527
FZPQ50 PGUM 130632
SRFGUM

Surf Zone Forecast for the Mariana Islands
National Weather Service Tiyan GU
432 PM ChST Sun Jul 13 2025

.DISCUSSION...There will be a moderate risk of rip currents along
east facing reefs of the Marianas through at least Tuesday. On
Tuesday, a moderate risk will likely commence along south and west
facing reefs as the westerly swell builds. There will also be a
moderate risk of lightning tonight, and decreasing Monday and Tuesday,
before increasing again later in the week.

$$

GUZ001-MPZ001>003-132200-
Guam-Rota-Tinian-Saipan-
432 PM ChST Sun Jul 13 2025

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

.TONIGHT...
Rip Current Risk.....Moderate *.
Surf Height
      North facing reefs............2 to 3 feet.
      East  facing reefs............5 to 7 feet.
      South facing reefs............2 to 4 feet.
      West  facing reefs............2 to 4 feet.
Swell/Period
      Primary swell................East at 3 to 5 feet.
      Primary period...............8 seconds.
      Secondary swell..............Southwest at around 2 feet.
      Secondary period.............8 seconds.
Water Temperature
      Ritidian buoy..........86 Degrees.
Winds...............Southeast at 10 to 15 mph.

.MONDAY...
Rip Current Risk.....Moderate *.
Surf Height
      North facing reefs............2 to 3 feet.
      East  facing reefs............5 to 7 feet.
      South facing reefs............2 to 4 feet.
      West  facing reefs............2 to 4 feet.
Swell/Period
      Primary swell................East at 3 to 5 feet.
      Primary period...............9 seconds.
      Secondary swell..............West at around 2 feet.
      Secondary period.............8 seconds.
Max Heat Index.........Around 101.
Winds...............Southeast at 10 to 15 mph.

.MONDAY NIGHT...
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............2 to 4 feet.
Swell/Period
      Primary swell................East at 3 to 5 feet.
      Primary period...............9 seconds.
      Secondary swell..............West at around 2 feet.
      Secondary period.............8 seconds.
Winds...............Southeast at 10 to 15 mph.


Tide information for the next 36 hours...

At Apra Harbor, Guam...
High tide  2.6 feet at 10:40 PM Sunday
Low  tide  1.8 feet at  4:08 AM Monday
High tide  2.5 feet at  8:52 AM Monday
Low  tide  0.0 feet at  4:06 PM Monday
High tide  2.6 feet at 11:11 PM Monday
Low  tide  1.6 feet at  4:56 AM Tuesday

At Rota Island...
High tide  2.4 feet at 10:37 PM Sunday
Low  tide  1.7 feet at  4:02 AM Monday
High tide  2.4 feet at  8:49 AM Monday
Low  tide  0.0 feet at  4:00 PM Monday
High tide  2.5 feet at 11:08 PM Monday
Low  tide  1.5 feet at  4:50 AM Tuesday

At Tinian Island...
High tide  1.7 feet at 10:44 PM Sunday
Low  tide  1.4 feet at  3:32 AM Monday
High tide  1.7 feet at  7:52 AM Monday
Low  tide -0.2 feet at  3:41 PM Monday
High tide  1.7 feet at 11:05 PM Monday
Low  tide  1.2 feet at  4:30 AM Tuesday

At Tanapag Harbor, Saipan...
High tide  2.3 feet at 11:16 PM Sunday
Low  tide  1.6 feet at  4:28 AM Monday
High tide  2.0 feet at  8:47 AM Monday
Low  tide -0.3 feet at  4:14 PM Monday
High tide  2.3 feet at 11:43 PM Monday
Low  tide  1.4 feet at  5:19 AM 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.

$$