Surf Forecasts:
Castles surf forecast from 1 Aug 2026:
- Best quality surf: Thursday 6 Aug, 6PM (local time) - 4.5ft (1.4m), 16s period, SW swell with cross-offshore winds.
- Most powerful swell: Friday 7 Aug, 6AM (local time) - 5.5ft (1.7m), 19s period, SW swell with 2,010 kJ wave energy.
- Next surfable swell (1★+): Tuesday 4 Aug, 12AM (local time) - 5ft (1.5m), 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 Tuesday (Aug 04) at 12AM. The primary swell is predicted to be 1.5m and 13s period with a secondary swell of 0.6m and 17s. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Castles in the next 16 days are 1.7m 19s and forecast to arrive on Friday (Aug 07) 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 Sunday (Aug 02) at 3AM.
| Wave Type | Time (ACST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12AM (Tue 4th Aug) | 5ft (1.5m) 13s |
| Best Surf | 6PM (Thu 6th Aug) | 4.5ft (1.4m) 16s |
| Most Powerful | 6AM (Fri 7th Aug) | 5.5ft (1.7m) 19s |
Table - best surf conditions forecast for Castles over the next 16 days.
The Lowdown
Alright mate, Rusty here, giving you the lowdown in feet and miles.
So, the story for Castles is pretty much the same – lots of average to poor days, but there are a couple of sessions that will be worth the drive. The main issue is the wind, which is going to be a bit of a bully most of the time.
Let's start with Saturday, August 1st. The morning has a clean 4ft SW swell, but it’s a cross-offshore breeze, so not glassy. The wave energy is moderate (866). It’s a bit marginal. The afternoon picks up to 5ft with a cross-shore wind, creating some slight chop, and the energy is moderate (1091). It's okay, but nothing special.
Sunday the 2nd is a total no-go. The wind goes onshore, and it gets choppy and ugly—just don't bother.
Monday the 3rd is rideable but average. The morning sees a 6ft SW swell with a light cross-onshore breeze. The energy is solidly moderate (1273), but the conditions are still iffy. The afternoon is similar with a 6ft swell.
Now, here's the first standout. Tuesday, August 4th. The morning is clean with a nice offshore wind from the NE. The swell drops to 4ft from the SW, but it's a classic groundswell with a long period of 12 seconds, so those waves will have some real shape. The energy is still moderate (505). This is your session for clean, glassy waves.
The next few days (Wednesday 5th through Thursday 6th) are more of the same: small, clean but weak, or messy with cross-shore chop. The water temp is about 60°, which is normal for this time of year.
We then hit a rough patch from Friday, August 7th through Wednesday, August 12th. The swell pumps up, hitting a massive 10ft on the 10th (strong energy of 5766), but the wind is howling onshore or cross-shore, making it a complete mess. That 10ft swell with a 19-second period would be a beast at a good point break, but at Castles with those winds, it will just be a washing machine. Stay out.
Finally, the second window opens on Saturday, August 15th. The morning session looks like a gem. Light offshore wind from the ENE, a solid 4ft SW groundswell, and very clean conditions. The energy is moderate (822), but the wind is perfect. This is your other chance for a classic session.
Sunday the 16th fades away with smaller, weaker waves again.
So, to call it straight: your two best calls are Tuesday morning the 4th for some clean, lined-up waves, and Saturday morning the 15th for more of the same. The rest of the fortnight is mostly blown out or too small. Hit those two mornings and you'll be stoked.
Rusty.
