Castles Surf Break

Lat Long: 32.09° S 132.98° E

Castles Surf Forecast and Surf Report

Issued: 8 pm 25 Aug 2026 (local time)

Forecast update in  hr  min

Today's Castles sea temperature is
15.6°C
0.0° 

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


Castles surf forecast from 25 Aug 2026:

  • Best quality surf: Thursday 27 Aug, 6PM (local time) - 5ft (1.6m), 18s period, SW swell with offshore winds.
  • Most powerful swell: Monday 31 Aug, 3AM (local time) - 5ft (1.6m), 19s period, SW swell with 1,798 kJ wave energy.
  • Next surfable swell (1★+): Wednesday 26 Aug, 3AM (local time) - 4.5ft (1.3m), 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 Wednesday (Aug 26) at 3AM. The primary swell is predicted to be 1.3m and 13s 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 1.6m 19s and forecast to arrive on Monday (Aug 31) at 3AM. 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 Tuesday (Sep 01) at 9AM.

Wave TypeTime (ACST) & Date Wave Height & Period
Next good surf (1 star+) 3AM (Wed 26th Aug)4.5ft (1.3m) 13s
Best Surf 6PM (Thu 27th Aug)5ft (1.6m) 18s
Most Powerful 3AM (Mon 31st Aug)5ft (1.6m) 19s

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


The Lowdown

G’day, Rusty here.

Alright, let’s have a look at what’s coming up for Castles. This is a consistent reef break that’s exposed to a good south-west swell direction, and it’s a beginner-friendly wave. The water temp is sitting about average for the time of year, nothing too wild. There’s a bit of a slow start, but the second half of the run really cooks.

We kick off Wednesday the 26th with a bit of clean, small surf – around 3.6 ft from the SW, with a 13-second period on the morning. The wind is a light cross-off NNE breeze, so it’s not too bad, but the wave energy is moderate (431). The afternoon cleans right up with a glassy NE offshore at 3 mph, holding 3.0 ft and 12-second swell – a nice little session for a beginner to get among it. The energy drops to 350, but it’s clean.

Thursday the 27th is a bit of a mixed bag. Morning sees a fresh 19 mph NNE cross-off wind, and the swell picks up to 3.6 ft with a 14-second period, moderate energy (664). The afternoon is weird – the swell is only 3.0 ft, but the period blows out to 19 seconds, and the energy jumps to 1157. That long period means the waves will be really well-shaped and powerful for the size, but with a cross-off NNE breeze, it’ll be a bit of a handful, especially for a beginner.

Friday the 28th is a standout. The morning has 4.9 ft SW swell with a 16-second period, moderate energy (1144), and a cross-off NNE breeze. That’s excellent for experienced surfers. But the afternoon is the real gem – glassy as can be, with a dead calm SE wind at 0 mph, 4.6 ft SW swell, same long 16-second period, and energy at 989. If you can get out for that afternoon window, it’ll be incredibly clean and well-shaped. The 4.9 ft morning swell is a bit overhead for absolute beginners, but it’s not too big for a confident intermediate.

Saturday the 29th is a bit of a letdown after Friday. The morning has 3.0 ft SW swell, 14-second period, and gentle offshore ENE wind – clean, but small. The energy is only 352. The afternoon is even smaller, 2.6 ft, with a cross-off ESE breeze and energy of 246. Not much to write home about.

Sunday the 30th is similar – the morning has 2.0 ft SW swell, but the period is 19 seconds, so the energy is still 352. It’s clean with a moderate offshore ENE breeze. The afternoon gets a bit more size, 3.6 ft, with a 19-second period and energy of 887, but the wind swings cross-off from the SE. Fun, but not the best of the week.

Monday the 31st sees a bigger swell push through. Morning: 5.2 ft SW, 17-second period, energy of 1437, with a cross-off NNE breeze. That’s a solid size, getting into the experienced-only range. The afternoon holds 4.9 ft with the same period and energy of 1252, still cross-off. It’s a good session for strong surfers.

Tuesday the 1st of September is a dud. Strong cross-shore NNW wind at 25 mph in the morning, and a messy onshore WSW wind in the afternoon. The swell is 3.6 ft to 4.3 ft, but the energy is high (1566 in the afternoon) – the wind just kills it. Not worth it.

Wednesday the 2nd is poor too. Onshore WSW wind all day, with 3.6 ft in the morning and 3.0 ft in the afternoon. The energy is moderate (553 and 485), but the onshore wind makes it ugly.

Thursday the 3rd is a turn for the better. Morning: 4.3 ft SW swell, 15-second period, light cross-off N wind, clean with energy of 753. That’s a very good session.

Now, the real standout is Friday the

Short Range Forecast

Mostly dry. Warm (max 24°C on Thu afternoon, min 11°C on Tue night). Winds decreasing (fresh winds from the N on Thu morning, calm by Fri afternoon).

Days 5-7 Weather Summary

Mostly dry. Warm (max 25°C on Mon afternoon, min 16°C on Sun morning). Wind will be generally light.

Wednesday
26
Thursday
27
Friday
28
Saturday
29
Sunday
30
Monday
31
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
3
1
2
1
1
3
3
4
3
2
2
1
1
2
2
4
3
3
2
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.4
SW
14
1.1
SW
13
0.9
SW
12
0.8
SW
14
1.1
SW
14
0.9
SW
19
1.6
SW
17
1.5
SW
16
1.4
SW
16
1.1
SW
14
0.9
SW
14
0.8
SW
13
0.7
SW
13
0.6
SW
19
1.1
SW
19
1.4
SW
18
1.6
SW
17
1.5
SW
17
1.3
SW
16
Wave Graph
Metric surfscale
Energy kJ
725
431
260
297
466
614
1597
1144
989
536
331
208
160
236
887
1215
1437
1252
813
Wind (km/h)
5
NE
15
NNE
5
NE
15
NE
30
N
20
NNE
20
NNE
15
NNE
0
SE
15
E
15
ENE
20
ESE
20
ESE
20
ENE
15
ESE
15
E
25
NNE
15
N
25
N
Wind State
off
cross-off
off
cross-off
cross-off
cross-off
cross-off
cross-off
glassy
cross-off
off
cross-off
cross-off
off
cross-off
off
cross-off
cross-off
cross-off
High Tide
00:13AM0.78m
12:06PM1.30m
00:22AM0.89m
12:24PM1.38m
00:36AM1.00m
12:43PM1.41m
00:53AM1.09m
1:03PM1.40m
1:13AM1.18m
1:22PM1.34m
1:34AM1.23m
1:40PM1.24m
1:55AM1.26m
Low Tide
5:35AM0.21m
6:40PM0.08m
5:57AM0.09m
6:51PM0.02m
6:21AM0.00m
7:04PM-0.02m
6:45AM-0.05m
7:18PM-0.05m
7:10AM-0.06m
7:32PM-0.05m
7:36AM-0.03m
7:45PM-0.04m
clear
clear
clear
clear
clear
part cloud
cloud
cloud
cloud
clear
part cloud
clear
part cloud
clear
part cloud
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:03
7:01
7:01
6:58
6:58
6:56
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:15
6:16
6:16
6:17
6:19
6:19
6:20
 mm
Temp °C
13
15
19
19
22
24
23
21
22
21
21
22
19
21
22
19
22
25
24
Feels °C
11
12
15
15
16
19
18
18
20
16
16
17
14
17
18
15
17
21
19
  • 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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