FZUS52 KKEY 212028
CWFKEY
Coastal Waters Forecast for the Florida Keys
National Weather Service Key West FL
428 PM EDT Mon Apr 21 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.
GMZ005-220230-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
428 PM EDT Mon Apr 21 2025
.SYNOPSIS...Even though the high has weakened slightly throughout
the day, expect this high to continue to meander for the next
several days north of The Bahamas leading to peaking winds at
night and lulling during the day. Another surge in northeast to
east breezes is possible Thursday into the weekend as the high
strengthens and drifts back westward.
The Approximate Shoreward Edge of the Gulf Stream as of April 16...
30 NM South of Dry Tortugas Light...on Loggerhead Key.
8 NM South of Cosgrove Shoal Light...off the Marquesas Keys.
5 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.
15 NM Southeast of Alligator Reef Light...off Islamorada.
14 NM Southeast of Molasses Reef Light...off Key Largo.
12 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.
$$
GMZ031-220230-
Florida Bay including Barnes Sound, Blackwater Sound, and
Buttonwood Sound-
428 PM EDT Mon Apr 21 2025
.TONIGHT...East winds near 15 knots. Bay waters a moderate chop.
.TUESDAY...East winds near 15 knots, decreasing to 10 to 15
knots. Bay waters a moderate chop, becoming a light to moderate
chop.
.TUESDAY NIGHT...East winds near 15 knots. Bay waters a moderate
chop.
.WEDNESDAY...East winds near 15 knots. Bay waters a moderate
chop.
.WEDNESDAY NIGHT...Northeast to east winds near 15 knots. Bay
waters a moderate chop.
.THURSDAY...East winds 15 to 20 knots. Bay waters choppy.
Isolated showers.
.THURSDAY NIGHT...Northeast to east winds 15 to 20 knots,
increasing to near 20 knots. Bay waters choppy, becoming rough.
Isolated showers.
.FRIDAY...East winds near 20 knots. Bay waters rough. Isolated
showers.
.FRIDAY NIGHT...Northeast to east winds 15 to 20 knots. Bay
waters choppy. Isolated showers.
.SATURDAY...East winds near 15 knots. Bay waters a moderate chop.
Isolated showers.
.SATURDAY NIGHT...Northeast to east winds 10 to 15 knots. Bay
waters a light to moderate chop. Isolated showers.
$$
GMZ032-035-220230-
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-
428 PM EDT Mon Apr 21 2025
...SMALL CRAFT SHOULD EXERCISE CAUTION FOR INCREASING WINDS...
.TONIGHT...East winds near 15 knots, increasing to 15 to 20 knots.
Seas 1 to 2 feet, except around 3 feet west of the Marquesas
Keys. Nearshore waters a moderate chop, becoming choppy.
.TUESDAY...East to southeast winds near 15 knots. Seas 1 to 2
feet, except 2 to 3 feet west of the Marquesas Keys. Nearshore
waters a moderate chop.
.TUESDAY NIGHT...East winds near 15 knots. Seas 1 to 2 feet.
Nearshore waters a moderate chop.
.WEDNESDAY...East winds near 15 knots. Seas 1 to 2 feet.
Nearshore waters a moderate chop.
.WEDNESDAY NIGHT...East winds 15 to 20 knots. Seas 1 to 2 feet.
Nearshore waters choppy.
.THURSDAY...East winds 15 to 20 knots. Seas 1 to 2 feet.
Nearshore waters choppy. Isolated showers.
.THURSDAY NIGHT...East winds near 20 knots. Seas 2 to 3 feet.
Nearshore waters rough. Isolated showers.
.FRIDAY...East winds near 20 knots. Seas 2 to 3 feet. Nearshore
waters rough. Isolated showers.
.FRIDAY NIGHT...East winds near 20 knots, decreasing to 15 to 20
knots. Seas 2 to 3 feet. Nearshore waters rough, becoming choppy.
Isolated showers.
.SATURDAY...East winds near 15 knots. Seas 1 to 3 feet. Nearshore
waters a moderate chop. Isolated showers.
