Surf Forecasts:
Castles surf forecast from 30 Jul 2026:
- Best quality surf: Friday 31 Jul, 3PM (local time) - 3ft (0.9m), 14s period, SW swell with cross-offshore winds.
- Most powerful swell: Sunday 2 Aug, 9PM (local time) - 8ft (2.5m), 16s period, SW swell with 2,925 kJ wave energy.
- Next surfable swell (1★+): Friday 31 Jul, 12AM (local time) - 3.5ft (1.1m), 13s 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 (Jul 31) at 12AM. The primary swell is predicted to be 1.1m and 13s period with a secondary swell of 0.1m and 22s. 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 Sunday (Aug 02) at 9PM. Winds are predicted to be cross-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 Saturday (Aug 01) at 9AM.
| Wave Type | Time (ACST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12AM (Fri 31st Jul) | 3.5ft (1.1m) 13s |
| Best Surf | 3PM (Fri 31st Jul) | 3ft (0.9m) 14s |
| Most Powerful | 9PM (Sun 2nd Aug) | 8ft (2.5m) 16s |
Table - best surf conditions forecast for Castles over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let's chew the fat on what's coming for Castles.
First things first, we're in for a bit of a dry spell. The first real chance of a wave doesn't show up until Thursday afternoon, the 30th of July. The water is 59.9°F, which is about average for this time of year, nothing to write home about.
Thursday afternoon will see a small 4.3ft SW groundswell, but we've got a cross-shore breeze, so it's not going to be glassy. It's a bit of a "maybe" session.
Now, the real standout is shaping up to be Friday the 31st of July. The afternoon is the call. We've got a solid 3ft of SW groundswell, but the wind is what's got me pumped. It's a clean offshore, light breeze from the NNE. That's a sweet combo for a reef break like Castles. The energy is moderate (604), and the period is a nice 14 seconds, giving it some real oomph. This is the pick of the early window.
Saturday the 1st of August is a bit of a bust. The morning has a 3.6ft SW groundswell, but the wind is howling at 22 mph from the north, making it too choppy. The afternoon picks up a bit to 4.6ft, but the wind is still messy.
The second week starts to get a little more interesting, but it's tricky. Sunday the 9th of August is a total washout with gale-force winds, you don't want to be out there. But look at Thursday the 13th of August. The morning is showing a massive 10ft SW groundswell with a very long period of 21 seconds, and the wind is a clean offshore from the north. The energy is through the roof (7188). This is a big, powerful swell. For experts only, and it's a long way out, so keep an eye on it, but it's got promise.
Overall, the best bet is Friday afternoon, the 31st of July. Get on it.
Short Range ForecastMostly dry. Very mild (max 19°C on Sat afternoon, min 12°C on Thu night). Winds increasing (light winds from the SSE on Thu afternoon, fresh winds from the N by Sat morning). | Days 5-7 Weather SummaryMostly dry. Very mild (max 19°C on Wed morning, min 10°C on Mon night). Winds decreasing (fresh winds from the SW on Sun afternoon, light winds from the NNW by Tue afternoon). | |||||||||||||||||||
Thu 30 | Friday 31 | Saturday 1 | Sunday 2 | Monday 3 | Tuesday 4 | Wednesday 5 | ||||||||||||||
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 13 | SW 13 | SW 13 | SW 14 | SW 18 | SW 17 | SW 17 | SW 16 | WSW 15 | SW 15 | SW 16 | SW 14 | SW 14 | SW 13 | SW 12 | SW 15 | SW 15 | SW 19 | SW 17 | SW 16 |
Wave Graph  | ||||||||||||||||||||
 kJ | 581 | 431 | 299 | 327 | 307 | 760 | 1081 | 1029 | 1069 | 1271 | 1856 | 1179 | 990 | 710 | 324 | 505 | 355 | 1111 | 1074 | 955 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | off | cross-off | cross-off | cross-off | cross-off | cross | cross-off | on | on | cross-on | cross-on | cross-on | off | cross-off | cross | off | cross-off | on | cross-on |
High Tide | 1:08AM0.91m | 1:22PM1.42m | 1:30AM0.97m | 1:44PM1.40m | 1:55AM1.02m | 2:06PM1.33m | 2:21AM1.04m | 2:27PM1.22m | 2:48AM1.04m | 2:45PM1.07m | 3:17AM1.01m | 2:52PM0.90m | ||||||||
Low Tide | 7:33PM0.07m | 6:50AM0.01m | 7:50PM0.04m | 7:16AM-0.00m | 8:08PM0.03m | 7:44AM0.02m | 8:27PM0.04m | 8:13AM0.09m | 8:45PM0.08m | 8:43AM0.19m | 9:00PM0.13m | 9:12AM0.35m | 9:08PM0.19m | |||||||
 |  |  | | | | | | | |  | | | | | | | | | | |
 | — | — | 7:28 | — | — | 7:26 | — | — | 7:26 | — | — | 7:26 | — | — | 7:24 | — | — | 7:24 | — | — |
 | 6:00 | — | — | 6:00 | — | — | 6:00 | — | — | 6:00 | — | — | 6:01 | — | — | 6:02 | — | — | 6:02 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 14 | 13 | 15 | 17 | 16 | 16 | 19 | 18 | 15 | 15 | 15 | 14 | 14 | 13 | 15 | 17 | 16 | 19 | 18 | 16 |
Feels °C | 10 | 9 | 10 | 12 | 10 | 8 | 13 | 11 | 9 | 8 | 10 | 11 | 10 | 8 | 10 | 14 | 11 | 13 | 13 | 13 |
Swell 1 Height (m) Direction Period (s) | SW 13 | SW 13 | SW 13 | SW 14 | SW 14 | SW 17 | SW 17 | SW 16 | — | — | SW 16 | SW 14 | SW 14 | SW 13 | SW 12 | SW 15 | SW 15 | SW 19 | SW 17 | SW 16 |
| kJ | 581 | 431 | 299 | 327 | 221 | 760 | 1081 | 1029 | — | — | 1856 | 1179 | 990 | 710 | 324 | 505 | 355 | 1111 | 1074 | 955 |
Swell 2 Height (m) Direction Period (s) | — | SW 22 | SW 21 | SW 20 | SW 18 | S 8 | — | — | — | — | — | — | SW 18 | SW 17 | SW 16 | S 10 | SW 20 | S 8 | S 9 | — |
| kJ | — | 19 | 71 | 239 | 307 | 5 | — | — | — | — | — | — | 81 | 12 | 159 | 92 | 264 | 23 | 24 | — |
Swell 3 Height (m) Direction Period (s) | — | — | SW 21 | S 9 | — | — | — | — | — | — | — | — | — | — | — | SW 21 | S 9 | — | — | — |
| kJ | — | — | 110 | 38 | — | — | — | — | — | — | — | — | — | — | — | 116 | 38 | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | NE 2 | — | NE 3 | N 4 | NNW 4 | N 4 | WSW 15 | SW 15 | SW 16 | — | — | — | ENE 3 | N 3 | NE 3 | NNW 3 | SW 17 | WSW 4 |
| kJ | — | — | 1 | — | 3 | 27 | 13 | 18 | 1069 | 1271 | 62 | — | — | — | 7 | 1 | 5 | 3 | 107 | 5 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 1 | 0 | 0 | 0 | 0 | 402 | 506 | 564 | 1035 | 1149 | 940 | 940 | 1 | 0 | 0 | 0 | 0 | 402 | 401 | 401 |
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.
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