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National Weather Service Marine Forecast FZUS52 KKEY

FZUS52 KKEY 261419
CWFKEY

Coastal Waters Forecast for the Florida Keys
National Weather Service Key West FL
1019 AM EDT Tue Oct 26 2021

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.

GMZ005-262030-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
1019 AM EDT Tue Oct 26 2021

SYNOPSIS
A low pressure system developing near the Carolina
coast will support light west to northwest breezes across the
Florida Keys through Wednesday. With that said, a subtle wind
surge is expected off of the Upper Keys this afternoon and
evening. A frontal boundary will approach Florida as early as
Wednesday night resulting in freshening southwest to westerly
breezes, and Cautions and Small Craft Advisories may be required
for portions of the Keys as early as Thursday. Fresh breezes will
persist through Friday night and Saturday, likely diminishing
Saturday night.

The Approximate Shoreward Edge of the Gulf Stream as of
October 25...

31 NM South of Dry Tortugas Light...on Loggerhead Key.
15 NM South of Cosgrove Shoal Light...off the Marquesas Keys.
14 NM South of Sand Key Light...off Key West.
20 NM South of Looe Key...off Big Pine Key.
24 NM South of Sombrero Key Light...off Marathon.
28 NM Southeast of Alligator Reef Light...off Islamorada.
22 NM Southeast of Molasses Reef Light...off Key Largo.
11 NM East of Carysfort Reef Light...off Ocean Reef.

Gulf Stream Information Courtesy of the Naval Oceanographic Office.



GMZ031-262030-
Florida Bay including Barnes Sound, Blackwater Sound, and
Buttonwood Sound-
1019 AM EDT Tue Oct 26 2021

THIS AFTERNOON
West winds near 10 knots, increasing to 10 to
15 knots. Bay waters a light chop, becoming a light to moderate
chop. Isolated showers.

TONIGHT
Northwest winds decreasing to 5 to 10 knots. Bay
waters becoming smooth to a light chop. Isolated showers.

WEDNESDAY
Northwest winds 5 to 10 knots, becoming southwest to
west in the afternoon. Bay waters smooth to a light chop.
Isolated showers.

WEDNESDAY NIGHT
Southwest to west winds near 5 knots, becoming
south to southwest and increasing to 5 to 10 knots after
midnight. Bay waters smooth to a light chop. Scattered showers and
isolated thunderstorms.

THURSDAY
Southwest winds increasing to 15 to 20 knots. Bay
waters becoming choppy. Numerous showers and isolated
thunderstorms.

THURSDAY NIGHT
Southwest to west winds 15 to 20 knots. Bay
waters choppy. Numerous showers and isolated thunderstorms.

FRIDAY AND FRIDAY NIGHT
West winds 15 to 20 knots. Bay waters
choppy. Isolated showers.

SATURDAY
West to northwest winds 15 to 20 knots. Bay waters
choppy. Isolated showers.

SATURDAY NIGHT
Northwest winds decreasing to 10 to 15 knots.
Bay waters becoming a light to moderate chop. Isolated showers.



GMZ032-035-262030-
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-
1019 AM EDT Tue Oct 26 2021

THIS AFTERNOON
West to northwest winds near 10 knots. Seas 1
foot or less. Nearshore waters a light chop. Isolated showers.

TONIGHT
Northwest winds 5 to 10 knots. Seas 1 foot or less.
Nearshore waters smooth to a light chop. Isolated showers.

WEDNESDAY
Northwest winds near 5 knots, becoming southwest to
west in the afternoon. Seas 1 foot or less. Nearshore waters
smooth. Isolated showers.

WEDNESDAY NIGHT
Southwest to west winds near 5 knots, becoming
south and increasing to 10 to 15 knots after midnight. Seas 1
foot or less. Nearshore waters smooth, becoming a light to
moderate chop. Scattered showers and isolated thunderstorms.

THURSDAY
Southwest winds increasing to 15 to 20 knots. Seas 1
to 3 feet. Nearshore waters becoming choppy. Numerous showers and
isolated thunderstorms.

THURSDAY NIGHT
Southwest to west winds 15 to 20 knots. Seas
2 to 4 feet. Nearshore waters choppy. Numerous showers and
isolated thunderstorms.

FRIDAY
West winds increasing to near 20 knots. Seas 2 to 5
feet. West of the Marquesas Keys, seas 5 to 7 feet, building to 7
to 9 feet. Nearshore waters becoming rough. Isolated showers.

FRIDAY NIGHT
West winds near 20 knots. Seas 3 to 6 feet,
except 7 to 10 feet west of the Marquesas Keys. Nearshore waters
rough. Isolated showers.

SATURDAY
West to northwest winds 15 to 20 knots. Seas 3 to
6 feet. West of the Marquesas Keys, seas 7 to 9 feet, subsiding
to 6 to 7 feet. Nearshore waters choppy. Isolated showers.

SATURDAY NIGHT
Northwest winds decreasing to 10 to 15 knots.
Seas 2 to 5 feet, except 4 to 6 feet west of the Marquesas Keys.
Nearshore waters becoming a light to moderate chop. Isolated
showers.



