Surf Forecasts:
Cobblestones surf forecast from 25 Aug 2026:
- Best quality surf: Saturday 29 Aug, 11PM (local time) - 11ft (3.5m), 19s period, SW swell with cross-offshore winds.
- Most powerful swell: Wednesday 26 Aug, 5PM (local time) - 16ft (5.0m), 17s period, WSW swell with 14,571 kJ wave energy.
- Next surfable swell (1★+): Saturday 29 Aug, 2PM (local time) - 10ft (3.0m), 17s 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 29) at 2PM. The primary swell is predicted to be 3.0m and 17s period with a secondary swell of 0.6m and 5s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Cobblestones in the next 16 days are 5.0m 17s and forecast to arrive on Wednesday (Aug 26) at 5PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.9m 7s period and expected on Tuesday (Aug 25) at 8PM.
| Wave Type | Time (AWST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2PM (Sat 29th Aug) | 10ft (3.0m) 17s |
| Best Surf | 11PM (Sat 29th Aug) | 11ft (3.5m) 19s |
| Most Powerful | 5PM (Wed 26th Aug) | 16ft (5.0m) 17s |
Table - best surf conditions forecast for Cobblestones over the next 16 days.
The Lowdown
Alright, folks, Rusty here. Let's break this down. The forecast for Cobblestones over the next couple of weeks is a real mixed bag. We've got some big, powerful groundswell coming, but you've got to be sharp and pick your windows.
This is a reef break for advanced surfers only. It's consistent, and it loves a solid SSW swell. The water temp right now is about 66°, which is a touch warmer than normal for the season, so you might be alright with a slightly lighter suit.
Don't bother paddling out on Tuesday the 25th. It's a total loss. Rain, a 22 mph cross-on breeze, and junky surf. Stay on the beach.
Things fire up from Wednesday the 26th. We're looking at a massive, long-period groundswell from the WSW. We're talking 16-foot waves with a 17 to 18-second period. The combined energy is enormous, reading well over 14,000. This is deep-ocean power. The catch? The wind blows cross-shore or cross-on from Wednesday through Friday, keeping things lumpy and rough. It's doable for the hard core, but it won't win any beauty contests. And at over 8 feet, this is strictly big-wave territory for experts only.
Your absolute standout window is Saturday the 29th. That's the one to circle. The swell drops to a still-very-serious 10 feet from the SW, with a 16 to 17-second period. But the big win is the wind. Saturday afternoon goes glassy, with a light 3 mph offshore breeze keeping the surface *clean*. The combined swell energy is a powerful 5,568. This is the session to target – a proper, clean, heavy groundswell for the seasoned crew. Sunday morning is also looking clean with a light 6 mph offshore, but the wind shifts that afternoon and things get a little bumpy.
After that, it's a messy week. From Sunday the 31st right through the first few days of September, we've got onshore and cross-on winds mixing with a solid 8 to 13-foot swell. It's not great for a clean paddle session.
Keep a note for around the 7th of September. Monday and Tuesday of that week show another big pulse of long-period SSW groundswell, with energy readings over 10,000 and wave heights back up to 15 feet on Tuesday the 7th. The winds look lighter, with a gentle breeze and cleaner conditions on Monday afternoon. That's a promising long-range look – something to keep in the back of your mind.
The rest of that second week looks mostly small, messy, or blown out. It’s going to be all about waiting for the right moment.
