692  
FZUS52 KJAX 201326  
CWFJAX  
 
COASTAL WATERS FORECAST FOR NORTHEAST FLORIDA/SOUTHEAST GEORGIA  
NATIONAL WEATHER SERVICE JACKSONVILLE FL  
926 AM EDT WED AUG 20 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.  
 
AMZ400-210430-  
SYNOPSIS FOR ALTAMAHA SOUND GA TO FLAGLER BEACH FL OUT TO 60 NM-  
926 AM EDT WED AUG 20 2025  
   
SYNOPSIS  
 
NORTHEAST WINDS INCREASE AND SEAS CONTINUE TO BUILD TODAY AS  
HURRICANE ERIN TRACKS NORTH, REMAINING WELL OFFSHORE OF THE  
SOUTHEAST ATLANTIC COAST. ERIN WILL BEGIN TO TRACK NORTHEAST TONIGHT  
INTO THURSDAY, WITH A TRAILING FRONT ACROSS SOUTH GEORGIA. THIS  
FRONT WILL EDGE SOUTHWARD AND LINGER OVER THE LOCAL WATERS FRIDAY  
INTO THE WEEKEND, BRINGING AN INCREASE IN SHOWER AND THUNDERSTORMS.  
AN EXTENDED PERIOD OF SMALL CRAFT CONDITIONS WILL IMPACT THE LOCAL  
WATERS THROUGH LATE FRIDAY DUE TO LINGERING SWELLS. SEAS ARE  
EXPECTED TO LOWER BELOW SMALL CRAFT LEVELS THIS WEEKEND.  
 
   
GULF STREAM  
 
THE APPROXIMATE LOCATION OF THE WEST WALL OF THE GULF STREAM AS OF  
AUG 19, 2025 AT 1200 UTC...  
 
51 NAUTICAL MILES EAST OF FLAGLER BEACH.  
59 NAUTICAL MILES EAST OF SAINT AUGUSTINE BEACH.  
68 NAUTICAL MILES EAST OF JACKSONVILLE BEACH.  
81 NAUTICAL MILES EAST SOUTHEAST OF ST SIMONS ISLAND.  
 
THIS DATA COURTESY OF THE NAVAL OCEANOGRAPHIC OFFICE.  
 
 
 
AMZ450-452-454-210430-  
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-  
926 AM EDT WED AUG 20 2025  
   
..SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE THURSDAY NIGHT  
 
   
REST OF TODAY  
NORTH WINDS 15 TO 20 KNOTS. SEAS 8 TO 11 FEET,  
OCCASIONALLY TO 14 FEET. WAVE DETAIL: EAST 10 FEET AT 15 SECONDS  
AND NORTHEAST 5 FEET AT 7 SECONDS. INTRACOASTAL WATERS CHOPPY. A  
CHANCE OF SHOWERS WITH A SLIGHT CHANCE OF THUNDERSTORMS.    
TONIGHT  
NORTHWEST WINDS 5 TO 10 KNOTS. SEAS 8 TO 11 FEET,  
OCCASIONALLY TO 14 FEET. WAVE DETAIL: EAST 10 FEET AT 15 SECONDS  
AND NORTHEAST 4 FEET AT 8 SECONDS. INTRACOASTAL WATERS LIGHT  
CHOP. A SLIGHT CHANCE OF SHOWERS IN THE EVENING.    
THURSDAY  
NORTHWEST WINDS 5 TO 10 KNOTS, BECOMING SOUTH IN THE  
AFTERNOON. SEAS 5 TO 8 FEET, OCCASIONALLY TO 10 FEET. WAVE  
DETAIL: EAST 8 FEET AT 14 SECONDS AND EAST 3 FEET AT 8 SECONDS.  
INTRACOASTAL WATERS LIGHT CHOP. A CHANCE OF SHOWERS AND  
THUNDERSTORMS IN THE AFTERNOON.    
THURSDAY NIGHT  
SOUTHWEST WINDS AROUND 10 KNOTS, BECOMING WEST  
AFTER MIDNIGHT. SEAS 4 TO 6 FEET, OCCASIONALLY TO 8 FEET. WAVE  
DETAIL: EAST 6 FEET AT 12 SECONDS AND SOUTHEAST 2 FEET AT  
6 SECONDS. INTRACOASTAL WATERS LIGHT CHOP. A CHANCE OF SHOWERS. A  
CHANCE OF THUNDERSTORMS, MAINLY IN THE EVENING.    
FRIDAY  
SOUTHWEST WINDS 5 TO 10 KNOTS, BECOMING SOUTHEAST IN  
THE AFTERNOON. SEAS 4 TO 6 FEET, OCCASIONALLY TO 8 FEET. WAVE  
DETAIL: NORTHEAST 5 FEET AT 12 SECONDS. INTRACOASTAL WATERS LIGHT  
CHOP. A CHANCE OF SHOWERS AND THUNDERSTORMS IN THE MORNING, THEN  
SHOWERS WITH THUNDERSTORMS LIKELY IN THE AFTERNOON.    
FRIDAY NIGHT  
SOUTH WINDS 5 TO 10 KNOTS, BECOMING WEST AFTER  
MIDNIGHT. SEAS 3 TO 5 FEET, OCCASIONALLY TO 6 FEET. WAVE DETAIL:  
NORTHEAST 4 FEET AT 13 SECONDS. INTRACOASTAL WATERS LIGHT CHOP.  
SHOWERS WITH A CHANCE OF THUNDERSTORMS IN THE EVENING, THEN  
SHOWERS LIKELY WITH A SLIGHT CHANCE OF THUNDERSTORMS AFTER  
MIDNIGHT.    
SATURDAY  
EAST WINDS 5 TO 10 KNOTS, BECOMING SOUTHWEST. SEAS  
3 TO 5 FEET, OCCASIONALLY TO 6 FEET. INTRACOASTAL WATERS LIGHT  
CHOP. A SLIGHT CHANCE OF THUNDERSTORMS IN THE MORNING. SHOWERS.  
THUNDERSTORMS LIKELY IN THE AFTERNOON, THEN A CHANCE OF  
THUNDERSTORMS IN THE EVENING. A CHANCE OF SHOWERS WITH A SLIGHT  
CHANCE OF THUNDERSTORMS AFTER MIDNIGHT.    
SUNDAY  
WEST WINDS 5 TO 10 KNOTS. SEAS 2 TO 4 FEET,  
OCCASIONALLY TO 5 FEET. INTRACOASTAL WATERS LIGHT CHOP. A CHANCE  
OF SHOWERS WITH A SLIGHT CHANCE OF THUNDERSTORMS IN THE MORNING,  
THEN SHOWERS LIKELY IN THE AFTERNOON. A CHANCE OF THUNDERSTORMS  
THROUGH THE NIGHT. A CHANCE OF SHOWERS IN THE EVENING, THEN A  
SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS AFTER MIDNIGHT.  
 
