Snow-ForecastSnow-ForecastMountain-ForecastMountain-ForecastTide-ForecastTide-ForecastWeather-ForecastWeather-Forecast
Search by country, region, or break
Search by country, region, or break

Quick Links

Surf Forecasts:

Big Rock surfForecast / WA – Margaret River / Australia

information circle12 Day Weather and Surf, issued 1 am Friday 19 Sep 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
17.5° C
 (Which is 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 Friday (Sep 19) at 11PM. The primary swell is predicted to be 3.5m 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 4.5m 14s and forecast to arrive on Friday (Sep 19) at 5AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 4s period and expected on Sunday (Sep 21) at 8PM.

Wave TypeTime (AWST) & Date Wave Height & Period
Next good surf (1 star+)11PM (Fri 19th Sep)11ft (3.5m) 14s
Best Surf11AM (Mon 22nd Sep)7ft (2.1m) 19s
Most Powerful 5AM (Fri 19th Sep)15ft (4.5m) 14s

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 Some drizzle, heaviest during Fri morning. Very mild (max 17°C on Sun morning, min 12°C on Sat night). Wind will be generally light.

Days 3-6 Weather Summary Mostly dry. Warm (max 23°C on Tue night, min 15°C on Wed night). Wind will be generally light.

Friday
19
Saturday
20
Sunday
21
Monday
22
Tuesday
23
Wednesday
24
Thursday
25
AMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNight
Rating
(10 max)
0
5
5
2
2
4
3
2
5
6
5
4
5
4
5
4
4
5
4
2
3
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
4.5
SW
4
SW
3.5
SW
3
SW
2.5
SW
2.3
SW
2.3
SW
2.5
SW
2.5
SW
2.1
WSW
3
WSW
3
WSW
3
WSW
2.5
WSW
2.1
WSW
3
WSW
3
WSW
3
WSW
2.5
WSW
2.5
WSW
2.4
WSW
Period(s) (?)141414141313131414191817161616161515161414
Wave
Graph
(?)Metric surfscale
Energy kJ (?)734660584277292323811791181923792471322956614873382735102343461742044060351429682129
Wind
(km/h)
20
SSW
20
SSW
10
SSE
10
SW
20
SSW
15
SE
10
S
25
S
15
ESE
10
NE
15
S
15
ENE
15
NNE
10
N
15
NE
15
N
10
WNW
10
ESE
10
S
20
S
15
S
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
on		crosscross-
off		cross-
on		crosscross-
off		crosscrossoffcross-
off		crosscross-
off		cross-
off		crosscross-
off		crosscross-
on		cross-
off		crosscrosscross
High Tide
/ height (m)
8:24AM
0.76
11:12PM
0.55
9:05AM
0.71
10:33PM
0.55
9:39AM
0.64
10:10PM
0.57
10:06AM
0.57
10:02PM
0.62
10:26AM
0.50
10:06PM
0.67
10:37AM
0.44
10:19PM
0.72
10:33AM
0.40
10:36PM
0.77
Low Tide
/ height (m)
4:22PM
0.29
2:44AM
0.51
4:26PM
0.34
3:27AM
0.44
4:14PM
0.39
4:08AM
0.39
3:49PM
0.41
4:48AM
0.36
3:17PM
0.41
5:30AM
0.35
2:44PM
0.39
6:20AM
0.35
2:15PM
0.37
Friday
19
Saturday
20
Sunday
21
Monday
22
Tuesday
23
Wednesday
24
Thursday
25
Sunrise6:15--6:13--6:11--6:09--6:09--6:07--6:05--
Sunset-6:13--6:14--6:15--6:15--6:15--6:16--6:16-
rain showers
clear
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
cloud
part cloud
Rain (mm)
1--------------------
Temp. °C161615151514171716192021212223222219201816
Feels °C (?)121212131211161411182019171720191919191414
  • 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

Eyeball surf reportRecent Eyeball Surf Reports for WA - Margaret River

  1. weather stationWind Update The wind is still cross-on at Big Rock (moderate winds from the WSW at Witchcliffe 21 km from Big Rock). A 4.1m groundswell from the SW is too big for here

    51 minutes ago Big Rock
Expand
<
>
View all

21 km away, 51 min ago

20 km/h
WSW
0.0
17.5
Air / Water (°C)
Please reload the page to see if there are any updates.

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.

Nearest
Nearest
Nearest