Castles Surf Break

Lat Long: 32.09° S 132.98° E

Castles Surf Forecast and Surf Report

Issued: 2 am 31 Jul 2026 (local time)

Forecast update in  hr  min

Today's Castles sea temperature is
15.5° C
0.4° 

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


Castles surf forecast from 30 Jul 2026:

  • Best quality surf: Thursday 6 Aug, 9PM (local time) - 5ft (1.6m), 17s period, SW swell with offshore winds.
  • Most powerful swell: Monday 3 Aug, 12AM (local time) - 8ft (2.5m), 15s period, SW swell with 3,185 kJ wave energy.
  • Next surfable swell (1★+): Friday 31 Jul, 3PM (local time) - 3ft (0.9m), 14s 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 (Jul 31) at 3PM. The primary swell is predicted to be 0.9m and 14s period with a secondary swell of 0.6m and 20s. 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 2.5m 15s and forecast to arrive on Monday (Aug 03) 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 0.9m 4s period and expected on Saturday (Aug 01) at 9AM.

Wave TypeTime (ACST) & Date Wave Height & Period
Next good surf (1 star+) 3PM (Fri 31st Jul)3ft (0.9m) 14s
Best Surf 9PM (Thu 6th Aug)5ft (1.6m) 17s
Most Powerful12AM (Mon 3rd Aug)8ft (2.5m) 15s

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


The Lowdown

Right, folks, Rusty here. Let’s have a look at what’s cooking for Castles.

We’ve got a bit of a slow start, but the first real showing is on Friday, July 31st. The morning is clean with a 3ft SW swell, but it’s only groaning along with a moderate combined energy of 480, so it’s not exactly firing. The afternoon is where it gets a little more interesting – the swell bumps up to 3ft from the SW, but the period stretches to 14 seconds, giving it some real push. The energy jumps to 608, and the wind is a gentle cross-offshore breeze. It’s clean, it’s rideable, and for a late Friday session, you could do a lot worse.

Saturday, August 1st sees a bit more size, with a 4ft SW groundswell (17-second period) in the morning. The energy is up to 765, but a fresh 30 km/h cross-offshore wind makes it tricky. The afternoon gets bigger – 5ft SW – and the energy hits 1094, but the wind swings cross-shore and it gets a bit lumpy. Not the best.

Sunday, August 2nd is a write-off. Strong onshore winds and a 5ft to 6ft SW swell make for poor surf. The energy is massive, but it’s all junk. Wind is just too strong from the wrong direction.

Monday, August 3rd is a bit of a mixed bag. The morning shows a 6ft SW swell with a light cross-shore breeze, and the energy is 1273. It’s marginal, but the afternoon sees a drop to 5ft with a gentle cross-shore. There’s potential for a few clean-ish ones if you pick your tides.

Now, Tuesday, August 4th is a real standout. The morning has a 4ft SW swell but with a beautiful offshore breeze from the NE at 30 km/h. The energy is 542, and the wave comment says it all: “expect very good surf conditions.” It’s clean, the swell is from the optimum direction, and the wind is perfect. This is the session to aim for.

The following week gets a bit messy. Wednesday, August 5th has a 3ft SW swell but with a screaming 30 km/h wind, and Thursday, August 6th has a glassy morning with a 4ft SW swell (energy 733) and a slight air – very clean. The afternoon picks up to 5ft, but the wind gets cross-shore.

The huge highlight, though, is Saturday, August 8th. The afternoon delivers a 8ft SW swell with glassy conditions. The energy is a massive 2199. This is heavy, clean, and powerful. It’s for experienced surfers only – this is big, strong groundswell. The break is a reef, so expect it to really stand up and pitch. If you’re comfortable in that size, this is the best session of the whole 16-day window.

After that, it’s a gut-wrencher. From Sunday, August 9th through to the 15th, the wind turns onshore and brutal. We’re talking near-gale force winds from the west and WNW, with swell heights over 10ft and combined energy in the thousands. This is pure, blown-out chaos. The water temperature is around 60°, which is about normal for the time of year.

So, the call is clear: if you want a clean, fun, manageable wave, hit Tuesday, August 4th in the morning. If you want a serious, heavy, and powerful session, you want Saturday, August 8th in the afternoon. Everything else is either marginal or blown out.

Rusty.

Short Range Forecast

Mostly dry. Very mild (max 18°C on Sat afternoon, min 11°C on Fri morning). Mainly fresh winds.

Days 4-6 Weather Summary

Mostly dry. Very mild (max 18°C on Tue afternoon, min 9°C on Tue morning). Winds decreasing (fresh winds from the N on Wed morning, light winds from the SSE by Wed night).

Friday
31
Saturday
1
Sunday
2
Monday
3
Tuesday
4
Wednesday
5
Thursday
6
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
1
3
2
1
2
2
0
0
0
3
3
3
3
2
2
1
0
1
3
3
4
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.9
SW
13
0.9
SW
14
0.7
SW
18
1.1
SW
17
1.4
SW
17
1.4
SW
16
1.6
SW
15
1.9
SW
15
2.5
SW
15
1.8
SW
14
1.6
SW
14
1.3
SW
13
1.1
SW
12
1.1
SW
15
0.8
SW
16
0.8
SW
19
1.2
SW
18
1.2
SW
16
1.2
SW
16
1.5
SW
16
1.7
SW
16
Wave Graph
Metric surfscale
Energy kJ
299
331
307
760
1081
1029
1147
1486
3185
1273
924
600
309
492
287
510
871
737
728
1123
1529
Wind (km/h)
20
NNE
15
NNE
20
NNE
30
N
25
NNW
30
N
20
WSW
35
WSW
20
SSW
10
SSE
15
S
15
E
20
NE
15
N
20
NE
30
N
20
WSW
10
SSW
5
SSE
15
SSE
15
ENE
Wind State
cross-off
cross-off
cross-off
cross-off
cross
cross-off
on
on
cross-on
cross
cross
off
off
cross-off
cross-off
cross-off
on
cross-on
cross-off
cross
off
High Tide
1:22PM1.42m
1:30AM0.97m
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
Low Tide
7:50PM0.04m
7:16AM-0.00m
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
clear
clear
clear
clear
clear
clear
part cloud
part cloud
clear
clear
clear
clear
part cloud
part cloud
cloud
clear
clear
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:28
7:26
7:26
7:26
7:24
7:24
7:22
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:00
6:00
6:00
6:01
6:02
6:02
6:04
 mm
Temp °C
14
16
15
15
18
17
14
15
14
14
14
13
14
18
17
18
16
15
16
16
16
Feels °C
8
11
9
7
11
10
10
7
7
11
10
9
9
14
12
13
12
14
14
13
12
  • 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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