FZUS52 KKEY 100918
CWFKEY

Coastal Waters Forecast for the Florida Keys
National Weather Service Key West FL
418 AM EST Fri Jan 10 2025

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.

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.

GMZ005-101600
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas 418 AM EST Fri Jan 10 2025

SYNOPSIS
High pressure centered near the Carolina coast will continue to shift east in response to a developing low pressure system across the northern Gulf of Mexico. This will allow for winds to clock around from northerlies this morning towards the east and southeast by this afternoon. Further veering will occur through Saturday as the low pressure system treks eastward and a cold front approaches from the northwest. Frontal passage is expected late Saturday afternoon or early evening with northerly breezes returning. Another cold front looks to arrive Tuesday with a more noticeable northerly surge in its wake.

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

51 NM South of Dry Tortugas Light...on Loggerhead Key. 17 NM South of Cosgrove Shoal Light...off the Marquesas Keys. 9 NM South of Sand Key Light...off Key West. 24 NM South of Looe Key...off Big Pine Key. 35 NM South of Sombrero Key Light...off Marathon. 23 NM Southeast of Alligator Reef Light...off Islamorada. 23 NM Southeast of Molasses Reef Light...off Key Largo. 17 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.

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GMZ031-101600
Florida Bay including Barnes Sound, Blackwater Sound, and Buttonwood Sound
418 AM EST Fri Jan 10 2025

TODAY
North to northeast winds near 10 knots, becoming east to southeast in the afternoon. Bay waters a light chop.

TONIGHT
Southeast winds near 10 knots, becoming south to southwest after midnight. Bay waters a light chop.

SATURDAY
South to southwest winds near 10 knots, becoming southwest to west late. Bay waters a light chop. Isolated showers.

SATURDAY NIGHT
Northwest to north winds near 10 knots, becoming north to northeast. Bay waters a light chop. Isolated showers.

SUNDAY
North to northeast winds near 10 knots. Bay waters a light chop. Isolated showers.

SUNDAY NIGHT
Northeast to east winds near 10 knots. Bay waters a light chop. Isolated showers.

MONDAY
East to southeast winds 5 to 10 knots. Bay waters smooth to a light chop. Isolated showers.

MONDAY NIGHT
Northeast to east winds near 10 knots. Bay waters a light chop. Isolated showers.

TUESDAY
North to northeast winds 10 to 15 knots. Bay waters a light to moderate chop. Isolated showers.

TUESDAY NIGHT
North to northeast winds increasing to 15 to 20 knots. Bay waters becoming choppy. Isolated showers.

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GMZ032-035-101600
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
418 AM EST Fri Jan 10 2025

TODAY
Northeast to east winds near 10 knots, becoming east to southeast in the afternoon. Seas 1 to 2 feet, except 2 to 3 feet west of the Marquesas Keys. Nearshore waters a light chop.

TONIGHT
Southeast winds 10 to 15 knots, becoming south to southwest. Seas 1 to 2 feet, except 2 to 3 feet west of the Marquesas Key. Nearshore waters a light to moderate chop.

SATURDAY
South to southwest winds 10 to 15 knots, becoming west in the afternoon. Seas 1 to 2 feet. Nearshore waters a light to moderate chop. Isolated showers.

SATURDAY NIGHT
Northwest to north winds 10 to 15 knots, becoming north to northeast near 10 knots. Seas 1 to 2 feet, building to 1 to 3 feet, except building to 3 to 4 feet west of the Marquesas Keys due to a northwest swell. Nearshore waters a light to moderate chop, becoming a light chop. Isolated showers.

SUNDAY
Northeast winds near 10 knots. Seas 1 to 3 feet, except 3 to 4 feet west of the Marquesas Keys due to a northwest swell. Nearshore waters a light chop. Isolated showers.

SUNDAY NIGHT
Northeast to east 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.

MONDAY
East to southeast winds near 10 knots, decreasing to 5 to 10 knots. Seas 1 to 2 feet. Nearshore waters a light chop, becoming smooth to a light chop. Isolated showers.

MONDAY NIGHT
Northeast to east winds 5 to 10 knots, becoming northeast 10 to 15 knots after midnight. Seas around 1 foot, except 1 to 2 feet west of the Marquesas Keys. Nearshore waters smooth to a light chop, becoming a light to moderate chop. Isolated showers.

TUESDAY
North to northeast winds 10 to 15 knots, increasing to 15 to 20 knots. Seas 1 to 2 feet, building to 2 to 4 feet, occasionally to 5 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 to moderate chop, becoming choppy. Isolated showers.

TUESDAY NIGHT
North to northeast winds 15 to 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 choppy. Isolated showers.

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GMZ042>044-101600
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
418 AM EST Fri Jan 10 2025

TODAY
Northeast to east winds 10 to 15 knots, becoming southeast in the afternoon. Seas 1 to 2 feet, except 2 to 3 feet west of Cosgrove Shoal Light. Nearshore waters a light to moderate chop.

TONIGHT
Southeast to south winds 10 to 15 knots, becoming south to southwest. Seas 2 to 3 feet. Nearshore waters a light to moderate chop.

SATURDAY
South to southwest winds 10 to 15 knots, becoming southwest to west in the afternoon. Seas 2 to 3 feet. Nearshore waters a light to moderate chop. Isolated showers.

