
Surf Forecasts:
Cobblestones surf forecast from 11 Aug 2026:
- Best quality surf: Tuesday 18 Aug, 8PM (local time) - 13ft (4.0m), 16s period, W swell with cross-shore winds.
- Most powerful swell: Monday 17 Aug, 2PM (local time) - 15ft (4.5m), 17s period, WSW swell with 11,725 kJ wave energy.
- Next surfable swell (1★+): Thursday 13 Aug, 2AM (local time) - 13ft (4.0m), 15s 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 Thursday (Aug 13) at 2AM. The primary swell is predicted to be 4.0m and 15s period. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Cobblestones in the next 16 days are 4.5m 17s and forecast to arrive on Monday (Aug 17) at 2PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.5m 8s period and expected on Wednesday (Aug 19) at 2AM.
| Wave Type | Time (AWST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2AM (Thu 13th Aug) | 13ft (4.0m) 15s |
| Best Surf | 8PM (Tue 18th Aug) | 13ft (4.0m) 16s |
| Most Powerful | 2PM (Mon 17th Aug) | 15ft (4.5m) 17s |
Table - best surf conditions forecast for Cobblestones over the next 16 days.
The Lowdown
Alright, folks, Rusty here. Let’s get into it. The only game in town for the next 16 days is Cobblestones. This is an advanced reef break that’s exposed to the south-west, and it’s going to be a serious show. The water temp is about average for the time of year, nothing unusual there.
The forecast kicks off Wednesday morning, August 12th, with a solid 13.1ft groundswell out of the SW, period at 15 seconds. The wind is on the nose, so it’s going to be a bit of a grind—marginal conditions, but there’s serious energy in the water (combined energy of 7399). It’s a big, powerful swell, but the wind is messing with the surface. Not the best for a paddle, but the sheer size is impressive.
Thursday, August 13th, is where things start to get interesting. Morning sees a 13.1ft SW swell with a 16-second period, and a light NNW cross-shore breeze. The combined energy jumps to 8804, and the wave state is described as “light cross-shore with small crossing wind ripples.” It’s still a big swell, but the wind is much better. This is a solid window for experienced surfers. The afternoon holds similar size with a 17-second period and light SW onshore, still a good option.
Friday, August 14th, is the standout. The morning has a 11.5ft SW swell, 16-second period, and a light NNE cross-offshore breeze. The combined energy is 6461, and the conditions are “clean.” This is “exceptional surf conditions for expert surfers.” The wind is nearly perfect, the swell is big but manageable, and the direction is dialed in. This is the one to circle. The afternoon sees the wind shift to a light cross-onshore, knocking the quality down a bit.
Saturday, August 15th, the morning is clean but the wind picks up to 25 km/h from the north, cross-off, with a 8.2ft WSW swell. It’s clean but the wind is breezy. The afternoon is better, with a 8.2ft SW swell and a lighter north wind. It’s “excellent surf conditions for experienced surfers,” but the size is dropping.
Sunday, August 16th, the morning has a 11.5ft WSW swell, 15-second period, and a moderate north-northeast cross-off breeze. The combined energy is 4842, and it’s clean. A solid day, but the wind is a bit stronger.
Monday, August 17th, is a write-off. Strong onshore winds from the WSW, 35-40 km/h, and the swell is 13.1-14.8ft. The combined energy is huge (9166 and 11312), but it’s “poor surf conditions.” Not worth it.
Tuesday, August 18th, the wind eases a bit to a moderate NNW cross-shore, with a 13.1ft WSW swell. The combined energy is 8998, but the surface is lumpy with a cross-chop in the afternoon. It’s marginal, but there’s power.
Wednesday, August 19th, is a monster. A 19.7ft WSW swell with a 15-second period, combined energy of 29407. The wind is strong onshore, and the forecast says it’s “too big for this break.” This is for experts only, and even then, it’s a risk. The energy is off the charts.
Thursday, August 20th, is another standout. The morning has a 14.8ft WSW swell, 15-second period, and a light NNE cross-offshore breeze. The combined energy is 9552, and the conditions are “exceptional surf conditions for expert surfers.” The wind is clean, the swell is big, and it’s a proper session. This is the second top pick.
Friday, August 21st, is back to poor conditions. Strong onshore winds from the west, 40-45 km/h, with a 11.5ft SW swell. The combined energy is around 4700, but it’s messy.
