Grandma's surf forecast from 22 Aug 2026:
- Best quality surf: Thursday 27 Aug, 11AM (local time) - 3.5ft (1.1m), 17s period, S swell with offshore winds.
- Most powerful swell: Thursday 27 Aug, 11AM (local time) - 3.5ft (1.1m), 17s period, S swell with 716 kJ wave energy.
- Next surfable swell (1★+): Saturday 22 Aug, 2PM (local time) - 2ft (0.6m), 16s period with SSW swell.
Best Forecast Surf Conditions for Grandma's this week:
The surf forecast for Grandma's over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Saturday (Aug 22) at 2PM. The primary swell is predicted to be 0.6m and 16s period with a secondary swell of 0.4m and 12s. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Grandma's in the next 16 days are 1.1m 17s and forecast to arrive on Thursday (Aug 27) at 11AM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.9m 6s period and expected on Sunday (Aug 23) at 5AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2PM (Sat 22nd Aug) | 2ft (0.6m) 16s |
| Best Surf | 11AM (Thu 27th Aug) | 3.5ft (1.1m) 17s |
| Most Powerful | 11AM (Thu 27th Aug) | 3.5ft (1.1m) 17s |
Table - best surf conditions forecast for Grandma's 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