312
FZUS52 KKEY 300818
CWFKEY
COASTAL WATERS FORECAST FOR THE FLORIDA KEYS
NATIONAL WEATHER SERVICE KEY WEST FL
418 AM EDT THU OCT 30 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.
GMZ005-302030-
SYNOPSIS FOR KEYS COASTAL WATERS FROM OCEAN REEF TO DRY TORTUGAS
418 AM EDT THU OCT 30 2025
SYNOPSIS
A STRONG COLD FRONT SWEEPING ACROSS THE FLORIDA KEYS
AND SURROUNDING COASTAL WATERS THIS MORNING, WILL EXIT TO THE
SOUTHEAST BY THIS AFTERNOON. IN THE WAKE OF THE FRONT, WINDS WILL
BACK TO THE NORTHWEST AND FRESHEN. HIGH PRESSURE WILL BUILD IN
BEHIND THE FRONT AS IT MOVES ALONG THE GULF TOWARDS THE WESTERN
ATLANTIC. THIS WILL ALLOW BREEZES TO SLOWLY SLACKEN OVER THE
WEEKEND. A DEVELOPING LOW PRESSURE SYSTEM OVER THE SOUTHEAST U.S.
MAY FRESHEN WINDS AGAIN STARTING LATE MONDAY.
THE APPROXIMATE SHOREWARD EDGE OF THE GULF STREAM AS OF OCTOBER
28...
49 NM SOUTH OF DRY TORTUGAS LIGHT...ON LOGGERHEAD KEY.
40 NM SOUTH OF COSGROVE SHOAL LIGHT...OFF THE MARQUESAS KEYS.
20 NM SOUTH OF SAND KEY LIGHT...OFF KEY WEST.
17 NM SOUTH OF LOOE KEY...OFF BIG PINE KEY.
17 NM SOUTHEAST OF SOMBRERO KEY LIGHT...OFF MARATHON.
4 NM SOUTHEAST OF ALLIGATOR REEF LIGHT...OFF ISLAMORADA.
2 NM SOUTHEAST OF MOLASSES REEF LIGHT...OFF KEY LARGO.
2 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.
GMZ031-302030-
FLORIDA BAY INCLUDING BARNES SOUND, BLACKWATER SOUND, AND
BUTTONWOOD SOUND-
418 AM EDT THU OCT 30 2025
..SMALL CRAFT ADVISORY IN EFFECT
TODAY
NORTHWEST WINDS 15 TO 20 KNOTS EARLY, INCREASING TO NEAR
20 KNOTS. BAY WATERS CHOPPY, BECOMING ROUGH. ISOLATED SHOWERS.
TONIGHT
NORTHWEST TO NORTH WINDS 15 TO 20 KNOTS EARLY,
DECREASING TO 10 TO 15 KNOTS. BAY WATERS CHOPPY, BECOMING A LIGHT
TO MODERATE CHOP.
FRIDAY
NORTH TO NORTHEAST WINDS 10 TO 15 KNOTS EARLY,
DECREASING TO 5 TO 10 KNOTS IN THE AFTERNOON. BAY WATERS A LIGHT
TO MODERATE CHOP, BECOMING SMOOTH TO A LIGHT CHOP.
FRIDAY NIGHT
NORTH TO NORTHEAST WINDS 5 TO 10 KNOTS, INCREASING
TO NEAR 10 KNOTS AFTER MIDNIGHT. BAY WATERS SMOOTH TO A LIGHT CHOP,
BECOMING A LIGHT CHOP.
SATURDAY
NORTHEAST TO EAST WINDS 10 TO 15 KNOTS. BAY WATERS A
LIGHT TO MODERATE CHOP.
SATURDAY NIGHT
NORTHEAST TO EAST WINDS NEAR 15 KNOTS. BAY
WATERS A MODERATE CHOP. ISOLATED SHOWERS.
SUNDAY
NORTHEAST TO EAST WINDS NEAR 15 KNOTS. BAY WATERS A
MODERATE CHOP. ISOLATED SHOWERS.
SUNDAY NIGHT
NORTHEAST WINDS NEAR 15 KNOTS. BAY WATERS A
MODERATE CHOP. SCATTERED SHOWERS.
MONDAY
NORTH TO NORTHEAST WINDS 10 TO 15 KNOTS, BECOMING
NORTHWEST TO NORTH NEAR 15 KNOTS. BAY WATERS A LIGHT TO MODERATE
CHOP, BECOMING A MODERATE CHOP. SCATTERED SHOWERS.
MONDAY NIGHT
NORTHWEST TO NORTH WINDS 15 TO 20 KNOTS. BAY
WATERS CHOPPY. ISOLATED SHOWERS.
