FZUS52 KKEY 271531
CWFKEY
Coastal Waters Forecast for the Florida Keys
National Weather Service Key West FL
1031 AM EST Sat Dec 27 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.
GMZ005-280345-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
1031 AM EST Sat Dec 27 2025
.SYNOPSIS...Weak high pressure will meander in the eastern Gulf
over the next few days, resulting in light to gentle breezes.
Mainland nocturnal land breezes may drive brief bouts of gentle to
moderate northerlies in the morning. A healthy cold front is
expected to move through the Keys towards the middle part of next
week. This will lead to freshening northerly breezes throughout
all the Florida Keys coastal waters.
The Approximate Shoreward Edge of the Gulf Stream as of December
27...
18 NM South of Dry Tortugas Light...on Loggerhead Key.
11 NM South of Cosgrove Shoal Light...off the Marquesas Keys.
12 NM South of Sand Key Light...off Key West.
12 NM South of Looe Key...off Big Pine Key.
13 NM Southeast of Sombrero Key Light...off Marathon.
8 NM Southeast of Alligator Reef Light...off Islamorada.
2 NM Southeast of Molasses Reef Light...off Key Largo.
2 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 and RTOFS.
$$
GMZ031-280345-
Florida Bay including Barnes Sound, Blackwater Sound, and
Buttonwood Sound-
1031 AM EST Sat Dec 27 2025
.THIS AFTERNOON...Northwest to north winds near 10 knots,
becoming variable near 5 knots. Bay waters a light chop, becoming
smooth.
.TONIGHT...Variable winds near 5 knots. Bay waters smooth.
.SUNDAY...North to northeast winds near 5 knots, becoming east.
Bay waters smooth.
.SUNDAY NIGHT...Variable winds near 5 knots. Bay waters smooth.
.MONDAY...Variable winds near 5 knots. Bay waters smooth.
.MONDAY NIGHT...West to northwest winds near 5 knots, becoming
northwest and increasing to near 10 knots. Bay waters smooth,
becoming a light chop.
.TUESDAY...Northwest winds near 10 knots, increasing to 10 to 15
knots. Bay waters a light chop, becoming a light to moderate
chop. Isolated showers.
.TUESDAY NIGHT...Northwest winds near 15 knots, becoming north and
increasing to 15 to 20 knots. Bay waters a moderate chop,
becoming choppy.
.WEDNESDAY...North winds near 15 knots, decreasing to near 10 knots.
Bay waters a moderate chop, becoming a light chop.
.WEDNESDAY NIGHT...North winds 10 to 15 knots. Bay waters a light
to moderate chop.
$$
GMZ032-035-280345-
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-
1031 AM EST Sat Dec 27 2025
.THIS AFTERNOON...Northwest to north winds near 10 knots,
decreasing to 5 to 10 knots. Seas 1 to 2 feet, subsiding to 1 foot
or less. Nearshore waters a light chop, becoming smooth to a
light chop.
.TONIGHT...North winds 5 to 10 knots, becoming north to northeast.
Seas 1 foot or less. Nearshore waters smooth to a light chop.
.SUNDAY...Northeast winds 5 to 10 knots, becoming east. Seas 1
foot or less. Nearshore waters smooth to a light chop.
.SUNDAY NIGHT...East winds near 5 knots, becoming northeast to
east. Seas less than 1 foot. Nearshore waters smooth.
.MONDAY...Northeast winds near 5 knots, becoming variable. Seas
less than 1 foot. Nearshore waters smooth.
.MONDAY NIGHT...Northwest to north near 5 knots, increasing to 5
to 10 knots. Seas 1 foot or less. Nearshore waters smooth,
becoming smooth to a light chop.
.TUESDAY...Northwest to north winds near 10 knots, increasing to
near 15 knots. Seas 1 to 2 feet, building to 2 to 3 feet. West of
the Marquesas Keys, seas 2 to 3 feet, building to 3 to 5 feet,
occasionally to 6 feet. Nearshore waters a light chop, becoming a
moderate chop. Isolated showers.
.TUESDAY NIGHT...North winds 15 to 20 knots. Seas 3 to 5 feet,
occasionally to 6 feet, except 5 to 6 feet, occasionally to 8
feet west of the Marquesas Keys. Nearshore waters choppy.
