979
FZUS52 KKEY 111425
CWFKEY

Coastal Waters Forecast for the Florida Keys
National Weather Service Key West FL
1025 AM EDT Tue Mar 11 2025

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.

GMZ005-112030-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
1025 AM EDT Tue Mar 11 2025

.SYNOPSIS...Fresh northwesterly breezes in the wake of the cold
frontal passage yesterday evening will continue to gradually
slacken thorugh this afternoon. High pressure over the Gulf will
slide eastward throughout the work week, with gentle to moderate
breezes clocking around to the northeast, then east, and then to
southeast. As a second, stronger high builds in the western North
Atlantic, southeasterly breezes will freshen for Saturday and
Saturday night.

The Approximate Shoreward Edge of the Gulf Stream as of March
8...

35 NM South of Dry Tortugas Light...on Loggerhead Key.
19 NM South of Cosgrove Shoal Light...off the Marquesas Keys.
16 NM South of Sand Key Light...off Key West.
 8 NM South of Looe Key...off Big Pine Key.
 8 NM South of Sombrero Key Light...off Marathon.
 7 NM Southeast of Alligator Reef Light...off Islamorada.
 6 NM Southeast of Molasses Reef Light...off Key Largo.
 3 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 and
NASA SPoRT.

$$

GMZ031-112030-
Florida Bay including Barnes Sound, Blackwater Sound, and
Buttonwood Sound-
1025 AM EDT Tue Mar 11 2025

...SMALL CRAFT SHOULD EXERCISE CAUTION UNTIL WINDS DECREASE...

.TODAY...Northwest to north winds 15 to 20 knots, decreasing to
near 10 knots. Bay waters choppy, becoming a light chop.
.TONIGHT...Northwest to north winds near 10 knots, becoming north
to northeast. Bay waters a light chop.
.WEDNESDAY...North to northeast winds 5 to 10 knots, becoming east
to southeast. Bay waters smooth to a light chop.
.WEDNESDAY NIGHT...East to southeast winds near 10 knots. Bay
waters a light chop.
.THURSDAY...Southeast winds 10 to 15 knots, decreasing to near 10
knots. Bay waters a light to moderate chop, becoming a light chop.
.THURSDAY NIGHT...Southeast winds 5 to 10 knots. Bay waters
smooth to a light chop.
.FRIDAY...Southeast winds near 10 knots. Bay waters a light chop.
.FRIDAY NIGHT...East to southeast winds 10 to 15 knots, increasing
to near 15 knots. Bay waters a light to moderate chop, becoming a
moderate chop.
.SATURDAY AND SATURDAY NIGHT...Southeast winds 15 to 20 knots. Bay
waters choppy. Isolated showers.

$$

GMZ032-035-112030-
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-
1025 AM EDT Tue Mar 11 2025

...SMALL CRAFT SHOULD EXERCISE CAUTION UNTIL WINDS DECREASE...