Short Range ForecastMostly dry. Very mild (max 17°C on Sat afternoon, min 10°C on Sat morning). Winds decreasing (fresh winds from the N on Sat morning, light winds from the SW by Sun night). | Days 4-6 Weather SummaryMostly dry. Very mild (max 18°C on Tue afternoon, min 10°C on Tue morning). Winds increasing (light winds from the SW on Wed night, fresh winds from the NNE by Thu night). | ||||||||||||||||||||
Saturday 1 | Sunday 2 | Monday 3 | Tuesday 4 | Wednesday 5 | Thursday 6 | Friday 7 | |||||||||||||||
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 17 | SW 17 | SW 16 | SW 15 | SW 15 | SW 16 | SW 14 | SW 14 | SW 13 | SW 12 | SW 15 | SW 15 | SW 19 | SW 18 | SW 16 | SW 16 | SW 16 | SW 16 | SW 18 | SW 17 | SW 16 |
Wave Graph  | |||||||||||||||||||||
 kJ | 861 | 1081 | 1029 | 1033 | 1048 | 1856 | 1273 | 1075 | 710 | 314 | 262 | 331 | 361 | 694 | 667 | 546 | 774 | 1314 | 1946 | 1415 | 844 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross | cross-off | cross-on | on | on | cross-on | cross | off | off | cross-off | cross-off | cross-off | on | cross-on | cross | cross | off | cross-off | cross | cross-on |
High Tide | 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 | 3:49AM0.95m | 2:24PM0.75m | 4:31AM0.85m | |||||||||
Low Tide | 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 | 9:37AM0.53m | 8:59PM0.25m | 9:18AM0.74m | 8:14PM0.26m | ||||||||
 | |  |  | |  | | | | | | | | | | | | | | | | |
 | 7:26 | — | — | 7:26 | — | — | 7:26 | — | — | 7:24 | — | — | 7:24 | — | — | 7:22 | — | — | 7:22 | — | — |
 | — | 6:00 | — | — | 6:00 | — | — | 6:01 | — | — | 6:02 | — | — | 6:02 | — | — | 6:04 | — | — | 6:05 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 14 | 17 | 17 | 15 | 15 | 14 | 14 | 14 | 13 | 15 | 18 | 17 | 16 | 17 | 15 | 16 | 17 | 16 | 19 | 21 | 18 |
Feels °C | 6 | 11 | 11 | 10 | 10 | 10 | 11 | 10 | 9 | 10 | 14 | 12 | 9 | 13 | 15 | 15 | 15 | 13 | 10 | 11 | 12 |
Swell 1 Height (m) Direction Period (s) | SW 17 | SW 17 | SW 16 | — | — | SW 16 | SW 14 | SW 14 | SW 13 | SW 12 | SW 15 | SW 15 | SW 19 | SW 18 | SW 16 | SW 16 | SW 16 | SW 16 | SW 18 | SW 17 | SW 16 |
| kJ | 861 | 1081 | 1029 | — | — | 1856 | 1273 | 1075 | 710 | 314 | 262 | 318 | 361 | 694 | 667 | 546 | 774 | 1314 | 1946 | 1415 | 844 |
Swell 2 Height (m) Direction Period (s) | S 8 | — | — | — | — | — | — | SW 18 | SW 17 | SW 15 | SW 10 | SW 21 | SW 14 | SW 9 | S 8 | SW 21 | S 7 | — | — | — | — |
| kJ | 5 | — | — | — | — | — | — | 81 | 181 | 191 | 106 | 150 | 130 | 20 | 12 | 69 | 1 | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | SW 20 | SSW 9 | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | 331 | 27 | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | NNW 4 | NW 4 | N 4 | SW 15 | SW 15 | SW 16 | — | SW 14 | — | ENE 3 | — | ENE 3 | N 4 | — | — | E 8 | — | — | NNE 3 | — | N 4 |
| kJ | 20 | 10 | 14 | 1033 | 1048 | 62 | — | 50 | — | 4 | — | 3 | 10 | — | — | 1 | — | — | 3 | — | 9 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 402 | 501 | 564 | 1035 | 1149 | 940 | 1 | 1056 | 0 | 0 | 0 | 0 | 1 | 361 | 132 | 1 | 1 | 0 | 564 | 564 | 653 |
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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