
Surf Forecasts:
Cobblestones surf forecast from 10 Sep 2026:
- Best quality surf: Monday 14 Sep, 11AM (local time) - 13ft (4.0m), 14s period, SW swell with offshore winds.
- Most powerful swell: Saturday 12 Sep, 5AM (local time) - 13ft (4.0m), 16s period, WSW swell with 8,438 kJ wave energy.
- Next surfable swell (1★+): Thursday 10 Sep, 11PM (local time) - 7ft (2.1m), 16s 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 Thursday (Sep 10) at 11PM. The primary swell is predicted to be 2.1m and 16s period with a secondary swell of 0.7m and 21s. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Cobblestones in the next 16 days are 4.0m 16s and forecast to arrive on Saturday (Sep 12) at 5AM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.6m 6s period and expected on Friday (Sep 11) at 11AM.
| Wave Type | Time (AWST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11PM (Thu 10th Sep) | 7ft (2.1m) 16s |
| Best Surf | 11AM (Mon 14th Sep) | 13ft (4.0m) 14s |
| Most Powerful | 5AM (Sat 12th Sep) | 13ft (4.0m) 16s |
Table - best surf conditions forecast for Cobblestones over the next 16 days.
The Lowdown
Alright folks, Rusty here. I’ve been staring at the charts for this zone and it’s a bit of a mixed bag for the next 16 days. We’ve got some serious size coming through at times, but the wind is going to be the main character, and not always in a good way.
The first few days are a write-off for decent waves. Friday the 11th and Saturday the 12th have serious swell, but the wind is howling onshore or cross-shore, making it a messy, choppy mess. Sunday the 13th is the same story – big, raw, and ugly. If you’re looking for a decent paddle, you’ll have to wait until Monday the 14th.
The standout window starts on Monday morning, September 14th. We’ve got a solid 13ft groundswell out of the SW, with a very long period of 14 seconds. The wind is a clean offshore breeze from the East, which is a massive plus. This is going to be a powerful, heavy wave at Cobblestones, and with combined energy hitting 5794, it’s a serious amount of water moving around. This is strictly for experts. It’s got a lot of energy and the tide will be a factor, so you need to know what you’re doing. The water temps are pretty standard for this time of year, nothing unusual there.
After that, Tuesday the 15th morning is another gem. The swell drops slightly to 12ft from the SW, but the wind goes glassy. It’s going to be a clean, smooth morning session. The energy is still very high (4375), so it’s still a big wave day for experienced surfers. The afternoon will get choppy again as the wind picks up.
The middle of the week (Wednesday 16th and Thursday 17th) drops off significantly in size, with the wind switching around and making it marginal. It’s not worth the effort.
Now, hold on to your boardies, because the second week looks like it could be the real deal. The 20th of September sees a new pulse of SW swell arriving, building to 13ft by Sunday afternoon. The wind is a cross-onshore, which is a bit of a bummer, but the energy is massive (7245). It’s going to be a bit lumpy, but there will be some bombs.
The absolute standout, however, is looking like Monday the 21st and Tuesday the 22nd. The swell is going to peak at a pumping 16ft from the SW on Monday, with a period of 14 seconds. The combined energy is off the charts at 9969. That’s a lot of power. Early on Monday the wind is light onshore, but by Tuesday the 22nd it swings to a cross-offshore SE breeze, cleaning it right up. This is a massive, powerful swell for experts only. At 16ft, this is not for the faint of heart.
The energy remains strong through the 24th and 25th, with clean conditions and a solid 10ft groundswell on offer. That Friday the 25th morning with light offshore winds looks like a proper session for those who can handle the size.
Overall, this is a period of real extremes. The first week has a couple of excellent days for experts, but the second week, starting around the 20th, has the potential to be truly epic for the big-wave crew. Stick with the morning sessions when the wind is best.
Rusty.
