National Weather Service Marine Forecast FZUS52 KKEY
FZUS52 KKEY 161527
CWFKEY
Coastal Waters Forecast for the Florida Keys
National Weather Service Key West FL
1027 AM EST Fri Jan 16 2026
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.
GMZ005-170330
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
1027 AM EST Fri Jan 16 2026
SYNOPSIS
High pressure centered near the Florida First Coast
will quickly slide eastward. This will support rapidly slackening
breezes through Saturday, with breezes continuing to clock to the
northeast to east. The next cold front is progged to push through
the Florida Keys coastal waters on Sunday or Sunday night, with
fresh to strong northerly breezes in its wake for early next week.
The Approximate Shoreward Edge of the Gulf Stream as of January 12...
19 NM South of Dry Tortugas Light...on Loggerhead Key. 13 NM South of Cosgrove Shoal Light...off the Marquesas Keys. 15 NM South of Sand Key Light...off Key West. 17 NM South of Looe Key...off Big Pine Key. 17 NM Southeast of Sombrero Key Light...off Marathon. 15 NM Southeast of Alligator Reef Light...off Islamorada. 10 NM Southeast of Molasses Reef Light...off Key Largo. 5 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.
GMZ031-170330
Florida Bay including Barnes Sound, Blackwater Sound, and
Buttonwood Sound
1027 AM EST Fri Jan 16 2026
THIS AFTERNOON
North to northeast winds 10 to 15 knots,
becoming northeast 5 to 10 knots. Bay waters a light to moderate
chop, becoming smooth to a light chop.
TONIGHT
Northeast to east winds near 10 knots, briefly
increasing to 10 to 15 knots. Bay waters a light chop, becoming a
light to moderate chop. Isolated showers after midnight.
SATURDAY
Northeast to east winds near 10 knots, becoming
northeast near 5 knots. Bay waters a light chop, becoming smooth.
Isolated showers.
SATURDAY NIGHT
Northeast winds 5 to 10 knots, becoming north to
northeast. Bay waters smooth to a light chop. Isolated showers.
SUNDAY
North winds near 10 knots, becoming northwest 15 to 20
knots in the afternoon. Bay waters a light chop, becoming choppy.
Isolated showers.
SUNDAY NIGHT
Northwest to north winds 15 to 20 knots, becoming
north. Bay waters choppy. Isolated showers.
MONDAY
North winds 15 to 20 knots, becoming north to northeast
near 15 knots. Bay waters choppy, becoming a moderate chop.
MONDAY NIGHT
North to northeast winds 15 to 20 knots. Bay
waters choppy.
TUESDAY
North to northeast winds near 20 knots, becoming
northeast. Bay waters rough.
TUESDAY NIGHT
Northeast winds near 20 knots. Bay waters
rough.
GMZ032-035-170330
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
1027 AM EST Fri Jan 16 2026
THIS AFTERNOON
North to northeast winds 10 to 15 knots,
becoming northeast near 10 knots. Seas 2 to 3 feet, except
3 to 5 feet, occasionally to 6 feet west of the Marquesas Keys.
Nearshore waters a light to moderate chop, becoming a light chop.
TONIGHT
Northeast to east winds 10 to 15 knots, decreasing to
near 10 knots. Seas 2 to 3 feet, except 3 to 4 feet, occasionally
to 5 feet west of the Marquesas Keys. Nearshore waters a light to
moderate chop, becoming a light chop. Isolated showers after
midnight.
SATURDAY
Northeast winds near 10 knots, becoming north to
northeast 5 to 10 knots. Seas 1 to 2 feet, except 2 to 3 feet
west of the Marquesas Keys. Nearshore waters a light chop,
becoming smooth to a light chop. Isolated showers.
SATURDAY NIGHT
North to northeast winds near 10 knots. Seas 1
to 2 feet. Nearshore waters a light chop. Isolated showers.
SUNDAY
North winds 10 to 15 knots, becoming northwest to north
near 20 knots in the afternoon. Seas 1 to 2 feet, building to 2
to 3 feet. Nearshore waters a light to moderate chop, becoming
rough. Isolated showers.
