386
FZUS52 KKEY 062127
CWFKEY

Coastal Waters Forecast for the Florida Keys
National Weather Service Key West FL
427 PM EST Sat Dec 6 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.

GMZ005-070930-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
427 PM EST Sat Dec 6 2025

.SYNOPSIS...The Florida Keys will lie in a col region through
Sunday. This will promote mainly light to gentle southeast
breezes, occasionally becoming variable. Thereafter, a developing
weather system will move out of the Central Plains and into the
Southeast U.S. by Sunday evening. The attendent cold front will
sweep through Monday night with a brief period of moderate to
fresh breezes. Shower coverage will steadily increase starting
today and continuing into early next week.

The Approximate Shoreward Edge of the Gulf Stream as of December 4...

21 NM South of Dry Tortugas Light...on Loggerhead Key.
21 NM South of Cosgrove Shoal Light...off the Marquesas Keys.
22 NM South of Sand Key Light...off Key West.
15 NM South of Looe Key...off Big Pine Key.
 8 NM Southeast of Sombrero Key Light...off Marathon.
 6 NM Southeast of Alligator Reef Light...off Islamorada.
 3 NM Southeast of Molasses Reef Light...off Key Largo.
 1 NM Southeast of Carysfort Reef Light...off Ocean Reef.

Gulf Stream Information Courtesy of the National Weather Service in
Key West based on products from NASA SPoRT.

$$

GMZ031-070930-
Florida Bay including Barnes Sound, Blackwater Sound, and
Buttonwood Sound-
427 PM EST Sat Dec 6 2025

.TONIGHT...South winds near 5 knots, becoming east to southeast.
Bay waters smooth. Isolated showers.
.SUNDAY...East to southeast winds 5 to 10 knots, becoming
southeast to south near 5 knots. Bay waters smooth to a light
chop, becoming smooth. Isolated showers.
.SUNDAY NIGHT...South to southwest winds near 5 knots, becoming
southwest to west 5 to 10 knots. Bay waters smooth, becoming smooth
to a light chop. Scattered showers.
.MONDAY...Southwest to west winds near 10 knots, becoming west 10
to 15 knots in the afternoon. Bay waters a light chop, becoming a
light to moderate chop. Scattered showers.
.MONDAY NIGHT...West to northwest winds 10 to 15 knots, becoming
north near 15 knots. Bay waters a light to moderate chop, becoming
a moderate chop. Isolated showers.
.TUESDAY...North to northeast winds near 15 knots, briefly
decreasing to 5 to 10 knots in the afternoon. Bay waters a
moderate chop, becoming smooth to a light chop. Scattered showers.
.TUESDAY NIGHT...Northeast winds increasing to near 10 knots. Bay
waters becoming a light chop. Scattered showers.
.WEDNESDAY...Northeast winds near 10 knots. Bay waters a light
chop. Isolated showers.
.WEDNESDAY NIGHT...Northwest to north winds near 10 knots. Bay
waters a light chop. Isolated showers.
.THURSDAY...Northwest to north winds 5 to 10 knots. Bay waters
smooth to a light chop. Isolated showers.
.THURSDAY NIGHT...North to northeast winds 5 to 10 knots. Bay
waters smooth to a light chop. Isolated showers.

$$

GMZ032-035-070930-
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-
427 PM EST Sat Dec 6 2025

