
Surf Forecasts:
Castles surf forecast from 24 Jul 2026:
- Best quality surf: Wednesday 29 Jul, 9AM (local time) - 6ft (1.9m), 15s period, SW swell with cross-offshore winds.
- Most powerful swell: Wednesday 29 Jul, 9AM (local time) - 6ft (1.9m), 15s period, SW swell with 1,716 kJ wave energy.
- Next surfable swell (1★+): Saturday 25 Jul, 9PM (local time) - 3.5ft (1.1m), 12s 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 Saturday (Jul 25) at 9PM. The primary swell is predicted to be 1.1m and 12s period. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Castles in the next 16 days are 1.9m 15s and forecast to arrive on Wednesday (Jul 29) at 9AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 3s period and expected on Friday (Jul 31) at 12AM.
| Wave Type | Time (ACST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9PM (Sat 25th Jul) | 3.5ft (1.1m) 12s |
| Best Surf | 9AM (Wed 29th Jul) | 6ft (1.9m) 15s |
| Most Powerful | 9AM (Wed 29th Jul) | 6ft (1.9m) 15s |
Table - best surf conditions forecast for Castles over the next 16 days.
The Lowdown
G'day, Rusty here, and I've had a good look at what's coming up for the next couple of weeks. Honestly, it's a bit of a slow start but there's some real gems down the line if you're patient.
The early days are a write-off: Saturday the 25th and Sunday the 26th are messy with light cross-onshore breezes and small, weak swell. The energy is only around 293 to 488 (weak to moderate), and the conditions are just too choppy to get excited about. Monday the 27th is even worse with a fresh breeze chopping everything up. Don't even bother packing the car just yet.
We get a bit of a lull with no real standout sessions until we hit the end of the month. There's a solid window starting Wednesday the 29th that looks like the pick of the entire forecast. The swell builds to a clean 6 ft from the SW on Wednesday morning with a 15-second period, giving it plenty of push. The combined energy jumps right up to 1716 (strong) and with a light cross-offshore breeze, the waves at Castles will be well-shaped, powerful, and clean. This is for experienced surfers only though—anything over 5 ft is pushing it for beginners, and at 6 ft, it's a proper step-up. The super long period means it'll be a bit straight at times, but for a reef break like this, it should offer some great walls. Wednesday afternoon stays clean at 6 ft and 1307 energy. Thursday the 30th morning is also a beauty with a gentle offshore breeze from the East and 5 ft SW swell at 619 energy—much more manageable and still very clean. The water temp is about average for the time of year, so no surprises there.
The real standout, though, is Saturday the 1st of August. The morning session is already good with a glassy offshore wind and 4 ft of SW swell at 16 seconds, but the afternoon is something else. The wind drops to a slight air, the swell energy rockets to 1706 (strong), and the period stretches out to a very long 22 seconds. That's a groundswell that will wrap beautifully into the reef. The waves are 3 ft but with that energy and period, expect long, clean lines. It's a four-out-of-five quality session, absolutely pristine. Crowds are sometimes an issue here, so be prepared for a few others who've been watching the same charts.
The run continues into Sunday the 2nd of August with a solid 6 ft SW swell at 17 seconds and a clean cross-offshore breeze. The energy is 1868 (strong) and the conditions are excellent for experienced surfers again. Monday the 3rd still has size at 6 ft, but the wind picks up to a fresh breeze, making it a bit more work. Still clean, but not as perfect as the weekend.
After that, things drop off. The second week has a few flickers—Thursday the 6th morning has a clean 4 ft SW swell with a 16-second period, but only 561 energy (moderate) and a cross-off breeze. Then Saturday the 8th morning and afternoon finally see a return of offshore winds with 4 ft SW swell at 16 seconds, giving you clean, fun waves for all levels. The energy is still moderate (around 603-616), so it's a nice little rebound for the weekend warriors.
The rest of the outlook is pretty quiet, with a lot of onshore wind and small surf. The 9th of August has a tiny 2 ft swell with a very long 23-second period, but a moderate cross-off breeze—probably more of a novelty session than a proper surf.
So, to sum it up: the best waves are on Wednesday the 29th and Thursday the 30th of July for the big stuff, and Saturday the 1st of August afternoon is the absolute standout for clean, long-period groundswell. Don't sleep on that one.
