Surf Forecasts:
Castles surf forecast from 19 Jul 2026:
- Best quality surf: Friday 24 Jul, 6AM (local time) - 5.5ft (1.7m), 15s period, SW swell with cross-offshore winds.
- Most powerful swell: Thursday 23 Jul, 12AM (local time) - 8ft (2.4m), 14s period, SSW swell with 2,313 kJ wave energy.
- Next surfable swell (1★+): Sunday 19 Jul, 9PM (local time) - 3.5ft (1.0m), 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 Sunday (Jul 19) at 9PM. The primary swell is predicted to be 1.0m and 16s period with a secondary swell of 0.2m and 10s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Castles in the next 16 days are 2.4m 14s and forecast to arrive on Thursday (Jul 23) at 12AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 3s period and expected on Monday (Jul 20) at 6AM.
| Wave Type | Time (ACST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9PM (Sun 19th Jul) | 3.5ft (1.0m) 16s |
| Best Surf | 6AM (Fri 24th Jul) | 5.5ft (1.7m) 15s |
| Most Powerful | 12AM (Thu 23rd Jul) | 8ft (2.4m) 14s |
Table - best surf conditions forecast for Castles over the next 16 days.
The Lowdown
Alright, this is Rusty, and I’m looking at the next few weeks for Castles. Let’s break it down.
We’ve got a real slow start, but it’s not all bad news. The water is sitting at 61°, which is about average for this time of year, so nothing weird there.
The first real glimmer of hope comes on Monday, July 20th. The afternoon session is the one to circle. The swell is a clean 4ft from the SW, with a long 15-second period, meaning real groundswell energy. The wind goes glassy – that’s a big deal. It’ll be clean, smooth, and that long period will wrap in nicely. The combined energy is moderate (623), so there’s some push. This is the standout of the first week.
After that, things get messy. Tuesday through Thursday of that week see building swell, but the wind is a problem – mostly cross to cross-onshore, and by Wednesday the 22nd it’s straight-up choppy and poor. The swell gets up to 7ft on Thursday the 23rd, but it’s cross-shore and lumpy. That’s expert-only territory at that size, but the lack of clean wind kills it.
The next real standout is a long way off, but worth the wait. On Sunday, July 26th, we get a morning window with a 4ft SW swell, 12-second period, and light cross-offshore wind from the north. The combined energy is light (314), but it’ll be clean. Not a ripper, but a nice paddle.
The absolute best session of the entire 16-day window is on Sunday, August 2nd. Morning is the call. We’ve got a 3ft SW swell with a 19-second period – that’s very long, deep groundswell. The wind is light offshore from the NE. The combined energy is moderate (680) and the forecast is clean. This is the kind of day where you get long, lined-up waves with no wind bump. For a reef break like Castles, that’s gold. Just be aware that because it’s so long-period, the sets will have long gaps, but the paddle out will be easy.
A couple of days later, on Monday, August 3rd, the morning is also a solid option with a 4ft SW swell, 16-second period, and gentle offshore wind. Clean again.
It’s a quiet start, then a messy middle, but the very end of the run has two proper gems. Don’t sleep on August 2nd.
Rusty.
Short Range ForecastMostly dry. Very mild (max 19°C on Sun afternoon, min 14°C on Wed morning). Wind will be generally light. | Days 5-7 Weather SummaryLight rain (total 2mm), mostly falling on Wed afternoon. Very mild (max 14°C on Wed afternoon, min 12°C on Wed night). Wind will be generally light. | |||||||||||||||||||
Sun 19 | Monday 20 | Tuesday 21 | Wednesday 22 | Thursday 23 | Friday 24 | Saturday 25 | ||||||||||||||
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 18 | SW 16 | SW 15 | SW 15 | SW 14 | SW 13 | SW 13 | SW 12 | SW 14 | SW 13 | SSW 14 | SW 14 | SW 16 | SW 15 | SW 15 | SW 14 | SW 14 | SW 13 | SW 13 | SW 13 |
Wave Graph  | ||||||||||||||||||||
 kJ | 370 | 587 | 566 | 623 | 595 | 431 | 357 | 240 | 123 | 711 | 2313 | 1704 | 1856 | 1480 | 1229 | 992 | 612 | 552 | 494 | 511 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross-off | glassy | cross-off | cross | cross-on | on | cross-on | cross-on | cross | cross | cross | cross | cross | cross-on | cross-on | on | on | cross-on |
High Tide | 2:41AM0.91m | 2:26PM1.04m | 3:13AM0.90m | 2:35PM0.96m | 3:48AM0.86m | 2:35PM0.87m | 4:33AM0.79m | 2:02PM0.79m | 11:56AM0.81m | 11:20AM0.94m | 00:21AM0.53m | |||||||||
Low Tide | 8:40PM0.17m | 8:22AM0.31m | 8:56PM0.16m | 8:45AM0.42m | 9:13PM0.18m | 9:06AM0.53m | 9:29PM0.23m | 9:12AM0.65m | 9:34PM0.31m | 8:49PM0.38m | 7:15PM0.37m | |||||||||
 |  |  | |  | |  |  | |  |  | | | | | | | |  | | |
 | — | — | 7:35 | — | — | 7:33 | — | — | 7:33 | — | — | 7:33 | — | — | 7:33 | — | — | 7:31 | — | — |
 | 5:52 | — | — | 5:52 | — | — | 5:53 | — | — | 5:54 | — | — | 5:54 | — | — | 5:55 | — | — | 5:55 | — |
mm | — | — | — | — | — | — | — | — | — | 1 | 1 | — | — | — | — | — | — | — | 1 | 2 |
Temp °C | 19 | 18 | 17 | 19 | 18 | 17 | 19 | 18 | 15 | 14 | 13 | 13 | 13 | 13 | 12 | 12 | 13 | 13 | 13 | 14 |
Feels °C | 13 | 13 | 13 | 17 | 14 | 13 | 17 | 16 | 12 | 8 | 8 | 8 | 7 | 7 | 8 | 8 | 9 | 9 | 9 | 13 |
Swell 1 Height (m) Direction Period (s) | SW 18 | SW 16 | SW 15 | SW 15 | SW 14 | SW 13 | SW 13 | SW 12 | SW 11 | — | SSW 14 | SW 14 | SW 16 | SW 15 | SW 15 | SW 14 | SW 14 | SW 13 | SW 13 | SW 13 |
| kJ | 370 | 587 | 566 | 623 | 595 | 431 | 357 | 240 | 94 | — | 2313 | 1704 | 1856 | 1480 | 1229 | 992 | 612 | 552 | 494 | 511 |
Swell 2 Height (m) Direction Period (s) | SW 13 | S 10 | S 10 | — | — | S 9 | — | — | SW 14 | — | — | — | — | — | — | — | — | — | — | — |
| kJ | 82 | 8 | 2 | — | — | 2 | — | — | 123 | — | — | — | — | — | — | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | NW 4 | — | NNW 4 | — | — | — | — | — | SW 4 | SW 13 | SW 14 | SSW 14 | SSW 16 | — | — | SW 14 | — | — | — | — |
| kJ | 3 | — | 7 | — | — | — | — | — | 8 | 711 | 1368 | 81 | 95 | — | — | 54 | — | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 178 | 1 | 178 | 0 | 0 | 0 | 178 | 402 | 1227 | 1236 | 1219 | 941 | 941 | 132 | 1 | 1 | 1 | 1035 | 940 | 1 |
Best forecast wave conditions in Nullarbor | ||||||||||||||||||||
Best forecast wave conditions in Australia | ||||||||||||||||||||
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The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Castles surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
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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