939
FZUS52 KKEY 311423
CWFKEY

Coastal Waters Forecast for the Florida Keys
National Weather Service Key West FL
1023 AM EDT Sun May 31 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.

GMZ005-010230-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
1023 AM EDT Sun May 31 2026

.SYNOPSIS...Weak high pressure across the area will support light
to gentle southwesterly breezes over the next few days, becoming
light and variable at times. Near normal rain and thunder chances
also expected. A weak frontal boundary may stall near the Keys
coastal waters by mid week, supporting an uptick in wind speeds as
well as rain chances.

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...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.

$$

GMZ031-010230-
Florida Bay including Barnes Sound, Blackwater Sound, and
Buttonwood Sound-
1023 AM EDT Sun May 31 2026

.THIS AFTERNOON...Southwest to west winds near 5 knots. Bay
waters smooth. A chance of showers with a slight chance of
thunderstorms.
.TONIGHT...Southwest to west winds near 5 knots. Bay waters
smooth. A slight chance of showers and thunderstorms.
.MONDAY...Southwest to west winds 5 to 10 knots. Bay waters
smooth to a light chop. A slight chance of showers and
thunderstorms.
.MONDAY NIGHT...West to northwest winds 5 to 10 knots. Bay waters
smooth to a light chop.
.TUESDAY...West winds near 5 knots. Bay waters smooth. A slight
chance of showers and thunderstorms.
.TUESDAY NIGHT...West to northwest winds 5 to 10 knots, becoming
northwest after midnight. Bay waters smooth to a light chop,
becoming smooth. A slight chance of showers and thunderstorms.
.WEDNESDAY...Northwest winds near 5 knots, becoming variable. Bay
waters smooth. Showers likely with a chance of thunderstorms.
.WEDNESDAY NIGHT...Northeast winds 5 to 10 knots, increasing to
near 10 knots. Bay waters smooth to a light chop, becoming a light
chop. Showers likely with a chance of thunderstorms.
.THURSDAY AND THURSDAY NIGHT...Northeast to east winds 10 to 15
knots. Bay waters a light to moderate chop. Showers likely with a
chance of thunderstorms.

$$

GMZ032-035-010230-
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-
1023 AM EDT Sun May 31 2026

.THIS AFTERNOON...Southwest to west winds near 5 knots. Seas 1
foot or less. Nearshore waters smooth. A chance of showers with
a slight chance of thunderstorms.
.TONIGHT...Southwest to west winds near 5 knots. Seas 1 foot or
less. Nearshore waters smooth. A slight chance of showers and
thunderstorms.
.MONDAY...West winds near 5 knots. Seas 1 foot or less. Nearshore
waters smooth. A slight chance of showers and thunderstorms.
.MONDAY NIGHT...West to northwest winds near 5 knots. Seas 1 foot
or less, then 1 foot or less after midnight. Nearshore waters
smooth.
.TUESDAY...Northwest winds near 5 knots. Seas 1 foot or less.
Nearshore waters smooth. A slight chance of showers and
thunderstorms.
.TUESDAY NIGHT...Northwest to north winds 5 to 10 knots, becoming
north. Seas 1 foot or less. Nearshore waters smooth to a light
chop. A slight chance of showers and thunderstorms.
.WEDNESDAY...North to northeast winds near 5 knots. Seas 1 foot
or less. Nearshore waters smooth. A chance of showers and
thunderstorms.
.WEDNESDAY NIGHT...Northeast to east winds 5 to 10 knots,
increasing to near 10 knots. Seas 1 foot or less, building to
around 1 foot. Nearshore waters smooth to a light chop, becoming a
light chop. Showers likely with a chance of thunderstorms.
.THURSDAY...Northeast to east winds near 10 knots, increasing to
10 to 15 knots. Seas around 1 foot, building to 1 to 2 feet.
Nearshore waters a light chop, becoming a light to moderate chop.
A chance of thunderstorms. Showers likely.
.THURSDAY NIGHT...Northeast to east winds 10 to 15 knots. Seas
1 to 2 feet. Nearshore waters a light to moderate chop. A chance
of showers and thunderstorms.

$$

GMZ042>044-010230-
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-
1023 AM EDT Sun May 31 2026

