627
FZPQ50 PGUM 161823
SRFGUM

Surf Zone Forecast for the Mariana Islands
National Weather Service Tiyan GU
423 AM ChST Tue Jun 17 2025

.DISCUSSION...There will be a low risk of rip currents along
all reefs and beaches through Wednesday. Surf will rise midweek
along east facing reefs, reaching to between 3 and 5 feet by
Wednesday night. There will be a moderate risk of lightning along
western shores of Guam through Wednesday night. The trade swell is
anticipated to strengthen Wednesday night into Thursday morning, and
this will cause the surf along east facing reefs to rise to 3 to 5
feet which will bring the risk of rip currents up to moderate. The
trade swell may fall by a foot or so over the weekend.

$$

GUZ001-MPZ001>003-171000-
Guam-Rota-Tinian-Saipan-
423 AM ChST Tue Jun 17 2025

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

.TODAY...
Rip Current Risk.....Low  *.
Surf Height
      North facing reefs............1 to 3 feet.
      East  facing reefs............2 to 4 feet.
      South facing reefs............1 to 2 feet.
      West  facing reefs............Around 1 foot.
Swell/Period
      Primary swell................East at 1 to 3 feet.
      Primary period...............8 seconds.
Water Temperature
      Ritidian buoy..........85 Degrees.
Max Heat Index.........Around 101.
Winds...............East at around 10 mph.

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

.WEDNESDAY...
Rip Current Risk.....Low  *.
Surf Height
      North facing reefs............1 to 3 feet.
      East  facing reefs............2 to 4 feet.
      South facing reefs............1 to 2 feet.
      West  facing reefs............Around 1 foot.
Swell/Period
      Primary swell................East at 2 to 3 feet.
      Primary period...............8 seconds.
Max Heat Index.........Around 102.
Winds...............East at 10 to 15 mph.


Tide information for the next 36 hours...

At Apra Harbor, Guam...
Low  tide  1.8 feet at  6:22 AM Tuesday
High tide  2.2 feet at 10:41 AM Tuesday
Low  tide  0.2 feet at  5:55 PM Tuesday
High tide  2.6 feet at  1:12 AM Wednesday
Low  tide  1.5 feet at  7:20 AM Wednesday
High tide  2.1 feet at 11:56 AM Wednesday

At Rota Island...
Low  tide  1.7 feet at  6:16 AM Tuesday
High tide  2.1 feet at 10:38 AM Tuesday
Low  tide  0.2 feet at  5:49 PM Tuesday
High tide  2.5 feet at  1:09 AM Wednesday
Low  tide  1.5 feet at  7:14 AM Wednesday
High tide  2.0 feet at 11:53 AM Wednesday

At Tinian Island...
Low  tide  1.3 feet at  6:04 AM Tuesday
High tide  1.5 feet at  9:42 AM Tuesday
Low  tide  0.0 feet at  5:28 PM Tuesday
High tide  1.7 feet at  1:01 AM Wednesday
Low  tide  1.1 feet at  7:08 AM Wednesday
High tide  1.3 feet at 11:12 AM Wednesday

At Tanapag Harbor, Saipan...
Low  tide  1.5 feet at  7:00 AM Tuesday
High tide  1.7 feet at 10:35 AM Tuesday
Low  tide -0.1 feet at  6:02 PM Tuesday
High tide  2.3 feet at  1:28 AM Wednesday
Low  tide  1.2 feet at  7:50 AM Wednesday
High tide  1.6 feet at 12:05 PM Wednesday

* 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.

$$