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Big Rock Surf Forecast
/ WA – Margaret River (57 breaks) / Western Australia (159 breaks) /
Big Rock surfForecast / WA – Margaret River / Australia
12 Day Weather and Surf, issued 1 pm Thursday 22 May 2025 AWST
Best Forecast Surf Conditions for Big Rock this week:
The surf forecast for Big Rock over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Friday (May 23) at 2PM. The primary swell is predicted to be 4.0m and 13s period. The wind is predicted to be cross-shore as the swell arrives.
The most powerful waves expected at Big Rock in the next 12 days are 4.5m 14s and forecast to arrive on Thursday (May 22) at 11PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.5m 7s period and expected on Thursday (May 29) at 5AM.
| Wave Type | Time (AWST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2PM (Fri 23rd May) | 13ft (4.0m) 13s |
| Best Surf | 2AM (Mon 26th May) | 10ft (3.0m) 15s |
| Most Powerful | 11PM (Thu 22nd May) | 15ft (4.5m) 14s |
Table - best surf conditions forecast for Big Rock over the next 12 days.
Thu 22 | Friday 23 | Saturday 24 | Sunday 25 | Monday 26 | Tuesday 27 | Wednesday 28 | Thursday 29 | Friday 30 | Saturday 31 | Sunday 01 | Monday 02 | Tue 03 | ||||||||||||||||||||||||
| PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | |
Rating (10 max) | ||||||||||||||||||||||||||||||||||||
Swell Height Map |  |  |  |  |  |  |  |  |  |  |  |  |  | |||||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||||||||||||||
| Period(s) (?) | 16 | 14 | 14 | 13 | 13 | 13 | 12 | 12 | 11 | 11 | 15 | 14 | 13 | 12 | 13 | 12 | 18 | 17 | 16 | 18 | 16 | 15 | 14 | 13 | 19 | 18 | 16 | 16 | 15 | 14 | 14 | 16 | 15 | 14 | 14 | 13 |
Wave (?)Graph  | ||||||||||||||||||||||||||||||||||||
| Energy (?) | 7008 | 7449 | 6693 | 5501 | 4258 | 3153 | 2454 | 2005 | 1148 | 1752 | 3645 | 2922 | 2196 | 1520 | 552 | 437 | 395 | 377 | 452 | 675 | 2555 | 2347 | 1441 | 874 | 1323 | 3375 | 2284 | 2697 | 2155 | 1408 | 1121 | 1178 | 1314 | 3724 | 6560 | 7395 |
Wind (km/h) | ||||||||||||||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- on | cross- on | cross- on | cross | cross | cross- on | on | cross- on | cross | cross- off | off | off | off | off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross | cross- off | cross- off | cross | cross- on | cross- on | cross- on | cross | cross | cross | cross- on | on | on | on | on |
High Tide / height (m) | 8:10PM 0.71 | 7:49AM 0.86 | 10:14PM 0.69 | 7:55AM 0.92 | 8:10AM 0.99 | 8:30AM 1.06 | 8:55AM 1.11 | 9:21AM 1.15 | 9:48AM 1.15 | 10:13AM 1.12 | 10:33AM 1.07 | 10:41AM 0.99 | 10:27AM 0.91 | 9:41AM 0.85 | ||||||||||||||||||||||
Low Tide / height (m) | 2:40PM 0.60 | 1:10AM 0.62 | 3:22PM 0.48 | 12:54AM 0.68 | 4:09PM 0.38 | 4:58PM 0.31 | 5:51PM 0.28 | 6:47PM 0.27 | 7:45PM 0.29 | 8:47PM 0.32 | 9:47PM 0.37 | 10:41PM 0.42 | 11:21PM 0.47 | 11:38PM 0.53 | ||||||||||||||||||||||
Thu 22 | Friday 23 | Saturday 24 | Sunday 25 | Monday 26 | Tuesday 27 | Wednesday 28 | Thursday 29 | Friday 30 | Saturday 31 | Sunday 01 | Monday 02 | Tue 03 | ||||||||||||||||||||||||
| Sunrise | - | - | 7:09 | - | - | 7:09 | - | - | 7:11 | - | - | 7:11 | - | - | 7:11 | - | - | 7:13 | - | - | 7:13 | - | - | 7:13 | - | - | 7:15 | - | - | 7:16 | - | - | 7:16 | - | - | 7:16 |
| Sunset | 5:22 | - | - | 5:22 | - | - | 5:22 | - | - | 5:22 | - | - | 5:21 | - | - | 5:21 | - | - | 5:20 | - | - | 5:20 | - | - | 5:19 | - | - | 5:19 | - | - | 5:19 | - | - | 5:19 | - | - |
 |  | |  |  |  |  | | | |  |  | | | | | | | |  | | | | |  |  | | | | | |  |  | | | | |
Rain (mm) | 3 | 2 | 2 | - | - | 1 | - | 2 | 3 | 1 | - | - | - | - | - | - | - | - | - | - | - | - | 2 | 2 | 5 | 4 | 3 | 4 | 8 | 4 | 4 | 20 | 6 | 5 | 7 | 2 |
| Temp. °C | 19 | 16 | 14 | 14 | 14 | 15 | 16 | 16 | 17 | 17 | 14 | 14 | 18 | 17 | 15 | 19 | 18 | 17 | 22 | 20 | 19 | 21 | 22 | 20 | 20 | 21 | 21 | 20 | 20 | 20 | 20 | 16 | 14 | 15 | 16 | 18 |
| Feels °C (?) | 12 | 8 | 6 | 7 | 10 | 10 | 11 | 10 | 11 | 13 | 10 | 10 | 15 | 12 | 9 | 15 | 12 | 10 | 16 | 12 | 11 | 14 | 14 | 13 | 14 | 18 | 19 | 17 | 18 | 14 | 12 | 7 | 2 | 0 | 6 | 10 |
Short Range Forecast: Moderate rain (total 13mm), heaviest on Thu afternoon. Very mild (max 19°C on Thu afternoon, min 13°C on Fri night). Winds decreasing (strong winds from the SSW on Thu night, light winds from the S by Fri night). | Days 3-6 Weather Summary Some drizzle, heaviest during Sun afternoon. Very mild (max 19°C on Tue afternoon, min 11°C on Mon night). Winds increasing (light winds from the E on Mon afternoon, fresh winds from the NE by Wed morning). | Days 6-9 Weather Summary Moderate rain (total 16mm), heaviest on Fri afternoon. Warm (max 22°C on Wed afternoon, min 19°C on Wed night). Mainly strong winds. | Long Range Forecast: Heavy rain (total 61mm), heaviest during Sun night. Warm (max 20°C on Sat afternoon, min 13°C on Sun night). Winds increasing (light winds from the NW on Sat night, severe gales from the WNW by Mon afternoon). | |||||||||||||||||||||||||||||||||
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Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
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 Big 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 Big Rock Surf forecast
The above surf forecast table for Big Rock provides essential information for determining whether the surfing conditions will be good over the next 12 days. A general guide to surfing at Big Rock can be found by selecting the local surf guide option on the grey menu. Our Big 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 (Big 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 Big 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.
Big Rock is 85 km (53 miles) from the city of Bunbury. If you plan a holiday in Margaret River, look for hotels and other accommodation in Bunbury. Bunbury has rooms for a wide range of budgets as well as car hire and transport links.
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