.THIS AFTERNOON...Southwest winds near 5 knots. Seas 1 foot or
less. Nearshore waters smooth. A slight chance of showers and
thunderstorms.
.TONIGHT...Southwest to west winds near 5 knots, becoming
variable at times. Seas 1 foot or less. Nearshore waters smooth. A
slight chance of showers and thunderstorms.
.MONDAY...Southwest to west winds near 5 knots. Seas 1 foot or
less. Nearshore waters smooth. A slight chance of showers and
thunderstorms.
.MONDAY NIGHT...West to northwest winds near 5 knots, becoming
southwest to west. Seas 1 foot or less. Nearshore waters smooth.
.TUESDAY...Northwest winds near 5 knots. Seas 1 foot or less.
Nearshore waters smooth. A slight chance of showers and
thunderstorms.
.TUESDAY NIGHT...Northwest to north winds 5 to 10 knots, becoming
north. Seas 1 foot or less. Nearshore waters smooth to a light
chop, becoming smooth. A slight chance of showers and
thunderstorms.
.WEDNESDAY...North to northeast winds near 5 knots. Seas 1 foot
or less. Nearshore waters smooth. A chance of showers and
thunderstorms.
.WEDNESDAY NIGHT...Northeast to east winds 5 to 10 knots,
increasing to near 10 knots. Seas 1 foot or less, building to
around 1 foot. Nearshore waters smooth to a light chop, becoming
a light chop. Showers likely with a chance of thunderstorms.
.THURSDAY...Northeast to east winds near 10 knots, increasing to 10
to 15 knots. Seas around 1 foot, building to 1 to 2 feet.
Nearshore waters a light chop, becoming a light to moderate chop.
Showers likely with a chance of thunderstorms.
.THURSDAY NIGHT...Northeast to east winds 10 to 15 knots. Seas
building to 2 to 3 feet. Nearshore waters a light to moderate
chop. Showers likely with a chance of thunderstorms.

$$

GMZ052>055-072>075-010230-
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-
1023 AM EDT Sun May 31 2026

.THIS AFTERNOON...South to southwest winds near 5 knots. Seas 1
foot or less. Wave Detail:
Southeast 1 foot at 3 seconds. A slight chance of showers and
thunderstorms.
.TONIGHT...South winds near 5 knots, becoming variable at times.
Seas 1 foot or less. A slight chance of showers and thunderstorms.
.MONDAY...Variable winds near 5 knots. Seas 1 foot or less. A
slight chance of showers and thunderstorms.
.MONDAY NIGHT...Variable winds near 5 knots, becoming north to
northeast. Seas 1 foot or less. A slight chance of showers and
thunderstorms.
.TUESDAY...North to northeast winds near 5 knots. Seas 1 foot or
less. A slight chance of showers and thunderstorms.
.TUESDAY NIGHT...North to northeast winds 5 to 10 knots, becoming
northeast to east. Seas around 1 foot. A chance of showers with a
slight chance of thunderstorms.
.WEDNESDAY...Northeast to east winds near 5 knots. Seas around
1 foot. A chance of showers and thunderstorms.
.WEDNESDAY NIGHT...Northeast to east winds 5 to 10 knots,
increasing to near 10 knots. Seas around 1 foot, building to 1 to
2 feet due to a northeasterly swell. Showers likely with a chance
of thunderstorms.
.THURSDAY...Northeast to east winds near 10 knots, increasing to
10 to 15 knots. Seas building to 2 to 3 feet due to a
northeasterly swell. Showers likely with a chance of
thunderstorms.
.THURSDAY NIGHT...East winds 10 to 15 knots. Seas building to 2
to 4 feet, occasionally to 5 feet due to a northeasterly swell. A
chance of showers with a slight chance of thunderstorms.

$$

GMZ033-034-010230-
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-
1023 AM EDT Sun May 31 2026

.THIS AFTERNOON...Southwest winds near 5 knots. Seas 1 foot or
less. Wave Detail: South 1 foot at 4 seconds. A slight chance of
showers and thunderstorms.
.TONIGHT...Southwest to west winds near 5 knots. Seas 1 foot or
less. A slight chance of showers and thunderstorms.
.MONDAY...Southwest to west winds near 5 knots, becoming west.
Seas 1 foot or less. Wave Detail: Southwest 1 foot at 4 seconds. A
slight chance of showers and thunderstorms.
.MONDAY NIGHT...Northwest to north winds near 5 knots, becoming
variable at times. Seas 1 foot or less.
.TUESDAY...Northwest to north winds near 5 knots. Seas around
1 foot. A slight chance of showers and thunderstorms.
.TUESDAY NIGHT...Northwest to north winds 5 to 10 knots, becoming
north. Seas around 1 foot. A slight chance of showers and
thunderstorms.
.WEDNESDAY...North to northeast winds near 5 knots. Seas around
1 foot. A chance of showers and thunderstorms.
.WEDNESDAY NIGHT...Northeast to east winds 5 to 10 knots,
increasing to near 10 knots. Seas around 1 foot. Showers likely
with a chance of thunderstorms.
.THURSDAY...East winds near 10 knots, increasing to 10 to 15 knots.
Seas 1 to 2 feet, building to around 2 feet. A chance of
thunderstorms. Showers likely.
.THURSDAY NIGHT...East winds 10 to 15 knots. Seas 2 to 3 feet. A
chance of showers and thunderstorms.

$$