Surf Forecasts:
Castles surf forecast from 23 Aug 2026:
- Best quality surf: Friday 28 Aug, 6AM (local time) - 6.5ft (2.0m), 16s period, SW swell with cross-offshore winds.
- Most powerful swell: Friday 28 Aug, 12AM (local time) - 6.5ft (2.0m), 17s period, WSW swell with 2,303 kJ wave energy.
- Next surfable swell (1★+): Monday 24 Aug, 12AM (local time) - 3.5ft (1.1m), 15s 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 Monday (Aug 24) at 12AM. The primary swell is predicted to be 1.1m and 15s 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 2.0m 17s and forecast to arrive on Friday (Aug 28) at 12AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.8m 4s period and expected on Thursday (Aug 27) at 9AM.
| Wave Type | Time (ACST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12AM (Mon 24th Aug) | 3.5ft (1.1m) 15s |
| Best Surf | 6AM (Fri 28th Aug) | 6.5ft (2.0m) 16s |
| Most Powerful | 12AM (Fri 28th Aug) | 6.5ft (2.0m) 17s |
Table - best surf conditions forecast for Castles over the next 16 days.
The Lowdown
Alright, Rusty here, lookin' at the next couple of weeks for this spot. It's a mixed bag, but there's a couple of windows you don't wanna miss.
The water's sittin' around 60°, which is dead average for this time of year – nothin' special.
The main story is a solid, long-period groundswell from the SW. This is a reef break, so it's gonna love that long-period energy, giving us some proper, lined-up waves. The period is hittin' 16 seconds and even bumpin' up to 19, which is real groundswell. That means the waves will have a lot of power and shape, but the sets will be spaced out, givin' you time to get back out.
The absolute best is shapin' up for Friday, August 28th. The morning is clean with a cross-offshore wind (NNE at 12 mph) and a solid 5.9 ft SW swell. The combined energy is pumpin' at 3211 (moderate to strong), so there's plenty of power behind it. The swell is just under 8 ft, so it's a solid size for experienced surfers, but it's not completely out of reach for a strong intermediate. That's the real standout.
The next real highlight is Sunday, August 30th. The morning is glassy, clear skies, and a light offshore breeze (E at 9 mph). The swell is a bit smaller at 2.9 ft, but the period is a massive 19 seconds, and the energy is still strong at 1464. This is gonna be a clean, smooth, long-wave day – perfect for a cruisy session on a log or a fun mid-length. This is a proper stand-out for those who want quality over size.
Don't get too excited about the middle of the two weeks. After the 28th, we have a few days with clean conditions, but the swell drops off a bit. Monday, August 31st afternoon is lookin' nice: light breeze (SE at 6 mph), 4.6 ft swell, and a clean surface. It's a good, consistent option.
Then things get rough. From September 1st onwards, the wind picks up from the north and the cross-onshore wind starts to ruin the surface. The first week of September is not lookin' good at all. The swell is small and the wind is messy. There's a dead period from the 1st to the 5th, with nothin' worth paddlin' out for. It's a real blank run.
There is a tiny glimmer on Wednesday, September 3rd morning – totally glassy, 2.6 ft of swell, but it's a piddly little wave. Not worth the effort unless you're desperate.
Stick to the 28th of August and the 30th of August. Those are your two standout sessions in this 16-day window.
