771  
FZPQ50 PGUM 011858  
SRFGUM  
 
SURF ZONE FORECAST FOR THE MARIANA ISLANDS  
NATIONAL WEATHER SERVICE TIYAN GU  
458 AM CHST WED APR 2 2025  
   
DISCUSSION  
A MODERATE RISK OF RIP CURRENTS WILL CONTINUE ALONG  
WEST FACING REEFS THROUGH TONIGHT, THEN LIKELY BECOMING HIGH ON  
THURSDAY AS THE TRADE SWELL INCREASES. A MODERATE RISK WILL CONTINUE  
ALONG NORTH FACING REEFS. A LONG PERIOD NORTHEAST SWELL LOOKS TO  
ARRIVE LATE WEEK AND INTO THE WEEKEND AND MAY KEEP THE RIP RISK HIGH  
ALONG EAST FACING REEFS.  
 
 
 
GUZ001-MPZ001>003-021000-  
GUAM-ROTA-TINIAN-SAIPAN-  
458 AM CHST WED APR 2 2025  
 
36 HOUR SURF ZONE FORECAST FOR THE MARIANAS FROM 600 AM WEDNESDAY  
THROUGH 600 PM THURSDAY  
   
TODAY  
 
RIP CURRENT RISK.....MODERATE *.  
SURF HEIGHT  
NORTH FACING REEFS............4 TO 6 FEET.  
EAST FACING REEFS............6 TO 8 FEET.  
SOUTH FACING REEFS............1 TO 3 FEET.  
WEST FACING REEFS.............AROUND 1 FOOT.  
SWELL/PERIOD  
PRIMARY SWELL................EAST AT 4 TO 6 FEET.  
PRIMARY PERIOD...............8 SECONDS.  
SECONDARY SWELL..............NORTHEAST AT AROUND 3 FEET.  
SECONDARY PERIOD.............11 SECONDS.  
WATER TEMPERATURE  
RITIDIAN BUOY................83 DEGREES.  
MAX HEAT INDEX.....................AROUND 96.  
WINDS..............................EAST AT 10 TO 20 MPH.  
   
TONIGHT  
 
RIP CURRENT RISK.....MODERATE *.  
SURF HEIGHT  
NORTH FACING REEFS............4 TO 6 FEET.  
EAST FACING REEFS............6 TO 8 FEET.  
SOUTH FACING REEFS............2 TO 4 FEET.  
WEST FACING REEFS............AROUND 1 FOOT.  
SWELL/PERIOD  
PRIMARY SWELL................NORTHEAST AT 4 TO 6 FEET.  
PRIMARY PERIOD...............8 SECONDS.  
SECONDARY SWELL..............NORTHEAST AT AROUND 2 FEET.  
SECONDARY PERIOD.............11 SECONDS.  
WINDS..............................EAST AT 10 TO 15 MPH.  
   
THURSDAY  
 
RIP CURRENT RISK.....HIGH *.  
SURF HEIGHT  
NORTH FACING REEFS............5 TO 7 FEET.  
EAST FACING REEFS............7 TO 9 FEET.  
SOUTH FACING REEFS............2 TO 4 FEET.  
WEST FACING REEFS............1 TO 2 FEET.  
SWELL/PERIOD  
PRIMARY SWELL................NORTHEAST AT 5 TO 7 FEET.  
PRIMARY PERIOD...............8 SECONDS.  
SECONDARY SWELL..............NORTHEAST AT AROUND 2 FEET.  
SECONDARY PERIOD.............10 SECONDS.  
MAX HEAT INDEX.....................AROUND 96.  
WINDS..............................EAST AT 10 TO 20 MPH.  
 
TIDE INFORMATION FOR THE NEXT 36 HOURS...  
 
AT APRA HARBOR, GUAM...  
HIGH TIDE 2.4 FEET AT 9:30 AM WEDNESDAY  
LOW TIDE -0.4 FEET AT 4:49 PM WEDNESDAY  
HIGH TIDE 2.3 FEET AT 12:01 AM THURSDAY  
LOW TIDE 1.5 FEET AT 5:14 AM THURSDAY  
HIGH TIDE 2.3 FEET AT 10:09 AM THURSDAY  
LOW TIDE -0.4 FEET AT 5:46 PM THURSDAY  
 
AT ROTA ISLAND...  
HIGH TIDE 2.3 FEET AT 9:27 AM WEDNESDAY  
LOW TIDE -0.4 FEET AT 4:43 PM WEDNESDAY  
HIGH TIDE 2.1 FEET AT 11:58 PM WEDNESDAY  
LOW TIDE 1.4 FEET AT 5:08 AM THURSDAY  
HIGH TIDE 2.2 FEET AT 10:06 AM THURSDAY  
LOW TIDE -0.4 FEET AT 5:40 PM THURSDAY  
 
AT TINIAN ISLAND...  
HIGH TIDE 1.9 FEET AT 8:45 AM WEDNESDAY  
LOW TIDE -0.2 FEET AT 4:32 PM WEDNESDAY  
HIGH TIDE 1.7 FEET AT 12:09 AM THURSDAY  
LOW TIDE 1.4 FEET AT 4:43 AM THURSDAY  
HIGH TIDE 1.9 FEET AT 9:26 AM THURSDAY  
LOW TIDE -0.2 FEET AT 5:32 PM THURSDAY  
 
AT TANAPAG HARBOR, SAIPAN...  
HIGH TIDE 2.2 FEET AT 9:21 AM WEDNESDAY  
LOW TIDE -0.4 FEET AT 4:51 PM WEDNESDAY  
HIGH TIDE 2.2 FEET AT 12:36 AM THURSDAY  
LOW TIDE 1.6 FEET AT 5:32 AM THURSDAY  
HIGH TIDE 2.1 FEET AT 9:55 AM THURSDAY  
LOW TIDE -0.3 FEET AT 5:52 PM THURSDAY  
 
* LOW RISK OF RIP CURRENTS - STRONG CURRENTS CAN STILL OCCUR NEAR  
JETTIES AND REEF CHANNELS. ALWAYS HAVE A FLOTATION DEVICE WITH YOU  
IN THE WATER.  
 
MODERATE RISK OF RIP CURRENTS - WAVE CONDITIONS SUPPORT STRONGER OR  
MORE FREQUENT RIP CURRENTS. ALWAYS HAVE A FLOTATION DEVICE WITH YOU  
IN THE WATER.  
 
HIGH RISK OF RIP CURRENTS - 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.  
 
 
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