Surf Forecasts:
Castles surf forecast from 30 Aug 2026:
- Best quality surf: Saturday 5 Sep, 9PM (local time) - 8ft (2.5m), 16s period, SW swell with offshore winds.
- Most powerful swell: Saturday 5 Sep, 3PM (local time) - 8ft (2.5m), 16s period, SW swell with 3,761 kJ wave energy.
- Next surfable swell (1★+): Monday 31 Aug, 6AM (local time) - 4.5ft (1.3m), 16s 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 31) at 6AM. The primary swell is predicted to be 1.3m and 16s period with a secondary swell of 0.8m and 19s. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Castles in the next 16 days are 2.5m 16s and forecast to arrive on Saturday (Sep 05) at 3PM. Winds are predicted to be onshore 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 6AM.
| Wave Type | Time (ACST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6AM (Mon 31st Aug) | 4.5ft (1.3m) 16s |
| Best Surf | 9PM (Sat 5th Sep) | 8ft (2.5m) 16s |
| Most Powerful | 3PM (Sat 5th Sep) | 8ft (2.5m) 16s |
Table - best surf conditions forecast for Castles over the next 16 days.
The Lowdown
Alright crew, Rusty here again, but this time in feet and miles. We’ve got a solid run of surf coming down the pipe, but it’s a bit of a mixed bag with the wind. The main player is Castles, a reef setup that’s exposed to the swell but needs that clean window to shine.
The first real chance to get wet kicks off Sunday afternoon, the 30th of August. The water is sitting at 60°, which is bang on average for this time of year, so no surprises there. A clean 4ft swell from the SW with a very long 19-second period and a gentle offshore breeze from the East. That’s a proper groundswell – the energy is right up there (1016), and the conditions will be clean and lined up. This is a standout moment for the experienced crew; the long period might make it a bit tricky at the reef, but it’ll be worth the paddle.
Monday the 31st hangs in there with 5ft SW swell, but the wind swings around to a cross-off and picks up, so it’s not as pristine. The energy is still strong (1642), but it’s a step down from Sunday.
The middle of the week gets messy. Tuesday through to Thursday morning are a write-off with onshore winds and poor conditions. The swell is there, but the wind is ruining the party. Thursday afternoon the 3rd of September shows a glimmer of hope with a 5ft SW swell and light cross-shore wind, but the energy drops (979) and the quality is marginal.
Now, the real action starts to build again. Friday the 4th of September has a 6ft SW swell but the wind is howling at 25 mph from the North, keeping it clean but messy. By the afternoon that swell jumps to 7ft, but the wind goes full onshore from the West, and it’s a total washout.
We hit a rough patch from Friday afternoon all the way through to Monday the 7th. The swell is pumping, pushing 7ft to 7ft, but the wind is either onshore or cross-on with gale-force gusts. The energy figures are massive for the 7th (3252), but it’s blown out and dangerous. This stretch is more for kite surfers than paddle surfers.
Tuesday the 8th and Wednesday the 9th of September see a big, powerful SW groundswell roll in, with heights climbing to 8ft by Wednesday afternoon. The energy is through the roof (5951). The wind is cross-shore, which is a compromise, but the size is expert territory. This is a standout for the bold and the experienced, but it’s not for the faint of heart.
Thursday the 10th of September is a proper highlight. 7ft of SW swell, clean and glassy with a light offshore breeze from the NE. The energy is strong (2188), and the wave comment says it all – excellent conditions for experienced surfers. This is a day to clear the calendar for.
The final weekend, the 13th of September, brings another big pulse. 8ft SW swell on Sunday morning with a North-Northeast cross-off breeze. The energy is absolutely cranking (5785), and it’s clean. This is another standout session for the experts, with a raw, powerful swell.
The 14th of September tries to keep the party going with 8ft swell, but the wind gets messy again, so it’s a goodbye wave for the period.
Overall, the best of the best are Sunday afternoon the 30th of August for that clean, long-period grace, and Thursday the 10th of September for the punchy, offshore perfection. The 13th of September is also a monster for the brave.
Rusty, signing off.
