478
FZUS52 KJAX 211145
CWFJAX
COASTAL WATERS FORECAST FOR NORTHEAST FLORIDA/SOUTHEAST GEORGIA
NATIONAL WEATHER SERVICE JACKSONVILLE FL
745 AM EDT WED OCT 21 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.
AMZ400-220245-
SYNOPSIS FOR ALTAMAHA SOUND GA TO FLAGLER BEACH FL OUT TO 60 NM-
745 AM EDT WED OCT 21 2026
SYNOPSIS
A TIGHT PRESSURE GRADIENT BETWEEN HIGH PRESSURE OVER THE EASTERN
STATES AND A STRONG LOW PRESSURE WELL OFFSHORE OVER THE WESTERN
ATLANTIC WILL CONTINUE TO SUPPORT HAZARDOUS MARINE CONDITIONS ACROSS
THE AREA WATERS THIS WEEK. ROUGH SEAS WILL CONTINUE TO SLOWLY
DIMINISH THROUGH EARLY FRIDAY MORNING. HOWEVER, SMALL CRAFT ADVISORY
LEVEL CONDITIONS WILL CONTINUE INTO MID TO LATE WEEK ESPECIALLY FOR
OFFSHORE WATERS. ANOTHER SURGE OF NORTHEAST WINDS TO GALE FORCE IS
EXPECTED TO DEVELOP LATE FRIDAY AND CONTINUE INTO THIS WEEKEND.
GULF STREAM
THE APPROXIMATE LOCATION OF THE WEST WALL OF THE GULF STREAM AS OF
OCT 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.
80 NAUTICAL MILES EAST SOUTHEAST OF ST SIMONS ISLAND.
THIS DATA DERIVED FROM NCEP GLOBAL RTOFS MODEL.
AMZ450-220245-
COASTAL WATERS FROM ALTAMAHA SOUND TO FERNANDINA BEACH FL OUT
20 NM-
745 AM EDT WED OCT 21 2026
...SMALL CRAFT EXERCISE CAUTION IN EFFECT UNTIL 4 PM EDT THIS
AFTERNOON...
REST OF TODAY
NORTHEAST WINDS 10 TO 15 KNOTS. SEAS 4 TO
6 FEET, OCCASIONALLY TO 8 FEET. WAVE DETAIL: EAST 6 FEET AT
12 SECONDS AND NORTHEAST 2 FEET AT 5 SECONDS. INTRACOASTAL WATERS
A MODERATE CHOP.
TONIGHT
NORTH WINDS 10 TO 15 KNOTS. SEAS 4 TO 5 FEET,
OCCASIONALLY TO 6 FEET. WAVE DETAIL: EAST 5 FEET AT 11 SECONDS.
INTRACOASTAL WATERS A MODERATE CHOP.
THURSDAY
NORTHEAST WINDS 10 TO 15 KNOTS. SEAS 4 TO 5 FEET,
OCCASIONALLY TO 6 FEET. WAVE DETAIL: EAST 5 FEET AT 12 SECONDS.
INTRACOASTAL WATERS A MODERATE CHOP.
THURSDAY NIGHT
NORTHEAST WINDS 5 TO 10 KNOTS, INCREASING TO
10 TO 15 KNOTS AFTER MIDNIGHT. SEAS 4 TO 5 FEET, OCCASIONALLY TO
6 FEET. WAVE DETAIL: EAST 5 FEET AT 13 SECONDS. INTRACOASTAL
WATERS A MODERATE CHOP.
FRIDAY
NORTHEAST WINDS 15 TO 20 KNOTS, INCREASING TO 25 TO
30 KNOTS IN THE AFTERNOON. SEAS 4 TO 5 FEET, OCCASIONALLY TO
6 FEET, BUILDING TO 5 TO 7 FEET, OCCASIONALLY TO 9 FEET IN THE
AFTERNOON. WAVE DETAIL: EAST 5 FEET AT 12 SECONDS AND NORTHEAST
4 FEET AT 5 SECONDS, BECOMING NORTHEAST 6 FEET AT 6 SECONDS AND
EAST 3 FEET AT 12 SECONDS. INTRACOASTAL WATERS VERY ROUGH.
