
Surf Forecasts:
Cobblestones surf forecast from 3 Aug 2026:
- Best quality surf: Saturday 8 Aug, 8AM (local time) - 20ft (6.0m), 14s period, SW swell with cross-onshore winds.
- Most powerful swell: Saturday 8 Aug, 5PM (local time) - 20ft (6.0m), 16s period, SW swell with 18,337 kJ wave energy.
- Next surfable swell (1★+): Saturday 8 Aug, 8AM (local time) - 20ft (6.0m), 14s period with SW swell.
Best Forecast Surf Conditions for Cobblestones this week:
The surf forecast for Cobblestones over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Saturday (Aug 08) at 8AM. The primary swell is predicted to be 6.0m and 14s period. The wind is predicted to be cross-onshore as the swell arrives.
The most powerful waves expected at Cobblestones in the next 16 days are 6.0m 16s and forecast to arrive on Saturday (Aug 08) at 5PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.0m 4s period and expected on Monday (Aug 03) at 11AM.
| Wave Type | Time (AWST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8AM (Sat 8th Aug) | 20ft (6.0m) 14s |
| Best Surf | 8AM (Sat 8th Aug) | 20ft (6.0m) 14s |
| Most Powerful | 5PM (Sat 8th Aug) | 20ft (6.0m) 16s |
Table - best surf conditions forecast for Cobblestones over the next 16 days.
The Lowdown
G'day, it's Rusty here. We've got a single standout spot on the cards for the next 16 days: Cobblestones. This is a proper advanced reef break, so not for the faint-hearted. The water is sitting at a notably warm 68°, which is over 4° warmer than usual for this time of year – a real treat if you're going in without a thick wetsuit.
The forecast kicks off on Monday the 3rd of August with a solid 6ft SW groundswell, but it's pretty messy. A moderate cross-offshore breeze in the morning won't save it from being a bit marginal, and the afternoon gets worse with a cross-shore chop. The combined energy is moderate (1455 in the morning, 1671 in the afternoon), but the quality just isn't there.
Tuesday the 4th sees a big jump in size to 12ft, but the wind is onshore and strong. The morning is a messy onshore mess, and the afternoon is a total write-off with a cross-onshore breeze. This is big, powerful stuff (combined energy hitting 8079 in the morning) but it's blown out.
Wednesday the 5th is still massive, with 16ft SW swells and a very long 16-second period. This is serious groundswell energy (over 11,000 combined). The wind is a light cross-onshore, so it's not perfect, but for a reef break, it could be holding some big, heavy lines. Be aware, this is expert-only territory.
Thursday the 6th drops slightly to 13ft, and the wind goes cross-shore, which cleans things up a bit. Still a powerful, long-period swell (8,317 combined energy in the morning), but it's a big, challenging wave.
Friday the 7th is a write-off. Onshore winds and a risk of thunderstorms make it a complete no-go.
Now, here's where it gets interesting. Saturday the 8th of August is a standout. The swell is a massive 20ft from the SW, with a 15-16 second period. The combined energy is through the roof (16,428 in the morning, 18,337 in the afternoon). The wind is a cross-onshore, but the data says the wind and tide are favorable. However, this is way too big. It's a "giant day" for absolute experts only. If you're not charging, give it a wide berth.
Sunday the 9th is back to 16ft, but with onshore winds again, making it a messy, blown-out day.
Monday the 10th has a 13-15ft SW swell, but a fresh cross-shore breeze (19 mph) makes it lumpy. The afternoon has a 16-second period and huge combined energy (17,959), but the wind is still a problem.
The real highlight of the entire forecast is Tuesday the 11th of August. We've got a 18ft SW groundswell (16-second period, 14,566 combined energy) with a light cross-onshore breeze. The score is high, and the comment says "marginal", but in the context of a big, powerful reef break, this is the cleanest big-wave window. This is the one to circle for the experienced crew.
Wednesday the 12th is a different story. The swell drops to 13ft, and the morning sees a 3 mph cross-offshore breeze from the SE. It's glassy clean. The comment calls it "exceptional surf conditions for expert surfers". This is a much more manageable size, with a long 13-second period, and it's going to be a beautiful, clean day at the reef.
Thursday the 13th morning is a monster. 15ft with a 19-second period! That's a very long period groundswell. The combined energy is 15,586, and the wind is offshore from the ENE. It's clean, but it's going to be a big, powerful, straight-breaking wave. For a reef break, it'll be a freight train. This is a big, heavy day for the elite.
Friday the 14th of August is another standout. The morning has 12ft and a moderate offshore breeze from the NE. The afternoon is the gem: 16ft SW swell with a 16-second period, a light offshore breeze, and a score of 9. The comment says "exceptional surf conditions for expert surfers". This is clean, powerful, and consistent. This is the best session of the entire run.
Saturday the 15th has 15ft with a clean cross-offshore breeze, but the energy is a bit lower. Still a solid day.
Sunday the 16th sees the swell drop to 10ft, but a fresh breeze picks up.
The final few days of the forecast (Monday 17th and Tuesday 18th) are ruined by onshore winds and rain, so the run ends with a whimper.
