Surf Forecasts:
Castles surf forecast from 13 Aug 2026:
- Best quality surf: Friday 14 Aug, 3AM (local time) - 7ft (2.1m), 16s period, SW swell with glassy winds.
- Most powerful swell: Friday 14 Aug, 6AM (local time) - 7ft (2.1m), 17s period, SW swell with 2,442 kJ wave energy.
- Next surfable swell (1★+): Friday 14 Aug, 3AM (local time) - 7ft (2.1m), 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 Friday (Aug 14) at 3AM. The primary swell is predicted to be 2.1m and 16s 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 2.1m 17s and forecast to arrive on Friday (Aug 14) at 6AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 4s period and expected on Tuesday (Aug 18) at 9AM.
| Wave Type | Time (ACST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3AM (Fri 14th Aug) | 7ft (2.1m) 16s |
| Best Surf | 3AM (Fri 14th Aug) | 7ft (2.1m) 16s |
| Most Powerful | 6AM (Fri 14th Aug) | 7ft (2.1m) 17s |
Table - best surf conditions forecast for Castles over the next 16 days.
The Lowdown
Alright, Rusty here. Let's break down what's on the table for the next couple of weeks at our spot, Castles. It's a reef setup, consistent, and picks up swell from the WSW. We've got a bit of a lull to start, but once the swell fills in, there are some proper sessions to look forward to.
The pattern is a classic winter run. We start with a solid swell but some tricky wind conditions, then it cleans up through the weekend. The real standout is a big pulse coming through for Saturday the 22nd and Sunday the 23rd, with excellent conditions for those who can handle it. Later on, the 28th also looks like a beauty.
Alright, Thursday the 13th afternoon rolls in with a 7ft SW swell, but the wind is cross-onshore, and the water temp is sitting at 60°, which is pretty much normal for this time of year. The combined energy is way up there at 2136, so there's plenty of push, but the conditions are just marginal.
Friday the 14th morning is the first real glimmer. Still a 7ft SW swell (energy at 2193), but the wind drops right off to a light cross-offshore. It's clean, and the report says it's excellent for experienced surfers. That's a good window. The afternoon gets messy again as the wind picks up and goes cross-shore.
Saturday the 15th is a bit smaller at 5-6ft but stays clean with a cross-off breeze. The energy drops too, to around 1265. It's a solid option for a fun session, but not the highlight.
Sunday the 16th morning is where we start to see some magic. The swell drops to 4ft, but the wind goes offshore from the ENE at 6 mph. It's clean, and the energy is moderate at 659. It's a good, user-friendly wave.
Monday the 17th is a small day, 3-4ft, but with clean offshore or cross-off winds. It’s more of a longboarder’s window, but still a nice paddle out.
Tuesday the 18th and Wednesday the 19th are a write-off. Strong winds, onshore or cross, with rain on Tuesday. The energy is low and the conditions are poor to marginal. A couple of days to sit out.
Now, Thursday the 20th morning looks promising. The swell bumps back up to 5ft, and it's glassy with an offshore breeze. Energy jumps to 1001. The reports say it's excellent for experienced surfers. That’s a solid morning, but the afternoon gets a bit choppy.
Friday the 21st morning is another clean one with a 5ft SW swell. Light cross-off winds, energy at 1284. It's got that weekend feeling early.
Here’s the first big standout: Saturday the 22nd morning. We get a solid 10ft SW groundswell, with a period of 12 seconds, and it's glassy. The energy is massive at 2507. This is big wave territory. At over 8ft, this is strictly for experts only. The south wind is so light it’s glassy. It’ll be a heavy, long-period swell breaking on a reef, so it’s going to be powerful and require some respect. The morning window is the one to chase.
Sunday the 23rd morning is the next best option. The swell drops to a still-chunky 7ft, but it's clean with a cross-off breeze from the north. Energy is 1692. It's a step down in size from Saturday, but still a proper wave for confident surfers.
The following week gets a bit messy with onshore winds and chunky swell. Monday the 24th is blown out, Tuesday the 25th has a big 8ft swell but onshore winds, and Wednesday the 26th is full on choppy and onshore. Not much to recommend there.
The last proper highlight is Friday the 28th morning. We get another strong pulse: 6ft SW swell, a very long period of 19 seconds, and clean cross-off winds from the NNE. The energy sits at 2503. This is a long-period groundswell, and for a reef like Castles, that’s a winning combo. The waves will have serious shape and power, and the paddling out will be easier between sets. A great way to end the outlook.
