259
FZPQ50 PGUM 070731
SRFGUM

Surf Zone Forecast for the Mariana Islands
National Weather Service Tiyan GU
531 PM ChST Tue Oct 7 2025

.DISCUSSION...The passing tropical disturbance (Invest 95W) is
moving further away. There is a moderate risk of rip currents
along north and east facing reefs while south and west facing
reefs remain low. There also remain a moderate risk of lightning
tonight. The surf is expected to continue to diminish through the
workweek. For the weekend a north swell may move in causing the
surf to rise.

$$

GUZ001-MPZ001>003-072300-
Guam-Rota-Tinian-Saipan-
531 PM ChST Tue Oct 7 2025

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

.TONIGHT...
Rip Current Risk.....Moderate *.
Surf Height
      North facing reefs............4 to 6 feet.
      East  facing reefs............5 to 7 feet.
      South facing reefs............2 to 4 feet.
      West  facing reefs............1 to 2 feet.
Swell/Period
      Primary swell................East at 4 to 5 feet.
      Primary period...............8 seconds.
Water Temperature
      Ritidian buoy..........86 Degrees.
Winds...............South at 15 to 25 mph.

.WEDNESDAY...
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 3 feet.
      West  facing reefs............1 to 2 feet.
Swell/Period
      Primary swell................Southeast at 4 to 5 feet.
      Primary period...............8 seconds.
Max Heat Index.........Around 101.
Winds...............South at 10 to 15 mph.

.WEDNESDAY NIGHT...
Rip Current Risk.....Moderate *.
Surf Height
      North facing reefs............2 to 4 feet.
      East  facing reefs............3 to 5 feet.
      South facing reefs............2 to 3 feet.
      West  facing reefs............1 to 2 feet.
Swell/Period
      Primary swell................Southeast at 3 to 4 feet.
      Primary period...............8 seconds.
Winds...............Light and variable becoming northeast
around 10 mph after midnight.


Tide information for the next 36 hours...

At Apra Harbor, Guam...
High tide  2.5 feet at  7:24 PM Tuesday
Low  tide  0.0 feet at  1:55 AM Wednesday
High tide  2.6 feet at  8:18 AM Wednesday
Low  tide  0.8 feet at  2:13 PM Wednesday
High tide  2.6 feet at  7:51 PM Wednesday
Low  tide -0.3 feet at  2:38 AM Thursday
High tide  2.5 feet at  9:16 AM Thursday

At Rota Island...
High tide  2.4 feet at  7:21 PM Tuesday
Low  tide  0.0 feet at  1:49 AM Wednesday
High tide  2.4 feet at  8:15 AM Wednesday
Low  tide  0.8 feet at  2:07 PM Wednesday
High tide  2.4 feet at  7:48 PM Wednesday
Low  tide -0.2 feet at  2:32 AM Thursday
High tide  2.4 feet at  9:13 AM Thursday

At Tinian Island...
High tide  1.7 feet at  6:42 PM Tuesday
Low  tide  0.0 feet at  1:28 AM Wednesday
High tide  1.5 feet at  7:54 AM Wednesday
Low  tide  0.7 feet at  1:30 PM Wednesday
High tide  1.7 feet at  7:07 PM Wednesday
Low  tide -0.2 feet at  2:16 AM Thursday
High tide  1.6 feet at  9:04 AM Thursday

At Tanapag Harbor, Saipan...
High tide  2.2 feet at  7:33 PM Tuesday
Low  tide  0.1 feet at  2:00 AM Wednesday
High tide  2.3 feet at  8:35 AM Wednesday
Low  tide  0.8 feet at  2:23 PM Wednesday
High tide  2.2 feet at  7:58 PM Wednesday
Low  tide -0.2 feet at  2:44 AM Thursday
High tide  2.3 feet at  9:37 AM 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.

$$