Short Range ForecastLight rain (total 8mm), mostly falling on Sun night. Warm (max 20°C on Sun afternoon, min 11°C on Tue night). Winds decreasing (fresh winds from the SSW on Mon afternoon, light winds from the SE by Tue night). | Days 5-7 Weather SummaryModerate rain (total 12mm), heaviest on Fri morning. Warm (max 24°C on Thu afternoon, min 14°C on Fri morning). Winds increasing (calm on Wed afternoon, fresh winds from the NNE by Thu morning). | |||||||||||||||||||
Sun 23 | Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | ||||||||||||||
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 16 | SW 15 | SW 14 | SW 14 | SW 13 | SW 15 | SW 14 | SW 14 | SW 13 | SW 12 | SW 15 | SW 14 | SW 19 | WSW 17 | SW 16 | WSW 16 | SW 14 | SW 9 | SSW 8 | SW 12 |
Wave Graph  | ||||||||||||||||||||
 kJ | 886 | 550 | 393 | 639 | 821 | 1581 | 726 | 656 | 431 | 260 | 301 | 336 | 817 | 2303 | 1675 | 1811 | 1203 | 349 | 273 | 184 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | on | cross-on | cross-on | cross-on | cross-on | off | cross-off | glassy | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | off | off | cross-off | cross-off |
High Tide | 1:02AM0.62m | 11:40AM1.06m | 00:18AM0.68m | 11:50AM1.19m | 00:13AM0.78m | 12:06PM1.30m | 00:22AM0.89m | 12:24PM1.38m | 00:36AM1.00m | 12:43PM1.41m | 00:53AM1.09m | 1:03PM1.40m | 1:13AM1.18m | |||||||
Low Tide | 7:09PM0.28m | 5:03AM0.50m | 6:40PM0.23m | 5:15AM0.35m | 6:35PM0.15m | 5:35AM0.21m | 6:40PM0.08m | 5:57AM0.09m | 6:51PM0.02m | 6:21AM0.00m | 7:04PM-0.02m | 6:45AM-0.05m | 7:18PM-0.05m | |||||||
 |  |  |  |  |  |  |  | | | | | | |  | | | | |  | |
 | — | — | 7:05 | — | — | 7:03 | — | — | 7:03 | — | — | 7:01 | — | — | 7:01 | — | — | 6:58 | — | — |
 | 6:15 | — | — | 6:15 | — | — | 6:15 | — | — | 6:16 | — | — | 6:16 | — | — | 6:17 | — | — | 6:19 | — |
mm | — | 5 | 1 | 1 | 1 | — | — | — | — | — | — | — | — | 2 | 8 | — | 2 | — | — | — |
Temp °C | 20 | 16 | 15 | 15 | 14 | 14 | 14 | 13 | 16 | 19 | 19 | 22 | 24 | 21 | 15 | 19 | 16 | 19 | 21 | 19 |
Feels °C | 15 | 13 | 12 | 9 | 9 | 9 | 10 | 11 | 13 | 16 | 15 | 15 | 17 | 16 | 12 | 14 | 10 | 16 | 17 | 16 |
Swell 1 Height (m) Direction Period (s) | SW 16 | SW 15 | SW 14 | — | — | — | SW 14 | SW 14 | SW 13 | SW 12 | SW 15 | SW 14 | SW 19 | SW 18 | SW 16 | SW 16 | SW 14 | SW 9 | SW 13 | SW 12 |
| kJ | 886 | 550 | 393 | — | — | — | 726 | 656 | 431 | 260 | 301 | 336 | 817 | 78 | 1675 | 1082 | 1203 | 349 | 205 | 184 |
Swell 2 Height (m) Direction Period (s) | — | — | SW 20 | — | — | — | — | — | — | SW 16 | SW 23 | SW 20 | SW 15 | — | — | — | — | SW 14 | SW 20 | SW 21 |
| kJ | — | — | 15 | — | — | — | — | — | — | 90 | 21 | 261 | 499 | — | — | — | — | 322 | 15 | 71 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | S 22 | SW 24 | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 9 | 22 | — |
Wind waves Height (m) Direction Period (s) | — | ENE 3 | SW 14 | SW 14 | SW 13 | SW 15 | SW 7 | — | — | — | — | N 4 | NNW 4 | WSW 17 | WSW 16 | WSW 16 | SW 14 | SSE 2 | SSW 8 | S 7 |
| kJ | — | 4 | 32 | 639 | 821 | 1581 | 96 | — | — | — | — | 19 | 9 | 2303 | 1536 | 1811 | 74 | 1 | 273 | 135 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 178 | 0 | 147 | 401 | 491 | 491 | 552 | 0 | 0 | 0 | 0 | 402 | 178 | 1 | 0 | 0 | 0 | 0 | 1 | 0 |
Best forecast wave conditions in Nullarbor | ||||||||||||||||||||
Best forecast wave conditions in Australia | ||||||||||||||||||||
Header Global | ||||||||||||||||||||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
FREE! Surf-Forecast.com widget for your website
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.
Nearest