Castles Surf Break

Lat Long: 32.09° S 132.98° E

Castles Surf Forecast and Surf Report

Issued: 8 am 10 Aug 2026 (local time)

Forecast update in  hr  min

Today's Castles sea temperature is
15.4° 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 10 Aug 2026:

  • Best quality surf: Friday 14 Aug, 9AM (local time) - 7.5ft (2.3m), 17s period, SW swell with cross-offshore winds.
  • Most powerful swell: Tuesday 11 Aug, 6PM (local time) - 10ft (3.0m), 17s period, SW swell with 5,018 kJ wave energy.
  • Next surfable swell (1★+): Thursday 13 Aug, 9PM (local time) - 6ft (1.9m), 15s 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 Thursday (Aug 13) at 9PM. The primary swell is predicted to be 1.9m and 15s period. 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 3.0m 17s and forecast to arrive on Tuesday (Aug 11) at 6PM. 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 4s period and expected on Monday (Aug 17) at 12AM.

Wave TypeTime (ACST) & Date Wave Height & Period
Next good surf (1 star+) 9PM (Thu 13th Aug)6ft (1.9m) 15s
Best Surf 9AM (Fri 14th Aug)7.5ft (2.3m) 17s
Most Powerful 6PM (Tue 11th Aug)10ft (3.0m) 17s

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


The Lowdown

Right, let’s have a look at what Castles is cooking up over the next couple weeks. It’s a reef setup that’s all about a solid SW groundswell, but the wind’s gonna be a proper pain in the arse before it clears up.

It all kicks off with a big wall of energy, but the wind is totally against us. Monday the 10th brings a long-period SW swell at 8ft with a 17-second interval. That’s some serious grunt (3882 in the energy department) but with a WSW wind blowing straight on at 15 mph, the surface is going to be a messy, blown-out disaster.

Tuesday the 11th is even worse for a surf. A screaming 25 mph cross-shore NW wind tears the 4ft swell to pieces in the morning. The afternoon jumps up to 8ft (5163 combined energy) but the wind cranks to 28 mph from the west onshore. Awful stuff. If you like kiting, this might look fun, but paddling is a no-go.

Wednesday the 12th keeps the theme going. 19 mph onshore SW winds, a solid 8 to 10ft SW swell. The energy peaks at 8026 in the afternoon, but it’s just unsurfable.

We finally get a break on Thursday morning the 13th. The swell drops to 7ft, still a nice long 16-second SW groundswell, and the wind eases to just 3 mph from the south. It’s a light cross-shore, not glassy, but the cleanest we’ve seen. The water is about 60°, totally normal for this time of year.

Now, circle Friday the 14th. That’s your day. A clean 8ft SW swell with a 17-second interval and a light ESE cross-offshore breeze at about 6 mph. The wave report calls it excellent for experienced surfers. The reef will really handle that long period, giving you proper shaped lines. Crowds are possible, so go early.

The weekend (Saturday 15th) is still nice. The swell drops to 6ft, but the ESE cross-off stays clean. It’s a fun, smaller day. Sunday the 16th gets down to 5ft, still tidy.

By Tuesday the 18th, we get another gem. Glassy conditions with a 3 mph offshore NNE wind, and a clean 4ft swell with a super long 19-second period. For a reef, that’s dreamy, long, drawn-out lines. It’s small, but it’ll be perfect.

The next week starts to get mixed up. A strong 19 mph N cross-off wind on Wednesday the 19th makes the 4ft swell feel lumpy and weak.

Things improve again on Friday the 21st of August. A 6ft SW swell arrives with a clean cross-off NE breeze. The afternoon session that day is called excellent for experienced surfers. That’s a solid call for that second week.

From Saturday the 22nd through Monday the 24th, it turns nasty again. Strong onshore and cross-onshore winds, big lumps reaching 10ft again, but all lumpy and choppy. Don’t bother.

The very last day, Tuesday the 25th, has a little cleaner 7ft S swell with a NNE wind, but the period drops.

So, the takeaway: Friday the 14th is the clear winner. The clean cross-off, the solid 8ft, 17-second SW groundswell… that’s the one to lock in. Tuesday the 18th is your small, glassy backup, and the afternoon of Friday the 21st is a promising but less certain option for the second week.

Forget the first few days and that weekend around the 22nd. That Friday is the real deal.

Rusty

Short Range Forecast

Light rain (total 8mm), mostly falling on Tue afternoon. Very mild (max 18°C on Tue morning, min 12°C on Mon night). Winds decreasing (strong winds from the SW on Tue afternoon, light winds from the S by Wed night).

Days 4-6 Weather Summary

Mostly dry. Very mild (max 15°C on Thu morning, min 14°C on Thu morning). Wind will be generally light.

Monday
10
Tuesday
11
Wednesday
12
Thursday
13
Friday
14
Saturday
15
Sunday
16
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
0
1
2
0
0
0
0
0
2
3
2
4
5
3
4
3
3
3
2
2
2
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
2.5
SW
17
2.2
SW
16
1.7
SW
16
1.3
SW
14
2.4
WSW
18
3
SW
17
2.5
SW
17
3
SW
16
2.1
SW
16
2.2
SW
16
2.1
SW
15
1.9
SW
15
2.3
SW
17
2.2
SW
17
1.8
SW
16
1.7
SW
16
1.7
SW
16
1.6
SW
15
1.4
SW
14
1.3
SW
14
1
SW
14
Wave Graph
Metric surfscale
Energy kJ
3882
2475
1384
668
3365
4438
3791
4941
2203
2354
1907
1589
3051
2662
1675
1392
1374
1025
802
632
350
Wind (km/h)
25
WSW
20
W
25
N
35
NNW
45
W
40
SW
30
SW
30
SW
15
SW
5
S
10
SSW
5
SE
5
ESE
15
SSE
10
ESE
20
ESE
20
ESE
20
ESE
20
E
20
ESE
15
E
Wind State
on
on
cross-off
cross
on
on
on
on
on
cross
cross-on
cross-off
cross-off
cross
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
High Tide
12:03PM1.28m
00:48AM0.63m
12:27PM1.36m
00:49AM0.71m
12:48PM1.38m
00:57AM0.80m
1:06PM1.36m
1:08AM0.91m
1:19PM1.30m
1:22AM1.00m
1:29PM1.24m
1:39AM1.08m
1:39PM1.18m
1:58AM1.12m
Low Tide
7:16PM0.11m
5:37AM0.27m
7:23PM0.11m
6:04AM0.16m
7:30PM0.12m
6:29AM0.08m
7:34PM0.13m
6:52AM0.05m
7:37PM0.11m
7:13AM0.06m
7:42PM0.07m
7:34AM0.10m
7:51PM0.03m
cloud
cloud
part cloud
clear
light rain
rain showers
clear
rain showers
clear
clear
cloud
cloud
cloud
cloud
cloud
cloud
cloud
cloud
cloud
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:20
7:18
7:18
7:16
7:16
7:15
7:13
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:07
6:07
6:07
6:08
6:08
6:09
6:09
 mm
4
3
1
Temp °C
14
14
13
18
16
13
14
15
14
15
15
15
14
15
15
15
15
14
14
15
14
Feels °C
9
9
7
9
7
4
8
11
11
13
12
13
12
12
11
10
10
10
9
10
9
  • Map Icons:
  • Break
  • 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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