Short Range ForecastMostly dry. Warm (max 25°C on Tue morning, min 13°C on Tue night). Winds decreasing (fresh winds from the N on Mon night, calm by Wed night). | Days 4-6 Weather SummaryLight rain (total 4mm), mostly falling on Thu night. Warm (max 22°C on Fri morning, min 13°C on Sat night). Mainly strong winds. | ||||||||||||||||||||
Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | Saturday 5 | Sunday 6 | |||||||||||||||
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 19 | SW 18 | SW 16 | SW 16 | SW 15 | SW 16 | SW 16 | SW 14 | SW 14 | SW 14 | SW 14 | SW 15 | SW 15 | SW 15 | SW 15 | SW 16 | SW 16 | SW 16 | WSW 15 | WSW 14 | SW 12 |
Wave Graph | |||||||||||||||||||||
1642 | 1453 | 909 | 692 | 355 | 1123 | 692 | 1094 | 1196 | 990 | 1029 | 1882 | 1706 | 2517 | 1568 | 2901 | 3761 | 2736 | 2015 | 3331 | 2449 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross-off | cross | on | cross-on | on | on | glassy | cross | cross | cross-off | cross | on | on | on | on | off | cross-off | on | on |
High Tide | 1:40PM1.24m | 1:55AM1.26m | 1:54PM1.12m | 2:17AM1.24m | 2:01PM0.98m | 2:38AM1.18m | 1:55PM0.86m | 2:56AM1.07m | 1:20PM0.80m | 3:04AM0.92m | 12:18PM0.85m | 2:38AM0.77m | 11:43AM0.99m | 1:29AM0.68m | |||||||
Low Tide | 7:45PM-0.04m | 8:01AM0.06m | 7:57PM-0.01m | 8:24AM0.19m | 8:04PM0.03m | 8:42AM0.36m | 8:05PM0.07m | 8:45AM0.54m | 7:54PM0.11m | 7:58AM0.69m | 7:31PM0.13m | 6:09AM0.69m | 7:06PM0.13m | ||||||||
6:56 | — | — | 6:56 | — | — | 6:54 | — | — | 6:52 | — | — | 6:52 | — | — | 6:50 | — | — | 6:48 | — | — | |
— | 6:20 | — | — | 6:20 | — | — | 6:21 | — | — | 6:22 | — | — | 6:22 | — | — | 6:22 | — | — | 6:23 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | 4 | — | — | — | — | — | — | 6 | 4 | 2 |
Temp °C | 21 | 24 | 24 | 25 | 18 | 15 | 14 | 14 | 14 | 18 | 18 | 18 | 22 | 18 | 15 | 15 | 15 | 16 | 21 | 13 | 14 |
Feels °C | 16 | 19 | 19 | 17 | 15 | 11 | 8 | 8 | 11 | 16 | 15 | 15 | 17 | 12 | 9 | 10 | 12 | 7 | 11 | 1 | 5 |
Swell 1 Height (m) Direction Period (s) | SW 19 | SW 18 | SW 16 | SW 16 | SW 15 | — | SW 16 | SW 14 | SW 14 | SW 14 | SW 14 | SW 15 | SW 15 | SW 15 | — | SW 16 | SW 16 | SW 16 | — | — | — |
1642 | 1453 | 909 | 692 | 355 | — | 692 | 1094 | 1196 | 990 | 1029 | 1882 | 1706 | 2517 | — | 2901 | 3761 | 2736 | — | — | — | |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | SW 18 | — | SW 6 | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
— | — | — | — | 307 | — | 65 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | NE 3 | — | N 3 | NNW 4 | WNW 4 | SW 16 | — | SW 14 | SW 15 | — | SW 14 | — | — | SW 15 | SW 15 | SW 16 | SW 16 | — | WSW 15 | WSW 14 | SW 12 |
2 | — | 3 | 25 | 18 | 1123 | — | 1094 | 75 | — | 47 | — | — | 1568 | 1568 | 64 | 69 | — | 2015 | 3331 | 2449 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 0 | 1 | 1344 | 510 | 940 | 1093 | 1045 | 0 | 0 | 1 | 178 | 1149 | 1228 | 1217 | 1685 | 1719 | 0 | 649 | 633 | 838 |
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.