SATURDAY NIGHT
Northwest to north winds 10 to 15 knots, becoming north to northeast 5 to 10 knots. Seas around 2 feet, subsiding to 1 to 2 feet. West of Cosgrove Shoal Light, seas building to 3 to 4 feet due to a northwest swell. Nearshore waters a light to moderate chop, becoming smooth to a light chop. Isolated showers.

SUNDAY
Northeast winds near 10 knots. Seas 1 to 2 feet, except 3 to 4 feet west of Cosgrove Shoal Light due to a northwest swell. Nearshore waters a light chop. Isolated showers.

SUNDAY NIGHT
East 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.

MONDAY
East to southeast winds near 10 knots, decreasing to 5 to 10 knots. Seas 1 to 2 feet. Nearshore waters a light chop, becoming smooth to a light chop. Isolated showers.

MONDAY NIGHT
Northeast to east 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. Isolated showers.

TUESDAY
North to northeast winds 10 to 15 knots, increasing to 15 to 20 knots. Seas 1 to 2 feet. West of Cosgrove Shoal Light, seas 2 to 3 feet, building to 3 to 5 feet, occasionally to 6 feet. Nearshore waters a light to moderate chop, becoming choppy. Isolated showers.

TUESDAY NIGHT
North to northeast winds 15 to 20 knots. Seas 2 to 3 feet, except 4 to 5 feet, occasionally to 6 feet west of Cosgrove Shoal Light. Nearshore waters choppy. Isolated showers.

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GMZ052>055-072>075-101600
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
418 AM EST Fri Jan 10 2025

TODAY
East winds 10 to 15 knots, becoming east to southeast in the afternoon. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: East 4 feet at 6 seconds and west to northwest 2 feet at 6 seconds.

TONIGHT
Southeast to south winds 10 to 15 knots, becoming south to southwest. Seas 2 to 4 feet, subsiding to 2 to 3 feet. Wave Detail: Southeast 3 feet at 5 seconds and west to northwest 1 foot at 6 seconds.

SATURDAY
Southwest winds 10 to 15 knots, becoming southwest to west. Seas 2 to 3 feet. Wave Detail: South to southwest 3 feet at 5 seconds and northwest 1 foot at 5 seconds. Isolated showers.

SATURDAY NIGHT
Northwest to north winds 10 to 15 knots, becoming north to northeast 5 to 10 knots. Seas around 2 feet, subsiding to 1 to 2 feet. West of Halfmoon Shoal Light, seas building to 2 to 4 feet, occasionally to 5 feet due to a northwest swell. Isolated showers.

SUNDAY
Northeast winds increasing to near 10 knots. Seas 2 to 4 feet, occasionally to 5 feet due to a west to northwest swell. Isolated showers.

SUNDAY NIGHT
Northeast to east winds near 15 knots, becoming east to southeast 10 to 15 knots. Seas 2 to 4 feet, occasionally to 5 feet. Isolated showers.

MONDAY
East to southeast winds decreasing to near 10 knots. Seas 2 to 3 feet. Isolated showers.

MONDAY NIGHT
Northeast to east winds 10 to 15 knots. Seas 2 to 3 feet. Isolated showers.

TUESDAY
Northeast winds increasing to 15 to 20 knots. Seas 2 to 3 feet, building to 3 to 5 feet, occasionally to 6 feet in the afternoon. Isolated showers.

TUESDAY NIGHT
Northeast winds near 20 knots. Seas building to 5 to 7 feet, occasionally to 9 feet. Isolated showers.

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GMZ033-034-101600
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
418 AM EST Fri Jan 10 2025

TODAY
East winds 10 to 15 knots, becoming east to southeast. Seas 2 to 3 feet. Wave Detail: East 2 feet at 4 seconds and northwest 2 feet at 6 seconds.

TONIGHT
Southeast to south winds 10 to 15 knots, becoming south to southwest. Seas 2 to 3 feet. Wave Detail: Southeast to south 2 feet at 4 seconds and northwest 1 foot at 6 seconds.

SATURDAY
South to southwest winds 10 to 15 knots, becoming northwest to north near 15 knots in the afternoon. Seas 2 to 3 feet. Wave Detail: South to southwest 2 feet at 4 seconds and west to northwest 2 feet at 4 seconds. Scattered showers.

SATURDAY NIGHT
North to northeast winds near 15 knots, decreasing to 10 to 15 knots. Seas 2 to 3 feet, building to 3 to 4 feet, occasionally to 5 feet due to a northwest swell. Isolated showers.

SUNDAY
Northeast winds 10 to 15 knots. Seas 3 to 4 feet, occasionally to 5 feet due to a west to northwest swell. Isolated showers.

SUNDAY NIGHT
Northeast to east winds 10 to 15 knots, becoming east. Seas 2 to 3 feet. Isolated showers.

MONDAY
East to southeast winds near 10 knots. Seas around 2 feet. Isolated showers.

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

TUESDAY
North to northeast winds 15 to 20 knots. Seas 3 to 4 feet, occasionally to 5 feet, building to 4 to 6 feet, occasionally to 8 feet in the afternoon. Isolated showers.

TUESDAY NIGHT
Northeast winds near 20 knots. Seas 4 to 6 feet, occasionally to 8 feet. Isolated showers.