Surf Forecasts:
Cobblestones surf forecast from 23 Aug 2026:
- Best quality surf: Wednesday 26 Aug, 11AM (local time) - 18ft (5.5m), 18s period, WSW swell with cross-shore winds.
- Most powerful swell: Wednesday 26 Aug, 11AM (local time) - 18ft (5.5m), 18s period, WSW swell with 17,108 kJ wave energy.
- Next surfable swell (1★+): Wednesday 26 Aug, 11AM (local time) - 18ft (5.5m), 18s period with WSW 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 Wednesday (Aug 26) at 11AM. The primary swell is predicted to be 5.5m and 18s period. The wind is predicted to be cross-shore 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 11AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.1m 6s period and expected on Tuesday (Aug 25) at 2PM.
| Wave Type | Time (AWST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11AM (Wed 26th Aug) | 18ft (5.5m) 18s |
| Best Surf | 11AM (Wed 26th Aug) | 18ft (5.5m) 18s |
| Most Powerful | 11AM (Wed 26th Aug) | 18ft (5.5m) 18s |
Table - best surf conditions forecast for Cobblestones over the next 16 days.
The Lowdown
Alright, let's talk about Cobblestones. This is a solid, exposed reef break that needs the right conditions to really fire, and for most of this run, it's gonna be a bit of a mixed bag. We're looking at a few days of waiting before things get interesting, but when they do, hold onto your board.
The water here is sitting at 66°, which is a touch warmer than you'd normally expect for this time of year, so maybe leave the full wetsuit at home.
The first real sniff of something good comes on Saturday the 29th of August morning. We've got a clean 10ft SW groundswell with a very long period of 16 seconds rolling in. The wind is a light offshore from the ENE, and the combined energy is a solid 4908 (moderate-strong). That's going to produce some serious, lined-up sets. This is definitely one for the experienced crew, as it's an advanced reef break and the swell is over 8ft.
The following morning, Sunday the 30th of August, looks even better for the early crew. Still a clean 10ft SW groundswell (16 second period), with a light cross-offshore breeze from the NNE. The combined energy is a bit lower at 3919, but the conditions are described as "excellent" for experienced surfers. Expect long, clean walls perfect for a reef setup. Crowds can be an issue here sometimes, so you'll want to be an early riser.
Fast forward a week to Friday the 4th of September. This is the standout of the whole window. The morning is looking exceptional for experts. We're talking a 13ft WSW groundswell, clean as a whistle with a light offshore from the north, and a combined energy of 5429 (strong). That's a powerful, glassy session for the brave.
The afternoon of that same day gets even bigger – 16ft WSW swell with a 16-second period and an energy reading of 11386 (very strong). The wind goes onshore, but for an expert-only wave, that offshore wind in the morning is the ticket.
After that, the swell hangs in but gets a bit messy. The morning of Saturday the 6th of September sees a big 15ft WSW swell but with a cross-onshore breeze, making it lumpy. By the afternoon, it's even bigger at 16ft, but the wind is a problem. The swell gets massive into Sunday the 7th of September, with a 21ft WSW swell and an incredible 20-second period. The combined energy is a massive 33044, but it's just too big for this break. That's big-wave territory only, and the wind is clean offshore in the morning, but the file says it's too big for this spot.
So, to boil it down: The best of the best are the mornings of August 29th, August 30th, and September 4th. Get in the water early, pick your sets wisely, and enjoy the ride. The rest of the time, you'll be fighting wind or dealing with waves that are either too small or too intimidating.
Rusty.
