Surf Forecasts:
Cobblestones surf forecast from 20 Aug 2026:
- Best quality surf: Wednesday 26 Aug, 8AM (local time) - 16ft (5.0m), 18s period, WSW swell with cross-onshore winds.
- Most powerful swell: Wednesday 26 Aug, 8AM (local time) - 16ft (5.0m), 18s period, WSW swell with 17,220 kJ wave energy.
- Next surfable swell (1★+): Friday 21 Aug, 5AM (local time) - 11ft (3.5m), 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 5AM. The primary swell is predicted to be 3.5m and 15s period with a secondary swell of 0.1m and 26s. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Cobblestones in the next 16 days are 5.0m 18s and forecast to arrive on Wednesday (Aug 26) at 8AM. 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+) | 5AM (Fri 21st Aug) | 11ft (3.5m) 15s |
| Best Surf | 8AM (Wed 26th Aug) | 16ft (5.0m) 18s |
| Most Powerful | 8AM (Wed 26th Aug) | 16ft (5.0m) 18s |
Table - best surf conditions forecast for Cobblestones over the next 16 days.
The Lowdown
Alright, let’s get into it. This is Rusty comin’ at you from the beach. We’ve got a solid run of swell on the way for Cobblestones, but it’s gonna be a mixed bag if you’re not an expert.
The first real standout is Friday 21st August morning at Cobblestones (reef). We’re waking up to a *glassed-off* ocean, and that’s rare magic. The swell is a solid 12 ft from the SW with a long, juicy period of 14 seconds. The combined wave energy is in the very strong range at 5427. This is groundswell, and on a reef break like this, it’s gonna line up and pitch. The water is running at 66°, which is a touch warmer than normal for this time of year. This is a session for the experienced crew only—beginners would be in way over their head. The wind is dead calm, so you’re looking at clean, peeling pits. The crowd profile says “sometimes,” so you might have company, but it’ll be worth it.
Friday afternoon drops off quick. The wind swings around to a light cross-onshore, and it’s marginal.
The next real window that gets the blood pumping is Monday 24th August morning. The swell is still a meaty 10 ft from the SW (period 14 seconds, energy 3091) but the wind is a light cross-offshore from the N, keeping things clean. It’s excellent for experienced surfers. The crowds might still be a factor, but clean 10 ft reef waves are hard to say no to.
Wednesday 26th August morning is a special note, but not for the faint of heart. The swell jumps to a massive 16 ft from the WSW with a long period of 17 seconds and energy screaming at 16085. That’s a big, powerful ocean. The trouble is, the break is predicted to be too big even for this spot. This is expert-only territory, and only if you know the reef inside out. The wind is a light onshore, making it tricky.
Looking further out: The last solid chance comes on Saturday 29th August morning. The swell drops to a more friendly 6 ft from the SW with period 13 seconds and energy 1822. The wind is offshore from the NE, light, so you’ll have clean lines. It’s excellent for experienced surfers, and the smaller size opens it up for some ambitious intermediates with a bit of reef knowledge.
Between these sessions, expect long stretches of poor conditions with strong, choppy winds or massive, messy swell from the 26th afternoon onward into early September. There’s a classic pattern here: a beautiful glassy start, a few clean opportunities next week, and then a big, blown-out end.
So, the *true standout* is Friday 21st August morning—glass, 12 ft, and a reef. That’s the one to call in sick for. The second best is Monday 24th August morning for the clean cross-off on a solid 10 ft.
Stay safe out there.
- Rusty
Short Range ForecastSome drizzle, heaviest during Sun morning. Very mild (max 15°C on Fri morning, min 11°C on Sun night). Wind will be generally light. | Days 4-6 Weather SummaryHeavy rain (total 28mm), heaviest during Wed morning. Very mild (max 17°C on Tue morning, min 10°C on Mon morning). Winds increasing (light winds from the ENE on Mon morning, fresh winds from the NW by Tue morning). | ||||||||||||||||||||
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 | WSW 16 | SW 15 | SW 14 | SW 13 | WSW 12 | WSW 15 | WSW 14 | WSW 15 | WSW 17 | WSW 17 | SW 16 | SW 14 | SW 14 | SW 13 |
Wave Graph | |||||||||||||||||||||
5285 | 4654 | 3195 | 4301 | 3283 | 1785 | 2187 | 2128 | 5358 | 3091 | 2241 | 1640 | 3371 | 4183 | 7330 | 16085 | 13103 | 10754 | 7008 | 5191 | 3126 | |
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 | cross-on | cross-on | cross-off | cross-off | cross | cross-on | cross | cross-on | on | cross-on | cross-on | cross-on | on | 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 | — | — | — | — | — | 1 | 4 | 4 | 16 | 2 | 1 | 1 | — | — |
Temp °C | 15 | 15 | 14 | 15 | 15 | 14 | 15 | 14 | 13 | 13 | 15 | 15 | 17 | 16 | 16 | 13 | 15 | 14 | 15 | 15 | 14 |
Feels °C | 14 | 13 | 11 | 12 | 10 | 9 | 11 | 9 | 9 | 10 | 11 | 10 | 12 | 14 | 14 | 10 | 7 | 6 | 10 | 10 | 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 15 | SW 14 | SW 13 | WSW 12 | WSW 15 | WSW 14 | WSW 15 | WSW 17 | WSW 17 | — | SW 14 | SW 14 | SW 13 |
5285 | 4654 | 3195 | 4301 | 3283 | 1785 | 2187 | 2013 | 5358 | 3091 | 2241 | 1640 | 3371 | 4183 | 7330 | 16085 | 13103 | — | 7008 | 5191 | 3126 | |
Swell 2 Height (m) Direction Period (s) | SW 24 | SW 20 | SW 17 | — | — | WSW 20 | WSW 18 | WSW 16 | — | — | — | SW 18 | — | — | S 12 | — | S 12 | — | — | — | — |
142 | 1261 | 2719 | — | — | 75 | 448 | 2128 | — | — | — | 255 | — | — | 11 | — | 11 | — | — | — | — | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | SW 18 | — | — | — | — | — | — | — | — | — |
— | — | — | — | — | — | — | — | — | — | — | 255 | — | — | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | SSW 4 | SSW 4 | — | — | — | — | — | NNW 4 | NNW 5 | NW 6 | — | — | — | SW 16 | — | — | — |
— | — | — | — | 18 | 21 | — | — | — | — | — | 11 | 24 | 171 | — | — | — | 10754 | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 1 | 0 | 20 | 89 | 20 | 20 | 1689 | 0 | 0 | 279 | 53 | 220 | 2 | 38 | 20 | 359 | 89 | 2 | 2 | 1 |
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.











