379
FZPQ50 PGUM 171803
SRFGUM

Surf Zone Forecast for the Mariana Islands
National Weather Service Tiyan GU
403 AM ChST Sun May 18 2025

.DISCUSSION...There is a moderate risk of rip currents along east
facing reefs, and a low risk of rip currents along all other reefs.
Little change is expected through the week.

$$

GUZ001-MPZ001>003-180915-
Guam-Rota-Tinian-Saipan-
403 AM ChST Sun May 18 2025

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

.TODAY...
Rip Current Risk.....Moderate *.
Surf Height
      North facing reefs............2 to 4 feet.
      East  facing reefs............5 to 7 feet.
      South facing reefs............1 to 3 feet.
      West  facing reefs............Around 1 foot.
Swell/Period
      Primary swell................East at 3 to 5 feet.
      Primary period...............8 seconds.
Water Temperature
      Ritidian buoy..........84 Degrees.
Max Heat Index.........Around 99.
Winds...............East at 10 to 20 mph.

.TONIGHT...
Rip Current Risk.....Moderate *.
Surf Height
      North facing reefs............2 to 4 feet.
      East  facing reefs............5 to 7 feet.
      South facing reefs............1 to 3 feet.
      West  facing reefs............Around 1 foot.
Swell/Period
      Primary swell................East at 3 to 5 feet.
      Primary period...............8 seconds.
Winds...............East at 10 to 20 mph.

.MONDAY...
Rip Current Risk.....Moderate *.
Surf Height
      North facing reefs............2 to 4 feet.
      East  facing reefs............5 to 7 feet.
      South facing reefs............1 to 3 feet.
      West  facing reefs............Around 1 foot.
Swell/Period
      Primary swell................East at 3 to 5 feet.
      Primary period...............8 seconds.
Max Heat Index.........Around 98.
Winds...............East at 15 to 20 mph.


Tide information for the next 36 hours...

At Apra Harbor, Guam...
Low  tide  1.9 feet at  5:42 AM Sunday
High tide  2.2 feet at  9:48 AM Sunday
Low  tide  0.0 feet at  5:30 PM Sunday
High tide  2.4 feet at  1:24 AM Monday
Low  tide  1.9 feet at  6:48 AM Monday
High tide  2.1 feet at 10:42 AM Monday

At Rota Island...
Low  tide  1.8 feet at  5:36 AM Sunday
High tide  2.1 feet at  9:45 AM Sunday
Low  tide  0.0 feet at  5:24 PM Sunday
High tide  2.2 feet at  1:21 AM Monday
Low  tide  1.7 feet at  6:42 AM Monday
High tide  2.0 feet at 10:39 AM Monday

At Tinian Island...
Low  tide  1.5 feet at  5:18 AM Sunday
High tide  1.6 feet at  8:36 AM Sunday
Low  tide -0.1 feet at  5:18 PM Sunday
High tide  1.7 feet at  1:42 AM Monday
Low  tide  1.5 feet at  6:24 AM Monday
High tide  1.6 feet at  9:36 AM Monday

At Tanapag Harbor, Saipan...
Low  tide  1.8 feet at  6:37 AM Sunday
High tide  1.8 feet at  9:04 AM Sunday
Low  tide -0.2 feet at  5:39 PM Sunday
High tide  2.2 feet at  1:47 AM Monday
Low  tide  1.7 feet at  7:43 AM Monday
High tide  1.7 feet at 10:10 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. If caught in a
rip current, swim parallel to the beach rather than against the
current.

$$