SUNDAY NIGHT
North winds 20 to 25 knots, decreasing to near 20
knots. Seas 3 to 5 feet, occasionally to 6 feet. West of the
Marquesas Keys, seas 4 to 5 feet, occasionally to 6 feet, building
to 5 to 7 feet, occasionally to 9 feet. Nearshore waters very
rough, becoming rough. Isolated showers.
MONDAY
North winds near 20 knots, becoming north to northeast
near 15 knots. Seas 3 to 5 feet, occasionally to 6 feet, except 5
to 7 feet, occasionally to 9 feet west of the Marquesas Keys.
Nearshore waters rough, becoming a moderate chop.
MONDAY NIGHT
North to northeast winds near 15 knots,
increasing to near 20 knots. Seas 2 to 4 feet, occasionally to 5
feet, except 4 to 5 feet, occasionally to 6 feet west of the
Marquesas Keys. Nearshore waters a moderate chop, becoming rough.
TUESDAY
North to northeast winds near 20 knots. Seas 2 to
4 feet, occasionally to 5 feet, except 4 to 6 feet, occasionally
to 8 feet west of the Marquesas Keys. Nearshore waters rough.
TUESDAY NIGHT
Northeast winds near 20 knots. Seas 2 to 4 feet,
occasionally to 5 feet, except 5 to 6 feet, occasionally to 8
feet west of the Marquesas Keys. Nearshore waters rough.
GMZ042>044-170330
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
1027 AM EST Fri Jan 16 2026
THIS AFTERNOON
North to northeast winds 10 to 15 knots,
becoming northeast to east near 10 knots. Seas 2 to 3 feet, except
3 to 5 feet, occasionally to 6 feet west of Cosgrove Shoal Light.
Nearshore waters a light to moderate chop, becoming a light chop.
TONIGHT
Northeast to east winds 10 to 15 knots, decreasing to
near 10 knots. Seas 2 to 3 feet, except 3 to 4 feet, occasionally
to 5 feet west of Cosgrove Shoal Light. Nearshore waters a light
to moderate chop, becoming a light chop. Isolated showers after
midnight.
SATURDAY
Northeast winds 5 to 10 knots. Seas 1 to 2 feet,
except 2 to 3 feet west of Cosgrove Shoal Light. Nearshore waters
smooth to a light chop. Isolated showers.
SATURDAY NIGHT
Northeast winds 5 to 10 knots, becoming north to
northeast near 10 knots. Seas 1 to 2 feet. Nearshore waters
smooth to a light chop, becoming a light chop. Isolated showers.
SUNDAY
North winds 10 to 15 knots, becoming northwest to north
near 20 knots. Seas 2 to 3 feet, except building to around 3 feet
west of Cosgrove Shoal Light. Nearshore waters a light to
moderate chop, becoming rough. Isolated showers.
SUNDAY NIGHT
North winds 20 to 25 knots, decreasing to near 20
knots. Seas 2 to 3 feet, except 4 to 6 feet, occasionally to 8
feet west of Cosgrove Shoal Light. Nearshore waters very rough,
becoming rough. Isolated showers.
MONDAY
North winds near 20 knots, becoming north to northeast
near 15 knots. Seas 2 to 3 feet, except 5 to 6 feet, occasionally
to 8 feet west of Cosgrove Shoal Light. Nearshore waters rough,
becoming a moderate chop.
MONDAY NIGHT
North to northeast winds 15 to 20 knots,
increasing to near 20 knots. Seas 2 to 3 feet, except 4 to 5
feet, occasionally to 6 feet west of Cosgrove Shoal Light.
Nearshore waters choppy, becoming rough.
TUESDAY
North to northeast winds near 20 knots. Seas 2 to
3 feet, except 4 to 5 feet, occasionally to 6 feet west of
Cosgrove Shoal Light. Nearshore waters rough.
TUESDAY NIGHT
Northeast winds 20 to 25 knots. Seas 2 to
4 feet, occasionally to 5 feet, except 4 to 5 feet, occasionally
to 6 feet west of Cosgrove Shoal Light. Nearshore waters very
rough.
GMZ052>055-072>075-170330
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
1027 AM EST Fri Jan 16 2026
SMALL CRAFT SHOULD EXERCISE CAUTION UNTIL SEAS SUBSIDE
THIS AFTERNOON
North to northeast winds near 15 knots,
becoming northeast to east 10 to 15 knots. Seas 4 to 6 feet,
occasionally to 7 feet, subsiding to 3 to 5 feet, occasionally to
6 feet. Wave Detail: North to northeast 6 feet at 7 seconds and
west to northwest 6 feet at 9 seconds.
