Surf Forecasts:
Cobblestones surf forecast from 13 Aug 2026:
- Best quality surf: Monday 17 Aug, 11AM (local time) - 13ft (4.0m), 17s period, WSW swell with cross-shore winds.
- Most powerful swell: Thursday 20 Aug, 11AM (local time) - 16ft (5.0m), 17s period, WSW swell with 13,016 kJ wave energy.
- Next surfable swell (1★+): Thursday 13 Aug, 11PM (local time) - 13ft (4.0m), 16s 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 11PM. The primary swell is predicted to be 4.0m and 16s period. 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 5.0m 17s and forecast to arrive on Thursday (Aug 20) at 11AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.2m 5s period and expected on Sunday (Aug 16) at 2PM.
| Wave Type | Time (AWST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11PM (Thu 13th Aug) | 13ft (4.0m) 16s |
| Best Surf | 11AM (Mon 17th Aug) | 13ft (4.0m) 17s |
| Most Powerful | 11AM (Thu 20th Aug) | 16ft (5.0m) 17s |
Table - best surf conditions forecast for Cobblestones over the next 16 days.
The Lowdown
Alright, Rusty here, lookin' at the charts for the next couple of weeks.
Right off the bat, we’ve got some serious size on the way. The first real action hits Thursday afternoon, the 13th of August, out at Cobblestones. This is an advanced reef break, and it's exposed, so it lights up with the right direction. The water's feelin' a touch warmer than usual for this time of year, about 67°, which is a nice bonus.
Thursday afternoon sees a solid 13 ft of SW swell, but the wind is a cross-on from the SSW. It's cleanable, but not perfect. The energy is massive – we're talking nearly ten thousand (9736) units of juice. This is serious ocean. Friday the 14th is the real standout. Get up early. A light NNE breeze will have it glassy and clean, with 12 ft of that long-period SW groundswell at 16 seconds. The energy drops a bit (6148) but that's still a lot of water moving. This is for the experts only; this spot is listed as "advanced" and it will be just that.
By Saturday the 15th, it drops a touch to 8 ft SW, but the wind holds clean with that cross-off from the NNE. It’s still a bit much for anyone but experienced surfers. The combined energy is still over two thousand (2725).
Sunday the 16th keeps the size around 10 ft from the WSW, but now we've got a moderate breeze from the NNE, still cross-off, so it stays clean, but the wind is cranking at 16 mph. Still a big, powerful ocean (4127 energy units).
Then things get wild. Monday the 17th is a beast. Monday morning we get a 13 ft WSW swell at 17 seconds with a near-gale cross-shore wind at 31 mph. The energy reading is off the hook at 17,067. This is big, dangerous, and honestly, more of a kite-surfing day unless you're a madman. Monday afternoon it goes onshore at 28 mph with 15 ft, which is just poor.
Tuesday the 18th is still over 16 ft (WSW) in the morning, with a gentle onshore breeze. The energy is still massive (12,064). This is expert-only territory, and the wind isn't doing us any favors.
Wednesday the 19th is a write-off with strong onshore winds and poor conditions. Thursday the 20th dips a little, but we're back to a 16 ft WSW swell with a gentle cross-on breeze. The energy is huge again (13,016). It's marginal, but for the absolute best, there could be a window.
The second week, from the 21st to the 28th, is a mess of onshore winds and blown-out conditions. The swell stays solid – often 13 ft to 16 ft – but the wind is from the west or WSW, killing it for the paddle crew. There is a promising window on Sunday the 23rd afternoon with a 15 ft SW swell and a clean cross-off breeze from the north. That's a potential last-gasp moment for experienced surfers. After that, it's mostly onshore slop and huge westerly wind until we get a little window on the 27th morning, but the wind is howling again.
Honestly, for the whole run, it's big, powerful, and dangerous. There's no beginner-friendly water here. The best of the best is Friday morning the 14th of August and maybe the 23rd afternoon. If you're not an expert, give this one a miss.