So, in short: the first few days are a mixed bag, but the 22nd and 28th mornings are the two sessions you want to circle on your calendar if you've got the skills.
Rusty.
Short Range ForecastSome drizzle, heaviest during Sun afternoon. Very mild (max 17°C on Sat afternoon, min 14°C on Fri morning). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Very mild (max 19°C on Tue afternoon, min 13°C on Mon morning). Winds decreasing (strong winds from the N on Tue morning, light winds from the NW by Tue night). | ||||||||||||||||||
Friday 14 | Saturday 15 | Sunday 16 | Monday 17 | Tuesday 18 | Wednesday 19 | ||||||||||||||
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 16 | SW 16 | SW 16 | SW 16 | SW 16 | SW 15 | SW 14 | SW 14 | SW 14 | SW 16 | SW 16 | SW 19 | SW 18 | SW 17 | SW 16 | SW 15 | SW 15 | SW 15 |
Wave Graph | |||||||||||||||||||
2075 | 2193 | 2166 | 1832 | 1513 | 1374 | 836 | 668 | 659 | 434 | 310 | 603 | 441 | 686 | 487 | 602 | 459 | 429 | 695 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | cross-off | cross | cross-off | cross-off | cross-off | cross-off | off | cross-off | cross-off | off | cross-off | off | cross-off | cross-off | on | cross-on | cross-on | cross-off |
High Tide | 1:08AM0.91m | 1:19PM1.30m | 1:22AM1.00m | 1:29PM1.24m | 1:39AM1.08m | 1:39PM1.18m | 1:58AM1.12m | 1:49PM1.13m | 2:19AM1.13m | 1:59PM1.07m | 2:40AM1.10m | 2:07PM0.99m | 3:00AM1.03m | ||||||
Low Tide | 6:52AM0.05m | 7:37PM0.11m | 7:13AM0.06m | 7:42PM0.07m | 7:34AM0.10m | 7:51PM0.03m | 7:53AM0.16m | 8:02PM0.01m | 8:12AM0.23m | 8:15PM0.01m | 8:30AM0.33m | 8:28PM0.06m | |||||||
— | 7:16 | — | — | 7:15 | — | — | 7:13 | — | — | 7:13 | — | — | 7:11 | — | — | 7:11 | — | — | |
6:08 | — | 6:08 | — | — | 6:09 | — | — | 6:09 | — | — | 6:10 | — | — | 6:12 | — | — | 6:12 | — | |
mm | — | — | — | — | — | — | — | — | 1 | — | — | — | — | — | — | — | — | — | — |
Temp °C | 15 | 15 | 14 | 15 | 15 | 17 | 16 | 16 | 16 | 16 | 17 | 17 | 17 | 18 | 19 | 14 | 14 | 15 | 14 |
Feels °C | 13 | 12 | 10 | 10 | 10 | 13 | 12 | 13 | 11 | 11 | 13 | 13 | 12 | 8 | 13 | 10 | 12 | 13 | 11 |
Swell 1 Height (m) Direction Period (s) | SW 15 | SW 16 | SW 16 | SW 16 | SW 16 | SW 16 | SW 15 | SW 14 | SW 14 | SW 14 | SW 13 | SW 16 | SW 14 | SW 18 | SW 17 | — | SW 15 | SW 15 | SW 15 |
2075 | 2193 | 2166 | 1832 | 1513 | 1374 | 836 | 668 | 659 | 434 | 286 | 603 | 346 | 686 | 487 | — | 459 | 429 | 695 | |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | SW 16 | SW 22 | SW 19 | — | — | — | WSW 6 | WSW 8 | SW 18 |
— | — | — | — | — | — | — | — | — | — | 310 | 163 | 441 | — | — | — | 33 | 80 | 258 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | SW 23 | — | S 11 | — | — | — | — | SW 20 | — |
— | — | — | — | — | — | — | — | — | — | 86 | — | 20 | — | — | — | — | 99 | — | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | E 3 | — | — | — | SE 4 | ENE 2 | — | NE 3 | NNE 4 | NW 4 | SW 16 | — | SW 15 | — |
— | — | — | — | — | 3 | — | — | — | 13 | 1 | — | 2 | 28 | 18 | 602 | — | 78 | — | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 0 | 0 | 154 | 1 | 1 | 0 | 1 | 0 | 1 | 1 | 0 | 0 | 0 | 651 | 564 | 649 | 1 | 1045 | 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.











