Umatac Surf Break

Lat Long: 13.29° N 144.66° E

GUAM

Umatac WaveFinder

Issued: 9 am 31 Aug 2026 (local time)

Forecast update in  hr  min

Today's Umatac sea temperature is
29.6°C
0.3° 

Umatac surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


Umatac surf forecast from 31 Aug 2026:

  • Best quality surf: Wednesday 2 Sep, 1PM (local time) - 5.5ft (1.7m), 9s period, W swell with glassy winds.
  • Most powerful swell: Friday 4 Sep, 7AM (local time) - 13ft (4.0m), 10s period, WSW swell with 3,167 kJ wave energy.
  • Next surfable swell (1★+): Wednesday 2 Sep, 1PM (local time) - 5.5ft (1.7m), 9s period with W swell.

Best Forecast Surf Conditions for Umatac this week:

The surf forecast for Umatac over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Wednesday (Sep 02) at 1PM. The primary swell is predicted to be 1.7m and 9s period. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Umatac in the next 16 days are 4.0m 10s and forecast to arrive on Friday (Sep 04) at 7AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.0m 6s period and expected on Wednesday (Sep 02) at 4AM.

Wave TypeTime (ChST) & Date Wave Height & Period
Next good surf (1 star+) 1PM (Wed 2nd Sep)5.5ft (1.7m) 9s
Best Surf 1PM (Wed 2nd Sep)5.5ft (1.7m) 9s
Most Powerful 7AM (Fri 4th Sep)13ft (4.0m) 10s

Table - best surf conditions forecast for Umatac over the next 16 days.


  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
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