Big Rock surfForecast / WA – Margaret River / Australia

information circle12 Day Weather and Surf, issued 1 pm Monday 05 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
21.2° C
(Which is 1.3°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 Wednesday (Jan 07) at 5AM. The primary swell is predicted to be 3.0m and 14s period. 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 3.0m 16s and forecast to arrive on Tuesday (Jan 06) at 11AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 4s period and expected on Monday (Jan 05) at 11PM.

Wave TypeTime (AWST) & Date Wave Height & Period
Next good surf (1 star+) 5AM (Wed 7th Jan)10ft (3.0m) 14s
Best Surf 5AM (Wed 7th Jan)10ft (3.0m) 14s
Most Powerful11AM (Tue 6th Jan)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

Short Range Forecast Mostly dry. Warm (max 21°C on Mon afternoon, min 14°C on Wed night). Winds decreasing (fresh winds from the SSW on Tue afternoon, light winds from the SE by Wed night).

Days 3-6 Weather Summary Mostly dry. Warm (max 25°C on Sat night, min 12°C on Fri night). Winds decreasing (strong winds from the SE on Fri night, calm by Sun morning).

Mon
05
Tuesday
06
Wednesday
07
Thursday
08
Friday
09
Saturday
10
Sunday
11
PMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAM
Rating
(10 max)
0
3
2
0
4
0
1
3
0
0
1
2
1
2
3
1
1
1
0
2
3
Swell
Height Map
Wave Height (m) & direction (?)
1.7
WSW
2.1
SW
3
SW
3
SW
3
SW
3
SW
3
SW
2.5
SW
2.3
SW
2
SW
1.4
SW
2.5
SSW
3
SSW
2.4
SSW
1.6
S
2.3
S
1.3
S
0.8
S
1
S
1
S
1
SW
Period(s) (?)111116141414131212121111101099888814
Wave
Graph
(?)Metric surfscale
Energy kJ (?)6579994295356636532923274020991427104047114661690115640484723585120115387
Wind
(km/h)
35
S
20
SSE
30
SSW
35
S
20
SSE
25
SSW
35
S
15
SE
25
SSW
30
SSW
30
SSE
30
SSE
40
SSE
25
ESE
10
SE
35
SSE
30
E
5
W
25
S
25
E
10
NNE
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
crosscross-
off
crosscrosscross-
off
cross-
on
crosscross-
off
cross-
on
cross-
on
cross-
off
cross-
off
cross-
off
cross-
off
cross-
off
cross-
off
offglasscrossoffcross-
off
High Tide
/ height (m)
10:16PM
0.82
10:33PM
0.74
10:34PM
0.64
10:00PM
0.56
8:22PM
0.51
5:59PM
0.53
5:25PM
0.59
Low Tide
/ height (m)
8:02AM
0.18
8:13AM
0.25
7:50AM
0.30
6:47AM
0.32
5:37AM
0.29
4:54AM
0.24
4:40AM
0.19
Mon
05
Tuesday
06
Wednesday
07
Thursday
08
Friday
09
Saturday
10
Sunday
11
Sunrise--5:16--5:16--5:16--5:18--5:18--5:20--5:20
Sunset7:34--7:34--7:34--7:34--7:34--7:34--7:34--
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
part cloud
part cloud
clear
part cloud
clear
clear
clear
part cloud
part cloud
cloud
Rain (mm)
---------------------
Temp. °C211819191720191717191919201622232525252525
Feels °C (?)17141312111613111614131212819192024212221
  • 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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