Surf Forecasts:
Cobblestones surf forecast from 20 Aug 2026:
- Best quality surf: Thursday 27 Aug, 8AM (local time) - 16ft (5.0m), 15s period, WSW swell with cross-onshore winds.
- Most powerful swell: Wednesday 26 Aug, 8PM (local time) - 16ft (5.0m), 17s period, WSW swell with 14,784 kJ wave energy.
- Next surfable swell (1★+): Friday 21 Aug, 2AM (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 Friday (Aug 21) at 2AM. 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 5.0m 17s and forecast to arrive on Wednesday (Aug 26) at 8PM. Winds are predicted to be onshore at the time the swell arrives.
| Wave Type | Time (AWST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2AM (Fri 21st Aug) | 13ft (4.0m) 15s |
| Best Surf | 8AM (Thu 27th Aug) | 16ft (5.0m) 15s |
| Most Powerful | 8PM (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 have a look at what’s on the menu for Cobblestones. This spot is a reef setup, and it’s for the advanced crew only—this isn’t a beginner’s wave.
We’ve got a solid run of swell coming in, but the wind is going to be the main character in this story. The water is sitting at 66°, which is a touch warmer than normal for this time of year, so you might get away with a spring suit.
The first real chance to get wet kicks off on Thursday the 20th of August. There’s a big 13ft of SW groundswell rolling in, with a very long 16-second period. The energy is massive, but the wind is onshore and messy. It’s a bit of a beast, but not clean. Thursday afternoon is similar, with a cross-on wind making it choppy.
Friday the 21st of August is the standout of the entire forecast. Friday morning is where it’s at. The wind drops to nothing, going glassy, and the swell is still a powerful 12ft from the SW with a 14-second period. The energy is still strong. This is that rare, clean window. The conditions are described as exceptional for expert surfers. This is your one chance for a truly epic session before the wind spoils the party. Friday afternoon, the cross-on wind returns and messes it up.
Saturday the 22nd starts with 10ft of SW swell (16-second period), but that cross-on wind is back, making it fairly choppy. By the afternoon, it’s getting worse with a 12 mph cross-on wind. Sunday and Monday are blown out with strong winds.
Monday the 24th of August offers a second, smaller window. The morning is clean with a light N wind (cross-offshore) and 10ft of SW swell. The energy is still decent. It’s described as excellent for experienced surfers, so it’s worth a look if you missed Friday. The afternoon gets a bit sloppy with a cross-shore wind.
From Tuesday the 25th through to the end of the month, the wind is a constant problem. The swell stays big, often over 10ft and hitting 16ft on the 26th, but with strong onshore winds. The wave energy gets extremely high, but the conditions are just poor. This is more of a kite-surfing situation than a paddle-in day.
The first week of September doesn’t look much better. The swell remains consistently over 10ft, but the wind is either onshore or cross-onshore, keeping the surface messy and lumpy. There’s a brief glimmer on Friday the 4th of September with a drop in wind to a gentle breeze, but it’s still cross-onshore, so the quality is marginal.
To sum it up: Friday morning, the 21st of August, is your absolute best bet. The glassy conditions with that strong SW groundswell are a rare treat. Monday the 24th of August morning is your second option if you miss that window. The rest of the 16-day run is a battle with the wind. Expect crowds to be possible at Cobblestones, as it’s a known spot for the advanced crew.
Rusty.
Short Range ForecastMostly dry. Very mild (max 16°C on Thu morning, min 12°C on Fri night). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 2mm), mostly falling on Tue night. Very mild (max 17°C on Tue night, min 11°C on Sun night). Winds increasing (light winds from the E on Sun night, strong 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 | WSW 12 | WSW 13 | WSW 13 | WSW 15 | WSW 17 | WSW 17 | WSW 16 |
Wave Graph | |||||||||||||||||||||
7197 | 7196 | 6375 | 5285 | 4654 | 3056 | 4301 | 3439 | 1918 | 2318 | 2964 | 5116 | 2837 | 1977 | 1450 | 2288 | 3298 | 7235 | 13875 | 13949 | 13587 | |
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 | cross-on | cross-on | cross-off | cross-off | cross | cross-on | cross | cross | cross | on | 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 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2 | 5 | 4 | 2 |
Temp °C | 16 | 16 | 15 | 15 | 15 | 14 | 15 | 15 | 14 | 14 | 14 | 13 | 13 | 14 | 15 | 16 | 16 | 17 | 17 | 16 | 15 |
Feels °C | 12 | 13 | 12 | 15 | 13 | 11 | 13 | 11 | 9 | 10 | 9 | 10 | 11 | 12 | 11 | 12 | 12 | 12 | 10 | 9 | 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 | SW 13 | SW 14 | SW 13 | SW 13 | WSW 12 | WSW 13 | WSW 13 | WSW 15 | WSW 17 | WSW 17 | — |
7197 | 7196 | 6375 | 5285 | 4654 | 3056 | 4301 | 3439 | 1918 | 2318 | 2207 | 5116 | 2837 | 1977 | 1450 | 2288 | 3298 | 7235 | 13875 | 13949 | — | |
Swell 2 Height (m) Direction Period (s) | — | — | — | SW 24 | SW 20 | SW 17 | — | — | WSW 20 | WSW 18 | WSW 16 | — | — | — | SW 15 | — | W 24 | — | — | — | — |
— | — | — | 142 | 1261 | 2719 | — | — | 75 | 603 | 2964 | — | — | — | 262 | — | 11 | — | — | — | — | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | SW 21 | — | — | — | — | — | — | — | — | — | — | — |
— | — | — | — | — | — | — | — | — | 68 | — | — | — | — | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | W 3 | — | — | NW 5 | WNW 7 | — | — | WSW 16 |
— | — | — | — | — | — | — | — | — | — | — | — | — | 6 | — | — | 86 | 491 | — | — | 13587 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 2 | 1 | 0 | 0 | 1 | 0 | 1 | 1689 | 20 | 20 | 1689 | 0 | 0 | 38 | 88 | 53 | 53 | 201 | 1340 | 1689 | 1689 |
Best forecast wave conditions in Margaret River | |||||||||||||||||||||
Best forecast wave conditions in Australia | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
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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.











