Cobblestones Surf Break

Lat Long: 33.88° S 114.98° E

Cobblestones Surf Forecast and Surf Report

Issued: 7 am 09 Sep 2026 (local time)

Forecast update in  hr  min

Today's Cobblestones sea temperature is
18.2°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 9 Sep 2026:

  • Best quality surf: Monday 14 Sep, 11AM (local time) - 11ft (3.5m), 14s period, WSW swell with cross-offshore winds.
  • Most powerful swell: Monday 14 Sep, 5PM (local time) - 13ft (4.0m), 14s period, WSW swell with 5,956 kJ wave energy.
  • Next surfable swell (1★+): Wednesday 9 Sep, 5PM (local time) - 10ft (3.0m), 15s 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 09) at 5PM. The primary swell is predicted to be 3.0m and 15s period. 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 14s and forecast to arrive on Monday (Sep 14) at 5PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.2m 5s period and expected on Friday (Sep 11) at 11AM.

Wave TypeTime (AWST) & Date Wave Height & Period
Next good surf (1 star+) 5PM (Wed 9th Sep)10ft (3.0m) 15s
Best Surf11AM (Mon 14th Sep)11ft (3.5m) 14s
Most Powerful 5PM (Mon 14th Sep)13ft (4.0m) 14s

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


The Lowdown

Alright folks, Rusty here. Let’s break down what’s coming for the only spot on the menu, Cobblestones. This is a reef break that needs a solid SW groundswell, and it’s for the advanced crew only.

The first week has a bit of everything, but the real standout mornings are Monday, September 14th, and Thursday, September 24th.

The water is 65°, which is a touch warmer than normal for this time of year.

We start with a bang on Wednesday the 9th. A solid 10ft SW groundswell is hitting, with a very long period of 15 seconds, and the wind is a glassy offshore from the ENE. The energy is pumping (4064), and it’s clean. This is prime Cobblestones, but the swell is over 8ft, so this is for the experts only. The morning is the pick.

Thursday the 10th sees the swell drop to 7ft, with a cross-offshore wind at 15 mph. It’s clean, but the energy is dropping (2327). The afternoon goes lighter, with a cross-shore wind, so it’s a bit average.

Friday the 11th has a 7ft swell with a 16-second period, but a fresh cross-offshore wind at 18 mph keeps it bumpy. The energy jumps back up (3576). The afternoon gets bigger, 10ft, with a period of 18 seconds, but the wind is still cross-offshore. The energy is massive (4741), but the wind will make it a battle.

Saturday the 12th and Sunday the 13th are a wash. The wind goes onshore, blowing the big 10ft to 12ft swells into a choppy mess. The energy is huge (up to 5647), but the conditions are poor.

Monday the 14th is the first big standout. The morning brings an 12ft SW swell, period of 14 seconds, and a light cross-offshore breeze from the NNE. The energy is massive (5305), and the conditions are exceptional for experts. The afternoon gets a bit onshore, so get it early.

The rest of the week from Tuesday the 15th to Friday the 18th is a grind. The swell hangs around 7ft to 10ft, but the wind is mostly cross-onshore or cross-shore, making it choppy. The energy is moderate to strong (1694 to 2978), but the quality is not there. Friday morning the 18th has a near gale wind, so that’s a no-go.

Saturday the 19th sees a massive jump, with a 16ft swell, but the wind is onshore, making it a total mess. The energy is 11890. The afternoon cleans up a bit with a cross-onshore, but it’s still huge at 15ft.

For the second week, the run from Sunday the 20th to Tuesday the 22nd is dominated by huge, dangerous swell. The 21st and 22nd have swells of 15ft to 18ft, with periods of 17 seconds, and the energy is off the charts (over 11968). The wind is cross-onshore or cross-shore, so it’s a wild, lumpy, and dangerous zoo. The forecast says it’s too big for this break.

Wednesday the 23rd is a letdown, with the swell dropping to 12ft but the wind is onshore again.

Then we get the second standout. Thursday the 24th. The morning brings an 12ft SW groundswell, period of 15 seconds, and a glassy offshore wind from the ENE. The energy is strong (5894), and the conditions are exceptional for experts. The afternoon gets a cross-onshore, so make it a dawn patrol.

For the overall picture, if you’re an advanced surfer, the mornings of September 14th and September 24th are your best bets for clean, powerful Cobblestones. The crowds are “sometimes,” so you might have a few others out, but it won’t be a circus.

Rusty.

Short Range Forecast

Light rain (total 4mm), mostly falling on Fri night. Warm (max 20°C on Wed afternoon, min 9°C on Wed morning). Winds increasing (light winds from the NW on Thu afternoon, fresh winds from the WNW by Fri night).

Days 4-6 Weather Summary

Light rain (total 2mm), mostly falling on Sun night. Very mild (max 17°C on Sun morning, min 13°C on Mon morning). Wind will be generally light.

Wednesday
9
Thursday
10
Friday
11
Saturday
12
Sunday
13
Monday
14
Tuesday
15
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
5
5
4
2
3
4
3
4
0
0
0
0
0
0
4
6
4
5
2
2
5
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
3
SW
15
3
SW
15
2.4
SW
15
2.1
SW
14
2
WSW
15
2.2
WSW
15
2.1
WSW
16
3
WSW
18
2.5
WSW
16
3
WSW
16
3
WSW
15
2.5
WSW
14
3
WSW
14
3.5
WSW
15
3.5
WSW
14
3.5
WSW
14
4
WSW
14
3.5
SW
14
3.5
SW
14
3
SW
14
2.5
SW
14
Wave Graph
Metric surfscale
Energy kJ
4032
3622
2525
1785
1737
2070
2172
4724
3721
4056
3813
2831
3788
5647
4889
5305
5956
5046
4654
3968
2743
Wind (km/h)
20
ENE
10
ENE
25
ENE
25
NE
5
NW
25
NE
30
NNE
25
N
35
WNW
25
W
20
WNW
30
WNW
25
WNW
20
W
15
SSE
10
NNE
15
SSW
20
SE
20
S
25
S
10
ESE
Wind State
off
off
off
cross-off
cross
off
cross-off
cross-off
cross-on
on
cross-on
cross-on
cross-on
cross-on
cross
cross-off
cross-on
cross-off
cross-on
cross
cross-off
High Tide
8:46AM0.83m
11:34PM0.54m
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
Low Tide
4:50PM0.28m
2:42AM0.51m
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
clear
clear
clear
clear
clear
part cloud
part cloud
part cloud
rain showers
clear
clear
part cloud
cloud
clear
rain showers
part cloud
part cloud
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:28
6:26
6:26
6:24
6:22
6:22
6:20
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:06
6:07
6:07
6:07
6:08
6:09
6:10
 mm
4
2
Temp °C
14
20
18
15
19
17
16
18
17
16
16
16
17
17
17
16
16
15
19
19
15
Feels °C
10
17
14
10
18
14
11
13
13
11
12
12
12
12
15
15
15
12
15
13
11
  • 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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