676
FZUS52 KKEY 080826
CWFKEY
COASTAL WATERS FORECAST FOR THE FLORIDA KEYS
NATIONAL WEATHER SERVICE KEY WEST FL
426 AM EDT THU OCT 8 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.
GMZ005-082030-
SYNOPSIS FOR KEYS COASTAL WATERS FROM OCEAN REEF TO DRY TORTUGAS
426 AM EDT THU OCT 8 2026
SYNOPSIS
HURRICANE ISAIAS, CURRENTLY OVER THE SOUTHWESTERN
GULF WATERS, IS EXPECTED TO MOVE TOWARDS THE NORTH GULF COAST OVER
THE NEXT FEW DAYS, STRENGTHENING AS IT DOES SO. A COLD FRONT
REMAINS DRAPED ACROSS NORTH-CENTRAL FLORIDA WHICH WILL SLOWLY
PRESS SOUTHWARD INFRINGING ON THE SURFACE RIDGE TO ITS SOUTH. IN
DOING SO, THESE SYSTEMS WILL ACT IN TANDEM AND CREATE A TIGHTENING
PRESSURE GRADIENT ACROSS THE KEYS, RESULTING IN FRESHENING MAINLY
SOUTHEAST BREEZES AS WE HEAD INTO THE WEEKEND. IN ADDITION,
MOISTURE WILL ALSO BE ON THE RISE LEADING TO HIGHER RAIN AND
THUNDER CHANCES. ANY SHOWERS AND STORMS WILL BE CAPABLE OF CAUSING
HAZARDOUS MARINE CONDITIONS THROUGH THE WEEKEND.
THE APPROXIMATE SHOREWARD EDGE OF THE GULF STREAM AS OF OCTOBER 2, 2026...
39 NM SOUTH-SOUTHEAST OF DRY TORTUGAS LIGHT, ON LOGGERHEAD KEY
14 NM SOUTH-SOUTHEAST OF COSGROVE SHOAL LIGHT, OFF THE MARQUESAS KEYS
8 NM SOUTH-SOUTHEAST OF SAND KEY LIGHT, OFF KEY WEST
2 NM SOUTH-SOUTHEAST OF LOOE KEY, OFF BIG PINE KEY
1 NM SOUTH-SOUTHEAST OF SOMBRERO KEY LIGHT, OFF MARATHON
0 NM SOUTH-SOUTHEAST OF ALLIGATOR REEF LIGHT, OFF ISLAMORADA
2 NM NORTHWEST OF MOLASSES REEF LIGHT, OFF KEY LARGO
2 NM NORTHWEST OF CARYSFORT REEF LIGHT, OFF OCEAN REEF
GULF STREAM INFORMATION COURTESY OF THE NAVAL OCEANOGRAPHIC OFFICE.
GMZ031-082030-
FLORIDA BAY INCLUDING BARNES SOUND, BLACKWATER SOUND, AND
BUTTONWOOD SOUND-
426 AM EDT THU OCT 8 2026
TODAY
SOUTH WINDS 5 TO 10 KNOTS, BECOMING SOUTHEAST TO SOUTH.
BAY WATERS SMOOTH TO A LIGHT CHOP. A CHANCE OF SHOWERS AND A
SLIGHT CHANCE OF THUNDERSTORMS, MAINLY THIS MORNING.
TONIGHT
SOUTHEAST TO SOUTH WINDS NEAR 5 KNOTS, BECOMING
SOUTHEAST AND INCREASING TO 10 TO 15 KNOTS AFTER MIDNIGHT. BAY
WATERS SMOOTH, BECOMING A LIGHT TO MODERATE CHOP. A SLIGHT CHANCE
OF SHOWERS AND THUNDERSTORMS.
FRIDAY
SOUTHEAST WINDS 10 TO 15 KNOTS. BAY WATERS A LIGHT TO
MODERATE CHOP. A CHANCE OF SHOWERS WITH A SLIGHT CHANCE OF
THUNDERSTORMS.
FRIDAY NIGHT
EAST TO SOUTHEAST WINDS 10 TO 15 KNOTS, BECOMING
SOUTHEAST AND INCREASING TO NEAR 15 KNOTS. BAY WATERS A LIGHT TO
MODERATE CHOP, BECOMING A MODERATE CHOP. SHOWERS LIKELY WITH A
CHANCE OF THUNDERSTORMS.
