Your Ultimate Boating Resource

HomeForecastsFlorida ForecastsContent Keys, FL - Content Passage Coastal Forecast

Content Keys, FL - Content Passage Coastal Forecast

FZUS52 KKEY 250817
CWFKEY

Coastal Waters Forecast for the Florida Keys
National Weather Service Key West FL
417 AM EDT Sat Jul 25 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.

The Wave Detail section highlights the period and direction of
origin for the highest-energy waves, as well as any long-period
swells moving in a different direction than the wind.

GMZ005-252030-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
417 AM EDT Sat Jul 25 2026

.SYNOPSIS...A col will develop across the region today, leading
to a brief period of light and variable winds through this evening.
Thereafter, breezes will freshen to gentle breezes and back to
the west to northwest as a surface trough develops Sunday. Breezes
will return from the southwest and west as the trough moves east
of the Florida Peninsula early next week. There is growing
confidence of a return to an active weather pattern starting
Sunday night.

The Approximate Shoreward Edge of the Gulf Stream as of July 17,
2026...

49 NM South of Dry Tortugas Light...on Loggerhead Key.
51 NM South of Cosgrove Shoal Light...off the Marquesas Keys.
38 NM South of Sand Key Light...off Key West.
22 NM South of Looe Key...off Big Pine Key.
13 NM South 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, using data from RTOFS and NASA SPoRT SST.

$$

GMZ031-252030-
Florida Bay including Barnes Sound, Blackwater Sound, and
Buttonwood Sound-
417 AM EDT Sat Jul 25 2026

.TODAY...East to southeast winds 5 to 10 knots early, becoming
southeast to south near 5 knots. Bay waters smooth to a light
chop, becoming smooth. A chance of showers with a slight chance of
thunderstorms.
.TONIGHT...Southeast to south winds near 5 knots, becoming
southwest. Bay waters smooth. A chance of showers with a slight
chance of thunderstorms.
.SUNDAY...Southwest to west winds near 5 knots, becoming west to
northwest 5 to 10 knots in the afternoon. Bay waters smooth,
becoming smooth to a light chop. A chance of showers and
thunderstorms.
.SUNDAY NIGHT...West to northwest winds 5 to 10 knots. Bay waters
smooth to a light chop. Showers likely with a chance of
thunderstorms.
.MONDAY...West to northwest winds 5 to 10 knots, becoming
southwest to west near 10 knots. Bay waters smooth to a light chop,
becoming a light chop. Showers likely with a chance of
thunderstorms.
.MONDAY NIGHT...Southwest to west winds near 10 knots. Bay waters
a light chop. Showers likely with a chance of thunderstorms.
.TUESDAY...Southwest to west winds near 10 knots, increasing to 10
to 15 knots. Bay waters a light chop, becoming a light to moderate.
Showers likely with a chance of thunderstorms.
.TUESDAY NIGHT...Southwest winds 10 to 15 knots. Bay waters a
light to moderate chop. A slight chance of showers and
thunderstorms.
.WEDNESDAY...Southwest winds 10 to 15 knots. Bay waters a light
to moderate chop. A slight chance of showers.
.WEDNESDAY NIGHT...Southwest to west winds near 10 knots. Bay
waters a light chop.

$$

GMZ032-035-252030-
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-
417 AM EDT Sat Jul 25 2026

.TODAY...East to southeast winds 5 to 10 knots early, becoming
variable near 5 knots. Seas around 1 foot, subsiding to 1 foot or
less. Nearshore waters smooth to a light chop, becoming smooth. A
chance of showers and a slight chance of thunderstorms, mainly in
the morning.
.TONIGHT...Variable winds near 5 knots, becoming southwest to west.
Seas 1 foot or less. Nearshore waters smooth. A chance of showers
with a slight chance of thunderstorms.
.SUNDAY...Southwest to west winds near 5 knots, becoming west to
northwest 5 to 10 knots. Seas 1 foot or less, building to around 1
foot. Nearshore waters smooth, becoming smooth to a light chop. A
chance of showers and thunderstorms.
.SUNDAY NIGHT...West to northwest winds 5 to 10 knots. Seas
around 1 foot. Nearshore waters smooth to a light chop. Showers
likely with a chance of thunderstorms.
.MONDAY...West to northwest winds 5 to 10 knots, increasing to
near 10 knots. Seas around 1 foot. Nearshore waters smooth to a
light chop, becoming a light chop. A chance of showers and
thunderstorms.
.MONDAY NIGHT...West to northwest winds near 10 knots, becoming
southwest to west. Seas around 1 foot. Nearshore waters a light
chop. Showers likely with a chance of thunderstorms.
.TUESDAY...Southwest to west winds near 10 knots. Seas 1 to
2 feet. Nearshore waters a light chop. Showers likely with a
chance of thunderstorms.
.TUESDAY NIGHT...Southwest to west winds near 10 knots, increasing
to 10 to 15 knots. Seas 1 to 2 feet. Nearshore waters a light
chop, becoming a light to moderate chop. A slight chance of
showers and thunderstorms.
.WEDNESDAY...Southwest to west winds 10 to 15 knots. Seas 1 to
2 feet. Nearshore waters a light to moderate chop. A slight
chance of showers.
.WEDNESDAY NIGHT...Southwest to west winds near 10 knots. Seas 1
to 2 feet. Nearshore waters smooth to a light chop.

$$

GMZ042>044-252030-
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-
417 AM EDT Sat Jul 25 2026