.SATURDAY NIGHT...East winds 10 to 15 knots. Seas 1 to 2 feet.
Nearshore waters a light to moderate chop. Isolated showers.
$$
GMZ042>044-220230-
Hawk Channel from Ocean Reef to Craig Key out to the reef-
Hawk Channel from Craig Key to west end of Seven Mile Bridge out
to the reef-
Hawk Channel from west end of Seven Mile Bridge to Halfmoon Shoal
out to the reef-
428 PM EDT Mon Apr 21 2025
...SMALL CRAFT SHOULD EXERCISE CAUTION FOR INCREASING WINDS...
.TONIGHT...East winds near 15 knots, increasing to 15 to 20 knots.
Seas 2 to 4 feet, occasionally to 5 feet. Nearshore waters a
moderate chop, becoming choppy.
.TUESDAY...East winds 15 to 20 knots, decreasing to near 15
knots. Seas 2 to 3 feet. Nearshore waters choppy, becoming a
moderate chop.
.TUESDAY NIGHT...East winds near 15 knots. Seas 2 to 3 feet.
Nearshore waters a moderate chop.
.WEDNESDAY...East winds near 15 knots. Seas 2 to 3 feet.
Nearshore waters a moderate chop.
.WEDNESDAY NIGHT...East winds 15 to 20 knots. Seas 2 to 3 feet.
Nearshore waters choppy.
.THURSDAY...East winds 15 to 20 knots. Seas 2 to 3 feet.
Nearshore waters choppy. Isolated showers.
.THURSDAY NIGHT...East winds near 20 knots. Seas 2 to 4 feet,
occasionally to 5 feet. Nearshore waters rough. Isolated showers.
.FRIDAY...East winds near 20 knots. Seas 2 to 4 feet,
occasionally to 5 feet. Nearshore waters rough. Isolated showers.
.FRIDAY NIGHT...East winds near 20 knots, decreasing to 15 to 20
knots. Seas 2 to 4 feet, occasionally to 5 feet. Nearshore waters
rough, becoming choppy. Isolated showers.
.SATURDAY...East winds near 15 knots. Seas 2 to 3 feet. Nearshore
waters a moderate chop. Isolated showers.
.SATURDAY NIGHT...East winds 10 to 15 knots. Seas 2 to 3 feet.
Nearshore waters a light to moderate chop. Isolated showers.
$$
GMZ052>055-072>075-220230-
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-
428 PM EDT Mon Apr 21 2025
...SMALL CRAFT SHOULD EXERCISE CAUTION...
.TONIGHT...East winds 15 to 20 knots. Seas 4 to 6 feet,
occasionally to 8 feet. Wave Detail: East 5 feet at 6 seconds.
.TUESDAY...East winds 15 to 20 knots. Seas 3 to 5 feet,
occasionally to 6 feet. Wave Detail: East to southeast 5 feet at 6
seconds.
.TUESDAY NIGHT...East winds 15 to 20 knots. Seas 3 to 5 feet,
occasionally to 6 feet. Wave Detail: East 4 feet at 5 seconds.
.WEDNESDAY...East winds near 15 knots. Seas 3 to 4 feet,
occasionally to 5 feet.
.WEDNESDAY NIGHT...Northeast to east winds 15 to 20 knots. Seas
3 to 5 feet, occasionally to 6 feet.
.THURSDAY...East winds 15 to 20 knots. Seas 4 to 5 feet,
occasionally to 6 feet. Isolated showers.
.THURSDAY NIGHT...East winds near 20 knots. Seas 4 to 6 feet,
occasionally to 8 feet. Scattered showers.
.FRIDAY...East winds near 20 knots. Seas 4 to 6 feet,
occasionally to 8 feet. Isolated showers.
.FRIDAY NIGHT...East winds near 20 knots, decreasing to 15 to 20
knots. Seas 4 to 6 feet, occasionally to 8 feet. Isolated
showers.
.SATURDAY...East winds near 15 knots. Seas 3 to 5 feet,
occasionally to 6 feet. Isolated showers.