SATURDAY
SOUTHEAST WINDS NEAR 15 KNOTS. BAY WATERS A MODERATE
CHOP. A CHANCE OF SHOWERS AND THUNDERSTORMS.
SATURDAY NIGHT
EAST TO SOUTHEAST WINDS 10 TO 15 KNOTS, BECOMING
SOUTHEAST AND INCREASING TO NEAR 15 KNOTS. BAY WATERS A LIGHT TO
MODERATE CHOP, BECOMING A MODERATE CHOP. A CHANCE OF SHOWERS AND
THUNDERSTORMS.
SUNDAY
EAST TO SOUTHEAST WINDS NEAR 15 KNOTS, DECREASING TO
NEAR 10 KNOTS IN THE AFTERNOON. BAY WATERS A MODERATE CHOP,
BECOMING A LIGHT CHOP. A SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS.
SUNDAY NIGHT
EAST WINDS 5 TO 10 KNOTS. BAY WATERS SMOOTH TO A
LIGHT CHOP. A SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS.
MONDAY
EAST WINDS 5 TO 10 KNOTS. BAY WATERS SMOOTH TO A LIGHT
CHOP. A SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS.
MONDAY NIGHT
NORTHEAST TO EAST WINDS NEAR 5 KNOTS. BAY WATERS
SMOOTH.
GMZ032-035-082030-
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-
426 AM EDT THU OCT 8 2026
TODAY
SOUTH WINDS NEAR 10 KNOTS, BECOMING SOUTHEAST TO SOUTH.
SEAS AROUND 1 FOOT. NEARSHORE WATERS A LIGHT CHOP. A CHANCE OF
SHOWERS AND A SLIGHT CHANCE OF THUNDERSTORMS, MAINLY THIS MORNING.
TONIGHT
SOUTHEAST WINDS 5 TO 10 KNOTS, INCREASING TO 10 TO
15 KNOTS AFTER MIDNIGHT. SEAS AROUND 1 FOOT, BUILDING TO 1 TO 2
FEET. WEST OF THE MARQUESAS KEYS, SEAS 1 TO 2 FEET, BUILDING TO 2
TO 3 FEET. NEARSHORE WATERS SMOOTH TO A LIGHT CHOP, BECOMING A
LIGHT TO MODERATE CHOP. A SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS.
FRIDAY
SOUTHEAST WINDS NEAR 15 KNOTS. SEAS 1 TO 2 FEET, EXCEPT
2 TO 4 FEET, OCCASIONALLY TO 5 FEET WEST OF THE MARQUESAS KEYS.
NEARSHORE WATERS A MODERATE CHOP. A CHANCE OF SHOWERS WITH A
SLIGHT CHANCE OF THUNDERSTORMS.
FRIDAY NIGHT
SOUTHEAST WINDS NEAR 15 KNOTS. SEAS 2 TO 3 FEET,
EXCEPT 4 TO 5 FEET, OCCASIONALLY TO 6 FEET WEST OF THE MARQUESAS
KEYS. NEARSHORE WATERS A MODERATE CHOP. SHOWERS LIKELY WITH A
CHANCE OF THUNDERSTORMS.
SATURDAY
SOUTHEAST TO SOUTH WINDS NEAR 15 KNOTS. SEAS 2 TO
3 FEET, EXCEPT 3 TO 4 FEET, OCCASIONALLY TO 5 FEET WEST OF THE
MARQUESAS KEYS. NEARSHORE WATERS A MODERATE CHOP. A CHANCE OF
SHOWERS AND THUNDERSTORMS.
SATURDAY NIGHT
EAST TO SOUTHEAST WINDS NEAR 15 KNOTS,
INCREASING TO 15 TO 20 KNOTS. SEAS 2 TO 3 FEET, EXCEPT 3 TO 4
FEET, OCCASIONALLY TO 5 FEET WEST OF THE MARQUESAS KEYS. NEARSHORE
WATERS A MODERATE CHOP, BECOMING CHOPPY. A CHANCE OF SHOWERS AND
THUNDERSTORMS.
