National Weather Service Marine Forecast FZUS52 KKEY

FZUS52 KKEY 230218
CWFKEY

Coastal Waters Forecast for the Florida Keys
National Weather Service Key West FL
1018 PM EDT Fri Sep 22 2023

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.

GMZ005-230900
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas 1018 PM EDT Fri Sep 22 2023

SYNOPSIS
Tropical Storm Ophelia will approach the coast of North Carolina overnight, then continue into the Delmarva Peninsula Saturday and Sunday. Meanwhile, a weak and disorganized trough axis will develop near and west of the Florida Keys. Breezes will be gentle to moderate at times through Sunday night, accompanied by unsettled weather featuring thundery squalls and locally heavy rainfall. Near to above normal rain and thunder chances will continue into next week with light to gentle easterly breezes.

The Approximate Shoreward Edge of the Gulf Stream as of September 21...

60 NM South of Dry Tortugas Light...on Loggerhead Key. 39 NM South of Cosgrove Shoal Light...off the Marquesas Keys. 33 NM South of Sand Key Light...off Key West. 26 NM South of Looe Key...off Big Pine Key. 21 NM South of Sombrero Key Light...off Marathon. 38 NM Southeast of Alligator Reef Light...off Islamorada.

Gulf Stream Information Courtesy of the Naval Oceanographic Office.

---

GMZ031-230900
Florida Bay including Barnes Sound, Blackwater Sound, and Buttonwood Sound
1018 PM EDT Fri Sep 22 2023

OVERNIGHT
Northeast to east winds near 10 knots. Bay waters a light chop. Winds higher and bay waters rough near numerous showers and scattered thunderstorms.

SATURDAY
Northeast to east winds near 10 knots. Bay waters a light chop. Numerous showers and scattered thunderstorms.

SATURDAY NIGHT
East winds 10 to 15 knots. Bay waters a light to moderate chop. Numerous showers and scattered thunderstorms.

SUNDAY
East to southeast winds near 10 knots. Bay waters a light chop. Numerous showers and scattered thunderstorms.

SUNDAY NIGHT
East to southeast winds near 10 knots. Bay waters a light chop. Scattered showers and thunderstorms.

MONDAY
Southeast winds 5 to 10 knots. Bay waters smooth to a light chop. Scattered showers and thunderstorms.

MONDAY NIGHT
East to southeast winds 5 to 10 knots. Bay waters smooth to a light chop. Scattered showers and thunderstorms.

TUESDAY
East winds 5 to 10 knots. Bay waters smooth to a light chop. Scattered showers and thunderstorms.

TUESDAY NIGHT
East winds near 10 knots. Bay waters a light chop. Scattered showers and thunderstorms.

WEDNESDAY
Northeast to east winds 5 to 10 knots. Bay waters smooth to a light chop. Scattered showers and thunderstorms.

WEDNESDAY NIGHT
Northeast to east winds near 10 knots. Bay waters a light chop. Scattered showers and thunderstorms.

---

GMZ032-035-230900
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
1018 PM EDT Fri Sep 22 2023

OVERNIGHT
Northeast to east winds near 10 knots. Seas building to 1 to 2 feet. Nearshore waters a light chop. Winds and seas higher near numerous showers and scattered thunderstorms.

SATURDAY
Northeast to east winds near 10 knots. Seas 1 to 2 feet. Nearshore waters a light chop. Numerous showers and scattered thunderstorms.

SATURDAY NIGHT
East winds 10 to 15 knots. Seas around 2 feet. Nearshore waters a light to moderate chop. Numerous showers and scattered thunderstorms.

SUNDAY
East to southeast winds near 10 knots. Seas 1 to 2 feet, subsiding to around 1 foot. Nearshore waters a light chop. Numerous showers and scattered thunderstorms.

SUNDAY NIGHT
East to southeast winds near 10 knots. Seas around 1 foot. Nearshore waters a light chop. Scattered showers and thunderstorms.

MONDAY
Southeast winds 5 to 10 knots. Seas 1 foot or less. Nearshore waters smooth to a light chop. Scattered showers and thunderstorms.

MONDAY NIGHT
East to southeast winds 5 to 10 knots. Seas 1 foot or less. Nearshore waters smooth to a light chop. Scattered showers and thunderstorms.

TUESDAY
East winds 5 to 10 knots. Seas 1 foot or less. Nearshore waters smooth to a light chop. Scattered showers and thunderstorms.

TUESDAY NIGHT
East winds near 10 knots. Seas around 1 foot. Nearshore waters a light chop. Scattered showers and thunderstorms.

WEDNESDAY
Northeast to east winds 5 to 10 knots. Seas 1 foot or less. Nearshore waters smooth to a light chop. Scattered showers and thunderstorms.

WEDNESDAY NIGHT
Northeast to east winds near 10 knots. Seas around 1 foot. Nearshore waters a light chop. Scattered showers and thunderstorms.

---

GMZ042>044-230900
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
1018 PM EDT Fri Sep 22 2023

OVERNIGHT
Northeast to east winds near 10 knots. Seas 1 to 2 feet. Nearshore waters a light chop. Winds and seas higher near numerous showers and scattered thunderstorms.

