693
FZUS52 KKEY 092027
CWFKEY

Coastal Waters Forecast for the Florida Keys
National Weather Service Key West FL
427 PM EDT Fri May 9 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.

GMZ005-100230-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
427 PM EDT Fri May 9 2025

.SYNOPSIS...
An Atlantic ridge extending over the Florida Peninsula will shift
eastward this weekend, as troughing develops over the Southeast
and northern Gulf. Gentle to moderate southeasterly breezes will
lull during the afternoon and peak late in the evening through the
early morning hours for the next couple days. A surface low will
develop over the north central Gulf by this weekend, then lift
slowly northward over the Southeast early next week. An associated
front will approach the Florida Keys coastal waters during the
early to middle part of next week, preceded by freshening breezes
and increasing chances for showers and thunderstorms.

The Approximate Shoreward Edge of the Gulf Stream as of May 5th...

33 NM South of Dry Tortugas Light...on Loggerhead Key.
17 NM South of Cosgrove Shoal Light...off the Marquesas Keys.
 7 NM South of Sand Key Light...off Key West.
 9 NM South of Looe Key...off Big Pine Key.
13 NM South of Sombrero Key Light...off Marathon.
18 NM Southeast of Alligator Reef Light...off Islamorada.
 9 NM Southeast of Molasses Reef Light...off Key Largo.
 4 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 NASA SPoRT.

$$

GMZ031-100230-
Florida Bay including Barnes Sound, Blackwater Sound, and
Buttonwood Sound-
427 PM EDT Fri May 9 2025

.TONIGHT...Southeast winds near 10 knots, increasing to 10 to 15
knots. Bay waters a light chop, becoming a light to moderate
chop. Isolated showers.
.SATURDAY...Southeast winds near 15 knots, decreasing to 10 to 15
knots. Bay waters a moderate chop, becoming a light to moderate
chop. Isolated showers and thunderstorms.
.SATURDAY 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. Scattered showers and isolated
thunderstorms.
.SUNDAY...Southeast winds near 15 knots, decreasing to 10 to 15
knots. Bay waters a moderate chop, becoming a light to moderate
chop. Scattered showers and thunderstorms.
.SUNDAY NIGHT...East to southeast winds near 15 knots. Bay waters
moderate chop. Scattered showers and thunderstorms.
.MONDAY...Southeast winds near 15 knots, decreasing to 10 to 15
knots. Bay waters a moderate chop, becoming a light to moderate
chop. Numerous showers and scattered thunderstorms.
.MONDAY NIGHT...Southeast to south winds 10 to 15 knots. Bay
waters a light to moderate chop. Numerous showers and scattered
thunderstorms.
.TUESDAY...South to southwest winds 10 to 15 knots, decreasing to
near 10 knots. Bay waters a light to moderate chop, becoming a
light chop. Scattered showers and thunderstorms.
.TUESDAY NIGHT...Southwest to west winds 5 to 10 knots. Bay
waters smooth to a light chop. Scattered showers and
thunderstorms.
.WEDNESDAY...Northeast winds near 5 knots, becoming southeast.
Bay waters smooth. Scattered showers and isolated thunderstorms.
.WEDNESDAY NIGHT...Southeast winds near 5 knots. Bay waters
smooth. Isolated showers.

$$

GMZ032-035-100230-
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-
427 PM EDT Fri May 9 2025

