383
FZPQ50 PGUM 280633
SRFGUM
SURF ZONE FORECAST FOR THE MARIANA ISLANDS
NATIONAL WEATHER SERVICE TIYAN GU
433 PM CHST WED OCT 28 2026
DISCUSSION
THERE WILL BE A MODERATE RISK OF RIP CURRENTS THROUGH THE WEEKEND
FOR NORTH- AND EAST-FACING REEFS DUE TO A PRIMARY EAST-NORTHEAST
SWELL. THERE IS MODERATE RISK OF LIGHTNING TONIGHT FOR ALL ISLANDS.
SURF IS LIKELY TO BECOME HAZARDOUS THURSDAY NIGHT AS TYPHOON IN-FA
PASSES SOMEWHERE THROUGH THE REMOTE, FAR NORTHERN CNMI BETWEEN
SARIGAN AND MAUG. SURF WILL LIKELY REACH HAZARDOUS LEVELS FOR GUAM
AND ROTA AND DANGEROUS LEVELS FOR TINIAN AND SAIPAN, ESPECIALLY IF
IN-FA TAKES A MORE SOUTHERN TRACK.
GUZ001-MPZ001>003-282145-
GUAM-ROTA-TINIAN-SAIPAN-
433 PM CHST WED OCT 28 2026
36 HOUR SURF ZONE FORECAST FOR THE MARIANAS FROM 600 PM WEDNESDAY
THROUGH 600 AM FRIDAY
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 3 FEET.
WEST FACING REEFS............2 TO 3 FOOT.
SWELL/PERIOD
PRIMARY SWELL................EAST AT 6 FEET.
PRIMARY PERIOD...............10 SECONDS.
WATER TEMPERATURE
CDAS SST ANALYSIS..........84 DEGREES.
WINDS...............NORTHEAST AT 5 TO 15 MPH.
THURSDAY
RIP CURRENT RISK.....MODERATE *.
SURF HEIGHT
NORTH FACING REEFS............3 TO 5 FEET.
EAST FACING REEFS............5 TO 7 FEET.
SOUTH FACING REEFS............2 TO 3 FEET.
WEST FACING REEFS............2 TO 3 FEET.
SWELL/PERIOD
PRIMARY SWELL................EAST AT 5 FEET.
PRIMARY PERIOD...............10 SECONDS.
MAX HEAT INDEX.........AROUND 100.
WINDS...............NORTHEAST AT 10 TO 20 MPH.
THURSDAY NIGHT
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............2 TO 3 FEET.
SWELL/PERIOD
PRIMARY SWELL................EAST AT 6 TO 7 FEET.
PRIMARY PERIOD...............10 SECONDS.
WINDS...............NORTH AT 10 TO 15 MPH.
TIDE INFORMATION FOR THE NEXT 36 HOURS...
AT APRA HARBOR, GUAM...
HIGH TIDE 2.4 FEET AT 7:58 PM WEDNESDAY
LOW TIDE -0.7 FEET AT 3:16 AM THURSDAY
HIGH TIDE 2.4 FEET AT 10:33 AM THURSDAY
LOW TIDE 1.5 FEET AT 3:47 PM THURSDAY
HIGH TIDE 2.3 FEET AT 8:35 PM THURSDAY
LOW TIDE -0.7 FEET AT 4:07 AM FRIDAY
AT ROTA ISLAND...
HIGH TIDE 2.2 FEET AT 7:55 PM WEDNESDAY
LOW TIDE -0.7 FEET AT 3:10 AM THURSDAY
HIGH TIDE 2.2 FEET AT 10:30 AM THURSDAY
LOW TIDE 1.5 FEET AT 3:41 PM THURSDAY
HIGH TIDE 2.2 FEET AT 8:32 PM THURSDAY
LOW TIDE -0.7 FEET AT 4:01 AM FRIDAY
AT TINIAN ISLAND...
HIGH TIDE 1.8 FEET AT 7:56 PM WEDNESDAY
LOW TIDE -0.2 FEET AT 2:53 AM THURSDAY
HIGH TIDE 1.7 FEET AT 10:31 AM THURSDAY
LOW TIDE 0.5 FEET AT 3:24 PM THURSDAY
HIGH TIDE 1.7 FEET AT 8:33 PM THURSDAY
LOW TIDE -0.2 FEET AT 3:44 AM FRIDAY
HIGH TIDE 1.7 FEET AT 11:40 AM FRIDAY
AT TANAPAG HARBOR, SAIPAN...
HIGH TIDE 2.2 FEET AT 7:53 PM WEDNESDAY
LOW TIDE -0.6 FEET AT 3:23 AM THURSDAY
HIGH TIDE 2.3 FEET AT 11:06 AM THURSDAY
LOW TIDE 1.7 FEET AT 3:57 PM THURSDAY
HIGH TIDE 2.2 FEET AT 8:27 PM THURSDAY
LOW TIDE -0.6 FEET AT 4:13 AM FRIDAY
* 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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