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Castles Surf Forecast
/ SA – Nullarbor (9 breaks) / South Australia (91 breaks) /
Surf Forecasts:
Castles surfForecast / SA – Nullarbor / Australia
48hr Weather and Surf, issued 8 am Thursday 18 Sep 2025 ACST
How big are the waves at Castles today?
The current surf forecast for Castles at 2PM is: 1.1m 12s primary swell from a Southwest direction and 0.9m 12s secondary swell from a Southwest direction, 0.1m 18s secondary swell from a Southwest direction (forecast issued at 08:30am September 18). The wind direction is predicted to be onshore.
| Time (ACST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (18 Sep) | 3.5ft (1.0m) | 12s |
| Afternoon (18 Sep) | 3.5ft (1.1m) | 12s |
| Evening (18 Sep) | 3.5ft (1.1m) | 12s |
Table - waves today at Castles. (Swell directed towards the surf break)
Thursday 18 | Friday 19 | Saturday 20 | Sun 21 | |||||||||||||||||||||
| 6 AM | 9 AM | 12 PM | 3 PM | 6 PM | 9 PM | 0 AM | 3 AM | 6 AM | 9 AM | 12 PM | 3 PM | 6 PM | 9 PM | 0 AM | 3 AM | 6 AM | 9 AM | 12 PM | 3 PM | 6 PM | 9 PM | 0 AM | 3 AM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 13 | 14 | 14 | 15 | 15 | 15 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 324 | 272 | 228 | 379 | 463 | 309 | 309 | 303 | 298 | 309 | 683 | 1080 | 1426 | 1825 | 2229 | 2278 | 1996 | 1680 | 1485 | 1528 | 2317 | 1336 | 1238 | 1139 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- off | cross- off | cross- on | on | cross- on | cross- on | cross- on | on | on | on | on | on | on | cross- on | cross- on | cross- on | cross- on | cross- on | on | cross- on | cross- on | cross- on | on | on |
High Tide / height (m) | 11:52AM 1.10 | 12:21AM 0.79 | 11:55AM 1.17 | 12:12AM 0.91 | 12:04PM 1.21 | 12:16AM 1.04 | ||||||||||||||||||
Low Tide / height (m) | 5:38AM 0.43 | 6:34PM 0.17 | 5:38AM 0.30 | 6:23PM 0.13 | 5:50AM 0.18 | 6:22PM 0.08 | ||||||||||||||||||
Thursday 18 | Friday 19 | Saturday 20 | Sun 21 | |||||||||||||||||||||
| Sunrise | - | 6:33 | - | - | - | - | - | - | - | 6:31 | - | - | - | - | - | - | - | 6:31 | - | - | - | - | - | - |
| Sunset | - | - | - | - | 6:30 | - | - | - | - | - | - | - | 6:30 | - | - | - | - | - | - | - | 6:31 | - | - | - |
 |  | | | | | | | | | | | | |  |  | |  |  | | | | | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 17 | 20 | 25 | 20 | 16 | 15 | 14 | 14 | 14 | 15 | 15 | 15 | 14 | 14 | 13 | 12 | 12 | 12 | 13 | 13 | 13 | 13 | 13 | 13 |
| Feels °C (?) | 11 | 13 | 19 | 13 | 13 | 13 | 12 | 13 | 13 | 11 | 9 | 9 | 9 | 9 | 7 | 6 | 7 | 8 | 9 | 8 | 9 | 9 | 9 | 10 |
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Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
Recent Eyeball Surf Reports for SA - Nullarbor
Still cross-shore at Castles (moderate winds from the NNW at Thevenard Ntc Aws 63 km from Castles). 0.9m 12s groundswell from the SW with a 0.5m 13s groundswell, also from the SW and a 0.4m 3s local chop, also from the NNW. 3 swells combining to make bigger set waves.
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