Short Range ForecastModerate rain (total 16mm), heaviest on Wed afternoon. Very mild (max 18°C on Tue afternoon, min 13°C on Wed afternoon). Winds decreasing (strong winds from the NW on Tue afternoon, light winds from the SSW by Wed morning). | Days 5-7 Weather SummaryMostly dry. Very mild (max 19°C on Sat afternoon, min 10°C on Fri night). Wind will be generally light. | |||||||||||||||||||
Tue 25 | Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | Sunday 30 | Monday 31 | ||||||||||||||
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) | WSW 13 | WSW 15 | WSW 18 | WSW 17 | WSW 16 | SW 15 | SW 14 | SW 13 | SW 12 | SW 12 | SSW 11 | SW 16 | SW 17 | SW 18 | SW 16 | WSW 16 | WSW 15 | WSW 17 | WSW 16 | WSW 15 |
Wave Graph  | ||||||||||||||||||||
 kJ | 3499 | 6930 | 14437 | 14571 | 10127 | 7031 | 5421 | 2873 | 1264 | 822 | 681 | 1871 | 5562 | 7610 | 5419 | 4312 | 3246 | 3354 | 2997 | 7947 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-on | cross | cross | cross | cross | cross-off | cross | cross | cross-off | cross-off | cross-off | off | cross-off | cross-on | on | on | cross-on | cross |
High Tide | 8:07AM0.91m | 8:49AM0.90m | 11:28PM0.59m | 9:30AM0.85m | 11:07PM0.60m | 10:11AM0.79m | 11:06PM0.63m | 10:54AM0.71m | 11:15PM0.67m | 11:39AM0.61m | 11:33PM0.73m | |||||||||
Low Tide | 4:29PM0.31m | 4:41PM0.32m | 4:53PM0.34m | 2:29AM0.56m | 5:05PM0.37m | 3:35AM0.51m | 5:13PM0.41m | 4:35AM0.46m | 5:13PM0.46m | 5:41AM0.44m | 4:55PM0.49m | |||||||||
 |  | |  |  |  | |  |  | |  | | | | | | | | |  | |
 | — | — | 6:47 | — | — | 6:45 | — | — | 6:43 | — | — | 6:43 | — | — | 6:41 | — | — | 6:39 | — | — |
 | 5:55 | — | — | 5:57 | — | — | 5:58 | — | — | 5:58 | — | — | 5:59 | — | — | 6:00 | — | — | 6:00 | — |
mm | 2 | 5 | 1 | 5 | 3 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 18 | 17 | 15 | 13 | 13 | 15 | 14 | 13 | 14 | 15 | 12 | 15 | 19 | 16 | 17 | 17 | 16 | 17 | 17 | 13 |
Feels °C | 13 | 12 | 12 | 9 | 8 | 8 | 7 | 7 | 8 | 9 | 7 | 11 | 17 | 14 | 16 | 15 | 16 | 14 | 13 | 8 |
Swell 1 Height (m) Direction Period (s) | WSW 13 | WSW 15 | WSW 18 | WSW 17 | WSW 16 | SW 15 | SW 14 | SW 13 | SW 12 | SW 12 | SSW 11 | SW 16 | SW 17 | SW 18 | SW 16 | WSW 16 | WSW 15 | WSW 17 | WSW 16 | WSW 15 |
| kJ | 3499 | 6930 | 14437 | 14571 | 10127 | 7031 | 5421 | 2873 | 1264 | 822 | 681 | 1871 | 5562 | 7610 | 5419 | 4312 | 3246 | 3354 | 2997 | 7947 |
Swell 2 Height (m) Direction Period (s) | W 24 | WSW 22 | — | — | — | — | — | SW 21 | WSW 20 | SW 20 | SW 18 | SW 19 | SSE 6 | — | — | — | — | — | — | — |
| kJ | 11 | 363 | — | — | — | — | — | 18 | 39 | 99 | 255 | 1460 | 6 | — | — | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | S 12 | W 7 | — | — | — | — | — | — | SW 26 | WSW 24 | SW 21 | S 10 | — | — | — | — | — | — | — | — |
| kJ | 3 | 109 | — | — | — | — | — | — | 25 | 55 | 365 | 7 | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | NW 7 | — | — | — | — | — | SSE 6 | — | SSE 6 | SSE 6 | SE 6 | — | SE 5 | — | — | — | — | WNW 6 | WSW 9 | — |
| kJ | 331 | — | — | — | — | — | 135 | — | 101 | 141 | 76 | — | 30 | — | — | — | — | 240 | 1275 | — |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 251 | 201 | 20 | 64 | 1 | 1340 | 1689 | 1 | 1 | 64 | 1 | 1 | 0 | 0 | 0 | 38 | 1 | 2 | 2 | 1 |
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.
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