Short Range ForecastLight rain (total 4mm), mostly falling on Fri night. Very mild (max 18°C on Fri afternoon, min 15°C on Thu night). Winds increasing (light winds from the ESE on Thu night, strong winds from the WNW by Fri night). | Days 5-7 Weather SummaryMostly dry. Warm (max 21°C on Wed morning, min 11°C on Mon night). Wind will be generally light. | ||||||||||||||||||
Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | ||||||||||||||
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 15 | WSW 16 | WSW 18 | W 17 | WSW 16 | WSW 15 | WSW 14 | WSW 13 | WSW 15 | WSW 14 | SW 14 | SW 14 | SW 14 | SW 14 | SW 14 | SW 14 | SW 16 | SW 14 | WSW 14 |
Wave Graph | |||||||||||||||||||
2070 | 2172 | 4724 | 6640 | 3211 | 5138 | 3278 | 2993 | 5987 | 5573 | 5794 | 5472 | 4912 | 4375 | 3725 | 2392 | 2796 | 2155 | 1310 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | cross-off | cross-off | cross-on | on | cross-on | cross-on | cross-on | cross-on | cross | off | cross-on | cross-off | glassy | cross | off | cross-off | cross | cross |
High Tide | 10:58PM0.54m | 10:08AM0.69m | 10:34PM0.56m | 10:39AM0.60m | 10:24PM0.61m | 11:00AM0.51m | 10:28PM0.67m | 10:57AM0.43m | 10:43PM0.72m | 9:41AM0.38m | 11:04PM0.76m | 11:28PM0.79m | |||||||
Low Tide | 3:34AM0.45m | 4:57PM0.40m | 4:22AM0.40m | 4:28PM0.44m | 5:12AM0.37m | 3:38PM0.43m | 6:09AM0.37m | 2:41PM0.40m | 7:39AM0.38m | 2:06PM0.35m | 2:02PM0.31m | ||||||||
— | 6:26 | — | — | 6:24 | — | — | 6:22 | — | — | 6:22 | — | — | 6:20 | — | — | 6:18 | — | — | |
6:07 | — | 6:07 | — | — | 6:07 | — | — | 6:08 | — | — | 6:09 | — | — | 6:10 | — | — | 6:10 | — | |
mm | — | — | — | 4 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 16 | 17 | 18 | 18 | 15 | 16 | 16 | 17 | 17 | 17 | 16 | 18 | 15 | 19 | 19 | 19 | 21 | 21 | 18 |
Feels °C | 13 | 11 | 13 | 12 | 8 | 11 | 11 | 12 | 12 | 14 | 14 | 17 | 11 | 19 | 15 | 19 | 19 | 19 | 18 |
Swell 1 Height (m) Direction Period (s) | WSW 15 | WSW 16 | WSW 18 | — | WSW 16 | WSW 15 | WSW 14 | WSW 13 | WSW 15 | WSW 14 | SW 14 | SW 14 | SW 14 | SW 14 | SW 14 | SW 14 | SW 16 | SW 14 | WSW 14 |
2070 | 2172 | 4724 | — | 3211 | 5138 | 3278 | 2993 | 5987 | 5573 | 5794 | 5472 | 4912 | 4375 | 3725 | 2392 | 2796 | 2155 | 1310 | |
Swell 2 Height (m) Direction Period (s) | S 11 | WSW 19 | SSE 13 | — | — | S 11 | WSW 19 | WSW 17 | — | — | — | — | — | — | — | — | — | SW 22 | S 11 |
37 | 1395 | 17 | — | — | 2 | 274 | 924 | — | — | — | — | — | — | — | — | — | 18 | 89 | |
Swell 3 Height (m) Direction Period (s) | — | S 11 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | WSW 20 |
— | 9 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 40 | |
Wind waves Height (m) Direction Period (s) | N 6 | N 6 | N 6 | W 17 | W 9 | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
24 | 169 | 137 | 6640 | 1198 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 0 | 143 | 53 | 220 | 1106 | 359 | 201 | 359 | 2435 | 0 | 0 | 20 | 0 | 0 | 64 | 0 | 44 | 53 | 53 |
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.










