Surf Forecasts:
Big Rock surf forecast from 6 Jul 2026:
- Best quality surf: Sunday 12 Jul, 11PM (local time) - 13ft (4.0m), 18s period, SW swell with cross-offshore winds.
- Most powerful swell: Sunday 12 Jul, 11PM (local time) - 13ft (4.0m), 18s period, SW swell with 9,870 kJ wave energy.
- Next surfable swell (1★+): Monday 6 Jul, 11PM (local time) - 13ft (4.0m), 16s period with WSW 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 Monday (Jul 06) at 11PM. The primary swell is predicted to be 4.0m and 16s period. 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 4.0m 18s and forecast to arrive on Sunday (Jul 12) at 11PM. Winds are predicted to be cross-offshore at the time the swell arrives.
| Wave Type | Time (AWST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11PM (Mon 6th Jul) | 13ft (4.0m) 16s |
| Best Surf | 11PM (Sun 12th Jul) | 13ft (4.0m) 18s |
| Most Powerful | 11PM (Sun 12th Jul) | 13ft (4.0m) 18s |
Table - best surf conditions forecast for Big Rock over the next 16 days.
Updates in hr min s Forecast update imminent
Alright, Rusty here. Let’s have a look at what’s on the cards for Big Rock.
We’ve got a solid run of surf on the way, kicking off Tuesday the 7th of July and sticking around for a good stretch. The early action comes from a powerful SW groundswell with a very long period of 16 seconds, pumping in at 11.5 ft. The combined energy is a beast (6014) – this is heavy, serious ocean energy. Tuesday morning looks glassy with a light ESE breeze making for clean conditions, but those waves are big. At 11.5 ft and packing that kind of punch, this is strictly for the experienced crew; beginners would be in over their heads. The water temp is around average for this time of year.
By Wednesday the 8th, the swell holds strong at 11.5 ft from the WSW, still with a very long period (16 seconds). The morning is a bit messy with a light cross-onshore, but Wednesday afternoon turns glassy and perfect for the experts. The energy is still massive (5241).
Thursday the 9th sees the swell back off a touch to 9.8 ft but the cross-onshore wind picks up, making things choppy. It’s a bit of a write-off.
Friday the 10th and Saturday the 11th offer some cleaner windows. Friday morning brings a 6.6 ft SW swell with a cross-offshore breeze and clean lines, good for experienced surfers. Saturday morning is looking choice – dead calm, glassy conditions and a 7.5 ft SW swell with that long period. The energy is still moderate-strong (2022), a great window for a confident intermediate.
Sunday the 12th is a standout. The morning has a clean 8.2 ft SW swell with a cross-offshore breeze, and then Sunday afternoon delivers a cracking 7.9 ft SW groundswell with a super long period of 17 seconds and a clean cross-off wind. The energy is up there (5104) – this is the best combination of size, quality, and conditions of the whole outlook. Expect a few others in the water though, as crowds are sometimes an issue here.
Monday the 13th keeps the wave train rolling with an 11.5 ft SW swell (16 seconds) and clean offshores. Again, expert territory.
From Tuesday the 14th through to Monday the 20th, the swell sticks around in the 6.6 ft to 8.2 ft range, but the winds get messy. Midweek (15th and 16th July) turns ugly with strong onshore winds and rain showing up, making a complete mess of things. Thursday the 16th looks especially grim with 14.8 ft of WSW swell and howling onshores – that’s kite-surfing territory, not paddle.
There’s a notable gap of poor conditions from the 15th through the 21st. But, looking ahead to Sunday the 19th of July, there’s a glimmer. The morning turns glassy again with a 7.5 ft SW swell and clean conditions, giving the experienced crew a sneaky clean session amidst the chaos. By Monday the 20th it’s back onshore, and Tuesday the 21st stays lumpy. The very last entry on Wednesday the 22nd shows a massive 14.8 ft SW swell with a 17-second period (energy reading 11282!), but it’s pinned under a fresh cross-onshore – one for the tow crew or the kites only.
Best call? Get on Sunday the 12th. That afternoon session with the 7.9 ft SW, 17-second period groundswell and clean offshores is the pick of the run. Monday 13th morning is another strong expert option.
