Surf Forecasts:
Cobblestones surf forecast from 21 Aug 2026:
- Best quality surf: Wednesday 26 Aug, 11AM (local time) - 16ft (5.0m), 18s period, WSW swell with onshore winds.
- Most powerful swell: Wednesday 26 Aug, 2PM (local time) - 18ft (5.5m), 18s period, WSW swell with 16,933 kJ wave energy.
- Next surfable swell (1★+): Friday 21 Aug, 11PM (local time) - 10ft (3.0m), 14s 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 11PM. The primary swell is predicted to be 3.0m and 14s period with a secondary swell of 1.8m and 18s. 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 5.5m 18s and forecast to arrive on Wednesday (Aug 26) at 2PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.8m 6s period and expected on Tuesday (Aug 25) at 5PM.
| Wave Type | Time (AWST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11PM (Fri 21st Aug) | 10ft (3.0m) 14s |
| Best Surf | 11AM (Wed 26th Aug) | 16ft (5.0m) 18s |
| Most Powerful | 2PM (Wed 26th Aug) | 18ft (5.5m) 18s |
Table - best surf conditions forecast for Cobblestones over the next 16 days.
The Lowdown
G'day, I'm Rusty, and let's get into it for Cobblestones. This is a consistent, advanced reef break that's exposed to the swell, and it's been working on a juicy SSW groundswell. The water temp is sitting at 66°, which is a touch warmer than normal for this time of year, so you might be able to get away with a slightly thinner suit.
The first real standout is Friday morning, the 21st of August. We've got a solid 12 ft SW groundswell rolling in with a 14-second period, packing a massive 5427 (strong) energy. The wind is glassy from the north at just 3 mph, and the conditions are clean. This is going to be exceptional surf for expert surfers only, as that size is well over the 8 ft mark. It's a heavy, powerful reef setup, so if you're not absolutely on your game, give it a miss.
The rest of the weekend and into the next week looks pretty average. The wind swings onshore or cross-onshore, bringing chop and poor conditions. The swell stays solid, between 8 ft and 10 ft, but the quality just isn't there for a good session.
Now, keep your eye on Wednesday the 26th of August. The forecast is calling for a massive 16 ft WSW swell with a 18-second period, and the energy reading is a massive 16803 (very strong). The morning wind is clean onshore from the WSW at 12 mph. The guidance says the wind and tide are favorable, but honestly, at 16 ft this is going to be absolutely monstrous and only for the most experienced, and it might even be too big for the break itself. It's a serious, long-range call with a lot of power.
After that, there's a bit of a lull in quality until the 28th of August. The Friday morning of the 28th sees a cleaner 8 ft SW swell with a 12-second period, and light ESE cross-off winds at 6 mph, making for clean conditions. The energy is 2172 (strong), and it's a good option for experienced surfers, though it's a bit smaller than the earlier bomb.
Looking further ahead, the 30th of August Sunday morning has a 10 ft SW swell with a long 18-second period, and clean cross-off winds from the north at 22 mph. The energy is 5551 (strong). It's a solid, clean option, but the wind is strong, so it might be a bit lumpy at the takeoff.
The 5th of September Saturday morning shows a 12 ft SW swell with a 13-second period, and clean conditions with SE cross-off winds at 9 mph. The energy is 4987 (strong). It's another promising call, but it's out in the second week, so treat it as a promising possibility rather than a sure thing.
For the most part, the wind is the enemy here, but if you're an expert, keep the 21st and the 26th of August on your radar. The water's a touch warmer than usual, and the swell is consistent. Stay safe out there.
