303
FZUS52 KKEY 200832
CWFKEY
COASTAL WATERS FORECAST FOR THE FLORIDA KEYS
NATIONAL WEATHER SERVICE KEY WEST FL
432 AM EDT SUN SEP 20 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.
GMZ005-202045-
SYNOPSIS FOR KEYS COASTAL WATERS FROM OCEAN REEF TO DRY TORTUGAS
432 AM EDT SUN SEP 20 2026
SYNOPSIS
LIGHT TO GENTLE MAINLY SOUTHERLY BREEZES WILL BE IN PLACE THROUGH
THE REMAINDER OF THE WEEKEND, THOUGH A PERIOD OF VARIABLE WINDS
ARE EXPECTED DURING THE LATE AFTERNOON AND EVENING HOURS ON
SUNDAY. IN ADDITION, A WET WEATHER PATTERN WILL CONTINUE TO
PERSIST ACROSS THE FLORIDA KEYS COASTAL WATERS INTO THE NEW WEEK
AS AN UPPER-LEVEL LOW LINGERS IN THE EASTERN GULF WATERS. AS A
RESULT, SCATTERED TO NUMEROUS SHOWERS AND THUNDERSTORMS WILL BE A
DAILY OCCURENCE WITH GUSTY WINDS, LIGHTNING STRIKES, BLINDING
DOWNPOURS, AND LOCALLY HAZARDOUS SEAS BEING THE MAIN HAZARDS
MARINERS COULD ENCOUNTER IN THE VICINITY OF THIS ACTIVITY. THE
UPPER-LEVEL LOW IS FORECAST TO MOVE OUT OF THE AREA BY TUESDAY,
BUT LINGERING MOISTURE IS LIKELY TO PERSIST THROUGH AT LEAST THE
MIDDLE OF THE WEEK SO RAIN CHANCES WILL CONTINUE TO REMAIN
ELEVATED. WINDS WILL GENERALLY REMAIN LIGHT TO GENTLE INTO THE NEW
WEEK BUT BRIEF PERIODS OF MODERATE WINDS MAY OCCUR IN THE EVENING
HOURS WITH WINDS REMAINING MOSTLY OUT OF THE SOUTH TO SOUTHEAST.
THE APPROXIMATE SHOREWARD EDGE OF THE GULF STREAM AS OF SEPTEMBER
15, 2026...
64 NM SOUTH-SOUTHEAST OF DRY TORTUGAS LIGHT, ON LOGGERHEAD KEY
40 NM SOUTH-SOUTHEAST OF COSGROVE SHOAL LIGHT, OFF THE MARQUESAS KEYS
36 NM SOUTH-SOUTHEAST OF SAND KEY LIGHT, OFF KEY WEST
35 NM SOUTHEAST OF LOOE KEY, OFF BIG PINE KEY
28 NM SOUTHEAST OF SOMBRERO KEY LIGHT, OFF MARATHON
15 NM EAST-SOUTHEAST OF ALLIGATOR REEF LIGHT, OFF ISLAMORADA
8 NM EAST-SOUTHEAST OF MOLASSES REEF LIGHT, OFF KEY LARGO
5 NM EAST-SOUTHEAST OF CARYSFORT REEF LIGHT, OFF OCEAN REEF
GULF STREAM INFORMATION COURTESY OF THE NAVAL OCEANOGRAPHIC OFFICE.
GMZ031-202045-
FLORIDA BAY INCLUDING BARNES SOUND, BLACKWATER SOUND, AND
BUTTONWOOD SOUND-
432 AM EDT SUN SEP 20 2026
TODAY
VARIABLE WINDS NEAR 5 KNOTS, BECOMING SOUTH TO SOUTHWEST.
BAY WATERS SMOOTH. SHOWERS LIKELY WITH A CHANCE OF THUNDERSTORMS.
TONIGHT
SOUTHEAST TO SOUTH WINDS NEAR 5 KNOTS, BECOMING SOUTH
AND INCREASING TO 5 TO 10 KNOTS. BAY WATERS SMOOTH, BECOMING
SMOOTH TO A LIGHT CHOP. A CHANCE OF SHOWERS AND THUNDERSTORMS.
MONDAY
SOUTH TO SOUTHWEST WINDS 5 TO 10 KNOTS. BAY WATERS
SMOOTH TO A LIGHT CHOP. SHOWERS LIKELY WITH A CHANCE OF
THUNDERSTORMS.
