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Surf Forecasts:

Castle Rock surfForecast / WA – Margaret River / Australia

information circle12 Day Weather and Surf, issued 1 pm Thursday 12 Mar 2026 AWST
Forecast update in hr  min  s Forecast update imminent
Castle Rock surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Castle Rock sea temperature is
21.0° C
 (Which is normal for this time of year)

Best Forecast Surf Conditions for Castle Rock this week:

The surf forecast for Castle Rock over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Sunday (Mar 15) at 5PM. The primary swell is predicted to be 1.3m and 13s period. The wind is predicted to be offshore as the swell arrives.

The most powerful waves expected at Castle Rock in the next 12 days are 1.6m 19s and forecast to arrive on Friday (Mar 13) at 8AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 11s period and expected on Friday (Mar 13) at 2PM.

Wave TypeTime (AWST) & Date Wave Height & Period
Next good surf (1 star+) 5PM (Sun 15th Mar)4.5ft (1.3m) 13s
Best Surf 5PM (Thu 19th Mar)5ft (1.6m) 14s
Most Powerful 8AM (Fri 13th Mar)5ft (1.6m) 19s

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

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

Short Range Forecast Mostly dry. Warm (max 25°C on Sat afternoon, min 15°C on Thu night). Mainly fresh winds.

Days 3-6 Weather Summary Mostly dry. Warm (max 28°C on Tue afternoon, min 17°C on Sun night). Mainly fresh winds.

Thu
12
Friday
13
Saturday
14
Sunday
15
Monday
16
Tuesday
17
Wednesday
18
PMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAM
Rating
(10 max)
0
0
0
0
0
1
1
0
0
1
0
1
0
0
0
1
0
0
1
0
0
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
1.1
WSW
1.5
WSW
1.6
WSW
1.6
WSW
1.6
WSW
1.5
WSW
1.4
WSW
1.4
WSW
1.3
WSW
1.3
WSW
1.3
WSW
1.1
WSW
1.1
WSW
1.1
SW
1
WSW
1.1
SW
1
SW
1
SW
1
SW
0.9
SW
1.6
SW
Period(s) (?)222018171616151414131313131313131312121916
Wave
Graph
(?)Metric surfscale
Energy kJ (?)1165162516521543135411418977966035455364274213883574123263012825771300
Wind
(km/h)
15
E
30
ESE
25
E
20
E
25
ESE
15
ESE
20
S
25
ESE
15
E
25
SSW
25
ESE
5
E
30
SSW
30
ESE
10
ENE
25
SSW
25
E
20
NE
15
WSW
25
E
25
NNE
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
on		crosscrosscrosscrosscrosscross-
off		crosscrossoffcrossglassoffcrosscross-
on		offcrossoncross-
off		cross-
on		on
High Tide
/ height (m)
4:24PM
0.58
6:03PM
0.60
6:58PM
0.63
7:43PM
0.65
11:17AM
0.37
8:25PM
0.65
10:35AM
0.39
9:07PM
0.62
10:27AM
0.42
9:51PM
0.56
10:26AM
0.48
Low Tide
/ height (m)
3:22AM
0.09
3:37AM
0.08
3:50AM
0.08
4:02AM
0.10
12:49PM
0.37
4:13AM
0.13
2:21PM
0.33
4:21AM
0.18
3:23PM
0.29
4:23AM
0.24
Thu
12
Friday
13
Saturday
14
Sunday
15
Monday
16
Tuesday
17
Wednesday
18
Sunrise--6:16--6:16--6:18--6:18--6:18--6:20--6:20
Sunset6:42--6:40--6:38--6:37--6:37--6:35--6:34--
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
clear
Rain (mm)
---------------------
Temp. °C232121242122252423262222252225282528312829
Feels °C (?)201616211620212022221923211824252125292526
  • 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 Castle Rock 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 Castle Rock at:
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Information about the Castle Rock Surf forecast

The above surf forecast table for Castle Rock provides essential information for determining whether the surfing conditions will be good over the next 12 days. A general guide to surfing at Castle Rock can be found by selecting the local surf guide option on the grey menu. Our Castle Rock 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 (Castle Rock) 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 Castle Rock 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.

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