Cobblestones Surf Break

Lat Long: 33.88° S 114.98° E

Cobblestones Surf Forecast and Surf Report

Issued: 7 pm 15 Sep 2026 (local time)

Forecast update in  hr  min

Today's Cobblestones sea temperature is
17.8°C
0.7° 

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


Cobblestones surf forecast from 15 Sep 2026:

  • Best quality surf: Monday 21 Sep, 2AM (local time) - 11ft (3.5m), 15s period, SW swell with cross-offshore winds.
  • Most powerful swell: Friday 18 Sep, 8PM (local time) - 13ft (4.0m), 16s period, WSW swell with 8,654 kJ wave energy.
  • Next surfable swell (1★+): Wednesday 16 Sep, 2AM (local time) - 8ft (2.5m), 14s 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 16) at 2AM. The primary swell is predicted to be 2.5m and 14s period with a secondary swell of 0.9m and 7s. 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 16s and forecast to arrive on Friday (Sep 18) 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 5.0m 10s period and expected on Friday (Sep 18) at 2PM.

Wave TypeTime (AWST) & Date Wave Height & Period
Next good surf (1 star+) 2AM (Wed 16th Sep)8ft (2.5m) 14s
Best Surf 2AM (Mon 21st Sep)11ft (3.5m) 15s
Most Powerful 8PM (Fri 18th Sep)13ft (4.0m) 16s

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


The Lowdown

Alright folks, Rusty here. Let’s have a look at what’s coming our way.

We’ve got a solid run of swell on the cards for Cobblestones (advanced reef), but the wind and size are going to sort the men from the boys. The first proper window of opportunity looks like Wednesday the 16th of September. The morning serves up a clean 6.6 ft SW swell with a 13-second period—moderate combined wave energy (1757)—and a light cross-off breeze from the NNE. It’s only a 3 out of 10, but the water is about average for the time of year. The afternoon cleans up even more with a light N breeze and 5.2 ft SW swell, still 13 seconds, and a better 4 out of 10. That’s your first real go.

Thursday the 17th sours quickly as the wind swings NNW and picks up, putting a cross-chop on 4.9-5.2 ft WSW swell. Not worth waxing up for. Friday the 18th is a write-off; the wind howls from the NW at 34 mph in the afternoon, blowing out a 16.4 ft WNW swell. That much energy (6273) with that wind is for kite surfers, not paddle surfers.

The weekend and into early next week is a no-go. Saturday the 19th and Sunday the 20th are ruled by cross-onshore winds and lumpy, choppy conditions on 7.5-13.1 ft WSW swell. Too messy. Monday the 21st has a clean 11.5 ft SW swell in the morning with a light WSW offshore, but it’s still marginal due to tide and the 13.1 ft afternoon gets chopped up.

The standout window is Wednesday morning the 23rd of September. This is your best bet. Glassy conditions, light NW wind at 3 mph, and a clean 8.2 ft SW swell with a solid 13-second period. The combined energy is strong (2377). At 8.2 ft, this is for advanced surfers only. It’ll be a proper session with no bump on the face.

After that, conditions get messy again until Monday the 28th of September morning, which has a clean but smaller 6.2 ft SW swell with light SW winds. For a 3 out of 10, it’s an option, but nothing special.

Then we get a second notable spike: Tuesday morning the 29th of September. It’s big at 13.1 ft SW with an 18-second period—very long period groundswell (9765 combined energy) and light SW winds. That’s a heavy, powerful reef setup. Only for experts. Crowds are possible here, so be ready for company on those sets.

We also get a clean window on Wednesday the 30th of September morning with a 9.8 ft SW swell—16 seconds, moderate energy (5365)—and a cross-off SSE breeze. Another one for the experienced crew.

So to wrap it up: the first week is a mixed bag with two clean slots—Wednesday the 16th afternoon and Wednesday the 23rd morning being the standouts. The second week has a big, powerful swell on the 29th and 30th. If you can handle the size and the reef, those are your sessions. There are gaps of a few days with poor conditions in between, so pick your day.

Stay safe out there.

Short Range Forecast

Mostly dry. Warm (max 24°C on Wed afternoon, min 15°C on Fri afternoon). Winds increasing (light winds from the N on Wed afternoon, near gales from the N by Fri afternoon).

Days 5-7 Weather Summary

Light rain (total 7mm), mostly falling on Fri night. Very mild (max 17°C on Sat night, min 13°C on Sun night). Winds decreasing (strong winds from the W on Fri night, calm by Mon morning).

Wednesday
16
Thursday
17
Friday
18
Saturday
19
Sunday
20
Monday
21
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
4
3
4
3
2
1
2
1
0
0
0
0
0
2
2
6
3
2
4
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
2.5
SW
14
2
SW
13
1.6
SW
13
1.6
WSW
14
1.6
WSW
14
1.5
WSW
13
1.5
WSW
12
1.5
WSW
17
5
WNW
11
4
WSW
16
4
WSW
14
3
WSW
14
2.5
WSW
13
2.3
WSW
12
2.4
SW
12
3.5
SW
15
3.5
SW
14
3
SW
15
2.5
SW
15
Wave Graph
Metric surfscale
Energy kJ
2526
1380
865
1072
971
808
636
1367
6273
8051
5741
3732
2472
1496
1655
5210
4436
4021
3093
Wind (km/h)
20
E
20
NNE
10
N
20
NNE
20
NNW
25
NNW
25
N
40
N
55
NW
40
W
30
W
25
W
20
WSW
15
SSW
15
SSW
10
ESE
10
WSW
15
SSW
15
SSE
Wind State
off
cross-off
cross-off
cross-off
cross
cross
cross-off
cross-off
cross-on
on
cross-on
cross-on
on
cross-on
cross-on
cross-off
on
cross-on
cross
High Tide
11:04PM0.76m
11:28PM0.79m
11:55PM0.81m
00:25AM0.81m
1:03AM0.80m
2:38AM0.77m
Low Tide
2:02PM0.31m
2:13PM0.28m
2:26PM0.27m
2:39PM0.27m
2:51PM0.28m
3:03PM0.28m
clear
clear
clear
clear
clear
clear
clear
part cloud
part cloud
rain showers
light rain
light rain
rain showers
part cloud
part cloud
clear
clear
part cloud
cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:18
6:16
6:16
6:15
6:13
6:11
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:10
6:10
6:12
6:13
6:13
6:14
6:15
 mm
2
1
2
2
Temp °C
19
21
24
22
20
19
17
19
17
15
16
16
17
16
16
15
15
16
15
Feels °C
16
18
23
22
18
16
15
14
6
7
10
10
12
14
13
12
13
13
12
  • 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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