737
FZPQ50 PGUM 310600
SRFGUM

Surf Zone Forecast for the Mariana Islands
National Weather Service Tiyan GU
400 PM ChST Sun Aug 31 2025

.DISCUSSION...A moderate risk of rip currents along east facing
reefs will persist through Monday. This risk is expected to drop
to low Monday night as the trade winds and swells continue to
weaken. Model guidance suggests surf will be below 5 feet
through the rest of the week. There may be a moderate risk of
lightning for the middle of the week.

$$

GUZ001-MPZ001>003-311945-
Guam-Rota-Tinian-Saipan-
400 PM ChST Sun Aug 31 2025

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

.TONIGHT...
Rip Current Risk.....Moderate *.
Surf Height
      North facing reefs............2 to 4 feet.
      East  facing reefs............4 to 6 feet.
      South facing reefs............2 to 3 feet.
      West  facing reefs............1 to 2 feet.
Swell/Period
      Primary swell................Southeast at around 3 feet.
      Primary period...............8 seconds.
Water Temperature
      Ritidian buoy..........86 Degrees.
Winds...............Southeast at around 10 mph.

.MONDAY...
Rip Current Risk.....Moderate *.
Surf Height
      North facing reefs............2 to 4 feet.
      East  facing reefs............3 to 5 feet.
      South facing reefs............2 to 3 feet.
      West  facing reefs............1 to 2 feet.
Swell/Period
      Primary swell................South at 2 to 3 feet.
      Primary period...............8 seconds.
Max Heat Index.........Around 99.
Winds...............East at around 10 mph.

.MONDAY NIGHT...
Rip Current Risk.....Low *.
Surf Height
      North facing reefs............1 to 3 feet.
      East  facing reefs............2 to 4 feet.
      South facing reefs............1 to 3 feet.
      West  facing reefs............1 to 3 feet.
Swell/Period
      Primary swell................South at 1 to 2 feet.
      Primary period...............8 seconds.
Winds...............Northeast at 10 to 20 mph.


Tide information for the next 36 hours...

At Apra Harbor, Guam...
Low  tide  1.7 feet at  7:09 PM Sunday
High tide  2.0 feet at 12:01 AM Monday
Low  tide  0.4 feet at  8:01 AM Monday
High tide  2.0 feet at  4:24 PM Monday
Low  tide  1.8 feet at  8:43 PM Monday
High tide  2.0 feet at 12:59 AM Tuesday

At Rota Island...
Low  tide  1.6 feet at  7:03 PM Sunday
High tide  1.9 feet at 11:58 PM Sunday
Low  tide  0.3 feet at  7:55 AM Monday
High tide  1.9 feet at  4:21 PM Monday
Low  tide  1.7 feet at  8:37 PM Monday
High tide  1.9 feet at 12:56 AM Tuesday

At Tinian Island...
Low  tide  1.3 feet at  6:07 PM Sunday
High tide  1.5 feet at 11:14 PM Sunday
Low  tide  0.1 feet at  8:00 AM Monday
High tide  1.4 feet at  4:46 PM Monday
Low  tide  1.3 feet at  7:34 PM Monday
High tide  1.5 feet at 12:05 AM Tuesday

At Tanapag Harbor, Saipan...
Low  tide  1.5 feet at  6:30 PM Sunday
High tide  1.9 feet at 12:03 AM Monday
Low  tide  0.3 feet at  8:21 AM Monday
High tide  1.7 feet at  5:09 PM Monday
Low  tide  1.6 feet at  7:50 PM Monday
High tide  1.9 feet at 12:43 AM 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.

$$