.WEDNESDAY...North winds 15 to 20 knots, decreasing to 10 to 15
knots. Seas 3 to 5 feet, occasionally to 6 feet, subsiding to 2
to 3 feet. West of the Marquesas Keys, seas 5 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.
.WEDNESDAY NIGHT...North winds 10 to 15 knots. Seas 1 to 2 feet,
except around 3 feet west of the Marquesas Keys. Nearshore waters
a light to moderate chop.
$$
GMZ042>044-280345-
Hawk Channel from Ocean Reef to Craig Key out to the reef-
Hawk Channel from Craig Key to west end of Seven Mile Bridge out
to the reef-
Hawk Channel from west end of Seven Mile Bridge to Halfmoon Shoal
out to the reef-
1031 AM EST Sat Dec 27 2025
.THIS AFTERNOON...North to northeast winds near 10 knots,
decreasing to 5 to 10 knots. Seas 1 to 2 feet, subsiding to around
1 foot. Nearshore waters a light chop, becoming smooth to a light
chop.
.TONIGHT...North winds 5 to 10 knots, becoming north to northeast.
Seas around 1 foot. Nearshore waters smooth to a light chop.
.SUNDAY...Northeast to east winds 5 to 10 knots. Seas around 1
foot. Nearshore waters smooth to a light chop.
.SUNDAY NIGHT...Northeast to east winds 5 to 10 knots. Seas
around 1 foot. Nearshore waters smooth to a light chop.
.MONDAY...Northeast winds near 5 knots, becoming variable. Seas
1 foot or less. Nearshore waters smooth.
.MONDAY NIGHT...Northwest to north winds near 5 knots, increasing
to 5 to 10 knots. Seas 1 foot or less. Nearshore waters smooth,
becoming smooth to a light chop.
.TUESDAY...Northwest winds near 10 knots, becoming northwest to
north and increasing to near 15 knots. Seas 1 to 2 feet. West of
Cosgrove Shoal Light, seas 2 to 3 feet, building to 3 to 4 feet,
occasionally to 5 feet. Nearshore waters a light chop, becoming a
moderate chop. Isolated showers.
.TUESDAY NIGHT...North winds 15 to 20 knots. Seas 1 to 3 feet,
except 4 to 5 feet, occasionally to 6 feet west of Cosgrove Shoal
Light. Nearshore waters choppy. Isolated showers.
.WEDNESDAY...North winds 15 to 20 knots, decreasing to 10 to 15
knots. Seas 2 to 3 feet, except 3 to 5 feet, occasionally to 6
feet west of Cosgrove Shoal Light. Nearshore waters choppy,
becoming a light to moderate chop.
.WEDNESDAY NIGHT...North winds 10 to 15 knots. Seas 1 to 2 feet,
except 3 to 4 feet, occasionally to 5 feet west of Cosgrove Shoal
Light. Nearshore waters a light to moderate chop.
$$
GMZ052>055-072>075-280345-
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-
1031 AM EST Sat Dec 27 2025
.THIS AFTERNOON...Northeast winds 10 to 15 knots, decreasing to 5
to 10 knots. Seas 1 to 3 feet, subsiding to 1 to 2 feet. Wave
Detail:
Northeast 1 foot at 4 seconds.
.TONIGHT...Northeast winds 5 to 10 knots. Seas 1 to 2 feet. Wave
Detail: Northeast 1 foot at 4 seconds.
.SUNDAY...Northeast to east winds 5 to 10 knots. Seas 1 to
2 feet. Wave Detail: Northeast to east 2 feet at 4 seconds.
.SUNDAY NIGHT...East winds 5 to 10 knots. Seas 1 to 2 feet.
.MONDAY...East winds near 5 knots, becoming variable. Seas 1 to 2
feet.
.MONDAY NIGHT...North winds near 5 knots, becoming northwest to
north and increasing to 5 to 10 knots. Seas 1 to 2 feet.
.TUESDAY...Northwest to north winds near 10 knots, increasing to
near 15 knots. Seas 2 to 3 feet, building to 2 to 4 feet,
occasionally to 5 feet. Isolated showers.
.TUESDAY NIGHT...North winds 15 to 20 knots. Seas 4 to 6 feet,
occasionally to 8 feet. Isolated showers.
