398
FZPQ50 PGUM 270703
SRFGUM
SURF ZONE FORECAST FOR THE MARIANA ISLANDS
NATIONAL WEATHER SERVICE TIYAN GU
503 PM CHST TUE OCT 27 2026
DISCUSSION
THERE WILL BE A MODERATE RISK OF RIP CURRENTS ALL WEEK FOR NORTH-
AND EAST-FACING REEFS DUE TO A PRIMARY EAST-NORTHEAST SWELL AND A
SECONDARY WEST-NORTHWEST SWELL THAT WILL BECOME NEGLIGIBLE BY
WEDNESDAY. THERE IS ALSO A MODERATE RISK OF LIGHTNING TONIGHT FOR
TINIAN AND SAIPAN, AND ALL ISLANDS WEDNESDAY. SURF IS LIKELY TO
BECOME HAZARDOUS THURSDAY NIGHT AS TYPHOON IN-FA PASSES SOMEWHERE
THROUGH THE REMOTE, FAR NORTHERN CNMI BETWEEN JUST NORTH OF SAIPAN
AND MAUG ISLAND. SURF WILL LIKELY REACH DANGEROUS LEVELS FOR TINIAN
AND SAIPAN, ESPECIALLY IF IN-FA TAKES A SOUTHERN TRACK.
GUZ001-MPZ001>003-272215-
GUAM-ROTA-TINIAN-SAIPAN-
503 PM CHST TUE OCT 27 2026
36 HOUR SURF ZONE FORECAST FOR THE MARIANAS FROM 600 PM TUESDAY
THROUGH 600 AM THURSDAY
TONIGHT
RIP CURRENT RISK.....MODERATE *.
SURF HEIGHT
NORTH FACING REEFS............4 TO 6 FEET.
EAST FACING REEFS............5 TO 7 FEET.
SOUTH FACING REEFS............1 TO 3 FEET.
WEST FACING REEFS............3 TO 4 FEET.
SWELL/PERIOD
PRIMARY SWELL................EAST AT AROUND 5 FEET.
PRIMARY PERIOD...............10 SECONDS.
SECONDARY SWELL..............NORTHWEST AT AROUND 2 FEET.
SECONDARY PERIOD.............11 SECONDS.
WATER TEMPERATURE
CDAS SST ANALYSIS..........84 DEGREES.
WINDS...............LIGHT AND VARIABLE.
WEDNESDAY
RIP CURRENT RISK.....MODERATE *.
SURF HEIGHT
NORTH FACING REEFS............3 TO 5 FEET.
EAST FACING REEFS............6 TO 8 FEET.
SOUTH FACING REEFS............1 TO 3 FEET.
WEST FACING REEFS............2 TO 4 FEET.
SWELL/PERIOD
PRIMARY SWELL................EAST AT AROUND 6 FEET.
PRIMARY PERIOD...............10 SECONDS.
MAX HEAT INDEX.........AROUND 101.
WINDS...............NORTH AT 5 TO 10 MPH.
WEDNESDAY NIGHT
RIP CURRENT RISK.....MODERATE *.
SURF HEIGHT
NORTH FACING REEFS............3 TO 5 FEET.
EAST FACING REEFS............6 TO 8 FEET.
SOUTH FACING REEFS............2 TO 3 FEET.
WEST FACING REEFS............2 TO 3 FEET.
SWELL/PERIOD
PRIMARY SWELL................EAST AT AROUND 6 FEET.
PRIMARY PERIOD...............10 SECONDS.
WINDS...............NORTHEAST AT 5 TO 15 MPH.
TIDE INFORMATION FOR THE NEXT 36 HOURS...
AT APRA HARBOR, GUAM...
HIGH TIDE 2.4 FEET AT 7:25 PM TUESDAY
LOW TIDE -0.6 FEET AT 2:31 AM WEDNESDAY
HIGH TIDE 2.4 FEET AT 9:34 AM WEDNESDAY
LOW TIDE 1.4 FEET AT 2:56 PM WEDNESDAY
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
AT ROTA ISLAND...
HIGH TIDE 2.3 FEET AT 7:22 PM TUESDAY
LOW TIDE -0.6 FEET AT 2:25 AM WEDNESDAY
HIGH TIDE 2.3 FEET AT 9:31 AM WEDNESDAY
LOW TIDE 1.3 FEET AT 2:50 PM WEDNESDAY
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
AT TINIAN ISLAND...
HIGH TIDE 1.8 FEET AT 7:23 PM TUESDAY
LOW TIDE -0.2 FEET AT 2:08 AM WEDNESDAY
HIGH TIDE 1.8 FEET AT 9:32 AM WEDNESDAY
LOW TIDE 0.5 FEET AT 2:33 PM WEDNESDAY
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
AT TANAPAG HARBOR, SAIPAN...
HIGH TIDE 2.2 FEET AT 7:23 PM TUESDAY
LOW TIDE -0.4 FEET AT 2:38 AM WEDNESDAY
HIGH TIDE 2.3 FEET AT 10:00 AM WEDNESDAY
LOW TIDE 1.5 FEET AT 3:06 PM WEDNESDAY
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 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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