Cobblestones Surf Break

Lat Long: 33.88° S 114.98° E

Cobblestones Surf Forecast and Surf Report

Issued: 1 am 10 Sep 2026 (local time)

Forecast update in  hr  min

Today's Cobblestones sea temperature is
18.0°C
1.0° 

Cobblestones surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


Cobblestones surf forecast from 9 Sep 2026:

  • Best quality surf: Monday 14 Sep, 11AM (local time) - 11ft (3.5m), 14s period, SW swell with cross-offshore winds.
  • Most powerful swell: Saturday 12 Sep, 5AM (local time) - 11ft (3.5m), 16s period, W swell with 5,928 kJ wave energy.
  • Next surfable swell (1★+): Thursday 10 Sep, 5PM (local time) - 6.5ft (2.0m), 15s 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 5PM. The primary swell is predicted to be 2.0m and 15s 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 3.5m 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 1.4m 6s period and expected on Friday (Sep 11) at 11AM.

Wave TypeTime (AWST) & Date Wave Height & Period
Next good surf (1 star+) 5PM (Thu 10th Sep)6.5ft (2.0m) 15s
Best Surf11AM (Mon 14th Sep)11ft (3.5m) 14s
Most Powerful 5AM (Sat 12th Sep)11ft (3.5m) 16s

Table - best surf conditions forecast for Cobblestones over the next 16 days.


The Lowdown

Alright, Rusty here. Let’s talk about what’s coming for Cobblestones.

Right out of the gate, this is a reef setup that knows how to pack a punch, and we’ve got a real mixed bag of conditions over the next couple of weeks. The water is sitting at 64°, which is a degree warmer than average for this time of year, so you can probably get away with a step down in rubber.

The first proper window to look at kicks off on the morning of Thursday the 10th. We’ve got a solid 7ft SW swell at 14 seconds pushing in, and it’s clean with a moderate breeze. The combined energy is sitting at 2327 (moderate), so there’s some real weight behind it. Friday the 11th keeps that momentum going with a similar 7ft SSW groundswell in the morning and building to a hefty 10ft WSW by the afternoon, with periods stretching to 18 seconds – that’s very long period, meaning it’ll turn into proper lines on the reef, but at a beachy it might just stand up too fast. Winds are cross-off both days, so you’ll get some decent shape, but that early Friday wind is up at 30 km/h (19 mph), so it’s gonna be a bit of a wrestle getting out.

Now, during the Saturday the 12th through Sunday the 13th, the wind shifts onshore and it gets rough. Swells stay big – hitting 12ft – but it’s a complete mess. That is not paddle-surfing territory. Honestly, with those strong onshores and the power in the water, you’d have more fun rigging a kite.

Monday the 14th is a standout if you’ve got the skills. The swell is still a solid 12ft from the SW, period at 14 seconds, and the combined energy is cooking at 5302 (strong). But the key is that light easterly cross-off breeze and morning clarity – that window from dawn on Monday is going to be clean, raw, and heavy. This is expert-level territory. Do not take a foamy out there.

From Tuesday the 15th through most of the following week, the conditions are marginal at best. Winds are cross or cross-on, the swell hangs around the 8ft to 10ft range, and while it’s clean-ish at times, the commentary says it’s all fairly choppy or cross-chop heavy. Nothing to get excited about until the 20th of September.

Sunday the 20th is the real killer window. The morning has a 15ft SW groundswell, period of 15 seconds, and a glassy easterly cross-off wind. The energy reading is 7879 (very strong). That is going to be a heavy, clean day of well-formed reef waves for experts. Monday the 21st is nearly as good – same 13ft SW swell, same long period, and light offshore N winds at 10 km/h (6 mph). Another morning of exceptional, clean surf. These two days are the best on offer in this whole 16-day outlook.

After that, it tapers off. Winds pick up again around the 24th and 25th, with the swell dropping a bit but the energy still strong (over 4000), but it’s all onshore and lumpy – a no-go.

So mark your calendar: the real magic is Sunday 20th and Monday 21st of September at Cobblestones. Dawn patrol, expert sticks only, and enjoy the 14ft groundswell.

Rusty.

Short Range Forecast

Light rain (total 3mm), mostly falling on Fri night. Very mild (max 18°C on Thu afternoon, min 11°C on Thu morning). Winds increasing (light winds from the N on Thu afternoon, strong winds from the W by Fri night).

Days 4-6 Weather Summary

Mostly dry. Warm (max 21°C on Tue afternoon, min 12°C on Tue morning). Wind will be generally light.

Thursday
10
Friday
11
Saturday
12
Sunday
13
Monday
14
Tuesday
15
Wednesday
16
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
3
4
4
3
4
2
0
0
0
0
0
5
6
5
4
4
3
4
3
1
3
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
2.1
SW
14
2
WSW
15
2.2
WSW
15
2.1
WSW
16
3
WSW
18
2.5
WSW
16
2.2
WSW
16
3.5
WSW
15
3
WSW
14
3
WSW
14
3.5
WSW
16
3.5
WSW
14
3.5
SW
14
3.5
SW
14
3.5
SW
14
3
SW
14
3
SW
14
2.5
SW
14
2.5
SW
16
2.4
SW
15
2.4
WSW
14
Wave Graph
Metric surfscale
Energy kJ
1785
1737
2070
1997
4724
3721
2386
5031
3495
3137
5659
5023
5302
5627
4814
3954
3373
2724
3178
2491
2313
Wind (km/h)
25
NNE
10
N
20
ENE
30
NNE
25
N
35
NW
30
W
25
W
25
WNW
25
WNW
20
W
15
SSE
10
E
15
SSE
20
E
15
S
20
SSE
10
ESE
15
SSW
20
SSW
10
SSE
Wind State
cross-off
cross-off
off
cross-off
cross-off
cross
on
cross-on
cross-on
cross-on
cross-on
cross
cross-off
cross
cross-off
cross
cross
cross-off
cross-on
cross-on
cross
High Tide
9:30AM0.77m
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
5:02PM0.34m
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
clear
clear
part cloud
part cloud
cloud
rain showers
clear
part cloud
cloud
cloud
cloud
part cloud
part cloud
part cloud
clear
clear
clear
clear
part cloud
part cloud
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:26
6:26
6:24
6:22
6:22
6:20
6:18
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:07
6:07
6:07
6:08
6:09
6:10
6:10
 mm
3
Temp °C
15
18
16
16
17
18
16
16
16
17
17
17
17
17
17
18
21
17
18
17
16
Feels °C
10
16
13
10
12
14
8
10
11
12
12
14
15
16
14
16
18
17
18
16
16
  • Map Icons:
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  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
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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.

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