125
FZPQ50 PGUM 221801
SRFGUM
SURF ZONE FORECAST FOR THE MARIANA ISLANDS
NATIONAL WEATHER SERVICE TIYAN GU
401 AM CHST TUE DEC 23 2025
DISCUSSION
THERE IS A HIGH RISK OF RIP CURRENTS ALONG NORTH AND
EAST FACING REEFS AND A MODERATE RISK ALONG SOUTH AND WEST FACING
REEFS. THERE IS ALSO HIGH SURF ADVISORY (HSA) IN EFFECT FOR NORTH
FACING REEFS. THE NORTHEAST SWELL IS EXPECTED TO CONTINUE TO
DIMINISH OVER THE NEXT SEVERAL DAYS. SURF AND RISK OF RIP CURRENTS
ARE EXPECTED TO FALL WITH THE SWELL. THERE WILL BE A MODERATE RISK
OF LIGHTING TODAY FOR GUAM.
GUZ001-MPZ001>003-230915-
GUAM-ROTA-TINIAN-SAIPAN-
401 AM CHST TUE DEC 23 2025
...HIGH SURF ADVISORY IN EFFECT UNTIL 4 AM CHST WEDNESDAY ALONG NORTH
FACING REEFS...
...HIGH RIP CURRENT RISK IN EFFECT THROUGH LATE TONIGHT ALONG NORTH
AND EAST FACING REEFS...
36 HOUR SURF ZONE FORECAST FOR THE MARIANAS FROM 600 AM TUESDAY
THROUGH 600 PM WEDNESDAY
TODAY
RIP CURRENT RISK.....HIGH. POUNDING SURF WILL PRODUCE LIFE
THREATENING RIP CURRENTS AT REEFS AND BEACHES.
SURF HEIGHT
NORTH FACING REEFS............9 TO 11 FEET.
EAST FACING REEFS............9 TO 10 FEET.
SOUTH FACING REEFS............3 TO 5 FEET.
WEST FACING REEFS............3 TO 5 FEET.
SWELL/PERIOD
PRIMARY SWELL................NORTHEAST AT 7 TO 9 FEET.
PRIMARY PERIOD...............10 SECONDS.
SECONDARY SWELL..............EAST AT AROUND 3 FEET.
SECONDARY PERIOD.............9 SECONDS.
WATER TEMPERATURE
RITIDIAN BUOY..........85 DEGREES.
MAX HEAT INDEX.........AROUND 98.
WINDS...............EAST AT 15 TO 20 MPH.
TONIGHT
RIP CURRENT RISK.....HIGH. POUNDING SURF WILL PRODUCE LIFE
THREATENING RIP CURRENTS AT REEFS AND BEACHES.
SURF HEIGHT
NORTH FACING REEFS............8 TO 10 FEET.
EAST FACING REEFS............7 TO 9 FEET.
SOUTH FACING REEFS............2 TO 4 FEET.
WEST FACING REEFS............3 TO 5 FEET.
SWELL/PERIOD
PRIMARY SWELL................NORTHEAST AT 6 TO 8 FEET.
PRIMARY PERIOD...............10 SECONDS.
SECONDARY SWELL..............EAST AT AROUND 3 FEET.
SECONDARY PERIOD.............9 SECONDS.
WINDS...............EAST AT 10 TO 20 MPH.
WEDNESDAY
RIP CURRENT RISK.....MODERATE *.
SURF HEIGHT
NORTH FACING REEFS............7 TO 8 FEET.
EAST FACING REEFS............7 TO 8 FEET.
SOUTH FACING REEFS............2 TO 4 FEET.
WEST FACING REEFS............2 TO 4 FEET.
SWELL/PERIOD
PRIMARY SWELL................NORTHEAST AT 5 TO 7 FEET.
PRIMARY PERIOD...............9 SECONDS.
MAX HEAT INDEX.........AROUND 95.
WINDS...............EAST AT 15 TO 20 MPH.
TIDE INFORMATION FOR THE NEXT 36 HOURS...
AT APRA HARBOR, GUAM...
LOW TIDE -0.6 FEET AT 3:24 AM TUESDAY
HIGH TIDE 2.1 FEET AT 10:53 AM TUESDAY
LOW TIDE 1.5 FEET AT 4:08 PM TUESDAY
HIGH TIDE 2.0 FEET AT 8:32 PM TUESDAY
LOW TIDE -0.5 FEET AT 4:02 AM WEDNESDAY
HIGH TIDE 2.1 FEET AT 11:30 AM WEDNESDAY
LOW TIDE 1.4 FEET AT 4:55 PM WEDNESDAY
AT ROTA ISLAND...
HIGH TIDE 1.9 FEET AT 10:50 AM TUESDAY
LOW TIDE 1.4 FEET AT 4:02 PM TUESDAY
HIGH TIDE 1.8 FEET AT 8:29 PM TUESDAY
LOW TIDE -0.5 FEET AT 3:56 AM WEDNESDAY
HIGH TIDE 2.0 FEET AT 11:27 AM WEDNESDAY
LOW TIDE 1.3 FEET AT 4:49 PM WEDNESDAY
HIGH TIDE 1.8 FEET AT 9:12 PM WEDNESDAY
AT TINIAN ISLAND...
HIGH TIDE 1.5 FEET AT 10:51 AM TUESDAY
LOW TIDE 0.5 FEET AT 3:45 PM TUESDAY
HIGH TIDE 1.4 FEET AT 8:30 PM TUESDAY
LOW TIDE -0.2 FEET AT 3:39 AM WEDNESDAY
HIGH TIDE 1.5 FEET AT 11:28 AM WEDNESDAY
LOW TIDE 0.5 FEET AT 4:32 PM WEDNESDAY
HIGH TIDE 1.4 FEET AT 9:13 PM WEDNESDAY
AT TANAPAG HARBOR, SAIPAN...
LOW TIDE -0.3 FEET AT 3:30 AM TUESDAY
HIGH TIDE 2.2 FEET AT 11:21 AM TUESDAY
LOW TIDE 1.7 FEET AT 4:09 PM TUESDAY
HIGH TIDE 2.0 FEET AT 8:17 PM TUESDAY
LOW TIDE -0.3 FEET AT 4:06 AM WEDNESDAY
HIGH TIDE 2.2 FEET AT 11:57 AM WEDNESDAY
LOW TIDE 1.6 FEET AT 5:04 PM WEDNESDAY
* 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. RIP CURRENTS
WILL BE LIFE THREATENING. IF CAUGHT IN A RIP CURRENT, SWIM PARALLEL
TO THE BEACH RATHER THAN AGAINST THE CURRENT.
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