.TONIGHT...East to southeast winds near 5 knots. Seas 1 foot or
less. Nearshore waters smooth. Isolated showers.
.SUNDAY...East to southeast winds 5 to 10 knots, becoming
southeast to south near 5 knots. Seas 1 foot or less. Nearshore
waters smooth to a light chop, becoming smooth. Isolated showers.
.SUNDAY NIGHT...South to southwest winds near 5 knots, becoming
southwest to west 5 to 10 knots. Seas 1 foot or less. Nearshore
waters smooth, becoming smooth to a light chop. Scattered
showers.
.MONDAY...Southwest to west winds near 10 knots, becoming west to
northwest to 10 to 15 knots. Seas building to 1 to 2 feet, except
building to 2 to 3 feet west of the Marquesas Keys. Nearshore
waters a light chop, becoming a light to moderate chop. Scattered
showers.
.MONDAY NIGHT...Northwest winds 10 to 15 knots, becoming north
to northeast near 15 knots. Seas 1 to 2 feet, except 2 to 3 feet
west of the Marquesas Keys. Nearshore waters a light to moderate
chop, becoming a moderate chop. Isolated showers.
.TUESDAY...North to northeast winds near 15 knots, 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, subsiding to 2 to 3 feet.
Nearshore waters a moderate chop, becoming a light chop. Isolated
showers.
.TUESDAY NIGHT...Northeast winds 10 to 15 knots. Seas 1 to 2
feet, except 2 to 3 feet west of the Marquesas Keys. Nearshore
waters a light to moderate chop. Isolated showers.
.WEDNESDAY...North to northeast winds near 10 knots. Seas 1 to 2
feet. Nearshore waters a light chop. Isolated showers.
.WEDNESDAY NIGHT...North winds near 10 knots. Seas subsiding to
around 1 foot. Nearshore waters a light chop. Isolated showers.
.THURSDAY...North winds 5 to 10 knots. Seas around 1 foot.
Nearshore waters smooth to a light chop. Isolated showers.
.THURSDAY NIGHT...North to northeast winds 5 to 10 knots. Seas
1 foot or less. Nearshore waters smooth to a light chop. Isolated
showers.

$$

GMZ042>044-070930-
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-
427 PM EST Sat Dec 6 2025

.TONIGHT...East to southeast winds 5 to 10 knots. Seas around 1
foot. Nearshore waters smooth to a light chop. Isolated showers.
.SUNDAY...East to southeast winds 5 to 10 knots, becoming
southeast to south in the afternoon. Seas around 1 foot.
Nearshore waters smooth to a light chop. Isolated showers.
.SUNDAY NIGHT...South to southwest winds 5 to 10 knots, becoming
southwest to west near 10 knots. Seas around 1 foot. Nearshore
waters smooth to a light chop, becoming a light chop. Scattered
showers.
.MONDAY...Southwest to west winds 10 to 15 knots, becoming west to
northwest near 15 knots. Seas building to 1 to 2 feet, except
building to 2 to 3 feet west of Cosgrove Shoal Light. Nearshore
waters a light to moderate chop, becoming a moderate chop.
Scattered showers.
.MONDAY NIGHT...Northwest winds near 15 knots, becoming north to
northeast. Seas 1 to 2 feet, except 2 to 3 feet west of Cosgrove
Shoal Light. Nearshore waters a moderate chop. Isolated showers.
.TUESDAY...Northeast winds near 15 knots, decreasing to 10 to 15
knots. Seas 1 to 2 feet, except 3 to 4 feet, occasionally to 5
feet west of Cosgrove Shoal Light. Nearshore waters a moderate
chop, becoming a light to moderate chop. Scattered showers.
.TUESDAY NIGHT...Northeast winds 10 to 15 knots. Seas 1 to
2 feet, except 2 to 3 feet west of Cosgrove Shoal Light.
Nearshore waters a light to moderate chop. Scattered showers.
.WEDNESDAY...Northeast winds 10 to 15 knots. Seas 1 to 2 feet,
except 2 to 3 feet west of Cosgrove Shoal Light. Nearshore waters
a light to moderate chop. Isolated showers.
.WEDNESDAY NIGHT...Northwest to north winds near 10 knots. Seas 1
to 2 feet. Nearshore waters a light chop. Isolated showers.
.THURSDAY...North to northeast winds near 10 knots. Seas 1 to 2
feet. Nearshore waters a light chop. Isolated showers.
.THURSDAY NIGHT...Northeast winds near 10 knots. Seas 1 to 2 feet.
Nearshore waters a light chop. Isolated showers.

