Castles surfForecast / SA – Nullarbor / Australia

information circle12 Day Weather and Surf, issued 9 am Friday 19 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
20.3° C
(Which is 1.8°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 20) at 10PM. The primary swell is predicted to be 0.8m and 9s period with a secondary swell of 0.1m and 16s. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Castles in the next 12 days are 2.4m 16s and forecast to arrive on Tuesday (Dec 23) at 7PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.2m 6s period and expected on Thursday (Dec 25) at 4AM.

Wave TypeTime (ACDT) & Date Wave Height & Period
Next good surf (1 star+)10PM (Sat 20th Dec)2.5ft (0.8m) 9s
Best Surf10AM (Fri 26th Dec)3ft (0.9m) 12s
Most Powerful 7PM (Tue 23rd Dec)8ft (2.4m) 16s

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 21°C on Sat morning, min 16°C on Fri night). Mainly strong winds.

Days 3-6 Weather Summary Mostly dry. Very mild (max 19°C on Tue morning, min 16°C on Mon morning). Winds increasing (light winds from the S on Mon morning, fresh winds from the SSE by Wed afternoon).

Friday
19
Saturday
20
Sunday
21
Monday
22
Tuesday
23
Wednesday
24
Thursday
25
AMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNight
Rating
(10 max)
0
0
1
1
0
0
0
0
2
0
0
0
1
1
1
3
0
1
0
0
1
Swell
Height Map
Wave Height (m) & direction (?)
1.2
SSW
1.3
SSW
1.2
SSW
1.1
SSW
0.9
SSW
1.1
SW
2.2
SW
2.1
SW
1.6
SW
1.1
SW
1.1
SW
0.6
SW
1.1
SW
1.7
SW
1.9
SW
1.6
SW
1.4
SW
1.3
SW
1.2
SW
1.2
SW
1.1
SW
Period(s) (?)67899981012111113131716151414131313
Wave
Graph
(?)Metric surfscale
Energy kJ (?)107137155206130202665800747314254134374164316941155813605495488363
Wind
(km/h)
30
S
30
S
25
SE
20
SE
30
SSW
40
WSW
45
SW
40
S
20
S
15
S
25
SSW
20
SSE
20
SSE
25
S
25
SSE
25
SSE
30
SSE
35
SE
30
SE
30
SSE
30
ESE
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
crosscrosscross-
off
cross-
off
cross-
on
oncross-
on
cross-
on
crosscross-
on
cross-
on
crosscrosscrosscrosscross-
off
crosscross-
off
cross-
off
crosscross-
off
High Tide
/ height (m)
12:55PM
0.75
1:15AM
1.37
1:18PM
0.78
1:40AM
1.41
1:41PM
0.80
2:06AM
1.43
2:05PM
0.81
2:33AM
1.42
2:32PM
0.80
3:01AM
1.39
3:02PM
0.78
3:30AM
1.31
3:35PM
0.75
4:00AM
1.19
Low Tide
/ height (m)
6:27PM
0.12
7:56AM
0.15
6:53PM
0.07
8:19AM
0.14
7:19PM
0.03
8:44AM
0.14
7:45PM
0.02
9:11AM
0.15
8:13PM
0.04
9:40AM
0.18
8:41PM
0.09
10:12AM
0.22
9:11PM
0.19
Friday
19
Saturday
20
Sunday
21
Monday
22
Tuesday
23
Wednesday
24
Thursday
25
Sunrise6:26--6:26--6:28--6:28--6:28--6:28--6:30--
Sunset-8:42--8:42--8:43--8:43--8:44--8:44--8:45-
part cloud
clear
clear
clear
cloud
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
Rain (mm)
---------------------
Temp. °C181817211921181716181817191917181716201921
Feels °C (?)14131319152010911141414161612131110151416
  • 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 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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