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Surf Forecasts:

Big Rock surfForecast / WA – Margaret River / Australia

information circle12 Day Weather and Surf, issued 1 am Wednesday 14 Jan 2026 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
20.9° 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 (Jan 15) at 2AM. The primary swell is predicted to be 1.4m and 14s period with a secondary swell of 1.1m and 7s. Another secondary swell of 1.2m and 7s is also forecast. 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 4.5m 18s and forecast to arrive on Monday (Jan 19) 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 1.6m 6s period and expected on Wednesday (Jan 14) at 5PM.

Wave TypeTime (AWST) & Date Wave Height & Period
Next good surf (1 star+) 2AM (Thu 15th Jan)4.5ft (1.4m) 14s
Best Surf 8AM (Tue 20th Jan)11ft (3.5m) 17s
Most Powerful11PM (Mon 19th Jan)15ft (4.5m) 18s

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 Mostly dry. Warm (max 26°C on Thu afternoon, min 15°C on Wed night). Winds decreasing (fresh winds from the S on Wed afternoon, light winds from the W by Fri morning).

Days 3-6 Weather Summary Mostly dry. Warm (max 23°C on Mon morning, min 13°C on Sun night). Winds decreasing (fresh winds from the SSW on Sun afternoon, light winds from the SSW by Mon morning).

Wednesday
14
Thursday
15
Friday
16
Saturday
17
Sunday
18
Monday
19
Tuesday
20
AMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNight
Rating
(10 max)
3
1
4
1
1
3
3
0
0
1
0
2
2
1
3
3
3
8
4
0
1
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
1.8
SW
1
WSW
1.4
SW
1.4
SW
1.4
SW
1.6
SW
1.8
SW
1.7
SW
2
SW
2.4
SW
2.3
SW
3
SW
2.5
SW
2.4
SW
1.9
WSW
2.1
SW
1.9
SW
4
WSW
3.5
SW
3
WSW
2.5
WSW
Period(s) (?)141414131313141414141313131313132018161614
Wave
Graph
(?)Metric surfscale
Energy kJ (?)1255400846732711880113311701604217118662845213519221126149426879848574742582446
Wind
(km/h)
15
S
35
S
20
ESE
15
SW
30
S
20
ESE
10
W
30
SSW
25
SSW
20
WSW
25
SW
20
S
20
SSW
35
S
25
SE
15
SSW
35
S
20
SE
15
SW
35
S
45
SSE
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
crosscross-
off		offcross-
on		cross-
off		cross-
off		oncross-
on		cross-
on		cross-
on		cross-
on		crosscrosscrosscross-
off		crosscross-
off		cross-
off		cross-
on		crosscross-
off
High Tide
/ height (m)
6:42PM
0.79
7:15PM
0.84
7:48PM
0.89
8:23PM
0.92
8:59PM
0.92
9:37PM
0.90
10:14PM
0.85
Low Tide
/ height (m)
4:57AM
0.13
5:10AM
0.13
5:25AM
0.13
5:43AM
0.14
6:04AM
0.15
6:25AM
0.18
Wednesday
14
Thursday
15
Friday
16
Saturday
17
Sunday
18
Monday
19
Tuesday
20
Sunrise5:22--5:24--5:24--5:24--5:26--5:26--5:28--
Sunset-7:34--7:34--7:32--7:32--7:32--7:31--7:31-
clear
clear
clear
clear
part cloud
part cloud
clear
clear
part cloud
clear
clear
part cloud
part cloud
clear
clear
clear
clear
clear
clear
clear
part cloud
Rain (mm)
---------------------
Temp. °C232420232623252219192019192017232320262219
Feels °C (?)201916212118241917161714151411211815251914
  • 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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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.

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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