431
FZUS52 KJAX 180847
CWFJAX
COASTAL WATERS FORECAST FOR NORTHEAST FLORIDA/SOUTHEAST GEORGIA
NATIONAL WEATHER SERVICE JACKSONVILLE FL
447 AM EDT FRI SEP 18 2026
ATLANTIC COASTAL WATERS FROM ALTAMAHA SOUND GA TO FLAGLER BEACH
FL OUT TO 60 NM.
SEAS ARE PROVIDED AS A RANGE OF THE AVERAGE HEIGHT OF THE HIGHEST
1/3 OF THE WAVES, ALONG WITH THE OCCASIONAL HEIGHT OF THE AVERAGE
HIGHEST 1/10 OF THE WAVES.
AMZ400-190000-
SYNOPSIS FOR ALTAMAHA SOUND GA TO FLAGLER BEACH FL OUT TO 60 NM-
447 AM EDT FRI SEP 18 2026
SYNOPSIS
HIGH PRESSURE SITUATED OVER THE SOUTHEASTERN STATES WILL GRADUALLY
WEAKEN TODAY, WITH A WEAK COASTAL TROUGH POSITIONED OVER THE
NORTHEAST FLORIDA WATERS DEVELOPING SCATTERED SHOWERS AND POSSIBLY
AN EMBEDDED THUNDERSTORM THROUGH LATE THIS AFTERNOON, MOSTLY FOR THE
WATERS FROM ST. AUGUSTINE SOUTHWARD. WINDS AND SEAS SHOULD REMAIN
BELOW CAUTION LEVELS DURING THE NEXT SEVERAL DAYS THROUGHOUT OUR
LOCAL WATERS, AND SURFACE TROUGH AND DISTURBANCE ALOFT CROSSING THE
FLORIDA PENINSULA ON SATURDAY WILL EMERGE OVER THE EASTERN GULF ON
SUNDAY AND MONDAY. SHOWERS AND THUNDERSTORMS ARE EXPECTED TO
INCREASE BEGINNING LATE SATURDAY NIGHT, WITH ACTIVITY LIKELY
CONTINUING THROUGH AT LEAST EARLY NEXT WEEK. A STRONGER HIGH
PRESSURE CENTER MAY ATTEMPT TO WEDGE DOWN THE SOUTHEASTERN SEABOARD
LATER NEXT WEEK, POTENTIALLY RESULTING IN ANOTHER ROUND OF STRONGER
NORTHEASTERLY WINDS ACROSS OUR LOCAL WATERS.
GULF STREAM
THE APPROXIMATE LOCATION OF THE WEST WALL OF THE GULF STREAM AS OF
SEP 17, 2026 AT 0000 UTC...
54 NAUTICAL MILES EAST OF FLAGLER BEACH.
62 NAUTICAL MILES EAST OF SAINT AUGUSTINE BEACH.
74 NAUTICAL MILES EAST SOUTHEAST OF JACKSONVILLE BEACH.
71 NAUTICAL MILES EAST SOUTHEAST OF ST SIMONS ISLAND.
THIS DATA DERIVED FROM NCEP GLOBAL RTOFS MODEL.
AMZ450-452-454-190000-
COASTAL WATERS FROM ALTAMAHA SOUND TO FERNANDINA BEACH FL OUT
20 NM-
COASTAL WATERS FROM FERNANDINA BEACH TO ST. AUGUSTINE FL OUT
20 NM-
COASTAL WATERS FROM ST. AUGUSTINE TO FLAGLER BEACH FL OUT 20 NM-
447 AM EDT FRI SEP 18 2026
TODAY
NORTH WINDS 5 TO 10 KNOTS, BECOMING NORTHEAST 10 TO 15
KNOTS LATE THIS MORNING. SEAS 3 TO 4 FEET, OCCASIONALLY TO 5
FEET. WAVE DETAIL: EAST 4 FEET AT 7 SECONDS. INTRACOASTAL WATERS
BECOMING A LIGHT CHOP. A SLIGHT CHANCE OF SHOWERS THIS MORNING,
THEN A CHANCE OF SHOWERS WITH A SLIGHT CHANCE OF THUNDERSTORMS
THIS AFTERNOON.
TONIGHT
EAST WINDS 5 TO 10 KNOTS, BECOMING NORTH NORTHWEST
AFTER MIDNIGHT. SEAS 2 TO 4 FEET, OCCASIONALLY TO 5 FEET. WAVE
DETAIL: EAST 3 FEET AT 7 SECONDS. INTRACOASTAL WATERS MOSTLY
SMOOTH.
SATURDAY
NORTH WINDS 5 TO 10 KNOTS, BECOMING NORTHEAST AROUND
10 KNOTS DURING THE LATE MORNING. SEAS 2 TO 3 FEET. WAVE DETAIL:
EAST 2 FEET AT 7 SECONDS. INTRACOASTAL WATERS BECOMING A LIGHT
CHOP. A SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS.
SATURDAY NIGHT
EAST WINDS 5 TO 10 KNOTS. SEAS AROUND 2 FEET.
