National Weather Service Marine Forecast FZUS52 KKEY

FZUS52 KKEY 200832
CWFKEY

Coastal Waters Forecast for the Florida Keys
National Weather Service Key West FL
432 AM EDT Mon Mar 20 2023

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.

GMZ005-201445-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
432 AM EDT Mon Mar 20 2023

SYNOPSIS
A frontal boundary over the Straits of Florida will
result in freshened north to northeast breezes today. Northeast to
east breezes will briefly slacken tonight through Tuesday night,
as high pressure builds across the southeastern United States. As
the high moves into the western North Atlantic, breezes will
freshen again for Wednesday through Friday night.

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

15 NM South of Dry Tortugas Light...on Loggerhead Key.
 6 NM South of Cosgrove Shoal Light...off the Marquesas Keys.
13 NM South of Sand Key Light...off Key West.
37 NM South of Looe Key...off Big Pine Key.
37 NM South of Sombrero Key Light...off Marathon.
94 NM Southeast of Alligator Reef Light...off Islamorada.

Gulf Stream Information Courtesy of the Naval Oceanographic
Office.


GMZ031-201445-
Florida Bay including Barnes Sound, Blackwater Sound, and
Buttonwood Sound-
432 AM EDT Mon Mar 20 2023

SMALL CRAFT ADVISORY IN EFFECT


TODAY
North winds near 20 knots, decreasing to 15 to 20 knots.
Bay waters rough, becoming choppy. Scattered showers.

TONIGHT
North to northeast winds decreasing to near 15 knots.
Bay waters a moderate chop. Isolated showers.

TUESDAY
Northeast to east winds near 15 knots. Bay waters a
moderate chop. Isolated showers.

TUESDAY NIGHT
Northeast to east winds 10 to 15 knots. Bay
waters a light to moderate chop. Isolated showers.

WEDNESDAY
Northeast to east winds near 15 knots. Bay waters a
moderate chop. Isolated showers.

WEDNESDAY NIGHT
Northeast to east winds 15 to 20 knots. Bay
waters choppy.

THURSDAY
East winds 15 to 20 knots. Bay waters choppy.

THURSDAY NIGHT
East to southeast winds 15 to 20 knots,
decreasing to near 15 knots. Bay waters choppy, becoming a
moderate chop.

FRIDAY
Southeast winds 10 to 15 knots. Bay waters a light to
moderate chop.

FRIDAY NIGHT
Southeast winds near 15 knots. Bay waters a moderate
chop. Isolated showers.


GMZ032-035-201445-
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-
432 AM EDT Mon Mar 20 2023

SMALL CRAFT ADVISORY IN EFFECT


TODAY
North winds near 20 knots, decreasing to 15 to 20 knots.
Seas 3 to 5 feet, except 5 to 6 feet west of the Marquesas Keys.
Nearshore waters rough, becoming choppy. Scattered showers.

TONIGHT
North to northeast winds 15 to 20 knots, decreasing to
near 15 knots. Seas 2 to 4 feet, except 3 to 5 feet west of the
Marquesas Keys. Nearshore waters choppy, becoming a moderate chop.
Isolated showers.

TUESDAY
Northeast to east winds near 15 knots. Seas 2 to
3 feet, except 3 to 4 feet west of the Marquesas Keys. Nearshore
waters a moderate chop. Isolated showers.

TUESDAY NIGHT
Northeast to east winds near 15 knots. Seas 1 to
2 feet, except 2 to 3 feet west of the Marquesas Keys. Nearshore
waters a moderate chop. Isolated showers.

WEDNESDAY
Northeast to east winds 15 to 20 knots. Seas 1 to 2
feet. Nearshore waters choppy. Isolated showers.

WEDNESDAY NIGHT
Northeast to east winds 15 to 20 knots. Seas 2
to 3 feet. Nearshore waters choppy.

THURSDAY
East winds 15 to 20 knots. Seas 2 to 3 feet.
Nearshore waters choppy.

THURSDAY NIGHT
East to southeast winds 15 to 20 knots. Seas 2
to 3 feet. Nearshore waters choppy.

FRIDAY
Southeast winds near 15 knots. Seas 1 to 3 feet, except
2 to 4 feet west of the Marquesas Keys. Nearshore waters a moderate
chop.

FRIDAY NIGHT
Southeast winds near 15 knots. Seas 1 to 3 feet.
Nearshore waters a moderate chop. Isolated showers.


