105
FZUS52 KKEY 041418
CWFKEY

Coastal Waters Forecast for the Florida Keys
National Weather Service Key West FL
1018 AM EDT Thu Jun 4 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.

GMZ005-050230-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
1018 AM EDT Thu Jun 4 2026

.SYNOPSIS...The combination of an expansive eastern United States
surface high, a surface trough in the central Gulf will keep
breezes generally moderate over the next couple of days.
Uncertainty remains high, and periods of higher breezes will be
possible, especially due the continued above normal shower and
thunderstorm activity expected across the area. Rain chances
should trend downwards towards normal this weekend as drier air
moves in and breezes trend slightly downward.

The Approximate Shoreward Edge of the Gulf Stream as of May 30...

35 NM South of Dry Tortugas Light...on Loggerhead Key.
11 NM South of Cosgrove Shoal Light...off the Marquesas Keys.
10 NM South of Sand Key Light..modestly.off Key West.
 7 NM South of Looe Key...off Big Pine Key.
 7 NM Southeast of Sombrero Key Light...off Marathon.
 6 NM Southeast of Alligator Reef Light...off Islamorada.
 2 NM Southeast of Molasses Reef Light...off Key Largo.
 1 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.

$$

GMZ031-050230-
Florida Bay including Barnes Sound, Blackwater Sound, and
Buttonwood Sound-
1018 AM EDT Thu Jun 4 2026

.THIS AFTERNOON...Northeast to east winds near 10 knots,
increasing to 10 to 15 knots. Bay waters a light chop, becoming
a light to moderate chop. Showers with a chance of thunderstorms.
.TONIGHT...Northeast to east winds near 15 knots. Bay waters a
moderate chop. A chance of showers and thunderstorms.
.FRIDAY...Northeast to east winds near 15 knots. Bay waters a
moderate chop. A chance of showers and thunderstorms.
.FRIDAY NIGHT...Northeast to east winds near 15 knots. Bay waters
a moderate chop. A chance of showers and thunderstorms.
.SATURDAY...East winds 10 to 15 knots, increasing to near 15 knots.
Bay waters a light to moderate chop, becoming a moderate chop. A
chance of showers and thunderstorms.
.SATURDAY NIGHT...East winds decreasing to 10 to 15 knots. Bay
waters becoming a light to moderate chop. A slight chance of
showers and thunderstorms.
.SUNDAY...East winds 10 to 15 knots. Bay waters a light to
moderate chop. A slight chance of showers and thunderstorms.
.SUNDAY NIGHT...East to southeast winds near 10 knots. Bay waters
a light chop. A chance of showers and thunderstorms.
.MONDAY...Southeast winds near 5 knots, increasing to around
10 knots. Bay waters smooth, becoming a light chop. A chance of
showers and thunderstorms.
.MONDAY NIGHT...East to southeast winds 5 to 10 knots. Bay waters
smooth to a light chop. A chance of showers and thunderstorms.

$$

GMZ032-035-050230-
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-
1018 AM EDT Thu Jun 4 2026

.THIS AFTERNOON...East winds 10 to 15 knots. Seas 1 to 2 feet.
Nearshore waters a light to moderate chop. Showers with a chance
of thunderstorms.
.TONIGHT...East winds near 15 knots. Seas 1 to 2 feet. Nearshore
waters a moderate chop. Showers likely with a chance of
thunderstorms.
.FRIDAY...East winds near 15 knots. Seas 1 to 2 feet. Nearshore
waters a moderate chop. Showers likely with a chance of
thunderstorms.
.FRIDAY NIGHT...East winds near 15 knots. Seas 1 to 2 feet.
Nearshore waters a moderate chop. A chance of showers and
thunderstorms.
.SATURDAY...East winds 10 to 15 knots, increasing to near 15 knots.
Seas 1 to 2 feet. Nearshore waters a light to moderate chop. A
chance of showers and thunderstorms.
.SATURDAY NIGHT...East winds decreasing to 10 to 15 knots. Seas 1
to 2 feet. Nearshore waters becoming a light to moderate chop. A
chance of showers with a slight chance of thunderstorms.
.SUNDAY...East winds 10 to 15 knots. Seas 1 to 2 feet. Nearshore
waters a light to moderate chop. A slight chance of showers and
thunderstorms.
.SUNDAY NIGHT...East to southeast winds 10 to 15 knots, decreasing
to near 10 knots. Seas 1 to 2 feet. Nearshore waters a light to
moderate chop, becoming a light chop. A chance of showers and
thunderstorms.
.MONDAY...Southeast winds 5 to 10 knots. Seas 1 foot or less.
Nearshore waters smooth to a light chop. A slight chance of
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. A chance
of showers and thunderstorms.

$$

GMZ042>044-050230-
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 AM EDT Thu Jun 4 2026