TONIGHT
East winds 10 to 15 knots, decreasing to near 10 knots.
Seas 3 to 5 feet, occasionally to 6 feet, subsiding to 3 to 4
feet, occasionally to 5 feet. Wave Detail: Northeast to east 4
feet at 7 seconds and west to northwest 3 feet at 9 seconds.
Isolated showers.
SATURDAY
Northeast to east winds 5 to 10 knots. Seas subsiding
to 2 to 3 feet. Wave Detail: East 3 feet at 6 seconds and west to
northwest 2 feet at 8 seconds. Isolated showers.
SATURDAY NIGHT
Northeast winds near 10 knots. Seas 2 to
3 feet. Scattered showers.
SUNDAY
North winds 10 to 15 knots, becoming northwest to north
near 20 knots. Seas 2 to 3 feet, building to 3 to 4 feet,
occasionally to 5 feet. Scattered showers.
SUNDAY NIGHT
Northwest to north winds 20 to 25 knots, becoming
north. Seas 3 to 5 feet, occasionally to 6 feet, building to 5 to
7 feet, occasionally to 9 feet. Isolated showers.
MONDAY
North winds near 20 knots, becoming north to northeast 15
to 20 knots. Seas 5 to 7 feet, occasionally to 9 feet. Isolated
showers.
MONDAY NIGHT
North to northeast winds 15 to 20 knots,
increasing to near 20 knots. Seas 4 to 6 feet, occasionally to 8
feet, building to 5 to 7 feet, occasionally to 9 feet.
TUESDAY
Northeast winds 20 to 25 knots. Seas 5 to 8 feet,
occasionally to 10 feet. Isolated showers.
TUESDAY NIGHT
Northeast winds 20 to 25 knots. Seas 6 to
9 feet, occasionally to 10 feet. Isolated showers.
GMZ033-034-170330
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
1027 AM EST Fri Jan 16 2026
SMALL CRAFT SHOULD EXERCISE CAUTION UNTIL SEAS SUBSIDE
THIS AFTERNOON
North to northeast winds 10 to 15 knots,
becoming northeast to east near 10 knots. Seas 4 to 6 feet,
occasionally to 7 feet, subsiding to 3 to 5 feet, occasionally to
6 feet. Wave Detail: Northwest 7 feet at 9 seconds and northeast
3 feet at 5 seconds.
TONIGHT
Northeast to east winds near 10 knots, increasing to
10 to 15 knots. Seas 3 to 5 feet, occasionally to 6 feet. Wave
Detail: West to northwest 4 feet at 8 seconds and northeast to
east 2 feet at 4 seconds. Isolated showers after midnight.
SATURDAY
Northeast winds 10 to 15 knots, decreasing to near 10
knots. Seas 3 to 4 feet, occasionally to 5 feet, subsiding to 2
to 3 feet. Wave Detail: West 3 feet at 7 seconds and northeast 2
feet at 4 seconds.
SATURDAY NIGHT
North to northeast winds near 10 knots. Seas
around 2 feet. Isolated showers.
SUNDAY
North winds 10 to 15 knots, becoming northwest to north
near 20 knots. Seas around 2 feet, building 3 to 4 feet,
occasionally to 6 feet. Isolated showers.
SUNDAY NIGHT
North winds 20 to 25 knots, decreasing to near 20
knots. Seas 5 to 7 feet, occasionally to 9 feet. Isolated
showers.
MONDAY
North winds near 20 knots, becoming north to northeast 15
to 20 knots. Seas 4 to 6 feet, occasionally to 8 feet.
MONDAY NIGHT
North to northeast winds 15 to 20 knots,
increasing to near 20 knots. Seas 4 to 5 feet, occasionally to 6
feet.
TUESDAY
North to northeast winds near 20 knots. Seas 4 to
6 feet, occasionally to 8 feet.
TUESDAY NIGHT
Northeast winds 20 to 25 knots. Seas 4 to
6 feet, occasionally to 8 feet.
BT/MJV
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