Castle Rock Surf Forecast

/ WA – Margaret River (57 breaks) / Western Australia (159 breaks) /

Australia (828 breaks) / Lat Long: (33.58° S 115.10° E)

Surf Forecasts:

Castle Rock surfForecast / WA – Margaret River / Australia

12 Day Weather and Surf, issued 7 pm Monday 20 Oct 2025 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 19.0° C
(Which is 1.4°C warmer than 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 Tuesday (Oct 21) at 11AM. The primary swell is predicted to be 1.3m and 11s period with a secondary swell of 0.4m and 6s. 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 2.2m 13s and forecast to arrive on Friday (Oct 24) at 11AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.3m 6s period and expected on Thursday (Oct 23) at 11PM.

Wave Type	Time (AWST) & Date	Wave Height & Period
Next good surf (1 star+)	11AM (Tue 21st Oct)	4.5ft (1.3m) 11s
Best Surf	11PM (Fri 24th Oct)	7ft (2.1m) 10s
Most Powerful	11AM (Fri 24th Oct)	7ft (2.2m) 13s

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

Updates in hr min s Forecast update imminent

12 Days Hourly

Print Table

	Short Range Forecast Some drizzle, heaviest during Mon night. Very mild (max 16°C on Thu afternoon, min 11°C on Tue night). Winds decreasing (fresh winds from the S on Mon night, calm by Wed morning).										Days 3-6 Weather Summary Light rain (total 3mm), mostly falling on Thu night. Very mild (max 16°C on Fri morning, min 12°C on Sat night). Winds decreasing (strong winds from the WSW on Fri morning, calm by Sun morning).
		Tuesday 21			Wednesday 22			Thursday 23			Friday 24			Saturday 25			Sunday 26			Mon 27
	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM
Rating (10 max)	1	1	0	0	0	0	1	0	0	0	0	0	0	1	1	0	1	1	0	0	1
Swell Height Map See all maps
Wave Height (m) & direction (?)	SW	WSW	WSW	SW	SW	W	WSW	WSW	W	WSW	WSW	WSW	WSW	WSW	WSW	WSW	WSW	WSW	WSW	WSW	WSW
Period(s) (?)	11	11	10	10	9	18	16	16	15	13	13	11	10	11	11	11	14	14	13	13	13
Wave Graph (?)
kJ (?)	860	382	216	217	127	230	354	406	435	1190	1514	1333	770	613	450	286	602	742	586	690	648
Wind (km/h)	S	S	SSW	ESE	WSW	SW	S	W	WNW	WSW	WSW	SW	S	SSW	SW	ESE	NNE	SSW	SE	ENE	SW
Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy	off	off	off	cross	glass	cross- off	off	cross- off	cross	cross- off	cross- off	cross- off	cross- off	off	off	cross	glass	off	cross- off	cross- on	off
High Tide / height (m)	8:56PM 0.59	10:27AM 0.35		9:03PM 0.63	11:57AM 0.31		9:12PM 0.67			9:24PM 0.70			9:42PM 0.71			10:06PM 0.71			10:34PM 0.69
Low Tide / height (m)	4:31AM 0.21	1:27PM 0.32			5:05AM 12:39PM 0.19 0.31			5:45AM 0.17			6:32AM 0.17			10:49AM 0.18			11:53AM 0.15			12:27PM 0.14

		Tuesday 21			Wednesday 22			Thursday 23			Friday 24			Saturday 25			Sunday 26			Mon 27
Sunrise	-	5:31	-	-	5:31	-	-	5:28	-	-	5:28	-	-	5:26	-	-	5:26	-	-	5:24	-
Sunset	-	-	6:36	-	-	6:37	-	-	6:37	-	-	6:38	-	-	6:39	-	-	6:40	-	-	6:42

Rain (mm)	1	-	-	-	-	-	-	-	-	2	1	-	-	-	-	-	-	-	-	-	-
Temp. °C	13	15	15	13	13	14	14	14	16	14	16	16	16	16	16	16	15	16	15	18	19
Feels °C (?)	6	11	10	8	11	11	10	12	11	8	7	8	10	14	13	13	14	13	10	16	17

Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)
Wind Speed (km/h)

Recent Eyeball Surf Reports for WA - Margaret River

Wind Update The wind is still offshore at Castle Rock (moderate winds from the S at Cape Naturaliste Lh 9 km from Castle Rock). 0.9m 11s groundswell from the WSW to make surfable waves.
40 minutes ago Castle Rock

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Actual: 40 min ago

24 km/h

Offshore

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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.

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.