SATURDAY
East winds near 10 knots. Seas 1 to 2 feet. Nearshore waters a light chop. Numerous showers and scattered thunderstorms.

SATURDAY NIGHT
East winds 10 to 15 knots. Seas 1 to 3 feet. Nearshore waters a light to moderate chop. Numerous showers and scattered thunderstorms.

SUNDAY
East to southeast winds near 10 knots. Seas 1 to 2 feet. Nearshore waters a light chop. Numerous showers and scattered thunderstorms.

SUNDAY NIGHT
East to southeast winds near 10 knots. Seas 1 to 2 feet. Nearshore waters a light chop. Scattered showers and thunderstorms.

MONDAY
Southeast winds 5 to 10 knots. Seas around 1 foot. Nearshore waters smooth to a light chop. Scattered showers and thunderstorms.

MONDAY NIGHT
East to southeast winds near 10 knots. Seas 1 to 2 feet. Nearshore waters a light chop. Scattered showers and thunderstorms.

TUESDAY
East winds 5 to 10 knots. Seas around 1 foot. Nearshore waters smooth to a light chop. Scattered showers and thunderstorms.

TUESDAY NIGHT
East winds near 10 knots. Seas 1 to 2 feet. Nearshore waters a light chop. Scattered showers and thunderstorms.

WEDNESDAY
Northeast to east winds 5 to 10 knots. Seas around 1 foot. Nearshore waters smooth to a light chop. Scattered showers and thunderstorms.

WEDNESDAY NIGHT
Northeast to east winds near 10 knots. Seas 1 to 2 feet. Nearshore waters a light chop. Scattered showers and thunderstorms.

---

GMZ052>055-072>075-230900
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
1018 PM EDT Fri Sep 22 2023

OVERNIGHT
Northeast to east winds near 10 knots. Seas 1 to 2 feet, building to around 2 feet. Winds and seas higher near numerous showers and scattered thunderstorms.

SATURDAY
East winds near 10 knots. Seas around 2 feet, except 2 to 3 feet due to north swell southeast of the Upper Keys. Numerous showers and scattered thunderstorms.

SATURDAY NIGHT
East to southeast winds 10 to 15 knots. Seas 2 to 3 feet, except 3 to 4 feet due to north swell southeast of the Upper Keys. Numerous showers and scattered thunderstorms.

SUNDAY
East to southeast winds near 10 knots. Seas around 2 feet. Numerous showers and scattered thunderstorms.

SUNDAY NIGHT
East to southeast winds near 10 knots. Seas around 2 feet. Scattered showers and thunderstorms.

MONDAY
Southeast winds 5 to 10 knots. Seas 1 to 2 feet. Scattered showers and thunderstorms.

MONDAY NIGHT
East to southeast winds near 10 knots. Seas around 2 feet. Scattered showers and thunderstorms.

TUESDAY
East winds 5 to 10 knots. Seas 1 to 2 feet. Scattered showers and thunderstorms.

TUESDAY NIGHT
East winds near 10 knots. Seas around 2 feet. Scattered showers and thunderstorms.

WEDNESDAY
Northeast to east winds 5 to 10 knots. Seas 1 to 2 feet. Scattered showers and thunderstorms.

WEDNESDAY NIGHT
East winds near 10 knots. Seas around 2 feet. Scattered showers and thunderstorms.

---

GMZ033-034-230900
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
1018 PM EDT Fri Sep 22 2023

OVERNIGHT
Northeast winds 5 to 10 knots, becoming northeast to east and increasing to 10 to 15 knots. Seas around 1 foot, building to 2 to 3 feet. Winds and seas higher near numerous showers and scattered thunderstorms.

SATURDAY AND SATURDAY NIGHT
East winds 10 to 15 knots. Seas 2 to 3 feet. Numerous showers and scattered thunderstorms.

SUNDAY
East winds 10 to 15 knots, decreasing to near 10 knots in the afternoon. Seas 1 to 3 feet, subsiding to 1 to 2 feet. Numerous showers and scattered thunderstorms.

SUNDAY NIGHT
East to southeast winds 10 to 15 knots. Seas 1 to 3 feet. Numerous showers and scattered thunderstorms.

MONDAY
Southeast winds near 10 knots. Seas 1 to 2 feet. Scattered showers and thunderstorms.

MONDAY NIGHT
East to southeast winds 5 to 10 knots. Seas around 1 foot. Scattered showers and thunderstorms.

TUESDAY
East winds 5 to 10 knots. Seas around 1 foot. Scattered showers and thunderstorms.

TUESDAY NIGHT
East to southeast winds 5 to 10 knots. Seas around 1 foot. Scattered showers and thunderstorms.

WEDNESDAY
East winds 5 to 10 knots. Seas around 1 foot. Scattered showers and thunderstorms.

WEDNESDAY NIGHT
Northeast to east winds near 10 knots. Seas 1 to 2 feet. Scattered showers and thunderstorms.