Surf Forecasts:
Cobblestones surf forecast from 28 Aug 2026:
- Best quality surf: Sunday 30 Aug, 5AM (local time) - 11ft (3.5m), 18s period, SW swell with cross-offshore winds.
- Most powerful swell: Sunday 30 Aug, 5AM (local time) - 11ft (3.5m), 18s period, SW swell with 7,333 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 glassy as the swell arrives.
The most powerful waves expected at Cobblestones in the next 16 days are 3.5m 18s and forecast to arrive on Sunday (Aug 30) at 5AM. Winds are predicted to be cross-offshore 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 8PM.
| Wave Type | Time (AWST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2PM (Sat 29th Aug) | 10ft (3.0m) 17s |
| Best Surf | 5AM (Sun 30th Aug) | 11ft (3.5m) 18s |
| Most Powerful | 5AM (Sun 30th Aug) | 11ft (3.5m) 18s |
Table - best surf conditions forecast for Cobblestones over the next 16 days.
The Lowdown
G’day, Rusty here. Righto, we’ve got a solid 16-day window ahead at Cobblestones. This isn’t a spot for the faint-hearted – it’s a reef break for advanced crew only, and it’s consistent, so it’ll pump. The water’s sitting at 65°F, which is a touch warmer than normal for this time of year. We kick off with surf straight away, so no gap to worry about.
Friday the 28th August morning serves up a 2.3m (8ft) SW swell with a 12-second period, energy is moderate (1630). Wind is a cross-off from the SE at 12 mph, keeping things clean. It’s a bit on the bigger side, but with that offshore breeze, the waves will be tidy. The afternoon turns lumpy with a cross-shore wind, so get on it early.
Saturday the 29th is where the real meat shows up. Morning has 2.2m (7ft) SW swell with a long 16-second period, and the energy is already strong (3510). Wind is cross-off from the ESE at 12 mph, so clean again. But the standout is Saturday afternoon – glassy conditions with the wind dropping to 3 mph from the east, and the swell jumps to 3.0m (10ft) SW with a 17-second period. Energy is pumping at 5223. That’s exceptional surf for experts. The long period means the waves will have heaps of power and shape, but at 3.0m it’s for experienced surfers only.
Sunday the 30th morning stays good with a 3.5m (12ft) SW swell and a 17-second period – energy is through the roof at 6471. A light NNE breeze at 9 mph keeps it clean. The afternoon turns cross-on from the NW, so it gets choppier. Monday the 31st is a write-off with strong winds and poor conditions.
Tuesday the 1st September has 3.0m (10ft) SW swell with a 15-second period, and the wind goes offshore from the SW at 6 mph in the morning. Energy is strong (3869). The afternoon holds but with lighter onshore. Wednesday the 2nd is messy with cross-on winds and rain.
Thursday the 3rd September morning is a gem again – 3.5m (12ft) SW swell, 13-second period, energy is 4271, and a light cross-off from the SE at 6 mph keeps it clean. Excellent for experienced surfers. The afternoon goes onshore again.
Friday the 4th and Saturday the 5th are both blown out with strong winds and rain – forget about it.
Sunday the 6th September is average, with cross-on winds and 2.2m (7ft) SSW swell. Nothing special.
Now, Monday the 7th September morning has a 2.2m (7ft) SSW swell with a 12-second period, energy is 2018, and a light cross-off from the NNE at 6 mph makes for clean, excellent waves for the experienced crew. Tuesday the 8th morning is another beauty – 2.5m (8ft) SW swell, a long 15-second period, energy at 3104, and a glassy cross-off from the north at 6 mph. Excellent conditions for experienced surfers.
The real standout in the second week is Thursday the 10th September. Morning sees a massive 5.5m (18ft) WSW swell with a 16-second period, energy is a monstrous 13697. Wind is cross-off from the NNE at 16 mph, so it’s clean. That’s only for the most experienced, and it’s a long way out, so fingers crossed it holds. The afternoon stays big but turns cross-shore. Friday the 11th is blown out in the morning, but the afternoon has 4.5m (15ft) SW swell with a 15-second period and a cross-shore wind – marginal but with that energy (9256), it could be a session for the brave.
Overall, Saturday the 29th August afternoon and Thursday the 10th September morning are the pick of the bunch. The 29th has glassy conditions and a solid 3.0m groundswell, while the 10th is a monster 5.5m swell with clean wind. Get onto it if you’re advanced enough.