Short Range ForecastLight rain (total 2mm), mostly falling on Wed night. Very mild (max 17°C on Wed afternoon, min 13°C on Tue night). Wind will be generally light. | Days 5-7 Weather SummarySome drizzle, heaviest during Thu night. Very mild (max 16°C on Thu night, min 11°C on Fri night). Wind will be generally light. | ||||||||||||||||||||
Tuesday 7 | Wednesday 8 | Thursday 9 | Friday 10 | Saturday 11 | Sunday 12 | Mon 13 | |||||||||||||||
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 15 | SW 16 | SW 15 | SW 15 | WSW 16 | WSW 15 | WSW 16 | WSW 14 | WSW 14 | WSW 13 | WSW 13 | WSW 14 | SW 11 | SW 14 | SW 13 | SW 13 | SW 13 | SW 17 | SW 17 | SW 16 | SW 16 |
Wave Graph  | |||||||||||||||||||||
 kJ | 6924 | 5998 | 4356 | 2612 | 5576 | 5241 | 4918 | 3151 | 2586 | 1338 | 1317 | 597 | 739 | 2004 | 2221 | 2187 | 2158 | 3443 | 9536 | 5973 | 4598 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross-off | off | cross-on | glassy | on | cross-on | cross-on | cross-off | cross-off | cross | cross-off | glassy | cross | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off |
High Tide | 4:47AM0.78m | 5:02AM0.84m | 5:36AM0.92m | 6:16AM0.99m | 7:00AM1.06m | 7:43AM1.12m | 8:26AM1.15m | ||||||||||||||
Low Tide | 8:08PM0.57m | 6:31PM0.59m | 3:04PM0.51m | 3:22PM0.40m | 3:57PM0.31m | 4:37PM0.26m | 5:18PM0.23m | 5:59PM0.24m | |||||||||||||
 |  |  | | |  |  | | | | | | | | | | | | | | | |
 | — | 7:24 | — | — | 7:24 | — | — | 7:24 | — | — | 7:24 | — | — | 7:24 | — | — | 7:24 | — | — | 7:22 | — |
 | 5:23 | — | 5:23 | — | — | 5:24 | — | — | 5:24 | — | — | 5:25 | — | — | 5:25 | — | — | 5:27 | — | — | 5:27 |
mm | — | — | — | — | — | — | 2 | — | — | 1 | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 15 | 14 | 16 | 14 | 16 | 17 | 17 | 16 | 17 | 16 | 15 | 15 | 13 | 12 | 14 | 14 | 14 | 16 | 14 | 13 | 15 |
Feels °C | 12 | 11 | 13 | 11 | 16 | 17 | 16 | 14 | 13 | 15 | 13 | 12 | 10 | 12 | 11 | 12 | 13 | 14 | 11 | 11 | 12 |
Swell 1 Height (m) Direction Period (s) | WSW 15 | SW 16 | SW 15 | SW 15 | WSW 16 | WSW 15 | WSW 16 | WSW 14 | WSW 14 | WSW 13 | WSW 13 | SW 11 | SW 11 | SW 14 | SW 13 | SW 13 | SW 13 | SW 17 | SW 17 | SW 16 | SW 16 |
| kJ | 6924 | 5998 | 4356 | 2612 | 5576 | 5241 | 4918 | 3151 | 2586 | 1338 | 1317 | 530 | 739 | 2004 | 2221 | 2187 | 2158 | 3443 | 9536 | 5973 | 4598 |
Swell 2 Height (m) Direction Period (s) | — | SSE 6 | — | WSW 22 | — | — | — | — | SSW 12 | SSW 11 | SSW 11 | WSW 14 | W 13 | SW 21 | — | SW 22 | SW 19 | SW 13 | — | — | — |
| kJ | — | 16 | — | 45 | — | — | — | — | 436 | 286 | 492 | 597 | 3 | 18 | — | 229 | 1745 | 1645 | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | WNW 10 | WNW 9 | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 19 | 16 | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | SE 6 | SE 6 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | 11 | 14 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 0 | 10 | 0 | 2 | 2 | 2 | 0 | 0 | 17 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 20 |
Best forecast wave conditions in Margaret River | |||||||||||||||||||||
Best forecast wave conditions in Australia | |||||||||||||||||||||
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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 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.
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