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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 2 pm Monday 18 May 2026 ACSTForecast update in hr min s Forecast update imminent
Castles surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Castles sea temperature is
18.4° C
(Which is normal for this time of year)How big are the waves at Castles today?
The current surf forecast for Castles at 6PM is: 1.2m 12s primary swell from a Southwest direction and 0.1m 21s secondary swell from a Southwest direction (forecast issued at 02:30pm May 18). The wind direction is predicted to be onshore.
| Time (ACST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (18 May) | - | - |
| Afternoon (18 May) | 3.5ft (1.0m) | 12s |
| Evening (18 May) | 3ft (0.9m) | 12s |
Table - waves today at Castles. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastMostly dry. Very mild (max 19°C on Thu morning, min 14°C on Wed morning). Wind will be generally light. | ||||||||||||||||||||||||
Mon 18 | Tuesday 19 | Wednesday 20 | Thu 21 | |||||||||||||||||||||
12 PM | 3 PM | 6 PM | 9 PM | 12 AM | 3 AM | 6 AM | 9 AM | 12 PM | 3 PM | 6 PM | 9 PM | 12 AM | 3 AM | 6 AM | 9 AM | 12 PM | 3 PM | 6 PM | 9 PM | 12 AM | 3 AM | 6 AM | 9 AM | |
Swell Height Map |    |    |    |    | ||||||||||||||||||||
SW 12 | SW 12 | SW 12 | SW 12 | SW 12 | SW 11 | SW 11 | SW 11 | SW 12 | SW 12 | SW 11 | SW 11 | SW 11 | SW 11 | SW 11 | SW 11 | SW 16 | SW 16 | SW 16 | SW 15 | SW 15 | SW 14 | SW 14 | SW 14 | |
367 | 277 | 403 | 232 | 190 | 245 | 273 | 320 | 383 | 376 | 363 | 357 | 304 | 263 | 263 | 224 | 306 | 302 | 295 | 284 | 262 | 528 | 520 | 520 | |
Wind (km/h) | ||||||||||||||||||||||||
on | on | on | cross-on | on | on | on | on | cross-on | cross-on | cross-on | cross | cross | cross-off | glassy | off | glassy | cross | cross-off | cross-off | off | off | cross-off | cross-off | |
High Tide | 00:41AM0.65m | 1:28PM1.39m | 00:40AM0.65m | 1:48PM1.28m | 00:38AM0.67m | |||||||||||||||||||
Low Tide | 7:54PM0.24m | 6:18AM0.01m | 8:13PM0.36m | 6:32AM0.02m | 8:25PM0.45m | 6:47AM0.06m | ||||||||||||||||||
 | |  | | | | |  | | |  |  | | | | | | | | | | | | | |
 | — | — | — | — | — | — | 7:20 | — | — | — | — | — | — | — | 7:22 | — | — | — | — | — | — | — | 7:22 | — |
 | — | 5:46 | — | — | — | — | — | — | — | 5:46 | — | — | — | — | — | — | — | 5:45 | — | — | — | — | — | 5:45 |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Temp °C | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 17 | 17 | 17 | 16 | 16 | 15 | 15 | 15 | 14 | 16 | 17 | 15 | 15 | 16 | 15 | 15 | 15 |
13 | 12 | 12 | 13 | 14 | 14 | 14 | 15 | 14 | 14 | 13 | 14 | 13 | 14 | 14 | 13 | 15 | 15 | 12 | 13 | 13 | 11 | 11 | 11 | |
Swell 1 Height (m) Direction Period (s) | SW 12 | SW 12 | SW 12 | SW 12 | SW 12 | SW 11 | SW 20 | SW 19 | SW 18 | SW 12 | SW 11 | SW 11 | SW 11 | SW 11 | SW 11 | SW 11 | SW 11 | SW 12 | SW 11 | SW 11 | SW 11 | SW 14 | SW 14 | SW 14 |
 kJ | 367 | 277 | 403 | 232 | 190 | 245 | 60 | 58 | 112 | 376 | 363 | 357 | 304 | 263 | 263 | 224 | 228 | 254 | 217 | 217 | 183 | 528 | 520 | 520 |
Swell 2 Height (m) Direction Period (s) | SW 21 | SW 21 | SW 21 | SW 21 | SW 20 | SW 20 | SW 20 | SW 19 | SW 18 | SW 18 | SW 18 | SW 18 | SW 18 | SW 17 | SW 16 | SW 16 | SW 16 | SW 16 | SW 16 | SW 15 | SW 15 | — | — | — |
| kJ | 18 | 18 | 18 | 17 | 60 | 60 | 97 | 93 | 155 | 155 | 112 | 155 | 192 | 188 | 169 | 211 | 306 | 302 | 295 | 284 | 262 | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | SW 12 | SW 12 | — | SW 4 | SW 4 | — | SW 11 | SW 11 | SW 12 | SW 18 | SSW 18 | SW 11 | — | — | — | — | — | — | — | — | E 3 | ENE 3 | NE 2 | — |
| kJ | 38 | 37 | — | 8 | 5 | — | 273 | 320 | 383 | 80 | 124 | 32 | — | — | — | — | — | — | — | — | 1 | 1 | 1 | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 633 | 1052 | 648 | 648 | 648 | 649 | 648 | 940 | 1035 | 1049 | 552 | 1 | 1 | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 0 |
Best forecast wave conditions in Nullarbor | ||||||||||||||||||||||||
Best forecast wave conditions in Australia | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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