.TODAY...Northwest to north winds 15 to 20 knots, decreasing to
10 to 15 knots. Seas 2 to 4 feet, occasionally to 5 feet,
subsiding to 2 to 3 feet. West of the Marquesas Keys, seas 4 to 6
feet, occasionally to 8 feet, subsiding to 3 to 4 feet,
occasionally to 5 feet. Nearshore waters choppy, becoming a light
to moderate chop.
.TONIGHT....Northwest to north winds 10 to 15 knots, becoming
north to northeast and decreasing to near 10 knots. Seas 2 to 3
feet, subsiding to 1 to 2 feet. West of the Marquesas Keys, seas 3
to 4 feet, occasionally to 5 feet, subsiding to 2 to 3 feet.
Nearshore waters a light to moderate chop, becoming a light chop.
.WEDNESDAY...North to northeast winds 5 to 10 knots, becoming east
to southeast. Seas 1 to 2 feet, except around 2 feet west of the
Marquesas Keys. Nearshore waters smooth to a light chop.
.WEDNESDAY NIGHT...East to southeast winds near 10 knots. Seas 1
to 2 feet. Nearshore waters a light chop.
.THURSDAY....Southeast winds 10 to 15 knots, decreasing to near 10
knots. Seas 1 to 2 feet. Nearshore waters a light to moderate
chop, becoming a light chop.
.THURSDAY NIGHT AND FRIDAY...East to southeast winds 5 to 10
knots. Seas around 1 foot. Nearshore waters smooth to a light
chop.
.FRIDAY NIGHT...East to southeast winds near 10 knots, becoming
southeast and increasing to near 15 knots. Seas 1 to 2 feet,
except building to 2 to 3 feet west of the Marquesas Keys.
Nearshore waters a light chop, becoming a moderate chop.
.SATURDAY...Southeast winds 15 to 20 knots. Seas 1 to 2 feet,
except 2 to 3 feet west of the Marquesas Keys. Nearshore waters
choppy. Isolated showers.
.SATURDAY NIGHT...Southeast winds 15 to 20 knots. Seas 2 to
3 feet, except 3 to 4 feet, occasionally to 5 feet west of the
Marquesas Keys. Nearshore waters choppy. Isolated showers.

$$

GMZ042>044-112030-
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-
1025 AM EDT Tue Mar 11 2025

...SMALL CRAFT SHOULD EXERCISE CAUTION UNTIL WINDS DECREASE...

.TODAY...Northwest to north winds 15 to 20 knots, decreasing to
10 to 15 knots. Seas 2 to 4 feet, occasionally to 5 feet,
subsiding to 2 to 3 feet. West of Cosgrove Shoal Light, seas 4 to
6 feet, occasionally to 8 feet, subsiding 3 to 4 feet,
occasionally to 5 feet. Nearshore waters choppy, becoming a light
to moderate chop.
.TONIGHT...Northwest to north winds 10 to 15 knots, becoming
north to northeast and decreasing to near 10 knots. Seas subsiding
to 1 to 2 feet, except subsiding to 2 to 3 feet west of Cosgrove
Shoal Light. Nearshore waters a light to moderate chop, becoming a
light chop.
.WEDNESDAY...Northeast winds 5 to 10 knots, becoming east to
southeast. Seas 1 to 2 feet, except 2 to 3 feet west of Cosgrove
Shoal Light. Nearshore waters smooth to a light chop.
.WEDNESDAY NIGHT...East to southeast winds near 10 knots,
increasing to 10 to 15 knots. Seas 1 to 3 feet. Nearshore waters
a light chop, becoming a light to moderate chop.
.THURSDAY...Southeast winds 10 to 15 knots, decreasing to near 10
knots. Seas 2 to 3 feet, subsiding to around 2 feet. Nearshore
waters a light to moderate chop, becoming a light chop.
.THURSDAY NIGHT...East to southeast winds 5 to 10 knots. Seas
1 to 2 feet. Nearshore waters smooth to a light chop.
.FRIDAY...East to southeast winds 5 to 10 knots, increasing to
near 10 knots. Seas 1 to 2 feet. Nearshore waters smooth to a
light chop, becoming a light chop.
.FRIDAY NIGHT....East to southeast winds near 10 knots, becoming
southeast and increasing to near 15 knots. Seas 1 to 2 feet,
building to 2 to 3 feet. Nearshore waters a light chop, becoming
a moderate chop.
.SATURDAY...Southeast winds 15 to 20 knots. Seas 2 to 4 feet,
occasionally to 5 feet. Nearshore waters choppy. Isolated
showers.
.SATURDAY NIGHT...Southeast winds near 20 knots. Seas 3 to 5
feet, occasionally to 6 feet. Nearshore waters rough. Isolated
showers.

$$

GMZ052>055-072>075-112030-
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-
1025 AM EDT Tue Mar 11 2025

...SMALL CRAFT SHOULD EXERCISE CAUTION UNTIL WINDS DECREASE...

