049
FZUS52 KJAX 210039
CWFJAX
COASTAL WATERS FORECAST FOR NORTHEAST FLORIDA/SOUTHEAST GEORGIA
NATIONAL WEATHER SERVICE JACKSONVILLE FL
839 PM EDT THU AUG 20 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.
AMZ400-211545-
SYNOPSIS FOR ALTAMAHA SOUND GA TO FLAGLER BEACH FL OUT TO 60 NM-
839 PM EDT THU AUG 20 2026
SYNOPSIS
WEAK HIGH PRESSURE TO THE WEST OVER THE NORTHERN GULF WATERS WILL
REMAIN THROUGH THE WEEKEND INTO EARLY NEXT WEEK AND CONTINUE A WEST
TO SOUTHWESTERLY FLOW OVER THE WATERS. THE ATLANTIC SEABREEZE WILL
DEVELOP EACH AFTERNOON AND MOVE SLOWLY INLAND, SHIFTING WINDS TO
SOUTH SOUTHEASTERLY AND THEN SOUTHERLY OVERNIGHT AS WIND SPEEDS
APPROACH CAUTION LEVELS IN THE EARLY EVENING AND DIMINISHING LATE
EVENING. A COUPLE OF COLD FRONT WILL MOVE INTO THE SOUTHEAST STATES
AND STALL NORTH OF THE AREA WATERS THROUGH EARLY NEXT WEEK.
SCATTERED SHOWERS AND THUNDERSTORMS WILL DEVELOP AND IMPACT THE NEAR
SHORE WATERS ADJACENT TO NORTHEAST FLORIDA THIS AFTERNOON INT EARLY
EVENING. COVERAGE OF THUNDERSTORMS WILL INCREASE IN THE AFTERNOON
AND EARLY EVENING HOURS OVER THE LOCAL WATERS ON FRIDAY AND
SATURDAY. COVERAGE OF AFTERNOON AND EVENING THUNDERSTORMS WILL
DECREASE SUNDAY INTO MONDAY WITH MORE ISOLATED OR WIDELY SCATTERED
THUNDERSTORMS.
GULF STREAM
THE APPROXIMATE LOCATION OF THE WEST WALL OF THE GULF STREAM AS OF
AUG 20, 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.
76 NAUTICAL MILES EAST SOUTHEAST OF ST SIMONS ISLAND.
THIS DATA DERIVED FROM NCEP GLOBAL RTOFS MODEL.
AMZ450-452-454-211545-
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-
839 PM EDT THU AUG 20 2026
REST OF TONIGHT
SOUTH WINDS 10 TO 15 KNOTS, BECOMING SOUTHWEST
5 TO 10 KNOTS. SEAS 2 TO 3 FEET. WAVE DETAIL: SOUTH 2 FEET AT
4 SECONDS. INTRACOASTAL WATERS A MODERATE CHOP.
FRIDAY
SOUTH WINDS 5 TO 10 KNOTS, INCREASING TO 10 TO 15 KNOTS
IN THE AFTERNOON. SEAS 2 TO 3 FEET. WAVE DETAIL: SOUTHEAST 2 FEET
AT 4 SECONDS. INTRACOASTAL WATERS A MODERATE CHOP. A SLIGHT
CHANCE OF SHOWERS AND THUNDERSTORMS IN THE AFTERNOON.
FRIDAY NIGHT
SOUTHWEST WINDS 10 TO 15 KNOTS. SEAS 2 TO 3 FEET.
WAVE DETAIL: SOUTH 3 FEET AT 4 SECONDS. INTRACOASTAL WATERS A
MODERATE CHOP. A SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS IN
THE EVENING.
SATURDAY
SOUTHWEST WINDS 10 TO 15 KNOTS. SEAS 2 TO 3 FEET.
WAVE DETAIL: SOUTH 2 FEET AT 5 SECONDS. INTRACOASTAL WATERS A
MODERATE CHOP. SHOWERS LIKELY WITH A CHANCE OF THUNDERSTORMS IN
THE AFTERNOON.
