Coastal Waters Forecast
Issued by NWS Key West, FL

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406
FZUS52 KKEY 160229
CWFKEY

Coastal Waters Forecast for the Florida Keys
National Weather Service Key West FL
1029 PM EDT Tue Oct 15 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.

GMZ005-160830-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
1029 PM EDT Tue Oct 15 2024

.SYNOPSIS...Weak high pressure over the Gulf of Mexico will
maintain light to gentle, northeast to east breezes across the
Florida Keys coastal waters tonight. Breezes will begin to freshen
Wednesday, becoming strong Wednesday night, as a frontal boundary
pushes southward through the Keys marine zones. An extended
period of strong northeast breezes is expected late this week, as
a large continental high pressure area settles across the eastern
states and interacts with this frontal feature.

The Approximate Shoreward Edge of the Gulf Stream as of October
5...

16 NM South of Dry Tortugas Light...on Loggerhead Key.
10 NM South of Cosgrove Shoal Light...off the Marquesas Keys.
 7 NM South of Sand Key Light...off Key West.
 8 NM South of Looe Key...off Big Pine Key.
12 NM South of Sombrero Key Light...off Marathon.
 8 NM Southeast of Alligator Reef Light...off Islamorada.
 5 NM Southeast of Molasses Reef Light...off Key Largo.
 8 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 the Real Time Ocean Forecast
System.

$$

GMZ031-160830-
Florida Bay including Barnes Sound, Blackwater Sound, and
Buttonwood Sound-
1029 PM EDT Tue Oct 15 2024

.OVERNIGHT...East winds near 5 knots, becoming northeast. Bay
waters smooth. Scattered showers and isolated thunderstorms.
.WEDNESDAY...North to northeast winds near 5 knots, increasing to
near 10 knots. Bay waters smooth, becoming a light chop.
Scattered showers and isolated thunderstorms.
.WEDNESDAY NIGHT...North to northeast winds 10 to 15 knots,
becoming northeast and increasing to 15 to 20 knots. Bay waters
a light to moderate chop, becoming choppy. Scattered showers and
isolated thunderstorms.
.THURSDAY...North to northeast winds near 20 knots, becoming
northeast and increasing to 20 to 25 knots. Bay waters rough,
becoming very rough. Scattered showers and isolated thunderstorms.
.THURSDAY NIGHT...Northeast winds 20 to 25 knots. Bay waters very
rough. Scattered showers and isolated thunderstorms.
.FRIDAY...Northeast winds 20 to 25 knots, increasing to near 25
knots. Bay waters very rough, becoming extremely rough. Numerous
showers and isolated thunderstorms.
.FRIDAY NIGHT...Northeast to east winds 20 to 25 knots. Bay
waters very rough. Numerous showers and isolated thunderstorms.
.SATURDAY...Northeast to east winds 20 to 25 knots. Bay waters
very rough. Numerous showers and isolated thunderstorms.
.SATURDAY NIGHT...Northeast to east winds 20 to 25 knots. Bay
waters very rough. Scattered showers and isolated thunderstorms.
.SUNDAY...Northeast winds 20 to 25 knots, decreasing to near 20
knots. Bay waters very rough, becoming rough. Scattered showers.
.SUNDAY NIGHT...Northeast winds near 20 knots. Bay waters rough.
Isolated showers.

$$

GMZ032-035-160830-
Bayside and Gulf side from Craig Key to west end of Seven Mile
Bridge-
Gulf of Mexico from west end of Seven Mile Bridge to Halfmoon
Shoal out to 5 Fathoms-
1029 PM EDT Tue Oct 15 2024

