286
FZPQ50 PGUM 130619
SRFGUM
SURF ZONE FORECAST FOR THE MARIANA ISLANDS
NATIONAL WEATHER SERVICE TIYAN GU
419 PM CHST WED AUG 13 2025
DISCUSSION
THE PRIMARY TRADE SWELL REMAINS AROUND 2 TO 3 FT AS THE
TRADE WINDS REMAIN LIGHT. WITH NO OTHER NOTABLE SWELLS, THE RISK OF
RIP CURRENTS REMAINS LOW ALONG ALL REEFS. THERE WILL BE A MODERATE
RISK OF LIGHTNING THROUGH AT LEAST THURSDAY, ESPECIALLY FOR GUAM WHERE
ISLAND CONVECTION MAY CAUSE THUNDERSTORMS TO DEVELOP NEAR WESTERN
SHORES AND NEARBY WATERS.
GUZ001-MPZ001>003-132200-
GUAM-ROTA-TINIAN-SAIPAN-
419 PM CHST WED AUG 13 2025
36 HOUR SURF ZONE FORECAST FOR THE MARIANAS FROM 600 PM WEDNESDAY
THROUGH 600 AM FRIDAY
TONIGHT
RIP CURRENT RISK.....LOW *.
SURF HEIGHT
NORTH FACING REEFS............1 TO 3 FEET.
EAST FACING REEFS............2 TO 4 FEET.
SOUTH FACING REEFS............1 TO 3 FEET.
WEST FACING REEFS............AROUND 1 FOOT.
SWELL/PERIOD
PRIMARY SWELL................EAST AT 2 TO 3 FEET.
PRIMARY PERIOD...............9 SECONDS.
WATER TEMPERATURE
RITIDIAN BUOY..........86 DEGREES.
WINDS...............LIGHT AND VARIABLE.
THURSDAY
RIP CURRENT RISK.....LOW *.
SURF HEIGHT
NORTH FACING REEFS............1 TO 3 FEET.
EAST FACING REEFS............2 TO 4 FEET.
SOUTH FACING REEFS............1 TO 3 FEET.
WEST FACING REEFS............AROUND 1 FOOT.
SWELL/PERIOD
PRIMARY SWELL................EAST AT 2 TO 3 FEET.
PRIMARY PERIOD...............9 SECONDS.
MAX HEAT INDEX.........AROUND 101.
WINDS...............LIGHT AND VARIABLE.
THURSDAY NIGHT
RIP CURRENT RISK.....LOW *.
SURF HEIGHT
NORTH FACING REEFS............1 TO 3 FEET.
EAST FACING REEFS............2 TO 4 FEET.
SOUTH FACING REEFS............1 TO 3 FEET.
WEST FACING REEFS............AROUND 1 FOOT.
SWELL/PERIOD
PRIMARY SWELL................EAST AT 2 TO 3 FEET.
PRIMARY PERIOD...............9 SECONDS.
WINDS...............LIGHT AND VARIABLE.
TIDE INFORMATION FOR THE NEXT 36 HOURS...
AT APRA HARBOR, GUAM...
HIGH TIDE 2.6 FEET AT 10:40 PM WEDNESDAY
LOW TIDE 0.8 FEET AT 5:11 AM THURSDAY
HIGH TIDE 2.3 FEET AT 11:02 AM THURSDAY
LOW TIDE 0.9 FEET AT 5:05 PM THURSDAY
HIGH TIDE 2.6 FEET AT 11:11 PM THURSDAY
LOW TIDE 0.5 FEET AT 6:05 AM FRIDAY
AT ROTA ISLAND...
HIGH TIDE 2.5 FEET AT 10:37 PM WEDNESDAY
LOW TIDE 0.7 FEET AT 5:05 AM THURSDAY
HIGH TIDE 2.2 FEET AT 10:59 AM THURSDAY
LOW TIDE 0.9 FEET AT 4:59 PM THURSDAY
HIGH TIDE 2.5 FEET AT 11:08 PM THURSDAY
LOW TIDE 0.5 FEET AT 5:59 AM FRIDAY
AT TINIAN ISLAND...
HIGH TIDE 1.7 FEET AT 10:11 PM WEDNESDAY
LOW TIDE 0.5 FEET AT 4:54 AM THURSDAY
HIGH TIDE 1.3 FEET AT 10:40 AM THURSDAY
LOW TIDE 0.6 FEET AT 4:27 PM THURSDAY
HIGH TIDE 1.7 FEET AT 10:38 PM THURSDAY
LOW TIDE 0.2 FEET AT 5:53 AM FRIDAY
AT TANAPAG HARBOR, SAIPAN...
HIGH TIDE 2.2 FEET AT 11:01 PM WEDNESDAY
LOW TIDE 0.6 FEET AT 5:25 AM THURSDAY
HIGH TIDE 1.8 FEET AT 11:22 AM THURSDAY
LOW TIDE 0.7 FEET AT 5:11 PM THURSDAY
HIGH TIDE 2.2 FEET AT 11:27 PM THURSDAY
LOW TIDE 0.3 FEET AT 6:20 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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