SUNDAY
SOUTHEAST WINDS NEAR 15 KNOTS, BECOMING EAST TO
SOUTHEAST AND DECREASING TO NEAR 10 KNOTS IN THE AFTERNOON. SEAS
2 TO 3 FEET, SUBSIDING TO 1 TO 2 FEET. WEST OF THE MARQUESAS KEYS,
SEAS 3 TO 4 FEET, OCCASIONALLY TO 5 FEET, SUBSIDING TO 2 TO 3
FEET. NEARSHORE WATERS A MODERATE CHOP, BECOMING A LIGHT CHOP. A
SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS.
SUNDAY NIGHT
EAST WINDS 5 TO 10 KNOTS. SEAS 1 TO 2 FEET.
NEARSHORE WATERS SMOOTH TO A LIGHT CHOP. A SLIGHT CHANCE OF
SHOWERS.
MONDAY
NORTHEAST TO EAST WINDS 5 TO 10 KNOTS, DECREASING TO
NEAR 5 KNOTS IN THE AFTERNOON. SEAS 1 FOOT OR LESS. NEARSHORE
WATERS SMOOTH TO A LIGHT CHOP, BECOMING SMOOTH. A SLIGHT CHANCE OF
SHOWERS.
MONDAY NIGHT
NORTHEAST WINDS NEAR 5 KNOTS. SEAS 1 FOOT OR
LESS. NEARSHORE WATERS SMOOTH.
GMZ042>044-082030-
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-
426 AM EDT THU OCT 8 2026
TODAY
SOUTH WINDS NEAR 10 KNOTS, EXCEPT 5 TO 10 KNOTS OFF THE
UPPER KEYS, BECOMING SOUTHEAST TO SOUTH. SEAS AROUND 1 FOOT,
EXCEPT 1 TO 2 FEET WEST OF COSGROVE SHOAL LIGHT. NEARSHORE WATERS A
LIGHT CHOP, EXCEPT SMOOTH TO A LIGHT CHOP OFF THE UPPER KEYS. A
CHANCE OF SHOWERS AND A SLIGHT CHANCE OF THUNDERSTORMS, MAINLY
THIS MORNING.
TONIGHT
EAST TO SOUTHEAST WINDS 5 TO 10 KNOTS, BECOMING
SOUTHEAST AND INCREASING TO 10 TO 15 KNOTS AFTER MIDNIGHT. SEAS
AROUND 1 FOOT, BUILDING TO 1 TO 2 FEET. WEST OF COSGROVE SHOAL
LIGHT, SEAS 1 TO 2 FEET, BUILDING TO 2 TO 3 FEET. NEARSHORE WATERS
SMOOTH TO A LIGHT CHOP, BECOMING A LIGHT TO MODERATE CHOP. A
SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS.
FRIDAY
SOUTHEAST WINDS NEAR 15 KNOTS. SEAS AROUND 2 FEET,
BUILDING TO 2 TO 4 FEET, OCCASIONALLY TO 5 FEET. WEST OF COSGROVE
SHOAL LIGHT, SEAS 2 TO 3 FEET, BUILDING TO 3 TO 5 FEET,
OCCASIONALLY TO 6 FEET. NEARSHORE WATERS A MODERATE CHOP. A CHANCE
OF SHOWERS WITH A SLIGHT CHANCE OF THUNDERSTORMS.
FRIDAY NIGHT
SOUTHEAST WINDS NEAR 15 KNOTS. SEAS 2 TO 4 FEET,
OCCASIONALLY TO 5 FEET, EXCEPT 4 TO 5 FEET, OCCASIONALLY TO 6
FEET WEST OF COSGROVE SHOAL LIGHT DUE TO A WEST SWELL. NEARSHORE
WATERS A MODERATE CHOP. SHOWERS LIKELY WITH A CHANCE OF
THUNDERSTORMS.
SATURDAY
SOUTHEAST TO SOUTH WINDS NEAR 15 KNOTS. SEAS 3 TO 5
FEET, OCCASIONALLY TO 6 FEET. NEARSHORE WATERS A MODERATE CHOP. A
CHANCE OF SHOWERS AND THUNDERSTORMS.
SATURDAY NIGHT
EAST TO SOUTHEAST WINDS 10 TO 15 KNOTS,
INCREASING TO 15 TO 20 KNOTS AFTER MIDNIGHT. SEAS 3 TO 5 FEET,
OCCASIONALLY TO 6 FEET. NEARSHORE WATERS A LIGHT TO MODERATE CHOP,
BECOMING CHOPPY. A CHANCE OF SHOWERS AND THUNDERSTORMS.
