933
FZPQ50 PGUM 071750
SRFGUM

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

.DISCUSSION...Hazardous surf of 9 feet and a high risk of rip currents
along north facing reefs of the Marianas are now expected to persist
through this afternoon as buoy data indicates that the pulses of
north to northeast swell are not diminishing as quickly as previously
expected. Meanwhile, the high rip current risk is expected to persist
along east facing reefs for much of next week.

$$

GUZ001-MPZ001>003-080900-
Guam-Rota-Tinian-Saipan-
350 AM ChST Mon Dec 8 2025

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

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

.TODAY...
Rip Current Risk.....High *.
Surf Height
      North facing reefs............7 to 9 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 3 to 5 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.
Water Temperature
      Ritidian buoy..........85 Degrees.
Max Heat Index.........Around 99.
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 8 feet.
      South facing reefs............1 to 2 feet.
      West  facing reefs............2 to 4 feet.
Swell/Period
      Primary swell................East at 3 to 5 feet.
      Primary period...............9 seconds.
      Secondary swell..............North at around 3 feet.
      Secondary period.............9 seconds.
Winds...............East at 10 to 15 mph.

.TUESDAY...
Rip Current Risk.....Moderate *.
Surf Height
      North facing reefs............6 to 8 feet.
      East  facing reefs............5 to 8 feet.
      South facing reefs............1 to 2 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 3 feet.
      Secondary period.............9 seconds.
Max Heat Index.........Around 98.
Winds...............East at 10 to 15 mph.


Tide information for the next 36 hours...

At Apra Harbor, Guam...
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
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

At Rota Island...
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
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

At Tinian Island...
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
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

At Tanapag Harbor, Saipan...
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  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

* 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.

$$