Castles Surf Break

Lat Long: 32.09° S 132.98° E

Castles Surf Forecast and Surf Report

Issued: 2 pm 09 Sep 2026 (local time)

Forecast update in  hr  min

Today's Castles sea temperature is
15.8°C
0.2° 

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


Castles surf forecast from 9 Sep 2026:

  • Best quality surf: Wednesday 16 Sep, 3AM (local time) - 5ft (1.6m), 14s period, SW swell with offshore winds.
  • Most powerful swell: Wednesday 9 Sep, 6PM (local time) - 8ft (2.4m), 17s period, SSW swell with 3,260 kJ wave energy.
  • Next surfable swell (1★+): Friday 11 Sep, 3AM (local time) - 4.5ft (1.4m), 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 Friday (Sep 11) at 3AM. The primary swell is predicted to be 1.4m and 15s period with a secondary swell of 0.1m and 24s. The wind is predicted to be offshore as the swell arrives.

The most powerful waves expected at Castles in the next 16 days are 2.4m 17s and forecast to arrive on Wednesday (Sep 09) at 6PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 5s period and expected on Thursday (Sep 10) at 3AM.

Wave TypeTime (ACST) & Date Wave Height & Period
Next good surf (1 star+) 3AM (Fri 11th Sep)4.5ft (1.4m) 15s
Best Surf 3AM (Wed 16th Sep)5ft (1.6m) 14s
Most Powerful 6PM (Wed 9th Sep)8ft (2.4m) 17s

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


The Lowdown

Alright folks, Rusty here. Let’s look at what’s cooking for us over the next couple of weeks.

We’ve got a classic slow burn kicking off. The first few days are a write-off – Wednesday the 9th and Thursday the 10th are plagued by strong onshore and cross-off winds, making for a messy, blown-out scene. We don't really get anything worth paddling out for until Friday morning the 11th. That’s when things start to turn.

The standout window is without a doubt Wednesday the 16th. Castles (reef) will be firing. We’re looking at a solid 6ft of SW groundswell with a very long 16-second period. That kind of period means proper energy and long lulls between sets, perfect for picking off the good ones on a reef setup. The wind is a light breeze, making for clean, lined-up waves. This is the pick of the fortnight. The combined wave energy is strong at 1357. It’s a bit too big and powerful for beginners though; this one’s for the experienced crew.

Leading up to that, Friday the 11th offers a decent warm-up with 4ft SW swell (15-second period) and clean offshore winds. It’s smaller but fun, with moderate energy (707). Keep an eye on Tuesday morning the 15th – we get a bump of 6ft SW swell (14-second period) under cross-off winds, though the energy is moderate (1147) and conditions are cleaner than the weekend drivel.

The weekend of the 12th and 13th is a wipeout. Saturday has tiny 4ft swell with cross-off winds, and Sunday turns downright ugly with cross-on winds making it choppy and poor. Forget it.

After the Wednesday the 16th highlight, the swell drops again. Thursday morning the 17th still has clean 4ft surf, but the afternoon gets shredded by a fresh SSE wind. Then Friday the 18th is small but clean in the morning.

We then hit a big dead zone from the 19th to the 20th – strong winds and tiny swell. You're looking at a solid 3-day gap with no real surf. The next glimmer comes on Monday morning the 21st with a clean 5ft SW swell (13-second period), offering very good conditions under light offshore winds.

Be warned: Tuesday the 22nd kicks up a serious swell – 8ft to 10ft of SW groundswell. This is big, powerful stuff (energy at 4766), but winds are from the south, creating a cross-chop. It’s one for experts only. Wednesday the 23rd is a total washout with a near-gale blowing onshore, making a mess of it.

The water temp is sitting at 61°, which is pretty much normal for this time of year, so no surprises there.

Crowds at Castles are sometimes an issue, so on the good days, expect some company in the water. And remember, this is a reef break, so choose your line carefully. For the long range, the Wednesday the 16th window is the one to circle on your calendar, but it’s still a bit out so keep an eye on the forecasts.

Signing off, Rusty.

Short Range Forecast

Mostly dry. Warm (max 24°C on Sat morning, min 10°C on Wed night). Winds decreasing (strong winds from the ESE on Wed night, light winds from the E by Fri afternoon).

Days 5-7 Weather Summary

Mostly dry. Warm (max 27°C on Sat afternoon, min 12°C on Mon night). Wind will be generally light.

Wed
9
Thursday
10
Friday
11
Saturday
12
Sunday
13
Monday
14
Tuesday
15
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
3
2
2
3
3
3
3
1
2
1
0
1
2
0
1
3
3
3
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
2.4
SSW
18
2.1
SW
16
1.8
SW
16
1.7
SSW
16
1.4
SW
15
1.3
SW
15
1.3
SW
15
1.2
SW
16
1.1
SW
17
1.1
SW
16
0.7
SW
18
1
SW
16
0.9
SW
16
0.8
SW
15
0.8
SW
14
0.8
SW
14
0.6
SW
16
1.9
SW
14
1.8
SW
14
1.6
SW
14
Wave Graph
Metric surfscale
Energy kJ
3553
2187
1571
1460
893
685
753
746
742
546
307
515
416
262
241
238
211
1407
1218
1049
Wind (km/h)
35
SE
40
ESE
30
ENE
25
ESE
25
E
20
NE
10
ENE
10
ENE
20
NNE
15
NNW
20
NNE
10
W
20
S
15
SSE
10
SE
20
SSE
20
SE
25
ESE
25
SE
20
E
Wind State
cross-off
cross-off
off
cross-off
cross-off
off
off
off
cross-off
cross
cross-off
cross-on
cross-on
cross
cross-off
cross
cross-off
cross-off
cross-off
cross-off
High Tide
00:26AM0.90m
12:24PM1.29m
00:33AM1.03m
12:37PM1.26m
00:44AM1.14m
12:48PM1.22m
00:58AM1.24m
12:58PM1.18m
1:14AM1.30m
1:09PM1.14m
1:31AM1.32m
1:19PM1.09m
1:48AM1.30m
Low Tide
6:43PM0.10m
6:04AM0.12m
6:44PM0.07m
6:23AM0.05m
6:47PM0.04m
6:43AM0.02m
6:53PM-0.01m
7:01AM0.02m
7:01PM-0.05m
7:19AM0.05m
7:11PM-0.08m
7:37AM0.10m
7:23PM-0.08m
part cloud
part cloud
part cloud
part cloud
clear
part cloud
cloud
part cloud
clear
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:43
6:43
6:41
6:39
6:39
6:37
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:24
6:25
6:27
6:27
6:28
6:28
6:29
 mm
Temp °C
14
13
15
18
18
19
20
20
24
27
26
21
19
16
17
17
15
17
18
19
Feels °C
6
5
8
11
12
15
16
16
18
23
22
19
16
13
15
13
12
13
13
15
  • 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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