MONDAY NIGHT
SOUTH WINDS 5 TO 10 KNOTS. BAY WATERS SMOOTH TO A
LIGHT CHOP. SHOWERS LIKELY WITH A CHANCE OF THUNDERSTORMS.
TUESDAY
SOUTHEAST TO SOUTH WINDS 5 TO 10 KNOTS. BAY WATERS
SMOOTH TO A LIGHT CHOP. SHOWERS LIKELY WITH A CHANCE OF
THUNDERSTORMS.
TUESDAY NIGHT
SOUTHEAST TO SOUTH WINDS 5 TO 10 KNOTS. BAY
WATERS SMOOTH TO A LIGHT CHOP. SHOWERS LIKELY WITH A CHANCE OF
THUNDERSTORMS.
WEDNESDAY
SOUTHEAST TO SOUTH WINDS 5 TO 10 KNOTS. BAY WATERS
SMOOTH TO A LIGHT CHOP. SHOWERS LIKELY WITH A CHANCE OF
THUNDERSTORMS.
WEDNESDAY NIGHT
SOUTHEAST TO SOUTH WINDS NEAR 5 KNOTS. BAY
WATERS SMOOTH. A CHANCE OF SHOWERS AND THUNDERSTORMS.
THURSDAY
NORTHEAST WINDS NEAR 5 KNOTS, BECOMING SOUTH. BAY
WATERS SMOOTH. SHOWERS LIKELY WITH A CHANCE OF THUNDERSTORMS.
THURSDAY NIGHT
SOUTHEAST WINDS NEAR 5 KNOTS, BECOMING NORTH.
BAY WATERS SMOOTH. A CHANCE OF SHOWERS AND THUNDERSTORMS.
GMZ032-035-202045-
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-
432 AM EDT SUN SEP 20 2026
TODAY
SOUTHEAST TO SOUTH WINDS NEAR 5 KNOTS, BECOMING
SOUTHWEST. SEAS 1 FOOT OR LESS. NEARSHORE WATERS SMOOTH. SHOWERS
LIKELY WITH A CHANCE OF THUNDERSTORMS.
TONIGHT
SOUTHEAST TO SOUTH WINDS NEAR 5 KNOTS, BECOMING SOUTH.
SEAS 1 FOOT OR LESS. NEARSHORE WATERS SMOOTH. SHOWERS LIKELY WITH
A CHANCE OF THUNDERSTORMS.
MONDAY
SOUTH TO SOUTHWEST WINDS 5 TO 10 KNOTS. SEAS AROUND 1
FOOT. NEARSHORE WATERS SMOOTH TO A LIGHT CHOP. SHOWERS LIKELY
WITH A CHANCE OF THUNDERSTORMS.
MONDAY NIGHT
SOUTH WINDS 5 TO 10 KNOTS. SEAS AROUND 1 FOOT.
NEARSHORE WATERS SMOOTH TO A LIGHT CHOP. SHOWERS LIKELY WITH A
CHANCE OF THUNDERSTORMS.
TUESDAY
SOUTHEAST TO SOUTH WINDS 5 TO 10 KNOTS. SEAS AROUND 1
FOOT. NEARSHORE WATERS SMOOTH TO A LIGHT CHOP. SHOWERS LIKELY
WITH A CHANCE OF THUNDERSTORMS.
TUESDAY NIGHT
SOUTHEAST TO SOUTH WINDS 5 TO 10 KNOTS. SEAS
AROUND 1 FOOT. NEARSHORE WATERS SMOOTH TO A LIGHT CHOP. SHOWERS
LIKELY WITH A CHANCE OF THUNDERSTORMS.
WEDNESDAY
SOUTHEAST TO SOUTH WINDS 5 TO 10 KNOTS. SEAS AROUND 1
FOOT. NEARSHORE WATERS SMOOTH TO A LIGHT CHOP. SHOWERS LIKELY
WITH A CHANCE OF THUNDERSTORMS.
WEDNESDAY NIGHT
SOUTHEAST TO SOUTH WINDS NEAR 5 KNOTS. SEAS
1 FOOT OR LESS. NEARSHORE WATERS SMOOTH. SHOWERS LIKELY WITH A
CHANCE OF THUNDERSTORMS.
THURSDAY
SOUTHEAST TO SOUTH WINDS NEAR 5 KNOTS. SEAS 1 FOOT OR
LESS. NEARSHORE WATERS SMOOTH. SHOWERS LIKELY WITH A CHANCE OF
THUNDERSTORMS.
