199
FZPQ50 PGUM 020608
SRFGUM

Surf Zone Forecast for the Mariana Islands
National Weather Service Tiyan GU
408 PM ChST Sat Aug 2 2025

.DISCUSSION...A moderate risk of rip currents will continue along
west and north facing reefs as the elevated west-northwest swell
persists. A strengthening secondary trade swell will likely bring a
moderate rip current risk along east facing reefs beginning tonight.
A moderate risk of lightning is expected to continue through the
weekend for Guam.

$$

GUZ001-MPZ001>003-022115-
Guam-Rota-Tinian-Saipan-
408 PM ChST Sat Aug 2 2025

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

.TONIGHT...
Rip Current Risk.....Moderate *.
Surf Height
      North facing reefs............4 to 6 feet.
      East  facing reefs............3 to 5 feet.
      South facing reefs............2 to 4 feet.
      West  facing reefs............4 to 6 feet.
Swell/Period
      Primary swell................West at 3 to 4 feet.
      Primary period...............10 seconds.
      Secondary swell..............East at around 3 feet.
      Secondary period.............8 seconds.
Water Temperature
      Ritidian buoy................86 Degrees.
Winds.........................East to southeast 5 to 15 mph.

.SUNDAY...
Rip Current Risk.....Moderate *.
Surf Height
      North facing reefs............4 to 6 feet.
      East  facing reefs............3 to 5 feet.
      South facing reefs............2 to 4 feet.
      West  facing reefs............4 to 6 feet.
Swell/Period
      Primary swell................West at 3 to 4 feet.
      Primary period...............10 seconds.
      Secondary swell..............East at around 3 feet.
      Secondary period.............8 seconds.
Max Heat Index.....................Around 101.
Winds.........................East to southeast at 10 to 15 mph.

.SUNDAY NIGHT...
Rip Current Risk.....Moderate *.
Surf Height
      North facing reefs............4 to 6 feet.
      East  facing reefs............3 to 5 feet.
      South facing reefs............2 to 4 feet.
      West  facing reefs............4 to 6 feet.
Swell/Period
      Primary swell................West at 3 to 4 feet.
      Primary period...............10 seconds.
      Secondary swell..............East at around 3 feet.
      Secondary period.............8 seconds.
Winds.........................East to southeast at 10 to 15 mph.


Tide information for the next 36 hours...

At Apra Harbor, Guam...
Low  tide  1.6 feet at  7:32 PM Saturday
High tide  2.2 feet at  1:13 AM Sunday
Low  tide  0.5 feet at  9:01 AM Sunday
High tide  2.0 feet at  4:56 PM Sunday
Low  tide  1.8 feet at  8:49 PM Sunday
High tide  2.2 feet at  1:57 AM Monday

At Rota Island...
Low  tide  1.5 feet at  7:26 PM Saturday
High tide  2.1 feet at  1:10 AM Sunday
Low  tide  0.5 feet at  8:55 AM Sunday
High tide  1.9 feet at  4:53 PM Sunday
Low  tide  1.7 feet at  8:43 PM Sunday
High tide  2.1 feet at  1:54 AM Monday

At Tinian Island...
Low  tide  1.2 feet at  6:23 PM Saturday
High tide  1.6 feet at 12:29 AM Sunday
Low  tide  0.1 feet at  8:57 AM Sunday
High tide  1.3 feet at  5:27 PM Sunday
Low  tide  1.3 feet at  7:33 PM Sunday
High tide  1.6 feet at  1:04 AM Monday

At Tanapag Harbor, Saipan...
Low  tide  1.4 feet at  6:53 PM Saturday
High tide  2.0 feet at  1:11 AM Sunday
Low  tide  0.3 feet at  9:22 AM Sunday
High tide  2.0 feet at  1:37 AM Monday
Low  tide  0.2 feet at 10:12 AM Monday
High tide  1.7 feet at  6:47 PM 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. Rip currents
will be life threatening. If caught in a rip current, swim parallel
to the beach rather than against the current.

$$