378
FZPQ50 PGUM 181855
SRFGUM
SURF ZONE FORECAST FOR THE MARIANA ISLANDS
NATIONAL WEATHER SERVICE TIYAN GU
455 AM CHST SUN OCT 19 2025
DISCUSSION
THERE WILL BE A MODERATE RISK OF RIP CURRENTS MOST OF
THIS WEEK ALONG NORTH AND EAST FACING REEFS OF THE MARIANAS. A
MODERATE RISK OF LIGHTNING COULD RETURN AROUND THURSDAY.
GUZ001-MPZ001>003-191000-
GUAM-ROTA-TINIAN-SAIPAN-
455 AM CHST SUN OCT 19 2025
36 HOUR SURF ZONE FORECAST FOR THE MARIANAS FROM 600 AM SUNDAY
THROUGH 600 PM MONDAY
TODAY
RIP CURRENT RISK.....MODERATE *.
SURF HEIGHT
NORTH FACING REEFS............4 TO 6 FEET.
EAST FACING REEFS............4 TO 6 FEET.
SOUTH FACING REEFS............1 TO 3 FEET.
WEST FACING REEFS............1 TO 3 FEET.
SWELL/PERIOD
PRIMARY SWELL................EAST AT 3 TO 5 FEET.
PRIMARY PERIOD...............9 SECONDS.
SECONDARY SWELL..............NORTH AT 2 TO 3 FEET.
SECONDARY PERIOD.............10 SECONDS.
WATER TEMPERATURE
RITIDIAN BUOY..........86 DEGREES.
MAX HEAT INDEX.........AROUND 102.
WINDS...............EAST AT 15 TO 20 MPH.
TONIGHT
RIP CURRENT RISK.....MODERATE *.
SURF HEIGHT
NORTH FACING REEFS............4 TO 6 FEET.
EAST FACING REEFS............4 TO 6 FEET.
SOUTH FACING REEFS............1 TO 3 FEET.
WEST FACING REEFS............1 TO 3 FEET.
SWELL/PERIOD
PRIMARY SWELL................EAST AT 3 TO 5 FEET.
PRIMARY PERIOD...............9 SECONDS.
SECONDARY SWELL..............NORTH AT AROUND 2 FEET.
SECONDARY PERIOD.............10 SECONDS.
WINDS...............EAST AT 10 TO 20 MPH.
MONDAY
RIP CURRENT RISK.....MODERATE *.
SURF HEIGHT
NORTH FACING REEFS............4 TO 6 FEET.
EAST FACING REEFS............4 TO 6 FEET.
SOUTH FACING REEFS............1 TO 3 FEET.
WEST FACING REEFS............1 TO 3 FEET.
SWELL/PERIOD
PRIMARY SWELL................EAST AT 3 TO 5 FEET.
PRIMARY PERIOD...............9 SECONDS.
SECONDARY SWELL..............NORTH AT 2 TO 3 FEET.
SECONDARY PERIOD.............13 SECONDS.
MAX HEAT INDEX.........AROUND 100.
WINDS...............EAST AT 10 TO 15 MPH.
TIDE INFORMATION FOR THE NEXT 36 HOURS...
AT APRA HARBOR, GUAM...
HIGH TIDE 2.0 FEET AT 6:14 AM SUNDAY
LOW TIDE 0.6 FEET AT 12:18 PM SUNDAY
HIGH TIDE 2.3 FEET AT 6:30 PM SUNDAY
LOW TIDE 0.4 FEET AT 12:58 AM MONDAY
HIGH TIDE 2.1 FEET AT 7:03 AM MONDAY
LOW TIDE 0.8 FEET AT 12:56 PM MONDAY
HIGH TIDE 2.3 FEET AT 6:48 PM MONDAY
AT ROTA ISLAND...
HIGH TIDE 1.9 FEET AT 6:11 AM SUNDAY
LOW TIDE 0.5 FEET AT 12:12 PM SUNDAY
HIGH TIDE 2.1 FEET AT 6:27 PM SUNDAY
LOW TIDE 0.4 FEET AT 12:52 AM MONDAY
HIGH TIDE 2.0 FEET AT 7:00 AM MONDAY
LOW TIDE 0.7 FEET AT 12:50 PM MONDAY
HIGH TIDE 2.1 FEET AT 6:45 PM MONDAY
AT TINIAN ISLAND...
HIGH TIDE 1.3 FEET AT 5:22 AM SUNDAY
LOW TIDE 0.4 FEET AT 11:32 AM SUNDAY
HIGH TIDE 1.5 FEET AT 5:48 PM SUNDAY
LOW TIDE 0.3 FEET AT 12:26 AM MONDAY
HIGH TIDE 1.3 FEET AT 6:26 AM MONDAY
LOW TIDE 0.6 FEET AT 12:09 PM MONDAY
HIGH TIDE 1.5 FEET AT 6:04 PM MONDAY
AT TANAPAG HARBOR, SAIPAN...
HIGH TIDE 1.9 FEET AT 6:25 AM SUNDAY
LOW TIDE 0.6 FEET AT 12:17 PM SUNDAY
HIGH TIDE 2.1 FEET AT 6:35 PM SUNDAY
LOW TIDE 0.5 FEET AT 12:57 AM MONDAY
HIGH TIDE 1.9 FEET AT 7:16 AM MONDAY
LOW TIDE 0.8 FEET AT 12:57 PM MONDAY
HIGH TIDE 2.1 FEET AT 6:56 PM MONDAY
* 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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