Big Rock surfForecast / WA – Margaret River / Australia

information circle12 Day Weather and Surf, issued 1 pm Thursday 01 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
20.8° C
(Which is 1.0°C warmer than normal for this time of year)


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 Sunday (Jan 04) at 8AM. The primary swell is predicted to be 1.6m and 11s period with a secondary swell of 0.1m and 12s. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Big Rock in the next 12 days are 3.5m 14s and forecast to arrive on Tuesday (Jan 06) 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 1.7m 6s period and expected on Friday (Jan 02) at 2PM.

Wave TypeTime (AWST) & Date Wave Height & Period
Next good surf (1 star+) 8AM (Sun 4th Jan)5ft (1.6m) 11s
Best Surf 8AM (Sun 4th Jan)5ft (1.6m) 11s
Most Powerful11PM (Tue 6th Jan)11ft (3.5m) 14s

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

Updates in  hr  min  s Forecast update imminent

Short Range Forecast Mostly dry. Warm (max 25°C on Fri morning, min 15°C on Sat night). Winds decreasing (fresh winds from the S on Fri afternoon, light winds from the SSE by Sun morning).

Days 3-6 Weather Summary Mostly dry. Warm (max 21°C on Sun afternoon, min 15°C on Sun night). Mainly fresh winds.

Thu
01
Friday
02
Saturday
03
Sunday
04
Monday
05
Tuesday
06
Wednesday
07
PMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAM
Rating
(10 max)
3
3
1
1
3
0
0
2
0
0
2
0
0
2
0
2
4
2
0
3
1
Swell
Height Map
Wave Height (m) & direction (?)
2.5
SW
2.4
SW
2.3
SW
2.1
SW
1.9
SW
1.7
SW
1.6
SW
1.5
SW
1.6
SW
1.4
SW
1.7
SW
1.8
SW
1.7
WSW
2
SW
2.4
SW
3
SW
3.5
SW
3
SW
3
SW
3
SW
2.3
SW
Period(s) (?)161514141312121211111211111114151414131312
Wave
Graph
(?)Metric surfscale
Energy kJ (?)326324242032161512108336786036294627607666459322323391842743751320824451539
Wind
(km/h)
30
SSE
25
SE
25
S
35
SSE
25
SSE
25
S
35
S
20
SE
25
SSW
30
S
15
SE
30
SSW
30
SSW
20
SSE
30
SSW
35
S
15
ESE
25
S
35
S
25
SE
30
S
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
off
cross-
off
crosscross-
off
cross-
off
crosscrosscross-
off
cross-
on
crosscross-
off
cross-
on
crosscross-
off
cross-
on
crosscross-
off
crosscrosscross-
off
cross
High Tide
/ height (m)
8:04PM
0.91
8:41PM
0.94
9:17PM
0.93
9:49PM
0.89
10:16PM
0.82
10:33PM
0.74
10:34PM
0.64
Low Tide
/ height (m)
5:37AM
0.01
6:19AM
0.02
6:59AM
0.06
7:35AM
0.12
8:02AM
0.18
8:13AM
0.25
7:50AM
0.30
Thu
01
Friday
02
Saturday
03
Sunday
04
Monday
05
Tuesday
06
Wednesday
07
Sunrise--5:11--5:13--5:13--5:15--5:16--5:16--5:16
Sunset7:34--7:34--7:34--7:34--7:34--7:34--7:34--
part cloud
part cloud
clear
part cloud
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
part cloud
clear
clear
clear
clear
clear
clear
Rain (mm)
---------------------
Temp. °C241925241925251922211921211918191820211720
Feels °C (?)191421181421191419161517161616131315141115
  • 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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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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