
Surf Forecasts:
Castles surf forecast from 7 Sep 2026:
- Best quality surf: Tuesday 8 Sep, 12AM (local time) - 3.5ft (1.1m), 18s period, SW swell with cross-offshore winds.
- Most powerful swell: Wednesday 9 Sep, 6PM (local time) - 8ft (2.4m), 17s period, SSW swell with 3,260 kJ wave energy.
- Next surfable swell (1★+): Monday 7 Sep, 12PM (local time) - 3.5ft (1.1m), 13s period with SSW 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 Monday (Sep 07) at 12PM. The primary swell is predicted to be 1.1m and 13s period with a secondary swell of 0.4m and 21s. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Castles in the next 16 days are 2.4m 17s and forecast to arrive on Wednesday (Sep 09) at 6PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.3m 6s period and expected on Wednesday (Sep 09) at 3AM.
| Wave Type | Time (ACST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12PM (Mon 7th Sep) | 3.5ft (1.1m) 13s |
| Best Surf | 12AM (Tue 8th Sep) | 3.5ft (1.1m) 18s |
| Most Powerful | 6PM (Wed 9th Sep) | 8ft (2.4m) 17s |
Table - best surf conditions forecast for Castles over the next 16 days.
The Lowdown
Alright, folks, Rusty here. Let’s have a look at what’s cooking over the next couple of weeks.
We’re starting off with a bit of a slow burner, but there’s a real window of opportunity if you’re patient. The first few days are a bit of a write-off, but hang tight because the middle of the first week brings some serious grunt.
The standout window is Tuesday, September 8th. The morning session is where it’s at. We’ve got a solid 5ft swell pushing in from the SW with a very long period of 17 seconds. That’s groundswell, folks, with serious energy (1388). The wind is a light ESE breeze, keeping conditions clean. This is excellent surf for experienced surfers – the kind of day where the lineup has that pulse. Anything over 8ft is for experts only, and this is just under that, so it’s a big, powerful wave but still manageable for the confident crew.
Castles is a reef break, and with that long-period groundswell, it’s going to line up nicely. It’s a consistent spot, so you won’t be waiting forever. The water temp is sitting about 60°F, which is pretty much average for this time of year, so a decent 4/3 will do.
The Thursday, September 10th morning is also worth a look. The swell drops a touch to 6ft from the SW, with a 16-second period. The wind goes offshore from the east at 18 mph, giving us clean, groomed faces. The energy is still strong (1571). A solid session for the intermediate to advanced crew.
Looking further out, there’s a big pulse on the cards for Saturday, September 19th. The morning shows an 8ft SW swell with a 17-second period and massive energy (3727). That’s a powerful, heavy swell. The wind is cross-off, so it’ll be clean, but this is strictly for the experts. It’s a long way out, so we’ll keep an eye on it, but it’s got some serious potential.
Before that, up to the 7th, the wind is messy and the swell is small, so you’re not missing much. The best bet is to pencil in the 8th and the 10th, and keep an eye on the 19th.
Rusty, signing off.
