Shag Beach surf forecast from 5 Sep 2026:
- Best quality surf: Friday 11 Sep, 12AM (local time) - 4ft (1.2m), 19s period, S swell with offshore winds.
- Most powerful swell: Saturday 12 Sep, 9PM (local time) - 16ft (5.0m), 16s period, SSW swell with 12,172 kJ wave energy.
- Next surfable swell (1★+): Monday 7 Sep, 12AM (local time) - 2ft (0.6m), 15s period with S swell.
Best Forecast Surf Conditions for Shag Beach this week:
The surf forecast for Shag Beach over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Monday (Sep 07) at 12AM. The primary swell is predicted to be 0.6m and 15s period with a secondary swell of 0.9m and 9s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Shag Beach in the next 16 days are 5.0m 16s and forecast to arrive on Saturday (Sep 12) at 9PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.3m 5s period and expected on Thursday (Sep 10) at 3PM.
| Wave Type | Time (NZST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12AM (Mon 7th Sep) | 2ft (0.6m) 15s |
| Best Surf | 12AM (Fri 11th Sep) | 4ft (1.2m) 19s |
| Most Powerful | 9PM (Sat 12th Sep) | 16ft (5.0m) 16s |
Table - best surf conditions forecast for Shag Beach 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