GMZ032-035-302030-
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 AM EDT THU OCT 30 2025
..SMALL CRAFT ADVISORY IN EFFECT
TODAY
NORTHWEST WINDS 20 TO 25 KNOTS, DECREASING TO NEAR 20
KNOTS LATE. SEAS 3 TO 5 FEET, OCCASIONALLY TO 6 FEET, EXCEPT 6 TO
7 FEET, OCCASIONALLY TO 9 FEET WEST OF THE MARQUESAS KEYS.
NEARSHORE WATERS VERY ROUGH, BECOMING ROUGH. ISOLATED SHOWERS.
TONIGHT
NORTHWEST WINDS 15 TO 20 KNOTS, BECOMING NORTHWEST TO
NORTH 10 TO 15 KNOTS AFTER MIDNIGHT. SEAS 3 TO 5 FEET,
OCCASIONALLY TO 6 FEET, SUBSIDING TO 2 TO 4 FEET. WEST OF THE
MARQUESAS KEYS, SEAS 4 TO 6 FEET, OCCASIONALLY TO 8 FEET,
SUBSIDING TO 4 TO 5 FEET. NEARSHORE WATERS CHOPPY, BECOMING A
LIGHT TO MODERATE CHOP. ISOLATED SHOWERS.
FRIDAY
NORTH TO NORTHEAST WINDS NEAR 10 KNOTS, DECREASING TO 5
TO 10 KNOTS. SEAS 2 TO 3 FEET, EXCEPT 3 TO 4 FEET, OCCASIONALLY
TO 5 FEET WEST OF THE MARQUESAS KEYS. NEARSHORE WATERS A LIGHT
CHOP, BECOMING SMOOTH TO A LIGHT CHOP.
FRIDAY NIGHT
NORTH TO NORTHEAST WINDS 5 TO 10 KNOTS, INCREASING
TO 10 TO 15 KNOTS AFTER MIDNIGHT. SEAS 2 TO 3 FEET. NEARSHORE
WATERS SMOOTH TO A LIGHT CHOP, BECOMING A LIGHT TO MODERATE CHOP.
SATURDAY
NORTHEAST WINDS NEAR 15 KNOTS, BECOMING NORTHEAST TO
EAST 10 TO 15 KNOTS. SEAS 2 TO 3 FEET. NEARSHORE WATERS A MODERATE
CHOP, BECOMING A LIGHT TO MODERATE CHOP.
SATURDAY NIGHT
NORTHEAST TO EAST WINDS INCREASING TO NEAR 15
KNOTS. SEAS 1 TO 2 FEET, EXCEPT 2 TO 3 FEET WEST OF THE MARQUESAS
KEYS. NEARSHORE WATERS BECOMING A MODERATE CHOP. ISOLATED
SHOWERS.
SUNDAY
NORTHEAST WINDS NEAR 15 KNOTS. SEAS 2 TO 3 FEET.
NEARSHORE WATERS A MODERATE CHOP. ISOLATED SHOWERS.
SUNDAY NIGHT
NORTHEAST WINDS NEAR 15 KNOTS. SEAS 2 TO 3 FEET,
EXCEPT 3 TO 5 FEET WEST OF THE MARQUESAS KEYS. NEARSHORE WATERS A
MODERATE CHOP. ISOLATED SHOWERS.
MONDAY
NORTH TO NORTHEAST WINDS NEAR 15 KNOTS, BECOMING
NORTHWEST TO NORTH. SEAS 2 TO 3 FEET, EXCEPT 3 TO 4 FEET WEST OF
THE MARQUESAS KEYS. NEARSHORE WATERS A MODERATE CHOP. ISOLATED
SHOWERS.
MONDAY NIGHT
NORTHWEST TO NORTH WINDS 15 TO 20 KNOTS, BECOMING
NORTH TO NORTHEAST. SEAS BUILDING TO 3 TO 5 FEET, OCCASIONALLY TO
6 FEET, EXCEPT BUILDING TO 4 TO 6 FEET, OCCASIONALLY TO 8 FEET
WEST OF THE MARQUESAS KEYS. NEARSHORE WATERS CHOPPY. ISOLATED
SHOWERS.
GMZ042>044-302030-
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 AM EDT THU OCT 30 2025
..SMALL CRAFT ADVISORY IN EFFECT
TODAY
NORTHWEST WINDS 20 TO 25 KNOTS, DECREASING TO NEAR 20
KNOTS LATE. SEAS 2 TO 4 FEET, OCCASIONALLY TO 5 FEET, EXCEPT 5 TO
7 FEET, OCCASIONALLY TO 9 FEET WEST OF COSGROVE SHOAL LIGHT.
NEARSHORE WATERS VERY ROUGH, BECOMING ROUGH. ISOLATED SHOWERS.
