Castles surfForecast / SA – Nullarbor / Australia

information circle12 Day Weather and Surf, issued 3 pm Friday 26 Dec 2025 ACDT
Forecast update in hr  min  s Forecast update imminent
Castles surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Castles sea temperature is
20.1° C
(Which is 1.3°C warmer than normal for this time of year)


Best Forecast Surf Conditions for Castles this week:

The surf forecast for Castles over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Saturday (Dec 27) at 1AM. The primary swell is predicted to be 0.6m and 17s period with a secondary swell of 0.8m and 6s. Another secondary swell of 0.6m and 12s is also forecast. The wind is predicted to be offshore as the swell arrives.

The most powerful waves expected at Castles in the next 12 days are 1.8m 13s and forecast to arrive on Monday (Dec 29) at 7AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.8m 4s period and expected on Friday (Jan 02) at 10PM.

Wave TypeTime (ACDT) & Date Wave Height & Period
Next good surf (1 star+) 1AM (Sat 27th Dec)2ft (0.6m) 17s
Best Surf 1AM (Sat 27th Dec)2ft (0.6m) 17s
Most Powerful 7AM (Mon 29th Dec)6ft (1.8m) 13s

Table - best surf conditions forecast for Castles over the next 12 days.

Updates in  hr  min  s Forecast update imminent

Short Range Forecast Mostly dry. Warm (max 33°C on Sat morning, min 17°C on Sun night). Winds increasing (calm on Sun morning, strong winds from the SSW by Sun night).

Days 3-6 Weather Summary Mostly dry. Warm (max 21°C on Thu morning, min 15°C on Tue night). Winds decreasing (strong winds from the SSE on Tue afternoon, moderate winds from the SSE by Thu morning).

Fri
26
Saturday
27
Sunday
28
Monday
29
Tuesday
30
Wednesday
31
Thursday
01
PMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAM
Rating
(10 max)
0
2
0
0
1
1
0
1
1
0
0
0
0
0
0
0
0
0
0
0
2
Swell
Height Map
Wave Height (m) & direction (?)
0.9
SSW
0.6
SW
0.7
SW
0.6
SW
0.6
SW
0.6
SW
1.1
SW
1.3
SW
1.1
SW
1.6
SSW
0.8
SW
1.6
S
1.7
S
1.6
S
1
SW
1
SW
0.8
SW
0.8
SW
0.7
SW
0.7
SW
0.4
SW
Period(s) (?)121716161514161413121277713131212121120
Wave
Graph
(?)Metric surfscale
Energy kJ (?)247183251157134130560736431751193260263247340330217169137123141
Wind
(km/h)
30
SE
20
ENE
35
NNE
20
SE
20
E
5
W
25
SSW
20
SSE
30
SE
30
S
40
S
40
SSE
40
SSE
40
SE
35
SE
35
SSE
35
SE
25
ESE
30
SSE
20
SE
5
WNW
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
off
offcross-
off
cross-
off
offglasscross-
on
crosscross-
off
crosscrosscrosscrosscross-
off
cross-
off
crosscross-
off
cross-
off
crosscross-
off
glass
High Tide
/ height (m)
4:28AM
1.02
5:10PM
0.68
4:46AM
0.83
9:01PM
0.68
11:21PM
0.88
12:11PM
0.54
11:56PM
1.07
12:49PM
0.56
12:29AM
1.24
1:13PM
0.56
1:02AM
1.35
1:30PM
0.57
Low Tide
/ height (m)
9:43PM
0.32
11:21AM
0.36
10:16PM
0.49
12:03PM
0.43
2:01PM
0.48
7:15AM
0.41
4:23PM
0.45
7:28AM
0.27
5:15PM
0.38
7:53AM
0.18
5:52PM
0.29
8:19AM
0.14
Fri
26
Saturday
27
Sunday
28
Monday
29
Tuesday
30
Wednesday
31
Thursday
01
Sunrise--6:31--6:31--6:31--6:33--6:33--6:33--6:35
Sunset8:45--8:45--8:45--8:45--8:46--8:46--8:46--
part cloud
clear
clear
clear
clear
clear
clear
part cloud
part cloud
cloud
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
Rain (mm)
---------------------
Temp. °C272533332729231821191717171617171721201925
Feels °C (?)21202827222720151714111010911101117151723
  • 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 12 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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