$$

GMZ052>055-072>075-070930-
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-
427 PM EST Sat Dec 6 2025

.TONIGHT...East to southeast winds 5 to 10 knots. Seas around
1 foot. Wave Detail: East to southeast 1 foot at 4 seconds.
Isolated showers.
.SUNDAY...Southeast winds near 10 knots, decreasing to 5 to 10
knots. Seas 1 to 2 feet. Wave Detail: East to southeast 1 foot at
4 seconds. Isolated showers.
.SUNDAY NIGHT...Southeast to south winds 5 to 10 knots, becoming
southwest to west near 10 knots. Seas around 1 foot. Wave Detail:
Southeast 1 foot at 3 seconds. Scattered showers.
.MONDAY...Southwest to west winds 10 to 15 knots, becoming west to
northwest near 15 knots. Seas 1 to 2 feet, building to 2 to 3 feet.
Scattered showers.
.MONDAY NIGHT...Northwest to north winds near 15 knots, becoming
north to northeast. Seas 2 to 3 feet. Scattered showers.
.TUESDAY...Northeast winds near 15 knots, decreasing to 10 to 15
knots. Seas 2 to 4 feet, occasionally to 5 feet. Scattered
showers.
.TUESDAY NIGHT...Northeast winds 10 to 15 knots. Seas 2 to
4 feet, occasionally to 5 feet. Scattered showers.
.WEDNESDAY...Northeast winds 10 to 15 knots. Seas subsiding to 2
to 3 feet. Scattered showers.
.WEDNESDAY NIGHT...Northwest to north winds near 10 knots. Seas
subsiding to around 2 feet. Scattered showers.
.THURSDAY...North to northeast winds near 10 knots. Seas 1 to
2 feet. Isolated showers.
.THURSDAY NIGHT...Northeast winds 10 to 15 knots. Seas 1 to
2 feet. Isolated showers.

$$

GMZ033-034-070930-
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-
427 PM EST Sat Dec 6 2025

.TONIGHT...East to southeast winds near 5 knots. Seas 1 foot or
less. Wave Detail: East to southeast 1 foot at 3 seconds.
Isolated showers.
.SUNDAY...East to southeast winds 5 to 10 knots, becoming
southeast to south. Seas around 1 foot. Wave Detail: East to
southeast 1 foot at 2 seconds and northwest 1 foot at 5 seconds.
Scattered showers.
.SUNDAY NIGHT...Southwest winds 5 to 10 knots, becoming southwest
to west near 10 knots. Seas around 1 foot. Wave Detail: South to
southwest 1 foot at 3 seconds and northwest 1 foot at 5 seconds.
Scattered showers.
.MONDAY...Southwest to west winds 10 to 15 knots, becoming west to
northwest. Seas 1 to 2 feet, building to 2 to 3 feet. Scattered
showers.
.MONDAY NIGHT...Northwest to north winds 10 to 15 knots, becoming
north to northeast 15 to 20 knots. Seas building to 2 to 4 feet,
occasionally to 5 feet. Isolated showers.
.TUESDAY...Northeast winds 15 to 20 knots, decreasing to 10 to 15
knots. Seas 2 to 4 feet, occasionally to 5 feet. Isolated
showers.
.TUESDAY NIGHT...North to northeast winds 10 to 15 knots. Seas
2 to 4 feet, occasionally to 5 feet. Isolated showers.
.WEDNESDAY...North to northeast winds 10 to 15 knots. Seas 2 to
3 feet. Isolated showers.
.WEDNESDAY NIGHT...Northwest to north winds near 10 knots. Seas
subsiding to 1 to 2 feet. Isolated showers.
.THURSDAY...North to northeast winds 5 to 10 knots. Seas around
1 foot. Isolated showers.
.THURSDAY NIGHT...Northeast winds 5 to 10 knots, increasing to
10 to 15 knots after midnight. Seas around 1 foot. Isolated
showers.

$$

MJV/AP