Castles Surf Break

Lat Long: 32.09° S 132.98° E

Castles Surf Forecast and Surf Report

Issued: 2 pm 17 Jul 2026 (local time)

Forecast update in  hr  min

Today's Castles sea temperature is
16.0° C
0.3° 

Castles surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


Castles surf forecast from 17 Jul 2026:

  • Best quality surf: Thursday 23 Jul, 3AM (local time) - 6ft (1.8m), 15s period, SW swell with cross-offshore winds.
  • Most powerful swell: Friday 24 Jul, 12AM (local time) - 5.5ft (1.7m), 16s period, SW swell with 1,464 kJ wave energy.
  • Next surfable swell (1★+): Saturday 18 Jul, 6PM (local time) - 2.5ft (0.7m), 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 Saturday (Jul 18) at 6PM. The primary swell is predicted to be 0.7m and 13s period with a secondary swell of 0.2m and 3s. 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 1.7m 16s and forecast to arrive on Friday (Jul 24) at 12AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 3s period and expected on Sunday (Jul 19) at 6AM.

Wave TypeTime (ACST) & Date Wave Height & Period
Next good surf (1 star+) 6PM (Sat 18th Jul)2.5ft (0.7m) 13s
Best Surf 3AM (Thu 23rd Jul)6ft (1.8m) 15s
Most Powerful12AM (Fri 24th Jul)5.5ft (1.7m) 16s

Table - best surf conditions forecast for Castles over the next 16 days.


The Lowdown

Right then, let’s have a look at what’s heading our way. This is a classic case of a spot that needs a very specific window to come alive, and honestly, for the first little while, it’s a bit of a waiting game. We’ve got a solid 16-day window ahead, but don’t get your hopes up for the first week – there’s a real dry spell until things start to look more interesting.

Alright, let’s get into it. The only break on the cards here is Castles (reef), which is a consistent spot that’s exposed to the WSW swell. The water temperature is sitting at 61°, which is pretty much bang on average for this time of year, so no surprises there.

The first few days are a bit of a struggle. Friday the 17th and Saturday the 18th offer small, clean surf with a 4 ft and 3 ft SW swell, but it’s a cross-off wind and the energy is weak (538 and 215 respectively). The forecast is calling it marginal. Sunday the 19th is a write-off with poor conditions. Monday the 20th has a bit more promise in the afternoon – a 4 ft SW swell with glassy conditions (467 energy) – that’s a nice, clean window for a sneaky session, but it’s still small. Tuesday the 21st morning is similar, clean but small (437 energy). Wednesday the 22nd morning is glassy again with 3 ft, but it’s tiny.

Then we hit Thursday the 23rd. This is the first real standout. The morning brings a clean 6 ft SW swell from a 14-second period (1327 energy). That’s a solid, moderate energy pulse. The wind is a light cross-off, so it’ll be clean. This is excellent for experienced surfers, as it’s over 5 ft, so it’s getting a bit too much for beginners. The 14-second period means it’s a proper groundswell, which will wrap around the reef nicely. The afternoon gets messy with a cross-on wind, so get in early.

The following week is a mixed bag. Friday the 24th is still fun with a 5 ft SW swell (1169 energy), but the wind is light cross-on, so it’ll have a bit of a texture. Saturday the 25th drops off, and by Sunday the 26th it’s back to poor conditions. Monday the 27th has a very long period 19-second swell, but it’s tiny at 2 ft and cross-on, so it’s a washout.

Now, for the second week, the real potential shows up, but it’s a long way out. Tuesday the 28th of July sees a big jump in energy. A 6 ft SW swell with a 16-second period delivers a very strong 1420 energy. However, the wind is a fresh cross-shore, making it lumpy. The morning is a better bet than the afternoon, which is a total write-off. The 30th of July is looking like the best of the longer-range outlook. The morning is clean with a fresh offshore wind (ENE) and a 4 ft SW swell (596 energy), but the afternoon is the real gem. A 4 ft SW swell, a 13-second period, and a moderate offshore wind (NE) (759 energy) – that’s clean, lined-up surf. It’s not huge, but the quality should be there. This is a promising session, but keep in mind it’s over a week away, so the forecast is a bit less certain.

So, the best on offer is Thursday the 23rd of July morning for the bigger, punchier swell, and then the afternoon of Thursday the 30th of July for a cleaner, more manageable session. Anything before that is just a tease.

Rusty.

Short Range Forecast

Mostly dry. Warm (max 20°C on Sun afternoon, min 13°C on Sat morning). Wind will be generally light.

Days 5-7 Weather Summary

Some drizzle, heaviest during Wed night. Very mild (max 19°C on Mon afternoon, min 13°C on Thu morning). Wind will be generally light.

Fri
17
Saturday
18
Sunday
19
Monday
20
Tuesday
21
Wednesday
22
Thursday
23
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
2
1
1
1
0
0
0
2
2
2
3
2
0
2
2
0
2
4
1
2
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.1
SW
16
1
SW
14
0.8
SW
13
0.8
SW
13
0.6
SW
13
0.4
SW
19
0.8
SW
18
1.1
SW
16
1.1
SW
15
1.1
SW
14
1.2
SW
14
1.1
SW
13
1.1
SW
13
1
SW
12
0.8
SW
11
0.8
SW
14
1.3
SW
16
1.8
SW
14
1.7
SW
14
1.7
SW
16
Wave Graph
Metric surfscale
Energy kJ
532
412
215
208
132
133
370
653
566
466
573
437
363
281
150
269
763
1273
1123
1464
Wind (km/h)
20
N
15
NNE
20
N
20
N
20
NNE
25
N
20
NNW
20
NNE
20
N
5
W
15
NNE
15
N
15
SW
5
ENE
5
S
15
SSW
15
SE
10
SE
20
S
10
SSW
Wind State
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross
cross-off
cross-off
glassy
cross-off
cross-off
cross-on
glassy
glassy
cross-on
cross-off
cross-off
cross-on
cross-on
High Tide
1:49AM0.83m
2:05PM1.17m
2:13AM0.89m
2:16PM1.10m
2:41AM0.91m
2:26PM1.04m
3:13AM0.90m
2:35PM0.96m
3:48AM0.86m
2:35PM0.87m
4:33AM0.79m
2:02PM0.79m
Low Tide
8:21PM0.24m
7:34AM0.15m
8:28PM0.21m
7:58AM0.22m
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
clear
clear
clear
clear
clear
clear
clear
part cloud
cloud
cloud
cloud
cloud
part cloud
part cloud
clear
clear
rain showers
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:35
7:35
7:35
7:33
7:33
7:33
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:52
5:52
5:52
5:52
5:53
5:54
5:54
 mm
1
Temp °C
18
17
16
19
18
17
20
19
17
19
18
17
18
16
16
15
14
14
14
13
Feels °C
12
11
10
13
13
11
16
14
13
17
15
14
14
13
14
12
11
11
11
10
  • Map Icons:
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  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
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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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