050
FZPQ50 PGUM 080831
SRFGUM

Surf Zone Forecast for the Mariana Islands
National Weather Service Tiyan GU
631 PM ChST Mon Dec 8 2025

.DISCUSSION...A moderate risk of rip currents is expected along north
and east facing reefs of the Marianas for at least the next few days,
before surf becomes hazardous once again along north facing reefs in
the second half of the week as a shearline continues to descend toward
the Marianas.

$$

GUZ001-MPZ001>003-082000-
Guam-Rota-Tinian-Saipan-
631 PM ChST Mon Dec 8 2025

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

.TONIGHT...
Rip Current Risk.....Moderate *.
Surf Height
      North facing reefs............5 to 7 feet.
      East  facing reefs............5 to 7 feet.
      South facing reefs............1 to 2 feet.
      West  facing reefs............2 to 4 feet.
Swell/Period
      Primary swell................East at 4 to 5 feet.
      Primary period...............9 seconds.
      Secondary swell..............North at around 3 feet.
      Secondary period.............11 seconds.
Water Temperature
      Ritidian buoy..........85 Degrees.
Winds...............East at 10 to 15 mph.

.TUESDAY...
Rip Current Risk.....Moderate *.
Surf Height
      North facing reefs............6 to 8 feet.
      East  facing reefs............6 to 8 feet.
      South facing reefs............1 to 3 feet.
      West  facing reefs............3 to 4 feet.
Swell/Period
      Primary swell................East at 4 to 6 feet.
      Primary period...............9 seconds.
      Secondary swell..............North at 3 to 4 feet.
      Secondary period.............9 seconds.
Max Heat Index.........Around 98.
Winds...............East at 10 to 15 mph.

.TUESDAY NIGHT...
Rip Current Risk.....Moderate *.
Surf Height
      North facing reefs............5 to 7 feet.
      East  facing reefs............5 to 7 feet.
      South facing reefs............1 to 2 feet.
      West  facing reefs............2 to 4 feet.
Swell/Period
      Primary swell................East at 4 to 5 feet.
      Primary period...............9 seconds.
      Secondary swell..............North at around 3 feet.
      Secondary period.............11 seconds.
Winds...............East at 10 to 15 mph.

Tide information for the next 36 hours...

At Apra Harbor, Guam...
High tide  2.2 feet at  8:58 PM Monday
Low  tide -0.8 feet at  4:38 AM Tuesday
High tide  2.2 feet at 12:16 PM Tuesday
Low  tide  1.4 feet at  5:35 PM Tuesday
High tide  2.0 feet at  9:52 PM Tuesday
Low  tide -0.5 feet at  5:29 AM Wednesday

At Rota Island...
High tide  2.1 feet at  8:55 PM Monday
Low  tide -0.8 feet at  4:32 AM Tuesday
High tide  2.0 feet at 12:13 PM Tuesday
Low  tide  1.3 feet at  5:29 PM Tuesday
High tide  1.9 feet at  9:49 PM Tuesday
Low  tide -0.5 feet at  5:23 AM Wednesday

At Tinian Island...
High tide  1.6 feet at  8:56 PM Monday
Low  tide -0.3 feet at  4:15 AM Tuesday
High tide  1.6 feet at 12:14 PM Tuesday
Low  tide  0.5 feet at  5:12 PM Tuesday
High tide  1.5 feet at  9:50 PM Tuesday
Low  tide -0.2 feet at  5:06 AM Wednesday

At Tanapag Harbor, Saipan...
High tide  2.1 feet at  8:53 PM Monday
Low  tide -0.5 feet at  4:42 AM Tuesday
High tide  2.4 feet at 12:34 PM Tuesday
Low  tide  1.6 feet at  6:03 PM Tuesday
High tide  1.9 feet at  9:52 PM Tuesday
Low  tide -0.2 feet at  5:36 AM 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. Rip currents
will be life threatening. If caught in a rip current, swim parallel
to the beach rather than against the current.

$$