.OVERNIGHT...East to southeast winds near 5 knots, becoming
northeast. Seas 1 foot or less. Nearshore waters smooth.
Scattered showers and isolated thunderstorms.
.WEDNESDAY...North to northeast winds near 10 knots, increasing
to near 15 knots in the afternoon. Seas 1 foot or less, building
to 1 to 2 feet. Nearshore waters a light chop, becoming a moderate
chop. Scattered showers and isolated thunderstorms.
.WEDNESDAY NIGHT...North to northeast winds 15 to 20 knots,
becoming northeast and increasing to 20 to 25 knots after
midnight. Seas 1 to 3 feet, building to 2 to 4 feet, occasionally
to 5 feet. West of the Marquesas Keys, seas 2 to 4 feet,
occasionally to 5 feet, building to 5 to 7 feet, occasionally to 8
feet. Nearshore waters choppy, becoming very rough. Scattered
showers and isolated thunderstorms.
.THURSDAY AND THURSDAY NIGHT...Northeast winds near 25 knots.
Seas 3 to 5 feet, occasionally to 6 feet, except 6 to 7 feet,
occasionally to 9 feet west of the Marquesas Keys. Nearshore
waters extremely rough. Scattered showers and isolated
thunderstorms.
.FRIDAY...Northeast winds near 25 knots. Seas 3 to 5 feet,
occasionally to 6 feet, except 6 to 8 feet, occasionally to 10
feet west of the Marquesas Keys. Nearshore waters extremely rough.
Numerous showers and isolated thunderstorms.
.FRIDAY NIGHT AND SATURDAY...Northeast to east winds near 25
knots. Seas 3 to 5 feet, occasionally to 6 feet, except 6 to 8
feet, occasionally to 10 feet west of the Marquesas Keys.
Nearshore waters extremely rough. Numerous showers and isolated
thunderstorms.
.SATURDAY NIGHT...Northeast to east winds near 25 knots. Seas
3 to 5 feet, occasionally to 6 feet, except 6 to 8 feet,
occasionally to 10 feet west of the Marquesas Keys. Nearshore
waters extremely rough. Scattered showers and isolated
thunderstorms.
.SUNDAY...Northeast to east winds 20 to 25 knots. Seas 3 to
5 feet, occasionally to 6 feet, except 6 to 7 feet, occasionally
to 9 feet west of the Marquesas Keys. Nearshore waters very rough.
Scattered showers.
.SUNDAY NIGHT...Northeast winds 20 to 25 knots. Seas 3 to 5 feet,
occasionally to 6 feet. West of the Marquesas Keys, seas 5 to 6
feet, occasionally to 8 feet, subsiding to around 4 feet,
occasionally to 5 feet. Nearshore waters very rough. 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-
1029 PM EDT Tue Oct 15 2024

.OVERNIGHT...East to southeast winds near 5 knots, becoming
northeast. Seas around 1 foot. Nearshore waters smooth. Scattered
showers and isolated thunderstorms.
.WEDNESDAY...North to northeast winds near 10 knots, increasing
to near 15 knots in the afternoon. Seas around 1 foot, building
to 1 to 2 feet. Nearshore waters a light chop, becoming a moderate
chop. Scattered showers and isolated thunderstorms.
.WEDNESDAY NIGHT...North to northeast winds 15 to 20 knots,
becoming northeast and increasing to 20 to 25 knots after
midnight. Seas 1 to 2 feet, building to 2 to 4 feet, occasionally
to 5 feet. West of Cosgrove Shoal Light, seas 2 to 3 feet,
building to 4 to 6 feet, occasionally to 8 feet. Nearshore waters
choppy, becoming very rough. Scattered showers and isolated
thunderstorms.
.THURSDAY AND THURSDAY NIGHT...Northeast winds near 25 knots.
Seas 3 to 5 feet, occasionally to 6 feet, except 5 to 7 feet,
occasionally to 9 feet west of Cosgrove Shoal Light. Nearshore
waters extremely rough. Scattered showers and isolated
thunderstorms.
.FRIDAY...Northeast winds near 25 knots. Seas 4 to 6 feet,
occasionally to 8 feet. Nearshore waters extremely rough.
Numerous showers and isolated thunderstorms.
.FRIDAY NIGHT AND SATURDAY...Northeast to east winds near 25
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 extremely rough. Numerous showers and isolated
thunderstorms.
.SATURDAY NIGHT...Northeast to east winds near 25 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 extremely rough. Scattered showers and isolated
thunderstorms.
.SUNDAY...Northeast to east winds 20 to 25 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. Scattered showers.
.SUNDAY NIGHT...Northeast winds 20 to 25 knots. Seas 3 to 5 feet,
occasionally to 6 feet. West of Cosgrove Shoal Light, seas 5 to 6
feet, occasionally to 8 feet, subsiding to around 4 feet,
occasionally to 5 feet. Nearshore waters very rough. 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-
1029 PM EDT Tue Oct 15 2024

