709  
FZMY50 PGUM 200540  
SRFMY  
 
SURF ZONE FORECAST FOR THE MARIANA ISLANDS  
NATIONAL WEATHER SERVICE TIYAN GU  
340 PM CHST WED MAR 20 2019  
   
SYNOPSIS
 
THE RISK OF RIP CURRENTS WILL REMAIN HIGH ALONG EAST  
FACING REEFS TONIGHT AND TURSDAY, BUT MAY DROP TO MODERATE FRIDAY.  
 

 
 
GUZ001>004-202045-  
GUAM-ROTA-TINIAN-SAIPAN-  
340 PM CHST WED MAR 20 2019  
 
...HIGH RISK OF RIP CURRENTS THROUGH FRIDAY ALONG EAST FACING  
REEFS...  
   
TONIGHT AND THURSDAY
 
 
COASTAL WINDS............NORTHEAST AT 10 TO 15 MPH.  
SURF ALONG NORTH FACING REEFS............4 TO 6 FEET.  
SURF ALONG EAST FACING REEFS............7 TO 9 FEET.  
SURF ALONG SOUTH FACING REEFS............2 TO 4 FEET.  
SURF ALONG WEST FACING REEFS............1 TO 3 FEET.  
PRIMARY SWELL...............EAST AT 5 TO 7 FEET.  
PRIMARY PERIOD..............10 SECONDS.  
SECONDARY SWELL...............NORTH AT AROUND 2 FEET.  
SECONDARY PERIOD..............12 SECONDS.  
 
RIP CURRENT RISK.....HIGH. LARGE WAVES WILL PRODUCE STRONG RIP  
CURRENTS, ESPECIALLY ALONG NARROW REEFS AND  
BEACHES. IF CAUGHT IN A RIP CURRENT, SWIM  
PARALLEL TO THE BEACH RATHER THAN AGAINST THE  
CURRENT.  
 
SEA SURFACE TEMPERATURE AT RITIDIAN BUOY...82 DEGREES.  
MAXIMUM AFTERNOON HEAT INDEX...........AROUND 97.  
   
OUTLOOK
 
LITTLE CHANGE THURSDAY NIGHT, BUT SURF MAY DROP ABOUT A  
FOOT ALONG EAST AND NORTH FACING REEFS ON FRIDAY, BRINGING THE RISK  
OF RIP CURRENTS DOWN TO MODERATE.  
 
TIDE INFORMATION FOR THE NEXT 24 HOURS...  
 
AT APRA HARBOR, GUAM...  
HIGH TIDE 2.6 FEET AT 6:56 PM WEDNESDAY  
LOW TIDE -0.3 FEET AT 1:41 AM THURSDAY  
HIGH TIDE 2.6 FEET AT 8:07 AM THURSDAY  
LOW TIDE 0.6 FEET AT 2:09 PM THURSDAY  
 
AT ROTA ISLAND...  
HIGH TIDE 2.4 FEET AT 6:53 PM WEDNESDAY  
LOW TIDE -0.3 FEET AT 1:35 AM THURSDAY  
HIGH TIDE 2.5 FEET AT 8:04 AM THURSDAY  
LOW TIDE 0.6 FEET AT 2:03 PM THURSDAY  
 
AT TINIAN ISLAND...  
HIGH TIDE 1.9 FEET AT 6:54 PM WEDNESDAY  
LOW TIDE -0.1 FEET AT 1:18 AM THURSDAY  
HIGH TIDE 1.9 FEET AT 8:05 AM THURSDAY  
LOW TIDE 0.2 FEET AT 1:46 PM THURSDAY  
 
AT TANAPAG HARBOR, SAIPAN...  
HIGH TIDE 2.3 FEET AT 7:03 PM WEDNESDAY  
LOW TIDE -0.1 FEET AT 1:41 AM THURSDAY  
HIGH TIDE 2.3 FEET AT 8:12 AM THURSDAY  
LOW TIDE 0.6 FEET AT 2:07 PM THURSDAY  
 

 
 
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