251
FZUS52 KKEY 202018
CWFKEY
COASTAL WATERS FORECAST FOR THE FLORIDA KEYS
NATIONAL WEATHER SERVICE KEY WEST FL
418 PM EDT SAT JUN 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.
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.
GMZ005-210830-
SYNOPSIS FOR KEYS COASTAL WATERS FROM OCEAN REEF TO DRY TORTUGAS
418 PM EDT SAT JUN 20 2026
SYNOPSIS
A BROAD, WEAK HIGH PRESSURE CURRENTLY EXTENDING FROM
THE CENTRAL NORTH ATLANTIC AND ACROSS THE GULF BASIN WILL FRACTURE
INTO TWO CELLS. THIS WILL LEAD TO A WEAKENING PRESSURE FIELD
ACROSS THE FLORIDA KEYS AND SURROUNDING COASTAL WATERS. AS A
RESULT, EXPECT LIGHT AND VARIABLE WINDS AT TIMES CONTINUING
THROUGH SUNDAY NIGHT. THEREAFTER, THE TWO HIGH PRESSURE CELLS WILL
MERGE AND BRIEFLY BUILD, ALLOWING BREEZES TO FRESHEN SLIGHTLY
MONDAY AND MONDAY NIGHT. THE HIGH IS THEN EXPECTED TO WEAKEN AGAIN
WITH LIGHTER BREEZES RETURNING TUESDAY.
THE APPROXIMATE SHOREWARD EDGE OF THE GULF STREAM AS OF JUNE 15...
28 NM SOUTH OF DRY TORTUGAS LIGHT...ON LOGGERHEAD KEY.
12 NM SOUTH OF COSGROVE SHOAL LIGHT...OFF THE MARQUESAS KEYS.
11 NM SOUTH OF SAND KEY LIGHT...OFF KEY WEST.
14 NM SOUTH OF LOOE KEY...OFF BIG PINE KEY.
13 NM SOUTHEAST OF SOMBRERO KEY LIGHT...OFF MARATHON.
8 NM SOUTHEAST OF ALLIGATOR REEF LIGHT...OFF ISLAMORADA.
4 NM SOUTHEAST OF MOLASSES REEF LIGHT...OFF KEY LARGO.
3 NM EAST 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.
GMZ031-210830-
FLORIDA BAY INCLUDING BARNES SOUND, BLACKWATER SOUND, AND
BUTTONWOOD SOUND-
418 PM EDT SAT JUN 20 2026
TONIGHT
WEST TO NORTHWEST WINDS NEAR 5 KNOTS, BECOMING EAST TO
SOUTHEAST 5 TO 10 KNOTS. BAY WATERS SMOOTH, BECOMING SMOOTH TO A
LIGHT CHOP. A SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS.
SUNDAY
SOUTH TO SOUTHWEST WINDS 5 TO 10 KNOTS, BECOMING
SOUTHWEST TO WEST NEAR 5 KNOTS. BAY WATERS SMOOTH TO A LIGHT
CHOP, BECOMING SMOOTH.
SUNDAY NIGHT
VARIABLE WINDS NEAR 5 KNOTS. BAY WATERS SMOOTH.
MONDAY
SOUTHEAST TO SOUTH WINDS 5 TO 10 KNOTS. BAY WATERS
SMOOTH TO A LIGHT CHOP.
MONDAY NIGHT
EAST TO SOUTHEAST WINDS 5 TO 10 KNOTS. BAY WATERS
SMOOTH TO A LIGHT CHOP. A SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS.
TUESDAY
SOUTHEAST WINDS 5 TO 10 KNOTS. BAY WATERS SMOOTH TO A
LIGHT CHOP. A SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS.
TUESDAY NIGHT
EAST WINDS 5 TO 10 KNOTS. BAY WATERS SMOOTH TO A
LIGHT CHOP.
