Surf Forecasts:
Castles surf forecast from 28 Aug 2026:
- Best quality surf: Monday 31 Aug, 3AM (local time) - 5ft (1.5m), 17s period, SW swell with offshore winds.
- Most powerful swell: Monday 31 Aug, 9AM (local time) - 5ft (1.6m), 19s period, SW swell with 1,798 kJ wave energy.
- Next surfable swell (1★+): Saturday 29 Aug, 3AM (local time) - 3.5ft (1.1m), 14s period with SW swell.
Best Forecast Surf Conditions for Castles this week:
The surf forecast for Castles over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Saturday (Aug 29) at 3AM. The primary swell is predicted to be 1.1m and 14s period. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Castles in the next 16 days are 1.6m 19s and forecast to arrive on Monday (Aug 31) at 9AM. Winds are predicted to be cross-offshore 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 (Sep 01) at 9AM.
| Wave Type | Time (ACST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3AM (Sat 29th Aug) | 3.5ft (1.1m) 14s |
| Best Surf | 3AM (Mon 31st Aug) | 5ft (1.5m) 17s |
| Most Powerful | 9AM (Mon 31st Aug) | 5ft (1.6m) 19s |
Table - best surf conditions forecast for Castles over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s talk about what’s coming at Castles over the next couple of weeks.
We’ve got a nice little pulse for the weekend. Saturday morning is looking clean with a 3ft southwest groundswell, 14-second period, and a light offshore breeze out of the northeast. Castles is a reef break and it’s consistent, so expect some fun little walls. Crowds can show up sometimes, so early is better. Water temp is about what you’d expect for late summer.
Sunday morning gets even better: the swell drops to 2ft, but the period stretches out to a very long 19 seconds. That’s pure energy from a distant storm. Light offshore wind from the east-northeast will have it glassy. The combined energy is sitting at 452 – moderate but clean. This is the kind of morning you don’t want to miss.
Monday the 31st brings the swell up to 5ft with that same 19-second period in the morning. Winds are cross-offshore so it should be tidy. The combined energy jumps into strong territory at 1798. This is pushing into intermediate zone – still fun for experienced surfers, but maybe a bit much for a learner.
Then we hit a rough spell. From Tuesday through the first week of September, the wind is all over the place – onshore and cross-shore with moderate to fresh breezes. There’s swell there, but it’s lumpy and chopped out. Wednesday the 2nd looks a little tempting with 4ft and 16-second swell, but the wind is cross-onshore and it’s just marginal. I’d sit that one out.
Things start to turn around on Thursday the 10th of September. Thursday morning is a real standout: 4ft of southwest groundswell at 17 seconds, with a glassy offshore from the east-northeast. Combined energy is a solid 1050. This one is marked for experienced surfers. The reef will be running nicely.
The best session of the whole outlook lands on Saturday the 12th of September. Saturday morning brings 5-6ft of long-period southwest groundswell at 17 seconds, with light offshore winds. The combined energy is 1682 – strong and clean. This is one for the crew who know the lineup. Not for beginners, but if you can handle it, this is the wave to chase.
So, bottom line: the first weekend (29th and 30th) is your call for fun, clean waves. The absolute standout is Saturday the 12th of September for a more serious, powerful session. The first week of September is a skip.
Rusty.
