National Weather Service Marine Forecast FZUS52 KKEY

FZUS52 KKEY 162120
CWFKEY

Coastal Waters Forecast for the Florida Keys
National Weather Service Key West FL
420 PM EST Sun Feb 16 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.

GMZ005-170330
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas 420 PM EST Sun Feb 16 2025

SYNOPSIS

A cold front will push through the Keys coastal waters late tonight into Monday morning, then stall just to the south of the Island Chain. Northwest to north breezes will clock around to the northeast, then east to southeast through Tuesday. A second cold front will push through the Keys marine zones on Thursday, with moderate to fresh breezes expected in its wake, lasting through the end of the work week.

The Approximate Shoreward Edge of the Gulf Stream as of February 12...

11 NM South of Dry Tortugas Light...on Loggerhead Key. 6 NM South of Cosgrove Shoal Light...off the Marquesas Keys. 4 NM South of Sand Key Light...off Key West. 9 NM South of Looe Key...off Big Pine Key. 9 NM South of Sombrero Key Light...off Marathon. 11 NM Southeast of Alligator Reef Light...off Islamorada. 10 NM Southeast of Molasses Reef Light...off Key Largo. 7 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.

---

GMZ031-170330
Florida Bay including Barnes Sound, Blackwater Sound, and Buttonwood Sound
420 PM EST Sun Feb 16 2025

TONIGHT
Southwest to west 5 to 10 knots, becoming northwest to north. Bay waters smooth to a light chop. Isolated showers.

MONDAY
North to northeast winds 5 to 10 knots, becoming northeast to east near 10 knots. Bay waters smooth to a light chop, becoming a light chop. Isolated showers.

MONDAY NIGHT
Northeast to east winds 10 to 15 knots, becoming east near 10 knots. Bay waters a light to moderate chop, becoming a light chop. Isolated showers.

TUESDAY
East to southeast winds near 10 knots. Bay waters a light chop. Isolated showers.

TUESDAY 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. Isolated showers.

WEDNESDAY
Southeast winds near 15 knots, becoming south to southwest near 10 knots. Bay waters a moderate chop, becoming a light chop.

WEDNESDAY NIGHT
Southwest to west winds 5 to 10 knots, becoming northwest near 10 knots. Bay waters smooth to a light chop, becoming a light chop. Isolated showers.

THURSDAY
Northwest to north winds near 10 knots. Bay waters a light chop. Isolated showers.

THURSDAY NIGHT
Northeast winds 10 to 15 knots, increasing to 15 to 20 knots. Bay waters a light to moderate chop, becoming choppy. Isolated showers.

FRIDAY AND FRIDAY NIGHT
Northeast to east winds 15 to 20 knots. Bay waters choppy. Isolated showers.

---

GMZ032-035-170330
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
420 PM EST Sun Feb 16 2025

TONIGHT
Southwest to west 5 to 10 knots, becoming northwest to north. Seas around 1 foot. Nearshore waters smooth to a light chop. Isolated showers.

MONDAY
North to northeast winds 5 to 10 knots, becoming northeast to east. Seas 1 to 2 feet. Nearshore waters smooth to a light chop. Isolated showers.

MONDAY NIGHT
Northeast to east winds near 10 knots. Seas 1 to 2 feet, except 2 to 3 feet west of the Marquesas Keys. Nearshore waters a light chop. Isolated showers.

TUESDAY
East to southeast winds near 10 knots. Seas 1 to 2 feet. Nearshore waters a light chop. Isolated showers.

TUESDAY NIGHT
East to southeast winds 10 to 15 knots, increasing to near 15 knots. Seas 1 to 2 feet. Nearshore waters a light to moderate chop, becoming a moderate chop. Isolated showers.

WEDNESDAY
Southeast winds near 15 knots, becoming south to southwest near 10 knots. Seas 1 to 2 feet. Nearshore waters a moderate chop, becoming a light chop.

WEDNESDAY NIGHT
Southwest to west winds 5 to 10 knots, becoming northwest near 10 knots. Seas around 1 foot. Nearshore waters smooth to a light chop, becoming a light chop. Isolated showers.

THURSDAY
Northwest to north winds near 10 knots, 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. Isolated showers.

THURSDAY NIGHT
North to northeast winds 15 to 20 knots. Seas building to 2 to 3 feet, except building to 3 to 4 feet, occasionally to 5 feet west of the Marquesas Keys. Nearshore waters choppy. Isolated showers.

FRIDAY AND FRIDAY NIGHT
Northeast to east 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>044-170330
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
420 PM EST Sun Feb 16 2025

TONIGHT
Southwest to west 5 to 10 knots, becoming northwest to north. Seas 2 to 3 feet, subsiding to 1 to 2 feet. Nearshore waters smooth to a light chop. Isolated showers.

