
Surf Forecasts:
Castles surf forecast from 3 Sep 2026:
- Best quality surf: Sunday 6 Sep, 3AM (local time) - 7ft (2.1m), 14s period, SW swell with cross-offshore winds.
- Most powerful swell: Wednesday 9 Sep, 12PM (local time) - 7ft (2.1m), 19s period, SW swell with 3,253 kJ wave energy.
- Next surfable swell (1★+): Sunday 6 Sep, 3AM (local time) - 7ft (2.1m), 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 Sunday (Sep 06) at 3AM. The primary swell is predicted to be 2.1m and 14s period. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Castles in the next 16 days are 2.1m 19s and forecast to arrive on Wednesday (Sep 09) at 12PM. 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 5s period and expected on Monday (Sep 07) at 12AM.
| Wave Type | Time (ACST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3AM (Sun 6th Sep) | 7ft (2.1m) 14s |
| Best Surf | 3AM (Sun 6th Sep) | 7ft (2.1m) 14s |
| Most Powerful | 12PM (Wed 9th Sep) | 7ft (2.1m) 19s |
Table - best surf conditions forecast for Castles over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s have a proper look at the coming weeks for Castles.
It’s a bit of a slow start, with the first few days looking pretty rough. We’ve got some solid swell rolling in, but the wind is just wrecking it – strong onshore and cross-off flows making for poor conditions through Friday and Saturday. You really don’t want to be out there in that.
Things finally start to turn around on Sunday the 6th. That’s our first real standout. The morning is looking clean with an offshore breeze from the ENE and a nice 6ft SW groundswell (14-second period). The energy is moderate (1244), and these longer-period swells usually mean better-shaped waves with more push, though they can be a bit straight-running at a beach setup. Castles is a reef, so that longer period will actually be a bonus – expect clean, lined-up waves. The water temp is about average for this time of year, nothing wild. This is for experienced surfers, as the size is solid.
The window opens again the following Tuesday the 8th of September morning. Another excellent call with a 5ft SW groundswell, but this one has a very long period of 17 seconds. That’s serious groundswell energy (1409). With an offshore wind, this will be world-class at this reef – super clean, powerful, and those long waits between sets will make paddling out a breeze. Another one for the experienced crew.
Away from those standouts, there’s a long stretch of average-to-poor conditions. Strong winds hammer the area right through to mid-September. You get a couple of moments like the Friday the 11th afternoon with a small 4ft swell and offshore wind, but it’s only offering “good” surf, not epic. Worth a look if you’re desperate.
The next real promise shows up deep in the forecast for Friday the 18th of September. The morning has a gentle offshore breeze and a solid 8ft SW groundswell (15 seconds). The energy is strong (2268), and conditions are set to be excellent for experienced surfers. That one is a long way off, so keep an eye on it – promising, but not locked in.
If you’re a beginner, steer clear of anything over 5ft here. The swells on the 6th, 8th, and 18th are all over that mark and into expert territory.
Overall, we’ve got two short, sharp windows of absolute magic and a whole lot of windy mess in between. Don’t hold your breath for the second week – it’s a long wait for that Friday the 18th.
Rusty.