SUNDAY
EAST TO SOUTHEAST WINDS NEAR 15 KNOTS, DECREASING TO
NEAR 10 KNOTS. SEAS 2 TO 4 FEET, OCCASIONALLY TO 5 FEET,
SUBSIDING TO 2 TO 3 FEET. NEARSHORE WATERS A MODERATE CHOP,
BECOMING A LIGHT CHOP. A SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS.
SUNDAY NIGHT
EAST WINDS NEAR 10 KNOTS. SEAS 1 TO 2 FEET.
NEARSHORE WATERS A LIGHT CHOP. A SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS.
MONDAY
NORTHEAST TO EAST WINDS 5 TO 10 KNOTS. SEAS 1 TO
2 FEET. NEARSHORE WATERS SMOOTH TO A LIGHT CHOP. A SLIGHT CHANCE
OF SHOWERS.
MONDAY NIGHT
NORTHEAST WINDS NEAR 5 KNOTS. SEAS AROUND 1 FOOT.
NEARSHORE WATERS SMOOTH.
GMZ052>055-072>075-082030-
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-
426 AM EDT THU OCT 8 2026
TODAY
SOUTH WINDS NEAR 10 KNOTS, EXCEPT 5 TO 10 KNOTS OFF THE
UPPER KEYS, BECOMING SOUTHEAST TO SOUTH. SEAS 1 TO 2 FEET. WAVE
DETAIL: SOUTH 1 FOOT AT 3 SECONDS. A SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS, MAINLY THIS MORNING.
TONIGHT
EAST TO SOUTHEAST WINDS 5 TO 10 KNOTS, BECOMING
SOUTHEAST AND INCREASING TO 10 TO 15 KNOTS AFTER MIDNIGHT. SEAS 1
TO 2 FEET, BUILDING TO 2 TO 3 FEET. WAVE DETAIL: SOUTHEAST 2 FEET
AT 4 SECONDS. A CHANCE OF SHOWERS WITH A SLIGHT CHANCE OF
THUNDERSTORMS.
FRIDAY
SOUTHEAST WINDS NEAR 15 KNOTS. SEAS 2 TO 3 FEET,
BUILDING TO 3 TO 4 FEET, OCCASIONALLY TO 5 FEET. WEST OF HALFMOON
SHOAL LIGHT, SEAS 3 TO 4 FEET, OCCASIONALLY TO 5 FEET, BUILDING
TO 4 TO 6 FEET, OCCASIONALLY TO 8 FEET DUE TO A WEST SWELL. WAVE
DETAIL: EAST TO SOUTHEAST 3 FEET AT 4 SECONDS AND SOUTHWEST TO
WEST 2 FEET AT 11 SECONDS. A CHANCE OF SHOWERS WITH A SLIGHT
CHANCE OF THUNDERSTORMS.
FRIDAY NIGHT
SOUTHEAST WINDS NEAR 15 KNOTS. SEAS 4 TO 5 FEET,
OCCASIONALLY TO 6 FEET DUE TO A WEST SWELL. SHOWERS LIKELY WITH A
CHANCE OF THUNDERSTORMS.
SATURDAY
SOUTHEAST TO SOUTH WINDS NEAR 15 KNOTS, BECOMING
SOUTHEAST AND DECREASING TO 10 TO 15 KNOTS. SEAS 3 TO 5 FEET,
OCCASIONALLY TO 6 FEET. A CHANCE OF SHOWERS AND THUNDERSTORMS.
SATURDAY NIGHT
EAST TO SOUTHEAST WINDS 10 TO 15 KNOTS,
INCREASING TO 15 TO 20 KNOTS AFTER MIDNIGHT. SEAS 3 TO 4 FEET,
OCCASIONALLY TO 5 FEET, BUILDING TO 4 TO 5 FEET, OCCASIONALLY TO 6
FEET. A CHANCE OF SHOWERS AND THUNDERSTORMS.