.WEDNESDAY...North winds 15 to 20 knots, decreasing to 10 to 15
knots. Seas 4 to 6 feet, occasionally to 8 feet, subsiding to 3
to 4 feet, occasionally to 5 feet. Isolated showers.
.WEDNESDAY NIGHT...North winds 10 to 15 knots. Seas 2 to 4 feet,
occasionally to 5 feet. Isolated showers.
$$
GMZ033-034-280345-
Gulf of America from East Cape Sable to Chokoloskee 20 to 60 NM
out and beyond 5 fathoms-
Gulf of America including Dry Tortugas and Rebecca Shoal Channel-
1031 AM EST Sat Dec 27 2025
.THIS AFTERNOON...North to northeast winds 5 to 10 knots. Seas
around 1 foot.
.TONIGHT...North to northeast winds 5 to 10 knots. Seas around
1 foot. Wave Detail: North to northeast 1 foot at 2 seconds.
.SUNDAY...Northeast to east winds 5 to 10 knots. Seas around
1 foot. Wave Detail: Northeast 1 foot at 2 seconds.
.SUNDAY NIGHT...Northeast to east winds near 5 knots. Seas 1 foot
or less.
.MONDAY...Variable winds near 5 knots. Seas 1 foot or less.
.MONDAY NIGHT...Northwest to north winds near 5 knots, increasing
to near 10 knots. Seas 1 foot or less, building to 1 to 2 feet.
.TUESDAY...Northwest to north winds 10 to 15 knots, becoming
north and increasing to 15 to 20 knots. Seas 1 to 2 feet,
building to 3 to 5 feet, occasionally to 6 feet. Isolated showers.
.TUESDAY NIGHT...North winds near 20 knots. Seas 5 to 6 feet,
occasionally to 8 feet.
.WEDNESDAY...North to northeast winds 15 to 20 knots, becoming
north and decreasing to 10 to 15 knots. Seas 4 to 6 feet,
occasionally to 8 feet, subsiding to 3 to 4 feet, occasionally to
5 feet.
.WEDNESDAY NIGHT...North winds 10 to 15 knots. Seas 3 to 4 feet,
occasionally to 5 feet.
$$
CWFKEY
Coastal Waters Forecast for the Florida Keys
National Weather Service Key West FL
1031 AM EST Sat Dec 27 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.
GMZ005-280345-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
1031 AM EST Sat Dec 27 2025
.SYNOPSIS...Weak high pressure will meander in the eastern Gulf
over the next few days, resulting in light to gentle breezes.
Mainland nocturnal land breezes may drive brief bouts of gentle to
moderate northerlies in the morning. A healthy cold front is
expected to move through the Keys towards the middle part of next
week. This will lead to freshening northerly breezes throughout
all the Florida Keys coastal waters.
The Approximate Shoreward Edge of the Gulf Stream as of December
27...
18 NM South of Dry Tortugas Light...on Loggerhead Key.
11 NM South of Cosgrove Shoal Light...off the Marquesas Keys.
12 NM South of Sand Key Light...off Key West.
12 NM South of Looe Key...off Big Pine Key.
13 NM Southeast of Sombrero Key Light...off Marathon.
8 NM Southeast of Alligator Reef Light...off Islamorada.
2 NM Southeast of Molasses Reef Light...off Key Largo.
2 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 and RTOFS.
$$
GMZ031-280345-
Florida Bay including Barnes Sound, Blackwater Sound, and
Buttonwood Sound-
1031 AM EST Sat Dec 27 2025
.THIS AFTERNOON...Northwest to north winds near 10 knots,
becoming variable near 5 knots. Bay waters a light chop, becoming
smooth.
.TONIGHT...Variable winds near 5 knots. Bay waters smooth.
.SUNDAY...North to northeast winds near 5 knots, becoming east.
Bay waters smooth.
.SUNDAY NIGHT...Variable winds near 5 knots. Bay waters smooth.
.MONDAY...Variable winds near 5 knots. Bay waters smooth.
.MONDAY NIGHT...West to northwest winds near 5 knots, becoming
northwest and increasing to near 10 knots. Bay waters smooth,
becoming a light chop.
.TUESDAY...Northwest winds near 10 knots, increasing to 10 to 15
knots. Bay waters a light chop, becoming a light to moderate
chop. Isolated showers.