Short Range ForecastModerate rain (total 14mm), heaviest on Tue afternoon. Very mild (max 17°C on Tue morning, min 14°C on Sun afternoon). Winds increasing (light winds from the W on Mon morning, fresh winds from the NW by Tue afternoon). | Days 4-6 Weather SummaryModerate rain (total 10mm), heaviest on Wed morning. Very mild (max 16°C on Fri afternoon, min 10°C on Fri night). Winds increasing (light winds from the SSE on Wed afternoon, fresh winds from the SSE by Thu afternoon). | ||||||||||||||||||||
Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | |||||||||||||||
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 13 | SW 13 | SW 15 | SW 13 | SW 13 | WSW 12 | WSW 14 | WSW 13 | WSW 15 | WSW 18 | WSW 17 | SW 16 | SW 15 | SW 14 | SW 13 | SW 12 | SW 12 | SW 12 | SW 16 | SW 15 | SW 17 |
Wave Graph | |||||||||||||||||||||
2318 | 2345 | 5187 | 3045 | 2207 | 2138 | 3023 | 4768 | 7213 | 17108 | 15029 | 10377 | 6228 | 4691 | 2719 | 1576 | 1130 | 1144 | 4356 | 3664 | 6250 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-on | cross | cross-on | cross-on | cross | cross-on | on | cross | cross | cross | cross | cross | cross-off | cross-off | cross | cross-off | off | cross-on | off |
High Tide | 6:35AM0.90m | 7:24AM0.91m | 8:07AM0.91m | 8:49AM0.90m | 11:28PM0.59m | 9:30AM0.85m | 11:07PM0.60m | 10:11AM0.79m | 11:06PM0.63m | ||||||||||||
Low Tide | 4:05PM0.29m | 4:17PM0.29m | 4:29PM0.31m | 4:41PM0.32m | 4:53PM0.34m | 2:29AM0.56m | 5:05PM0.37m | 3:35AM0.51m | 5:13PM0.41m | 4:35AM0.46m | |||||||||||
6:50 | — | — | 6:48 | — | — | 6:48 | — | — | 6:47 | — | — | 6:45 | — | — | 6:43 | — | — | 6:43 | — | — | |
— | 5:54 | — | — | 5:55 | — | — | 5:55 | — | — | 5:57 | — | — | 5:58 | — | — | 5:58 | — | — | 5:59 | — | |
mm | — | — | — | — | — | — | 1 | 6 | 7 | 3 | 3 | 4 | — | — | — | — | — | — | — | — | — |
Temp °C | 15 | 14 | 15 | 15 | 15 | 16 | 17 | 17 | 16 | 14 | 13 | 14 | 14 | 15 | 14 | 13 | 16 | 13 | 14 | 16 | 16 |
Feels °C | 10 | 9 | 12 | 12 | 10 | 10 | 11 | 11 | 12 | 12 | 12 | 8 | 7 | 8 | 9 | 8 | 11 | 8 | 11 | 14 | 14 |
Swell 1 Height (m) Direction Period (s) | SW 13 | SW 13 | SW 15 | SW 13 | SW 13 | WSW 12 | WSW 14 | WSW 13 | WSW 15 | WSW 18 | WSW 17 | SW 16 | SW 15 | SW 14 | SW 13 | SW 12 | SW 12 | SW 12 | SW 16 | SW 15 | SW 17 |
2318 | 2345 | 5187 | 3045 | 2207 | 2138 | 3023 | 3920 | 7213 | 17108 | 15029 | 10377 | 6228 | 4691 | 2719 | 1576 | 1130 | 1144 | 4356 | 3664 | 6250 | |
Swell 2 Height (m) Direction Period (s) | WSW 18 | WSW 16 | — | — | — | SW 15 | — | W 24 | WSW 21 | — | — | — | — | — | SW 21 | SW 20 | SW 20 | SW 18 | SW 20 | SW 18 | — |
448 | 1209 | — | — | — | 631 | — | 11 | 793 | — | — | — | — | — | 18 | 15 | 98 | 370 | 552 | 2059 | — | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | S 12 | S 12 | — | — | — | — | — | — | — | SW 24 | SW 21 | — | NNE 5 | — |
— | — | — | — | — | — | — | 3 | 11 | — | — | — | — | — | — | — | 22 | 222 | — | 9 | — | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | NW 5 | NW 6 | WSW 13 | — | — | — | — | — | — | — | — | — | ENE 3 | — | — | — |
— | — | — | — | — | 35 | 145 | 4768 | — | — | — | — | — | — | — | — | — | 3 | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 2 | 35 | 2 | 38 | 301 | 53 | 220 | 251 | 2 | 10 | 10 | 89 | 1340 | 88 | 1 | 1 | 20 | 0 | 0 | 20 | 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.