TONIGHT
NORTHWEST WINDS 15 TO 20 KNOTS EARLY, BECOMING
NORTHWEST TO NORTH 10 TO 15 KNOTS AFTER MIDNIGHT. SEAS 2 TO 4
FEET, OCCASIONALLY TO 5 FEET, SUBSIDING TO AROUND 2 FEET. WEST OF
COSGROVE SHOAL LIGHT, SEAS 4 TO 6 FEET, OCCASIONALLY TO 8 FEET,
SUBSIDING TO 3 TO 4 FEET. NEARSHORE WATERS CHOPPY, BECOMING A
LIGHT TO MODERATE CHOP. ISOLATED SHOWERS.
FRIDAY
NORTH TO NORTHEAST WINDS NEAR 10 KNOTS, DECREASING TO 5
TO 10 KNOTS. SEAS 1 TO 2 FEET, EXCEPT 3 TO 4 FEET, OCCASIONALLY
TO 5 FEET WEST OF COSGROVE SHOAL LIGHT. NEARSHORE WATERS A LIGHT
CHOP, BECOMING SMOOTH TO A LIGHT CHOP. ISOLATED SHOWERS.
FRIDAY NIGHT
NORTH TO NORTHEAST WINDS 5 TO 10 KNOTS,
INCREASING TO 10 TO 15 KNOTS AFTER MIDNIGHT. SEAS 1 TO 2 FEET,
EXCEPT 2 TO 3 FEET WEST OF COSGROVE SHOAL LIGHT. NEARSHORE WATERS
SMOOTH TO A LIGHT CHOP, BECOMING A LIGHT TO MODERATE CHOP.
ISOLATED SHOWERS.
SATURDAY
NORTHEAST WINDS 10 TO 15 KNOTS. SEAS 1 TO 2 FEET,
EXCEPT 2 TO 3 FEET WEST OF COSGROVE SHOAL LIGHT. NEARSHORE WATERS
A LIGHT TO MODERATE CHOP. ISOLATED SHOWERS.
SATURDAY NIGHT
NORTHEAST TO EAST WINDS NEAR 15 KNOTS. SEAS
2 TO 3 FEET. NEARSHORE WATERS A MODERATE CHOP. ISOLATED SHOWERS.
SUNDAY
NORTHEAST WINDS NEAR 15 KNOTS. SEAS 2 TO 3 FEET.
NEARSHORE WATERS A MODERATE CHOP. ISOLATED SHOWERS.
SUNDAY NIGHT
NORTHEAST WINDS NEAR 15 KNOTS. SEAS 2 TO 3 FEET,
EXCEPT 3 TO 4 FEET, OCCASIONALLY TO 5 FEET WEST OF COSGROVE SHOAL
LIGHT. NEARSHORE WATERS A MODERATE CHOP. SCATTERED SHOWERS.
MONDAY
NORTH TO NORTHEAST WINDS NEAR 15 KNOTS, BECOMING
NORTHWEST TO NORTH. SEAS 2 TO 3 FEET, EXCEPT 3 TO 4 FEET,
OCCASIONALLY TO 5 FEET WEST OF COSGROVE SHOAL LIGHT. NEARSHORE
WATERS A MODERATE CHOP. SCATTERED SHOWERS.
MONDAY NIGHT
NORTHWEST TO NORTH WINDS 15 TO 20 KNOTS, BECOMING
NORTH TO NORTHEAST. SEAS 2 TO 3 FEET. WEST OF COSGROVE SHOAL
LIGHT, SEAS 3 TO 5 FEET, OCCASIONALLY TO 6 FEET, BUILDING TO 5 TO
6 FEET, OCCASIONALLY TO 8 FEET. NEARSHORE WATERS CHOPPY.
SCATTERED SHOWERS.
GMZ052>055-072>075-302030-
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 AM EDT THU OCT 30 2025
..SMALL CRAFT ADVISORY IN EFFECT
TODAY
NORTHWEST WINDS 20 TO 25 KNOTS, DECREASING TO NEAR 20
KNOTS LATE. SEAS 5 TO 8 FEET, OCCASIONALLY TO 10 FEET. WAVE
DETAIL: NORTHWEST 7 FEET AT 6 SECONDS. ISOLATED SHOWERS.
TONIGHT
NORTHWEST WINDS 15 TO 20 KNOTS, BECOMING NORTHWEST TO
NORTH 10 TO 15 KNOTS AFTER MIDNIGHT. SEAS 5 TO 7 FEET,
OCCASIONALLY TO 9 FEET, SUBSIDING TO 4 TO 5 FEET, OCCASIONALLY TO
6 FEET. WAVE DETAIL: NORTHWEST 6 FEET AT 9 SECONDS AND NORTHEAST
1 FOOT AT 7 SECONDS, BECOMING WEST TO NORTHWEST 5 FEET AT 9
SECONDS AND NORTHEAST 2 FEET AT 7 SECONDS. ISOLATED SHOWERS.
