748
FZUS52 KKEY 120807
CWFKEY

Coastal Waters Forecast for the Florida Keys
National Weather Service Key West FL
407 AM EDT Mon May 12 2025

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.

GMZ005-122015-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
407 AM EDT Mon May 12 2025

.SYNOPSIS...
Deep troughing over the Gulf is still in place with a plume of
abundant moisture encompassing most of the forecast area.
Moderate to occasionally fresh southeast to south breezes will
veer southwesterly while the heart of the parent low meanders
along the northern Gulf. Scattered to numerous showers with
embedded isolated to scattered thunderstorms will continue through
early Tuesday. As the low lifts toward the northeast during the
middle of the week, higher pressure will be able to fill in behind
it, encouraging drier weather and slackening breezes.

The Approximate Shoreward Edge of the Gulf Stream as of May 10th...

22 NM South of Dry Tortugas Light...on Loggerhead Key.
 8 NM South of Cosgrove Shoal Light...off the Marquesas Keys.
 6 NM South of Sand Key Light...off Key West.
 5 NM South of Looe Key...off Big Pine Key.
 7 NM South of Sombrero Key Light...off Marathon.
12 NM Southeast of Alligator Reef Light...off Islamorada.
 8 NM Southeast of Molasses Reef Light...off Key Largo.
 2 NM East of Carysfort Reef Light...off Ocean Reef.

Gulf Stream Information Courtesy of the Naval Oceanographic
Office.

$$

GMZ031-122015-
Florida Bay including Barnes Sound, Blackwater Sound, and
Buttonwood Sound-
407 AM EDT Mon May 12 2025

.TODAY...Southeast to south winds near 15 knots, becoming south
and decreasing to 10 to 15 knots. Bay waters a moderate chop,
becoming a light to moderate chop. Winds higher and bay waters
rough in and near numerous showers and scattered thunderstorms.
.TONIGHT...South to southwest winds near 10 knots, decreasing to 5
to 10 knots. Bay waters a light chop, becoming smooth to a light
chop. Winds highs and bay waters rough in and near numerous
showers and scattered thunderstorms.
.TUESDAY...Southwest to west winds 5 to 10 knots. Bay waters
smooth to a light chop. Scattered showers and isolated
thunderstorms.
.TUESDAY NIGHT...West to northwest winds near 5 knots, becoming
variable. Bay waters smooth. Scattered showers and isolated
thunderstorms.
.WEDNESDAY...Variable winds near 5 knots, becoming southeast to
south. Bay waters smooth. Isolated showers.
.WEDNESDAY NIGHT...Southeast to south winds near 5 knots,
becoming east to southeast. Bay waters smooth. Isolated showers.
.THURSDAY THROUGH FRIDAY...East to southeast winds near 5 knots.
Bay waters smooth. Isolated showers.
.FRIDAY NIGHT...East to southeast winds increasing to 5 to 10
knots. Bay waters becoming smooth to a light chop. Isolated
showers.

$$

GMZ032-035-122015-
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-
407 AM EDT Mon May 12 2025

.TODAY...South winds near 15 knots, becoming south to southwest.
Seas 1 to 2 feet. Nearshore waters a moderate chop. Winds and seas
higher in and near widespread showers and scattered thunderstorms.
.TONIGHT...Southwest winds near 15 knots, becoming southwest to
west and decreasing to 10 to 15 knots. Seas 1 to 2 feet. Nearshore
waters a moderate chop, becoming a light to moderate chop. Winds
and seas higher in and near numerous showers and scattered
thunderstorms.
.TUESDAY...West winds near 10 knots, becoming west to northwest
and decreasing to 5 to 10 knots. Seas 1 to 2 feet, subsiding to
around 1 foot. Nearshore waters a light chop, becoming smooth to a
light chop. Scattered showers and isolated thunderstorms.
.TUESDAY NIGHT...Northwest winds 5 to 10 knots, becoming variable.
Seas around 1 foot. Nearshore waters smooth to a light chop.
Isolated showers and thunderstorms.
.WEDNESDAY...Variable winds near 5 knots, becoming east to
southeast. Seas around 1 foot. Nearshore waters smooth. Isolated
showers.
.WEDNESDAY NIGHT THROUGH FRIDAY...East to southeast winds near 5
knots. Seas 1 foot or less. Nearshore waters smooth. Isolated
showers.
.FRIDAY NIGHT...East to southeast winds increasing to 5 to 10
knots. Seas 1 foot or less. Nearshore waters becoming smooth to a
light chop.

$$

GMZ042>044-122015-
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-
407 AM EDT Mon May 12 2025

