323
FZPQ50 PGUM 290710
SRFGUM
SURF ZONE FORECAST FOR THE MARIANA ISLANDS
NATIONAL WEATHER SERVICE TIYAN GU
510 PM CHST TUE SEP 29 2026
DISCUSSION
A MODERATE RISK OF RIP CURRENTS IS EXPECTED TO DEVELOP
ALONG EAST FACING REEFS OF THE MARIANAS BEGINNING WEDNESDAY, TO THEN
DEVELOP ALL REEFS WEDNESDAY NIGHT AS A STRENGTHENING SOUTHWESTERLY
SWELL ENVELOPS THE REGION. THERE IS SOME LIKELIHOOD FOR HAZARDOUS SURF
TO DEVELOP ALONG SOUTH, WEST AND NORTH FACING REEFS OF THE MARIANAS BY
THE WEEKEND, HIGHLY DEPENDENT ON THE DEVELOPMENT OF 93W AND ASSOCIATED
SOUTHWESTERLY MONSOON SURGE. A MODERATE RISK OF LIGHTNING IS EXPECTED
BEGINNING WEDNESDAY, TO THEN LAST THROUGH THE REST OF THE WEEK.
GUZ001-MPZ001>003-292000-
GUAM-ROTA-TINIAN-SAIPAN-
510 PM CHST TUE SEP 29 2026
36 HOUR SURF ZONE FORECAST FOR THE MARIANAS FROM 600 PM TUESDAY
THROUGH 600 AM THURSDAY
TONIGHT
RIP CURRENT RISK.....LOW *.
SURF HEIGHT
NORTH FACING REEFS............2 TO 3 FEET.
EAST FACING REEFS............2 TO 4 FEET.
SOUTH FACING REEFS............2 TO 3 FEET.
WEST FACING REEFS............2 TO 3 FEET.
SWELL/PERIOD
PRIMARY SWELL................EAST AT AROUND 2 FEET.
PRIMARY PERIOD...............9 SECONDS.
SECONDARY SWELL..............SOUTH AT AROUND 2 FEET.
SECONDARY PERIOD.............8 SECONDS.
WATER TEMPERATURE
APRA HARBOR..........86 DEGREES.
WINDS...............NORTHWEST AT AROUND 10 MPH.
WEDNESDAY
RIP CURRENT RISK.....MODERATE *.
SURF HEIGHT
NORTH FACING REEFS............2 TO 4 FEET.
EAST FACING REEFS............2 TO 4 FEET.
SOUTH FACING REEFS............3 TO 5 FEET.
WEST FACING REEFS............2 TO 4 FEET.
SWELL/PERIOD
PRIMARY SWELL................SOUTHWEST AT AROUND 4 FEET.
PRIMARY PERIOD...............8 SECONDS.
SECONDARY SWELL..............NORTHEAST AT AROUND 2 FEET.
SECONDARY PERIOD.............10 SECONDS.
MAX HEAT INDEX.........AROUND 101.
WINDS...............NORTHWEST AT AROUND 10 MPH.
WEDNESDAY NIGHT
RIP CURRENT RISK.....MODERATE *.
SURF HEIGHT
NORTH FACING REEFS............3 TO 5 FEET.
EAST FACING REEFS............3 TO 5 FEET.
SOUTH FACING REEFS............4 TO 6 FEET.
WEST FACING REEFS............4 TO 6 FEET.
SWELL/PERIOD
PRIMARY SWELL................SOUTHWEST AT AROUND 5 FEET.
PRIMARY PERIOD...............8 SECONDS.
SECONDARY SWELL..............NORTHEAST AT AROUND 3 FEET.
SECONDARY PERIOD.............10 SECONDS.
WINDS...............WEST AT 10 TO 15 MPH.
TIDE INFORMATION FOR THE NEXT 36 HOURS...
AT APRA HARBOR, GUAM...
HIGH TIDE 2.4 FEET AT 8:39 PM TUESDAY
LOW TIDE -0.1 FEET AT 3:36 AM WEDNESDAY
HIGH TIDE 2.3 FEET AT 10:23 AM WEDNESDAY
LOW TIDE 1.3 FEET AT 3:55 PM WEDNESDAY
HIGH TIDE 2.4 FEET AT 9:10 PM WEDNESDAY
LOW TIDE -0.3 FEET AT 4:24 AM THURSDAY
AT ROTA ISLAND...
HIGH TIDE 2.3 FEET AT 8:36 PM TUESDAY
LOW TIDE -0.1 FEET AT 3:30 AM WEDNESDAY
HIGH TIDE 2.2 FEET AT 10:20 AM WEDNESDAY
LOW TIDE 1.3 FEET AT 3:49 PM WEDNESDAY
HIGH TIDE 2.2 FEET AT 9:07 PM WEDNESDAY
LOW TIDE -0.2 FEET AT 4:18 AM THURSDAY
AT TINIAN ISLAND...
HIGH TIDE 1.8 FEET AT 8:37 PM TUESDAY
LOW TIDE 0.0 FEET AT 3:13 AM WEDNESDAY
HIGH TIDE 1.7 FEET AT 10:21 AM WEDNESDAY
LOW TIDE 0.4 FEET AT 3:32 PM WEDNESDAY
HIGH TIDE 1.8 FEET AT 9:08 PM WEDNESDAY
LOW TIDE -0.1 FEET AT 4:01 AM THURSDAY
AT TANAPAG HARBOR, SAIPAN...
HIGH TIDE 2.1 FEET AT 8:46 PM TUESDAY
LOW TIDE -0.1 FEET AT 3:44 AM WEDNESDAY
HIGH TIDE 2.1 FEET AT 10:51 AM WEDNESDAY
LOW TIDE 1.3 FEET AT 4:02 PM WEDNESDAY
HIGH TIDE 2.1 FEET AT 9:12 PM WEDNESDAY
LOW TIDE -0.2 FEET AT 4:32 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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