Cobblestones Surf Break

Lat Long: 33.88° S 114.98° E

Cobblestones Surf Forecast and Surf Report

Issued: 7 am 15 Sep 2026 (local time)

Forecast update in  hr  min

Today's Cobblestones sea temperature is
17.8°C
0.8° 

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: Sunday 20 Sep, 11PM (local time) - 11ft (3.5m), 15s period, SW swell with cross-offshore winds.
  • Most powerful swell: Saturday 19 Sep, 5AM (local time) - 13ft (4.0m), 15s period, WSW swell with 6,144 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 0.3m and 7s. Another secondary swell of 0.7m and 8s is also forecast. 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 15s and forecast to arrive on Saturday (Sep 19) at 5AM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.3m 7s period and expected on Friday (Sep 18) at 5AM.

Wave TypeTime (AWST) & Date Wave Height & Period
Next good surf (1 star+) 2AM (Wed 16th Sep)8ft (2.5m) 14s
Best Surf11PM (Sun 20th Sep)11ft (3.5m) 15s
Most Powerful 5AM (Sat 19th Sep)13ft (4.0m) 15s

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 solid run of swell on the cards for Cobblestones, but it’s not going to be one of those weeks where you can just rock up anytime. The ocean is going to be throwing some serious weight around, so we need to pick our moments.

The opening act sees a solid pulse of long-period SW groundswell rolling in. Tuesday morning kicks things off with a clean 9.8ft of swell, a 14-second period, and light offshore ENE breeze. That’s a proper combo for the reef, and the water temp is sitting at 64°, which is about average for this time of year. This right here is your standout of the first few days. It’s an expert-only wave at this size, and the energy is strong (4009), so only the confident crew need apply. The afternoon still has plenty of size, but the wind goes light cross-shore, so it will get a little textured.

Wednesday has some good waves too. The morning is big and clean with a 6.9ft swell, but a moderate NE cross-off breeze. Afternoon drops to a more manageable 5.2ft, with a light NNE cross-off and clean conditions. That's a fun size for a lot of you. Thursday is still worth a paddle, with the morning offering a clean 5.2ft WSW swell and a moderate N cross-off, but the wind picks up through the day and the afternoon gets messy.

Now, here's where it turns. From Friday through Saturday, the wind swings onshore and howls. The swell is still big and strong, with periods stretching out, but it’s going to be lumpy, choppy, and pretty much a washout. This is more of a kite-surfing spectacle than a surfing one unless you’re desperate for a beating.

Then comes the gem. Sunday morning, we get a reprieve. The wind drops to a glassy 3 mph from the SW, and we have a strong 7.5ft WSW swell (1471). The surface will be like a lake. It’s not the biggest of the week, but the conditions will be pure. This is your second standout – a proper, clean, glassy session on an experienced wave.

After that, it’s a mixed bag into next week. Monday has size, but the wind is cross-onshore and it's a bit rough. Tuesday sees the swell back off a touch, but onshore winds keep it junky. Wednesday brings more onshore breeze and lumpy conditions.

Now, let’s talk about the big one. The end of the month into the 24th and 25th, the swell is forecast to go absolutely mental. We're looking at 19.7ft to 21.3ft swells with 18-second periods, and the combined energy readings are off the charts (23292 and then 26267 on Friday morning). The wind and tide might be favorable, but this is way, way too big for this reef. This is not a surf session; it's a survival test. Steer clear unless you're charging mutant slabs with a jet ski on standby.

That giant pulse eases off a bit for the 26th and 27th, leaving us with a solid 11.5ft on a 16-second period. The standout there is the 28th, especially Monday afternoon. You’ve got a clean 11.5ft SW groundswell, with a light NNW cross-off breeze and a long 16-second period. This has the makings of something special, but it's a long way out, so we treat it as promising, not guaranteed. After that, the swell fades quickly into the 29th and 30th, with onshore winds and a drop in size that brings the run to an end.

So, the best bets are clear: Tuesday morning for the big, clean start, and Sunday morning for the glassy, fun-size session. The 28th afternoon is the long-range dream, but we'll see.

There will be a few days in there with no good surf, so check the buoys and wind before you make the drive. Stay safe out there.

Short Range Forecast

Mostly dry. Warm (max 24°C on Wed afternoon, min 12°C on Tue morning). Winds increasing (light winds from the NNE on Wed afternoon, fresh winds from the N by Thu night).

Days 4-6 Weather Summary

Moderate rain (total 11mm), heaviest on Fri morning. Very mild (max 17°C on Fri morning, min 12°C on Fri night). Winds decreasing (near gales from the N on Fri afternoon, calm by Sun morning).

Tuesday
15
Wednesday
16
Thursday
17
Friday
18
Saturday
19
Sunday
20
Monday
21
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
4
4
3
4
4
3
1
2
3
0
0
0
0
0
4
4
6
3
2
2
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
14
3
SW
14
2.5
SW
14
2.1
SW
13
1.6
SW
13
1.6
WSW
14
1.6
WSW
14
1.5
WSW
13
1.6
WSW
12
3
WSW
17
2.5
WSW
16
3.5
WSW
15
3.5
WSW
14
3
WSW
14
2.5
WSW
13
2.3
WSW
12
3
SW
15
3.5
SW
15
3
SW
15
3
SW
14
2.5
SW
14
Wave Graph
Metric surfscale
Energy kJ
4009
3619
2390
1482
865
1072
971
796
715
5183
3197
5513
4704
3644
2240
1471
4024
5446
4284
3710
2873
Wind (km/h)
10
ENE
10
SSE
20
E
20
NE
5
NNE
10
N
25
N
25
NNW
30
N
30
NNW
45
WNW
35
WSW
25
W
25
W
20
W
5
SW
10
WSW
10
E
10
NW
15
W
15
SW
Wind State
off
cross
off
cross-off
cross-off
cross-off
cross-off
cross
cross-off
cross
cross-on
on
cross-on
cross-on
cross-on
glassy
on
cross-off
cross-on
on
on
High Tide
9:41AM0.38m
11:04PM0.76m
11:28PM0.79m
11:55PM0.81m
00:25AM0.81m
1:03AM0.80m
2:38AM0.77m
Low Tide
2:06PM0.35m
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
light rain
rain showers
rain showers
clear
part cloud
light rain
clear
clear
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:20
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
4
2
3
2
Temp °C
17
20
19
21
24
22
20
19
18
17
16
14
16
16
16
16
16
15
16
17
16
Feels °C
15
19
16
18
22
22
17
16
13
12
6
7
10
10
12
16
15
13
15
15
14
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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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