.TODAY...Southeast to south winds near 15 knots, becoming south to
southwest and decreasing to 10 to 15 knots. Seas 2 to 3 feet,
subsiding to around 2 feet. Nearshore waters a moderate chop,
becoming a light to moderate chop. Winds and seas higher in and
near numerous showers and scattered thunderstorms.
.TONIGHT...Southwest winds 10 to 15 knots, decreasing to near 10
knots. Seas around 2 feet, subsiding to 1 to 2 feet. Nearshore
waters a light to moderate chop, becoming a light chop. Winds and
seas higher in and near numerous showers and scattered
thunderstorms.
.TUESDAY...West winds near 10 knots, becoming west to northwest
and decreasing to 5 to 10 knots. Seas 1 to 2 feet. Nearshore
waters a light chop, becoming smooth to a light chop. Scattered
showers and isolated thunderstorms.
.TUESDAY NIGHT...Northwest winds 5 to 10 knots, becoming variable.
Seas 1 to 2 feet, subsiding to around 1 foot. Nearshore waters
smooth to a light chop. Scattered showers and isolated
thunderstorms.
.WEDNESDAY...Variable winds decreasing to near 5 knots, becoming
east to southeast. Seas around 1 foot. Nearshore waters becoming
smooth. Isolated showers.
.WEDNESDAY NIGHT THROUGH FRIDAY...East to southeast winds near 5
knots. Seas around 1 foot. Nearshore waters smooth. Isolated
showers.
.FRIDAY NIGHT...East to southeast winds increasing to 5 to 10
knots. Seas around 1 foot. Nearshore waters becoming smooth to a
light chop. Isolated showers.

$$

GMZ052>055-072>075-122015-
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-
407 AM EDT Mon May 12 2025

.TODAY...Southeast to south winds near 15 knots, becoming south to
southwest and decreasing to 10 to 15 knots. Seas 2 to 4 feet,
occasionally to 5 feet. Wave Detail: Southeast 4 feet at 5
seconds. Winds and seas higher in and near numerous showers and
scattered thunderstorms.
.TONIGHT...South to southwest winds 10 to 15 knots, becoming west
and decreasing to near 10 knots. Seas 2 to 4 feet, occasionally to
5 feet, subsiding to 2 to 3 feet. Wave Detail: East to southeast
2 feet at 5 seconds and west 1 foot at 6 seconds. Winds and seas
higher in and near numerous showers and scattered thunderstorms.
.TUESDAY...West winds near 10 knots, becoming west to northwest
and decreasing to 5 to 10 knots. Seas 2 to 3 feet, subsiding to 1
to 2 feet. Wave Detail: East 1 foot at 5 seconds and west 1 foot
at 5 seconds. Scattered showers and isolated thunderstorms.
.TUESDAY NIGHT...Northwest to north winds 5 to 10 knots, becoming
variable and decreasing to near 5 knots. Seas 1 to 2 feet.
Scattered showers and isolated thunderstorms.
.WEDNESDAY...Variable winds near 5 knots, becoming east. Seas 1
to 2 feet, subsiding to around 1 foot. Isolated showers.
.WEDNESDAY NIGHT AND THURSDAY...East winds near 5 knots. Seas
around 1 foot. Isolated showers.
.THURSDAY NIGHT...East winds near 5 knots, increasing to 5 to 10
knots. Seas around 1 foot. Isolated showers.
.FRIDAY...East to southeast winds 5 to 10 knots. Seas around
1 foot. Isolated showers.
.FRIDAY NIGHT...East winds increasing to near 10 knots. Seas
building to 1 to 2 feet. Isolated showers.

$$

GMZ033-034-122015-
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-
407 AM EDT Mon May 12 2025

.TODAY...South winds near 15 knots, becoming south to southwest.
Seas around 2 feet. Wave Detail: South 2 feet at 5 seconds.
Winds and seas higher in and near widespread showers and
scattered thunderstorms.
.TONIGHT...Southwest to west winds near 15 knots, becoming west
and decreasing to 10 to 15 knots. Seas around 2 feet, subsiding
to 1 to 2 feet. Wave Detail: Southeast 1 foot at 3 seconds and
southwest to west 1 foot at 5 seconds. Winds and seas higher in
and near numerous showers and scattered thunderstorms.
.TUESDAY...West to northwest winds near 10 knots, becoming
northwest and decreasing to 5 to 10 knots. Seas 1 to 2 feet. Wave
Detail: West 1 foot at 6 seconds. Scattered showers and isolated
thunderstorms.
.TUESDAY NIGHT...Northwest winds 5 to 10 knots, becoming variable
and decreasing to near 5 knots. Seas 1 to 2 feet, subsiding to
around 1 foot. Isolated showers and thunderstorms.
.WEDNESDAY...Variable winds near 5 knots, becoming northeast.
Seas around 1 foot.
.WEDNESDAY NIGHT...Variable winds near 5 knots, becoming east to
southeast. Seas around 1 foot.
.THURSDAY THROUGH FRIDAY NIGHT...East to southeast winds near 5
knots. Seas around 1 foot.

$$

DP