879
FZPQ50 PGUM 120600
SRFGUM

Surf Zone Forecast for the Mariana Islands
National Weather Service Tiyan GU
400 PM ChST Sat Jul 12 2025

.DISCUSSION...There is a moderate risk of rip currents along east
facing reefs and a low risk along all over reefs. Also, there is
a moderate risk of lightning for all of the Marianas. As the
monsoon trough continues to develop over the next week, the surf
along south and west facing reefs may rise enough to bring the
risk of rip currents to moderate.

$$

GUZ001-MPZ001>003-121945-
Guam-Rota-Tinian-Saipan-
400 PM ChST Sat Jul 12 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 3 feet.
      East  facing reefs............5 to 7 feet.
      South facing reefs............2 to 4 feet.
      West  facing reefs............2 to 3 feet.
Swell/Period
      Primary swell................Southeast at 3 to 5 feet.
      Primary period...............8 seconds.
      Secondary swell..............Southwest at 1 to 2 feet.
      Secondary period.............8 seconds.
Water Temperature
      Ritidian buoy.......... 86 Degrees.
Winds...............Southeast at 10 to 15 mph.

.SUNDAY...
Rip Current Risk.....Moderate *.
Surf Height
      North facing reefs............2 to 3 feet.
      East  facing reefs............4 to 6 feet.
      South facing reefs............2 to 4 feet.
      West  facing reefs............2 to 3 feet.
Swell/Period
      Primary swell................East at 3 to 5 feet.
      Primary period...............8 seconds.
      Secondary swell..............Southwest at 1 to 2 feet.
      Secondary period.............8 seconds.
Max Heat Index.........Around 99.
Winds...............Southeast at 10 to 15 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............2 to 4 feet.
      West  facing reefs............2 to 3 feet.
Swell/Period
      Primary swell................East at 2 to 4 feet.
      Primary period...............8 seconds.
      Secondary swell..............Southwest at around 2 feet.
      Secondary period.............8 seconds.
Winds...............Southeast at around 10 mph.


Tide information for the next 36 hours...

At Apra Harbor, Guam...
High tide  2.6 feet at 10:08 PM Saturday
Low  tide  1.8 feet at  3:24 AM Sunday
High tide  2.5 feet at  8:05 AM Sunday
Low  tide -0.2 feet at  3:27 PM Sunday
High tide  2.6 feet at 10:40 PM Sunday
Low  tide  1.8 feet at  4:08 AM Monday

At Rota Island...
High tide  2.4 feet at 10:05 PM Saturday
Low  tide  1.7 feet at  3:18 AM Sunday
High tide  2.4 feet at  8:02 AM Sunday
Low  tide -0.2 feet at  3:21 PM Sunday
High tide  2.4 feet at 10:37 PM Sunday
Low  tide  1.7 feet at  4:02 AM Monday

At Tinian Island...
High tide  1.7 feet at 10:20 PM Saturday
Low  tide  1.5 feet at  2:37 AM Sunday
High tide  1.8 feet at  7:00 AM Sunday
Low  tide -0.3 feet at  3:04 PM Sunday
High tide  1.7 feet at 10:44 PM Sunday
Low  tide  1.4 feet at  3:32 AM Monday

At Tanapag Harbor, Saipan...
High tide  2.2 feet at 10:45 PM Saturday
Low  tide  1.7 feet at  3:41 AM Sunday
High tide  2.1 feet at  7:54 AM Sunday
Low  tide -0.4 feet at  3:36 PM Sunday
High tide  2.3 feet at 11:16 PM Sunday
Low  tide  1.6 feet at  4:28 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.

$$