FRIDAY NIGHT
NORTHEAST WINDS 25 TO 30 KNOTS. SEAS 7 TO
10 FEET, OCCASIONALLY TO 13 FEET. WAVE DETAIL: NORTHEAST 10 FEET
AT 8 SECONDS AND EAST 2 FEET AT 12 SECONDS. INTRACOASTAL WATERS
VERY ROUGH. A SLIGHT CHANCE OF SHOWERS IN THE EVENING, THEN A
CHANCE OF SHOWERS AFTER MIDNIGHT.
SATURDAY
NORTHEAST WINDS 25 TO 35 KNOTS. SEAS 9 TO 12 FEET,
OCCASIONALLY TO 15 FEET. INTRACOASTAL WATERS EXTREMELY ROUGH. A
CHANCE OF SHOWERS IN THE MORNING, THEN SHOWERS LIKELY WITH A
SLIGHT CHANCE OF THUNDERSTORMS IN THE AFTERNOON. A CHANCE OF
SHOWERS IN THE EVENING, THEN A SLIGHT CHANCE OF SHOWERS AFTER
MIDNIGHT.
SUNDAY
NORTHEAST WINDS 25 TO 30 KNOTS. SEAS 8 TO 11 FEET,
OCCASIONALLY TO 14 FEET. INTRACOASTAL WATERS VERY ROUGH. A CHANCE
OF SHOWERS THROUGH THE DAY, THEN A SLIGHT CHANCE OF SHOWERS
THROUGH THE NIGHT.
WINDS AND WAVES HIGHER IN AND NEAR THUNDERSTORMS.
AMZ452-454-220245-
COASTAL WATERS FROM FERNANDINA BEACH TO ST. AUGUSTINE FL OUT
20 NM-
COASTAL WATERS FROM ST. AUGUSTINE TO FLAGLER BEACH FL OUT 20 NM-
745 AM EDT WED OCT 21 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT
REST OF TODAY
NORTHEAST WINDS 15 TO 20 KNOTS. SEAS 6 TO
7 FEET, OCCASIONALLY TO 9 FEET. WAVE DETAIL: NORTHEAST 7 FEET AT
12 SECONDS. INTRACOASTAL WATERS CHOPPY.
TONIGHT
NORTHEAST WINDS 15 TO 20 KNOTS, BECOMING NORTH 10 TO
15 KNOTS AFTER MIDNIGHT. SEAS 5 TO 7 FEET, OCCASIONALLY TO
9 FEET. WAVE DETAIL: NORTHEAST 6 FEET AT 11 SECONDS. INTRACOASTAL
WATERS CHOPPY.
THURSDAY
NORTH WINDS 10 TO 15 KNOTS. SEAS 5 TO 6 FEET,
OCCASIONALLY TO 8 FEET. WAVE DETAIL: NORTHEAST 6 FEET AT
12 SECONDS. INTRACOASTAL WATERS A MODERATE CHOP.
THURSDAY NIGHT
NORTHEAST WINDS 15 TO 20 KNOTS. SEAS 5 TO
6 FEET, OCCASIONALLY TO 8 FEET. WAVE DETAIL: NORTHEAST 6 FEET AT
13 SECONDS AND NORTHEAST 3 FEET AT 5 SECONDS. INTRACOASTAL WATERS
CHOPPY.
FRIDAY
NORTHEAST WINDS 15 TO 20 KNOTS, INCREASING TO 25 TO
30 KNOTS IN THE AFTERNOON. SEAS 5 TO 6 FEET, OCCASIONALLY TO
8 FEET, BUILDING TO 6 TO 8 FEET, OCCASIONALLY TO 10 FEET IN THE
AFTERNOON. WAVE DETAIL: NORTHEAST 6 FEET AT 13 SECONDS AND
NORTHEAST 5 FEET AT 6 SECONDS, BECOMING NORTHEAST 7 FEET AT
6 SECONDS AND EAST 4 FEET AT 12 SECONDS. INTRACOASTAL WATERS VERY
ROUGH.
FRIDAY NIGHT
NORTHEAST WINDS 25 TO 30 KNOTS. SEAS 8 TO
11 FEET, OCCASIONALLY TO 14 FEET. WAVE DETAIL: NORTHEAST 11 FEET
AT 8 SECONDS AND EAST 3 FEET AT 12 SECONDS. INTRACOASTAL WATERS
VERY ROUGH. A CHANCE OF SHOWERS IN THE EVENING, THEN SHOWERS
LIKELY AFTER MIDNIGHT.
