Surf Forecasts:
Cobblestones surf forecast from 26 Aug 2026:
- Best quality surf: Sunday 30 Aug, 8AM (local time) - 11ft (3.5m), 18s period, SW swell with offshore winds.
- Most powerful swell: Thursday 27 Aug, 5AM (local time) - 15ft (4.5m), 16s period, SW swell with 9,531 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 0.1m and 9s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Cobblestones in the next 16 days are 4.5m 16s and forecast to arrive on Thursday (Aug 27) at 5AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.4m 6s period and expected on Friday (Aug 28) at 5AM.
| Wave Type | Time (AWST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2PM (Sat 29th Aug) | 10ft (3.0m) 17s |
| Best Surf | 8AM (Sun 30th Aug) | 11ft (3.5m) 18s |
| Most Powerful | 5AM (Thu 27th Aug) | 15ft (4.5m) 16s |
Table - best surf conditions forecast for Cobblestones over the next 16 days.
The Lowdown
Alright, Rusty here again. Let's break it down in feet and miles per hour.
We've got a solid run of swell at Cobblestones, but the wind is going to be a real pain for most of it. The first few days are a total mess with lumpy, cross-shore winds. The real window to get excited about is Saturday afternoon through to Sunday morning, that's the 29th to the 30th of August. Saturday afternoon we're looking at around 10ft of SW groundswell with a 17-second period and a clean offshore wind from the ENE. That's a magic combo, and the energy is pumping (5283). Sunday morning is also a cracker, with about 12ft of SW swell, a 17-second period and a light, clean cross-off breeze from the NNE, with even more energy behind it (6471). This is the pick of the whole forecast. Just keep in mind, this is a consistent, exposed reef break for advanced surfers, and with waves this good, you won't be alone.
After that, the wind turns nasty. Monday the 31st and Tuesday the 1st of September are a complete washout with onshore and cross-onshore winds up to 15 mph and poor conditions. The swell stays big, but the quality is trashed. We then have a long stretch of onshore, choppy, and generally crummy conditions right through to the 5th of September.
Then things get heavy. On Saturday the 5th of September, a massive 21ft SW swell is forecast, with energy readings that are off the charts (34360). The wind is light, but it's a cross-on, and the forecast says it's simply too big for this break. This is expert-only, and even then, it's a maybe. This big, long-period groundswell (15 seconds) is going to be a beast on a reef, and it's seriously dangerous. The early part of the following week, the 6th to the 7th, stays huge with 20ft waves, but the wind is light and variable, which could offer some windows for the truly brave. By the 8th and 9th of September, the swell drops back to a more manageable 12ft to 15ft, and the winds start to ease. The 9th of September afternoon looks promising, with a 13ft SW swell, a 16-second period, and light cross-on wind, giving a decent energy reading (8670). The 10th and 11th fade out with moderate cross-shore winds and messy conditions.
The first few days are a write-off, but the end of August delivers some proper, clean, powerful groundswell. The huge stuff in early September is for the pros only. The best bet is the 29th and 30th of August.
Rusty.
Short Range ForecastMostly dry. Warm (max 20°C on Sat afternoon, min 10°C on Thu night). Winds decreasing (fresh winds from the SSE on Thu afternoon, light winds from the ESE by Sat afternoon). | Days 4-6 Weather SummarySome drizzle, heaviest during Mon night. Warm (max 20°C on Sun afternoon, min 12°C on Mon night). Winds increasing (calm on Sun night, fresh winds from the W by Mon afternoon). | ||||||||||||||||||||
Thursday 27 | Friday 28 | Saturday 29 | Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | |||||||||||||||
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 | WSW 14 | SW 13 | SW 12 | SW 12 | SW 11 | SW 16 | SW 17 | SW 17 | SW 17 | WSW 16 | WSW 16 | WSW 15 | WSW 16 | WSW 16 | SW 15 | WSW 14 | SW 14 | SW 14 | SW 14 | WSW 15 |
Wave Graph  | |||||||||||||||||||||
 kJ | 6550 | 4082 | 2176 | 1693 | 822 | 506 | 2325 | 5499 | 6242 | 6797 | 4844 | 4108 | 2111 | 3417 | 5186 | 3573 | 3066 | 3761 | 5404 | 5469 | 7733 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross-off | cross-off | cross | cross-off | cross-off | off | cross-off | cross-off | cross | on | cross-on | on | cross-on | on | on | on | on | on | cross-on |
High Tide | 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 | 12:35PM0.51m | 11:57PM0.78m | 00:29AM0.82m | ||||||||
Low Tide | 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 | 7:07AM0.42m | 3:46PM0.49m | 10:34AM0.40m | |||||||||
 |  |  | | | | |  | | | |  | | |  | | |  |  | | | |
 | 6:45 | — | — | 6:43 | — | — | 6:43 | — | — | 6:41 | — | — | 6:39 | — | — | 6:39 | — | — | 6:37 | — | — |
 | — | 5:58 | — | — | 5:58 | — | — | 5:59 | — | — | 6:00 | — | — | 6:00 | — | — | 6:00 | — | — | 6:01 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | — | — | — | 1 | — | — |
Temp °C | 15 | 15 | 12 | 13 | 17 | 13 | 15 | 20 | 16 | 19 | 20 | 18 | 17 | 18 | 13 | 13 | 15 | 15 | 16 | 16 | 16 |
Feels °C | 9 | 7 | 6 | 8 | 12 | 8 | 12 | 18 | 13 | 18 | 18 | 18 | 16 | 12 | 9 | 9 | 10 | 9 | 11 | 11 | 10 |
Swell 1 Height (m) Direction Period (s) | SW 15 | WSW 14 | SW 13 | SW 12 | SW 12 | SW 11 | SW 16 | SW 17 | SW 17 | SW 17 | WSW 16 | WSW 16 | WSW 15 | WSW 16 | WSW 16 | SW 15 | WSW 14 | SW 14 | SW 14 | SW 14 | WSW 15 |
| kJ | 6550 | 4082 | 2176 | 1693 | 822 | 506 | 2325 | 5499 | 6242 | 6797 | 4844 | 4108 | 2111 | 3417 | 5186 | 3573 | 3066 | 3761 | 5404 | 5469 | 7733 |
Swell 2 Height (m) Direction Period (s) | — | — | SW 21 | WSW 20 | SW 20 | SW 18 | SW 19 | — | — | — | — | — | WSW 18 | — | — | — | — | — | — | SW 18 | — |
| kJ | — | — | 18 | 39 | 98 | 323 | 1185 | — | — | — | — | — | 1192 | — | — | — | — | — | — | 252 | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | SW 26 | WSW 24 | SW 21 | S 9 | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | 25 | 54 | 365 | 2 | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | SE 6 | S 7 | SSE 6 | SE 5 | SSE 6 | SE 6 | SE 5 | — | — | — | — | — | W 5 | WSW 7 | — | — | — | — | — | — | — |
| kJ | 77 | 414 | 176 | 85 | 136 | 51 | 30 | — | — | — | — | — | 78 | 528 | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 31 | 1346 | 1689 | 1 | 1 | 20 | 1 | 0 | 0 | 0 | 0 | 53 | 2 | 359 | 20 | 1 | 458 | 359 | 359 | 89 | 89 |
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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