
Surf Forecasts:
Castles surf forecast from 7 Aug 2026:
- Best quality surf: Friday 7 Aug, 6PM (local time) - 5ft (1.5m), 17s period, SW swell with offshore winds.
- Most powerful swell: Monday 10 Aug, 6AM (local time) - 11ft (3.5m), 17s period, SW swell with 6,616 kJ wave energy.
- Next surfable swell (1★+): Friday 7 Aug, 6PM (local time) - 5ft (1.5m), 17s 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 Friday (Aug 07) at 6PM. The primary swell is predicted to be 1.5m and 17s 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 3.5m 17s and forecast to arrive on Monday (Aug 10) at 6AM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 3s period and expected on Saturday (Aug 08) at 12AM.
| Wave Type | Time (ACST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6PM (Fri 7th Aug) | 5ft (1.5m) 17s |
| Best Surf | 6PM (Fri 7th Aug) | 5ft (1.5m) 17s |
| Most Powerful | 6AM (Mon 10th Aug) | 11ft (3.5m) 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 on the menu for the next couple of weeks. We’ve only got one spot in the mix, so all eyes are on Castles.
We’re kicking off a long stretch of swell, but unfortunately, the opening days are a bit of a bust. The conditions are messy, with strong winds and the surf quality is poor. You’ll have to wait until the second week for anything really worth getting excited about.
The first real glimmer of hope comes on the morning of Saturday the 15th. We’ve got a solid SW groundswell running at 6 ft, with a period of 16 seconds. The wind is a light ESE breeze, which is cross-offshore, keeping the waves clean. The wave energy is significant at 1878, so there’s plenty of power. This is a standout window for experienced surfers, and it’s the best call on offer. It’s a reef break, so the long-period groundswell should wrap in nicely, and being a consistent spot, you know it’ll be breaking. Castles can get crowded sometimes, so expect company.
Following that, the morning of Sunday the 16th trims down a bit, with 4 ft of SW swell at 14 seconds, but the wind goes fully offshore out of the ENE. That’s going to give you some glassy, clean walls. The energy is light at 520, so it’s a more mellow session, but the quality will be there for a fun paddle.
Looking further out, the morning of Tuesday the 18th is another standout. The swell bumps up to 6 ft from the SW, with a 17-second period, and the wind is a clean offshore from the NE. The energy is strong at 1663, and with a moderate offshore breeze, it should be a rippable morning. By the afternoon, the wind drops to a light offshore from the ENE, keeping the 5 ft swell clean and lined up. This is a solid call for the second week, though it’s a bit further out, so keep an eye on the forecasts.
The days around the 20th have some size, with 7 ft of SW swell, but the wind is messy, and the quality is marginal. The long-period swells keep coming through, but without the right wind, it’s not the best bet.
For the beginners out there, Thursday morning the 20th sees 6 ft swell, which is pushing the limits, and the wind is strong, so it’s not the one. The swells over 8 ft that pop up in the first week are only for experts, and the wind was blowing onshore, making it a kite-surfing kind of setup rather than a paddle session.
The water temperature sits at 60°F, which is about normal for this time of year, so no surprises there.
So, to wrap it up: the early days are a write-off, but the 15th and 16th are your best bets for clean, surfable waves. The 18th is a promising long-range option. Hang tight, the good stuff is coming.
Rusty.
