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Castle Rock Surf Forecast
/ WA – Margaret River (57 breaks) / Western Australia (159 breaks) /
Surf Forecasts:
Castle Rock surfForecast / WA – Margaret River / Australia
12 Day Weather and Surf, issued 1 am Friday 29 Aug 2025 AWST
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 Friday (Aug 29) at 11AM. The primary swell is predicted to be 1.1m and 10s period with a secondary swell of 0.2m and 20s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Castle Rock in the next 12 days are 5.5m 19s and forecast to arrive on Thursday (Sep 04) at 2AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.3m 2s period and expected on Friday (Aug 29) at 8AM.
| Wave Type | Time (AWST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11AM (Fri 29th Aug) | 3.5ft (1.1m) 10s |
| Best Surf | 2AM (Sun 31st Aug) | 6ft (1.8m) 19s |
| Most Powerful | 2AM (Thu 4th Sep) | 18ft (5.5m) 19s |
Table - best surf conditions forecast for Castle Rock over the next 12 days.
Short Range Forecast Mostly dry. Very mild (max 15°C on Sat night, min 11°C on Fri night). Wind will be generally light. | Days 3-6 Weather Summary Some drizzle, heaviest during Tue morning. Very mild (max 16°C on Mon afternoon, min 13°C on Tue night). Winds increasing (calm on Tue afternoon, fresh winds from the W by Wed night). | ||||||||||||||||||||
Friday 29 | Saturday 30 | Sunday 31 | Monday 01 | Tuesday 02 | Wednesday 03 | Thursday 04 | |||||||||||||||
| AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Rating (10 max) | |||||||||||||||||||||
Swell Height Map |  |  |  |  |  |  |  | ||||||||||||||
| Wave Height (m) & direction (?) | |||||||||||||||||||||
| Period(s) (?) | 10 | 9 | 18 | 16 | 16 | 19 | 17 | 16 | 16 | 15 | 14 | 13 | 13 | 14 | 15 | 15 | 11 | 19 | 17 | 16 | 14 |
Wave (?)Graph  | |||||||||||||||||||||
| Energy (?) | 302 | 333 | 440 | 386 | 609 | 2443 | 3691 | 3197 | 2459 | 1622 | 1463 | 1493 | 1622 | 2153 | 2445 | 3966 | 3307 | 21660 | 13999 | 8680 | 4314 |
Wind (km/h) | |||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- off | cross- off | cross- off | cross- on | off | glass | cross- on | cross | cross | cross- off | cross- off | cross- off | cross | glass | cross | cross- off | cross- off | cross- off | cross- off | cross- off | cross |
High Tide / height (m) | 12:04AM 0.58 | 12:41AM 0.59 | 1:56AM 0.59 | 5:09AM 0.61 | 6:16AM 0.65 | 7:07AM 0.69 | |||||||||||||||
Low Tide / height (m) | 3:07PM 0.21 | 2:54PM 0.17 | 3:03PM 0.13 | 3:17PM 0.10 | 3:32PM 0.07 | 3:48PM 0.05 | 4:05PM 0.04 | ||||||||||||||
Friday 29 | Saturday 30 | Sunday 31 | Monday 01 | Tuesday 02 | Wednesday 03 | Thursday 04 | |||||||||||||||
| Sunrise | 6:41 | - | - | 6:41 | - | - | 6:39 | - | - | 6:37 | - | - | 6:37 | - | - | 6:35 | - | - | 6:33 | - | - |
| Sunset | - | 5:59 | - | - | 6:00 | - | - | 6:00 | - | - | 6:00 | - | - | 6:01 | - | - | 6:01 | - | - | 6:02 | - |
 | |  |  |  | | | | | | | |  | | | | |  | | | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | 1 | - | - | - | - | - | - | - | - |
| Temp. °C | 13 | 14 | 13 | 13 | 14 | 15 | 15 | 15 | 15 | 15 | 16 | 16 | 15 | 16 | 15 | 16 | 16 | 16 | 15 | 15 | 15 |
| Feels °C (?) | 10 | 12 | 8 | 11 | 13 | 13 | 11 | 11 | 12 | 11 | 12 | 12 | 14 | 15 | 14 | 13 | 11 | 10 | 7 | 9 | 11 |
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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
The wind is still cross-off at Castle Rock (light winds from the SSE at Cape Naturaliste Lh 9 km from Castle Rock). 1.4m 10s swell from the SW with a 0.4m 12s groundswell from the WSW. 2 swells combining to make bigger set waves.
1 h 6 min ago
FREE! Surf-Forecast.com widget for your website
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.
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