856
FZPQ50 PGUM 300739
SRFGUM

Surf Zone Forecast for the Mariana Islands
National Weather Service Tiyan GU
539 PM ChST Sat Aug 30 2025

.DISCUSSION...A moderate risk of rip currents is expected along east
facing reefs for at least the next several days. As trade swell and
wind waves decrease, surf will diminish further along all reefs,
allowing rip current risk to potentially become low along east
facing reefs toward next weekend. A moderate risk of lightning is
expected through Sunday.

$$

GUZ001-MPZ001>003-302000-
Guam-Rota-Tinian-Saipan-
539 PM ChST Sat Aug 30 2025

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

.TONIGHT...
Rip Current Risk.....Moderate *.
Surf Height
      North facing reefs............2 to 4 feet.
      East  facing reefs............5 to 7 feet.
      South facing reefs............2 to 4 feet.
      West  facing reefs............1 to 2 feet.
Swell/Period
      Primary swell................East at 4 to 6 feet.
      Primary period...............8 seconds.
Water Temperature
      Ritidian buoy..........86 Degrees.
Winds...............Breezy. South at 15 to 25 mph with gusts to
30 mph near heavier showers.
.SUNDAY...
Rip Current Risk.....Moderate *.
Surf Height
      North facing reefs............2 to 4 feet.
      East  facing reefs............5 to 7 feet.
      South facing reefs............2 to 4 feet.
      West  facing reefs............1 to 2 feet.
Swell/Period
      Primary swell................East at 4 to 6 feet.
      Primary period...............8 seconds.
Max Heat Index.........Around 98.
Winds...............South at 10 to 20 mph.

.SUNDAY NIGHT...
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............1 to 2 feet.
Swell/Period
      Primary swell................East at 4 to 5 feet.
      Primary period...............8 seconds.
Winds...............Southeast at around 10 mph.

Tide information for the next 36 hours...

At Apra Harbor, Guam...
Low  tide  1.6 feet at  6:04 PM Saturday
High tide  2.1 feet at 11:21 PM Saturday
Low  tide  0.4 feet at  6:59 AM Sunday
High tide  1.9 feet at  2:50 PM Sunday
Low  tide  1.7 feet at  7:09 PM Sunday
High tide  2.0 feet at 12:01 AM Monday

At Rota Island...
Low  tide  1.5 feet at  5:58 PM Saturday
High tide  2.0 feet at 11:18 PM Saturday
Low  tide  0.4 feet at  6:53 AM Sunday
High tide  1.8 feet at  2:47 PM Sunday
Low  tide  1.6 feet at  7:03 PM Sunday
High tide  1.9 feet at 11:58 PM Sunday

At Tinian Island...
High tide  1.5 feet at 10:38 PM Saturday
Low  tide  0.1 feet at  7:00 AM Sunday
High tide  1.3 feet at  3:25 PM Sunday
Low  tide  1.3 feet at  6:07 PM Sunday
High tide  1.5 feet at 11:14 PM Sunday
Low  tide  0.1 feet at  8:00 AM Monday

At Tanapag Harbor, Saipan...
Low  tide  1.4 feet at  5:41 PM Saturday
High tide  1.9 feet at 11:32 PM Saturday
Low  tide  0.4 feet at  7:20 AM Sunday
High tide  1.6 feet at  3:12 PM Sunday
Low  tide  1.5 feet at  6:30 PM Sunday
High tide  1.9 feet at 12:03 AM 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.

$$