943
FZPQ50 PGUM 281800
SRFGUM

Surf Zone Forecast for the Mariana Islands
National Weather Service Tiyan GU
400 AM ChST Fri Aug 29 2025

.DISCUSSION...There will be a moderate risk of rip currents along
east facing reefs for at least the next few days. There will also
be a moderate risk of lightning beginning this afternoon and
continuing through into next week.

$$

GUZ001-MPZ001>003-290900-
Guam-Rota-Tinian-Saipan-
400 AM ChST Fri Aug 29 2025

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

.TODAY...
Rip Current Risk.....Moderate *.
Surf Height
      North facing reefs............2 to 3 feet.
      East  facing reefs............3 to 5 feet.
      South facing reefs............1 to 3 feet.
      West  facing reefs............Around 1 foot.
Swell/Period
      Primary swell................East at 2 to 4 feet.
      Primary period...............8 seconds.
Water Temperature
      Ritidian buoy..........86 Degrees.
Max Heat Index.........Around 102.
Winds...............East at 10 to 15 mph.

.TONIGHT...
Rip Current Risk.....Moderate *.
Surf Height
      North facing reefs............2 to 3 feet.
      East  facing reefs............4 to 6 feet.
      South facing reefs............1 to 3 feet.
      West  facing reefs............Around 1 foot.
Swell/Period
      Primary swell................East at 2 to 4 feet.
      Primary period...............8 seconds.
Winds...............East at 10 to 15 mph.

.SATURDAY...
Rip Current Risk.....Moderate *.
Surf Height
      North facing reefs............2 to 4 feet.
      East  facing reefs............4 to 6 feet.
      South facing reefs............1 to 3 feet.
      West  facing reefs............Around 1 foot.
Swell/Period
      Primary swell................East at 3 to 4 feet.
      Primary period...............8 seconds.
Max Heat Index.........Around 102.
Winds...............East at 10 to 15 mph.


Tide information for the next 36 hours...

At Apra Harbor, Guam...
Low  tide  0.6 feet at  5:23 AM Friday
High tide  2.0 feet at 11:49 AM Friday
Low  tide  1.4 feet at  5:18 PM Friday
High tide  2.2 feet at 10:51 PM Friday
Low  tide  0.5 feet at  6:07 AM Saturday
High tide  1.9 feet at  1:09 PM Saturday

At Rota Island...
Low  tide  0.6 feet at  5:17 AM Friday
High tide  1.9 feet at 11:46 AM Friday
Low  tide  1.3 feet at  5:12 PM Friday
High tide  2.0 feet at 10:48 PM Friday
Low  tide  0.5 feet at  6:01 AM Saturday
High tide  1.8 feet at  1:06 PM Saturday

At Tinian Island...
Low  tide  0.3 feet at  5:18 AM Friday
High tide  1.2 feet at 12:07 PM Friday
Low  tide  1.0 feet at  4:34 PM Friday
High tide  1.5 feet at 10:12 PM Friday
Low  tide  0.2 feet at  6:06 AM Saturday
High tide  1.2 feet at  1:43 PM Saturday

At Tanapag Harbor, Saipan...
Low  tide  0.5 feet at  5:41 AM Friday
High tide  1.6 feet at 12:15 PM Friday
Low  tide  1.2 feet at  5:08 PM Friday
High tide  1.9 feet at 11:10 PM Friday
Low  tide  0.5 feet at  6:28 AM Saturday
High tide  1.6 feet at  1:25 PM Saturday

* 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.

$$