.TONIGHT...Southeast winds near 10 knots, increasing to near 15
knots. Seas 1 to 2 feet. Nearshore waters a light chop, becoming a
moderate chop. Isolated showers.
.SATURDAY...Southeast winds near 15 knots, decreasing to 10 to 15
knots. Seas 1 to 2 feet. Nearshore waters a moderate chop,
becoming a light to moderate chop. Isolated showers and
thunderstorms.
.SATURDAY NIGHT...East to southeast winds near 15 knots,
increasing to 15 to 20 knots. Seas 1 to 2 feet. Nearshore waters
a moderate chop, becoming choppy. Scattered showers and isolated
thunderstorms.
.SUNDAY...Southeast winds 15 to 20 knots. Seas 1 to 2 feet,
except 2 to 3 feet west of the Marquesas Keys. Nearshore waters
choppy. Scattered showers and thunderstorms.
.SUNDAY NIGHT...East to southeast winds 15 to 20 knots. Seas 1 to
2 feet, except 2 to 3 feet west of the Marquesas Keys. Nearshore
waters choppy. Numerous showers and scattered thunderstorms.
.MONDAY...Southeast winds near 15 knots, decreasing to 10 to 15
knots. Seas 1 to 2 feet, except 2 to 3 feet west of the Marquesas
Keys. Nearshore waters a moderate chop, becoming a light to
moderate chop. Numerous showers and scattered thunderstorms.
.MONDAY NIGHT...Southeast to south winds 10 to 15 knots. Seas
1 to 2 feet. Nearshore waters a light to moderate chop. Numerous
showers and scattered thunderstorms.
.TUESDAY...Southwest winds near 10 knots. Seas 1 to 2 feet,
subsiding to around 1 foot. Nearshore waters a light chop.
Scattered showers and thunderstorms.
.TUESDAY NIGHT...Northwest winds 5 to 10 knots. Seas around 1
foot. Nearshore waters smooth to a light chop. Scattered showers
and thunderstorms.
.WEDNESDAY...Northeast winds near 5 knots. Seas around 1 foot.
Nearshore waters smooth. Scattered showers and isolated
thunderstorms.
.WEDNESDAY NIGHT...North to northeast winds near 5 knots,
becoming east to southeast. Seas 1 foot or less. Nearshore waters
smooth. Isolated showers.

$$

GMZ042>044-100230-
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-
427 PM EDT Fri May 9 2025

.TONIGHT...Southeast winds near 10 knots, increasing to near 15
knots. Seas 2 to 3 feet. Nearshore waters a light chop, becoming a
moderate chop. Isolated showers.
.SATURDAY...Southeast winds near 15 knots, decreasing to 10 to 15
knots. Seas 2 to 3 feet. Nearshore waters moderate chop, becoming
a light to moderate chop. Isolated showers and thunderstorms.
.SATURDAY NIGHT...East to southeast winds 15 to 20 knots. Seas
2 to 4 feet, occasionally to 5 feet. Nearshore waters choppy.
Scattered showers and isolated thunderstorms.
.SUNDAY...Southeast winds 15 to 20 knots. Seas 2 to 4 feet,
occasionally to 5 feet. Nearshore waters choppy. Scattered
showers and thunderstorms.
.SUNDAY NIGHT...East to southeast winds 15 to 20 knots. Seas 2 to
4 feet, occasionally to 5 feet. Nearshore waters choppy.
Scattered showers and thunderstorms.
.MONDAY...Southeast winds near 15 knots, decreasing to 10 to 15
knots. Seas 2 to 4 feet, occasionally to 5 feet, subsiding to 2 to
3 feet. Nearshore waters a moderate chop, becoming a light to
moderate chop. Numerous showers and scattered thunderstorms.
.MONDAY NIGHT...Southeast to south winds near 10 knots. Seas 1 to
2 feet. Nearshore waters a light chop. Numerous showers and
scattered thunderstorms.
.TUESDAY...Southwest winds near 10 knots. Seas 1 to 2 feet.
Nearshore waters a light chop. Scattered showers and
thunderstorms.
.TUESDAY NIGHT...Northwest to north winds 5 to 10 knots. Seas
around 1 foot. Nearshore waters smooth to a light chop. Scattered
showers and thunderstorms.
.WEDNESDAY...Northeast to east winds near 5 knots. Seas around
1 foot. Nearshore waters smooth. Scattered showers and isolated
thunderstorms.
.WEDNESDAY NIGHT...East winds near 5 knots. Seas around 1 foot.
Nearshore waters smooth. Isolated showers.

$$

GMZ052>055-072>075-100230-
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-
427 PM EDT Fri May 9 2025