.OVERNIGHT...East to southeast winds 5 to 10 knots, becoming
northeast. Seas 1 to 2 feet. Wave Detail: Northeast to east 1
foot at 4 seconds. Numerous showers and isolated thunderstorms.
.WEDNESDAY...North to northeast winds near 10 knots, increasing
to near 15 knots in the afternoon. Seas 1 to 2 feet, building to
2 to 3 feet. Wave Detail: North to northeast 2 feet at 3 seconds.
Numerous showers and isolated thunderstorms.
.WEDNESDAY NIGHT...Northeast winds 15 to 20 knots, increasing to
20 to 25 knots after midnight. Seas 2 to 4 feet, occasionally to
5 feet, building to 4 to 6 feet, occasionally to 8 feet. Wave
Detail: Northeast 4 feet at 5 seconds, becoming northeast 6 feet
at 6 seconds. Numerous showers and isolated thunderstorms.
.THURSDAY...Northeast winds near 25 knots. Seas 6 to 9 feet,
occasionally to 11 feet. Numerous showers and isolated
thunderstorms.
.THURSDAY NIGHT...Northeast winds near 25 knots. Seas 8 to 11
feet, occasionally to 14 feet. Numerous showers and isolated
thunderstorms.
.FRIDAY...Northeast to east winds near 25 knots. Seas 8 to
11 feet, occasionally to 14 feet. Widespread showers and isolated
thunderstorms.
.FRIDAY NIGHT...Northeast to east winds near 25 knots. Seas 7 to
10 feet, occasionally to 13 feet. Widespread showers and isolated
thunderstorms.
.SATURDAY...Northeast to east winds near 25 knots. Seas 7 to 9
feet, occasionally to 11 feet. Numerous showers and isolated
thunderstorms.
.SATURDAY NIGHT...Northeast to east winds near 25 knots. Seas
9 to 11 feet, occasionally to 14 feet. Numerous showers and
isolated thunderstorms.
.SUNDAY...Northeast to east winds near 25 knots. Seas 8 to
11 feet, occasionally to 14 feet. Scattered showers.
.SUNDAY NIGHT...Northeast winds 20 to 25 knots. Seas 7 to
10 feet, occasionally to 13 feet, subsiding to 4 to 6 feet,
occasionally to 8 feet. Scattered showers.

$$

GMZ033-034-160830-
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-
1029 PM EDT Tue Oct 15 2024

.OVERNIGHT...Variable winds near 5 knots, becoming north to
northeast and increasing to near 10 knots. Seas around 1 foot.
Scattered showers and isolated thunderstorms.
.WEDNESDAY...North to northeast winds 10 to 15 knots, increasing
to 15 to 20 knots in the afternoon. Seas 1 to 2 feet, building to
2 to 3 feet. Wave Detail: North 1 foot at 3 seconds, becoming
northwest to north 3 feet at 4 seconds. Scattered showers and
isolated thunderstorms.
.WEDNESDAY NIGHT...North to northeast winds near 20 knots,
becoming northeast and increasing to near 25 knots. Seas 3 to 5
feet, occasionally to 6 feet, building to 5 to 7 feet,
occasionally to 9 feet. Wave Detail: North 4 feet at 5 seconds,
becoming north to northeast 6 feet at 6 seconds. Isolated showers
and thunderstorms.
.THURSDAY...Northeast winds 20 to 25 knots. Seas 5 to 8 feet,
occasionally to 10 feet. Isolated showers and thunderstorms.
.THURSDAY NIGHT AND FRIDAY...Northeast winds near 25 knots. Seas
5 to 8 feet, occasionally to 10 feet. Scattered showers and
isolated thunderstorms.
.FRIDAY NIGHT...Northeast to east winds near 25 knots. Seas 6 to
8 feet, occasionally to 10 feet. Scattered showers and isolated
thunderstorms.
.SATURDAY AND SATURDAY NIGHT...Northeast to east winds near 25
knots. Seas 6 to 9 feet, occasionally to 11 feet. Scattered
showers and isolated thunderstorms.
.SUNDAY...Northeast to east winds near 25 knots, decreasing to 20
to 25 knots. Seas 5 to 8 feet, occasionally to 10 feet. Isolated
showers.
.SUNDAY NIGHT...Northeast winds 20 to 25 knots. Seas 5 to 7 feet,
occasionally to 9 feet, subsiding to 3 to 5 feet, occasionally to
6 feet. Isolated showers.

$$