Surf Forecasts:
Big Rock surf forecast from 9 Jul 2026:
- Best quality surf: Monday 13 Jul, 11PM (local time) - 11ft (3.5m), 15s period, SW swell with cross-offshore winds.
- Most powerful swell: Monday 13 Jul, 2AM (local time) - 11ft (3.5m), 18s period, SW swell with 7,992 kJ wave energy.
- Next surfable swell (1★+): Saturday 11 Jul, 8PM (local time) - 10ft (3.0m), 13s period with SW swell.
Best Forecast Surf Conditions for Big Rock this week:
The surf forecast for Big Rock over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Saturday (Jul 11) at 8PM. The primary swell is predicted to be 3.0m and 13s period with a secondary swell of 1.1m and 18s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Big Rock in the next 16 days are 3.5m 18s and forecast to arrive on Monday (Jul 13) at 2AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.2m 7s period and expected on Wednesday (Jul 15) at 2PM.
| Wave Type | Time (AWST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8PM (Sat 11th Jul) | 10ft (3.0m) 13s |
| Best Surf | 11PM (Mon 13th Jul) | 11ft (3.5m) 15s |
| Most Powerful | 2AM (Mon 13th Jul) | 11ft (3.5m) 18s |
Table - best surf conditions forecast for Big Rock over the next 16 days.
What's up, Rusty here, breaking down the next 16 days at Big Rock.
It's gonna take a minute to get going. The first few days are blown out with crummy wind, so don't bother paddling out until next week. When it lights up, it'll be worth the wait.
From Friday the 10th through Saturday the 11th, the swell is building from the SW at 8ft to 10ft, but with cross and cross-shore winds out of the SSW and S, it’s going to be choppy and weak. The energy is moderate (2558 to 3208), but it's a pass.
Sunday the 12th sees a big long-period groundswell hit 10ft with a 17-second interval. The energy is very strong (8181), but it's still cross-onshore, so it’s powerful but bumpy. Monday the 13th stays heavy at 12ft with a 16-second period, but the wind is still light and cross.
Circle Tuesday the 14th. That's the one. The swell drops to a clean 10ft from the SW, and the wind goes light and cross-offshore from the NE. Those 15-second sets will be lined up and powerful, delivering excellent conditions for experienced surfers. The energy is very strong (4462). Water temp is about average for this time of year.
Following some rough weather mid-week, we hit the biggest day of the run on Saturday the 18th of July. A massive 16ft to 20ft SW groundswell rolls in with a 15-second period and insane energy (13798). The wind is moderate cross-shore from the south. Experts only. Do not even think about it if you are not one.
The pick for a slightly less insane but still epic day is Sunday the 19th. The swell is a solid 13ft in the morning, dropping to 10ft, but the wind goes glassy. Light NE and then light W. That's as good as it gets. The energy is strong (4635), and with glass-off conditions, it’ll be a surfer's dream for the experienced crowd.
There are other promising windows on Wednesday the 22nd and Saturday the 25th with clean offshore winds and 7ft to 12ft SW groundswell. The 25th in particular is looking exceptional, with clean light NE winds and a very long 17-second period. That one is a potential standout a week and a half out.
Bottom line: Tuesday the 14th and Sunday the 19th are your best bets for clean, powerful surf. Saturday the 18th is the biggest, but it's a beast. This is a reef, so it holds the long period well. Expect a crowd when it's on.
Stay sharp out there.
Rusty.