Rusty
Short Range ForecastSome drizzle, heaviest during Sun morning. Very mild (max 15°C on Fri morning, min 12°C on Fri night). Wind will be generally light. | Days 4-6 Weather SummaryModerate rain (total 12mm), heaviest on Tue night. Very mild (max 17°C on Tue night, min 11°C on Mon morning). Winds increasing (light winds from the NE on Mon morning, strong winds from the WNW by Tue night). | ||||||||||||||||||||
Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | |||||||||||||||
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 14 | SW 14 | SW 14 | SW 16 | SW 16 | SW 14 | SW 13 | SW 13 | SW 14 | SW 14 | SW 13 | WSW 13 | SW 14 | WSW 13 | WSW 15 | WSW 18 | WSW 17 | WSW 16 | SW 15 | SW 14 | SW 13 |
Wave Graph | |||||||||||||||||||||
5285 | 4654 | 3056 | 4301 | 3283 | 1891 | 2318 | 2381 | 5116 | 3091 | 2490 | 2257 | 3430 | 3584 | 6312 | 16803 | 15203 | 9641 | 6856 | 4976 | 3123 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | cross-on | cross-off | cross-on | cross-on | cross-on | cross-on | cross-on | glassy | cross | cross-on | cross-on | cross | cross | cross-on | on | cross-on | cross | cross | cross-on | cross |
High Tide | 3:39AM0.84m | 5:28AM0.87m | 6:35AM0.90m | 7:24AM0.91m | 8:07AM0.91m | 8:49AM0.90m | 11:28PM0.59m | ||||||||||||||
Low Tide | 3:41PM0.29m | 3:54PM0.28m | 4:05PM0.29m | 4:17PM0.29m | 4:29PM0.31m | 4:41PM0.32m | 4:53PM0.34m | 2:29AM0.56m | |||||||||||||
6:52 | — | — | 6:52 | — | — | 6:50 | — | — | 6:48 | — | — | 6:48 | — | — | 6:47 | — | — | 6:45 | — | — | |
— | 5:53 | — | — | 5:53 | — | — | 5:54 | — | — | 5:55 | — | — | 5:55 | — | — | 5:57 | — | — | 5:58 | — | |
mm | — | — | — | — | — | — | 1 | — | — | — | — | — | — | — | 10 | — | — | 2 | — | — | — |
Temp °C | 15 | 15 | 14 | 15 | 15 | 14 | 14 | 14 | 13 | 14 | 15 | 16 | 16 | 16 | 17 | 15 | 15 | 13 | 15 | 15 | 14 |
Feels °C | 14 | 13 | 11 | 11 | 10 | 10 | 9 | 9 | 10 | 10 | 10 | 10 | 10 | 10 | 11 | 10 | 11 | 7 | 12 | 9 | 10 |
Swell 1 Height (m) Direction Period (s) | SW 14 | SW 14 | SW 14 | SW 16 | SW 16 | SW 14 | SW 13 | SW 13 | SW 14 | SW 14 | SW 13 | WSW 13 | SW 14 | WSW 13 | WSW 15 | WSW 18 | WSW 17 | WSW 16 | SW 15 | SW 14 | SW 13 |
5285 | 4654 | 3056 | 4301 | 3283 | 1891 | 2318 | 2381 | 5116 | 3091 | 2490 | 2257 | 3430 | 3584 | 6312 | 16803 | 15203 | 9641 | 6856 | 4976 | 3123 | |
Swell 2 Height (m) Direction Period (s) | SW 24 | SW 20 | SW 17 | — | — | WSW 20 | WSW 18 | WSW 16 | — | — | — | SW 18 | — | — | NW 6 | — | — | NW 7 | — | — | — |
142 | 1261 | 2719 | — | — | 75 | 448 | 1209 | — | — | — | 155 | — | — | 109 | — | — | 130 | — | — | — | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | SW 15 | — | — | WNW 7 | — | — | — | — | — | — |
— | — | — | — | — | — | — | — | — | — | — | 134 | — | — | 28 | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | SSW 4 | — | — | — | — | — | — | — | NW 5 | NW 6 | NW 6 | — | NW 7 | SSW 5 | — | — | — |
— | — | — | — | 18 | — | — | — | — | — | — | — | 51 | 231 | 175 | — | 306 | 80 | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 1 | 0 | 20 | 359 | 20 | 20 | 20 | 0 | 28 | 251 | 201 | 201 | 220 | 201 | 38 | 35 | 1 | 1 | 89 | 0 |
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.











