476
FZPQ50 PGUM 191905
SRFGUM

Surf Zone Forecast for the Mariana Islands
National Weather Service Tiyan GU
505 AM ChST Sun Sep 20 2026

.DISCUSSION...
A moderate risk for rip currents will persist through Monday.
A moderate risk for lightning will continue through the first
half of this week, possibly longer.

$$

GUZ001-MPZ001>003-201015-
Guam-Rota-Tinian-Saipan-
505 AM ChST Sun Sep 20 2026

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

.TODAY...
Rip Current Risk.....Moderate *.
Surf Height
      North facing reefs............4 to 6 feet.
      East  facing reefs............4 to 6 feet.
      South facing reefs............3 to 5 feet.
      West  facing reefs............4 to 6 feet.
Swell/Period
      Primary swell................Southwest at 3 to 4 feet.
      Primary period...............9 seconds.
      Secondary swell..............North at 2 to 3 feet.
      Secondary period.............10 seconds.
Max Heat Index.........Around 104.
Water Temperature
      Pago Bay buoy..........85 Degrees.
Max Heat Index.........Around 101.
Winds...............Light and variable.

.TONIGHT...
Rip Current Risk.....Moderate *.
Surf Height
      North facing reefs............4 to 6 feet.
      East  facing reefs............3 to 5 feet.
      South facing reefs............3 to 5 feet.
      West  facing reefs............4 to 6 feet.
Swell/Period
      Primary swell................Southwest at 3 to 4 feet.
      Primary period...............9 seconds.
      Secondary swell..............North at 2 to 3 feet.
      Secondary period.............10 seconds.
Winds...............Light and variable.

.MONDAY...
Rip Current Risk.....Moderate *.
Surf Height
      North facing reefs............4 to 6 feet.
      East  facing reefs............3 to 5 feet.
      South facing reefs............3 to 5 feet.
      West  facing reefs............4 to 6 feet.
Swell/Period
      Primary swell................Northwest at 3 to 4 feet.
      Primary period...............10 seconds.
      Secondary swell..............Northeast at 2 to 3 feet.
      Secondary period.............11 seconds.
Max Heat Index.........Around 101.
Winds...............Southeast at 10 mph.


Tide information for the next 36 hours...

At Apra Harbor, Guam...
Low  tide  0.3 feet at  8:28 AM Sunday
High tide  2.0 feet at  4:48 PM Sunday
Low  tide  1.6 feet at 10:00 PM Sunday
High tide  1.8 feet at  1:43 AM Monday
Low  tide  0.3 feet at  9:34 AM Monday
High tide  2.1 feet at  5:29 PM Monday
Low  tide  1.5 feet at 10:50 PM Monday

At Rota Island...
Low  tide  0.3 feet at  8:22 AM Sunday
High tide  1.9 feet at  4:45 PM Sunday
Low  tide  1.5 feet at  9:54 PM Sunday
High tide  1.7 feet at  1:40 AM Monday
Low  tide  0.3 feet at  9:28 AM Monday
High tide  1.9 feet at  5:26 PM Monday
Low  tide  1.4 feet at 10:44 PM Monday

At Tinian Island...
Low  tide  0.1 feet at  8:05 AM Sunday
High tide  1.5 feet at  4:46 PM Sunday
Low  tide  0.5 feet at  9:37 PM Sunday
High tide  1.3 feet at  1:41 AM Monday
Low  tide  0.1 feet at  9:11 AM Monday
High tide  1.5 feet at  5:27 PM Monday
Low  tide  0.5 feet at 10:27 PM Monday

At Tanapag Harbor, Saipan...
Low  tide  0.3 feet at  8:45 AM Sunday
High tide  1.8 feet at  5:20 PM Sunday
Low  tide  1.6 feet at  9:59 PM Sunday
High tide  1.7 feet at  1:11 AM Monday
Low  tide  0.3 feet at  9:47 AM Monday
High tide  1.9 feet at  5:50 PM Monday
Low  tide  1.5 feet at 10:41 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.

$$