Short Range ForecastLight rain (total 3mm), mostly falling on Sun night. Warm (max 25°C on Fri morning, min 11°C on Sat night). Winds decreasing (fresh winds from the WSW on Fri night, light winds from the E by Sat night). | Days 4-6 Weather SummaryModerate rain (total 12mm), heaviest on Mon night. Very mild (max 14°C on Mon afternoon, min 8°C on Wed night). Winds increasing (light winds from the E on Mon night, strong winds from the ESE by Wed morning). | ||||||||||||||||||||
Friday 4 | Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | |||||||||||||||
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 15 | SW 15 | SW 15 | SW 12 | SW 13 | SW 14 | SW 14 | SW 14 | SW 13 | SW 13 | SW 13 | SW 18 | SW 17 | SW 16 | SW 16 | SW 19 | SW 19 | SW 17 | SW 16 | SW 16 | SW 15 |
Wave Graph | |||||||||||||||||||||
1823 | 2490 | 1246 | 1761 | 1834 | 1680 | 1244 | 1130 | 444 | 242 | 352 | 850 | 1537 | 1276 | 1096 | 2804 | 3085 | 2442 | 1922 | 1571 | 1091 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | on | on | on | cross-on | cross | off | cross-off | cross-off | off | cross-off | cross-off | off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | off |
High Tide | 1:20PM0.80m | 3:04AM0.92m | 12:18PM0.85m | 2:38AM0.77m | 11:43AM0.99m | 1:29AM0.68m | 11:44AM1.13m | 00:44AM0.70m | 11:57AM1.23m | 00:28AM0.79m | 12:11PM1.28m | 00:26AM0.90m | 12:24PM1.29m | 00:33AM1.03m | |||||||
Low Tide | 7:54PM0.11m | 7:58AM0.69m | 7:31PM0.13m | 6:09AM0.69m | 7:06PM0.13m | 5:24AM0.54m | 6:51PM0.12m | 5:29AM0.37m | 6:45PM0.11m | 5:45AM0.23m | 6:43PM0.10m | 6:04AM0.12m | 6:44PM0.07m | ||||||||
6:52 | — | — | 6:50 | — | — | 6:48 | — | — | 6:48 | — | — | 6:47 | — | — | 6:46 | — | — | 6:43 | — | — | |
— | 6:22 | — | — | 6:22 | — | — | 6:23 | — | — | 6:23 | — | — | 6:24 | — | — | 6:24 | — | — | 6:25 | — | |
mm | — | 1 | — | — | — | — | — | — | 2 | 2 | — | 4 | 2 | 1 | 3 | — | — | — | — | — | — |
Temp °C | 25 | 20 | 17 | 14 | 13 | 13 | 15 | 16 | 13 | 12 | 14 | 13 | 12 | 13 | 13 | 11 | 14 | 11 | 13 | 16 | 15 |
Feels °C | 20 | 14 | 13 | 7 | 8 | 10 | 11 | 11 | 8 | 7 | 10 | 8 | 10 | 9 | 6 | 2 | 6 | 2 | 6 | 9 | 9 |
Swell 1 Height (m) Direction Period (s) | SW 15 | SW 15 | — | — | — | SW 14 | SW 14 | SW 14 | SW 13 | SW 13 | SW 13 | SW 18 | SW 17 | SW 16 | SW 16 | SW 19 | SW 19 | SW 17 | SW 16 | SW 16 | SW 15 |
1823 | 2490 | — | — | — | 1680 | 1244 | 1130 | 444 | 242 | 352 | 850 | 1537 | 1276 | 1096 | 2804 | 3085 | 2442 | 1922 | 1571 | 1091 | |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | SW 23 | S 6 | SW 20 | SW 13 | — | — | SSW 24 | S 7 | — | S 22 | — | — | SW 25 |
— | — | — | — | — | — | — | — | 21 | 39 | 259 | 205 | — | — | 55 | 1 | — | 9 | — | — | 25 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | SW 21 | — | — | — | — | — | — | — | — | — | — | — |
— | — | — | — | — | — | — | — | — | 71 | — | — | — | — | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | N 3 | SW 15 | SW 15 | SW 12 | SW 13 | — | — | ESE 2 | SSE 5 | E 4 | ESE 4 | SE 6 | — | — | SSE 6 | SE 6 | SE 7 | SE 8 | E 4 | — | — |
5 | 1761 | 1246 | 1761 | 1834 | — | — | 1 | 90 | 36 | 10 | 30 | — | — | 71 | 128 | 102 | 181 | 28 | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 503 | 564 | 1149 | 1035 | 1198 | 1 | 0 | 1 | 491 | 132 | 1 | 0 | 0 | 552 | 1510 | 1577 | 1522 | 491 | 243 | 132 | 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.










