343
FZPQ50 PGUM 311815
SRFGUM

Surf Zone Forecast for the Mariana Islands
National Weather Service Tiyan GU
415 AM ChST Mon Sep 1 2025

.DISCUSSION...There will be a moderate risk of rip currents along
south facing reefs of the Marianas through tonight, which could at
times reach around to east facing reefs. After this, lowering waves
will bring the rip current risk to low.

$$

GUZ001-MPZ001>003-010915-
Guam-Rota-Tinian-Saipan-
415 AM ChST Mon Sep 1 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............Around 1 foot.
      East  facing reefs............2 to 4 feet.
      South facing reefs............4 to 6 feet.
      West  facing reefs............2 to 4 feet.
Swell/Period
      Primary swell................South at 3 to 4 feet.
      Primary period...............8 seconds.
Water Temperature
      Ritidian buoy..........86 Degrees.
Max Heat Index.........Around 99.
Winds...............East at around 10 mph.

.TONIGHT...
Rip Current Risk.....Moderate *.
Surf Height
      North facing reefs............Around 1 foot.
      East  facing reefs............1 to 3 feet.
      South facing reefs............3 to 5 feet.
      West  facing reefs............1 to 3 feet.
Swell/Period
      Primary swell................South at 2 to 4 feet.
      Primary period...............8 seconds.
Winds...............Northeast at 10 to 20 mph.

.TUESDAY...
Rip Current Risk.....Low *.
Surf Height
      North facing reefs............Around 1 foot.
      East  facing reefs............2 to 4 feet.
      South facing reefs............2 to 4 feet.
      West  facing reefs............Around 1 foot.
Swell/Period
      Primary swell................Southeast at 1 to 3 feet.
      Primary period...............8 seconds.
Max Heat Index.........Around 100.
Winds...............East at 10 to 20 mph.


Tide information for the next 36 hours...

At Apra Harbor, Guam...
Low  tide  0.4 feet at  8:01 AM Monday
High tide  2.0 feet at  4:24 PM Monday
Low  tide  1.8 feet at  8:43 PM Monday
High tide  2.0 feet at 12:59 AM Tuesday
Low  tide  0.3 feet at  9:08 AM Tuesday
High tide  2.1 feet at  5:26 PM Tuesday
Low  tide  1.8 feet at 10:09 PM Tuesday

At Rota Island...
Low  tide  0.3 feet at  7:55 AM Monday
High tide  1.9 feet at  4:21 PM Monday
Low  tide  1.7 feet at  8:37 PM Monday
High tide  1.9 feet at 12:56 AM Tuesday
Low  tide  0.3 feet at  9:02 AM Tuesday
High tide  1.9 feet at  5:23 PM Tuesday
Low  tide  1.6 feet at 10:03 PM Tuesday

At Tinian Island...
Low  tide  0.1 feet at  8:00 AM Monday
High tide  1.4 feet at  4:46 PM Monday
Low  tide  1.3 feet at  7:34 PM Monday
High tide  1.5 feet at 12:05 AM Tuesday
Low  tide  0.0 feet at  9:00 AM Tuesday
High tide  1.4 feet at  5:34 PM Tuesday
Low  tide  1.3 feet at  8:55 PM Tuesday

At Tanapag Harbor, Saipan...
Low  tide  0.3 feet at  8:21 AM Monday
High tide  1.7 feet at  5:09 PM Monday
Low  tide  1.6 feet at  7:50 PM Monday
High tide  1.9 feet at 12:43 AM Tuesday
Low  tide  0.2 feet at  9:25 AM Tuesday
High tide  1.8 feet at  5:56 PM Tuesday
Low  tide  1.7 feet at  9:35 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.

$$