.TUESDAY NIGHT...Northwest winds near 15 knots, becoming north and
increasing to 15 to 20 knots. Bay waters a moderate chop,
becoming choppy.
.WEDNESDAY...North winds near 15 knots, decreasing to near 10 knots.
Bay waters a moderate chop, becoming a light chop.
.WEDNESDAY NIGHT...North winds 10 to 15 knots. Bay waters a light
to moderate chop.
$$
GMZ032-035-280345-
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-
1031 AM EST Sat Dec 27 2025
.THIS AFTERNOON...Northwest to north winds near 10 knots,
decreasing to 5 to 10 knots. Seas 1 to 2 feet, subsiding to 1 foot
or less. Nearshore waters a light chop, becoming smooth to a
light chop.
.TONIGHT...North winds 5 to 10 knots, becoming north to northeast.
Seas 1 foot or less. Nearshore waters smooth to a light chop.
.SUNDAY...Northeast winds 5 to 10 knots, becoming east. Seas 1
foot or less. Nearshore waters smooth to a light chop.
.SUNDAY NIGHT...East winds near 5 knots, becoming northeast to
east. Seas less than 1 foot. Nearshore waters smooth.
.MONDAY...Northeast winds near 5 knots, becoming variable. Seas
less than 1 foot. Nearshore waters smooth.
.MONDAY NIGHT...Northwest to north near 5 knots, increasing to 5
to 10 knots. Seas 1 foot or less. Nearshore waters smooth,
becoming smooth to a light chop.
.TUESDAY...Northwest to north winds near 10 knots, increasing to
near 15 knots. Seas 1 to 2 feet, building to 2 to 3 feet. West of
the Marquesas Keys, seas 2 to 3 feet, building to 3 to 5 feet,
occasionally to 6 feet. Nearshore waters a light chop, becoming a
moderate chop. Isolated showers.
.TUESDAY NIGHT...North winds 15 to 20 knots. Seas 3 to 5 feet,
occasionally to 6 feet, except 5 to 6 feet, occasionally to 8
feet west of the Marquesas Keys. Nearshore waters choppy.
.WEDNESDAY...North winds 15 to 20 knots, decreasing to 10 to 15
knots. Seas 3 to 5 feet, occasionally to 6 feet, subsiding to 2
to 3 feet. West of the Marquesas Keys, seas 5 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.
.WEDNESDAY NIGHT...North winds 10 to 15 knots. Seas 1 to 2 feet,
except around 3 feet west of the Marquesas Keys. Nearshore waters
a light to moderate chop.
$$
GMZ042>044-280345-
Hawk Channel from Ocean Reef to Craig Key out to the reef-
Hawk Channel from Craig Key to west end of Seven Mile Bridge out
to the reef-
Hawk Channel from west end of Seven Mile Bridge to Halfmoon Shoal
out to the reef-
1031 AM EST Sat Dec 27 2025
.THIS AFTERNOON...North to northeast winds near 10 knots,
decreasing to 5 to 10 knots. Seas 1 to 2 feet, subsiding to around
1 foot. Nearshore waters a light chop, becoming smooth to a light
chop.
.TONIGHT...North winds 5 to 10 knots, becoming north to northeast.
Seas around 1 foot. Nearshore waters smooth to a light chop.
.SUNDAY...Northeast to east winds 5 to 10 knots. Seas around 1
foot. Nearshore waters smooth to a light chop.
.SUNDAY NIGHT...Northeast to east winds 5 to 10 knots. Seas
around 1 foot. Nearshore waters smooth to a light chop.
.MONDAY...Northeast winds near 5 knots, becoming variable. Seas
1 foot or less. Nearshore waters smooth.
.MONDAY NIGHT...Northwest to north winds near 5 knots, increasing
to 5 to 10 knots. Seas 1 foot or less. Nearshore waters smooth,
becoming smooth to a light chop.
.TUESDAY...Northwest winds near 10 knots, becoming northwest to
north and increasing to near 15 knots. Seas 1 to 2 feet. West of
Cosgrove Shoal Light, seas 2 to 3 feet, building to 3 to 4 feet,
occasionally to 5 feet. Nearshore waters a light chop, becoming a
moderate chop. Isolated showers.
