659
FZUS52 KKEY 120819
CWFKEY

Coastal Waters Forecast for the Florida Keys
National Weather Service Key West FL
419 AM EDT Tue May 12 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.

GMZ005-122030-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
419 AM EDT Tue May 12 2026

.SYNOPSIS...Breezes are light to gentle across the Florida Keys
waters this morning. The lack of a strong pressure gradient
suggests variable conditions are possible tonight, but a shift
towards westerlies is expected on Wednesday. Local freshening of
breezes near South Florida is possible during the middle of the
week. Shower chances will remain on the lower side while drier air
masses linger over the Keys.

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

35 NM South of Dry Tortugas Light...on Loggerhead Key.
 9 NM South of Cosgrove Shoal Light...off the Marquesas Keys.
 6 NM South of Sand Key Light...off Key West.
 7 NM South of Looe Key...off Big Pine Key.
 6 NM Southeast of Sombrero Key Light...off Marathon.
 6 NM Southeast of Alligator Reef Light...off Islamorada.
 4 NM Southeast of Molasses Reef Light...off Key Largo.
 3 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.

$$

GMZ031-122030-
Florida Bay including Barnes Sound, Blackwater Sound, and
Buttonwood Sound-
419 AM EDT Tue May 12 2026

.TODAY...Southeast to south winds 5 to 10 knots. Bay waters
smooth to a light chop. A chance of showers with a slight chance
of thunderstorms.
.TONIGHT...Southeast to south winds near 5 knots. Bay waters
smooth.
.WEDNESDAY...Southwest to west winds near 5 knots, increasing to
10 to 15 knots. Bay waters smooth, becoming a light to moderate
chop. A chance of showers with a slight chance of thunderstorms.
.WEDNESDAY NIGHT...West winds 10 to 15 knots. Bay waters a light
to moderate chop. A chance of showers with a slight chance of
thunderstorms.
.THURSDAY...West winds 10 to 15 knots. Bay waters a light to
moderate chop. A slight chance of showers and thunderstorms.
.THURSDAY NIGHT...West to northwest winds 10 to 15 knots,
decreasing to near 10 knots. Bay waters a light to moderate chop,
becoming a light chop.
.FRIDAY...Northwest to north winds near 5 knots, becoming south
to southwest. Bay waters smooth, becoming smooth to a light chop.
.FRIDAY NIGHT...South to southwest winds near 5 knots, becoming
northeast to east. Bay waters smooth.
.SATURDAY...East to southeast winds 5 to 10 knots. Bay waters
smooth to a light chop. A slight chance of showers and
thunderstorms.
.SATURDAY NIGHT...East winds near 10 knots. Bay waters a light
chop. A slight chance of showers and thunderstorms.

$$

GMZ032-035-122030-
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-
419 AM EDT Tue May 12 2026

.TODAY...Southeast to south winds 5 to 10 knots. Seas 1 foot or
less. Nearshore waters smooth to a light chop. A slight chance of
showers and thunderstorms.
.TONIGHT...Variable winds near 5 knots. Seas 1 foot or less.
Nearshore waters smooth.
.WEDNESDAY...Southwest to west winds near 5 knots, increasing to
10 to 15 knots. Seas 1 foot or less. Nearshore waters smooth,
becoming a light to moderate chop. A chance of showers with a
slight chance of thunderstorms.
.WEDNESDAY NIGHT...West to northwest winds 10 to 15 knots. Seas
1 to 2 feet. Nearshore waters a light to moderate chop. A slight
chance of showers and thunderstorms.
.THURSDAY...West to northwest winds near 10 knots. Seas around
1 foot. Nearshore waters a light chop. A slight chance of showers
and thunderstorms.
.THURSDAY NIGHT...Northwest to north winds near 10 knots. Seas
around 1 foot. Nearshore waters a light chop.
.FRIDAY...North winds 5 to 10 knots, becoming variable near 5
knots. Seas 1 foot or less. Nearshore waters smooth to a light
chop, becoming smooth.
.FRIDAY NIGHT...Variable winds near 5 knots. Seas 1 foot or less.
Nearshore waters smooth. A slight chance of showers.
.SATURDAY...East to southeast winds 5 to 10 knots. Seas 1 foot or
less. Nearshore waters smooth to a light chop. A slight chance of
showers.
.SATURDAY NIGHT...East to 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.

$$

GMZ042>044-122030-
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-
419 AM EDT Tue May 12 2026