Short Range ForecastLight rain (total 4mm), mostly falling on Tue night. Very mild (max 16°C on Mon night, min 9°C on Wed night). Winds increasing (light winds from the SE on Mon afternoon, strong winds from the ESE by Wed morning). | Days 4-6 Weather SummaryMostly dry. Warm (max 26°C on Sat afternoon, min 9°C on Thu morning). Mainly fresh winds. | ||||||||||||||||||||
Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | |||||||||||||||
AM | PM | 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 13 | SW 13 | SW 18 | SW 17 | SW 16 | SW 16 | SW 19 | SW 18 | SW 16 | SW 16 | SW 16 | SW 15 | SW 14 | SW 15 | SW 16 | SW 15 | SW 15 | SW 18 | SW 16 | WSW 16 | SW 15 |
Wave Graph | |||||||||||||||||||||
394 | 352 | 850 | 1388 | 1511 | 1096 | 2367 | 2217 | 2386 | 1571 | 1284 | 881 | 536 | 581 | 757 | 330 | 313 | 510 | 437 | 568 | 269 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | off | cross-off | cross-off | off | off | off | cross-off | cross-off | cross-off | cross | on | cross-off |
High Tide | 11:44AM1.13m | 00:44AM0.70m | 11:57AM1.23m | 00:28AM0.79m | 12:11PM1.28m | 00:26AM0.90m | 12:24PM1.29m | 00:33AM1.03m | 12:37PM1.26m | 00:44AM1.14m | 12:48PM1.22m | 00:58AM1.24m | 12:58PM1.18m | 1:14AM1.30m | |||||||
Low Tide | 6:51PM0.12m | 5:29AM0.37m | 6:45PM0.11m | 5:45AM0.23m | 6:43PM0.10m | 6:04AM0.12m | 6:44PM0.07m | 6:23AM0.05m | 6:47PM0.04m | 6:43AM0.02m | 6:53PM-0.01m | 7:01AM0.02m | 7:01PM-0.05m | ||||||||
6:48 | — | — | 6:47 | — | — | 6:46 | — | — | 6:43 | — | — | 6:43 | — | — | 6:41 | — | — | 6:39 | — | — | |
— | 6:23 | — | — | 6:24 | — | — | 6:24 | — | — | 6:25 | — | — | 6:27 | — | — | 6:27 | — | — | 6:28 | — | |
mm | — | — | — | — | 1 | 3 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 13 | 14 | 16 | 16 | 13 | 13 | 12 | 13 | 13 | 14 | 18 | 18 | 18 | 21 | 21 | 23 | 26 | 25 | 28 | 22 | 16 |
Feels °C | 9 | 12 | 12 | 14 | 9 | 6 | 4 | 5 | 5 | 7 | 11 | 13 | 13 | 16 | 15 | 16 | 21 | 19 | 21 | 17 | 14 |
Swell 1 Height (m) Direction Period (s) | SW 13 | SW 13 | SW 18 | SW 17 | SW 16 | SW 16 | SW 19 | SW 18 | SW 16 | SW 16 | SW 16 | SW 15 | SW 14 | SW 15 | SW 16 | SW 15 | SW 15 | SW 18 | SW 16 | — | SW 15 |
394 | 352 | 850 | 1388 | 1511 | 1096 | 2367 | 2217 | 2386 | 1571 | 1284 | 881 | 536 | 581 | 757 | 330 | 313 | 510 | 437 | — | 269 | |
Swell 2 Height (m) Direction Period (s) | SW 21 | SW 20 | SW 13 | — | — | — | S 7 | — | — | — | SW 26 | SW 25 | SW 23 | — | — | SW 19 | SW 19 | S 10 | — | — | SW 4 |
71 | 204 | 202 | — | — | — | 1 | — | — | — | 26 | 25 | 21 | — | — | 181 | 177 | 16 | — | — | 3 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | S 11 | N 3 | — | — | — | W 5 |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 57 | 2 | — | — | — | 2 | |
Wind waves Height (m) Direction Period (s) | ESE 4 | SE 3 | SSE 5 | — | SSW 16 | SSE 5 | SSE 7 | S 8 | ESE 4 | E 4 | ESE 2 | E 3 | ENE 3 | — | — | NNE 3 | NNW 3 | N 3 | NNW 4 | WSW 16 | — |
20 | 3 | 30 | — | 91 | 91 | 188 | 239 | 41 | 15 | 1 | 1 | 5 | — | — | 3 | 1 | 3 | 28 | 568 | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 132 | 0 | 0 | 0 | 1052 | 1626 | 1626 | 1577 | 491 | 489 | 132 | 1 | 0 | 0 | 0 | 178 | 178 | 1 | 649 | 501 | 0 |
Best forecast wave conditions in Nullarbor | |||||||||||||||||||||
Best forecast wave conditions in Australia | |||||||||||||||||||||
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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.










