
Surf Forecasts:
Cobblestones surf forecast from 2 Sep 2026:
- Best quality surf: Sunday 6 Sep, 11PM (local time) - 15ft (4.5m), 17s period, SW swell with cross-offshore winds.
- Most powerful swell: Sunday 6 Sep, 8PM (local time) - 16ft (5.0m), 17s period, SW swell with 13,597 kJ wave energy.
- Next surfable swell (1★+): Wednesday 2 Sep, 11PM (local time) - 11ft (3.5m), 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 Wednesday (Sep 02) at 11PM. The primary swell is predicted to be 3.5m and 14s 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 Sunday (Sep 06) at 8PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.0m 5s period and expected on Wednesday (Sep 09) at 2PM.
| Wave Type | Time (AWST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11PM (Wed 2nd Sep) | 11ft (3.5m) 14s |
| Best Surf | 11PM (Sun 6th Sep) | 15ft (4.5m) 17s |
| Most Powerful | 8PM (Sun 6th Sep) | 16ft (5.0m) 17s |
Table - best surf conditions forecast for Cobblestones over the next 16 days.
The Lowdown
G’day, it’s Rusty here. Let’s have a look at what’s on the cards for Cobblestones. It’s a reef break, and it needs a decent SSW swell to get going, which we’ve got plenty of in the forecast. Water temp is sittin’ at 65°, which is a touch warmer than usual for this time of year – not a big deal, but you might get away with a slightly thinner suit.
We’ve got a bit of a slow start though. The first couple of days are looking pretty ordinary, with onshore junk and some serious size but no shape. Wednesday the 2nd is basically a write-off – moderate onshore wind and 12ft of bumpy chaos, with weak energy (4332) to boot. Thursday the 3rd is also average, and Friday morning looks like a washing machine. It’s not until Friday afternoon that things start to come together. The wind swings light onshore, but the swell jumps to a solid 16ft at 15 seconds from the WSW, and the energy jumps right up (11313). It’s big, but it’s got some punch. That’s a spike, but it might be a bit much for the faint-hearted.
Saturday is blown out – a near gale from the SSW will chop it up. Forget it.
Sunday the 6th is where it gets proper. You’ve got a fresh cross-shore breeze in the morning, but a clean 15ft at 13 seconds under sunny skies. The afternoon gets better: the wind drops to a moderate cross-shore, and the swell bumps up to 15ft at a long 17 seconds from the WSW (12119 energy). That’s a lot of water moving, and it’ll be a heavy one. Monday the 7th stays solid with a gentle cross-shore in the morning, 13ft at 16 seconds – still good.
Now, the standout. Tuesday the 8th. The wind goes light and cross-offshore, and we’ve got a clean 13ft SW groundswell at 16 seconds (7475). That’s the pick of the first week – glassy, lined-up, and proper reef waves. It’s an expert wave at this size, but for those who know what they're doing, it's on. Wednesday the 9th has a nice offshore breeze in the morning, but the swell has dropped a touch to 12ft. Still good, but not the same as Tuesday.
The swell backs off a bit mid-week, dropping to 7ft on Thursday the 10th, but it’s clean. The second week is more about smaller, cleaner windows. Friday the 11th is a dud – onshore junk again. But hold on, Saturday the 12th. That’s a special one. A light offshore cross-off breeze, and a solid 13ft SW swell at 16 seconds rolling in. That’s another standout – clean, powerful, and all over the reef. The Sunday after that is onshore, but still big at 13ft, just not as clean.
From there on, things taper off. Monday the 14th has a glassy morning with 10ft, which is still fun for the experienced, but the energy is dropping (4123). The rest of that week sees the swell easing into the 6ft to 8ft range, with light winds and occasional clean windows. The energy is weak by then, under 2000, so it’s not going to be anything special.
So, the two real standouts are Tuesday the 8th and Saturday the 12th. Both have that clean, powerful groundswell, and the winds are right. It’s going to be crowded, and it’s a solid size, so bring your big board and your nerve. For the rest, pick your windows, and stay away from the onshore days. It’s a solid run for a reef that needs a big SW push. Catch ya out there.
