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Surf Forecasts:

Big Rock surfForecast / WA – Margaret River / Australia

information circle12 Day Weather and Surf, issued 7 pm Thursday 20 Nov 2025 AWST
Forecast update in hr  min  s Forecast update imminent
Big Rock surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Big Rock sea temperature is
19.3° C
 (Which is slightly warmer than usual)

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 Thursday (Nov 20) at 11PM. The primary swell is predicted to be 1.5m and 12s period with a secondary swell of 0.2m and 17s. The wind is predicted to be offshore as the swell arrives.

The most powerful waves expected at Big Rock in the next 12 days are 3.0m 16s and forecast to arrive on Thursday (Nov 27) at 11PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 6s period and expected on Friday (Nov 28) at 2AM.

Wave TypeTime (AWST) & Date Wave Height & Period
Next good surf (1 star+)11PM (Thu 20th Nov)5ft (1.5m) 12s
Best Surf 2AM (Wed 26th Nov)6ft (1.9m) 10s
Most Powerful11PM (Thu 27th Nov)10ft (3.0m) 16s

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

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

Short Range Forecast Light rain (total 2mm), mostly falling on Sat afternoon. Warm (max 22°C on Fri afternoon, min 15°C on Fri night). Winds increasing (light winds from the SSE on Fri morning, strong winds from the WSW by Sun afternoon).

Days 3-6 Weather Summary Some drizzle, heaviest during Mon night. Very mild (max 17°C on Wed afternoon, min 11°C on Tue night). Winds decreasing (strong winds from the SW on Sun night, light winds from the ESE by Wed morning).

Friday
21
Saturday
22
Sunday
23
Monday
24
Tuesday
25
Wednesday
26
Thu
27
NightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPM
Rating
(10 max)
3
3
2
2
0
0
0
0
0
0
0
0
0
0
1
4
0
0
3
1
1
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
1.5
SSW
1.3
SSW
1.2
S
1
WSW
1
WSW
1
WSW
1
WSW
2.1
SW
2.1
SW
2.1
SW
2.5
WSW
3
WSW
3.5
SW
3
SW
2.5
SW
1.9
SW
0.8
WSW
0.9
WSW
1.1
WSW
1.3
WSW
2.1
WSW
Period(s) (?)121110131212127891312111111101615151417
Wave
Graph
(?)Metric surfscale
Energy kJ (?)585394268326283269265422464692225325213013188214327093353535517122624
Wind
(km/h)
20
ESE
5
SSE
25
SSE
20
E
10
NW
25
SW
30
SW
40
SW
40
WSW
30
SW
25
WSW
25
WSW
35
SW
25
SSW
25
SSW
15
SE
15
WSW
20
SSW
15
ESE
20
SSW
30
S
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
offcross-
off		cross-
off		offcross-
on		cross-
on		cross-
on		cross-
on		cross-
on		cross-
on		cross-
on		cross-
on		cross-
on		cross-
on		crosscross-
off		oncross-
on		cross-
off		crosscross
High Tide
/ height (m)
8:48PM
0.87
9:10PM
0.92
9:35PM
0.94
10:02PM
0.95
10:31PM
0.92
11:00PM
0.87
11:24PM
0.78
Low Tide
/ height (m)
6:21AM
0.17
6:58AM
0.18
7:40AM
0.19
8:29AM
0.21
9:24AM
0.23
10:18AM
0.25
11:06AM
0.27
Friday
21
Saturday
22
Sunday
23
Monday
24
Tuesday
25
Wednesday
26
Thu
27
Sunrise-5:05--5:05--5:03--5:03--5:03--5:03--5:03-
Sunset--7:06--7:07--7:07--7:08--7:09--7:09--7:10
part cloud
part cloud
clear
part cloud
part cloud
thunderstorm
thunderstorm
part cloud
clear
cloud
part cloud
part cloud
rain showers
clear
clear
part cloud
clear
clear
clear
part cloud
part cloud
Rain (mm)
-----11-----1--------
Temp. °C192122182019181616151616161616141517161918
Feels °C (?)1520211519171376710101091091213121613
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
Map placeholder

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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 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.

View detailed surf forecast for Big Rock at:
surf-forecast.com

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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