493  
FZMY50 PGUM 210623  
SRFMY  
 
SURF ZONE FORECAST FOR THE MARIANA ISLANDS  
NATIONAL WEATHER SERVICE TIYAN GU  
406 PM CHST WED FEB 21 2018  
   
SYNOPSIS
 
 

 
 
GUZ001>004-212200-  
GUAM-ROTA-TINIAN-SAIPAN-  
406 PM CHST WED FEB 21 2018  
 
...HIGH SURF ADVISORY IN EFFECT UNTIL 6 AM CHST THURSDAY ALONG  
NORTH FACING REEFS...  
...HIGH RISK OF RIP CURRENTS THROUGH LATE TONIGHT ALONG NORTH  
FACING REEFS...  
   
TONIGHT
 
 
COASTAL WINDS............NORTHEAST AT 15 TO 20 MPH.  
SURF ALONG NORTH FACING REEFS............8 TO 10 FEET.  
SURF ALONG EAST FACING REEFS............6 TO 8 FEET.  
SURF ALONG SOUTH FACING REEFS............1 TO 3 FEET.  
SURF ALONG WEST FACING REEFS............4 TO 6 FEET.  
PRIMARY SWELL...............EAST AT 2 TO 5 FEET.  
PRIMARY PERIOD..............9 SECONDS.  
SECONDARY SWELL.............NORTH AT AROUND 5 FEET.  
SECONDARY PERIOD............12 SECONDS.  
 
RIP CURRENT RISK.....HIGH. POUNDING SURF WILL PRODUCE LIFE  
THREATENING RIP CURRENTS AT REEFS AND BEACHES.  
 
SEA SURFACE TEMPERATURE AT RITIDIAN BUOY...83 DEGREES.  
   
THURSDAY
 
 
COASTAL WINDS............NORTHEAST AT 15 TO 20 MPH.  
SURF ALONG NORTH FACING REEFS............6 TO 8 FEET.  
SURF ALONG EAST FACING REEFS............5 TO 7 FEET.  
SURF ALONG SOUTH FACING REEFS............1 TO 3 FEET.  
SURF ALONG WEST FACING REEFS............4 TO 6 FEET.  
PRIMARY SWELL...............EAST AT 2 TO 5 FEET.  
PRIMARY PERIOD..............9 SECONDS.  
SECONDARY SWELL.............NORTH AT AROUND 3 FEET.  
SECONDARY PERIOD............12 SECONDS.  
 
RIP CURRENT RISK.....MODERATE. WAVE CONDITIONS SUPPORT STRONGER OR  
MORE FREQUENT RIP CURRENTS. ALWAYS HAVE A  
FLOTATION DEVICE WITH YOU IN THE WATER.  
MAXIMUM AFTERNOON HEAT INDEX...........AROUND 99.  
   
OUTLOOK
 
SURF WILL FALL 1 TO 2 FEET ON NORTH FACING REEFS THURSDAY  
INTO THURSDAY NIGHT. SURF MAY RISE ABOUT A FOOT ON EAST FACING  
REEFS BY THE WEEKEND.  
 
TIDE INFORMATION FOR THE NEXT 24 HOURS...  
 
AT APRA HARBOR, GUAM...  
LOW TIDE 0.5 FEET AT 5:51 PM WEDNESDAY  
HIGH TIDE 2.0 FEET AT 11:46 PM WEDNESDAY  
LOW TIDE 0.8 FEET AT 5:39 AM THURSDAY  
HIGH TIDE 2.3 FEET AT 11:47 AM THURSDAY  
 
AT ROTA ISLAND...  
LOW TIDE 0.5 FEET AT 5:45 PM WEDNESDAY  
HIGH TIDE 1.9 FEET AT 11:43 PM WEDNESDAY  
LOW TIDE 0.8 FEET AT 5:33 AM THURSDAY  
HIGH TIDE 2.2 FEET AT 11:44 AM THURSDAY  
 
AT TINIAN ISLAND...  
LOW TIDE 0.2 FEET AT 5:28 PM WEDNESDAY  
HIGH TIDE 1.5 FEET AT 11:44 PM WEDNESDAY  
LOW TIDE 0.3 FEET AT 5:16 AM THURSDAY  
HIGH TIDE 1.7 FEET AT 11:45 AM THURSDAY  
 
AT TANAPAG HARBOR, SAIPAN...  
LOW TIDE 0.6 FEET AT 5:59 PM WEDNESDAY  
HIGH TIDE 1.7 FEET AT 12:08 AM THURSDAY  
LOW TIDE 0.9 FEET AT 5:49 AM THURSDAY  
HIGH TIDE 2.0 FEET AT 11:59 AM THURSDAY  
 

 
 
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