.

$$

GMZ054-074-240000-
Straits of Florida from west end of Seven Mile Bridge to south of
Halfmoon Shoal out 20 NM-
Straits of Florida from west end of Seven Mile Bridge to south of
Halfmoon Shoal 20 to 60 NM out-
149 PM EDT Mon Sep 23 2024

.THIS AFTERNOON...East winds near 10 knots, increasing to near 15
knots. Seas around 2 feet, building to 2 to 3 feet. Wave Detail:
East 3 feet at 4 seconds. Scattered showers and isolated
thunderstorms.
.TONIGHT...East winds near 15 knots, becoming east to southeast
and increasing to 15 to 20 knots. Seas around 3 feet, building to
3 to 4 feet, occasionally to 5 feet. Wave Detail: East 3 feet at
5 seconds. Isolated showers and thunderstorms in the evening, then
scattered showers and isolated thunderstorms after midnight.
.TUESDAY...East to southeast winds 15 to 20 knots, increasing to
near 20 knots. Seas 3 to 4 feet, occasionally to 5 feet, building
to 4 to 5 feet, occasionally to 6 feet. Wave Detail: East 4 feet
at 5 seconds. Numerous showers and scattered thunderstorms.
.TUESDAY NIGHT...East to southeast winds 20 to 25 knots. Seas
4 to 6 feet, occasionally to 7 feet. Widespread showers and
scattered thunderstorms.
.WEDNESDAY...Southeast winds 20 to 25 knots, increasing to 25 to
30 knots. Seas 5 to 8 feet, occasionally to 10 feet. Widespread
showers and scattered thunderstorms.
.WEDNESDAY NIGHT...Tropical storm conditions possible.
.THURSDAY...Tropical storm conditions possible.
.THURSDAY NIGHT...South to southwest winds near 25 knots,
decreasing to 20 to 25 knots. Seas 7 to 10 feet, occasionally to
13 feet, subsiding to 6 to 9 feet, occasionally to 11 feet.
Numerous showers and scattered thunderstorms.
.FRIDAY...South to southwest winds near 20 knots, decreasing to 15
to 20 knots. Seas 5 to 8 feet, occasionally to 10 feet. Numerous
showers and scattered thunderstorms.
.FRIDAY NIGHT...South to southwest winds near 15 knots. Seas 4 to
6 feet, occasionally to 8 feet. Scattered showers and
thunderstorms.

$$

GMZ033-034-055-075-240000-
Gulf waters from East Cape Sable to Chokoloskee 20 to 60 NM out
and beyond 5 fathoms-
Gulf of Mexico including Dry Tortugas and Rebecca Shoal Channel-
Straits of Florida from Halfmoon Shoal to 20 NM west of Dry
Tortugas out 20 NM-
Straits of Florida from Halfmoon Shoal to 20 NM west of Dry
Tortugas 20 to 60 NM out-
149 PM EDT Mon Sep 23 2024

.THIS AFTERNOON...East winds near 10 knots, increasing to 10 to
15 knots. Seas 1 to 2 feet, building to 1 to 3 feet. Wave Detail:
East 2 feet at 3 seconds. Isolated showers and thunderstorms.
.TONIGHT...East winds near 15 knots, becoming east to southeast
and increasing to 15 to 20 knots. Seas 2 to 3 feet, building to 2
to 4 feet, occasionally to 5 feet. Wave Detail: East 3 feet at 4
seconds. Scattered showers and isolated thunderstorms.
.TUESDAY...East to southeast winds 15 to 20 knots, increasing to
near 20 knots. Seas 2 to 4 feet, occasionally to 5 feet, building
to 3 to 5 feet, occasionally to 6 feet. Wave Detail: East to
southeast 4 feet at 5 seconds. Numerous showers and scattered
thunderstorms.
.TUESDAY NIGHT...East to southeast winds 20 to 25 knots,
increasing to 25 to 30 knots. Seas 4 to 6 feet, occasionally to 8
feet, building to 5 to 8 feet, occasionally to 11 feet.
Widespread showers and scattered thunderstorms.
.WEDNESDAY...Tropical storm conditions possible. Southeast winds
25 to 35 knots with gusts up to 45 knots. Seas 5 to 8 feet,
occasionally to 11 feet, building to 8 to 11 feet, occasionally
to 14 feet. Widespread showers and scattered thunderstorms.
.WEDNESDAY NIGHT...Tropical storm conditions possible.
.THURSDAY...Tropical storm conditions possible.
.THURSDAY NIGHT...South to southwest winds near 25 knots,
decreasing to 20 to 25 knots. Seas 8 to 11 feet, occasionally to
14 feet, subsiding to 7 to 9 feet, occasionally to 11 feet.
Numerous showers and scattered thunderstorms.
.FRIDAY...South to southwest winds near 20 knots, decreasing to 15
to 20 knots. Seas 6 to 9 feet, occasionally to 11 feet, subsiding
to 5 to 7 feet, occasionally to 9 feet. Numerous showers and
scattered thunderstorms.
.FRIDAY NIGHT...South to southwest winds near 15 knots. Seas 4 to
6 feet, occasionally to 8 feet. Numerous showers and scattered
thunderstorms.

$$

MJV