002
FZPQ50 PGUM 091805
SRFGUM

Surf Zone Forecast for the Mariana Islands
National Weather Service Tiyan GU
405 AM ChST Sun Aug 10 2025

.DISCUSSION...There will be a low risk of rip currents along all
reefs through tonight. As the trade swell increases slightly
tonight into Monday morning, the rip current risk is expected
to increase to moderate along east facing reefs. There will be
moderate risk of lightning through tonight.

$$

GUZ001-MPZ001>003-101000-
Guam-Rota-Tinian-Saipan-
405 AM ChST Sun Aug 10 2025

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

.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 2 feet.
      West  facing reefs............Around 1 foot.
Swell/Period
      Primary swell................East at 2 to 3 feet.
      Primary period...............8 seconds.
Water Temperature
      Ritidian buoy..........86 Degrees.
Max Heat Index.........Around 100.
Winds...............East at 10 to 15 mph.

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

.MONDAY...
Rip Current Risk.....Moderate *.
Surf Height
      North facing reefs............2 to 4 feet.
      East  facing reefs............3 to 5 feet.
      South facing reefs............2 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 101.
Winds...............East at around 10 mph.


Tide information for the next 36 hours...

At Apra Harbor, Guam...
High tide  2.6 feet at  7:18 AM Sunday
Low  tide -0.1 feet at  2:26 PM Sunday
High tide  2.6 feet at  9:18 PM Sunday
Low  tide  1.5 feet at  2:52 AM Monday
High tide  2.6 feet at  8:06 AM Monday
Low  tide  0.0 feet at  3:04 PM Monday

At Rota Island...
High tide  2.5 feet at  7:15 AM Sunday
Low  tide -0.1 feet at  2:20 PM Sunday
High tide  2.4 feet at  9:15 PM Sunday
Low  tide  1.4 feet at  2:46 AM Monday
High tide  2.5 feet at  8:03 AM Monday
Low  tide  0.0 feet at  2:58 PM Monday

At Tinian Island...
High tide  1.8 feet at  6:19 AM Sunday
Low  tide -0.2 feet at  2:00 PM Sunday
High tide  1.6 feet at  9:07 PM Sunday
Low  tide  1.2 feet at  2:12 AM Monday
High tide  1.7 feet at  7:12 AM Monday
Low  tide -0.1 feet at  2:36 PM Monday

At Tanapag Harbor, Saipan...
High tide  2.1 feet at  7:14 AM Sunday
Low  tide -0.3 feet at  2:37 PM Sunday
High tide  2.2 feet at  9:46 PM Sunday
Low  tide  1.3 feet at  3:05 AM Monday
High tide  2.1 feet at  8:09 AM Monday
Low  tide -0.2 feet at  3:14 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.

$$