Cobblestones Surf Break

Lat Long: 33.88° S 114.98° E

Cobblestones Surf Forecast and Surf Report

Issued: 1 am 17 Aug 2026 (local time)

Forecast update in  hr  min

Today's Cobblestones sea temperature is
19.2° C
1.8° 

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


Cobblestones surf forecast from 16 Aug 2026:

  • Best quality surf: Saturday 22 Aug, 2AM (local time) - 7.5ft (2.3m), 17s period, SW swell with cross-offshore winds.
  • Most powerful swell: Monday 17 Aug, 11PM (local time) - 16ft (5.0m), 15s period, WSW swell with 11,431 kJ wave energy.
  • Next surfable swell (1★+): Saturday 22 Aug, 2AM (local time) - 7.5ft (2.3m), 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 Saturday (Aug 22) at 2AM. The primary swell is predicted to be 2.3m and 17s period with a secondary swell of 2.5m and 14s. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Cobblestones in the next 16 days are 5.0m 15s and forecast to arrive on Monday (Aug 17) at 11PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 3.0m 7s period and expected on Monday (Aug 17) at 8AM.

Wave TypeTime (AWST) & Date Wave Height & Period
Next good surf (1 star+) 2AM (Sat 22nd Aug)7.5ft (2.3m) 17s
Best Surf 2AM (Sat 22nd Aug)7.5ft (2.3m) 17s
Most Powerful11PM (Mon 17th Aug)16ft (5.0m) 15s

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


The Lowdown

Alright, Rusty here. Let’s have a look at what’s coming down the pipe at Cobblestones.

We’ve got a solid run of swell on the way, but the first few days are going to test your patience. A lot of strong wind and rain in the picture before things clean up proper.

Right out of the gate, Monday the 17th is a write-off. A big WSW swell of 13.1ft to 18.0ft is getting thrashed by 28 mph onshore winds. The combined energy is massive—9988 to 9232—but it’s just a mess. Don’t even think about it.

Tuesday the 18th is still not great. The swell drops a little to 14.8ft, but the wind is still cross-onshore and it’s choppy. The energy is still very high, around 10858 in the morning. This is big, powerful, and ugly.

Wednesday the 19th starts to show some promise. Swell stays at 14.8ft from the WSW with a long 15 to 16-second period, and the wind finally turns onshore but light. The energy is still high—8656 to 10159. The conditions are described as marginal, but at least it’s not blown out. This is for experienced surfers only, as 14.8ft is well into big-wave territory.

Thursday the 20th is where we start to see a real window. The swell is still a solid 13.1ft to 11.5ft from the WSW/SW, period hanging around 15 to 16 seconds. The energy is still strong at 7197. But the wind turns light, with a light cross-onshore breeze in the morning. That’s the first day that’s actually surfable for the crew that can handle the size.

Now, the standout window is from Friday the 21st through the weekend. The swell starts to ease into the 9.8ft to 11.5ft range, but the period stays long. The real magic happens on Saturday the 22nd morning: we get a 9.8ft south-west groundswell (16-second period) with glassy conditions. The wind is dead calm—just a slight air. The energy is still strong at 4414, but it’s clean. That morning is the best of the first week for anyone experienced. The afternoon drops to 8.2ft and still clean-ish.

Sunday the 23rd gets ugly again with 22 to 28 mph winds and a 13.1ft to 16.4ft swell. The energy spikes to 7285 in the afternoon, but it’s a total mess. Skip it.

Monday the 24th stays windy and lumpy with 19 mph cross-shore winds and 13.1ft to 14.8ft swell. Not great.

But then, we get a second, possibly better window. Tuesday the 25th morning brings a 9.8ft SSW swell with a clean offshore wind from the ENE at just 3 mph. That’s a gorgeous combo for a spot that prefers SSW swell. The energy is moderate at 2800, and the conditions are described as excellent for experienced surfers. That’s a serious contender for the pick of the entire forecast. The afternoon gets even smaller at 6.6ft, with a very long 18-second period and glassy conditions. For the right tide, that afternoon glass-off could be magic.

Wednesday the 26th morning keeps the good vibes with another glassy morning—8.2ft, 16-second swell, and ENE wind at 3 mph. The energy is 4248. That’s another excellent session for the crew who can handle the set waves.