Rusty
Short Range ForecastLight rain (total 5mm), mostly falling on Thu night. Very mild (max 16°C on Wed afternoon, min 13°C on Wed night). Winds increasing (calm on Wed night, strong winds from the W by Thu night). | Days 5-7 Weather SummaryModerate rain (total 13mm), heaviest on Sat afternoon. Very mild (max 16°C on Sat afternoon, min 11°C on Sat afternoon). Winds decreasing (near gales from the SSW on Sat night, light winds from the SE by Mon morning). | |||||||||||||||||||
Wed 2 | Thursday 3 | Friday 4 | Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | ||||||||||||||
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 14 | SW 15 | SW 14 | WSW 11 | SW 13 | WSW 15 | SW 14 | WSW 14 | SW 10 | SW 12 | SW 13 | WSW 17 | SW 17 | SW 16 | SW 16 | SW 15 | SW 16 | WSW 16 | SW 16 |
Wave Graph | ||||||||||||||||||||
4332 | 6168 | 6809 | 4692 | 5852 | 8766 | 11146 | 7811 | 3380 | 4939 | 8878 | 6586 | 11724 | 10558 | 7409 | 6128 | 5924 | 7475 | 6662 | 6647 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-off | cross | cross-on | on | cross-on | on | cross-on | cross | cross-on | cross | cross | cross | cross-off | cross | cross | cross-off | cross-off | cross | off |
High Tide | 00:29AM0.82m | 1:15AM0.84m | 2:47AM0.85m | 5:24AM0.86m | 6:53AM0.88m | 7:55AM0.87m | 00:50AM0.59m | |||||||||||||
Low Tide | 1:11PM0.31m | 1:59PM0.24m | 2:41PM0.19m | 3:20PM0.18m | 3:55PM0.19m | 4:26PM0.23m | 1:13AM0.59m | |||||||||||||
— | — | 6:35 | — | — | 6:35 | — | — | 6:33 | — | — | 6:31 | — | — | 6:31 | — | — | 6:30 | — | — | |
6:01 | — | — | 6:01 | — | — | 6:02 | — | — | 6:04 | — | — | 6:04 | — | — | 6:05 | — | — | 6:06 | — | |
mm | — | — | — | — | 3 | — | — | — | 2 | 11 | 2 | — | — | — | — | — | — | — | — | — |
Temp °C | 16 | 15 | 16 | 16 | 16 | 15 | 13 | 14 | 15 | 16 | 13 | 14 | 15 | 13 | 13 | 15 | 13 | 15 | 19 | 16 |
Feels °C | 11 | 12 | 10 | 9 | 8 | 8 | 8 | 10 | 9 | 8 | 0 | 6 | 7 | 9 | 10 | 11 | 8 | 12 | 16 | 12 |
Swell 1 Height (m) Direction Period (s) | SW 13 | SW 14 | SW 15 | SW 14 | SW 18 | SW 13 | WSW 15 | SW 14 | WSW 14 | — | WSW 22 | SW 13 | WSW 17 | SW 17 | SW 16 | SW 16 | SW 15 | SW 16 | WSW 16 | SW 16 |
4332 | 6168 | 6809 | 4692 | 392 | 8766 | 11146 | 7811 | 3380 | — | 46 | 6586 | 11724 | 10558 | 7409 | 6128 | 5924 | 7475 | 6662 | 6647 | |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | S 15 | S 15 | S 11 | — | — | SW 19 | — | SSE 11 | — | — | SSE 9 | — | — | — |
— | — | — | — | — | — | 112 | 72 | 426 | — | — | 819 | — | 40 | — | — | 8 | — | — | — | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | SSE 13 | — | — | — | — | — | — | S 11 | — | — | — | — | — | — |
— | — | — | — | — | — | 55 | — | — | — | — | — | — | 61 | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | — | — | — | WNW 6 | WSW 11 | — | — | — | WNW 6 | SW 10 | SW 12 | SSE 9 | S 9 | — | — | — | — | — | — | — |
— | — | — | 291 | 5852 | — | — | — | 238 | 4939 | 8878 | 600 | 395 | — | — | — | — | — | — | — | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 31 | 0 | 201 | 251 | 1689 | 2014 | 2 | 201 | 201 | 251 | 630 | 1689 | 31 | 0 | 0 | 31 | 1 | 0 | 1 | 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.










