Cobblestones Surf Break

Lat Long: 33.88° S 114.98° E

Cobblestones Surf Forecast and Surf Report

Issued: 7 am 04 Sep 2026 (local time)

Forecast update in  hr  min

Today's Cobblestones sea temperature is
18.4°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 4 Sep 2026:

  • Best quality surf: Sunday 6 Sep, 5PM (local time) - 15ft (4.5m), 17s period, SW swell with cross-shore winds.
  • Most powerful swell: Sunday 6 Sep, 8PM (local time) - 15ft (4.5m), 17s period, SW swell with 12,615 kJ wave energy.
  • Next surfable swell (1★+): Sunday 6 Sep, 5PM (local time) - 15ft (4.5m), 17s 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 Sunday (Sep 06) at 5PM. The primary swell is predicted to be 4.5m and 17s period with a secondary swell of 3.0m and 18s. Another secondary swell of 2.1m and 8s is also forecast. The wind is predicted to be cross-shore as the swell arrives.

The most powerful waves expected at Cobblestones in the next 16 days are 4.5m 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 1.3m 5s period and expected on Tuesday (Sep 08) at 8PM.

Wave TypeTime (AWST) & Date Wave Height & Period
Next good surf (1 star+) 5PM (Sun 6th Sep)15ft (4.5m) 17s
Best Surf 5PM (Sun 6th Sep)15ft (4.5m) 17s
Most Powerful 8PM (Sun 6th Sep)15ft (4.5m) 17s

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


The Lowdown

Alright, Rusty here, let's break down what's cookin'.

We've got a decent stretch of solid groundswell on the way, but there's a lot of noise to wade through. It’s not going to be an easy week of picking off clean ones; a lot of these sessions are going to be a battle with the wind.

First up, the water’s running a little warmer than usual for this time of year, sitting at 65°F.

The primary spot in the crosshairs is Cobblestones. This is an advanced reef break, and it's exposed, so it grabs the energy well. The opening Friday, September 4th, is a write-off. We’re looking at an 18 ft SW swell, but with a nasty 19 mph cross-on wind, the conditions are just poor. Combined swell energy is 9177, which is strong, but it's a messy, lumpy mess.

Saturday the 5th is more of the same; the swell drops but the wind stays cross-shore and lumpy. Not worth paddling out for.

The real standout here is Sunday afternoon, September 6th. This is the big one. The swell direction is SW, but it jumps up to a solid 15 ft and the period stretches out to a very long 17 seconds. The combined energy is massive at 17162, which means there’s a ton of power in the water. The wind and tide are favorable, but the forecast says it might actually be too big for the break. This is a situation for the experts only—if you’re not charging, you’ll be watching from the cliff.

Monday, September 7th, cleans up nicely. The swell drops to a still-chunky 12 ft from the SW with a 16-second period, but the morning has a light cross-offshore breeze from the SE at 9 mph. The energy is strong (6963), and the conditions turn glassy and clean. This is a very solid option for an expert charger looking for some big, organized lines.

Tuesday the 8th is also promising, with clean conditions in the morning and a 13 ft SW swell. The period holds at 16 seconds and the combined energy is 9134. The wind is a gentle cross-off, keeping things pretty tidy.

Wednesday the 9th morning offers a rare treat: an offshore wind from the NE at 16 mph. Even though the swell has backed off to 12 ft, the offshore wind is a major positive. This will be clean, with moderate energy (5324). A really good call for experienced surfers.

From Thursday the 10th onwards, the pattern gets smaller and more inconsistent. Thursday the 10th afternoon brings a clean 6 ft swell, and Friday the 11th morning has a very long period of 20 seconds coming from the WSW, with only a 6 ft height and light wind. That long period will make for some beautiful, slow lines if you can find the right take-off spot.

We hit a rough patch from Saturday the 12th through the 14th, where strong winds and big, messy swell make it a kite-surfing setup rather than a good paddle session.

The last true standout to mark on your calendar is Tuesday morning, September 15th. The swell is back to 12 ft from the SW with a 13-second period. The combined energy is moderate (4173), but the wind is dead calm. Glassy. That’s the kind of morning you dream about.

After that, it gets tricky. The following Thursday morning, September 17th, has some potential with an 12 ft SW swell and a 17-second period, but the cross-off wind conditions are marginal at best. The rest of the forecast into the 19th gets blown out by strong onshore winds.

So, if you had to pick one, it's Sunday afternoon the 6th for the sheer power, or Tuesday morning the 15th for the perfect, glassy conditions.

Rusty.

Short Range Forecast

Light rain (total 8mm), mostly falling on Sat afternoon. Very mild (max 16°C on Sat morning, min 10°C on Sun night). Winds increasing (light winds from the W on Fri night, strong winds from the S by Sat night).

Days 4-6 Weather Summary

Mostly dry. Very mild (max 19°C on Tue afternoon, min 10°C on Mon morning). Wind will be generally light.

Friday
4
Saturday
5
Sunday
6
Monday
7
Tuesday
8
Wednesday
9
Thursday
10
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
6
0
3
0
0
3
!
8
7
4
6
8
7
6
6
4
3
2
4
4
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
5.5
SW
13
5
SW
14
4.5
SW
14
3.5
SW
14
3
WSW
13
5
SSW
11
3.5
SW
13
4.5
SW
17
4
SW
17
3.5
SW
16
3.5
SW
16
4
SW
15
4
SW
16
4
SW
17
3.5
SW
16
3.5
SW
15
3
SW
15
2.5
SW
15
2
SW
14
1.7
WSW
14
1.8
WSW
14
Wave Graph
Metric surfscale
Energy kJ
9027
9925
8018
4646
2889
5680
4434
11892
9849
6963
5937
6589
9134
9104
6525
5324
4086
2784
1604
1127
1301
Wind (km/h)
30
SW
15
WSW
20
NW
30
NW
25
WNW
40
SSE
30
SSE
30
SSE
15
ESE
15
SE
25
SSE
20
ESE
20
SE
15
SSE
20
E
25
NE
5
SSE
25
ENE
25
NE
10
NE
15
ENE
Wind State
cross-on
on
cross-on
cross
cross-on
cross
cross
cross
cross-off
cross-off
cross
cross-off
cross-off
cross
cross-off
off
cross
off
cross-off
cross-off
off
High Tide
2:47AM0.85m
5:24AM0.86m
6:53AM0.88m
7:55AM0.87m
00:50AM0.59m
8:46AM0.83m
11:34PM0.54m
9:30AM0.77m
10:58PM0.54m
Low Tide
1:59PM0.24m
2:41PM0.19m
3:20PM0.18m
3:55PM0.19m
4:26PM0.23m
1:13AM0.59m
4:50PM0.28m
2:42AM0.51m
5:02PM0.34m
3:34AM0.45m
part cloud
part cloud
part cloud
rain showers
rain showers
rain showers
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:35
6:33
6:31
6:31
6:30
6:28
6:26
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:02
6:04
6:04
6:05
6:06
6:06
6:07
 mm
2
3
3
Temp °C
14
13
14
16
16
15
15
15
12
13
17
13
15
19
16
16
19
19
17
18
18
Feels °C
6
7
9
10
9
11
7
7
7
9
13
8
10
15
12
11
15
16
12
14
16
  • 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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