From there, the swell slowly fades into the end of the month. The mornings of Thursday the 27th and Friday the 28th offer clean, smaller surf (6.6ft to 6.9ft) with offshore or cross-off winds. The energy drops to between 1714 and 2990. It’s not pumping, but it’s clean and fun for a log or a fish.

Then we get a pulse towards the end of the first week of September. Saturday the 29th sees a jump to 14.8ft from the WSW with a moderate cross-off wind and clean conditions. The energy is back up to 7762. That one is worth circling for the big-wave hunters.

After that, the forecast slips back into strong onshore winds and blown-out conditions from Sunday the 30th through Monday the 31st, with swells of 11.5ft to 16.4ft and winds up to 31 mph. Messy.

And finally, Tuesday the 1st of September, a huge 18.0ft south-west swell with 16-second period rolls in. The energy is astronomical at 15631. The wind is onshore but moderate at 12 mph. The notes say it’s simply too big for this break. That one is a straight pass.

So for my money, the absolute best on offer is Tuesday the 25th of August, morning session at Cobblestones. Clean, offshore wind, solid 9.8ft SSW groundswell, and moderate energy. After that, Saturday the 22nd morning with glassy conditions and a 9.8ft swell is a close second for clean, big-wave fun.

Ride safe, catch a good one.

Short Range Forecast

Moderate rain (total 16mm), heaviest on Mon morning. Very mild (max 18°C on Mon morning, min 13°C on Mon afternoon). Winds decreasing (strong winds from the W on Mon afternoon, light winds from the WSW by Wed night).

Days 4-6 Weather Summary

Light rain (total 2mm), mostly falling on Thu morning. Very mild (max 16°C on Thu morning, min 11°C on Fri night). Wind will be generally light.

Monday
17
Tuesday
18
Wednesday
19
Thursday
20
Friday
21
Saturday
22
Sunday
23
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
6
0
0
6
6
7
7
5
5
3
4
6
5
4
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)
4
W
15
5.5
WSW
12
5
WSW
15
4.5
WSW
16
4.5
WSW
16
3.5
WSW
15
4.5
WSW
15
4.5
WSW
16
4.5
WSW
16
4
WSW
16
3.5
SW
15
3.5
SW
15
3.5
SW
14
3.5
SW
14
2.3
SW
17
3
SW
16
2.5
SW
15
2
SW
14
4
WSW
10
5
WSW
12
5
WSW
13
Wave Graph
Metric surfscale
Energy kJ
8222
9232
11177
10045
8941
6098
8656
10159
9799
7197
6520
5995
4654
4654
3052
4414
3075
1581
3250
7285
7437
Wind (km/h)
45
W
45
WSW
20
WSW
20
WNW
20
WNW
30
WNW
15
WSW
15
SW
10
WSW
10
NW
15
SW
5
SW
10
WSW
10
SW
10
SE
5
WNW
10
WSW
20
W
35
WSW
45
SSW
40
S
Wind State
on
on
on
cross-on
cross-on
cross-on
on
on
on
cross-on
on
on
on
cross-on
cross-off
glassy
on
cross-on
on
cross-on
cross-on
High Tide
10:00AM0.54m
00:10AM0.70m
00:37AM0.74m
1:15AM0.78m
2:08AM0.81m
3:39AM0.84m
5:28AM0.87m
Low Tide
4:12PM0.44m
3:35PM0.38m
3:25PM0.34m
3:31PM0.30m
3:41PM0.29m
3:54PM0.28m
4:05PM0.29m
mod rain
light rain
cloud
cloud
light rain
rain showers
part cloud
part cloud
part cloud
rain showers
rain showers
part cloud
part cloud
clear
clear
part cloud
cloud
part cloud
rain showers
rain showers
rain showers
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:56
6:56
6:54
6:54
6:52
6:52
6:50
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:51
5:52
5:52
5:52
5:53
5:53
5:54
 mm
9
3
1
3
1
1
3
1
4
Temp °C
18
13
14
14
15
16
16
15
15
16
16
16
15
15
14
14
15
16
15
14
13
Feels °C
10
3
5
10
11
8
11
11
11
14
14
14
14
13
12
13
13
14
8
5
4
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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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