.SATURDAY NIGHT...Northeast to east winds near 15 knots. Seas
3 to 5 feet, occasionally to 6 feet. Isolated showers.
$$
GMZ033-034-220230-
Gulf of America from East Cape Sable to Chokoloskee 20 to 60 NM
out and beyond 5 fathoms-
Gulf of America including Dry Tortugas and Rebecca Shoal Channel-
428 PM EDT Mon Apr 21 2025
...SMALL CRAFT SHOULD EXERCISE CAUTION FOR INCREASING WINDS...
.TONIGHT...East to southeast winds near 15 knots, increasing to 15
to 20 knots. Seas 2 to 4 feet, occasionally to 5 feet. Wave
Detail: East 3 feet at 4 seconds.
.TUESDAY...East to southeast winds 15 to 20 knots, decreasing to near
15 knots. Seas 2 to 3 feet. Wave Detail: East to southeast 3 feet
at 4 seconds.
.TUESDAY NIGHT...East winds 10 to 15 knots. Seas 2 to 3 feet.
Wave Detail: East 3 feet at 4 seconds.
.WEDNESDAY...East to southeast winds 10 to 15 knots. Seas 2 to
3 feet.
.WEDNESDAY NIGHT...East winds 10 to 15 knots. Seas 2 to 3 feet.
.THURSDAY...East winds near 15 knots, increasing to 15 to 20
knots. Seas 2 to 3 feet. Isolated showers.
.THURSDAY NIGHT...East winds near 20 knots. Seas 2 to 4 feet,
occasionally to 5 feet. Isolated showers.
.FRIDAY...East winds near 20 knots. Seas 2 to 4 feet,
occasionally to 5 feet. Isolated showers.
.FRIDAY NIGHT...East winds 15 to 20 knots. Seas 2 to 3 feet.
Isolated showers.
.SATURDAY...East winds near 15 knots. Seas 2 to 3 feet. Isolated
showers.
.SATURDAY NIGHT...East winds 10 to 15 knots. Seas 2 to 3 feet.
Isolated showers.
$$
AP/JAM
CWFKEY
Coastal Waters Forecast for the Florida Keys
National Weather Service Key West FL
428 PM EDT Mon Apr 21 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.
GMZ005-220230-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
428 PM EDT Mon Apr 21 2025
.SYNOPSIS...Even though the high has weakened slightly throughout
the day, expect this high to continue to meander for the next
several days north of The Bahamas leading to peaking winds at
night and lulling during the day. Another surge in northeast to
east breezes is possible Thursday into the weekend as the high
strengthens and drifts back westward.
The Approximate Shoreward Edge of the Gulf Stream as of April 16...
30 NM South of Dry Tortugas Light...on Loggerhead Key.
8 NM South of Cosgrove Shoal Light...off the Marquesas Keys.
5 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.
15 NM Southeast of Alligator Reef Light...off Islamorada.
14 NM Southeast of Molasses Reef Light...off Key Largo.
12 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.
$$
GMZ031-220230-
Florida Bay including Barnes Sound, Blackwater Sound, and
Buttonwood Sound-
428 PM EDT Mon Apr 21 2025
.TONIGHT...East winds near 15 knots. Bay waters a moderate chop.
.TUESDAY...East winds near 15 knots, decreasing to 10 to 15
knots. Bay waters a moderate chop, becoming a light to moderate
chop.
.TUESDAY NIGHT...East winds near 15 knots. Bay waters a moderate
chop.
.WEDNESDAY...East winds near 15 knots. Bay waters a moderate
chop.
.WEDNESDAY NIGHT...Northeast to east winds near 15 knots. Bay
waters a moderate chop.
.THURSDAY...East winds 15 to 20 knots. Bay waters choppy.
Isolated showers.
.THURSDAY NIGHT...Northeast to east winds 15 to 20 knots,
increasing to near 20 knots. Bay waters choppy, becoming rough.
Isolated showers.
.FRIDAY...East winds near 20 knots. Bay waters rough. Isolated
showers.
.FRIDAY NIGHT...Northeast to east winds 15 to 20 knots. Bay
waters choppy. Isolated showers.
