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FZPQ50 PGUM 070721
SRFGUM

Surf Zone Forecast for the Mariana Islands
National Weather Service Tiyan GU
521 PM 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 persist
through late tonight as the pulse in northerly swell continues to
diminish. Meanwhile, the high rip current risk is expected to persist
along east facing reefs for much of next week.

$$

GUZ001-MPZ001>003-072000-
Guam-Rota-Tinian-Saipan-
521 PM ChST Sun Dec 7 2025

...HIGH SURF ADVISORY NOW IN EFFECT UNTIL 4 AM CHST MONDAY ALONG NORTH
FACING REEFS...
...HIGH RISK OF RIP CURRENTS NOW UNTIL 4 AM CHST MONDAY ALONG NORTH
FACING REEFS...

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

.TONIGHT...
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 4 feet.
      Secondary period.............9 seconds.
      Tertiary swell...............Northeast at around 3 feet.
      Tertiary period..............12 seconds.
Water Temperature
      Ritidian buoy..........85 Degrees.
Winds...............Northeast at 10 to 15 mph.

.MONDAY...
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.
Max Heat Index.........Around 99.
Winds...............East at 10 to 15 mph.

.MONDAY NIGHT...
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.

Tide information for the next 36 hours...

At Apra Harbor, Guam...
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
Low  tide -0.8 feet at  4:38 AM Tuesday
High tide  2.2 feet at 12:16 PM Tuesday

At Rota Island...
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
Low  tide -0.8 feet at  4:32 AM Tuesday
High tide  2.0 feet at 12:13 PM Tuesday

At Tinian Island...
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
Low  tide -0.3 feet at  4:15 AM Tuesday
High tide  1.6 feet at 12:14 PM Tuesday

At Tanapag Harbor, Saipan...
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  tide -0.5 feet at  4:42 AM Tuesday
High tide  2.4 feet at 12:34 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.

$$