.TODAY...East to southeast winds 5 to 10 knots, becoming variable
near 5 knots. Seas 1 to 2 feet, subsiding to around 1 foot.
Nearshore waters smooth to a light chop, becoming smooth. A slight
chance of showers and thunderstorms.
.TONIGHT...Variable winds near 5 knots, becoming southwest . Seas
around 1 foot. Nearshore waters smooth. A chance of showers with
a slight chance of thunderstorms.
.SUNDAY...Southwest to west winds near 5 knots, becoming west to
northwest 5 to 10 knots in the afternoon. Seas around 1 foot.
Nearshore waters smooth, becoming a light chop. A chance of
showers and thunderstorms.
.SUNDAY NIGHT...West to northwest winds 5 to 10 knots. Seas
around 1 foot. Nearshore waters smooth to a light chop. Showers
likely with a chance of thunderstorms.
.MONDAY...West to northwest winds 5 to 10 knots, increasing to
near 10 knots. Seas around 1 foot. Nearshore waters smooth to a
light chop, becoming a light chop. A chance of showers and
thunderstorms.
.MONDAY NIGHT...West to northwest winds near 10 knots, becoming
southwest to west. Seas around 1 foot. Nearshore waters a light
chop. A chance of showers and thunderstorms.
.TUESDAY...Southwest to west winds 10 to 15 knots. Seas 1 to
2 feet. Nearshore waters a light to moderate chop. A chance of
showers and thunderstorms.
.TUESDAY NIGHT...Southwest 10 to 15 knots. Seas 1 to 2 feet,
building to around 2 feet. Nearshore waters a light to moderate
chop. A slight chance of showers and thunderstorms.
.WEDNESDAY...Southwest winds 10 to 15 knots. Seas around 2 feet.
Nearshore waters a light to moderate chop. A slight chance of
showers.
.WEDNESDAY NIGHT...Southwest winds near 10 knots. Seas 1 to 2
feet. Nearshore waters smooth to a light chop.

$$

GMZ052>055-072>075-252030-
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-
417 AM EDT Sat Jul 25 2026

.TODAY...Southeast winds near 10 knots early, becoming variable
5 to 10 knots. Seas around 2 feet, subsiding to 1 to 2 feet. Wave
Detail: East to southeast 2 feet at 4 seconds and west 1 foot at
7 seconds. A slight chance of showers and thunderstorms.
.TONIGHT...Variable winds 5 to 10 knots. Seas around 1 foot. Wave
Detail: East 1 foot at 4 seconds and west 1 foot at 6 seconds. A
slight chance of showers and thunderstorms.
.SUNDAY...Southwest to west winds 5 to 10 knots, becoming west to
northwest. Seas around 1 foot. Wave Detail: East 1 foot at 3
seconds. A chance of showers and thunderstorms.
.SUNDAY NIGHT...West to northwest winds 5 to 10 knots. Seas
around 1 foot. A chance of showers and thunderstorms.
.MONDAY...West to northwest winds 5 to 10 knots, increasing to
near 10 knots. Seas around 1 foot. A chance of showers and
thunderstorms.
.MONDAY NIGHT...West to northwest winds near 10 knots, becoming
southwest to west. Seas around 1 foot. A chance of showers and
thunderstorms.
.TUESDAY...Southwest to west winds 10 to 15 knots. Seas 1 to 2
feet. A chance of showers and thunderstorms.
.TUESDAY NIGHT...Southwest winds 10 to 15 knots. Seas 1 to 2
feet. A slight chance of showers and thunderstorms.
.WEDNESDAY...Southwest winds 10 to 15 knots, becoming west to
northwest 5 to 10 knots in the afternoon. Seas 1 to 2 feet. A
slight chance of showers.
.WEDNESDAY NIGHT...West to northwest winds 5 to 10 knots,
becoming south to southwest near 10 knots. Seas around 1 foot.

$$

GMZ033-034-252030-
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-
417 AM EDT Sat Jul 25 2026

.TODAY...East to southeast winds 5 to 10 knots, becoming
northwest near 5 knots. Seas around 1 foot. Wave Detail: East to
southeast 1 foot at 3 seconds and west to northwest 1 foot at 6
seconds. A slight chance of showers and thunderstorms.
.TONIGHT...Northwest winds 5 to 10 knots. Seas around 1 foot.
Wave Detail: Northwest to north 1 foot at 3 seconds and west 1
foot at 6 seconds. A slight chance of showers and thunderstorms.
.SUNDAY...Northwest winds 5 to 10 knots, increasing to near 10
knots. Seas around 1 foot. Wave Detail: Northwest 1 foot at 3
seconds and west 1 foot at 6 seconds. A chance of showers and
thunderstorms.
.SUNDAY NIGHT...Northwest winds near 10 knots. Seas around 1
foot. A chance of showers and thunderstorms.
.MONDAY...West to northwest winds near 10 knots. Seas around 1
foot. Showers likely with a chance of thunderstorms.
.MONDAY NIGHT...West to northwest winds near 10 knots, becoming
southwest to west. Seas 1 to 2 feet. A chance of showers and
thunderstorms.
.TUESDAY...Southwest to west winds near 10 knots. Seas 1 to
2 feet. A chance of showers and thunderstorms.
.TUESDAY NIGHT...Southwest to west winds near 10 knots. Seas 1 to
2 feet. A slight chance of showers and thunderstorms.
.WEDNESDAY...Southwest to west winds 10 to 15 knots. Seas around
2 feet. A slight chance of showers.
.WEDNESDAY NIGHT...Southwest to west winds near 10 knots. Seas 1
to 2 feet. A slight chance of showers.

$$


Don't Miss

Add us on Google to stay connected!
Add Us on Google