655
FZPQ50 PGUM 060418
SRFGUM

Surf Zone Forecast for the Mariana Islands
National Weather Service Tiyan GU
218 PM ChST Sat Dec 6 2025

.DISCUSSION...Hazardous surf and a high risk of rip currents is
expected along north facing reefs of the Marianas through Sunday,
while remaining moderate along east and west facing reefs for the
time being due to significant northerly swells mixing in with the
already elevated albeit seasonal trade swell. Surf is then likely to
fall below hazardous levels thereafter as this pulse in northerly
swell diminishes, which will also allow rip current risk to drop to
moderate along said reefs. Meanwhile, rip current risk is expected to
drop to low along west facing reefs as early Sunday night, while
persisting along east facing reefs for much of next week.

$$

GUZ001-MPZ001>003-062000-
Guam-Rota-Tinian-Saipan-
218 PM ChST Sat Dec 6 2025

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

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

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

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

.SUNDAY NIGHT...
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.

Tide information for the next 36 hours...

At Apra Harbor, Guam...
High tide  2.4 feet at  7:22 PM Saturday
Low  tide -1.2 feet at  2:56 AM Sunday
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

At Rota Island...
High tide  2.3 feet at  7:19 PM Saturday
Low  tide -1.1 feet at  2:50 AM Sunday
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

At Tinian Island...
High tide  1.8 feet at  7:20 PM Saturday
Low  tide -0.4 feet at  2:33 AM Sunday
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

At Tanapag Harbor, Saipan...
High tide  2.4 feet at  7:12 PM Saturday
Low  tide -0.9 feet at  3:00 AM Sunday
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

* 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.

$$