046
FZUS52 KJAX 180455
CWFJAX
COASTAL WATERS FORECAST FOR NORTHEAST FLORIDA/SOUTHEAST GEORGIA
NATIONAL WEATHER SERVICE JACKSONVILLE FL
1255 AM EDT THU SEP 18 2025
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.
AMZ400-181900-
SYNOPSIS FOR ALTAMAHA SOUND GA TO FLAGLER BEACH FL OUT TO 60 NM-
1255 AM EDT THU SEP 18 2025
SYNOPSIS
WEAK HIGH PRESSURE WILL REMAIN SITUATED OVER OUR REGION TODAY.
STRONG HIGH PRESSURE WILL THEN BUILD SOUTHEASTWARD FROM HUDSON BAY,
CANADA ON FRIDAY, WITH THIS FEATURE THEN SHIFTING OVER NEW ENGLAND
BY SATURDAY AS IT WEDGES DOWN THE SOUTHEASTERN SEABOARD. COASTAL
TROUGHING WILL SHARPEN OVER OUR NEAR SHORE WATERS THIS WEEKEND,
RESULTING IN STRENGTHENING ONSHORE WINDS, BUILDING SEAS, AND AN
INCREASING COVERAGE OF SHOWERS AND THUNDERSTORMS. SMALL CRAFT
ADVISORY CONDITIONS ARE POSSIBLE THIS WEEKEND AND EARLY NEXT WEEK.
GULF STREAM
THE APPROXIMATE LOCATION OF THE WEST WALL OF THE GULF STREAM AS OF
SEP 16, 2025 AT 1200 UTC...
44 NAUTICAL MILES EAST OF FLAGLER BEACH.
50 NAUTICAL MILES EAST NORTHEAST OF SAINT AUGUSTINE BEACH.
56 NAUTICAL MILES EAST OF JACKSONVILLE BEACH.
71 NAUTICAL MILES EAST SOUTHEAST OF ST SIMONS ISLAND.
THIS DATA COURTESY OF THE NAVAL OCEANOGRAPHIC OFFICE.
AMZ450-452-454-181900-
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-
1255 AM EDT THU SEP 18 2025
REST OF TONIGHT
SOUTHEAST WINDS 5 TO 10 KNOTS. SEAS 2 TO
3 FEET. WAVE DETAIL: EAST 3 FEET AT 9 SECONDS AND SOUTHEAST
2 FEET AT 5 SECONDS. INTRACOASTAL WATERS LIGHT CHOP. A SLIGHT
CHANCE OF SHOWERS LATE THIS EVENING.
THURSDAY
NORTHEAST WINDS 5 TO 10 KNOTS, BECOMING EAST 10 TO
15 KNOTS IN THE AFTERNOON. SEAS 2 TO 3 FEET. WAVE DETAIL: EAST
2 FEET AT 8 SECONDS. INTRACOASTAL WATERS A MODERATE CHOP. A
SLIGHT CHANCE OF SHOWERS. A SLIGHT CHANCE OF THUNDERSTORMS IN THE
AFTERNOON.
THURSDAY NIGHT
EAST WINDS 10 TO 15 KNOTS, DIMINISHING TO 5 TO
10 KNOTS AFTER MIDNIGHT. SEAS 2 TO 3 FEET. WAVE DETAIL: SOUTHEAST
2 FEET AT 5 SECONDS AND EAST 2 FEET AT 8 SECONDS. INTRACOASTAL
WATERS A MODERATE CHOP. A SLIGHT CHANCE OF SHOWERS AFTER
MIDNIGHT.
FRIDAY
NORTHEAST WINDS 10 TO 15 KNOTS. SEAS 2 TO 4 FEET,
OCCASIONALLY TO 5 FEET. WAVE DETAIL: EAST 3 FEET AT 5 SECONDS AND
EAST 2 FEET AT 8 SECONDS. INTRACOASTAL WATERS A MODERATE CHOP. A
SLIGHT CHANCE OF SHOWERS. A SLIGHT CHANCE OF THUNDERSTORMS IN THE
AFTERNOON.
FRIDAY NIGHT
NORTHEAST WINDS 10 TO 15 KNOTS. SEAS 3 TO 4 FEET,
OCCASIONALLY TO 5 FEET. WAVE DETAIL: EAST 3 FEET AT 5 SECONDS AND
EAST 3 FEET AT 8 SECONDS. INTRACOASTAL WATERS A MODERATE CHOP. A
SLIGHT CHANCE OF SHOWERS. A SLIGHT CHANCE OF THUNDERSTORMS AFTER
MIDNIGHT.
SATURDAY
NORTHEAST WINDS 15 TO 20 KNOTS. SEAS 3 TO 5 FEET,
OCCASIONALLY TO 6 FEET. WAVE DETAIL: NORTHEAST 4 FEET AT
5 SECONDS AND EAST 4 FEET AT 8 SECONDS. INTRACOASTAL WATERS
CHOPPY. A CHANCE OF SHOWERS. A SLIGHT CHANCE OF THUNDERSTORMS IN
THE MORNING, THEN A CHANCE OF THUNDERSTORMS IN THE AFTERNOON.
