032
FZPQ50 PGUM 110655
SRFGUM

Surf Zone Forecast for the Mariana Islands
National Weather Service Tiyan GU
455 PM ChST Fri Jul 11 2025

.DISCUSSION...
There is a moderate risk of rip currents along east facing reefs,
with a low risk along all other reefs. As the monsoon pattern in
western Micronesia develops, the southwest swell is expected
to build next week. This will cause surf to build along south and
west facing reefs, and may cause the risk of rip currents to become
moderate along these reefs. A moderate risk of lightning is expected
to continue through the weekend as the Marianas remains in an unsettled
southeast flow.

$$

GUZ001-MPZ001>003-112200-
Guam-Rota-Tinian-Saipan-
455 PM ChST Fri Jul 11 2025

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

.TONIGHT...
Rip Current Risk.....Moderate *.
Surf Height
      North facing reefs............2 to 3 feet.
      East  facing reefs............4 to 6 feet.
      South facing reefs............2 to 4 feet.
      West  facing reefs............2 to 3 feet.
Swell/Period
      Primary swell................East at 2 to 4 feet.
      Primary period...............8 seconds.
      Secondary swell..............Southwest at 1 to 2 feet.
      Secondary period.............8 seconds.
Water Temperature
      Ritidian buoy..........86 Degrees.
Winds...............Southeast at 10 to 15 mph.

.SATURDAY...
Rip Current Risk.....Moderate *.
Surf Height
      North facing reefs............2 to 3 feet.
      East  facing reefs............5 to 7 feet.
      South facing reefs............2 to 4 feet.
      West  facing reefs............2 to 3 feet.
Swell/Period
      Primary swell................East at 3 to 5 feet.
      Primary period...............8 seconds.
      Secondary swell..............Southwest at 1 to 2 feet.
      Secondary period.............8 seconds.
Max Heat Index.........Around 100.
Winds...............Southeast at 10 to 15 mph.

.SATURDAY NIGHT...
Rip Current Risk.....Moderate *.
Surf Height
      North facing reefs............1 to 3 feet.
      East  facing reefs............4 to 6 feet.
      South facing reefs............2 to 4 feet.
      West  facing reefs............2 to 3 feet.
Swell/Period
      Primary swell................Southeast at 3 to 4 feet.
      Primary period...............8 seconds.
      Secondary swell..............Southwest at 1 to 2 feet.
      Secondary period.............8 seconds.
Winds...............Southeast at 10 to 15 mph.


Tide information for the next 36 hours...

At Apra Harbor, Guam...
High tide  2.5 feet at  9:35 PM Friday
Low  tide  1.9 feet at  2:43 AM Saturday
High tide  2.5 feet at  7:22 AM Saturday
Low  tide -0.2 feet at  2:49 PM Saturday
High tide  2.6 feet at 10:08 PM Saturday
Low  tide  1.8 feet at  3:24 AM Sunday
High tide  2.5 feet at  8:05 AM Sunday

At Rota Island...
High tide  2.4 feet at  9:32 PM Friday
Low  tide  1.8 feet at  2:37 AM Saturday
High tide  2.4 feet at  7:19 AM Saturday
Low  tide -0.2 feet at  2:43 PM Saturday
High tide  2.4 feet at 10:05 PM Saturday
Low  tide  1.7 feet at  3:18 AM Sunday
High tide  2.4 feet at  8:02 AM Sunday

At Tinian Island...
High tide  1.7 feet at  9:50 PM Friday
Low  tide  1.5 feet at  1:44 AM Saturday
High tide  1.8 feet at  6:14 AM Saturday
Low  tide -0.3 feet at  2:27 PM Saturday
High tide  1.7 feet at 10:20 PM Saturday
Low  tide  1.5 feet at  2:37 AM Sunday
High tide  1.8 feet at  7:00 AM Sunday

At Tanapag Harbor, Saipan...
High tide  2.2 feet at 10:11 PM Friday
Low  tide  1.8 feet at  2:56 AM Saturday
High tide  2.1 feet at  7:03 AM Saturday
Low  tide -0.5 feet at  2:59 PM Saturday
High tide  2.2 feet at 10:45 PM Saturday
Low  tide  1.7 feet at  3:41 AM Sunday
High tide  2.1 feet at  7:54 AM Sunday

* 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.

$$