459
FZPQ50 PGUM 301740
SRFGUM

Surf Zone Forecast for the Mariana Islands
National Weather Service Tiyan GU
340 AM ChST Sun Aug 31 2025

.DISCUSSION...There will be a moderate risk of rip currents along
east facing reefs of the Marianas through at least Wednesday. After
Wednesday, diminishing trade swell and wind waves could allow the
risk of rip currents to become low along all reefs. A moderate risk
of lightning is expected today, then again on Monday night through
Wednesday.

$$

GUZ001-MPZ001>003-310845-
Guam-Rota-Tinian-Saipan-
340 AM ChST Sun Aug 31 2025

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

.TODAY...
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................Southeast at 5 to 6 feet.
      Primary period...............8 seconds.
Water Temperature
      Ritidian buoy..........86 Degrees.
Max Heat Index.........Around 98.
Winds...............South at 10 to 20 mph.

.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................Southeast at 4 to 5 feet.
      Primary period...............8 seconds.
Winds...............Southeast at around 10 mph.

.MONDAY...
Rip Current Risk.....Moderate *.
Surf Height
      North facing reefs............2 to 4 feet.
      East  facing reefs............4 to 6 feet.
      South facing reefs............2 to 4 feet.
      West  facing reefs............1 to 2 feet.
Swell/Period
      Primary swell................Southeast at 3 to 4 feet.
      Primary period...............8 seconds.
Max Heat Index.........Around 100.
Winds...............Northeast at 10 to 20 mph.


Tide information for the next 36 hours...

At Apra Harbor, Guam...
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
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

At Rota Island...
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
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

At Tinian Island...
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
High tide  1.4 feet at  4:46 PM Monday
Low  tide  1.3 feet at  7:34 PM Monday

At Tanapag Harbor, Saipan...
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  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

* 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.

$$