THURSDAY NIGHT
EAST TO SOUTHEAST WINDS NEAR 5 KNOTS. SEAS
1 FOOT OR LESS. NEARSHORE WATERS SMOOTH. A CHANCE OF SHOWERS AND
THUNDERSTORMS.
GMZ042>044-202045-
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-
432 AM EDT SUN SEP 20 2026
TODAY
SOUTH TO SOUTHWEST WINDS NEAR 5 KNOTS. SEAS 1 FOOT OR
LESS. NEARSHORE WATERS SMOOTH. SHOWERS LIKELY WITH A CHANCE OF
THUNDERSTORMS.
TONIGHT
SOUTH WINDS NEAR 5 KNOTS, INCREASING TO 5 TO 10 KNOTS.
SEAS AROUND 1 FOOT. NEARSHORE WATERS SMOOTH, BECOMING SMOOTH TO A
LIGHT CHOP. SHOWERS LIKELY WITH A CHANCE OF THUNDERSTORMS.
MONDAY
SOUTH TO SOUTHWEST WINDS 5 TO 10 KNOTS. SEAS AROUND
1 FOOT. NEARSHORE WATERS SMOOTH TO A LIGHT CHOP. A CHANCE OF
SHOWERS AND THUNDERSTORMS.
MONDAY NIGHT
SOUTH WINDS 5 TO 10 KNOTS. SEAS AROUND 1 FOOT.
NEARSHORE WATERS SMOOTH TO A LIGHT CHOP. SHOWERS LIKELY WITH A
CHANCE OF THUNDERSTORMS.
TUESDAY
SOUTHEAST TO SOUTH WINDS 5 TO 10 KNOTS. SEAS AROUND
1 FOOT. NEARSHORE WATERS SMOOTH TO A LIGHT CHOP. SHOWERS LIKELY
WITH A CHANCE OF THUNDERSTORMS.
TUESDAY NIGHT
SOUTHEAST TO SOUTH WINDS 5 TO 10 KNOTS. SEAS
AROUND 1 FOOT. NEARSHORE WATERS SMOOTH TO A LIGHT CHOP. SHOWERS
LIKELY WITH A CHANCE OF THUNDERSTORMS.
WEDNESDAY
SOUTHEAST TO SOUTH WINDS 5 TO 10 KNOTS. SEAS AROUND
1 FOOT. NEARSHORE WATERS SMOOTH TO A LIGHT CHOP. SHOWERS LIKELY
WITH A CHANCE OF THUNDERSTORMS.
WEDNESDAY NIGHT
SOUTHEAST TO SOUTH WINDS 5 TO 10 KNOTS. SEAS
AROUND 1 FOOT. NEARSHORE WATERS SMOOTH TO A LIGHT CHOP. SHOWERS
LIKELY WITH A CHANCE OF THUNDERSTORMS.
THURSDAY
SOUTHEAST TO SOUTH WINDS NEAR 5 KNOTS. SEAS AROUND
1 FOOT. NEARSHORE WATERS SMOOTH. SHOWERS LIKELY WITH A CHANCE OF
THUNDERSTORMS.
THURSDAY NIGHT
SOUTHEAST TO SOUTH WINDS NEAR 5 KNOTS. SEAS
AROUND 1 FOOT. NEARSHORE WATERS SMOOTH. A CHANCE OF SHOWERS AND
THUNDERSTORMS.
GMZ052>055-072>075-202045-
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-
432 AM EDT SUN SEP 20 2026
TODAY
SOUTH TO SOUTHWEST WINDS 5 TO 10 KNOTS. SEAS 1 TO 2 FEET.
WAVE DETAIL: SOUTHEAST 1 FOOT AT 4 SECONDS. SHOWERS LIKELY WITH A
CHANCE OF THUNDERSTORMS.
TONIGHT
SOUTH WINDS 5 TO 10 KNOTS. SEAS 1 TO 2 FEET. WAVE
DETAIL: SOUTHEAST TO SOUTH 1 FOOT AT 3 SECONDS. SHOWERS LIKELY
WITH A CHANCE OF THUNDERSTORMS.
MONDAY
SOUTHWEST WINDS 5 TO 10 KNOTS. SEAS 1 TO 2 FEET. WAVE
DETAIL: SOUTHEAST TO SOUTH 1 FOOT AT 3 SECONDS. A CHANCE OF
SHOWERS AND THUNDERSTORMS.
