Keta Reef Oshima Surf Break

Lat Long: 34.74° N 139.36° E

Keta Reef Oshima WaveFinder

Issued: 2 am 14 Jul 2026 (local time)

Forecast update in  hr  min

Today's Keta Reef Oshima sea temperature is
24.8° C
0.9° 

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


Keta Reef Oshima surf forecast from 13 Jul 2026:

  • Best quality surf: Tuesday 14 Jul, 9AM (local time) - 2.5ft (0.8m), 10s period, SSW swell with glassy winds.
  • Most powerful swell: Tuesday 14 Jul, 12PM (local time) - 3ft (0.9m), 11s period, SSW swell with 176 kJ wave energy.
  • Next surfable swell (1★+): Tuesday 14 Jul, 9AM (local time) - 2.5ft (0.8m), 10s period with SSW swell.

Best Forecast Surf Conditions for Keta Reef Oshima this week:

The surf forecast for Keta Reef Oshima over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Jul 14) at 9AM. The primary swell is predicted to be 0.8m and 10s period with a secondary swell of 0.6m and 11s. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Keta Reef Oshima in the next 16 days are 0.9m 11s and forecast to arrive on Tuesday (Jul 14) at 12PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.8m 5s period and expected on Saturday (Jul 18) at 6AM.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+) 9AM (Tue 14th Jul)2.5ft (0.8m) 10s
Best Surf 9AM (Tue 14th Jul)2.5ft (0.8m) 10s
Most Powerful12PM (Tue 14th Jul)3ft (0.9m) 11s

Table - best surf conditions forecast for Keta Reef Oshima over the next 16 days.


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