813
FZPQ50 PGUM 211822
SRFGUM

Surf Zone Forecast for the Mariana Islands
National Weather Service Tiyan GU
422 AM ChST Fri Aug 22 2025

.DISCUSSION...There will be a low risk of rip currents along all
reefs of the Marianas and a moderate risk of lightning through at
least Tuesday.

$$

GUZ001-MPZ001>003-220930-
Guam-Rota-Tinian-Saipan-
422 AM ChST Fri Aug 22 2025

36 hour Surf Zone Forecast for the Marianas from 600 AM Friday
through 600 PM Saturday

.TODAY...
Rip Current Risk.....Low *.
Surf Height
      North facing reefs............1 to 3 feet.
      East  facing reefs............3 to 4 feet.
      South facing reefs............1 to 3 feet.
      West  facing reefs............Around 1 foot.
Swell/Period
      Primary swell................East at 1 to 3 feet.
      Primary period...............8 seconds.
Water Temperature
      Ritidian buoy..........86 Degrees.
Max Heat Index.........Around 101.
Winds...............East at around 10 mph.

.TONIGHT...
Rip Current Risk.....Low *.
Surf Height
      North facing reefs............1 to 3 feet.
      East  facing reefs............3 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...............8 seconds.
Winds...............East at around 10 mph.

.SATURDAY...
Rip Current Risk.....Low *.
Surf Height
      North facing reefs............1 to 3 feet.
      East  facing reefs............3 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...............8 seconds.
Max Heat Index.........Around 102.
Winds...............Light and variable.


Tide information for the next 36 hours...

At Apra Harbor, Guam...
High tide  2.5 feet at  5:56 AM Friday
Low  tide -0.2 feet at  1:12 PM Friday
High tide  2.5 feet at  8:12 PM Friday
Low  tide  1.4 feet at  1:39 AM Saturday
High tide  2.5 feet at  6:48 AM Saturday
Low  tide -0.1 feet at  1:54 PM Saturday
High tide  2.5 feet at  8:40 PM Saturday

At Rota Island...
High tide  2.4 feet at  5:53 AM Friday
Low  tide -0.2 feet at  1:06 PM Friday
High tide  2.3 feet at  8:09 PM Friday
Low  tide  1.4 feet at  1:33 AM Saturday
High tide  2.4 feet at  6:45 AM Saturday
Low  tide -0.1 feet at  1:48 PM Saturday
High tide  2.3 feet at  8:37 PM Saturday

At Tinian Island...
High tide  1.8 feet at  4:51 AM Friday
Low  tide -0.3 feet at 12:42 PM Friday
High tide  1.6 feet at  7:56 PM Friday
Low  tide  1.1 feet at 12:49 AM Saturday
High tide  1.8 feet at  5:50 AM Saturday
Low  tide -0.2 feet at  1:24 PM Saturday
High tide  1.6 feet at  8:21 PM Saturday

At Tanapag Harbor, Saipan...
High tide  2.2 feet at  5:54 AM Friday
Low  tide -0.3 feet at  1:17 PM Friday
High tide  2.2 feet at  8:28 PM Friday
Low  tide  1.3 feet at  1:46 AM Saturday
High tide  2.1 feet at  6:52 AM Saturday
Low  tide -0.2 feet at  2:03 PM Saturday
High tide  2.2 feet at  8:58 PM Saturday

* 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.

$$