754
FZPQ50 PGUM 200600
SRFGUM

Surf Zone Forecast for the Mariana Islands
National Weather Service Tiyan GU
400 PM 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>003-202100-
Guam-Rota-Tinian-Saipan-
400 PM ChST Sun Sep 20 2026

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

.TONIGHT...
Rip Current Risk.....Moderate *.
Surf Height
      North facing reefs............3 to 5 feet.
      East  facing reefs............3 to 5 feet.
      South facing reefs............4 to 6 feet.
      West  facing reefs............4 to 6 feet.
Swell/Period
      Primary swell................Southwest at 3 to 4 feet.
      Primary period...............8 seconds.
      Secondary swell..............Northwest at 3 feet.
      Secondary period.............10 seconds.
      Tertiary swell...............Northeast at 2 to 3 feet.
      Tertiary period..............10 seconds.
Water Temperature
      Pago buoy..........86 Degrees.
Winds...............Light and variable.

.MONDAY...
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............3 to 5 feet.
Swell/Period
      Primary swell................North at 2 to 4 feet.
      Primary period...............9 seconds.
      Secondary swell..............Northeast at 2 to 4 feet.
      Secondary period.............11 seconds.
      Tertiary swell...............South at 2 to 3 feet.
      Tertiary period..............10 seconds.
Max Heat Index.........Around 102.
Winds...............Southeast at 10 to 15 mph.

.MONDAY NIGHT...
Rip Current Risk.....Moderate *.
Surf Height
      North facing reefs............3 to 5 feet.
      East  facing reefs............3 to 5 feet.
      South facing reefs............3 to 5 feet.
      West  facing reefs............3 to 5 feet.
Swell/Period
      Primary swell................North at 2 to 4 feet.
      Primary period...............9 seconds.
      Secondary swell..............Northeast at 2 to 3 feet.
      Secondary period.............11 seconds.
      Tertiary swell...............Southwest at 2 to 3 feet.
      Tertiary period..............10 seconds.
Winds...............South at around 10 mph.


Tide information for the next 36 hours...

At Apra Harbor, Guam...
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...
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...
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...
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.

$$