Overall, the best bets are Friday the 14th of August for the clean, powerful combo, and the Tuesday the 11th of August for the biggest, cleanest swell. The Thursday the 13th is a massive, long-period groundswell that will be a sight to see. If you're an expert, you've got some serious options.
Rusty.
Short Range ForecastHeavy rain (total 26mm), heaviest during Mon night. Very mild (max 18°C on Mon afternoon, min 12°C on Mon morning). Winds decreasing (fresh winds from the WSW on Mon night, light winds from the NW by Wed afternoon). | Days 4-6 Weather SummaryModerate rain (total 19mm), heaviest on Fri morning. Very mild (max 17°C on Thu morning, min 12°C on Fri night). Winds increasing (light winds from the WNW on Thu night, strong winds from the SW by Fri night). | ||||||||||||||||||||
Monday 3 | Tuesday 4 | Wednesday 5 | Thursday 6 | Friday 7 | Saturday 8 | Sunday 9 | |||||||||||||||
AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map | |||||||||||||||||||||
Wave Height (m) Direction Period (s) | SW 15 | SW 16 | SW 15 | WSW 17 | WSW 16 | WSW 16 | SW 16 | WSW 16 | WSW 16 | WSW 16 | WSW 16 | WSW 16 | WSW 15 | WSW 15 | WSW 15 | SW 15 | SW 16 | SW 16 | SW 16 | SW 15 | SW 14 |
Wave Graph | |||||||||||||||||||||
1380 | 1664 | 1889 | 8079 | 6650 | 5492 | 11522 | 11797 | 10516 | 8317 | 7004 | 7520 | 6340 | 7582 | 12359 | 16428 | 18337 | 16508 | 11184 | 8677 | 6207 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross | on | on | cross-on | cross-on | cross-on | cross-on | cross | cross | cross | cross-on | on | on | cross-on | cross-on | cross-on | on | on | on | on |
High Tide | 11:43AM0.70m | 1:29AM0.72m | 11:27AM0.59m | 2:06AM0.78m | 3:03AM0.84m | 4:24AM0.90m | 5:45AM0.95m | 6:51AM1.00m | |||||||||||||
Low Tide | 6:25PM0.52m | 9:04AM0.58m | 5:15PM0.53m | 2:30PM0.46m | 2:35PM0.36m | 3:09PM0.28m | 3:46PM0.22m | 4:24PM0.20m | |||||||||||||
7:11 | — | — | 7:09 | — | — | 7:09 | — | — | 7:07 | — | — | 7:07 | — | — | 7:07 | — | — | 7:05 | — | — | |
— | 5:40 | — | — | 5:42 | — | — | 5:42 | — | — | 5:43 | — | — | 5:44 | — | — | 5:45 | — | — | 5:45 | — | |
mm | — | — | 18 | — | — | — | 2 | 2 | 4 | — | — | 5 | 7 | 3 | 4 | — | — | — | — | 1 | 2 |
Temp °C | 16 | 18 | 16 | 14 | 14 | 16 | 16 | 16 | 16 | 17 | 17 | 17 | 16 | 15 | 14 | 13 | 13 | 14 | 15 | 15 | 16 |
Feels °C | 12 | 14 | 10 | 9 | 8 | 11 | 12 | 14 | 14 | 13 | 13 | 14 | 11 | 10 | 6 | 3 | 5 | 9 | 11 | 10 | 9 |
Swell 1 Height (m) Direction Period (s) | SW 15 | SW 16 | SW 15 | WSW 17 | WSW 16 | WSW 16 | SW 16 | WSW 16 | WSW 16 | WSW 16 | WSW 16 | WSW 16 | WSW 15 | — | — | — | SW 16 | SW 16 | SW 16 | SW 15 | SW 14 |
1380 | 1664 | 1889 | 8079 | 6650 | 5492 | 11522 | 11797 | 10516 | 8317 | 7004 | 7520 | 6340 | — | — | — | 18337 | 16508 | 11184 | 8677 | 6207 | |
Swell 2 Height (m) Direction Period (s) | S 8 | SE 13 | SW 20 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | SW 21 | SW 21 | SW 20 |
68 | 7 | 1145 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 548 | 458 | 634 | |
Swell 3 Height (m) Direction Period (s) | SE 13 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
7 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | N 4 | NNW 4 | W 7 | — | — | — | — | — | — | — | — | — | — | WSW 15 | WSW 15 | SW 15 | — | — | — | — | — |
38 | 43 | 220 | — | — | — | — | — | — | — | — | — | — | 7582 | 12359 | 16428 | — | — | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 53 | 53 | 251 | 359 | 251 | 201 | 2 | 216 | 86 | 179 | 159 | 2 | 251 | 411 | 2004 | 1689 | 2561 | 35 | 2 | 359 | 359 |
Best forecast wave conditions in Margaret River | |||||||||||||||||||||
Best forecast wave conditions in Australia | |||||||||||||||||||||
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Information about the Cobblestones Surf forecast
The above surf forecast table for Cobblestones provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Cobblestones can be found by selecting the local surf guide option on the grey menu. Our Cobblestones 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 (Cobblestones) 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 Cobblestones 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.
Cobblestones 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.