WEDNESDAY
EAST TO SOUTHEAST WINDS NEAR 5 KNOTS. BAY WATERS
SMOOTH. A SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS.
WEDNESDAY NIGHT
EAST TO SOUTHEAST WINDS 5 TO 10 KNOTS. BAY
WATERS SMOOTH TO A LIGHT CHOP. A SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS.
THURSDAY
SOUTHEAST WINDS 5 TO 10 KNOTS. BAY WATERS SMOOTH TO A
LIGHT CHOP. A SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS.
THURSDAY NIGHT
EAST TO SOUTHEAST WINDS NEAR 10 KNOTS. BAY
WATERS A LIGHT CHOP. A SLIGHT CHANCE OF SHOWERS.
GMZ032-035-210830-
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-
418 PM EDT SAT JUN 20 2026
TONIGHT
NORTHWEST TO NORTH WINDS NEAR 5 KNOTS, BECOMING EAST
TO SOUTHEAST 5 TO 10 KNOTS. SEAS 1 FOOT OR LESS. NEARSHORE WATERS
SMOOTH, BECOMING SMOOTH TO A LIGHT CHOP. A SLIGHT CHANCE OF
SHOWERS AND THUNDERSTORMS.
SUNDAY
SOUTH TO SOUTHWEST WINDS 5 TO 10 KNOTS, BECOMING
SOUTHWEST TO WEST NEAR 5 KNOTS IN THE AFTERNOON. SEAS 1 FOOT OR
LESS. NEARSHORE WATERS SMOOTH TO A LIGHT CHOP, BECOMING SMOOTH.
SUNDAY NIGHT
VARIABLE WINDS NEAR 5 KNOTS. SEAS 1 FOOT OR LESS.
NEARSHORE WATERS SMOOTH.
MONDAY
SOUTHEAST WINDS NEAR 5 KNOTS, BECOMING NORTHEAST TO EAST.
SEAS 1 FOOT OR LESS. NEARSHORE WATERS SMOOTH.
MONDAY NIGHT
NORTHEAST TO EAST WINDS 5 TO 10 KNOTS, BECOMING
EAST TO SOUTHEAST. SEAS 1 FOOT OR LESS. NEARSHORE WATERS SMOOTH
TO A LIGHT CHOP. A SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS.
TUESDAY
SOUTHEAST WINDS 5 TO 10 KNOTS. SEAS 1 FOOT OR LESS.
NEARSHORE WATERS SMOOTH TO A LIGHT CHOP. A SLIGHT CHANCE OF
SHOWERS AND THUNDERSTORMS.
TUESDAY NIGHT
EAST TO SOUTHEAST WINDS 5 TO 10 KNOTS. SEAS 1
FOOT OR LESS. NEARSHORE WATERS SMOOTH TO A LIGHT CHOP.
WEDNESDAY
NORTHEAST TO EAST WINDS NEAR 5 KNOTS. SEAS 1 FOOT OR
LESS. NEARSHORE WATERS SMOOTH. A SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS.
WEDNESDAY NIGHT
EAST TO SOUTHEAST WINDS 5 TO 10 KNOTS. SEAS 1
FOOT OR LESS. NEARSHORE WATERS SMOOTH TO A LIGHT CHOP. A SLIGHT
CHANCE OF SHOWERS AND THUNDERSTORMS.
THURSDAY
EAST TO SOUTHEAST WINDS 5 TO 10 KNOTS. SEAS 1 FOOT OR
LESS. NEARSHORE WATERS SMOOTH TO A LIGHT CHOP. A SLIGHT CHANCE OF
SHOWERS.
THURSDAY NIGHT
EAST TO SOUTHEAST WINDS NEAR 10 KNOTS. SEAS
AROUND 1 FOOT. NEARSHORE WATERS A LIGHT CHOP. A SLIGHT CHANCE OF
SHOWERS.