.TODAY...East to southeast winds 5 to 10 knots. Seas around 1
foot. Nearshore waters smooth to a light chop. A slight chance of
showers and thunderstorms.
.TONIGHT...Variable winds near 5 knots. Seas around 1 foot.
Nearshore waters smooth.
.WEDNESDAY...Southwest to west winds 5 to 10 knots, increasing to
10 to 15 knots. Seas around 1 foot. Nearshore waters smooth to a
light chop, becoming a light to moderate chop. A slight chance of
showers and thunderstorms.
.WEDNESDAY NIGHT...West winds 10 to 15 knots. Seas around 1 foot.
Nearshore waters a light to moderate chop. A slight chance of
showers and thunderstorms.
.THURSDAY...West to northwest winds 10 to 15 knots. Seas around
1 foot. Nearshore waters a light to moderate chop. A slight
chance of showers and thunderstorms.
.THURSDAY NIGHT...Northwest to north winds 10 to 15 knots,
decreasing to near 10 knots. Seas around 1 foot. Nearshore waters
a light to moderate chop, becoming a light chop.
.FRIDAY...North winds near 5 knots, becoming variable. Seas 1
foot or less. Nearshore waters smooth.
.FRIDAY NIGHT...Variable winds near 5 knots. Seas 1 foot or less.
Nearshore waters smooth. A slight chance of showers.
.SATURDAY...East winds 5 to 10 knots. Seas 1 foot or less.
Nearshore waters smooth to a light chop. A slight chance of
showers.
.SATURDAY NIGHT...East to southeast winds 5 to 10 knots. Seas
around 1 foot. Nearshore waters smooth to a light chop. A slight
chance of showers and thunderstorms.

$$

GMZ052>055-072>075-122030-
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-
419 AM EDT Tue May 12 2026

.TODAY...East to southeast winds 5 to 10 knots. Seas around 1
foot. Wave Detail: East to southeast 1 foot at 4 seconds. A slight
chance of showers and thunderstorms.
.TONIGHT...Variable winds near 5 knots. Seas around 1 foot. Wave
Detail: East to southeast 1 foot at 4 seconds. A slight chance of
showers and thunderstorms.
.WEDNESDAY...Southwest to west winds near 5 knots, becoming west
10 to 15 knots. Seas around 1 foot. Wave Detail: West 1 foot at 2
seconds and east to southeast 1 foot at 4 seconds. A slight
chance of showers and thunderstorms.
.WEDNESDAY NIGHT...West winds 10 to 15 knots. Seas 1 to 2 feet. A
slight chance of showers and thunderstorms.
.THURSDAY...West to northwest winds near 10 knots. Seas 1 to 2
feet. A slight chance of showers and thunderstorms.
.THURSDAY NIGHT...Northwest to north winds 5 to 10 knots. Seas
1 to 2 feet.
.FRIDAY...North winds 5 to 10 knots, becoming northeast to east
near 5 knots. Seas around 1 foot.
.FRIDAY NIGHT...Northeast to east winds near 5 knots. Seas around
1 foot. A slight chance of showers and thunderstorms.
.SATURDAY...East winds 5 to 10 knots. Seas 1 to 2 feet. A slight
chance of showers and thunderstorms.
.SATURDAY NIGHT...East winds near 10 knots. Seas 1 to 2 feet. A
slight chance of showers and thunderstorms.

$$

GMZ033-034-122030-
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-
419 AM EDT Tue May 12 2026

.TODAY...East to southeast winds near 5 knots, becoming variable.
Seas 1 foot or less. A slight chance of showers and thunderstorms.
.TONIGHT...Variable winds near 5 knots. Seas 1 foot or less. A
slight chance of showers and thunderstorms.
.WEDNESDAY...Southwest to west winds near 5 knots, becoming west
near 10 knots. Seas 1 foot or less. Wave Detail: Southwest to
west 1 foot at 2 seconds. A slight chance of showers and
thunderstorms.
.WEDNESDAY NIGHT...West to northwest winds 10 to 15 knots. Seas
building to 1 to 2 feet. A slight chance of showers and
thunderstorms.
.THURSDAY...Northwest winds near 10 knots, decreasing to 5 to 10
knots. Seas 1 to 2 feet.
.THURSDAY NIGHT...Northwest to north winds 5 to 10 knots. Seas
1 to 2 feet.
.FRIDAY...Variable winds near 5 knots. Seas 1 to 2 feet.
.FRIDAY NIGHT...North to northeast winds near 5 knots. Seas
around 1 foot.
.SATURDAY...East winds near 5 knots. Seas around 1 foot.
.SATURDAY NIGHT...East winds 5 to 10 knots. Seas around 1 foot. A
slight chance of showers and thunderstorms.

$$

AJP