SATURDAY
NORTHEAST WINDS 25 TO 35 KNOTS. SEAS 10 TO 11 FEET,
OCCASIONALLY TO 14 FEET, BUILDING TO 10 TO 13 FEET, OCCASIONALLY
TO 17 FEET. INTRACOASTAL WATERS EXTREMELY ROUGH. A SLIGHT CHANCE
OF THUNDERSTORMS THROUGH THE DAY. SHOWERS, THEN A SLIGHT CHANCE
OF SHOWERS AFTER MIDNIGHT.
SUNDAY
NORTHEAST WINDS 25 TO 30 KNOTS. SEAS 10 TO 12 FEET,
OCCASIONALLY TO 15 FEET. INTRACOASTAL WATERS VERY ROUGH. A CHANCE
OF SHOWERS IN THE MORNING, THEN SHOWERS LIKELY IN THE AFTERNOON.
A CHANCE OF SHOWERS IN THE EVENING, THEN A SLIGHT CHANCE OF
SHOWERS AFTER MIDNIGHT.
WINDS AND WAVES HIGHER IN AND NEAR THUNDERSTORMS.
AMZ470-472-474-220245-
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-
745 AM EDT WED OCT 21 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE THURSDAY NIGHT
REST OF TODAY
NORTHEAST WINDS 15 TO 20 KNOTS. SEAS 7 TO
8 FEET, OCCASIONALLY TO 10 FEET. WAVE DETAIL: NORTHEAST 8 FEET AT
12 SECONDS.
TONIGHT
NORTH WINDS 10 TO 15 KNOTS. SEAS 6 TO 7 FEET,
OCCASIONALLY TO 9 FEET. WAVE DETAIL: NORTHEAST 7 FEET AT
11 SECONDS.
THURSDAY
NORTH WINDS AROUND 15 KNOTS. SEAS 6 TO 7 FEET,
OCCASIONALLY TO 9 FEET. WAVE DETAIL: NORTHEAST 7 FEET AT
12 SECONDS.
THURSDAY NIGHT
NORTHEAST WINDS 10 TO 15 KNOTS, INCREASING TO
15 TO 20 KNOTS AFTER MIDNIGHT. SEAS 6 TO 7 FEET, OCCASIONALLY TO
9 FEET. WAVE DETAIL: NORTHEAST 7 FEET AT 13 SECONDS.
FRIDAY
NORTHEAST WINDS 15 TO 20 KNOTS, INCREASING TO 20 TO
25 KNOTS IN THE AFTERNOON. SEAS 6 TO 8 FEET, OCCASIONALLY TO
10 FEET. WAVE DETAIL: NORTHEAST 7 FEET AT 6 SECONDS AND NORTHEAST
7 FEET AT 12 SECONDS. A SLIGHT CHANCE OF SHOWERS IN THE
AFTERNOON.
FRIDAY NIGHT
NORTHEAST WINDS 25 TO 30 KNOTS. SEAS 8 TO
11 FEET, OCCASIONALLY TO 14 FEET. WAVE DETAIL: NORTHEAST 11 FEET
AT 8 SECONDS AND NORTHEAST 4 FEET AT 12 SECONDS. A SLIGHT CHANCE
OF THUNDERSTORMS. SHOWERS.
SATURDAY
NORTHEAST WINDS 25 TO 35 KNOTS, BECOMING AROUND
30 KNOTS. SEAS 9 TO 13 FEET, OCCASIONALLY TO 17 FEET, BUILDING TO
12 TO 13 FEET, OCCASIONALLY TO 17 FEET. SHOWERS. A SLIGHT CHANCE
OF THUNDERSTORMS THROUGH THE NIGHT, THEN A CHANCE OF SHOWERS
AFTER MIDNIGHT.
SUNDAY
NORTHEAST WINDS 25 TO 30 KNOTS. SEAS 11 TO 13 FEET,
OCCASIONALLY TO 17 FEET. A CHANCE OF SHOWERS IN THE MORNING, THEN
SHOWERS LIKELY IN THE AFTERNOON. A CHANCE OF SHOWERS THROUGH THE
NIGHT.
WINDS AND SEAS HIGHER IN AND NEAR THUNDERSTORMS.
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