959
FZUS52 KKEY 161421
CWFKEY
COASTAL WATERS FORECAST FOR THE FLORIDA KEYS
NATIONAL WEATHER SERVICE KEY WEST FL
1021 AM EDT TUE SEP 16 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.
GMZ005-170230-
SYNOPSIS FOR KEYS COASTAL WATERS FROM OCEAN REEF TO DRY TORTUGAS
1021 AM EDT TUE SEP 16 2025
SYNOPSIS
A VERY STUBBORN, WEAK FRONTAL BOUNDARY IN THE VICINITY OF THE
FLORIDA KEYS WILL DRAG CLOSER TO SOUTHERN FLORIDA OVER THE NEXT
FEW DAYS. THE RESULTING INCREASE IN MOISTURE WILL LEAD TO SHOWERS
AND THUNDERSTORMS WITH THE MOST ACTIVITY EXPECTED SOME TIME OVER
WEDNESDAY AND THURSDAY. FRESHENING NORTHEASTERLY TO EASTERLY
BREEZES WILL PEAK WEDNESDAY NIGHT, AND SMALL CRAFT SHOULD EXERCISE
CAUTION HEADLINES MAY BE NEEDED, ESPECIALLY ACROSS THE WATERS TO
THE SOUTH OF THE ISLAND CHAIN. BREEZES SHOULD SLACKEN AND WEATHER
CONDITIONS SHOULD DRY OUT TO SOME DEGREE AS WE HEAD INTO THE
WEEKEND.
THE APPROXIMATE SHOREWARD EDGE OF THE GULF STREAM AS OF SEPTEMBER
16...
53 NM SOUTH OF DRY TORTUGAS LIGHT...ON LOGGERHEAD KEY.
40 NM SOUTH OF COSGROVE SHOAL LIGHT...OFF THE MARQUESAS KEYS.
32 NM SOUTH OF SAND KEY LIGHT...OFF KEY WEST.
15 NM SOUTH OF LOOE KEY...OFF BIG PINE KEY.
17 NM SOUTHEAST OF SOMBRERO KEY LIGHT...OFF MARATHON.
14 NM SOUTHEAST OF ALLIGATOR REEF LIGHT...OFF ISLAMORADA.
13 NM SOUTHEAST OF MOLASSES REEF LIGHT...OFF KEY LARGO.
9 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.
GMZ031-170230-
FLORIDA BAY INCLUDING BARNES SOUND, BLACKWATER SOUND, AND
BUTTONWOOD SOUND-
1021 AM EDT TUE SEP 16 2025
THIS AFTERNOON
EAST TO SOUTHEAST WINDS 5 TO 10 KNOTS, BECOMING
NORTHEAST TO EAST. BAY WATERS SMOOTH TO A LIGHT CHOP. SCATTERED
SHOWERS AND ISOLATED THUNDERSTORMS.
TONIGHT
NORTHEAST TO EAST WINDS NEAR 10 KNOTS. BAY WATERS A
LIGHT CHOP. NUMEROUS SHOWERS AND SCATTERED THUNDERSTORMS.
WEDNESDAY
NORTHEAST TO EAST WINDS NEAR 10 KNOTS, INCREASING TO
10 TO 15 KNOTS. BAY WATERS A LIGHT CHOP, BECOMING A LIGHT TO
MODERATE CHOP. NUMEROUS SHOWERS AND SCATTERED THUNDERSTORMS.
WEDNESDAY NIGHT
NORTHEAST TO EAST WINDS 10 TO 15 KNOTS,
INCREASING TO NEAR 15 KNOTS. BAY WATERS A LIGHT TO MODERATE CHOP,
BECOMING A MODERATE CHOP. NUMEROUS SHOWERS AND SCATTERED
THUNDERSTORMS.
THURSDAY
NORTHEAST TO EAST WINDS DECREASING TO NEAR 10 KNOTS.
BAY WATERS BECOMING A LIGHT CHOP. WIDESPREAD SHOWERS AND
SCATTERED THUNDERSTORMS.
THURSDAY NIGHT
NORTHEAST TO EAST WINDS 5 TO 10 KNOTS. BAY
WATERS SMOOTH TO A LIGHT CHOP. NUMEROUS SHOWERS AND SCATTERED
THUNDERSTORMS.
FRIDAY
NORTHEAST WINDS NEAR 5 KNOTS. BAY WATERS SMOOTH.
NUMEROUS SHOWERS AND SCATTERED THUNDERSTORMS.
FRIDAY NIGHT THROUGH SATURDAY NIGHT
NORTHEAST WINDS 5 TO 10
KNOTS. BAY WATERS SMOOTH TO A LIGHT CHOP. SCATTERED SHOWERS AND
THUNDERSTORMS.
GMZ032-035-170230-
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-
1021 AM EDT TUE SEP 16 2025
THIS AFTERNOON
EAST TO SOUTHEAST WINDS 5 TO 10 KNOTS, BECOMING
NORTHEAST TO EAST. SEAS 1 FOOT OR LESS, BUILDING TO AROUND 1
FOOT. NEARSHORE WATERS SMOOTH TO A LIGHT CHOP. SCATTERED SHOWERS
AND ISOLATED THUNDERSTORMS.