Rusty.
Short Range ForecastMostly dry. Very mild (max 19°C on Sat afternoon, min 11°C on Fri morning). Winds decreasing (fresh winds from the SSE on Fri afternoon, calm by Sat afternoon). | Days 4-6 Weather SummaryLight rain (total 4mm), mostly falling on Mon afternoon. Very mild (max 18°C on Mon morning, min 12°C on Mon night). Winds decreasing (fresh winds from the S on Mon afternoon, light winds from the S by Tue morning). | ||||||||||||||||||||
Friday 28 | Saturday 29 | Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | |||||||||||||||
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 12 | SW 12 | SW 11 | SW 16 | SW 17 | SW 17 | SW 17 | WSW 16 | WSW 16 | WSW 17 | WSW 16 | WSW 16 | SW 15 | SW 14 | SW 12 | SW 14 | SW 13 | SW 14 | SW 13 | SW 14 | SW 14 |
Wave Graph  | |||||||||||||||||||||
 kJ | 1591 | 822 | 506 | 2325 | 5223 | 6242 | 6471 | 4844 | 4108 | 3955 | 3504 | 4447 | 3869 | 3595 | 2101 | 2609 | 3250 | 4443 | 4271 | 4435 | 4309 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross | cross-off | cross-off | glassy | cross-off | cross-off | cross-on | cross-on | cross-on | cross | cross | on | on | cross-on | cross-on | cross-on | on | cross-off | on | cross |
High Tide | 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 | 1:15AM0.84m | |||||||||
Low Tide | 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 | 1:11PM0.31m | ||||||||||
 | |  | |  | | | | | |  |  | | | |  |  |  | | |  | |
 | 6:43 | — | — | 6:43 | — | — | 6:41 | — | — | 6:39 | — | — | 6:39 | — | — | 6:37 | — | — | 6:35 | — | — |
 | — | 5:58 | — | — | 5:59 | — | — | 6:00 | — | — | 6:00 | — | — | 6:00 | — | — | 6:01 | — | — | 6:01 | — |
mm | — | — | — | — | — | — | — | — | — | — | 1 | 1 | — | — | — | — | 2 | — | 2 | — | 5 |
Temp °C | 14 | 17 | 13 | 16 | 19 | 17 | 18 | 18 | 17 | 18 | 18 | 13 | 13 | 13 | 13 | 14 | 15 | 15 | 14 | 15 | 16 |
Feels °C | 9 | 12 | 8 | 12 | 18 | 14 | 16 | 15 | 17 | 14 | 13 | 9 | 10 | 10 | 10 | 10 | 10 | 9 | 12 | 14 | 9 |
Swell 1 Height (m) Direction Period (s) | SW 12 | SW 12 | SW 11 | SW 16 | SW 17 | SW 17 | SW 17 | WSW 16 | WSW 16 | WSW 17 | WSW 16 | WSW 16 | SW 15 | SW 14 | SW 12 | SW 14 | SW 13 | SW 14 | SW 13 | SW 14 | SW 14 |
| kJ | 1591 | 822 | 506 | 2325 | 5223 | 6242 | 6471 | 4844 | 4108 | 3955 | 3504 | 4447 | 3869 | 3595 | 2101 | 2609 | 3250 | 4443 | 4271 | 4435 | 4309 |
Swell 2 Height (m) Direction Period (s) | WSW 20 | SW 20 | SW 18 | SW 19 | — | — | — | — | WSW 20 | — | — | — | — | — | WSW 14 | — | — | — | — | — | — |
| kJ | 39 | 60 | 323 | 1185 | — | — | — | — | 441 | — | — | — | — | — | 691 | — | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | SW 23 | SW 21 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | 84 | 365 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | SE 5 | SSE 5 | SE 6 | SE 5 | SSE 4 | SE 6 | — | — | — | W 4 | W 5 | — | — | — | — | — | — | — | — | — | — |
| kJ | 60 | 106 | 49 | 60 | 32 | 36 | — | — | — | 19 | 82 | — | — | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 1 | 20 | 1 | 0 | 0 | 0 | 15 | 38 | 2 | 359 | 1689 | 0 | 2 | 2 | 2 | 201 | 251 | 89 | 0 | 2 | 201 |
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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