602
FZPQ50 PGUM 291800
SRFGUM

Surf Zone Forecast for the Mariana Islands
National Weather Service Tiyan GU
400 AM ChST Wed Jul 30 2025

.DISCUSSION...A moderate risk of rip currents is expected along all
reefs, as a dominant westerly swell and secondary easterly swell, as
well as localized wind waves, continue to produce elevated surf along
all reefs. Rip current risk is likely to drop to low along east and
south facing reefs by the weekend, once the westerly swell weakens
enough to minimize wrap-around effects across the Marianas.

$$

GUZ001-MPZ001>003-300900-
Guam-Rota-Tinian-Saipan-
400 AM ChST Wed Jul 30 2025

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

.TODAY...
Rip Current Risk.....Moderate.
Surf Height
      North facing reefs............5 to 8 feet.
      East  facing reefs............3 to 5 feet.
      South facing reefs............3 to 5 feet.
      West  facing reefs............6 to 8 feet.
Swell/Period
      Primary swell................West at 4 to 6 feet.
      Primary period...............10 seconds.
      Secondary swell..............East at around 2 feet.
      Secondary period.............9 seconds.
Water Temperature
      Ritidian buoy..........85 Degrees.
Max Heat Index.........Around 101.
Winds...............Southwest at 10 mph.

.TONIGHT...
Rip Current Risk.....Moderate.
Surf Height
      North facing reefs............5 to 8 feet.
      East  facing reefs............3 to 5 feet.
      South facing reefs............3 to 5 feet.
      West  facing reefs............6 to 8 feet.
Swell/Period
      Primary swell................West at 4 to 6 feet.
      Primary period...............10 seconds.
      Secondary swell..............East at around 2 feet.
      Secondary period.............9 seconds.
Winds...............Northwest at 10 mph.

.THURSDAY...
Rip Current Risk.....Moderate.
Surf Height
      North facing reefs............5 to 8 feet.
      East  facing reefs............3 to 5 feet.
      South facing reefs............3 to 5 feet.
      West  facing reefs............6 to 8 feet.
Swell/Period
      Primary swell................West at 4 to 6 feet.
      Primary period...............10 seconds.
      Secondary swell..............East at around 2 feet.
      Secondary period.............9 seconds.
Max Heat Index.........Around 102.
Winds...............Light and variable.

Tide information for the next 36 hours...

At Apra Harbor, Guam...
High tide  2.1 feet at 10:58 AM Wednesday
Low  tide  0.9 feet at  5:20 PM Wednesday
High tide  2.4 feet at 11:47 PM Wednesday
Low  tide  1.0 feet at  6:27 AM Thursday
High tide  2.0 feet at 12:07 PM Thursday
Low  tide  1.2 feet at  5:55 PM Thursday

At Rota Island...
High tide  2.0 feet at 10:55 AM Wednesday
Low  tide  0.8 feet at  5:14 PM Wednesday
High tide  2.3 feet at 11:44 PM Wednesday
Low  tide  1.0 feet at  6:21 AM Thursday
High tide  1.8 feet at 12:04 PM Thursday
Low  tide  1.1 feet at  5:49 PM Thursday

At Tinian Island...
High tide  1.3 feet at 10:31 AM Wednesday
Low  tide  0.5 feet at  4:44 PM Wednesday
High tide  1.6 feet at 11:22 PM Wednesday
Low  tide  0.6 feet at  6:22 AM Thursday
High tide  1.2 feet at 12:00 PM Thursday
Low  tide  0.8 feet at  5:12 PM Thursday

At Tanapag Harbor, Saipan...
High tide  1.6 feet at 11:19 AM Wednesday
Low  tide  0.6 feet at  5:24 PM Wednesday
High tide  2.1 feet at 12:15 AM Thursday
Low  tide  0.8 feet at  6:53 AM Thursday
High tide  1.5 feet at 12:28 PM Thursday
Low  tide  0.9 feet at  5:53 PM Thursday

* 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.

$$