637  
FZHW52 PHFO 220116  
SRFHFO  
 
SURF ZONE FORECAST  
NATIONAL WEATHER SERVICE HONOLULU HI  
316 PM HST SAT OCT 21 2017  
 
HIZ005>011-221430-  
OAHU-  
316 PM HST SAT OCT 21 2017  
 
SURF ALONG NORTH FACING SHORES WILL BUILD TO 6 TO 9 FEET THROUGH  
TONIGHT, INCREASING TO 10 TO 14 FEET ON SUNDAY.  
 
SURF ALONG WEST FACING SHORES WILL BUILD TO 5 TO 8 FEET THROUGH  
TONIGHT, INCREASING TO 6 TO 10 FEET ON SUNDAY.  
 
SURF ALONG SOUTH FACING SHORES WILL BE 2 TO 4 FEET TONIGHT,  
INCREASING TO 3 TO 6 FEET ON SUNDAY.  
 
SURF ALONG EAST FACING SHORES WILL BE 5 TO 7 FEET TONIGHT AND 2 TO 4  
FEET ON SUNDAY.  
 
OUTLOOK THROUGH SATURDAY OCTOBER 28:  
THE NORTHWEST SWELL ARRIVING SUNDAY WILL PEAK SUNDAY NIGHT OR EARLY  
MONDAY WITH SURF NEAR ADVISORY LEVEL ALONG NORTH FACING SHORES. A  
LARGER NORTHWEST SWELL IS EXPECTED TO PRODUCE ADVISORY LEVEL SURF  
ALONG NORTH, AND POSSIBLY WEST, FACING SHORES TUESDAY AND WEDNESDAY.  
AN EVEN LARGER NORTHWEST SWELL IS POSSIBLE TOWARD THE END OF THE WEEK  
THAT MAY PRODUCE WARNING LEVEL SURF. THE SOUTH SWELL WILL PERSIST INTO  
MONDAY WITH SURF NEAR THE ADVISORY LEVEL.  
 
SURF HEIGHTS ARE FORECAST HEIGHTS OF THE FACE, OR FRONT, OF WAVES. THE  
SURF FORECAST IS BASED ON THE SIGNIFICANT WAVE HEIGHT, THE AVERAGE  
HEIGHT OF THE ONE THIRD LARGEST WAVES, AT THE LOCATIONS OF THE LARGEST  
BREAKERS. SOME WAVES MAY BE MORE THAN TWICE AS HIGH AS THE  
SIGNIFICANT WAVE HEIGHT. EXPECT TO ENCOUNTER RIP CURRENTS IN OR NEAR  
ANY SURF ZONE.  
 

 
 
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