.TONIGHT...East to southeast winds 10 to 15 knots, increasing to
near 15 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave
Detail: East to southeast 3 feet at 4 seconds. Isolated showers.
.SATURDAY...Southeast winds 15 to 20 knots, becoming east to
southeast 10 to 15 knots. Seas 3 to 4 feet, occasionally to 5
feet. Wave Detail: East to southeast 4 feet at 5 seconds. Isolated
showers and thunderstorms.
.SATURDAY NIGHT...East to southeast winds 10 to 15 knots,
becoming southeast 15 to 20 knots. Seas 3 to 5 feet, occasionally
to 6 feet. Wave Detail: East to southeast 4 feet at 5 seconds.
Scattered showers and isolated thunderstorms.
.SUNDAY...Southeast winds 15 to 20 knots, becoming east to
southeast 10 to 15 knots. Seas 3 to 5 feet, occasionally to 6
feet. Scattered showers and thunderstorms.
.SUNDAY NIGHT...East to southeast winds 15 to 20 knots. Seas 3 to
4 feet, occasionally to 5 feet. Scattered showers and
thunderstorms.
.MONDAY...Southeast winds near 15 knots, decreasing to 10 to 15
knots. Seas 2 to 4 feet, occasionally to 5 feet. Numerous showers
and scattered thunderstorms.
.MONDAY NIGHT...Southeast to south winds 10 to 15 knots. Seas
2 to 3 feet. Numerous showers and scattered thunderstorms.
.TUESDAY...South winds near 10 knots, becoming east to southeast.
Seas 1 to 2 feet. Numerous showers and scattered thunderstorms.
.TUESDAY NIGHT...Northeast to east winds near 10 knots. Seas 1 to
2 feet. Scattered showers and thunderstorms.
.WEDNESDAY...Northeast to east winds 5 to 10 knots. Seas 1 to
2 feet. Scattered showers and isolated thunderstorms.
.WEDNESDAY NIGHT...East winds 5 to 10 knots. Seas 1 to 2 feet.
Isolated showers.

$$

GMZ033-034-100230-
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-
427 PM EDT Fri May 9 2025

.TONIGHT...Southeast winds 10 to 15 knots, increasing to near 15
knots. Seas 1 to 2 feet, building to around 2 feet. Wave Detail:
East to southeast 2 feet at 4 seconds. Isolated showers.
.SATURDAY...Southeast winds near 15 knots, decreasing to 10 to 15
knots. Seas 2 to 3 feet. Wave Detail: Southeast 3 feet at 4
seconds. Scattered showers and isolated thunderstorms.
.SATURDAY NIGHT...East to southeast winds 10 to 15 knots,
becoming southeast 15 to 20 knots. Seas 2 to 3 feet. Wave Detail:
Southeast 3 feet at 4 seconds. Scattered showers and isolated
thunderstorms.
.SUNDAY...Southeast winds 15 to 20 knots, decreasing to 10 to 15
knots. Seas 2 to 4 feet, occasionally to 5 feet. Scattered
showers and thunderstorms.
.SUNDAY NIGHT...Southeast winds 10 to 15 knots. Seas 2 to 3 feet.
Widespread showers and scattered thunderstorms.
.MONDAY...Southeast to south winds 10 to 15 knots. Seas 2 to
3 feet. Widespread showers and scattered thunderstorms.
.MONDAY NIGHT...South winds near 10 knots. Seas 1 to 2 feet.
Numerous showers and scattered thunderstorms.
.TUESDAY...West winds 5 to 10 knots. Seas 1 to 2 feet. Scattered
showers and thunderstorms.
.TUESDAY NIGHT...Northwest to north winds 5 to 10 knots. Seas
1 to 2 feet. Scattered showers and thunderstorms.
.WEDNESDAY...North to northeast winds 5 to 10 knots. Seas 1 to
2 feet. Isolated showers and thunderstorms.
.WEDNESDAY NIGHT...Northeast winds near 5 knots. Seas around
1 foot. Isolated showers.

$$

AP