450
FZPQ50 PGUM 120600
SRFGUM

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

.DISCUSSION...A moderate risk of rip currents is expected along
west, north, and east facing reefs of the Marianas through tonight.
As various swells (trade swell, northerly swell, westerly swell)
begin to diminish, surf will drop enough to allow the rip current
risk to become low, first along west facing reefs Thursday, then along
north facing reefs Thursday night. Surf along east facing reefs may
increase as the trade swell builds by a foot or two over the weekend.

$$

GUZ001-MPZ001>003-121915-
Guam-Rota-Tinian-Saipan-
400 PM ChST Wed Nov 12 2025

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

.TONIGHT...
Rip Current Risk.....Moderate *.
Surf Height
      North facing reefs............4 to 6 feet.
      East  facing reefs............4 to 6 feet.
      South facing reefs............2 to 3 feet.
      West  facing reefs............4 to 6 feet.
Swell/Period
      Primary swell................East at 2 to 4 feet.
      Primary period...............8 seconds.
      Secondary swell..............North at around 3 feet.
      Secondary period.............12 seconds.
Water Temperature
      Ritidian buoy..........86 Degrees.
Winds...............East at 10 to 15 mph.

.THURSDAY...
Rip Current Risk.....Moderate *.
Surf Height
      North facing reefs............3 to 5 feet.
      East  facing reefs............4 to 6 feet.
      South facing reefs............2 to 3 feet.
      West  facing reefs............2 to 4 feet.
Swell/Period
      Primary swell................East at 2 to 4 feet.
      Primary period...............8 seconds.
      Secondary swell..............North at around 2 feet.
      Secondary period.............11 seconds.
Max Heat Index.........Around 99.
Winds...............East at 10 to 15 mph.

.THURSDAY NIGHT...
Rip Current Risk.....Moderate *.
Surf Height
      North facing reefs............2 to 4 feet.
      East  facing reefs............4 to 6 feet.
      South facing reefs............1 to 3 feet.
      West  facing reefs............2 to 4 feet.
Swell/Period
      Primary swell................East at 3 to 4 feet.
      Primary period...............8 seconds.
      Secondary swell..............North at around 2 feet.
      Secondary period.............11 seconds.
Winds...............East at 10 to 15 mph.


Tide information for the next 36 hours...

At Apra Harbor, Guam...
Low  tide  1.3 feet at  8:41 PM Wednesday
High tide  1.6 feet at 12:35 AM Thursday
Low  tide  0.0 feet at  8:02 AM Thursday
High tide  2.2 feet at  3:38 PM Thursday
Low  tide  1.1 feet at  9:50 PM Thursday
High tide  1.5 feet at  2:26 AM Friday

At Rota Island...
Low  tide  1.3 feet at  8:35 PM Wednesday
High tide  1.5 feet at 12:32 AM Thursday
Low  tide  0.0 feet at  7:56 AM Thursday
High tide  2.0 feet at  3:35 PM Thursday
Low  tide  1.0 feet at  9:44 PM Thursday
High tide  1.5 feet at  2:23 AM Friday

At Tinian Island...
Low  tide  1.1 feet at  8:02 PM Wednesday
High tide  1.3 feet at 11:42 PM Wednesday
Low  tide -0.1 feet at  7:34 AM Thursday
High tide  1.6 feet at  3:08 PM Thursday
Low  tide  0.9 feet at  9:09 PM Thursday
High tide  1.2 feet at  1:18 AM Friday

At Tanapag Harbor, Saipan...
Low  tide  1.4 feet at  9:11 PM Wednesday
High tide  1.6 feet at 12:49 AM Thursday
Low  tide  0.2 feet at  8:11 AM Thursday
High tide  2.2 feet at  3:46 PM Thursday
Low  tide  1.1 feet at 10:08 PM Thursday
High tide  1.5 feet at  2:38 AM Friday

* 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.

$$