.SATURDAY...East winds near 15 knots. Bay waters a moderate chop.
Isolated showers.
.SATURDAY NIGHT...Northeast to east winds 10 to 15 knots. Bay
waters a light to moderate chop. Isolated showers.
$$
GMZ032-035-220230-
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-
428 PM EDT Mon Apr 21 2025
...SMALL CRAFT SHOULD EXERCISE CAUTION FOR INCREASING WINDS...
.TONIGHT...East winds near 15 knots, increasing to 15 to 20 knots.
Seas 1 to 2 feet, except around 3 feet west of the Marquesas
Keys. Nearshore waters a moderate chop, becoming choppy.
.TUESDAY...East to southeast winds near 15 knots. Seas 1 to 2
feet, except 2 to 3 feet west of the Marquesas Keys. Nearshore
waters a moderate chop.
.TUESDAY NIGHT...East winds near 15 knots. Seas 1 to 2 feet.
Nearshore waters a moderate chop.
.WEDNESDAY...East winds near 15 knots. Seas 1 to 2 feet.
Nearshore waters a moderate chop.
.WEDNESDAY NIGHT...East winds 15 to 20 knots. Seas 1 to 2 feet.
Nearshore waters choppy.
.THURSDAY...East winds 15 to 20 knots. Seas 1 to 2 feet.
Nearshore waters choppy. Isolated showers.
.THURSDAY NIGHT...East winds near 20 knots. Seas 2 to 3 feet.
Nearshore waters rough. Isolated showers.
.FRIDAY...East winds near 20 knots. Seas 2 to 3 feet. Nearshore
waters rough. Isolated showers.
.FRIDAY NIGHT...East winds near 20 knots, decreasing to 15 to 20
knots. Seas 2 to 3 feet. Nearshore waters rough, becoming choppy.
Isolated showers.
.SATURDAY...East winds near 15 knots. Seas 1 to 3 feet. Nearshore
waters a moderate chop. Isolated showers.
.SATURDAY NIGHT...East winds 10 to 15 knots. Seas 1 to 2 feet.
Nearshore waters a light to moderate chop. Isolated showers.
$$
GMZ042>044-220230-
Hawk Channel from Ocean Reef to Craig Key out to the reef-
Hawk Channel from Craig Key to west end of Seven Mile Bridge out
to the reef-
Hawk Channel from west end of Seven Mile Bridge to Halfmoon Shoal
out to the reef-
428 PM EDT Mon Apr 21 2025
...SMALL CRAFT SHOULD EXERCISE CAUTION FOR INCREASING WINDS...
.TONIGHT...East winds near 15 knots, increasing to 15 to 20 knots.
Seas 2 to 4 feet, occasionally to 5 feet. Nearshore waters a
moderate chop, becoming choppy.
.TUESDAY...East winds 15 to 20 knots, decreasing to near 15
knots. Seas 2 to 3 feet. Nearshore waters choppy, becoming a
moderate chop.
.TUESDAY NIGHT...East winds near 15 knots. Seas 2 to 3 feet.
Nearshore waters a moderate chop.
.WEDNESDAY...East winds near 15 knots. Seas 2 to 3 feet.
Nearshore waters a moderate chop.
.WEDNESDAY NIGHT...East winds 15 to 20 knots. Seas 2 to 3 feet.
Nearshore waters choppy.
.THURSDAY...East winds 15 to 20 knots. Seas 2 to 3 feet.
Nearshore waters choppy. Isolated showers.
.THURSDAY NIGHT...East winds near 20 knots. Seas 2 to 4 feet,
occasionally to 5 feet. Nearshore waters rough. Isolated showers.
.FRIDAY...East winds near 20 knots. Seas 2 to 4 feet,
occasionally to 5 feet. Nearshore waters rough. Isolated showers.
.FRIDAY NIGHT...East winds near 20 knots, decreasing to 15 to 20
knots. Seas 2 to 4 feet, occasionally to 5 feet. Nearshore waters
rough, becoming choppy. Isolated showers.