SATURDAY NIGHT
NORTHEAST WINDS 15 TO 20 KNOTS. SEAS 4 TO
5 FEET, OCCASIONALLY TO 6 FEET. INTRACOASTAL WATERS CHOPPY. A
SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS.
SUNDAY
NORTHEAST WINDS 15 TO 20 KNOTS. SEAS 4 TO 6 FEET,
OCCASIONALLY TO 8 FEET. INTRACOASTAL WATERS CHOPPY. A SLIGHT
CHANCE OF THUNDERSTORMS IN THE MORNING. A CHANCE OF SHOWERS
THROUGH THE DAY. A CHANCE OF THUNDERSTORMS IN THE AFTERNOON. A
SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS THROUGH THE NIGHT.
MONDAY
EAST WINDS 10 TO 15 KNOTS. SEAS 3 TO 5 FEET,
OCCASIONALLY TO 6 FEET. INTRACOASTAL WATERS A MODERATE CHOP. A
SLIGHT CHANCE OF THUNDERSTORMS IN THE MORNING. A CHANCE OF
SHOWERS THROUGH THE DAY. A CHANCE OF THUNDERSTORMS IN THE
AFTERNOON, THEN A SLIGHT CHANCE OF SHOWERS IN THE EVENING. A
SLIGHT CHANCE OF THUNDERSTORMS THROUGH THE NIGHT. A CHANCE OF
SHOWERS AFTER MIDNIGHT.
WINDS AND WAVES HIGHER IN AND NEAR THUNDERSTORMS.
AMZ470-472-474-181900-
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-
1255 AM EDT THU SEP 18 2025
REST OF TONIGHT
SOUTHEAST WINDS 5 TO 10 KNOTS. SEAS AROUND
3 FEET. WAVE DETAIL: NORTHEAST 3 FEET AT 9 SECONDS AND SOUTHEAST
2 FEET AT 5 SECONDS. A CHANCE OF SHOWERS WITH A SLIGHT CHANCE OF
THUNDERSTORMS.
THURSDAY
EAST WINDS 5 TO 10 KNOTS, INCREASING TO 10 TO
15 KNOTS IN THE AFTERNOON. SEAS AROUND 3 FEET. WAVE DETAIL: EAST
3 FEET AT 8 SECONDS AND SOUTHEAST 2 FEET AT 5 SECONDS. A SLIGHT
CHANCE OF THUNDERSTORMS. A SLIGHT CHANCE OF SHOWERS IN THE
MORNING, THEN A CHANCE OF SHOWERS IN THE AFTERNOON.
THURSDAY NIGHT
EAST WINDS 10 TO 15 KNOTS, DIMINISHING TO 5 TO
10 KNOTS AFTER MIDNIGHT. SEAS AROUND 3 FEET. WAVE DETAIL: EAST
3 FEET AT 8 SECONDS AND SOUTHEAST 2 FEET AT 5 SECONDS. A SLIGHT
CHANCE OF THUNDERSTORMS. A SLIGHT CHANCE OF SHOWERS IN THE
EVENING, THEN A CHANCE OF SHOWERS AFTER MIDNIGHT.
FRIDAY
NORTHEAST WINDS 10 TO 15 KNOTS. SEAS 3 TO 4 FEET,
OCCASIONALLY TO 5 FEET. WAVE DETAIL: EAST 3 FEET AT 7 SECONDS. A
CHANCE OF SHOWERS. A SLIGHT CHANCE OF THUNDERSTORMS IN THE
MORNING, THEN A CHANCE OF THUNDERSTORMS IN THE AFTERNOON.
FRIDAY NIGHT
NORTHEAST WINDS 10 TO 15 KNOTS. SEAS 3 TO 4 FEET,
OCCASIONALLY TO 5 FEET. WAVE DETAIL: EAST 4 FEET AT 7 SECONDS. A
SLIGHT CHANCE OF THUNDERSTORMS. A SLIGHT CHANCE OF SHOWERS IN THE
EVENING, THEN A CHANCE OF SHOWERS AFTER MIDNIGHT.
SATURDAY AND SATURDAY NIGHT
NORTHEAST WINDS 15 TO 20 KNOTS.
SEAS 4 TO 5 FEET, OCCASIONALLY TO 6 FEET. WAVE DETAIL: EAST
5 FEET AT 7 SECONDS. A CHANCE OF SHOWERS AND THUNDERSTORMS.
SUNDAY THROUGH MONDAY
EAST WINDS 15 TO 20 KNOTS. SEAS 4 TO
6 FEET, OCCASIONALLY TO 8 FEET. A CHANCE OF SHOWERS AND
THUNDERSTORMS.
WINDS AND SEAS HIGHER IN AND NEAR THUNDERSTORMS.
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