762  
FZPQ50 PGUM 061800  
SRFGUM  
 
SURF ZONE FORECAST FOR THE MARIANA ISLANDS  
NATIONAL WEATHER SERVICE TIYAN GU  
400 AM CHST MON JUL 7 2025  
   
DISCUSSION
 
A LOW RISK OF RIP CURRENTS IS EXPECTED ALONG ALL  
REEFS FOR MOST OF THE WEEK. SURF AND RIP RISK COULD RISE TOWARD THE  
WEEKEND ALONG WEST AND NORTH FACING REEFS, AS A NORTHWESTERLY SWELL  
EMANATING FROM A DISTANT TROPICAL DISTURBANCE ARRIVES TO THE REGION.  
A MODERATE RISK OF LIGHTNING IS EXPECTED FOR MOST OF THE WEEK AS AN  
UNSETTLED PATTERN CONTINUES.  
 

 
 
GUZ001-MPZ001>003-070815-  
GUAM-ROTA-TINIAN-SAIPAN-  
400 AM CHST MON JUL 7 2025  
 
36 HOUR SURF ZONE FORECAST FOR THE MARIANAS FROM 600 AM MONDAY  
THROUGH 600 PM TUESDAY  
   
TODAY
 
 
RIP CURRENT RISK.....LOW *.  
SURF HEIGHT  
NORTH FACING REEFS............2 TO 3 FEET.  
EAST FACING REEFS............3 TO 5 FEET.  
SOUTH FACING REEFS............1 TO 2 FEET.  
WEST FACING REEFS..........AROUND 1 FOOT.  
SWELL/PERIOD  
PRIMARY SWELL................EAST AT 2 TO 3 FEET.  
PRIMARY PERIOD...............8 SECONDS.  
WATER TEMPERATURE  
RITIDIAN BUOY..........86 DEGREES.  
MAX HEAT INDEX.........AROUND 100.  
WINDS...............SOUTHWEST AT 10 TO 15 MPH.  
   
TONIGHT
 
 
RIP CURRENT RISK.....LOW *.  
SURF HEIGHT  
NORTH FACING REEFS............2 TO 3 FEET.  
EAST FACING REEFS............3 TO 5 FEET.  
SOUTH FACING REEFS............1 TO 2 FEET.  
WEST FACING REEFS..........AROUND 1 FOOT.  
SWELL/PERIOD  
PRIMARY SWELL................EAST AT 2 TO 3 FEET.  
PRIMARY PERIOD...............8 SECONDS.  
WINDS...............SOUTHWEST AT 10 TO 15 MPH.  
   
TUESDAY
 
 
RIP CURRENT RISK.....LOW *.  
SURF HEIGHT  
NORTH FACING REEFS............1 TO 2 FEET.  
EAST FACING REEFS............2 TO 3 FEET.  
SOUTH FACING REEFS..........AROUND 1 FOOT.  
WEST FACING REEFS..........AROUND 1 FOOT.  
SWELL/PERIOD  
PRIMARY SWELL................EAST AT AROUND 2 FEET.  
PRIMARY PERIOD...............8 SECONDS.  
MAX HEAT INDEX.........AROUND 102.  
WINDS...............SOUTH AT 10 TO 15 MPH.  
 
TIDE INFORMATION FOR THE NEXT 36 HOURS...  
 
AT APRA HARBOR, GUAM...  
LOW TIDE 0.2 FEET AT 11:25 AM MONDAY  
HIGH TIDE 2.2 FEET AT 7:10 PM MONDAY  
LOW TIDE 1.9 FEET AT 11:38 PM MONDAY  
HIGH TIDE 2.3 FEET AT 4:26 AM TUESDAY  
LOW TIDE 0.0 FEET AT 12:07 PM TUESDAY  
HIGH TIDE 2.3 FEET AT 7:50 PM TUESDAY  
 
AT ROTA ISLAND...  
LOW TIDE 0.2 FEET AT 11:19 AM MONDAY  
HIGH TIDE 2.1 FEET AT 7:07 PM MONDAY  
LOW TIDE 1.8 FEET AT 11:32 PM MONDAY  
HIGH TIDE 2.2 FEET AT 4:23 AM TUESDAY  
LOW TIDE 0.0 FEET AT 12:01 PM TUESDAY  
HIGH TIDE 2.2 FEET AT 7:47 PM TUESDAY  
 
AT TINIAN ISLAND...  
LOW TIDE -0.1 FEET AT 11:08 AM MONDAY  
HIGH TIDE 1.5 FEET AT 7:22 PM MONDAY  
LOW TIDE 1.5 FEET AT 10:19 PM MONDAY  
HIGH TIDE 1.7 FEET AT 3:16 AM TUESDAY  
LOW TIDE -0.2 FEET AT 11:47 AM TUESDAY  
HIGH TIDE 1.6 FEET AT 8:02 PM TUESDAY  
 
AT TANAPAG HARBOR, SAIPAN...  
LOW TIDE 0.0 FEET AT 11:31 AM MONDAY  
HIGH TIDE 1.8 FEET AT 7:52 PM MONDAY  
LOW TIDE 1.7 FEET AT 10:36 PM MONDAY  
HIGH TIDE 2.1 FEET AT 3:58 AM TUESDAY  
LOW TIDE -0.2 FEET AT 12:11 PM TUESDAY  
HIGH TIDE 1.9 FEET AT 8:29 PM TUESDAY  
 
* 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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