289
FZPQ50 PGUM 091845
SRFGUM

Surf Zone Forecast for the Mariana Islands
National Weather Service Tiyan GU
445 AM ChST Wed Dec 10 2025

.DISCUSSION...There will be a moderate risk of rip currents along
north and east facing reefs the next couple of days, which could
then become high.

$$

GUZ001-MPZ001>003-100945-
Guam-Rota-Tinian-Saipan-
445 AM ChST Wed Dec 10 2025

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

.TODAY...
Rip Current Risk.....Moderate *.
Surf Height
      North facing reefs............6 to 8 feet.
      East  facing reefs............6 to 8 feet.
      South facing reefs............2 to 4 feet.
      West  facing reefs............2 to 4 feet.
Swell/Period
      Primary swell................East at 4 to 6 feet.
      Primary period...............9 seconds.
      Secondary swell..............North at around 4 feet.
      Secondary period.............10 seconds.
Water Temperature
      Ritidian buoy..........85 Degrees.
Max Heat Index.........Around 98.
Winds...............East at 10 to 20 mph.

.TONIGHT...
Rip Current Risk.....Moderate *.
Surf Height
      North facing reefs............6 to 8 feet.
      East  facing reefs............6 to 8 feet.
      South facing reefs............2 to 4 feet.
      West  facing reefs............2 to 4 feet.
Swell/Period
      Primary swell................East at 4 to 6 feet.
      Primary period...............9 seconds.
      Secondary swell..............North at around 4 feet.
      Secondary period.............10 seconds.
Winds...............East at 10 to 20 mph.

.THURSDAY...
Rip Current Risk.....Moderate *.
Surf Height
      North facing reefs............6 to 8 feet.
      East  facing reefs............6 to 8 feet.
      South facing reefs............2 to 4 feet.
      West  facing reefs............2 to 4 feet.
Swell/Period
      Primary swell................East at 4 to 6 feet.
      Primary period...............9 seconds.
      Secondary swell..............Northeast at around 4 feet.
      Secondary period.............10 seconds.
Max Heat Index.........Around 98.
Winds...............East at 15 to 20 mph.


Tide information for the next 36 hours...

At Apra Harbor, Guam...
Low  tide -0.5 feet at  5:29 AM Wednesday
High tide  2.1 feet at  1:07 PM Wednesday
Low  tide  1.3 feet at  6:46 PM Wednesday
High tide  1.7 feet at 10:56 PM Wednesday
Low  tide -0.1 feet at  6:20 AM Thursday
High tide  2.1 feet at  1:52 PM Thursday
Low  tide  1.1 feet at  8:00 PM Thursday

At Rota Island...
Low  tide -0.5 feet at  5:23 AM Wednesday
High tide  2.0 feet at  1:04 PM Wednesday
Low  tide  1.2 feet at  6:40 PM Wednesday
High tide  1.6 feet at 10:53 PM Wednesday
Low  tide -0.1 feet at  6:14 AM Thursday
High tide  2.0 feet at  1:49 PM Thursday
Low  tide  1.0 feet at  7:54 PM Thursday

At Tinian Island...
Low  tide -0.2 feet at  5:06 AM Wednesday
High tide  1.6 feet at  1:05 PM Wednesday
Low  tide  0.4 feet at  6:23 PM Wednesday
High tide  1.3 feet at 10:54 PM Wednesday
Low  tide  0.0 feet at  5:57 AM Thursday
High tide  1.6 feet at  1:50 PM Thursday
Low  tide  0.4 feet at  7:37 PM Thursday

At Tanapag Harbor, Saipan...
Low  tide -0.2 feet at  5:36 AM Wednesday
High tide  2.3 feet at  1:18 PM Wednesday
Low  tide  1.4 feet at  7:17 PM Wednesday
High tide  1.7 feet at 11:09 PM Wednesday
Low  tide  0.1 feet at  6:29 AM Thursday
High tide  2.2 feet at  1:59 PM Thursday
Low  tide  1.2 feet at  8:29 PM Thursday

* 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.

$$