Short Range ForecastSome drizzle, heaviest during Thu night. Very mild (max 17°C on Thu night, min 14°C on Thu night). Wind will be generally light. | Days 5-7 Weather SummarySome drizzle, heaviest during Wed afternoon. Very mild (max 19°C on Wed afternoon, min 11°C on Tue morning). Winds increasing (light winds from the SSW on Mon afternoon, fresh winds from the NNE by Wed morning). | ||||||||||||||||||||
Friday 10 | Saturday 11 | Sunday 12 | Monday 13 | Tuesday 14 | Wednesday 15 | Thu 16 | |||||||||||||||
Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | |
Swell Height Map |  |  |  |  |  |  |  |  | |||||||||||||
Wave Height (m) Direction Period (s) | WSW 13 | SW 13 | SW 11 | SW 12 | SW 13 | SW 13 | SW 13 | SW 14 | SW 17 | SW 18 | SW 16 | SW 16 | SW 15 | SW 15 | SW 14 | SW 14 | SW 13 | SW 16 | WSW 16 | WSW 14 | WSW 14 |
Wave Graph  | |||||||||||||||||||||
 kJ | 1398 | 1619 | 836 | 1070 | 2354 | 3208 | 2600 | 3306 | 6293 | 7992 | 6633 | 5824 | 4797 | 4462 | 3468 | 2310 | 1308 | 2831 | 4161 | 3651 | 2913 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-on | cross | cross | cross | cross | cross-on | cross-on | cross-on | cross-on | cross | cross-on | off | cross-off | cross-off | cross-off | cross-off | cross | cross-on | cross-on | cross-on |
High Tide | 6:16AM0.99m | 7:00AM1.06m | 7:43AM1.12m | 8:26AM1.15m | 9:06AM1.14m | 9:44AM1.10m | 10:17AM1.03m | ||||||||||||||
Low Tide | 3:57PM0.31m | 4:37PM0.26m | 5:18PM0.23m | 5:59PM0.24m | 6:39PM0.27m | 7:15PM0.32m | 7:45PM0.38m | ||||||||||||||
 |  |  |  | | | |  | |  | | |  | | | | |  |  |  | | |
 | — | 7:24 | — | — | 7:24 | — | — | 7:24 | — | — | 7:22 | — | — | 7:22 | — | — | 7:22 | — | — | 7:22 | — |
 | 5:24 | — | 5:25 | — | — | 5:25 | — | — | 5:27 | — | — | 5:27 | — | — | 5:28 | — | — | 5:28 | — | — | 5:29 |
mm | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 4 | 3 | 2 |
Temp °C | 17 | 14 | 14 | 15 | 15 | 15 | 14 | 16 | 15 | 14 | 14 | 15 | 14 | 12 | 15 | 16 | 18 | 19 | 19 | 18 | 18 |
Feels °C | 13 | 11 | 10 | 11 | 11 | 11 | 11 | 13 | 12 | 11 | 12 | 13 | 12 | 10 | 12 | 13 | 11 | 13 | 17 | 15 | 16 |
Swell 1 Height (m) Direction Period (s) | WSW 13 | SW 13 | WSW 14 | SW 12 | SW 13 | SW 13 | SW 13 | SW 14 | SW 17 | SW 18 | SW 16 | SW 16 | SW 15 | SW 15 | SW 14 | SW 14 | SW 13 | SW 16 | WSW 16 | WSW 14 | WSW 14 |
| kJ | 1398 | 1619 | 492 | 1070 | 2354 | 3208 | 2600 | 3306 | 6293 | 7992 | 6633 | 5824 | 4797 | 4462 | 3468 | 2310 | 1308 | 2831 | 4161 | 3651 | 2913 |
Swell 2 Height (m) Direction Period (s) | — | WSW 14 | — | W 13 | SW 22 | — | SW 17 | SW 19 | SW 18 | — | — | — | — | — | — | — | SW 18 | WSW 13 | NNW 7 | NNW 7 | WNW 13 |
| kJ | — | 939 | — | 3 | 18 | — | 2068 | 1295 | 1499 | — | — | — | — | — | — | — | 915 | 198 | 135 | 60 | 16 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | SW 22 | — | — | — | — | — | — | — | WNW 14 | WNW 14 | WNW 13 | WNW 13 | S 12 |
| kJ | — | — | — | — | — | — | — | — | 389 | — | — | — | — | — | — | — | 18 | 18 | 17 | 16 | 27 |
Wind waves Height (m) Direction Period (s) | SW 11 | — | SW 11 | — | — | — | — | — | — | — | — | — | — | — | — | NNE 4 | N 7 | N 7 | — | — | NNW 6 |
| kJ | 493 | — | 836 | — | — | — | — | — | — | — | — | — | — | — | — | 20 | 380 | 408 | — | — | 30 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 64 | 2 | 20 | 20 | 1 | 20 | 1 | 2 | 2 | 1 | 1 | 2 | 0 | 0 | 0 | 44 | 754 | 221 | 86 | 202 | 53 |
Best forecast wave conditions in Margaret River | |||||||||||||||||||||
Best forecast wave conditions in Australia | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
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.
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 16 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