FZPQ50 PGUM 130717
SRFGUM

Surf Zone Forecast for the Mariana Islands
National Weather Service Tiyan GU
517 PM ChST Wed May 13 2026

.DISCUSSION...There is a moderate risk of rip currents along north
and east facing reefs. Some lightning may linger from the afternoon
island-convection showers, but will eventually taper down once
daytime heating is minimized after sunset. A high risk of rip
currents may return along east-facing reefs as the trade winds and
swell increase over the weekend.

$$

GUZ001-MPZ001>003-132230-
Guam-Rota-Tinian-Saipan-
517 PM ChST Wed May 13 2026

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

.TONIGHT...
Rip Current Risk.....Moderate *.
Surf Height
      North facing reefs............3 to 5 feet.
      East  facing reefs............4 to 6 feet.
      South facing reefs............2 to 4 feet.
      West  facing reefs............Around 1 foot.
Swell/Period
      Primary swell................East at 3 to 4 feet.
      Primary period...............9 seconds.
Water Temperature
      Tanapag buoy.......... 84 Degrees.
Winds...............Southeast at around 10 mph.

.THURSDAY...
Rip Current Risk.....Moderate *.
Surf Height
      North facing reefs............3 to 5 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 100.
Winds...............Southeast at around 10 mph.

.THURSDAY NIGHT...
Rip Current Risk.....Moderate *.
Surf Height
      North facing reefs............3 to 5 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.
Winds...............East at 10 to 15 mph.


Tide information for the next 36 hours...

At Apra Harbor, Guam...
Low  tide  1.0 feet at 10:44 PM Wednesday
High tide  2.6 feet at  4:56 AM Thursday
Low  tide  0.4 feet at 11:41 AM Thursday
High tide  2.3 feet at  6:13 PM Thursday
Low  tide  1.2 feet at 11:39 PM Thursday
High tide  2.6 feet at  5:28 AM Friday

At Rota Island...
Low  tide  0.9 feet at 10:38 PM Wednesday
High tide  2.4 feet at  4:53 AM Thursday
Low  tide  0.4 feet at 11:35 AM Thursday
High tide  2.2 feet at  6:10 PM Thursday
Low  tide  1.1 feet at 11:33 PM Thursday
High tide  2.5 feet at  5:25 AM Friday

At Tinian Island...
Low  tide  0.3 feet at 10:21 PM Wednesday
High tide  1.9 feet at  4:54 AM Thursday
Low  tide  0.1 feet at 11:18 AM Thursday
High tide  1.7 feet at  6:11 PM Thursday
Low  tide  0.4 feet at 11:16 PM Thursday
High tide  1.9 feet at  5:26 AM Friday

At Tanapag Harbor, Saipan...
Low  tide  0.8 feet at 10:40 PM Wednesday
High tide  2.2 feet at  4:57 AM Thursday
Low  tide  0.2 feet at 11:42 AM Thursday
High tide  1.9 feet at  6:29 PM Thursday
Low  tide  1.0 feet at 11:29 PM Thursday
High tide  2.3 feet at  5:22 AM Friday

* 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.

$$