SUNDAY
EAST TO SOUTHEAST WINDS NEAR 15 KNOTS, DECREASING TO 10
TO 15 KNOTS. SEAS 3 TO 5 FEET, OCCASIONALLY TO 6 FEET, SUBSIDING
TO 2 TO 4 FEET, OCCASIONALLY TO 5 FEET. A SLIGHT CHANCE OF SHOWERS
AND THUNDERSTORMS.
SUNDAY NIGHT
EAST WINDS 10 TO 15 KNOTS, DECREASING TO NEAR 10
KNOTS. SEAS 2 TO 3 FEET. A SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS.
MONDAY
NORTHEAST TO EAST WINDS 5 TO 10 KNOTS. SEAS AROUND
2 FEET. A SLIGHT CHANCE OF SHOWERS.
MONDAY NIGHT
NORTHEAST TO EAST WINDS 5 TO 10 KNOTS. SEAS 1 TO
2 FEET. A SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS.
GMZ033-034-082030-
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-
426 AM EDT THU OCT 8 2026
TODAY
SOUTH WINDS NEAR 10 KNOTS, BECOMING SOUTHEAST TO SOUTH.
SEAS 1 TO 2 FEET. WAVE DETAIL: SOUTHWEST TO WEST 1 FOOT AT 4
SECONDS. A CHANCE OF SHOWERS WITH A SLIGHT CHANCE OF
THUNDERSTORMS, THEN A SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS
IN THE AFTERNOON.
TONIGHT
SOUTHEAST WINDS 5 TO 10 KNOTS, INCREASING TO 10 TO
15 KNOTS AFTER MIDNIGHT. SEAS 1 TO 2 FEET, BUILDING TO 2 TO 3
FEET. WAVE DETAIL: SOUTHWEST 2 FEET AT 5 SECONDS. A CHANCE OF
SHOWERS WITH A SLIGHT CHANCE OF THUNDERSTORMS.
FRIDAY
SOUTHEAST WINDS NEAR 15 KNOTS. SEAS 2 TO 4 FEET,
OCCASIONALLY TO 5 FEET, BUILDING TO 3 TO 6 FEET, OCCASIONALLY TO
8 FEET DUE TO A WEST SWELL. WAVE DETAIL: SOUTHWEST TO WEST 4 FEET
AT 11 SECONDS AND SOUTHEAST 3 FEET AT 4 SECONDS. A CHANCE OF
SHOWERS WITH A SLIGHT CHANCE OF THUNDERSTORMS.
FRIDAY NIGHT
SOUTHEAST WINDS 15 TO 20 KNOTS. SEAS 4 TO 6 FEET,
OCCASIONALLY TO 8 FEET DUE TO A WEST SWELL. SHOWERS LIKELY WITH A
CHANCE OF THUNDERSTORMS.
SATURDAY
SOUTHEAST TO SOUTH WINDS NEAR 15 KNOTS. SEAS 3 TO
5 FEET, OCCASIONALLY TO 6 FEET, SUBSIDING TO 3 TO 4 FEET,
OCCASIONALLY TO 5 FEET. A CHANCE OF SHOWERS AND THUNDERSTORMS.
SATURDAY NIGHT
SOUTHEAST WINDS 10 TO 15 KNOTS, INCREASING TO
NEAR 15 KNOTS. SEAS 3 TO 4 FEET, OCCASIONALLY TO 5 FEET. SHOWERS
LIKELY WITH A CHANCE OF THUNDERSTORMS.
SUNDAY
SOUTHEAST WINDS NEAR 15 KNOTS, BECOMING EAST TO
SOUTHEAST AND DECREASING TO NEAR 10 KNOTS. SEAS 2 TO 4 FEET,
OCCASIONALLY TO 5 FEET, SUBSIDING TO 2 TO 3 FEET. A SLIGHT CHANCE
OF SHOWERS AND THUNDERSTORMS.
SUNDAY NIGHT
EAST WINDS NEAR 10 KNOTS. SEAS AROUND 2 FEET.
MONDAY
NORTHEAST TO EAST WINDS 5 TO 10 KNOTS. SEAS 1 TO
2 FEET. A SLIGHT CHANCE OF SHOWERS.
MONDAY NIGHT
NORTH TO NORTHEAST WINDS 5 TO 10 KNOTS. SEAS
AROUND 1 FOOT. A SLIGHT CHANCE OF SHOWERS.
MJV
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page