Short Range ForecastHeavy rain (total 28mm), heaviest during Sat night. Very mild (max 18°C on Fri morning, min 10°C on Sat night). Winds increasing (light winds from the NNW on Sat morning, near gales from the WSW by Sun morning). | Days 4-6 Weather SummaryLight rain (total 7mm), mostly falling on Tue night. Very mild (max 16°C on Mon afternoon, min 9°C on Tue afternoon). Winds increasing (light winds from the NW on Mon afternoon, near gales from the WSW by Tue night). | ||||||||||||||||||||
Friday 7 | Saturday 8 | Sunday 9 | Monday 10 | Tuesday 11 | Wednesday 12 | Thursday 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 16 | SW 17 | SW 16 | SW 16 | SW 15 | SW 14 | WSW 9 | SW 11 | SW 17 | SW 17 | SW 16 | SW 16 | SW 14 | WSW 9 | WSW 11 | SW 19 | SW 17 | SW 16 | SW 16 | SW 16 | SW 15 |
Wave Graph | |||||||||||||||||||||
1256 | 1275 | 1039 | 1074 | 856 | 1092 | 1411 | 2130 | 5283 | 3674 | 4523 | 1513 | 590 | 1377 | 2128 | 5766 | 4948 | 3820 | 3311 | 2768 | 1760 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross-off | cross | cross | cross-on | on | on | on | cross-on | cross-on | cross | cross | cross-on | on | on | on | on | on | cross-on | cross |
High Tide | 12:11PM0.76m | 11:17AM0.96m | 2:07AM0.58m | 11:38AM1.14m | 1:00AM0.58m | 12:03PM1.28m | 00:48AM0.63m | 12:27PM1.36m | 00:49AM0.71m | 12:48PM1.38m | 00:57AM0.80m | 1:06PM1.36m | 1:08AM0.91m | ||||||||
Low Tide | 8:14PM0.26m | 7:25PM0.20m | 4:19AM0.56m | 7:12PM0.14m | 5:06AM0.41m | 7:16PM0.11m | 5:37AM0.27m | 7:23PM0.11m | 6:04AM0.16m | 7:30PM0.12m | 6:29AM0.08m | 7:34PM0.13m | |||||||||
7:22 | — | — | 7:22 | — | — | 7:20 | — | — | 7:20 | — | — | 7:18 | — | — | 7:18 | — | — | 7:16 | — | — | |
— | 6:05 | — | — | 6:05 | — | — | 6:06 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:08 | — | |
mm | — | 1 | 1 | 2 | 4 | 11 | 6 | 3 | — | — | — | — | — | 3 | 4 | — | — | — | — | — | — |
Temp °C | 18 | 18 | 17 | 18 | 18 | 15 | 12 | 13 | 13 | 14 | 16 | 16 | 15 | 12 | 14 | 14 | 14 | 15 | 15 | 15 | 16 |
Feels °C | 12 | 14 | 12 | 14 | 14 | 10 | 1 | 1 | 3 | 9 | 13 | 11 | 6 | 2 | 5 | 6 | 7 | 11 | 11 | 11 | 13 |
Swell 1 Height (m) Direction Period (s) | SW 16 | SW 17 | SW 16 | SW 16 | SW 15 | SW 14 | — | — | — | SW 17 | SW 16 | SW 16 | SW 14 | — | — | — | — | — | SW 16 | SW 16 | SW 15 |
1256 | 1275 | 1039 | 1074 | 856 | 1092 | — | — | — | 3674 | 4523 | 1513 | 590 | — | — | — | — | — | 3311 | 2768 | 1760 | |
Swell 2 Height (m) Direction Period (s) | — | NW 4 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
— | 6 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | NNW 4 | — | N 3 | — | NW 4 | WSW 14 | WSW 9 | SW 11 | SW 17 | — | SW 16 | NNW 4 | NW 5 | WSW 9 | WSW 11 | SW 19 | SW 17 | SW 16 | SW 16 | SW 16 | — |
16 | — | 5 | — | 8 | 1076 | 1411 | 2130 | 5283 | — | 3067 | 17 | 115 | 1377 | 2128 | 5766 | 4948 | 3820 | 64 | 63 | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 402 | 1 | 203 | 401 | 178 | 564 | 564 | 633 | 1111 | 1457 | 510 | 649 | 1228 | 1228 | 1344 | 1229 | 1229 | 1232 | 1219 | 510 | 1 |
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.











