807
FZPQ50 PGUM 291801
SRFGUM

Surf Zone Forecast for the Mariana Islands
National Weather Service Tiyan GU
401 AM ChST Mon Jun 30 2025

.DISCUSSION...A moderate risk of rip currents is expected along east
facing reefs for at least the next several days. The rip current
risk could briefly become moderate along west reefs starting Tuesday.
A moderate risk of lightning is expected for the next few days.

$$

GUZ001-MPZ001>003-300915-
Guam-Rota-Tinian-Saipan-
401 AM ChST Mon Jun 30 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............2 to 4 feet.
      East  facing reefs............3 to 5 feet.
      South facing reefs............2 to 3 feet.
      West  facing reefs............3 to 4 feet.
Swell/Period
      Primary swell................East at 3 to 4 feet.
      Primary period...............8 seconds.
      Secondary swell..............Southwest at around 3 feet.
      Secondary period.............8 seconds.
Water Temperature
      Ritidian buoy..........86 Degrees.
Max Heat Index.........Around 100.
Winds...............South at 10 to 20 mph.

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

.TUESDAY...
Rip Current Risk.....Moderate *.
Surf Height
      North facing reefs............1 to 3 feet.
      East  facing reefs............4 to 5 feet.
      South facing reefs............2 to 4 feet.
      West  facing reefs............3 to 5 feet.
Swell/Period
      Primary swell................East at around 4 feet.
      Primary period...............8 seconds.
      Secondary swell..............Southwest at around 4 feet.
      Secondary period.............8 seconds.
Max Heat Index.........Around 98.
Winds...............Southwest at 10 to 20 mph.


Tide information for the next 36 hours...

At Apra Harbor, Guam...
High tide  2.3 feet at 10:11 AM Monday
Low  tide  0.3 feet at  5:25 PM Monday
High tide  2.5 feet at 12:38 AM Tuesday
Low  tide  1.5 feet at  6:36 AM Tuesday
High tide  2.1 feet at 11:13 AM Tuesday
Low  tide  0.6 feet at  6:04 PM Tuesday

At Rota Island...
High tide  2.1 feet at 10:08 AM Monday
Low  tide  0.2 feet at  5:19 PM Monday
High tide  2.4 feet at 12:35 AM Tuesday
Low  tide  1.4 feet at  6:30 AM Tuesday
High tide  2.0 feet at 11:10 AM Tuesday
Low  tide  0.6 feet at  5:58 PM Tuesday

At Tinian Island...
High tide  1.5 feet at  9:17 AM Monday
Low  tide  0.0 feet at  4:57 PM Monday
High tide  1.7 feet at 12:24 AM Tuesday
Low  tide  1.1 feet at  6:22 AM Tuesday
High tide  1.3 feet at 10:28 AM Tuesday
Low  tide  0.3 feet at  5:33 PM Tuesday

At Tanapag Harbor, Saipan...
High tide  1.7 feet at 10:21 AM Monday
Low  tide  0.0 feet at  5:33 PM Monday
High tide  2.3 feet at 12:58 AM Tuesday
Low  tide  1.2 feet at  7:13 AM Tuesday
High tide  1.6 feet at 11:33 AM Tuesday
Low  tide  0.3 feet at  6:12 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. If caught in a
rip current, swim parallel to the beach rather than against the
current.

$$