.THIS AFTERNOON...East to southeast winds 10 to 15 knots. Seas 2
to 3 feet. Nearshore waters a light to moderate chop. Showers with
a chance of thunderstorms.
.TONIGHT...East winds near 15 knots. Seas 2 to 3 feet. Nearshore
waters a moderate chop. Showers likely with a chance of
thunderstorms.
.FRIDAY...East winds 10 to 15 knots, increasing to near 15 knots.
Seas 2 to 3 feet. Nearshore waters a light to moderate chop,
becoming a moderate chop. Showers likely with a chance of
thunderstorms.
.FRIDAY NIGHT...East winds near 15 knots. Seas 2 to 3 feet.
Nearshore waters a moderate chop. A chance of showers and
thunderstorms.
.SATURDAY...East winds 10 to 15 knots, increasing to near 15 knots.
Seas around 2 feet. Nearshore waters a light to moderate chop,
becoming a moderate chop. A chance of showers and thunderstorms.
.SATURDAY NIGHT...East winds decreasing to  10 to 15 knots. Seas
2 to 3 feet. Nearshore waters becoming a light to moderate chop.
A chance of showers with a slight chance of thunderstorms.
.SUNDAY...East winds 10 to 15 knots. Seas 1 to 2 feet. Nearshore
waters a light to moderate chop. A slight chance of showers and
thunderstorms.
.SUNDAY NIGHT...East to southeast winds 10 to 15 knots, decreasing
to near 10 knots. Seas 1 to 2 feet. Nearshore waters a light to
moderate chop, becoming a light chop. A chance of showers and
thunderstorms.
.MONDAY...Southeast winds 5 to 10 knots. Seas around 1 foot.
Nearshore waters smooth to a light chop. A slight chance of
showers and thunderstorms.
.MONDAY NIGHT...East to southeast winds 5 to 10 knots. Seas
around 1 foot. Nearshore waters smooth to a light chop. A chance
of showers and thunderstorms.

$$

GMZ052>055-072>075-050230-
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 AM EDT Thu Jun 4 2026

.THIS AFTERNOON...East winds 10 to 15 knots. Seas 3 to 4 feet,
occasionally to 5 feet. Wave Detail: East 3 feet at 5 seconds.
Showers likely with a chance of thunderstorms.
.TONIGHT...East winds 10 to 15 knots, increasing to near 15 knots.
Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: Northeast
to east 3 feet at 5 seconds. A chance of showers and
thunderstorms.
.FRIDAY...East winds 10 to 15 knots. Seas 3 to 4 feet,
occasionally to 5 feet. Wave Detail: East 3 feet at 5 seconds.
Showers likely with a chance of thunderstorms.
.FRIDAY NIGHT...East winds near 15 knots, decreasing to 10 to 15
knots. Seas 3 to 4 feet, occasionally to 5 feet. A chance of
showers and thunderstorms.
.SATURDAY...East winds 10 to 15 knots, increasing to near 15 knots.
Seas around 3 feet. A chance of showers and thunderstorms.
.SATURDAY NIGHT...East winds decreasing to 10 to 15 knots. Seas 3
to 4 feet, occasionally to 5 feet, subsiding to 2 to 3 feet. A
chance of showers with a slight chance of thunderstorms.
.SUNDAY...East winds near 10 knots. Seas 2 to 3 feet. A chance of
showers with a slight chance of thunderstorms.
.SUNDAY NIGHT...Southeast winds near 10 knots. Seas 1 to 2 feet.
A chance of showers with a slight chance of thunderstorms.
.MONDAY...East to southeast winds 5 to 10 knots. Seas 1 to
2 feet. A chance of showers with a slight chance of
thunderstorms.
.MONDAY NIGHT...East to southeast winds near 10 knots. Seas 1 to
2 feet. A chance of showers with a slight chance of
thunderstorms.

$$

GMZ033-034-050230-
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-
1018 AM EDT Thu Jun 4 2026

.THIS AFTERNOON...East winds 10 to 15 knots. Seas 2 to 3 feet.
Wave Detail: East 3 feet at 5 seconds. Showers with a chance of
thunderstorms.
.TONIGHT...East winds near 15 knots. Seas 2 to 3 feet. Wave
Detail: Northeast to east 3 feet at 4 seconds. Showers likely
with a chance of thunderstorms.
.FRIDAY...East winds 10 to 15 knots. Seas 2 to 3 feet. Wave
Detail: East 3 feet at 5 seconds. Showers likely with a chance of
thunderstorms.
.FRIDAY NIGHT...East winds 10 to 15 knots. Seas around 2 feet. A
chance of showers and thunderstorms.
.SATURDAY...East winds 10 to 15 knots. Seas 1 to 2 feet. A chance
of showers and thunderstorms.
.SATURDAY NIGHT...East winds 10 to 15 knots. Seas 1 to 2 feet. A
chance of showers with a slight chance of thunderstorms.
.SUNDAY...East winds 10 to 15 knots. Seas 1 to 2 feet. A slight
chance of showers and thunderstorms.
.SUNDAY NIGHT...East to southeast winds 10 to 15 knots, decreasing
to near 10 knots. Seas 1 to 2 feet. A chance of showers and
thunderstorms.
.MONDAY...East to southeast winds 5 to 10 knots. Seas around
1 foot. A slight chance of showers and thunderstorms.
.MONDAY NIGHT...East to southeast winds 5 to 10 knots. Seas
around 1 foot. A chance of showers and thunderstorms.

$$