377
FZPQ50 PGUM 061757
SRFGUM

Surf Zone Forecast for the Mariana Islands
National Weather Service Tiyan GU
357 AM ChST Sun Dec 7 2025

.DISCUSSION...Hazardous surf of 9 feet and a high risk of rip
currents along north facing reefs of the Marianas are expected
to subside this afternoon as the pulse in northerly swell diminishes.
Meanwhile, the rip current risk is expected to drop to low along west
facing reefs tonight, while persisting along east facing reefs for
much of next week.

$$

GUZ001-MPZ001>003-070900-
Guam-Rota-Tinian-Saipan-
357 AM ChST Sun Dec 7 2025

...HIGH SURF ADVISORY IN EFFECT UNTIL 4 PM CHST THIS AFTERNOON ALONG
NORTH FACING REEFS...
...HIGH RISK OF RIP CURRENTS THROUGH THIS AFTERNOON ALONG NORTH
FACING REEFS...

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

.TODAY...
Rip Current Risk.....High *.
Surf Height
      North facing reefs............7 to 9 feet.
      East  facing reefs............6 to 8 feet.
      South facing reefs............2 to 3 feet.
      West  facing reefs............3 to 5 feet.
Swell/Period
      Primary swell................East at 3 to 5 feet.
      Primary period...............10 seconds.
      Secondary swell..............North at 3 to 4 feet.
      Secondary period.............10 seconds.
      Tertiary swell...............Northeast at around 3 feet.
      Tertiary period..............12 seconds.
Water Temperature
      Ritidian buoy..........85 Degrees.
Max Heat Index.........Around 100.
Winds...............East at 10 to 15 mph.

.TONIGHT...
Rip Current Risk.....Moderate *.
Surf Height
      North facing reefs............6 to 8 feet.
      East  facing reefs............5 to 7 feet.
      South facing reefs............2 to 3 feet.
      West  facing reefs............3 to 4 feet.
Swell/Period
      Primary swell................East at 3 to 4 feet.
      Primary period...............10 seconds.
      Secondary swell..............North at around 3 feet.
      Secondary period.............10 seconds.
      Tertiary swell...............Northeast at around 3 feet.
      Tertiary period..............12 seconds.
Winds...............Northeast at 10 to 15 mph.

.MONDAY...
Rip Current Risk.....Moderate *.
Surf Height
      North facing reefs............5 to 7 feet.
      East  facing reefs............5 to 7 feet.
      South facing reefs............2 to 3 feet.
      West  facing reefs............3 to 4 feet.
Swell/Period
      Primary swell................East at 3 to 4 feet.
      Primary period...............10 seconds.
      Secondary swell..............North at around 3 feet.
      Secondary period.............10 seconds.
      Tertiary swell...............Northeast at around 2 feet.
      Tertiary period..............11 seconds.
Max Heat Index.........Around 99.
Winds...............Northeast at 10 to 15 mph.


Tide information for the next 36 hours...

At Apra Harbor, Guam...
High tide  2.3 feet at 10:25 AM Sunday
Low  tide  1.5 feet at  3:31 PM Sunday
High tide  2.3 feet at  8:08 PM Sunday
Low  tide -1.1 feet at  3:47 AM Monday
High tide  2.2 feet at 11:21 AM Monday
Low  tide  1.5 feet at  4:30 PM Monday
High tide  2.2 feet at  8:58 PM Monday

At Rota Island...
High tide  2.2 feet at 10:22 AM Sunday
Low  tide  1.4 feet at  3:25 PM Sunday
High tide  2.2 feet at  8:05 PM Sunday
Low  tide -1.0 feet at  3:41 AM Monday
High tide  2.1 feet at 11:18 AM Monday
Low  tide  1.4 feet at  4:24 PM Monday
High tide  2.1 feet at  8:55 PM Monday

At Tinian Island...
High tide  1.7 feet at 10:23 AM Sunday
Low  tide  0.5 feet at  3:08 PM Sunday
High tide  1.7 feet at  8:06 PM Sunday
Low  tide -0.3 feet at  3:24 AM Monday
High tide  1.7 feet at 11:19 AM Monday
Low  tide  0.5 feet at  4:07 PM Monday
High tide  1.6 feet at  8:56 PM Monday

At Tanapag Harbor, Saipan...
High tide  2.5 feet at 10:48 AM Sunday
Low  tide  1.8 feet at  3:44 PM Sunday
High tide  2.3 feet at  8:01 PM Sunday
Low  tide -0.8 feet at  3:50 AM Monday
High tide  2.4 feet at 11:44 AM Monday
Low  tide  1.7 feet at  4:49 PM Monday
High tide  2.1 feet at  8:53 PM 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.

$$