Saturday, August 22nd, the morning has a 14.8ft WSW swell, 18-second period, and a moderate onshore wind. The combined energy is 13120, but the wind is on the nose. The afternoon is a write-off with strong onshore wind.
Sunday, August 23rd, the wind shifts to a moderate cross-onshore, with a 11.5ft WSW swell. It’s choppy and marginal.
Monday, August 24th, the wind goes cross-offshore from the SE, with a 9.8ft WSW swell. The combined energy is 3479, and it’s clean. A decent option for the second week.
Tuesday, August 25th, the swell drops to 4.9-5.6ft, with a strong cross
Short Range ForecastMostly dry. Very mild (max 16°C on Fri afternoon, min 11°C on Thu morning). Wind will be generally light. | Days 5-7 Weather SummaryLight rain (total 6mm), mostly falling on Mon morning. Very mild (max 18°C on Sat afternoon, min 14°C on Fri night). Winds increasing (calm on Fri night, fresh winds from the WSW by Mon morning). | ||||||||||||||||||
Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | Monday 17 | ||||||||||||||
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 15 | SW 15 | SW 15 | SW 16 | SW 17 | SW 16 | SW 16 | SW 15 | SW 14 | WSW 14 | SW 13 | WSW 13 | WSW 15 | WSW 14 | WSW 15 | WSW 17 | WSW 17 | WSW 16 |
Wave Graph | |||||||||||||||||||
9483 | 7377 | 6892 | 7500 | 8804 | 9972 | 7675 | 6461 | 4982 | 3810 | 2816 | 2209 | 1657 | 4702 | 3985 | 3305 | 9166 | 11312 | 8170 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | on | on | glassy | cross | on | cross-off | cross-off | cross-on | off | cross-off | cross-off | off | cross-off | cross-off | cross-on | on | cross-on | glassy |
High Tide | 9:17AM0.98m | 9:55AM0.92m | 10:26AM0.82m | 00:30AM0.56m | 10:47AM0.72m | 00:00AM0.59m | 10:48AM0.62m | 11:55PM0.64m | 10:00AM0.54m | 00:10AM0.70m | |||||||||
Low Tide | 6:03PM0.29m | 6:23PM0.35m | 6:25PM0.42m | 3:53AM0.53m | 6:01PM0.46m | 5:05AM0.52m | 5:10PM0.47m | 6:30AM0.52m | 4:12PM0.44m | ||||||||||
— | 7:03 | — | — | 7:01 | — | — | 7:01 | — | — | 6:58 | — | — | 6:58 | — | — | 6:56 | — | — | |
5:46 | — | 5:46 | — | — | 5:47 | — | — | 5:49 | — | — | 5:49 | — | — | 5:50 | — | — | 5:51 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 5 | — | — |
Temp °C | 14 | 14 | 14 | 14 | 13 | 14 | 14 | 14 | 16 | 15 | 17 | 18 | 17 | 16 | 18 | 18 | 15 | 15 | 14 |
Feels °C | 9 | 11 | 11 | 12 | 12 | 12 | 12 | 12 | 14 | 14 | 13 | 14 | 17 | 11 | 13 | 15 | 8 | 8 | 9 |
Swell 1 Height (m) Direction Period (s) | SW 15 | SW 15 | SW 15 | SW 15 | SW 16 | SW 17 | SW 16 | SW 16 | SW 15 | SW 14 | WSW 14 | SW 13 | WSW 13 | WSW 15 | WSW 14 | WSW 15 | — | — | WSW 16 |
9483 | 7377 | 6892 | 7500 | 8804 | 9972 | 7675 | 6461 | 4982 | 3810 | 2816 | 2209 | 1657 | 4702 | 3985 | 3305 | — | — | 8170 | |
Swell 2 Height (m) Direction Period (s) | — | SW 24 | SW 22 | — | — | — | — | — | — | — | — | — | WSW 16 | SW 23 | SW 21 | WSW 19 | — | — | — |
— | 22 | 163 | — | — | — | — | — | — | — | — | — | 1390 | 140 | 664 | 2023 | — | — | — | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | N 4 | — | — | N 4 | N 5 | WSW 17 | WSW 17 | — |
— | — | — | — | — | — | — | — | — | — | — | 16 | — | — | 28 | 71 | 9166 | 11312 | — | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 2 | 2 | 2 | 0 | 15 | 2 | 0 | 0 | 2 | 0 | 53 | 0 | 0 | 165 | 53 | 53 | 359 | 2 | 0 |
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)
Latest Updates
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.











