Surf Forecasts:
Cobblestones surf forecast from 20 Aug 2026:
- Best quality surf: Thursday 20 Aug, 11PM (local time) - 13ft (4.0m), 15s period, SW swell with cross-offshore winds.
- Most powerful swell: Wednesday 26 Aug, 2PM (local time) - 15ft (4.5m), 17s period, WSW swell with 12,207 kJ wave energy.
- Next surfable swell (1★+): Thursday 20 Aug, 11PM (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 20) at 11PM. The primary swell is predicted to be 4.0m and 15s 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 4.5m 17s and forecast to arrive on Wednesday (Aug 26) at 2PM. Winds are predicted to be cross-onshore at the time the swell arrives.
| Wave Type | Time (AWST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11PM (Thu 20th Aug) | 13ft (4.0m) 15s |
| Best Surf | 11PM (Thu 20th Aug) | 13ft (4.0m) 15s |
| Most Powerful | 2PM (Wed 26th Aug) | 15ft (4.5m) 17s |
Table - best surf conditions forecast for Cobblestones over the next 16 days.
The Lowdown
Hey folks, Rusty here. Let's look at the only game in town for the next couple of weeks: Cobblestones. This reef setup is an advanced, consistent spot that's exposed to south-southwest swells, so when the direction lines up, it can fire. The water is sitting at 66°, which is a touch warmer than usual for this time of year, so you might not need the thickest wetsuit.
We've got a bit of a slow start today, Thursday the 20th. The swell is a solid 13ft from the WSW with a very long 16-second period, packing a massive 7197 units of energy. But the wind is onshore, making it a bit of a mess. The afternoon stays similar, with a cross-on breeze. Not the best.
The real standout is Friday morning, the 21st of August. The forecast is for clear skies, zero wind, and glassy conditions. We're looking at a 12ft SW groundswell with a 14-second period (5427 energy). This is primo stuff for the experts out there – clean, powerful, and well-shaped on the reef. The crowds can be around sometimes, but on a Friday morning, you might get a few sets to yourself.
Saturday morning the 22nd sees the swell drop to 10ft, but the wind swings cross-on, making it choppy. It gets worse into the afternoon as the wind picks up. Sunday the 23rd is a write-off with strong onshore winds and poor surf.
Monday the 24th looks promising again, with a clean morning and a light cross-off breeze. The 10ft SW swell (3122 energy) will be a lot more manageable than the weekend's mess. The wind stays light for the afternoon, but it goes cross-shore. A solid option for experienced surfers, but not a standout.
After that, the forecast gets a bit messy. We have a couple of days of strong winds and rain, with the swell fluctuating between 7ft and 15ft. The energy peaks on Wednesday the 26th with a massive 11503 units, but the wind is howling onshore, making it a total washout for paddle surfing. If you're into kitesurfing, that might be your window.
The next real highlight is a long way off, but it's worth a mention. Monday the 31st of August and Tuesday the 1st of September are looking promising. The 31st has a 13ft to 18ft WSW swell (8782-9114 energy), with a clean, cross-off breeze. That's a massive, powerful swell. The 1st of September continues with 13-15ft WSW swell and clean conditions. Keep an eye on this, but it's a long-range call, so don't book the time off just yet.
Overall, the next two weeks are a mixed bag. The clear winner is this Friday morning, the 21st. If you can only get out once, that's your window.
Rusty.
Short Range ForecastMostly dry. Very mild (max 16°C on Thu afternoon, min 12°C on Fri night). Wind will be generally light. | Days 4-6 Weather SummaryModerate rain (total 11mm), heaviest on Tue night. Very mild (max 16°C on Tue morning, min 11°C on Sun night). Winds increasing (light winds from the E on Sun night, fresh winds from the NW by Tue night). | ||||||||||||||||||||
Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | |||||||||||||||
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) | WSW 16 | SW 16 | SW 15 | SW 14 | SW 14 | SW 14 | SW 16 | SW 16 | SW 14 | SW 13 | WSW 16 | SW 14 | SW 13 | SW 13 | SW 12 | WSW 10 | WSW 14 | WSW 15 | WSW 17 | WSW 17 | SW 16 |
Wave Graph  | |||||||||||||||||||||
 kJ | 7197 | 7196 | 6375 | 5285 | 4654 | 3056 | 4123 | 3439 | 1918 | 2574 | 3178 | 5462 | 3122 | 2008 | 1223 | 748 | 3737 | 9045 | 11503 | 11480 | 8144 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross-on | cross-off | glassy | cross-on | cross-off | cross-on | cross-on | cross-on | cross-on | cross | cross-off | cross-off | cross | cross-on | cross | cross-on | cross | cross-on | cross-on | cross-on |
High Tide | 2:08AM0.81m | 3:39AM0.84m | 5:28AM0.87m | 6:35AM0.90m | 7:24AM0.91m | 8:07AM0.91m | |||||||||||||||
Low Tide | 3:31PM0.30m | 3:41PM0.29m | 3:54PM0.28m | 4:05PM0.29m | 4:17PM0.29m | 4:29PM0.31m | 4:41PM0.32m | ||||||||||||||
 |  |  |  | |  | | | | | | | | | | | |  |  |  | | |
 | 6:54 | — | — | 6:52 | — | — | 6:52 | — | — | 6:50 | — | — | 6:48 | — | — | 6:48 | — | — | 6:47 | — | — |
 | — | 5:52 | — | — | 5:53 | — | — | 5:53 | — | — | 5:54 | — | — | 5:55 | — | — | 5:55 | — | — | 5:57 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 11 | 2 | 7 | 2 |
Temp °C | 15 | 16 | 15 | 14 | 15 | 14 | 14 | 15 | 14 | 15 | 15 | 13 | 12 | 13 | 15 | 16 | 16 | 16 | 16 | 12 | 14 |
Feels °C | 11 | 13 | 13 | 13 | 13 | 11 | 11 | 11 | 9 | 10 | 9 | 9 | 10 | 10 | 12 | 11 | 11 | 12 | 12 | 6 | 7 |
Swell 1 Height (m) Direction Period (s) | WSW 16 | SW 16 | SW 15 | SW 14 | SW 14 | SW 14 | SW 16 | SW 16 | SW 14 | SW 13 | WSW 16 | SW 14 | SW 13 | SW 13 | SW 12 | WSW 10 | WSW 14 | WSW 15 | WSW 17 | WSW 17 | SW 16 |
| kJ | 7197 | 7196 | 6375 | 5285 | 4654 | 3056 | 4123 | 3439 | 1918 | 2574 | 3178 | 5462 | 3122 | 2008 | 1223 | 748 | 3737 | 9045 | 11503 | 11480 | 8144 |
Swell 2 Height (m) Direction Period (s) | — | — | — | SW 24 | SW 20 | SW 17 | — | — | WSW 20 | WSW 18 | SW 12 | — | — | — | SW 15 | SW 13 | — | — | — | — | WSW 16 |
| kJ | — | — | — | 142 | 1261 | 2719 | — | — | 76 | 603 | 1777 | — | — | — | 212 | 543 | — | — | — | — | 1137 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | SW 18 | SW 16 | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 82 | 386 | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 2 | 1 | 0 | 0 | 1 | 0 | 1 | 20 | 20 | 35 | 1689 | 0 | 0 | 38 | 39 | 53 | 53 | 201 | 35 | 2 | 1689 |
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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