Cobblestones Surf Break

Lat Long: 33.88° S 114.98° E

Cobblestones Surf Forecast and Surf Report

Issued: 1 pm 11 Aug 2026 (local time)

Forecast update in  hr  min

Today's Cobblestones sea temperature is
19.6° C
2.2° 

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


Cobblestones surf forecast from 11 Aug 2026:

  • Best quality surf: Thursday 13 Aug, 11PM (local time) - 13ft (4.0m), 16s period, SW swell with cross-offshore winds.
  • Most powerful swell: Tuesday 11 Aug, 8PM (local time) - 16ft (5.0m), 16s period, SW swell with 12,032 kJ wave energy.
  • Next surfable swell (1★+): Wednesday 12 Aug, 11PM (local time) - 13ft (4.0m), 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 (Aug 12) at 11PM. The primary swell is predicted to be 4.0m and 15s period. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Cobblestones in the next 16 days are 5.0m 16s and forecast to arrive on Tuesday (Aug 11) at 8PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 4s period and expected on Sunday (Aug 16) at 5PM.

Wave TypeTime (AWST) & Date Wave Height & Period
Next good surf (1 star+)11PM (Wed 12th Aug)13ft (4.0m) 15s
Best Surf11PM (Thu 13th Aug)13ft (4.0m) 16s
Most Powerful 8PM (Tue 11th Aug)16ft (5.0m) 16s

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


The Lowdown

Alright folks, Rusty here. Let’s get into it.

We’ve got a big, powerful run of swell headed our way, but it’s going to take a few days to clean up. The standout is definitely Cobblestones, a heavy reef break for experts only. The first few days are a write-off with strong onshore winds, but once the wind swings around, it’s gonna get real interesting.

The water is sitting at 67° right now, which is 4° warmer than usual for this time of year – that’s a notable bump, you’ll feel it.

Tuesday the 11th is a no-go. We’ve got a massive 18ft SW swell with a 16-second period, but the wind is a messy cross-on at 15 mph. The combined energy is a massive 14004 (very strong wave energy). It’s just poor surf conditions. Don’t bother.

Wednesday the 12th is still a bit of a question mark. Swell drops to 13ft from the SW, period still a solid 15 seconds, but the wind is onshore. The energy is still strong (7399 to 7055), but the tide and conditions are marginal. The scores are okay, but it’s not a go yet.

Thursday the 13th is where it starts to get interesting. The morning shows a 13ft SW swell with a 16-second period and a light NNW cross-shore breeze at 3 mph. The energy is still very strong at 8696. The afternoon is even better with a 17-second period (very long period groundswell) and a 6 mph onshore wind, but the score is higher in the morning. This is a big swell, over 8ft, so it’s for experts only. Long period plus a reef break like Cobblestones means it’ll hold up well and not just close out.

Friday the 14th is the absolute pick of the window. Morning session is exceptional for experts. We’ve got 12ft of SW swell, 16-second period, and a light NNE cross-offshore breeze at 6 mph. Clean conditions. The energy is moderate at 6461. The afternoon is even better – glassy, with a WNW wind at 3 mph and 12ft SW swell. That’s as good as it gets. This is the day to call in sick.

Saturday the 15th drops a bit in size to 8ft, but it’s still excellent for experienced surfers. The wind is clean cross-offshore from the N at 9 mph. The energy is moderate (2609 to 2231). Still a solid day.

Sunday the 16th is a bit of a mixed bag. The swell is back up to 12ft from the WSW, but the wind is a stronger cross-offshore at 12 mph. The conditions are clean, but the scores are lower. It’s marginal.

Then we hit a rough patch. Monday the 17th through Wednesday the 19th is pretty terrible. Onshore winds and rain showers, with the swell staying big (12ft to 15ft). The energy is still very high (9518 to 10290), but it’s just poor surf. The setup looks more interesting for kite surfing than paddle surfing during this period.

Thursday the 20th and Friday the 21st are a no-go again with onshore winds and lumpy conditions.

There’s a flicker of hope on Saturday the 22nd. The morning is marginal with an 12ft SW swell, 17-second period, and a light onshore wind at 3 mph. The energy is moderate at 7759. The score is decent, but the wind is a bit cross-on.

The final week (23rd to 26th) is mostly poor with strong onshore winds and rain, though the swell stays in the 8ft to 13ft range. The 25th of August has a clean morning with a 13ft SW swell and light onshore wind, but the scores are just marginal.

So, bottom line: Friday the 14th is the absolute standout – glassy, clean, and a solid 12ft SW groundswell. If you’re an expert, that’s your day. Thursday the 13th is a close second, but the wind is a little more side-on. After that, it’s a waiting game.

Stay safe out there.
Rusty

Short Range Forecast

Mostly dry. Very mild (max 14°C on Tue afternoon, min 11°C on Thu morning). Wind will be generally light.

Days 5-7 Weather Summary

Light rain (total 2mm), mostly falling on Mon morning. Very mild (max 18°C on Sat afternoon, min 14°C on Fri night). Winds increasing (calm on Fri afternoon, fresh winds from the WNW by Sun night).

Tue
11
Wednesday
12
Thursday
13
Friday
14
Saturday
15
Sunday
16
Monday
17
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
6
6
8
8
8
8
7
6
5
4
4
4
4
4
6
0
0
7
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
16
4.5
SW
15
4
SW
15
4
SW
15
4
SW
15
4
SW
16
4
SW
17
4
SW
16
3.5
SW
16
3.5
SW
15
3
SW
14
2.5
SW
14
2.5
WSW
13
2.2
WSW
13
3.5
WSW
15
3
WSW
14
3
WSW
15
4
WSW
18
4
WSW
17
4
WSW
16
Wave Graph
Metric surfscale
Energy kJ
14004
9483
7377
6892
7222
8696
10091
7675
6461
5050
3810
2609
2231
1657
4702
3985
4301
9518
8778
7297
Wind (km/h)
25
SW
20
SW
15
WSW
15
SW
0
E
5
NNW
10
SW
10
ESE
10
NNE
5
WNW
5
NE
15
N
15
N
10
NE
20
NNE
15
N
15
NNW
30
SW
25
SW
10
W
Wind State
cross-on
cross-on
on
on
glassy
cross
on
cross-off
cross-off
glassy
off
cross-off
cross-off
off
cross-off
cross-off
cross-off
on
cross-on
cross-on
High Tide
9:17AM0.98m
9:55AM0.92m
10:26AM0.82m
00:30AM0.56m
10:47AM0.72m
00:00AM0.59m
10:48AM0.62m
11:55PM0.64m
10:00AM0.54m
00:10AM0.70m
Low Tide
5:34PM0.24m
6:03PM0.29m
6:23PM0.35m
6:25PM0.42m
3:53AM0.53m
6:01PM0.46m
5:05AM0.52m
5:10PM0.47m
6:30AM0.52m
4:12PM0.44m
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
rain showers
cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:03
7:01
7:01
6:58
6:58
6:56
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:46
5:46
5:47
5:49
5:49
5:50
5:51
 mm
2
Temp °C
14
14
14
14
14
13
14
14
14
15
15
17
18
17
17
18
18
17
15
15
Feels °C
8
9
11
11
12
12
12
12
12
13
13
15
15
16
13
14
12
11
10
11
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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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