Castle Island surf forecast from 8 Jul 2026:
- Best quality surf: Sunday 12 Jul, 9PM (local time) - 5.5ft (1.7m), 7s period, W swell with offshore winds.
- Most powerful swell: Sunday 12 Jul, 12AM (local time) - 6ft (1.8m), 8s period, W swell with 388 kJ wave energy.
- Next surfable swell (1★+): Sunday 12 Jul, 9PM (local time) - 5.5ft (1.7m), 7s period with W swell.
Best Forecast Surf Conditions for Castle Island this week:
The surf forecast for Castle Island over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Sunday (Jul 12) at 9PM. The primary swell is predicted to be 1.7m and 7s period with a secondary swell of 0.4m and 9s. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Castle Island in the next 16 days are 1.8m 8s and forecast to arrive on Sunday (Jul 12) at 12AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.6m 6s period and expected on Wednesday (Jul 08) at 6PM.
| Wave Type | Time (ADT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9PM (Sun 12th Jul) | 5.5ft (1.7m) 7s |
| Best Surf | 9PM (Sun 12th Jul) | 5.5ft (1.7m) 7s |
| Most Powerful | 12AM (Sun 12th Jul) | 6ft (1.8m) 8s |
Table - best surf conditions forecast for Castle Island 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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