Cobblestones Surf Break

Lat Long: 33.88° S 114.98° E

Cobblestones Surf Forecast and Surf Report

Issued: 1 pm 29 Aug 2026 (local time)

Forecast update in  hr  min

Today's Cobblestones sea temperature is
18.3°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 29 Aug 2026:

  • Best quality surf: Friday 4 Sep, 8AM (local time) - 21ft (6.5m), 15s period, SW swell with cross-onshore winds.
  • Most powerful swell: Friday 4 Sep, 8AM (local time) - 21ft (6.5m), 15s period, SW swell with 19,611 kJ wave energy.
  • Next surfable swell (1★+): Sunday 30 Aug, 8AM (local time) - 11ft (3.5m), 18s 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 (Aug 30) at 8AM. The primary swell is predicted to be 3.5m and 18s 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 6.5m 15s and forecast to arrive on Friday (Sep 04) at 8AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 6s period and expected on Saturday (Aug 29) at 8PM.

Wave TypeTime (AWST) & Date Wave Height & Period
Next good surf (1 star+) 8AM (Sun 30th Aug)11ft (3.5m) 18s
Best Surf 8AM (Fri 4th Sep)21ft (6.5m) 15s
Most Powerful 8AM (Fri 4th Sep)21ft (6.5m) 15s

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


The Lowdown

Alright, let’s get into it. Cobblestones is the only game in town for this forecast, and it’s a reef break that’s exposed to a south-southwest swell window. The water’s sitting at 65°F, which is a touch warmer than normal for this time of year – nothing crazy, but you’ll notice it’s a little more comfortable than usual.

The standout window kicks off on Saturday afternoon, 29 August. We’ve got a solid 10 ft SW groundswell, with a 17-second period, and a gentle offshore breeze from the east. That’s a recipe for clean, powerful lines at this reef. The combined energy is pumping at 5038, so there’s serious grunt behind those waves. This is for expert surfers only – the size and power are no joke, but the conditions are exceptional.

Sunday morning, 30 August, looks even better on paper. Swell builds to 12 ft from the SW, still with that long 17-second period, and a cross-offshore breeze from the NE keeps it clean. The energy jumps to 6471. This is the best of the early window – big, clean, and powerful. If you’re experienced and hungry, this is your session.

Sunday afternoon, the wind shifts NW and goes cross-shore, the swell drops to 10 ft from the WSW, and the energy drops to 4844. It’s marginal, with some cross-chop, and the tide might be a factor. Not the best, but still surfable for the keen.

From Monday 31 August into early September, things turn ugly. Strong cross-onshore winds, rain, and lumpy, choppy conditions take over. Swell stays around 8 ft to 12 ft, but the wind is a mess. These are poor surf days – I’d stay on the beach.

Then from 4 September, we get a massive pulse of swell – 20 ft on Friday morning, 16 ft through the weekend, all from the SW with 15-16 second periods. The energy readings are huge – 17010, 11477, 10991 – but the wind is howling cross-onshore or onshore, blowing it out. The 20 ft and 16 ft waves are dangerously big for all but the most elite, and the conditions are messy. The 4 September morning actually has a note that the wind and tide are favorable, but the swell is too big for this break. That’s a big red flag.

There’s a brief glimmer on 7 September Monday morning: an 18 ft SW swell at 18 seconds, with a NNW cross-shore breeze. The energy is a massive 16916, but again, it’s flagged as too big for the break. Only experts should even consider it, and even then, it’s a gamble.

From 12 September onward, the swell drops back to 8 ft and 10 ft, but winds are fresh to strong, keeping things lumpy and messy. The 13 September Sunday has a 20 ft WSW swell with a 19-second period and glassy conditions – sounds incredible – but again, it’s marked as too big for the break. The energy is 24686, which is immense.

Bottom line: The best windows are Saturday 29 August afternoon and Sunday 30 August morning. After that, it’s a mix of blown-out, too-big, or marginal conditions. If you’re an expert, those first two sessions are your golden ticket. For everyone else, give it a miss.

– Rusty

Short Range Forecast

Light rain (total 4mm), mostly falling on Mon afternoon. Very mild (max 19°C on Sat afternoon, min 13°C on Sat night). Winds increasing (light winds from the ESE on Sat afternoon, fresh winds from the SSW by Mon afternoon).

Days 5-7 Weather Summary

Moderate rain (total 12mm), heaviest on Thu night. Very mild (max 16°C on Wed morning, min 11°C on Thu night). Winds increasing (light winds from the SW on Wed night, near gales from the SW by Thu night).

Sat
29
Sunday
30
Monday
31
Tuesday
1
Wednesday
2
Thursday
3
Friday
4
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
6
6
7
4
3
0
0
2
2
2
0
0
2
3
0
0
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
SW
17
3
SW
17
3.5
SW
17
3
WSW
16
3
WSW
16
2.5
WSW
17
2.5
WSW
16
3
WSW
16
3
WSW
16
3.5
SW
14
3.5
SW
14
3.5
SW
13
3
SW
13
3
SW
14
3
SW
14
4
WSW
14
5.5
SW
13
6
SW
15
5
SW
15
4.5
SW
14
Wave Graph
Metric surfscale
Energy kJ
5006
6086
6471
4844
3918
3700
3192
4963
4796
4401
4432
3724
3489
3663
3574
5164
8899
17010
11477
7152
Wind (km/h)
15
E
20
ESE
15
NE
15
NW
15
WNW
30
WNW
35
SSW
20
SW
20
WSW
20
W
20
W
20
W
20
SW
10
W
25
WNW
40
WNW
50
WSW
40
SW
25
SW
25
WNW
Wind State
off
cross-off
cross-off
cross
cross-on
cross-on
cross-on
on
on
on
on
on
cross-on
on
cross-on
cross-on
on
cross-on
cross-on
cross-on
High Tide
11:06PM0.63m
10:54AM0.71m
11:15PM0.67m
11:39AM0.61m
11:33PM0.73m
12:35PM0.51m
11:57PM0.78m
00:29AM0.82m
1:15AM0.84m
2:47AM0.85m
Low Tide
5:13PM0.41m
4:35AM0.46m
5:13PM0.46m
5:41AM0.44m
4:55PM0.49m
7:07AM0.42m
3:46PM0.49m
10:34AM0.40m
1:11PM0.31m
1:59PM0.24m
part cloud
clear
clear
clear
clear
clear
light rain
rain showers
part cloud
cloud
light rain
light rain
rain showers
part cloud
part cloud
rain showers
rain showers
cloud
cloud
cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:41
6:39
6:39
6:37
6:35
6:35
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:59
6:00
6:00
6:00
6:01
6:01
6:02
 mm
3
1
1
2
1
2
6
Temp °C
19
16
18
19
17
17
17
15
14
14
15
16
15
15
16
16
16
11
13
14
Feels °C
17
13
16
18
17
13
11
9
9
9
11
12
11
12
11
9
7
1
5
6
  • 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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