WINDS AND WAVES HIGHER IN AND NEAR THUNDERSTORMS.  
 
 
 
AMZ470-472-474-210430-  
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-  
926 AM EDT WED AUG 20 2025  
   
..SMALL CRAFT ADVISORY IN EFFECT THROUGH SATURDAY MORNING  
 
   
REST OF TODAY  
NORTH WINDS 15 TO 20 KNOTS. SEAS 10 TO 14 FEET,  
OCCASIONALLY TO 18 FEET. WAVE DETAIL: SOUTHEAST 12 FEET AT  
15 SECONDS AND NORTHEAST 6 FEET AT 8 SECONDS. A CHANCE OF SHOWERS  
WITH A SLIGHT CHANCE OF THUNDERSTORMS.    
TONIGHT  
NORTHWEST WINDS 10 TO 15 KNOTS. SEAS 9 TO 13 FEET,  
OCCASIONALLY TO 17 FEET. WAVE DETAIL: EAST 12 FEET AT 15 SECONDS  
AND NORTHEAST 5 FEET AT 8 SECONDS. A SLIGHT CHANCE OF SHOWERS AND  
THUNDERSTORMS.    
THURSDAY  
NORTHWEST WINDS 10 TO 15 KNOTS, BECOMING SOUTHWEST  
5 TO 10 KNOTS IN THE AFTERNOON. SEAS 6 TO 9 FEET, OCCASIONALLY TO  
11 FEET. WAVE DETAIL: EAST 9 FEET AT 13 SECONDS AND EAST 3 FEET  
AT 8 SECONDS. A SLIGHT CHANCE OF THUNDERSTORMS. A SLIGHT CHANCE  
OF SHOWERS IN THE MORNING, THEN A CHANCE OF SHOWERS IN THE  
AFTERNOON.    
THURSDAY NIGHT  
SOUTHWEST WINDS 5 TO 10 KNOTS, BECOMING WEST  
AFTER MIDNIGHT. SEAS 5 TO 8 FEET, OCCASIONALLY TO 10 FEET. WAVE  
DETAIL: NORTHEAST 7 FEET AT 12 SECONDS AND SOUTHEAST 2 FEET AT  
6 SECONDS. A CHANCE OF SHOWERS AND THUNDERSTORMS.    
FRIDAY  
WEST WINDS 5 TO 10 KNOTS, BECOMING SOUTH IN THE  
AFTERNOON. SEAS 5 TO 7 FEET, OCCASIONALLY TO 9 FEET. WAVE DETAIL:  
NORTHEAST 7 FEET AT 12 SECONDS AND SOUTHEAST 2 FEET AT 5 SECONDS.  
SHOWERS LIKELY WITH A CHANCE OF THUNDERSTORMS IN THE MORNING,  
THEN SHOWERS WITH THUNDERSTORMS LIKELY IN THE AFTERNOON.    
FRIDAY NIGHT  
SOUTH WINDS 5 TO 10 KNOTS, BECOMING WEST AFTER  
MIDNIGHT. SEAS 5 TO 7 FEET, OCCASIONALLY TO 9 FEET. WAVE DETAIL:  
NORTHEAST 6 FEET AT 13 SECONDS AND SOUTHEAST 2 FEET AT 8 SECONDS.  
SHOWERS WITH A CHANCE OF THUNDERSTORMS.    
SATURDAY  
NORTHWEST WINDS 5 TO 10 KNOTS, BECOMING SOUTHWEST.  
SEAS 4 TO 6 FEET, OCCASIONALLY TO 8 FEET. A CHANCE OF  
THUNDERSTORMS. SHOWERS.   
SUNDAY  
WEST WINDS 5 TO 10 KNOTS. SEAS 3 TO 5 FEET,  
OCCASIONALLY TO 6 FEET. SHOWERS LIKELY. A CHANCE OF THUNDERSTORMS  
.  
 
WINDS AND SEAS HIGHER IN AND NEAR THUNDERSTORMS.  
 
 
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