TONIGHT
NORTHEAST TO EAST WINDS NEAR 10 KNOTS. SEAS AROUND 1
FOOT. NEARSHORE WATERS A LIGHT CHOP. NUMEROUS SHOWERS AND
SCATTERED THUNDERSTORMS.
WEDNESDAY
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.
NUMEROUS SHOWERS AND SCATTERED THUNDERSTORMS.
WEDNESDAY NIGHT
NORTHEAST TO EAST WINDS 10 TO 15 KNOTS,
INCREASING TO NEAR 15 KNOTS. SEAS 1 TO 2 FEET, EXCEPT AROUND 3
FEET WEST OF THE MARQUESAS KEYS. NEARSHORE WATERS A LIGHT TO
MODERATE CHOP, BECOMING A MODERATE CHOP. NUMEROUS SHOWERS AND
SCATTERED THUNDERSTORMS.
THURSDAY
NORTHEAST TO EAST WINDS DECREASING TO 10 TO 15 KNOTS.
SEAS SUBSIDING TO 1 TO 2 FEET. NEARSHORE WATERS BECOMING A LIGHT
TO MODERATE CHOP. WIDESPREAD SHOWERS AND SCATTERED THUNDERSTORMS.
THURSDAY NIGHT
NORTHEAST TO EAST WINDS 10 TO 15 KNOTS,
DECREASING TO NEAR 10 KNOTS. SEAS 1 TO 2 FEET. NEARSHORE WATERS A
LIGHT TO MODERATE CHOP, BECOMING A LIGHT CHOP. NUMEROUS SHOWERS
AND SCATTERED THUNDERSTORMS.
FRIDAY
NORTHEAST WINDS DECREASING TO 5 TO 10 KNOTS. SEAS
SUBSIDING TO AROUND 1 FOOT. NEARSHORE WATERS BECOMING SMOOTH TO A
LIGHT CHOP. NUMEROUS SHOWERS AND SCATTERED THUNDERSTORMS.
FRIDAY NIGHT THROUGH SATURDAY NIGHT
NORTHEAST WINDS 5 TO 10
KNOTS. SEAS 1 FOOT OR LESS. NEARSHORE WATERS SMOOTH TO A LIGHT
CHOP. SCATTERED SHOWERS AND THUNDERSTORMS.
GMZ042>044-170230-
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-
1021 AM EDT TUE SEP 16 2025
THIS AFTERNOON
NORTHEAST TO EAST WINDS 5 TO 10 KNOTS,
INCREASING TO NEAR 10 KNOTS. SEAS AROUND 1 FOOT, BUILDING TO 1 TO
2 FEET. NEARSHORE WATERS SMOOTH TO A LIGHT CHOP, BECOMING A LIGHT
CHOP. SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS.
TONIGHT
NORTHEAST TO EAST WINDS NEAR 10 KNOTS. SEAS 1 TO 2
FEET. NEARSHORE WATERS A LIGHT CHOP. NUMEROUS SHOWERS AND
SCATTERED THUNDERSTORMS.
WEDNESDAY
NORTHEAST TO EAST WINDS NEAR 10 KNOTS, INCREASING TO 10
TO 15 KNOTS. SEAS 1 TO 2 FEET, BUILDING TO AROUND 2 FEET.
NEARSHORE WATERS A LIGHT CHOP, BECOMING A LIGHT TO MODERATE CHOP.
NUMEROUS SHOWERS AND SCATTERED THUNDERSTORMS.
WEDNESDAY NIGHT
NORTHEAST TO EAST WINDS NEAR 15 KNOTS,
INCREASING TO 15 TO 20 KNOTS. SEAS AROUND 2 FEET, BUILDING TO 2
TO 3 FEET. NEARSHORE WATERS A MODERATE CHOP, BECOMING CHOPPY.
NUMEROUS SHOWERS AND SCATTERED THUNDERSTORMS.
THURSDAY
NORTHEAST TO EAST WINDS NEAR 15 KNOTS, 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.
WIDESPREAD SHOWERS AND SCATTERED THUNDERSTORMS.
THURSDAY NIGHT
NORTHEAST TO EAST WINDS NEAR 10 KNOTS,
DECREASING TO 5 TO 10 KNOTS. SEAS SUBSIDING TO 1 TO 2 FEET.
NEARSHORE WATERS A LIGHT CHOP, BECOMING SMOOTH TO A LIGHT CHOP.
NUMEROUS SHOWERS AND SCATTERED THUNDERSTORMS.
FRIDAY
NORTHEAST WINDS 5 TO 10 KNOTS. SEAS SUBSIDING TO AROUND
1 FOOT. NEARSHORE WATERS SMOOTH TO A LIGHT CHOP. NUMEROUS SHOWERS
AND SCATTERED THUNDERSTORMS.
FRIDAY NIGHT THROUGH SATURDAY NIGHT
NORTHEAST WINDS 5 TO 10
KNOTS. SEAS AROUND 1 FOOT. NEARSHORE WATERS SMOOTH TO A LIGHT
CHOP. SCATTERED SHOWERS AND THUNDERSTORMS.