.TODAY...Northwest to north winds 15 to 20 knots, decreasing to
10 to 15 knots. Seas 4 to 7 feet, occasionally to 9 feet,
subsiding to 3 to 5 feet, occasionally to 6 feet. Wave Detail:
West to northwest 7 feet at 10 seconds and northwest 5 feet at 4
seconds.
.TONIGHT...North winds near 10 knots, becoming north to northeast.
Seas 3 to 5 feet, occasionally to 6 feet, subsiding to 3 to 4
feet, occasionally to 5 feet. Wave Detail: West to northwest 5
feet at 9 seconds and northeast to east 3 feet at 8 seconds.
.WEDNESDAY...Northeast winds 5 to 10 knots, becoming east to
southeast. Seas 3 to 4 feet, occasionally to 5 feet, subsiding to
2 to 3 feet. Wave Detail: Northeast to east 3 feet at 8 seconds
and west to northwest 3 feet at 8 seconds.
.WEDNESDAY NIGHT...East to southeast winds near 10 knots, increasing
to 10 to 15 knots. Seas 2 to 3 feet.
.THURSDAY...Southeast winds 10 to 15 knots, decreasing to near 10
knots. Seas 2 to 3 feet.
.THURSDAY NIGHT AND FRIDAY...East to southeast winds near 10
knots. Seas around 2 feet.
.FRIDAY NIGHT...East to southeast winds 10 to 15 knots, increasing
to 15 to 20 knots. Seas 2 to 3 feet, building to 3 to 4 feet,
occasionally to 5 feet.
.SATURDAY...Southeast winds 15 to 20 knots. Seas 3 to 5 feet,
occasionally to 6 feet. Isolated showers.
.SATURDAY NIGHT...Southeast winds near 20 knots. Seas 4 to 6
feet, occasionally to 8 feet. Isolated showers.

$$

GMZ033-034-112030-
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-
1025 AM EDT Tue Mar 11 2025

...SMALL CRAFT SHOULD EXERCISE CAUTION UNTIL WINDS DECREASE...

.TODAY...Northwest to north winds 15 to 20 knots, decreasing to
10 to 15 knots. Seas 5 to 7 feet, occasionally to 9 feet,
subsiding to 4 to 5 feet, occasionally to 6 feet. Wave Detail:
Northwest 7 feet at 9 seconds, becoming northwest 5 feet at 8
seconds.
.TONIGHT...Northwest to north winds 10 to 15 knots, becoming north
to northeast and decreasing to near 10 knots. Seas 3 to 4 feet,
occasionally to 5 feet, subsiding to 2 to 3 feet. Wave Detail:
Northwest 4 feet at 8 seconds.
.WEDNESDAY...Northeast winds near 10 knots, becoming east and
decreasing to 5 to 10 knots. Seas 2 to 3 feet, subsiding to around
2 feet. Wave Detail: West to northwest 3 feet at 7 seconds.
.WEDNESDAY NIGHT...East to southeast winds 5 to 10 knots,
increasing to near 10 knots. Seas 1 to 2 feet.
.THURSDAY...Southeast winds near 10 knots, becoming southeast to
south and increasing to 10 to 15 knots. Seas 1 to 2 feet, building
to around 2 feet.
.THURSDAY NIGHT...East to southeast winds near 10 knots, decreasing
to 5 to 10 knots. Seas 1 to 2 feet, subsiding to around 1 foot.
.FRIDAY...East to southeast winds 5 to 10 knots. Seas around
1 foot.
.FRIDAY NIGHT...East to southeast winds 5 to 10 knots, becoming
southeast and increasing to near 15 knots. Seas around 1 foot,
building to 1 to 2 feet.
.SATURDAY...Southeast winds near 15 knots, increasing to 15 to 20
knots. Seas 2 to 3 feet, building to 3 to 4 feet, occasionally to
5 feet.
.SATURDAY NIGHT...Southeast winds 15 to 20 knots. Seas 3 to 4
feet, occasionally to 5 feet. Isolated showers.

$$

AP/BT