GMZ042>044-210830-
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-
418 PM EDT SAT JUN 20 2026
TONIGHT
NORTH TO NORTHEAST WINDS NEAR 5 KNOTS, BECOMING EAST
TO SOUTHEAST. SEAS AROUND 1 FOOT. NEARSHORE WATERS SMOOTH,
BECOMING SMOOTH TO A LIGHT CHOP. A SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS.
SUNDAY
SOUTH WINDS 5 TO 10 KNOTS, BECOMING SOUTHWEST IN THE
AFTERNOON. SEAS AROUND 1 FOOT. NEARSHORE WATERS SMOOTH TO A LIGHT
CHOP, BECOMING SMOOTH.
SUNDAY NIGHT
NORTH TO NORTHEAST WINDS NEAR 5 KNOTS, BECOMING
EAST TO SOUTHEAST AFTER MIDNIGHT. SEAS 1 FOOT OR LESS. NEARSHORE
WATERS SMOOTH.
MONDAY
EAST TO SOUTHEAST WINDS NEAR 5 KNOTS. SEAS 1 FOOT OR
LESS. NEARSHORE WATERS SMOOTH.
MONDAY NIGHT
EAST WINDS 5 TO 10 KNOTS. SEAS AROUND 1 FOOT.
NEARSHORE WATERS SMOOTH TO A LIGHT CHOP. A SLIGHT CHANCE OF
SHOWERS AND THUNDERSTORMS.
TUESDAY
EAST TO SOUTHEAST WINDS 5 TO 10 KNOTS. SEAS 1 TO
2 FEET. NEARSHORE WATERS SMOOTH TO A LIGHT CHOP.
TUESDAY NIGHT
EAST WINDS 5 TO 10 KNOTS. SEAS AROUND 1 FOOT.
NEARSHORE WATERS SMOOTH TO A LIGHT CHOP.
WEDNESDAY
EAST WINDS NEAR 5 KNOTS. SEAS AROUND 1 FOOT.
NEARSHORE WATERS SMOOTH.
WEDNESDAY NIGHT
EAST WINDS 5 TO 10 KNOTS. SEAS AROUND 1 FOOT.
NEARSHORE WATERS SMOOTH TO A LIGHT CHOP. A SLIGHT CHANCE OF
SHOWERS AND THUNDERSTORMS.
THURSDAY
EAST TO SOUTHEAST WINDS 5 TO 10 KNOTS. SEAS AROUND 1
FOOT. NEARSHORE WATERS SMOOTH TO A LIGHT CHOP. A SLIGHT CHANCE OF
SHOWERS.
THURSDAY NIGHT
EAST TO SOUTHEAST WINDS NEAR 10 KNOTS. SEAS
1 TO 2 FEET. NEARSHORE WATERS A LIGHT CHOP. A SLIGHT CHANCE OF
SHOWERS.
GMZ052>055-072>075-210830-
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-
418 PM EDT SAT JUN 20 2026
TONIGHT
EAST WINDS 5 TO 10 KNOTS. SEAS AROUND 1 FOOT. WAVE
DETAIL: EAST TO SOUTHEAST 1 FOOT AT 4 SECONDS. A SLIGHT CHANCE OF
SHOWERS AND THUNDERSTORMS.
SUNDAY
SOUTHEAST TO SOUTH WINDS 5 TO 10 KNOTS, BECOMING
VARIABLE NEAR 5 KNOTS IN THE AFTERNOON. SEAS AROUND 1 FOOT. WAVE
DETAIL: EAST TO SOUTHEAST 1 FOOT AT 3 SECONDS.
SUNDAY NIGHT
NORTHEAST WINDS 5 TO 10 KNOTS, BECOMING EAST TO
SOUTHEAST. SEAS AROUND 1 FOOT. WAVE DETAIL: NORTHEAST 1 FOOT AT 3
SECONDS.