MONDAY NIGHT
SOUTHEAST TO SOUTH WINDS 5 TO 10 KNOTS,
INCREASING TO 10 TO 15 KNOTS. SEAS 1 TO 2 FEET. SHOWERS LIKELY
WITH A CHANCE OF THUNDERSTORMS.
TUESDAY
SOUTHEAST TO SOUTH WINDS 5 TO 10 KNOTS. SEAS 1 TO 2
FEET. SHOWERS LIKELY WITH A CHANCE OF THUNDERSTORMS.
TUESDAY NIGHT
SOUTHEAST TO SOUTH WINDS 5 TO 10 KNOTS. SEAS 1 TO
2 FEET. SHOWERS LIKELY WITH A CHANCE OF THUNDERSTORMS.
WEDNESDAY
SOUTHEAST TO SOUTH WINDS 5 TO 10 KNOTS. SEAS 1 TO 2
FEET. SHOWERS WITH A CHANCE OF THUNDERSTORMS.
WEDNESDAY NIGHT
SOUTHEAST WINDS 5 TO 10 KNOTS. SEAS 1 TO 2 FEET.
SHOWERS LIKELY WITH A CHANCE OF THUNDERSTORMS.
THURSDAY
SOUTHEAST TO SOUTH WINDS 5 TO 10 KNOTS. SEAS AROUND
1 FOOT. SHOWERS LIKELY WITH A CHANCE OF THUNDERSTORMS.
THURSDAY NIGHT
SOUTHEAST TO SOUTH WINDS NEAR 5 KNOTS. SEAS
AROUND 1 FOOT. A CHANCE OF SHOWERS AND THUNDERSTORMS.
GMZ033-034-202045-
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-
432 AM EDT SUN SEP 20 2026
TODAY
SOUTH WINDS NEAR 5 KNOTS, BECOMING LIGHT AND VARIABLE.
SEAS 1 FOOT OR LESS. WAVE DETAIL: SOUTH 1 FOOT AT 2 SECONDS.
SHOWERS LIKELY WITH A CHANCE OF THUNDERSTORMS.
TONIGHT
EAST TO SOUTHEAST WINDS NEAR 5 KNOTS, BECOMING SOUTH.
SEAS 1 FOOT OR LESS. WAVE DETAIL: SOUTH 1 FOOT AT 3 SECONDS.
SHOWERS LIKELY WITH A CHANCE OF THUNDERSTORMS.
MONDAY
SOUTH TO SOUTHWEST WINDS NEAR 5 KNOTS. SEAS 1 FOOT OR
LESS. WAVE DETAIL: SOUTH 1 FOOT AT 3 SECONDS. A CHANCE OF SHOWERS
AND THUNDERSTORMS.
MONDAY NIGHT
SOUTHEAST TO SOUTH WINDS 5 TO 10 KNOTS. SEAS
AROUND 1 FOOT. SHOWERS LIKELY WITH A CHANCE OF THUNDERSTORMS.
TUESDAY
SOUTH WINDS 5 TO 10 KNOTS. SEAS AROUND 1 FOOT. SHOWERS
LIKELY WITH A CHANCE OF THUNDERSTORMS.
TUESDAY NIGHT
SOUTHEAST TO SOUTH WINDS 5 TO 10 KNOTS. SEAS
AROUND 1 FOOT. SHOWERS LIKELY WITH A CHANCE OF THUNDERSTORMS.
WEDNESDAY
SOUTHEAST TO SOUTH WINDS 5 TO 10 KNOTS. SEAS AROUND
1 FOOT. SHOWERS LIKELY WITH A CHANCE OF THUNDERSTORMS.
WEDNESDAY NIGHT
SOUTHEAST WINDS 5 TO 10 KNOTS. SEAS AROUND
1 FOOT. A CHANCE OF THUNDERSTORMS. A CHANCE OF SHOWERS.
THURSDAY
EAST TO SOUTHEAST WINDS NEAR 5 KNOTS. SEAS 1 FOOT OR
LESS. A CHANCE OF THUNDERSTORMS. SHOWERS LIKELY.
THURSDAY NIGHT
EAST WINDS NEAR 5 KNOTS. SEAS 1 FOOT OR LESS. A
CHANCE OF SHOWERS AND THUNDERSTORMS.
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