Short Range ForecastMostly dry. Warm (max 24°C on Mon afternoon, min 18°C on Sun morning). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 25°C on Tue morning, min 13°C on Tue night). Winds decreasing (fresh winds from the NW on Tue morning, light winds from the W by Wed morning). | ||||||||||||||||||
Saturday 29 | Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | ||||||||||||||
Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map |  |  |  |  |  |  |  | ||||||||||||
Wave Height (m) Direction Period (s) | SW 14 | SW 14 | SW 13 | SW 13 | SW 19 | SW 19 | SW 17 | SW 19 | SW 18 | SW 16 | SW 16 | SW 17 | SW 16 | SW 16 | SW 15 | SW 14 | SW 14 | SW 14 | SW 14 |
Wave Graph  | |||||||||||||||||||
 kJ | 536 | 331 | 290 | 193 | 236 | 897 | 1050 | 1798 | 1453 | 1014 | 719 | 822 | 1215 | 692 | 1325 | 984 | 862 | 837 | 878 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | off | cross-off | cross-off | off | cross-off | cross-off | cross-off | cross-off | cross-off | cross | on | cross-on | cross-on | on | cross-off | cross | cross-on | cross-on |
High Tide | 00:53AM1.09m | 1:03PM1.40m | 1:13AM1.18m | 1:22PM1.34m | 1:34AM1.23m | 1:40PM1.24m | 1:55AM1.26m | 1:54PM1.12m | 2:17AM1.24m | 2:01PM0.98m | 2:38AM1.18m | 1:55PM0.86m | 2:56AM1.07m | ||||||
Low Tide | 6:45AM-0.05m | 7:18PM-0.05m | 7:10AM-0.06m | 7:32PM-0.05m | 7:36AM-0.03m | 7:45PM-0.04m | 8:01AM0.06m | 7:57PM-0.01m | 8:24AM0.19m | 8:04PM0.03m | 8:42AM0.36m | 8:05PM0.07m | |||||||
 |  |  |  | | | | | | | | | | | | | | | | |
 | — | 6:58 | — | — | 6:58 | — | — | 6:56 | — | — | 6:56 | — | — | 6:54 | — | — | 6:52 | — | — |
 | 6:17 | — | 6:19 | — | — | 6:19 | — | — | 6:20 | — | — | 6:20 | — | — | 6:21 | — | — | 6:22 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 23 | 21 | 22 | 21 | 21 | 22 | 19 | 22 | 24 | 23 | 25 | 19 | 14 | 15 | 15 | 14 | 18 | 16 | 15 |
Feels °C | 19 | 17 | 17 | 17 | 17 | 18 | 15 | 18 | 19 | 17 | 17 | 12 | 10 | 11 | 10 | 12 | 16 | 12 | 13 |
Swell 1 Height (m) Direction Period (s) | SW 14 | SW 14 | SW 13 | SW 13 | SW 12 | SW 19 | SW 17 | SW 19 | SW 18 | SW 16 | SW 16 | SW 17 | — | SW 16 | SW 15 | SW 14 | SW 14 | SW 14 | SW 14 |
| kJ | 536 | 331 | 290 | 193 | 216 | 897 | 1050 | 1798 | 1453 | 1014 | 719 | 822 | — | 692 | 1325 | 984 | 862 | 837 | 878 |
Swell 2 Height (m) Direction Period (s) | — | SW 23 | SW 23 | SW 21 | SW 19 | — | SW 21 | — | — | — | — | — | — | SW 6 | — | — | — | — | — |
| kJ | — | 21 | 21 | 160 | 236 | — | 162 | — | — | — | — | — | — | 67 | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | SW 20 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | 15 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | E 3 | — | SE 3 | SE 4 | — | SE 3 | SE 4 | NNE 2 | — | — | NNW 4 | WNW 4 | SW 16 | — | — | — | — | — | — |
| kJ | 3 | — | 1 | 9 | — | 1 | 8 | 1 | — | — | 24 | 11 | 1215 | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 0 | 0 | 1 | 0 | 0 | 1 | 1 | 0 | 0 | 1 | 1227 | 501 | 648 | 510 | 510 | 0 | 1 | 178 | 940 |
Best forecast wave conditions in Nullarbor | |||||||||||||||||||
Best forecast wave conditions in Australia | |||||||||||||||||||
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The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Castles surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
Information about the Castles Surf forecast
The above surf forecast table for Castles provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Castles can be found by selecting the local surf guide option on the grey menu. Our Castles surf forecast is unique since it includes wave energy (power) that defines the real feel of the surf rather than just the height or the period. If you surf the same spot (Castles) regularly then make a mental note of the wave energy from the surf forecast table each time you go. Very soon you may start to choose your surf days based on the wave energy alone combined with our forecast of favourable offshore wind conditions. Our star ratings will help here and of course you will also find the usual wave height and period predictions on our surf forecasts as well as a full break down of the swell components under our advanced users option (to reveal that, click the little Einstein character under the tide times).
Further information to help with frequently asked questions about our surf forecast for Castles may be found under the help tab on the top menu and also by moving your mouse over the question marks on the surf forecast table itself. Please always bear in mind that the forecast is for near-shore open water and local factors at each surf break influence the actual breaking wave height, such as the beach / reef profile, water depths offshore and shelter.
Are you planning a holiday in Nullarbor? If you are looking for accommodation near Castles, camping, hotels and holiday cottages in Nullarbor, consider staying in Thevenard which is 64 km (40 miles) away.
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