MONDAY
North to northeast winds 5 to 10 knots, becoming northeast to east near 10 knots. Seas 1 to 2 feet. Nearshore waters smooth to a light chop, becoming a light chop. Isolated showers.

MONDAY NIGHT
Northeast to east winds near 10 knots. Seas 1 to 2 feet, except 2 to 3 feet west of Cosgrove Shoal Light. Nearshore waters a light chop. Isolated showers.

TUESDAY
East to southeast winds near 10 knots. Seas 1 to 2 feet, except 2 to 3 feet west of Cosgrove Shoal Light. Nearshore waters a light chop. Isolated showers.

TUESDAY NIGHT
East winds 10 to 15 knots, becoming east to southeast near 15 knots. Seas 2 to 3 feet. Nearshore waters a light to moderate chop, becoming a moderate chop. Isolated showers.

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

WEDNESDAY NIGHT
Southwest to west 5 to 10 knots, becoming west to northwest near 10 knots. Seas 1 to 2 feet. Nearshore waters smooth to a light chop, becoming a light chop. Isolated showers.

THURSDAY
Northwest to north winds 10 to 15 knots, becoming north to northeast near 15 knots. Seas 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. Isolated showers.

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

FRIDAY AND FRIDAY NIGHT
Northeast to east winds 15 to 20 knots. Seas 2 to 3 feet, except 3 to 4 feet, occasionally to 5 feet west of Cosgrove Shoal Light. Nearshore waters choppy. Isolated showers.

---

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
420 PM EST Sun Feb 16 2025

TONIGHT
South to southwest winds near 10 knots, becoming southwest to west 5 to 10 knots, then becoming northwest to north. Seas 2 to 4 feet, subsiding to around 2 feet. Wave Detail: East 2 feet at 6 seconds. Isolated showers.

MONDAY
North to northeast winds 5 to 10 knots, becoming north to northeast 10 to 15 knots. Seas 2 to 4 feet. Wave Detail: Northeast 3 foot at 4 seconds. Isolated showers.

MONDAY NIGHT
Northeast to east winds 10 to 15 knots, decreasing to near 10 knots. Seas 2 to 3 feet. Wave Detail: West to northwest 3 feet at 7 seconds and northeast 2 feet at 4 seconds. Isolated showers.

TUESDAY
East winds near 10 knots. Seas 2 to 3 feet. Isolated showers.

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

WEDNESDAY
Southeast near 15 knots, becoming south to southwest near 10 knots. Seas 2 to 3 feet.

WEDNESDAY NIGHT
Southwest to west near 10 knots, becoming northwest. Seas around 2 feet. Isolated showers.

THURSDAY
Northwest winds 10 to 15 knots, becoming north to northeast 15 to 20 knots. Seas 2 to 3 feet, building to 3 to 5 feet, occasionally to 6 feet. Isolated showers.

THURSDAY NIGHT
Northeast winds 15 to 20 knots. Seas 4 to 6 feet, occasionally to 8 feet. Isolated showers.

FRIDAY AND FRIDAY NIGHT
Northeast to east winds 15 to 20 knots. Seas 4 to 6 feet, occasionally to 8 feet. Isolated showers.

---

GMZ033-034-170330
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
420 PM EST Sun Feb 16 2025

TONIGHT
Southwest to west 5 to 10 knots, becoming north 10 to 15 knots late. Seas 1 to 3 feet. Wave Detail: Northwest 2 feet at 3 seconds and south to southwest 2 feet at 4 seconds. Isolated showers.

MONDAY
North to northeast winds 10 to 15 knots, decreasing to near 10 knots. Seas 2 to 4 feet, occasionally to 5 feet. Wave Detail: North to northeast 3 feet at 4 seconds. Isolated showers.

MONDAY NIGHT
Northeast to east winds near 10 knots. Seas 2 to 4 feet, occasionally to 5 feet, subsiding to 2 to 3 feet. Wave Detail: Northwest 3 feet at 7 seconds. Isolated showers.

TUESDAY
Northeast to east winds 5 to 10 knots. Seas 2 to 3 feet. Isolated showers.

TUESDAY NIGHT
East winds near 10 knots, becoming east to southeast 10 to 15 knots. Seas 2 to 3 feet. Isolated showers.

WEDNESDAY
Southeast to south winds 10 to 15 knots, becoming south to southwest near 10 knots. Seas subsiding to around 2 feet. Isolated showers.

WEDNESDAY NIGHT
Southwest to west near 10 knots, becoming northwest. Seas around 2 feet. Isolated showers.

THURSDAY
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.

THURSDAY NIGHT
Northeast winds 15 to 20 knots. Seas 3 to 5 feet, occasionally to 6 feet. Isolated showers.

FRIDAY AND FRIDAY NIGHT
Northeast to east winds 15 to 20 knots. Seas 3 to 5 feet, occasionally to 6 feet. Isolated showers.

---

BT/LIW