Kugenuma Rivermouth surf forecast from 22 Aug 2026:
- Best quality surf: Monday 24 Aug, 6AM (local time) - 1.5ft (0.5m), 17s period, SSE swell with cross-offshore winds.
- Most powerful swell: Tuesday 25 Aug, 12AM (local time) - 6ft (1.8m), 15s period, SSE swell with 1,421 kJ wave energy.
- Next surfable swell (1★+): Sunday 23 Aug, 3AM (local time) - 1.5ft (0.5m), 9s period with S swell.
Best Forecast Surf Conditions for Kugenuma Rivermouth this week:
The surf forecast for Kugenuma Rivermouth over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Sunday (Aug 23) at 3AM. The primary swell is predicted to be 0.5m and 9s period with a secondary swell of 0.2m and 10s. Another secondary swell of 0.4m and 4s is also forecast. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Kugenuma Rivermouth in the next 16 days are 1.8m 15s and forecast to arrive on Tuesday (Aug 25) at 12AM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 9s period and expected on Tuesday (Aug 25) at 9AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3AM (Sun 23rd Aug) | 1.5ft (0.5m) 9s |
| Best Surf | 6AM (Mon 24th Aug) | 1.5ft (0.5m) 17s |
| Most Powerful | 12AM (Tue 25th Aug) | 6ft (1.8m) 15s |
Table - best surf conditions forecast for Kugenuma Rivermouth 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)
Nearest