Portsea Back Beach surf forecast from 21 Aug 2026:
- Best quality surf: Sunday 23 Aug, 10AM (local time) - 7.5ft (2.3m), 14s period, SW swell with cross-offshore winds.
- Most powerful swell: Saturday 22 Aug, 1PM (local time) - 13ft (4.0m), 14s period, WSW swell with 5,790 kJ wave energy.
- Next surfable swell (1★+): Sunday 23 Aug, 10AM (local time) - 7.5ft (2.3m), 14s period with SW swell.
Best Forecast Surf Conditions for Portsea Back Beach this week:
The surf forecast for Portsea Back Beach over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Sunday (Aug 23) at 10AM. The primary swell is predicted to be 2.3m and 14s period with a secondary swell of 1.1m and 18s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Portsea Back Beach in the next 16 days are 4.0m 14s and forecast to arrive on Saturday (Aug 22) at 1PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 4s period and expected on Tuesday (Aug 25) at 1PM.
| Wave Type | Time (AEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 10AM (Sun 23rd Aug) | 7.5ft (2.3m) 14s |
| Best Surf | 10AM (Sun 23rd Aug) | 7.5ft (2.3m) 14s |
| Most Powerful | 1PM (Sat 22nd Aug) | 13ft (4.0m) 14s |
Table - best surf conditions forecast for Portsea Back 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)
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