GMZ042>044-201445-
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-
432 AM EDT Mon Mar 20 2023

SMALL CRAFT ADVISORY IN EFFECT


TODAY
North winds near 20 knots, decreasing to 15 to 20 knots.
Seas 3 to 4 feet, except 4 to 6 feet west of Cosgrove Shoal
Light. Nearshore waters rough, becoming choppy. Scattered showers.

TONIGHT
North to northeast winds 15 to 20 knots, decreasing to
near 15 knots. Seas 2 to 4 feet, except 3 to 5 feet west of
Cosgrove Shoal Light. Nearshore waters choppy, becoming a
moderate chop. Isolated showers.

TUESDAY AND TUESDAY NIGHT
Northeast to east winds near 15
knots. Seas 2 to 3 feet, except 3 to 4 feet west of Cosgrove Shoal
Light. Nearshore waters a moderate chop. Isolated showers.

WEDNESDAY
Northeast to east winds near 15 knots, increasing to
15 to 20 knots. Seas 2 to 4 feet. Nearshore waters a moderate
chop, becoming choppy. Isolated showers.

WEDNESDAY NIGHT
Northeast to east winds 15 to 20 knots. Seas
2 to 4 feet, except 3 to 5 feet west of Cosgrove Shoal Light.
Nearshore waters choppy.

THURSDAY
East winds 15 to 20 knots. Seas 2 to 4 feet, except
4 to 5 feet west of Cosgrove Shoal Light. Nearshore waters
choppy.

THURSDAY NIGHT
East to southeast winds 15 to 20 knots. Seas 3
to 5 feet. Nearshore waters choppy.

FRIDAY
Southeast winds near 15 knots, decreasing to 10 to 15
knots. Seas subsiding to 2 to 4 feet. Nearshore waters a moderate
chop, becoming a light to moderate chop.

FRIDAY NIGHT
Southeast winds 10 to 15 knots. Seas 2 to 3 feet.
Nearshore waters a light to moderate chop. Isolated showers.


GMZ052>055-072>075-201445-
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-
432 AM EDT Mon Mar 20 2023

SMALL CRAFT ADVISORY IN EFFECT


TODAY
North winds near 20 knots. Seas 5 to 8 feet. Scattered
showers and isolated thunderstorms.

TONIGHT
North to northeast winds 15 to 20 knots, decreasing to
near 15 knots. Seas subsiding to 4 to 7 feet. Isolated showers
and thunderstorms.

TUESDAY
Northeast to east winds near 15 knots. Seas 3 to
5 feet. Isolated showers.

TUESDAY NIGHT AND WEDNESDAY
Northeast to east winds 15 to 20
knots. Seas 4 to 5 feet. Isolated showers.

WEDNESDAY NIGHT
Northeast to east winds 15 to 20 knots. Seas
building to 5 to 6 feet. Isolated showers.

THURSDAY
Northeast to east winds 15 to 20 knots. Seas 4 to 6
feet.

THURSDAY NIGHT
East to southeast winds 15 to 20 knots. Seas 4
to 6 feet.

FRIDAY
East to southeast winds near 15 knots. Seas 3 to
5 feet.

FRIDAY NIGHT
Southeast winds near 15 knots. Seas 3 to 4 feet.
Isolated showers.


GMZ033-034-201445-
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-
432 AM EDT Mon Mar 20 2023

SMALL CRAFT ADVISORY IN EFFECT


TODAY
North winds near 20 knots. Seas 4 to 6 feet. Isolated
showers.

TONIGHT
North to northeast winds 15 to 20 knots. Seas 3 to 5
feet.

TUESDAY
Northeast winds 15 to 20 knots, becoming northeast to
east and decreasing to 10 to 15 knots in the afternoon. Seas
subsiding to 2 to 4 feet.

TUESDAY NIGHT
Northeast to east winds 10 to 15 knots,
increasing to near 15 knots. Seas 2 to 3 feet. Isolated showers.

WEDNESDAY
East winds near 15 knots. Seas 2 to 4 feet.

WEDNESDAY NIGHT AND THURSDAY
East winds 15 to 20 knots. Seas 2
to 4 feet.

THURSDAY NIGHT
East to southeast winds 15 to 20 knots. Seas
3 to 4 feet.

FRIDAY
East to southeast winds decreasing to near 15 knots.
Seas 2 to 4 feet.

FRIDAY NIGHT
Southeast winds 10 to 15 knots. Seas 2 to 3 feet.
Isolated showers.

KR