.SATURDAY...East winds near 15 knots. Seas 2 to 3 feet. Nearshore
waters a moderate chop. Isolated showers.
.SATURDAY NIGHT...East winds 10 to 15 knots. Seas 2 to 3 feet.
Nearshore waters a light to moderate chop. Isolated showers.
$$
GMZ052>055-072>075-220230-
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-
428 PM EDT Mon Apr 21 2025
...SMALL CRAFT SHOULD EXERCISE CAUTION...
.TONIGHT...East winds 15 to 20 knots. Seas 4 to 6 feet,
occasionally to 8 feet. Wave Detail: East 5 feet at 6 seconds.
.TUESDAY...East winds 15 to 20 knots. Seas 3 to 5 feet,
occasionally to 6 feet. Wave Detail: East to southeast 5 feet at 6
seconds.
.TUESDAY NIGHT...East winds 15 to 20 knots. Seas 3 to 5 feet,
occasionally to 6 feet. Wave Detail: East 4 feet at 5 seconds.
.WEDNESDAY...East winds near 15 knots. Seas 3 to 4 feet,
occasionally to 5 feet.
.WEDNESDAY NIGHT...Northeast to east winds 15 to 20 knots. Seas
3 to 5 feet, occasionally to 6 feet.
.THURSDAY...East winds 15 to 20 knots. Seas 4 to 5 feet,
occasionally to 6 feet. Isolated showers.
.THURSDAY NIGHT...East winds near 20 knots. Seas 4 to 6 feet,
occasionally to 8 feet. Scattered showers.
.FRIDAY...East winds near 20 knots. Seas 4 to 6 feet,
occasionally to 8 feet. Isolated showers.
.FRIDAY NIGHT...East winds near 20 knots, decreasing to 15 to 20
knots. Seas 4 to 6 feet, occasionally to 8 feet. Isolated
showers.
.SATURDAY...East winds near 15 knots. Seas 3 to 5 feet,
occasionally to 6 feet. Isolated showers.
.SATURDAY NIGHT...Northeast to east winds near 15 knots. Seas
3 to 5 feet, occasionally to 6 feet. Isolated showers.
$$
GMZ033-034-220230-
Gulf of America from East Cape Sable to Chokoloskee 20 to 60 NM
out and beyond 5 fathoms-
Gulf of America including Dry Tortugas and Rebecca Shoal Channel-
428 PM EDT Mon Apr 21 2025
...SMALL CRAFT SHOULD EXERCISE CAUTION FOR INCREASING WINDS...
.TONIGHT...East to southeast winds near 15 knots, increasing to 15
to 20 knots. Seas 2 to 4 feet, occasionally to 5 feet. Wave
Detail: East 3 feet at 4 seconds.
.TUESDAY...East to southeast winds 15 to 20 knots, decreasing to near
15 knots. Seas 2 to 3 feet. Wave Detail: East to southeast 3 feet
at 4 seconds.
.TUESDAY NIGHT...East winds 10 to 15 knots. Seas 2 to 3 feet.
Wave Detail: East 3 feet at 4 seconds.
.WEDNESDAY...East to southeast winds 10 to 15 knots. Seas 2 to
3 feet.
.WEDNESDAY NIGHT...East winds 10 to 15 knots. Seas 2 to 3 feet.
.THURSDAY...East winds near 15 knots, increasing to 15 to 20
knots. Seas 2 to 3 feet. Isolated showers.
.THURSDAY NIGHT...East winds near 20 knots. Seas 2 to 4 feet,
occasionally to 5 feet. Isolated showers.
.FRIDAY...East winds near 20 knots. Seas 2 to 4 feet,
occasionally to 5 feet. Isolated showers.
.FRIDAY NIGHT...East winds 15 to 20 knots. Seas 2 to 3 feet.
Isolated showers.
.SATURDAY...East winds near 15 knots. Seas 2 to 3 feet. Isolated
showers.
.SATURDAY NIGHT...East winds 10 to 15 knots. Seas 2 to 3 feet.
Isolated showers.
$$
AP/JAM