- Rusty
Short Range ForecastMostly dry. Very mild (max 17°C on Sat afternoon, min 11°C on Fri morning). Wind will be generally light. | Days 5-7 Weather SummaryModerate rain (total 15mm), heaviest on Mon afternoon. Very mild (max 18°C on Sun afternoon, min 12°C on Mon night). Winds decreasing (strong winds from the W on Mon afternoon, light winds from the SW by Tue morning). | |||||||||||||||||||
Thu 13 | Friday 14 | Saturday 15 | Sunday 16 | Monday 17 | Tuesday 18 | Wednesday 19 | ||||||||||||||
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 17 | SW 16 | SW 16 | SW 15 | SW 14 | SW 14 | SW 13 | WSW 13 | WSW 14 | WSW 14 | WSW 15 | WSW 17 | WSW 17 | WSW 15 | WSW 16 | WSW 16 | WSW 15 | WSW 15 | WSW 15 | WSW 16 |
Wave Graph | ||||||||||||||||||||
9736 | 7675 | 6148 | 4699 | 3810 | 2725 | 2209 | 1657 | 4040 | 3501 | 3393 | 8846 | 12608 | 10768 | 10927 | 10186 | 6566 | 4522 | 7757 | 10010 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-off | cross-off | cross | off | cross-off | cross-off | off | cross-off | cross-off | cross-off | cross | on | on | on | cross-on | cross-on | cross-on | on | on |
High Tide | 10:26AM0.82m | 00:30AM0.56m | 10:47AM0.72m | 00:00AM0.59m | 10:48AM0.62m | 11:55PM0.64m | 10:00AM0.54m | 00:10AM0.70m | 00:37AM0.74m | 1:15AM0.78m | ||||||||||
Low Tide | 6:23PM0.35m | 6:25PM0.42m | 3:53AM0.53m | 6:01PM0.46m | 5:05AM0.52m | 5:10PM0.47m | 6:30AM0.52m | 4:12PM0.44m | 3:35PM0.38m | 3:25PM0.34m | ||||||||||
— | — | 7:01 | — | — | 6:58 | — | — | 6:58 | — | — | 6:56 | — | — | 6:56 | — | — | 6:54 | — | — | |
5:47 | — | — | 5:49 | — | — | 5:49 | — | — | 5:50 | — | — | 5:51 | — | — | 5:52 | — | — | 5:52 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | 3 | 5 | 2 | — | — | 2 | 3 | 2 | — |
Temp °C | 14 | 14 | 14 | 16 | 15 | 16 | 17 | 17 | 17 | 18 | 18 | 18 | 14 | 14 | 13 | 14 | 15 | 16 | 15 | 14 |
Feels °C | 12 | 11 | 11 | 13 | 14 | 12 | 13 | 16 | 12 | 12 | 14 | 12 | 4 | 4 | 7 | 9 | 8 | 8 | 9 | 9 |
Swell 1 Height (m) Direction Period (s) | SW 17 | SW 16 | SW 16 | SW 15 | SW 14 | SW 14 | SW 13 | WSW 13 | WSW 14 | WSW 14 | WSW 15 | WSW 18 | — | WSW 15 | WSW 16 | WSW 16 | WSW 15 | WSW 15 | WSW 15 | WSW 16 |
9736 | 7675 | 6148 | 4699 | 3810 | 2725 | 2209 | 1657 | 4040 | 3501 | 3393 | 8221 | — | 10768 | 10927 | 10186 | 6566 | 4522 | 7757 | 10010 | |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | — | WSW 16 | SW 24 | SW 22 | SW 20 | — | — | SW 17 | SW 16 | — | — | — | — | WSW 20 |
— | — | — | — | — | — | — | 1390 | 87 | 563 | 1422 | — | — | 3088 | 1137 | — | — | — | — | 507 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | N 4 | N 5 | N 5 | N 4 | N 5 | N 5 | WSW 17 | WSW 17 | — | — | — | NW 4 | — | — | — |
— | — | — | — | — | 20 | 21 | 7 | 27 | 74 | 34 | 8846 | 12608 | — | — | — | 16 | — | — | — | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 1 | 0 | 0 | 3 | 0 | 53 | 0 | 0 | 165 | 53 | 44 | 220 | 359 | 1106 | 2 | 201 | 201 | 546 | 2 | 35 |
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.