GMZ042>044-262030-
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-
1019 AM EDT Tue Oct 26 2021

THIS AFTERNOON
West to northwest winds near 10 knots, except
increasing to near 15 knots off of the Upper Keys. Seas around 1
foot. Nearshore waters a light to moderate chop. Isolated showers.

TONIGHT
Northwest winds decreasing to near 10 knots. Seas
around 1 foot. Nearshore waters becoming a light chop. Isolated
showers.

WEDNESDAY
Northwest winds 5 to 10 knots, becoming southwest
to west in the afternoon. Seas 1 foot or less. Nearshore waters
smooth to a light chop. Isolated showers.

WEDNESDAY NIGHT
Southwest winds 5 to 10 knots, becoming south
and increasing to 10 to 15 knots after midnight. Seas 1 to 2 feet.
Nearshore waters smooth to a light chop, becoming a light to
moderate chop. Scattered showers and isolated thunderstorms.

THURSDAY
Southwest winds increasing to 15 to 20 knots. Seas 2
to 4 feet. Nearshore waters becoming choppy. Numerous showers and
isolated thunderstorms.

THURSDAY NIGHT
Southwest to west winds 15 to 20 knots. Seas 2
to 4 feet. Nearshore waters choppy. Numerous showers and isolated
thunderstorms.

FRIDAY
West winds increasing to near 20 knots. Seas 2 to 4
feet, except building to 4 to 7 feet west of Cosgrove Shoal
Light. Nearshore waters becoming rough. Isolated showers.

FRIDAY NIGHT
West winds near 20 knots. Seas 2 to 5 feet,
except 7 to 9 feet west of Cosgrove Shoal Light. Nearshore waters
rough. Isolated showers.

SATURDAY
West to northwest winds 15 to 20 knots. Seas 2 to
5 feet. West of Cosgrove Shoal Light, seas 7 to 9 feet, subsiding
to 6 to 7. Nearshore waters choppy. Isolated showers.

SATURDAY NIGHT
Northwest winds decreasing to 10 to 15 knots.
Seas 2 to 4 feet, except 4 to 6 feet west of Cosgrove Shoal Light.
Nearshore waters becoming a light to moderate chop. Isolated
showers.



GMZ052>055-072>075-262030-
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-
1019 AM EDT Tue Oct 26 2021

THIS AFTERNOON
West winds near 10 knots, except increasing to
10 to 15 knots off of the Upper Keys. Seas around 1 foot, except
building to 1 to 2 feet off of the Upper Keys. Isolated showers.

TONIGHT
Northwest winds decreasing to 5 to 10 knots. Seas 1 to
2 feet. Isolated showers.

WEDNESDAY
Northwest to north winds 5 to 10 knots, becoming
west in the late morning and afternoon. Seas 1 foot or less.
Isolated showers.

WEDNESDAY NIGHT
West winds 5 to 10 knots, becoming south and
increasing to 10 to 15 knots in the late evening and overnight.
Seas 1 to 2 feet. Scattered showers and isolated thunderstorms.

THURSDAY
South to southwest winds increasing to 15 to 20
knots. Seas building to 2 to 4 feet. Numerous showers and isolated
thunderstorms.

THURSDAY NIGHT
Southwest to west winds 15 to 20 knots. Seas
building to 3 to 5 feet. Numerous showers and isolated
thunderstorms.

FRIDAY
West winds 15 to 20 knots. Seas 5 to 8 feet. Scattered
showers.

FRIDAY NIGHT
West winds near 20 knots. Seas 5 to 9 feet.
Isolated showers.

SATURDAY
West to northwest winds 15 to 20 knots. Seas 5 to
9 feet. Isolated showers.

SATURDAY NIGHT
Winds becoming northwest and decreasing to 10 to
15 knots. Seas subsiding to 3 to 6 feet. Isolated showers.



GMZ033-034-262030-
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-
1019 AM EDT Tue Oct 26 2021

THIS AFTERNOON
West to northwest winds near 10 knots. Seas 1
to 2 feet. Isolated showers.

TONIGHT
Northwest winds 5 to 10 knots. Seas 1 to 2 feet.
Isolated showers.

WEDNESDAY
West to northwest winds near 5 knots, becoming
southwest to west in the afternoon. Seas around 1 foot. Isolated
showers.

WEDNESDAY NIGHT
South winds increasing to 10 to 15 knots. Seas
building to 1 to 2 feet. Scattered showers and isolated
thunderstorms.

THURSDAY
Southwest winds increasing to 15 to 20 knots. Seas 1
to 3 feet, building to 3 to 5 feet. Widespread showers and
isolated thunderstorms.

THURSDAY NIGHT
Southwest to west winds 15 to 20 knots. Seas 4
to 6 feet. Scattered showers and isolated thunderstorms.

FRIDAY
West winds near 20 knots. Seas 6 to 10 feet. Isolated
showers.

FRIDAY NIGHT
West winds near 20 knots. Seas 7 to 11 feet.
Isolated showers.

SATURDAY
West to northwest winds 15 to 20 knots. Seas 6 to 10
feet, subsiding to 6 to 8 feet. Isolated showers.

SATURDAY NIGHT
Northwest winds 10 to 15 knots. Seas subsiding
to 4 to 6 feet. Isolated showers.