Rusty.
Short Range ForecastMostly dry. Very mild (max 17°C on Mon morning, min 12°C on Sat night). Winds increasing (calm on Sat night, fresh winds from the NNW by Mon morning). | Days 5-7 Weather SummarySome drizzle, heaviest during Tue morning. Very mild (max 15°C on Mon night, min 11°C on Thu morning). Wind will be generally light. | ||||||||||||||||||
Saturday 25 | Sunday 26 | Monday 27 | Tuesday 28 | Wednesday 29 | Thursday 30 | ||||||||||||||
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 14 | SW 13 | SW 13 | SW 12 | SW 12 | SW 12 | SW 12 | SW 14 | WSW 13 | SW 13 | SW 14 | SW 14 | SW 15 | SW 15 | SW 14 | SW 13 | SW 12 | SW 13 | SW 14 |
Wave Graph | |||||||||||||||||||
787 | 488 | 411 | 373 | 293 | 303 | 228 | 93 | 651 | 1083 | 1187 | 1018 | 1441 | 1716 | 1307 | 846 | 619 | 519 | 410 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-on | cross-on | glassy | cross | cross-on | cross-off | cross | on | on | cross-on | cross-on | cross | cross-off | cross-off | cross-off | off | cross | cross-off |
High Tide | 11:20AM0.94m | 00:21AM0.53m | 11:34AM1.07m | 00:05AM0.60m | 11:55AM1.19m | 00:14AM0.69m | 12:17PM1.29m | 00:29AM0.76m | 12:39PM1.36m | 00:47AM0.84m | 1:00PM1.41m | 1:08AM0.91m | |||||||
Low Tide | 7:15PM0.37m | 4:11AM0.45m | 6:49PM0.30m | 4:58AM0.34m | 6:51PM0.22m | 5:30AM0.23m | 7:02PM0.16m | 5:57AM0.13m | 7:16PM0.11m | 6:24AM0.06m | 7:33PM0.07m | ||||||||
— | 7:31 | — | — | 7:31 | — | — | 7:31 | — | — | 7:30 | — | — | 7:30 | — | — | 7:28 | — | — | |
— | — | 5:55 | — | — | 5:57 | — | — | 5:58 | — | — | 5:58 | — | — | 5:59 | — | — | 6:00 | — | |
mm | — | — | — | — | — | — | — | — | — | — | 1 | — | — | — | — | — | — | — | — |
Temp °C | 13 | 13 | 13 | 13 | 14 | 16 | 16 | 17 | 16 | 15 | 14 | 13 | 13 | 14 | 13 | 13 | 13 | 13 | 12 |
Feels °C | 10 | 10 | 9 | 11 | 10 | 12 | 14 | 8 | 9 | 12 | 10 | 8 | 9 | 10 | 9 | 9 | 9 | 9 | 8 |
Swell 1 Height (m) Direction Period (s) | SW 14 | SW 13 | SW 13 | SW 12 | SW 12 | SW 12 | SW 12 | SW 11 | S 10 | SW 13 | SW 14 | SW 14 | SW 15 | SW 15 | SW 14 | SW 13 | SW 12 | SW 13 | SW 14 |
787 | 488 | 411 | 373 | 293 | 303 | 228 | 75 | 2 | 1083 | 1187 | 1018 | 1441 | 1716 | 1307 | 846 | 619 | 519 | 410 | |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | SW 16 | SW 14 | — | — | — | — | — | — | — | — | — | SW 24 | SW 22 |
— | — | — | — | — | — | 10 | 93 | — | — | — | — | — | — | — | — | — | 22 | 73 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | — | — | SW 13 | — | — | WNW 3 | NW 3 | WNW 5 | WSW 13 | SW 13 | SSW 14 | SSW 14 | — | — | — | — | — | — | SE 3 |
— | — | 42 | — | — | 1 | 4 | 80 | 651 | 61 | 82 | 79 | — | — | — | — | — | — | 3 | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 1 | 552 | 648 | 0 | 0 | 401 | 178 | 649 | 978 | 1457 | 1229 | 941 | 491 | 0 | 0 | 132 | 0 | 1 | 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.