SATURDAY NIGHT
SOUTHWEST WINDS 10 TO 15 KNOTS. SEAS 2 TO
3 FEET. WAVE DETAIL: SOUTH 2 FEET AT 5 SECONDS. INTRACOASTAL
WATERS A MODERATE CHOP. A CHANCE OF SHOWERS AND THUNDERSTORMS,
MAINLY IN THE EVENING.
SUNDAY AND SUNDAY NIGHT
SOUTHWEST WINDS 10 TO 15 KNOTS. SEAS
2 TO 3 FEET. WAVE DETAIL: SOUTH 2 FEET AT 5 SECONDS. INTRACOASTAL
WATERS A MODERATE CHOP. A SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS.
MONDAY THROUGH TUESDAY
SOUTH WINDS 10 TO 15 KNOTS. SEAS 2 TO
3 FEET. INTRACOASTAL WATERS A MODERATE CHOP. A SLIGHT CHANCE OF
SHOWERS AND THUNDERSTORMS.
WINDS AND WAVES HIGHER IN AND NEAR THUNDERSTORMS.
AMZ470-472-474-211545-
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-
839 PM EDT THU AUG 20 2026
REST OF TONIGHT
SOUTHWEST WINDS 5 TO 10 KNOTS. SEAS 2 TO
3 FEET. WAVE DETAIL: SOUTH 2 FEET AT 4 SECONDS AND EAST 2 FEET AT
8 SECONDS.
FRIDAY
SOUTHWEST WINDS 5 TO 10 KNOTS, BECOMING SOUTH 10 TO
15 KNOTS IN THE AFTERNOON. SEAS 2 TO 3 FEET. WAVE DETAIL: SOUTH
2 FEET AT 3 SECONDS AND EAST 2 FEET AT 8 SECONDS.
FRIDAY NIGHT
SOUTHWEST WINDS 10 TO 15 KNOTS. SEAS AROUND
3 FEET. WAVE DETAIL: SOUTH 3 FEET AT 4 SECONDS AND EAST 2 FEET AT
8 SECONDS. A SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS.
SATURDAY
SOUTHWEST WINDS 10 TO 15 KNOTS. SEAS 2 TO 3 FEET.
WAVE DETAIL: SOUTH 3 FEET AT 5 SECONDS AND EAST 2 FEET AT
8 SECONDS. A CHANCE OF SHOWERS AND THUNDERSTORMS IN THE
AFTERNOON.
SATURDAY NIGHT
SOUTHWEST WINDS 10 TO 15 KNOTS. SEAS AROUND
3 FEET. WAVE DETAIL: SOUTH 3 FEET AT 4 SECONDS. A CHANCE OF
SHOWERS. A CHANCE OF THUNDERSTORMS, MAINLY IN THE EVENING.
SUNDAY AND SUNDAY NIGHT
SOUTHWEST WINDS 10 TO 15 KNOTS. SEAS
2 TO 3 FEET. WAVE DETAIL: SOUTHWEST 3 FEET AT 4 SECONDS. A SLIGHT
CHANCE OF SHOWERS AND THUNDERSTORMS.
MONDAY
SOUTH WINDS 5 TO 10 KNOTS, INCREASING TO 10 TO
15 KNOTS. SEAS 2 TO 3 FEET. A SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS THROUGH THE NIGHT.
TUESDAY
SOUTH WINDS 5 TO 10 KNOTS. SEAS 2 TO 3 FEET. A SLIGHT
CHANCE OF SHOWERS AND THUNDERSTORMS THROUGH THE DAY. A CHANCE OF
THUNDERSTORMS IN THE EVENING. A CHANCE OF SHOWERS THROUGH THE
NIGHT. A SLIGHT CHANCE OF THUNDERSTORMS AFTER MIDNIGHT.
WINDS AND SEAS HIGHER IN AND NEAR THUNDERSTORMS.
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