386
FZPQ50 PGUM 171937
SRFGUM
SURF ZONE FORECAST FOR THE MARIANA ISLANDS
NATIONAL WEATHER SERVICE TIYAN GU
537 AM CHST FRI SEP 18 2026
DISCUSSION
THERE IS A MODERATE RISK OF RIP CURRENTS ALONG ALL REEFS THROUGH THE
WEEKEND. A MODERATE RISK OF LIGHTING CONTINUES ACROSS GUAM AND ROTA
OVER THE NEXT SEVERAL DAYS. FOR TINIAN AND SAIPAN, THERE IS A
MODERATE RISK OF LIGHTNING OVER THE WEEKEND AND EARLY NEXT WEEK.
GUZ001-MPZ001>003-181045-
GUAM-ROTA-TINIAN-SAIPAN-
537 AM CHST FRI SEP 18 2026
36 HOUR SURF ZONE FORECAST FOR THE MARIANAS FROM 600 AM FRIDAY
THROUGH 600 PM SATURDAY
TODAY
RIP CURRENT RISK.....MODERATE *.
SURF HEIGHT
NORTH FACING REEFS............4 TO 6 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 4 FEET.
PRIMARY PERIOD...............9 SECONDS.
SECONDARY SWELL..............NORTH TO NORTHEAST AT 3 TO 4 FEET.
SECONDARY PERIOD.............8 SECONDS.
WATER TEMPERATURE
PAGO BUOY..........84 DEGREES.
MAX HEAT INDEX.........AROUND 100.
WINDS...............WEST AT 10 TO 15 MPH.
TONIGHT
RIP CURRENT RISK.....MODERATE *.
SURF HEIGHT
NORTH FACING REEFS............5 TO 7 FEET.
EAST FACING REEFS............3 TO 5 FEET.
SOUTH FACING REEFS............4 TO 6 FEET.
WEST FACING REEFS............5 TO 6 FEET.
SWELL/PERIOD
PRIMARY SWELL................SOUTHWEST AT 3 TO 4 FEET.
PRIMARY PERIOD...............8 SECONDS.
SECONDARY SWELL..............NORTHWEST AT 3 TO 4 FEET.
SECONDARY PERIOD.............8 SECONDS.
TERTIARY SWELL...............NORTHEAST AT AROUND 2 FEET.
TERTIARY PERIOD..............10 SECONDS.
WINDS...............WEST TO SOUTHWEST AT 10 TO 15 MPH.
SATURDAY
RIP CURRENT RISK.....MODERATE *.
SURF HEIGHT
NORTH FACING REEFS............5 TO 7 FEET.
EAST FACING REEFS............3 TO 5 FEET.
SOUTH FACING REEFS............5 TO 7 FEET.
WEST FACING REEFS............5 TO 7 FEET.
SWELL/PERIOD
PRIMARY SWELL................SOUTHWEST AT 3 TO 4 FEET.
PRIMARY PERIOD...............8 SECONDS.
SECONDARY SWELL..............NORTHWEST AT AROUND 3 FEET.
SECONDARY PERIOD.............8 SECONDS.
TERTIARY SWELL...............NORTHEAST AT AROUND 2 FEET.
TERTIARY PERIOD..............10 SECONDS.
MAX HEAT INDEX.........AROUND 100.
WINDS...............SOUTHWEST AT AROUND 10 MPH.
TIDE INFORMATION FOR THE NEXT 36 HOURS...
AT APRA HARBOR, GUAM...
LOW TIDE 0.2 FEET AT 6:19 AM FRIDAY
HIGH TIDE 1.9 FEET AT 2:24 PM FRIDAY
LOW TIDE 1.7 FEET AT 7:03 PM FRIDAY
HIGH TIDE 1.9 FEET AT 11:14 PM FRIDAY
LOW TIDE 0.3 FEET AT 7:19 AM SATURDAY
HIGH TIDE 2.0 FEET AT 3:48 PM SATURDAY
LOW TIDE 1.7 FEET AT 8:41 PM SATURDAY
AT ROTA ISLAND...
LOW TIDE 0.2 FEET AT 6:13 AM FRIDAY
HIGH TIDE 1.8 FEET AT 2:21 PM FRIDAY
LOW TIDE 1.6 FEET AT 6:57 PM FRIDAY
HIGH TIDE 1.8 FEET AT 11:11 PM FRIDAY
LOW TIDE 0.3 FEET AT 7:13 AM SATURDAY
HIGH TIDE 1.8 FEET AT 3:45 PM SATURDAY
LOW TIDE 1.6 FEET AT 8:35 PM SATURDAY
AT TINIAN ISLAND...
LOW TIDE 0.1 FEET AT 5:56 AM FRIDAY
HIGH TIDE 1.4 FEET AT 2:22 PM FRIDAY
LOW TIDE 0.6 FEET AT 6:40 PM FRIDAY
HIGH TIDE 1.4 FEET AT 11:12 PM FRIDAY
LOW TIDE 0.1 FEET AT 6:56 AM SATURDAY
HIGH TIDE 1.4 FEET AT 3:46 PM SATURDAY
LOW TIDE 0.6 FEET AT 8:18 PM SATURDAY
AT TANAPAG HARBOR, SAIPAN...
LOW TIDE 0.3 FEET AT 6:39 AM FRIDAY
HIGH TIDE 1.8 FEET AT 2:46 PM FRIDAY
LOW TIDE 1.6 FEET AT 6:54 PM FRIDAY
HIGH TIDE 1.8 FEET AT 11:06 PM FRIDAY
LOW TIDE 0.3 FEET AT 7:38 AM SATURDAY
HIGH TIDE 1.8 FEET AT 4:33 PM SATURDAY
LOW TIDE 1.7 FEET AT 8:30 PM SATURDAY
* 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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