FRIDAY
NORTHWEST TO NORTH WINDS NEAR 10 KNOTS, BECOMING
NORTH TO NORTHEAST. SEAS 3 TO 4 FEET, OCCASIONALLY TO 5 FEET.
WAVE DETAIL: WEST TO NORTHWEST 4 FEET AT 9 SECONDS AND NORTHEAST
2 FEET AT 7 SECONDS. ISOLATED SHOWERS.
FRIDAY NIGHT
NORTHEAST WINDS NEAR 10 KNOTS. SEAS SUBSIDING TO 2
TO 3 FEET. ISOLATED SHOWERS.
SATURDAY
NORTHEAST TO EAST WINDS 10 TO 15 KNOTS. SEAS AROUND
3 FEET. ISOLATED SHOWERS.
SATURDAY NIGHT
NORTHEAST TO EAST WINDS NEAR 15 KNOTS. SEAS
3 TO 4 FEET, OCCASIONALLY TO 5 FEET. ISOLATED SHOWERS.
SUNDAY
NORTHEAST WINDS 15 TO 20 KNOTS. SEAS 3 TO 5 FEET,
OCCASIONALLY TO 6 FEET. SCATTERED SHOWERS.
SUNDAY NIGHT
NORTHEAST WINDS 15 TO 20 KNOTS. SEAS 4 TO 6 FEET,
OCCASIONALLY TO 8 FEET. SCATTERED SHOWERS.
MONDAY
NORTH TO NORTHEAST WINDS NEAR 15 KNOTS. SEAS 4 TO
6 FEET, OCCASIONALLY TO 8 FEET. SCATTERED SHOWERS.
MONDAY NIGHT
NORTH WINDS 15 TO 20 KNOTS. SEAS 5 TO 7 FEET,
OCCASIONALLY TO 9 FEET. SCATTERED SHOWERS.
GMZ033-034-302030-
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 AM EDT THU OCT 30 2025
..SMALL CRAFT ADVISORY IN EFFECT
TODAY
NORTHWEST WINDS 20 TO 25 KNOTS, DECREASING TO NEAR 20
KNOTS LATE. SEAS 6 TO 8 FEET, OCCASIONALLY TO 10 FEET. WAVE
DETAIL: NORTHWEST 8 FEET AT 8 SECONDS. ISOLATED SHOWERS.
TONIGHT
NORTHWEST WINDS 15 TO 20 KNOTS, BECOMING NORTHWEST TO
NORTH 10 TO 15 KNOTS AFTER MIDNIGHT. SEAS 5 TO 7 FEET,
OCCASIONALLY TO 9 FEET, SUBSIDING TO 4 TO 5 FEET, OCCASIONALLY TO
6 FEET. WAVE DETAIL: WEST TO NORTHWEST 7 FEET AT 9 SECONDS.
ISOLATED SHOWERS.
FRIDAY
NORTH TO NORTHEAST WINDS 10 TO 15 KNOTS, DECREASING TO
NEAR 10 KNOTS. SEAS 3 TO 5 FEET, OCCASIONALLY TO 6 FEET. WAVE
DETAIL: WEST TO NORTHWEST 5 FEET AT 9 SECONDS. ISOLATED SHOWERS.
FRIDAY NIGHT
NORTH TO NORTHEAST WINDS 10 TO 15 KNOTS. SEAS
3 TO 4 FEET, OCCASIONALLY TO 5 FEET. ISOLATED SHOWERS.
SATURDAY
NORTHEAST WINDS 10 TO 15 KNOTS. SEAS SUBSIDING TO 2
TO 3 FEET. ISOLATED SHOWERS.
SATURDAY NIGHT
NORTHEAST WINDS 10 TO 15 KNOTS, INCREASING TO
NEAR 15 KNOTS. SEAS 2 TO 3 FEET. ISOLATED SHOWERS.
SUNDAY
NORTHEAST WINDS NEAR 15 KNOTS. SEAS BUILDING TO 2 TO 4
FEET, OCCASIONALLY TO 5 FEET. ISOLATED SHOWERS.
SUNDAY NIGHT
NORTHEAST WINDS NEAR 15 KNOTS. SEAS 3 TO 4 FEET,
OCCASIONALLY TO 5 FEET. ISOLATED SHOWERS.
MONDAY
NORTH WINDS INCREASING TO 15 TO 20 KNOTS. SEAS BUILDING
TO 4 TO 5 FEET, OCCASIONALLY TO 6 FEET. ISOLATED SHOWERS.
MONDAY NIGHT
NORTH WINDS 15 TO 20 KNOTS. SEAS BUILDING TO 5 TO
7 FEET, OCCASIONALLY TO 9 FEET. ISOLATED SHOWERS.
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