103
FZPQ50 PGUM 301828
SRFGUM

Surf Zone Forecast for the Mariana Islands
National Weather Service Tiyan GU
428 AM ChST Tue Jul 1 2025

.DISCUSSION...There is a moderate risk of rip currents along
east facing reefs. A moderate risk for rip currents is expected to
develop along west facing reefs tonight as a southwest swell
develops. There is also a moderate risk of lightning for the next few
days. Surf may build by a foot or two by the weekend as the
southwesterly swell potentially becomes the primary swell.

$$

GUZ001-MPZ001>003-010930-
Guam-Rota-Tinian-Saipan-
428 AM ChST Tue Jul 1 2025

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

.TODAY...
Rip Current Risk.....Moderate *.
Surf Height
      North facing reefs............1 to 3 feet.
      East  facing reefs............3 to 5 feet.
      South facing reefs............2 to 4 feet.
      West  facing reefs............2 to 4 feet.
Swell/Period
      Primary swell................Southeast at 3 to 4 feet.
      Primary period...............8 seconds.
      Secondary swell..............Southwest at 2 to 3 feet.
      Secondary period.............8 seconds.
Water Temperature
      Ritidian buoy..........86 Degrees.
Max Heat Index.........Around 97.
Winds...............South at 10 to 15 mph.

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

.WEDNESDAY...
Rip Current Risk.....Moderate *.
Surf Height
      North facing reefs............1 to 3 feet.
      East  facing reefs............3 to 5 feet.
      South facing reefs............2 to 4 feet.
      West  facing reefs............3 to 5 feet.
Swell/Period
      Primary swell................Southeast at 3 to 4 feet.
      Primary period...............8 seconds.
      Secondary swell..............Southwest at around 3 to 4 feet.
      Secondary period.............8 seconds.
Max Heat Index.........Around 98.
Winds...............South at around 10 mph.


Tide information for the next 36 hours...

At Apra Harbor, Guam...
Low  tide  1.5 feet at  6:36 AM Tuesday
High tide  2.1 feet at 11:13 AM Tuesday
Low  tide  0.6 feet at  6:04 PM Tuesday
High tide  2.5 feet at  1:09 AM Wednesday
Low  tide  1.3 feet at  7:32 AM Wednesday
High tide  1.9 feet at 12:28 PM Wednesday

At Rota Island...
Low  tide  1.4 feet at  6:30 AM Tuesday
High tide  2.0 feet at 11:10 AM Tuesday
Low  tide  0.6 feet at  5:58 PM Tuesday
High tide  2.4 feet at  1:06 AM Wednesday
Low  tide  1.2 feet at  7:26 AM Wednesday
High tide  1.8 feet at 12:25 PM Wednesday

At Tinian Island...
High tide  1.3 feet at 10:28 AM Tuesday
Low  tide  0.3 feet at  5:33 PM Tuesday
High tide  1.7 feet at 12:48 AM Wednesday
Low  tide  0.8 feet at  7:25 AM Wednesday
High tide  1.2 feet at 11:59 AM Wednesday
Low  tide  0.5 feet at  6:08 PM Wednesday

At Tanapag Harbor, Saipan...
Low  tide  1.2 feet at  7:13 AM Tuesday
High tide  1.6 feet at 11:33 AM Tuesday
Low  tide  0.3 feet at  6:12 PM Tuesday
High tide  2.2 feet at  1:25 AM Wednesday
Low  tide  1.0 feet at  8:04 AM Wednesday
High tide  1.4 feet at 12:48 PM Wednesday

* 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.

$$