WAVE DETAIL: EAST 2 FEET AT 7 SECONDS. INTRACOASTAL WATERS MOSTLY
SMOOTH. A CHANCE OF SHOWERS WITH A SLIGHT CHANCE OF THUNDERSTORMS.
SUNDAY
NORTHEAST WINDS 5 TO 10 KNOTS, BECOMING EAST AROUND 10
KNOTS DURING THE AFTERNOON. SEAS AROUND 2 FEET. WAVE DETAIL: EAST
2 FEET AT 7 SECONDS AND EAST 2 FEET AT 11 SECONDS. INTRACOASTAL
WATERS BECOMING A LIGHT CHOP. SHOWERS AND THUNDERSTORMS LIKELY.
SUNDAY NIGHT
EAST WINDS 5 TO 10 KNOTS, BECOMING SOUTHEAST
AROUND 5 KNOTS AFTER MIDNIGHT. SEAS AROUND 2 FEET. WAVE DETAIL:
EAST 2 FEET AT 7 SECONDS AND EAST 2 FEET AT 11 SECONDS.
INTRACOASTAL WATERS SMOOTH. SHOWERS AND THUNDERSTORMS LIKELY.
MONDAY
EAST NORTHEAST WINDS 5 TO 10 KNOTS, BECOMING EAST AROUND
10 KNOTS DURING THE AFTERNOON. SEAS AROUND 2 FEET. WAVE DETAIL:
EAST 2 FEET AT 8 SECONDS. INTRACOASTAL WATERS BECOMING A LIGHT
CHOP. SHOWERS AND THUNDERSTORMS LIKELY.
MONDAY NIGHT
EAST SOUTHEAST WINDS AROUND 10 KNOTS, BECOMING
SOUTHEAST 5 TO 10 KNOTS AFTER MIDNIGHT. SEAS AROUND 2
FEET. INTRACOASTAL WATERS BECOMING MOSTLY SMOOTH. A CHANCE OF
SHOWERS AND THUNDERSTORMS.
TUESDAY
NORTHEAST WINDS 5 TO 10 KNOTS, BECOMING EAST DURING THE
AFTERNOON. SEAS AROUND 2 FEET. INTRACOASTAL WATERS MOSTLY SMOOTH.
SHOWERS AND THUNDERSTORMS LIKELY.
WINDS AND WAVES HIGHER IN AND NEAR THUNDERSTORMS.
AMZ470-472-474-190000-
WATERS FROM ALTAMAHA SOUND GA TO FERNANDINA BEACH FL FROM 20 TO
60 NM-
WATERS FROM FERNANDINA BEACH TO ST. AUGUSTINE FL FROM 20 TO 60 NM-
WATERS FROM ST. AUGUSTINE TO FLAGLER BEACH FL FROM 20 TO 60 NM-
447 AM EDT FRI SEP 18 2026
TODAY
NORTHEAST WINDS 10 TO 15 KNOTS. SEAS 3 TO 5 FEET,
OCCASIONALLY TO 6 FEET. WAVE DETAIL: NORTHEAST 5 FEET AT 7
SECONDS. A CHANCE OF SHOWERS WITH A SLIGHT CHANCE OF
THUNDERSTORMS.
TONIGHT
EAST WINDS 5 TO 10 KNOTS, BECOMING NORTHEAST AFTER
MIDNIGHT. SEAS 2 TO 4 FEET, OCCASIONALLY TO 5 FEET. WAVE DETAIL:
EAST 4 FEET AT 7 SECONDS. A SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS.
SATURDAY
NORTHEAST WINDS 5 TO 10 KNOTS. SEAS 2 TO 3 FEET. WAVE
DETAIL: EAST 3 FEET AT 7 SECONDS. A SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS.
SATURDAY NIGHT
EAST WINDS 5 TO 10 KNOTS. SEAS 2 TO 3 FEET.
WAVE DETAIL: SOUTHEAST 2 FEET AT 8 SECONDS AND EAST 2 FEET AT
8 SECONDS. A SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS IN THE
EVENING, THEN A CHANCE OF SHOWERS WITH A SLIGHT CHANCE OF
THUNDERSTORMS AFTER MIDNIGHT.
SUNDAY
NORTHEAST WINDS 5 TO 10 KNOTS. SEAS AROUND 2 FEET. WAVE
DETAIL: NORTHEAST 2 FEET AT 7 SECONDS AND SOUTHEAST 2 FEET AT
10 SECONDS. A CHANCE OF SHOWERS AND THUNDERSTORMS.
SUNDAY NIGHT
EAST WINDS 5 TO 10 KNOTS. SEAS AROUND 2 FEET.
WAVE DETAIL: EAST 2 FEET AT 9 SECONDS. SHOWERS AND THUNDERSTORMS
LIKELY.
MONDAY THROUGH TUESDAY
EAST NORTHEAST WINDS 5 TO 10 KNOTS,
BECOMING SOUTHEAST DURING THE AFTERNOON. SEAS 2 TO 3 FEET. SHOWERS
AND THUNDERSTORMS LIKELY.
WINDS AND SEAS HIGHER IN AND NEAR THUNDERSTORMS.
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