362
FZPQ50 PGUM 171800
SRFGUM

Surf Zone Forecast for the Mariana Islands
National Weather Service Tiyan GU
400 AM ChST Mon Aug 18 2025

.DISCUSSION...There will be a moderate risk of rip currents along
east facing reefs for the next few days and remain low along all
other reefs. Surf will gradually subside through the week, allowing
the rip current risk to become low along all reefs by the end of the
week.

$$

GUZ001-MPZ001>003-180900-
Guam-Rota-Tinian-Saipan-
400 AM ChST Mon Aug 18 2025

36 hour Surf Zone Forecast for the Marianas from 600 AM Monday
through 600 PM Tuesday

.TODAY...
Rip Current Risk.....Moderate *.
Surf Height
      North facing reefs............2 to 4 feet.
      East  facing reefs............4 to 6 feet.
      South facing reefs............1 to 3 feet.
      West  facing reefs............Around 1 foot.
Swell/Period
      Primary swell................East at 3 to 4 feet.
      Primary period...............8 seconds.
Water Temperature
      Ritidian buoy..........86 Degrees.
Max Heat Index.........Around 102.
Winds...............East at 10 to 15 mph.

.TONIGHT...
Rip Current Risk.....Moderate *.
Surf Height
      North facing reefs............2 to 4 feet.
      East  facing reefs............4 to 6 feet.
      South facing reefs............1 to 3 feet.
      West  facing reefs............Around 1 foot.
Swell/Period
      Primary swell................Northeast at 2 to 4 feet.
      Primary period...............8 seconds.
Winds...............East at 10 to 20 mph.

.TUESDAY...
Rip Current Risk.....Moderate *.
Surf Height
      North facing reefs............2 to 4 feet.
      East  facing reefs............4 to 6 feet.
      South facing reefs............1 to 3 feet.
      West  facing reefs............Around 1 foot.
Swell/Period
      Primary swell................East at 2 to 4 feet.
      Primary period...............8 seconds.
Max Heat Index.........Around 102.
Winds...............Southeast at 10 to 20 mph.


Tide information for the next 36 hours...

At Apra Harbor, Guam...
Low  tide -0.1 feet at  9:21 AM Monday
High tide  2.3 feet at  5:20 PM Monday
Low  tide  1.9 feet at  9:43 PM Monday
High tide  2.4 feet at  2:28 AM Tuesday
Low  tide -0.2 feet at 10:28 AM Tuesday
High tide  2.4 feet at  6:19 PM Tuesday

At Rota Island...
Low  tide  0.0 feet at  9:15 AM Monday
High tide  2.1 feet at  5:17 PM Monday
Low  tide  1.8 feet at  9:37 PM Monday
High tide  2.3 feet at  2:25 AM Tuesday
Low  tide -0.2 feet at 10:22 AM Tuesday
High tide  2.2 feet at  6:16 PM Tuesday

At Tinian Island...
Low  tide -0.3 feet at  9:05 AM Monday
High tide  1.5 feet at  5:22 PM Monday
Low  tide  1.4 feet at  8:35 PM Monday
High tide  1.8 feet at  1:35 AM Tuesday
Low  tide -0.4 feet at 10:06 AM Tuesday
High tide  1.6 feet at  6:14 PM Tuesday

At Tanapag Harbor, Saipan...
Low  tide -0.3 feet at  9:30 AM Monday
High tide  2.0 feet at  5:42 PM Monday
Low  tide  1.7 feet at  9:32 PM Monday
High tide  2.2 feet at  2:07 AM Tuesday
Low  tide -0.4 feet at 10:33 AM Tuesday
High tide  2.1 feet at  6:37 PM Tuesday

* 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.

$$