438  
FZNT26 KNHC 210810  
OFFN05  
 
NAVTEX MARINE FORECAST  
NWS NATIONAL HURRICANE CENTER MIAMI, FL  
410 AM EDT THU AUG 21 2025  
 
...PLEASE REFER TO COASTAL WATERS FORECASTS (CWF) AVAILABLE  
THROUGH NOAA WEATHER RADIO AND OTHER MEANS FOR DETAILED  
COASTAL WATERS FORECASTS...  
   
SYNOPSIS  
IN THE WAKE OF HURRICANE ERIN, CENTRAL ATLANTIC HIGH  
PRESSURE WILL BUILD WEST-SOUTHWESTWARD TOWARD THE BAHAMAS. THIS  
WILL ALLOW FOR THE NORMAL TRADE WIND FLOW TO RETURN TO THE  
REGIONAL WATERS THROUGH THE PERIOD. LONG-PERIOD NORTHERLY SWELL  
GENERATED BY ERIN WILL BEGIN TO IMPACT THE ATLANTIC WATERS ON  
FRI. OTHERWISE, SHOWER AND THUNDERSTORM ACTIVITY HAS BECOME A  
BIT MORE CONCENTRATED IN ASSOCIATION WITH A TROPICAL WAVE LOCATED  
A FEW HUNDRED MILES EAST OF THE LEEWARD ISLANDS. ENVIRONMENTAL  
CONDITIONS APPEAR CONDUCIVE FOR FURTHER DEVELOPMENT OF THIS  
SYSTEM, AND A TROPICAL DEPRESSION IS LIKELY TO FORM THIS WEEKEND  
WHILE IT MOVES NEAR OR TO THE NORTH OF THE NORTHERN LEEWARD  
ISLANDS.  
 
SAN JUAN ATLANTIC WATERS  
   
TODAY  
E WINDS 10 TO 15 KT. SEAS 5 TO 6 FT. ISOLATED SHOWERS.    
TONIGHT  
NE TO E WINDS 10 TO 15 KT. SEAS 5 TO 6 FT. ISOLATED  
SHOWERS.    
FRI  
NE TO E WINDS 10 TO 15 KT. SEAS 5 TO 6 FT. ISOLATED  
SHOWERS.    
FRI NIGHT  
NE TO E WINDS 5 TO 10 KT. SEAS 5 TO 6 FT IN NW TO N  
SWELL. ISOLATED SHOWERS.    
SAT  
E TO SE WINDS 5 TO 10 KT. SEAS 5 TO 7 FT IN NW TO N  
SWELL.    
SAT NIGHT  
SE WINDS 5 TO 10 KT. SEAS 6 TO 8 FT IN N SWELL.    
SUN  
E TO SE WINDS 10 TO 15 KT. SEAS 6 TO 8 FT IN N SWELL.    
SUN NIGHT  
E WINDS 10 TO 15 KT. SEAS 7 TO 8 FT IN N SWELL.    
MON  
E WINDS 15 KT. SEAS 7 TO 8 FT IN N TO NE SWELL.    
MON NIGHT  
E WINDS 15 KT. SEAS 7 TO 8 FT IN N TO NE SWELL.  
 
SAN JUAN CARIBBEAN WATERS  
   
TODAY  
E WINDS 10 TO 15 KT. SEAS 4 TO 5 FT. ISOLATED SHOWERS.    
TONIGHT  
NE TO E WINDS 15 KT. SEAS 3 TO 5 FT. ISOLATED SHOWERS.    
FRI  
NE TO E WINDS 10 TO 15 KT. SEAS 3 TO 5 FT. ISOLATED  
SHOWERS.    
FRI NIGHT  
E WINDS 10 TO 15 KT. SEAS 3 TO 5 FT. SCATTERED  
SHOWERS AND ISOLATED THUNDERSTORMS.    
SAT  
SE WINDS 10 TO 15 KT. SEAS 3 TO 5 FT.    
SAT NIGHT  
E TO SE WINDS 10 TO 15 KT. SEAS 3 TO 5 FT.    
SUN  
E WINDS 10 TO 15 KT. SEAS 3 TO 5 FT.    
SUN NIGHT  
E WINDS 15 KT. SEAS 4 TO 6 FT.    
MON  
E WINDS 15 KT. SEAS 5 TO 6 FT.    
MON NIGHT  
NE TO E WINDS 15 TO 20 KT. SEAS 5 TO 7 FT.  
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