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Surf Forecasts:

Castles surfForecast / SA – Nullarbor / Australia

information circle12 Day Weather and Surf, issued 9 pm Tuesday 17 Feb 2026 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
20.4° C
 (Which is 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 Friday (Feb 20) at 4AM. The primary swell is predicted to be 1.5m and 14s period. 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 Monday (Feb 23) at 4PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 3s period and expected on Tuesday (Feb 24) at 4AM.

Wave TypeTime (ACDT) & Date Wave Height & Period
Next good surf (1 star+) 4AM (Fri 20th Feb)5ft (1.5m) 14s
Best Surf 4AM (Fri 20th Feb)5ft (1.5m) 14s
Most Powerful 4PM (Mon 23rd Feb)8ft (2.4m) 16s

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

Updates in  hr  min  s Forecast update imminent 
12 DaysHourly
Print Table

Short Range Forecast Mostly dry. Warm (max 25°C on Fri morning, min 17°C on Tue night). Wind will be generally light.

Days 3-6 Weather Summary Some drizzle, heaviest during Sat night. Warm (max 29°C on Sat morning, min 17°C on Sun night). Winds increasing (calm on Sat morning, fresh winds from the SE by Mon morning).

Wednesday
18
Thursday
19
Friday
20
Saturday
21
Sunday
22
Monday
23
Tue
24
NightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPM
Rating
(10 max)
2
2
1
1
2
1
2
3
1
2
2
0
2
0
0
0
1
3
2
3
1
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
1.9
SW
1.8
SW
1.5
SW
1.4
SW
1.4
SW
1.4
SW
1.3
SW
1.6
SW
1.5
SW
1.3
SSW
1.1
SW
1
SW
1
SW
1.1
SW
1.1
SW
1
SW
1.5
SW
2.4
SW
1.6
SW
1.7
SSW
1.7
SSW
Period(s) (?)151413131313141414141313121212131616151414
Wave
Graph
(?)Metric surfscale
Energy kJ (?)1589116972164964964970695191160737432029139239232011512881115412611126
Wind
(km/h)
20
S
20
SSE
20
S
20
SSE
20
SE
25
SSE
20
SE
5
SE
20
S
20
ESE
10
ENE
15
SSW
10
E
15
WNW
20
SSW
35
SSE
40
SE
30
SSE
30
SE
20
ESE
30
S
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
crosscrosscrosscrosscross-
off		crosscross-
off		cross-
off		crosscross-
off		offcross-
on		offcross-
on		cross-
on		crosscross-
off		crosscross-
off		cross-
off		cross
High Tide
/ height (m)
2:04AM
1.48
2:13PM
1.07
2:25AM
1.45
2:33PM
1.14
2:44AM
1.37
2:54PM
1.20
3:00AM
1.25
3:14PM
1.21
3:11AM
1.11
3:35PM
1.19
3:14AM
0.97
3:53PM
1.13
3:01AM
0.87
4:07PM
1.02
Low Tide
/ height (m)
8:28AM
-0.04
8:03PM
-0.08
8:42AM
-0.04
8:28PM
-0.08
8:56AM
-0.04
8:53PM
-0.02
9:07AM
-0.01
9:17PM
0.08
9:16AM
0.01
9:37PM
0.23
9:20AM
0.04
9:49PM
0.40
9:18AM
0.07
Wednesday
18
Thursday
19
Friday
20
Saturday
21
Sunday
22
Monday
23
Tue
24
Sunrise-7:16--7:18--7:18--7:20--7:20--7:20--7:22-
Sunset--8:24--8:23--8:22--8:22--8:21--8:20--8:19
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
clear
part cloud
cloud
light rain
cloud
cloud
cloud
part cloud
clear
clear
part cloud
part cloud
Rain (mm)
------------1--------
Temp. °C171818182020182524212927242523181818182221
Feels °C (?)131514161717152321203025252523131212131917
  • 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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The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Castles surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.

View detailed surf forecast for Castles at:
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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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