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FZPQ50 PGUM 171800
SRFGUM

Surf Zone Forecast for the Mariana Islands
National Weather Service Tiyan GU
400 AM ChST Sun Jan 18 2026

.DISCUSSION...There will be a moderate risk of rip currents along
north and east facing reefs for the next few days.

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GUZ001-MPZ001>003-180900-
Guam-Rota-Tinian-Saipan-
400 AM ChST Sun Jan 18 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............3 to 5 feet.
      East  facing reefs............5 to 7 feet.
      South facing reefs............2 to 4 feet.
      West  facing reefs............2 to 4 feet.
Swell/Period
      Primary swell................East at 3 to 5 feet.
      Primary period...............8 seconds.
      Secondary swell..............North at around 2 feet.
      Secondary period.............10 seconds.
Water Temperature
   Ipan buoy..........82 Degrees.
Max Heat Index.........Around 95.
Winds...............East at 10 to 15 mph.

.TONIGHT...
Rip Current Risk.....Moderate *.
Surf Height
      North facing reefs............3 to 5 feet.
      East  facing reefs............5 to 7 feet.
      South facing reefs............2 to 4 feet.
      West  facing reefs............2 to 4 feet.
Swell/Period
      Primary swell................East at 3 to 5 feet.
      Primary period...............9 seconds.
      Secondary swell..............North at around 2 feet.
      Secondary period.............9 seconds.
Winds...............East at 10 to 15 mph.

.MONDAY...
Rip Current Risk.....Moderate *.
Surf Height
      North facing reefs............3 to 5 feet.
      East  facing reefs............5 to 7 feet.
      South facing reefs............2 to 4 feet.
      West  facing reefs............2 to 4 feet.
Swell/Period
      Primary swell................East at 3 to 5 feet.
      Primary period...............8 seconds.
      Secondary swell..............North at around 2 feet.
      Secondary period.............8 seconds.
Max Heat Index.........Around 95.
Winds...............East at 10 to 15 mph.


Tide information for the next 36 hours...

At Apra Harbor, Guam...
Low  tide -0.6 feet at  1:21 AM Sunday
High tide  2.0 feet at  8:45 AM Sunday
Low  tide  1.4 feet at  1:47 PM Sunday
High tide  2.1 feet at  6:34 PM Sunday
Low  tide -0.6 feet at  1:57 AM Monday
High tide  2.0 feet at  9:13 AM Monday
Low  tide  1.3 feet at  2:22 PM Monday

At Rota Island...
Low  tide -0.6 feet at  1:15 AM Sunday
High tide  1.9 feet at  8:42 AM Sunday
Low  tide  1.3 feet at  1:41 PM Sunday
High tide  1.9 feet at  6:31 PM Sunday
Low  tide -0.6 feet at  1:51 AM Monday
High tide  1.9 feet at  9:10 AM Monday
Low  tide  1.3 feet at  2:16 PM Monday

At Tinian Island...
Low  tide -0.2 feet at 12:58 AM Sunday
High tide  1.5 feet at  8:43 AM Sunday
Low  tide  0.5 feet at  1:24 PM Sunday
High tide  1.5 feet at  6:32 PM Sunday
Low  tide -0.2 feet at  1:34 AM Monday
High tide  1.5 feet at  9:11 AM Monday
Low  tide  0.4 feet at  1:59 PM Monday

At Tanapag Harbor, Saipan...
Low  tide -0.3 feet at  1:25 AM Sunday
High tide  2.1 feet at  9:00 AM Sunday
Low  tide  1.7 feet at  1:39 PM Sunday
High tide  2.1 feet at  6:25 PM Sunday
Low  tide -0.4 feet at  2:02 AM Monday
High tide  2.1 feet at  9:28 AM Monday
Low  tide  1.6 feet at  2:21 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.

$$