Cobblestones Surf Break

Lat Long: 33.88° S 114.98° E

Cobblestones Surf Forecast and Surf Report

Issued: 7 am 12 Sep 2026 (local time)

Forecast update in  hr  min

Today's Cobblestones sea temperature is
18.1°C
1.1° 

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


Cobblestones surf forecast from 12 Sep 2026:

  • Best quality surf: Tuesday 15 Sep, 5AM (local time) - 11ft (3.5m), 14s period, SW swell with offshore winds.
  • Most powerful swell: Saturday 19 Sep, 2PM (local time) - 15ft (4.5m), 13s period, SW swell with 7,214 kJ wave energy.
  • Next surfable swell (1★+): Tuesday 15 Sep, 5AM (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 Tuesday (Sep 15) at 5AM. The primary swell is predicted to be 3.5m and 14s period with a secondary swell of 0.4m and 19s. The wind is predicted to be offshore as the swell arrives.

The most powerful waves expected at Cobblestones in the next 16 days are 4.5m 13s and forecast to arrive on Saturday (Sep 19) at 2PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.9m 7s period and expected on Friday (Sep 18) at 2PM.

Wave TypeTime (AWST) & Date Wave Height & Period
Next good surf (1 star+) 5AM (Tue 15th Sep)11ft (3.5m) 14s
Best Surf 5AM (Tue 15th Sep)11ft (3.5m) 14s
Most Powerful 2PM (Sat 19th Sep)15ft (4.5m) 13s

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


The Lowdown

Alright folks, Rusty here. Let’s look at what we’ve got coming up for Cobblestones. This is a solid, exposed reef break for advanced surfers only, and it likes the swell coming from the SSW. The water temperature is sitting at a touch warmer than normal for the time of year, around 65°.

Okay, the first part of this forecast is a bit of a write-off, I’m not gonna lie. We’ve got a big pulse of swell rolling in from Saturday the 12th through Sunday the 13th, with heights hitting 10ft to 12ft, but the wind is blowing hard from the west, tough cross-onshore junk, and the wave state is just poor. The combined energy is massive though, but it’s not doing us any favours with that wind.

We finally start to see a window of opportunity on Monday morning, September 14th. The wind swings around to the ESE, becoming a cleaner cross-offshore breeze, settling surf to a clean 13ft from the SW with a long 14-second period. The combined energy is still pumped up, making for a powerful, grinding reef wave. It is a big day though, over 8ft, so this is strictly for the experienced crew.

Tuesday the 15th is the standout of the first week. We get a beautiful, clear morning with the wind going light offshore from the east at just 6 mph. The swell is a heavy 10ft from the SW, with a long 14-second groundswell period. That long period will make the sets fat and powerful, perfect for this reef. With light winds, it’ll be clean and lined up for the experts. This is the one to circle if you’ve got the skills.

Wednesday the 16th drops a little, with the swell easing to 6ft, but the wind stays clean from the north. Still a good window for the expert crew.

Now, the forecast gets rough again from the 18th through the 19th with gale-force cross-onshore winds and poor conditions. That stretch is better off left to the kites, not the paddlers. We see a real dirty Sunday morning on the 20th too, exposed and choppy, but wait for it.

The real gold is sitting over a week away. The morning of Sunday, September 20th is dead glassy, with a light WNW breeze, and a solid 13ft SW groundswell (13-second period). The energy is huge, but the glassy conditions will make it look like a dream. That one has “exceptional” written all over it for the experts.

But the absolute best on offer, the one to dream about, is Monday morning, September 21st. Clear skies, a gentle cross-offshore breeze from the ESE at 9 mph, and a massive 13ft SW swell with a very long 16-second period. The combined energy is pumping. That is a proper, long-period groundswell hitting this reef with perfect wind. It’s a standout, but remember we’re looking at a date more than a week out, so keep an eye on it.

After that, you have another standout window on Thursday the 24th. Zero wind, glassy conditions, and a 16ft SW swell with a 17-second period – that’s incredible energy and a dream setup for the absolute experts.

The last few days of the window get blown out again. For now, the second week looks way more promising than the first if you can handle the size.

Rusty.

Short Range Forecast

Mostly dry. Very mild (max 17°C on Sun afternoon, min 10°C on Mon night). Winds decreasing (fresh winds from the WSW on Sat morning, light winds from the SSE by Mon afternoon).

Days 4-6 Weather Summary

Mostly dry. Warm (max 22°C on Wed afternoon, min 12°C on Tue morning). Winds increasing (light winds from the SSE on Tue afternoon, strong winds from the N by Thu night).

Saturday
12
Sunday
13
Monday
14
Tuesday
15
Wednesday
16
Thursday
17
Friday
18
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
0
0
0
0
0
4
5
5
3
5
4
4
2
4
4
2
3
1
0
0
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
3.5
WSW
10
3
WSW
10
3
WSW
14
3
WSW
13
3.5
WSW
14
4
WSW
14
4
SW
14
4
SW
14
3.5
SW
14
3
SW
14
3
SW
14
2.5
SW
14
1.9
SW
14
1.5
SW
13
1.7
WSW
15
1.7
WSW
14
1.7
WSW
13
1.8
WSW
12
2.5
WSW
12
2.5
WSW
12
3
WSW
15
Wave Graph
Metric surfscale
Energy kJ
2285
1919
3446
3186
5603
5722
5730
5524
4691
3953
3569
2424
1304
721
1158
1210
1018
970
1893
1863
4822
Wind (km/h)
25
W
25
W
30
WNW
25
WNW
20
W
20
SSE
15
ESE
20
SE
25
E
10
E
5
SSE
25
ENE
25
NE
15
N
15
NE
20
NNW
25
N
35
N
50
WNW
65
WNW
55
W
Wind State
on
cross-on
cross-on
cross-on
cross-on
cross
cross-off
cross-off
cross-off
off
cross
off
cross-off
cross-off
cross-off
cross
cross-off
cross-off
cross-on
cross-on
cross-on
High Tide
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
11:55PM0.81m
00:25AM0.81m
Low Tide
4:28PM0.44m
5:12AM0.37m
3:38PM0.43m
6:09AM0.37m
2:41PM0.40m
7:39AM0.38m
2:06PM0.35m
2:02PM0.31m
2:13PM0.28m
2:26PM0.27m
part cloud
clear
part cloud
cloud
cloud
cloud
part cloud
part cloud
clear
clear
clear
clear
clear
clear
clear
part cloud
cloud
part cloud
heavy rain
light rain
light rain
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:24
6:22
6:22
6:20
6:18
6:16
6:16
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:07
6:08
6:09
6:10
6:10
6:12
6:13
 mm
12
2
2
Temp °C
16
16
16
16
17
17
15
17
15
18
21
19
20
22
21
18
18
18
15
14
15
Feels °C
10
11
12
11
12
14
12
15
10
16
20
16
16
19
21
18
17
15
5
1
4
  • Map Icons:
  • Break
  • 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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