Porth Nefyn surf forecast from 25 Oct 2026:
- Best quality surf: Thursday 29 Oct, 12AM (local time) - 3.5ft (1.1m), 7s period, SW swell with offshore winds.
- Most powerful swell: Tuesday 27 Oct, 3AM (local time) - 13ft (4.0m), 11s period, SW swell with 3,291 kJ wave energy.
- Next surfable swell (1★+): Thursday 29 Oct, 12AM (local time) - 3.5ft (1.1m), 7s period with SW swell.
Best Forecast Surf Conditions for Porth Nefyn this week:
The surf forecast for Porth Nefyn over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Thursday (Oct 29) at 12AM. The primary swell is predicted to be 1.1m and 7s period with a secondary swell of 0.2m and 11s. Another secondary swell of 0.4m and 10s is also forecast. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Porth Nefyn in the next 16 days are 4.0m 11s and forecast to arrive on Tuesday (Oct 27) at 3AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.8m 6s period and expected on Wednesday (Oct 28) at 3AM.
| Wave Type | Time (GMT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12AM (Thu 29th Oct) | 3.5ft (1.1m) 7s |
| Best Surf | 12AM (Thu 29th Oct) | 3.5ft (1.1m) 7s |
| Most Powerful | 3AM (Tue 27th Oct) | 13ft (4.0m) 11s |
Table - best surf conditions forecast for Porth Nefyn 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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