MONDAY
EAST TO SOUTHEAST WINDS 5 TO 10 KNOTS. SEAS AROUND
1 FOOT.
MONDAY NIGHT
NORTHEAST TO EAST WINDS NEAR 10 KNOTS, BECOMING
EAST TO SOUTHEAST 10 TO 15 KNOTS. SEAS 1 TO 2 FEET, BUILDING TO
AROUND 2 FEET. A SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS.
TUESDAY
EAST TO SOUTHEAST WINDS 10 TO 15 KNOTS, BECOMING
NORTHEAST TO EAST NEAR 10 KNOTS. SEAS AROUND 2 FEET.
TUESDAY NIGHT
NORTHEAST TO EAST WINDS NEAR 10 KNOTS. SEAS
AROUND 2 FEET. A SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS.
WEDNESDAY
NORTHEAST TO EAST WINDS 5 TO 10 KNOTS. SEAS 1 TO 2
FEET.
WEDNESDAY NIGHT
NORTHEAST TO EAST WINDS 5 TO 10 KNOTS, BECOMING
EAST TO SOUTHEAST NEAR 10 KNOTS. SEAS 1 TO 2 FEET. A SLIGHT
CHANCE OF SHOWERS AND THUNDERSTORMS.
THURSDAY
EAST TO SOUTHEAST WINDS NEAR 10 KNOTS. SEAS 1 TO 2
FEET.
THURSDAY NIGHT
EAST TO SOUTHEAST WINDS NEAR 10 KNOTS. SEAS 1 TO
2 FEET. A SLIGHT CHANCE OF SHOWERS.
GMZ033-034-210830-
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-
418 PM EDT SAT JUN 20 2026
TONIGHT
NORTH TO NORTHEAST WINDS NEAR 5 KNOTS, BECOMING
SOUTHEAST. SEAS AROUND 1 FOOT. WAVE DETAIL: EAST TO SOUTHEAST 1
FOOT AT 3 SECONDS AND WEST 1 FOOT AT 5 SECONDS.
SUNDAY
SOUTH WINDS 5 TO 10 KNOTS, BECOMING VARIABLE NEAR 5
KNOTS. SEAS AROUND 1 FOOT. WAVE DETAIL: SOUTHEAST TO SOUTH 1 FOOT
AT 2 SECONDS.
SUNDAY NIGHT
NORTH TO NORTHEAST WINDS NEAR 5 KNOTS, BECOMING
EAST TO SOUTHEAST. SEAS AROUND 1 FOOT. WAVE DETAIL: NORTHWEST TO
NORTH 1 FOOT AT 4 SECONDS.
MONDAY
SOUTHEAST WINDS NEAR 5 KNOTS, BECOMING NORTHEAST TO
EAST. SEAS 1 FOOT OR LESS.
MONDAY NIGHT
NORTHEAST WINDS 5 TO 10 KNOTS. SEAS 1 FOOT OR
LESS. A SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS.
TUESDAY
EAST TO SOUTHEAST WINDS 5 TO 10 KNOTS. SEAS AROUND
1 FOOT. A SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS.
TUESDAY NIGHT
EAST WINDS NEAR 5 KNOTS. SEAS 1 FOOT OR LESS. A
SLIGHT CHANCE OF SHOWERS.
WEDNESDAY
NORTHEAST TO EAST WINDS NEAR 5 KNOTS. SEAS 1 FOOT OR
LESS. A SLIGHT CHANCE OF SHOWERS.
WEDNESDAY NIGHT
NORTHEAST TO EAST WINDS NEAR 5 KNOTS. SEAS
1 FOOT OR LESS. A SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS.
THURSDAY
EAST TO SOUTHEAST WINDS 5 TO 10 KNOTS. SEAS AROUND
1 FOOT.
THURSDAY NIGHT
EAST TO SOUTHEAST WINDS 5 TO 10 KNOTS. SEAS
AROUND 1 FOOT. A SLIGHT CHANCE OF SHOWERS.
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