GMZ052>055-072>075-170230-
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-
1021 AM EDT TUE SEP 16 2025
THIS AFTERNOON
NORTHEAST TO EAST WINDS 5 TO 10 KNOTS,
INCREASING TO NEAR 10 KNOTS. SEAS 1 TO 2 FEET, BUILDING TO 2 TO 3
FEET. WAVE DETAIL:
NORTHEAST TO EAST 3 FEET AT 4 SECONDS. SCATTERED SHOWERS AND
ISOLATED THUNDERSTORMS.
TONIGHT
NORTHEAST TO EAST WINDS NEAR 10 KNOTS, INCREASING TO 10
TO 15 KNOTS. SEAS 2 TO 3 FEET. WAVE DETAIL: NORTHEAST TO EAST 3
FEET AT 5 SECONDS. NUMEROUS SHOWERS AND SCATTERED THUNDERSTORMS.
WEDNESDAY
NORTHEAST TO EAST WINDS INCREASING TO NEAR 15 KNOTS.
SEAS BUILDING TO 2 TO 4 FEET, OCCASIONALLY TO 5 FEET. WAVE
DETAIL: NORTHEAST TO EAST 4 FEET AT 5 SECONDS. NUMEROUS SHOWERS
AND SCATTERED THUNDERSTORMS.
WEDNESDAY NIGHT
NORTHEAST TO EAST WINDS INCREASING TO 15 TO 20
KNOTS. SEAS BUILDING TO 3 TO 5 FEET, OCCASIONALLY TO 6 FEET.
NUMEROUS SHOWERS AND SCATTERED THUNDERSTORMS.
THURSDAY
NORTHEAST TO EAST WINDS DECREASING TO 10 TO 15 KNOTS.
SEAS SUBSIDING TO 2 TO 4 FEET, OCCASIONALLY TO 5 FEET. NUMEROUS
SHOWERS AND SCATTERED THUNDERSTORMS.
THURSDAY NIGHT
EAST WINDS 10 TO 15 KNOTS, DECREASING TO NEAR 10
KNOTS. SEAS SUBSIDING TO 2 TO 3 FEET. NUMEROUS SHOWERS AND
SCATTERED THUNDERSTORMS.
FRIDAY
NORTHEAST WINDS DECREASING TO 5 TO 10 KNOTS. SEAS
SUBSIDING TO 1 TO 2 FEET. NUMEROUS SHOWERS AND SCATTERED
THUNDERSTORMS.
FRIDAY NIGHT THROUGH SATURDAY NIGHT
NORTHEAST WINDS 5 TO 10
KNOTS. SEAS AROUND 1 FOOT. SCATTERED SHOWERS AND THUNDERSTORMS.
GMZ033-034-170230-
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-
1021 AM EDT TUE SEP 16 2025
THIS AFTERNOON
NORTHEAST TO EAST WINDS 5 TO 10 KNOTS. SEAS
AROUND 1 FOOT. WAVE DETAIL: NORTHEAST TO EAST 1 FOOT AT 3 SECONDS.
SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS.
TONIGHT
NORTHEAST TO EAST WINDS 5 TO 10 KNOTS, INCREASING TO
NEAR 10 KNOTS. SEAS AROUND 1 FOOT, BUILDING TO 1 TO 2 FEET. WAVE
DETAIL: EAST 2 FEET AT 3 SECONDS. NUMEROUS SHOWERS AND SCATTERED
THUNDERSTORMS.
WEDNESDAY
NORTHEAST TO EAST WINDS INCREASING TO NEAR 15 KNOTS.
SEAS BUILDING TO 2 TO 3 FEET. WAVE DETAIL: NORTHEAST TO EAST 3
FEET AT 4 SECONDS. NUMEROUS SHOWERS AND SCATTERED THUNDERSTORMS.
WEDNESDAY NIGHT
NORTHEAST TO EAST WINDS NEAR 15 KNOTS,
INCREASING TO 15 TO 20 KNOTS. SEAS 2 TO 3 FEET, BUILDING TO AROUND
3 FEET. WIDESPREAD SHOWERS AND SCATTERED THUNDERSTORMS.
THURSDAY
NORTHEAST TO EAST WINDS DECREASING TO 10 TO 15 KNOTS.
SEAS SUBSIDING TO 2 TO 3 FEET. WIDESPREAD SHOWERS AND SCATTERED
THUNDERSTORMS.
THURSDAY NIGHT
NORTHEAST TO EAST WINDS 10 TO 15 KNOTS. SEAS
1 TO 2 FEET. NUMEROUS SHOWERS AND SCATTERED THUNDERSTORMS.
FRIDAY
NORTHEAST WINDS DECREASING TO NEAR 10 KNOTS. SEAS 1 TO
2 FEET. NUMEROUS SHOWERS AND SCATTERED THUNDERSTORMS.
FRIDAY NIGHT THROUGH SATURDAY NIGHT
NORTHEAST WINDS NEAR 10
KNOTS. SEAS 1 TO 2 FEET. SCATTERED SHOWERS AND THUNDERSTORMS.
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page