.TUESDAY NIGHT...North winds 15 to 20 knots. Seas 1 to 3 feet,
except 4 to 5 feet, occasionally to 6 feet west of Cosgrove Shoal
Light. Nearshore waters choppy. Isolated showers.
.WEDNESDAY...North winds 15 to 20 knots, decreasing to 10 to 15
knots. Seas 2 to 3 feet, except 3 to 5 feet, occasionally to 6
feet west of Cosgrove Shoal Light. Nearshore waters choppy,
becoming a light to moderate chop.
.WEDNESDAY NIGHT...North winds 10 to 15 knots. Seas 1 to 2 feet,
except 3 to 4 feet, occasionally to 5 feet west of Cosgrove Shoal
Light. Nearshore waters a light to moderate chop.
$$
GMZ052>055-072>075-280345-
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-
1031 AM EST Sat Dec 27 2025
.THIS AFTERNOON...Northeast winds 10 to 15 knots, decreasing to 5
to 10 knots. Seas 1 to 3 feet, subsiding to 1 to 2 feet. Wave
Detail:
Northeast 1 foot at 4 seconds.
.TONIGHT...Northeast winds 5 to 10 knots. Seas 1 to 2 feet. Wave
Detail: Northeast 1 foot at 4 seconds.
.SUNDAY...Northeast to east winds 5 to 10 knots. Seas 1 to
2 feet. Wave Detail: Northeast to east 2 feet at 4 seconds.
.SUNDAY NIGHT...East winds 5 to 10 knots. Seas 1 to 2 feet.
.MONDAY...East winds near 5 knots, becoming variable. Seas 1 to 2
feet.
.MONDAY NIGHT...North winds near 5 knots, becoming northwest to
north and increasing to 5 to 10 knots. Seas 1 to 2 feet.
.TUESDAY...Northwest to north winds near 10 knots, increasing to
near 15 knots. Seas 2 to 3 feet, building to 2 to 4 feet,
occasionally to 5 feet. Isolated showers.
.TUESDAY NIGHT...North winds 15 to 20 knots. Seas 4 to 6 feet,
occasionally to 8 feet. Isolated showers.
.WEDNESDAY...North winds 15 to 20 knots, decreasing to 10 to 15
knots. Seas 4 to 6 feet, occasionally to 8 feet, subsiding to 3
to 4 feet, occasionally to 5 feet. Isolated showers.
.WEDNESDAY NIGHT...North winds 10 to 15 knots. Seas 2 to 4 feet,
occasionally to 5 feet. Isolated showers.
$$
GMZ033-034-280345-
Gulf of America from East Cape Sable to Chokoloskee 20 to 60 NM
out and beyond 5 fathoms-
Gulf of America including Dry Tortugas and Rebecca Shoal Channel-
1031 AM EST Sat Dec 27 2025
.THIS AFTERNOON...North to northeast winds 5 to 10 knots. Seas
around 1 foot.
.TONIGHT...North to northeast winds 5 to 10 knots. Seas around
1 foot. Wave Detail: North to northeast 1 foot at 2 seconds.
.SUNDAY...Northeast to east winds 5 to 10 knots. Seas around
1 foot. Wave Detail: Northeast 1 foot at 2 seconds.
.SUNDAY NIGHT...Northeast to east winds near 5 knots. Seas 1 foot
or less.
.MONDAY...Variable winds near 5 knots. Seas 1 foot or less.
.MONDAY NIGHT...Northwest to north winds near 5 knots, increasing
to near 10 knots. Seas 1 foot or less, building to 1 to 2 feet.
.TUESDAY...Northwest to north winds 10 to 15 knots, becoming
north and increasing to 15 to 20 knots. Seas 1 to 2 feet,
building to 3 to 5 feet, occasionally to 6 feet. Isolated showers.
.TUESDAY NIGHT...North winds near 20 knots. Seas 5 to 6 feet,
occasionally to 8 feet.
.WEDNESDAY...North to northeast winds 15 to 20 knots, becoming
north and decreasing to 10 to 15 knots. Seas 4 to 6 feet,
occasionally to 8 feet, subsiding to 3 to 4 feet, occasionally to
5 feet.
.WEDNESDAY NIGHT...North winds 10 to 15 knots. Seas 3 to 4 feet,
occasionally to 5 feet.
$$