196
FZPQ50 PGUM 131802
SRFGUM
SURF ZONE FORECAST FOR THE MARIANA ISLANDS
NATIONAL WEATHER SERVICE TIYAN GU
402 AM CHST THU AUG 14 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 THROUGH FRIDAY.
AS WINDS AND TRADE SWELL BUILD SLIGHTLY THIS WEEKEND, SURF WILL
BUILD SLIGHTLY ALONG EAST FACING REEFS AND MAY CAUSE THE RISK OF RIP
CURRENTS TO BECOME MODERATE. THERE WILL BE A MODERATE RISK OF
LIGHTNING TODAY, ESPECIALLY FOR GUAM WHERE ISLAND CONVECTION MAY
CAUSE THUNDERSTORMS TO DEVELOP NEAR WESTERN SHORES AND NEARBY WATERS.
GUZ001-MPZ001>003-140915-
GUAM-ROTA-TINIAN-SAIPAN-
402 AM CHST THU AUG 14 2025
36 HOUR SURF ZONE FORECAST FOR THE MARIANAS FROM 600 AM THURSDAY
THROUGH 600 PM FRIDAY
TODAY
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.
MAX HEAT INDEX.........AROUND 101.
WINDS...............LIGHT AND VARIABLE.
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.
WINDS...............LIGHT AND VARIABLE.
FRIDAY
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 100.
WINDS...............LIGHT AND VARIABLE.
TIDE INFORMATION FOR THE NEXT 36 HOURS...
AT APRA HARBOR, GUAM...
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
HIGH TIDE 2.2 FEET AT 12:23 PM FRIDAY
AT ROTA ISLAND...
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
HIGH TIDE 2.0 FEET AT 12:20 PM FRIDAY
AT TINIAN ISLAND...
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
HIGH TIDE 1.3 FEET AT 12:18 PM FRIDAY
AT TANAPAG HARBOR, SAIPAN...
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
HIGH TIDE 1.8 FEET AT 12:45 PM 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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