Cobblestones Surf Break

Lat Long: 33.88° S 114.98° E

Cobblestones Surf Forecast and Surf Report

Issued: 7 am 16 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 16 Sep 2026:

  • Best quality surf: Saturday 19 Sep, 8AM (local time) - 21ft (6.5m), 14s period, W swell with cross-onshore winds.
  • Most powerful swell: Saturday 19 Sep, 8AM (local time) - 21ft (6.5m), 14s period, W swell with 15,747 kJ wave energy.
  • Next surfable swell (1★+): Wednesday 16 Sep, 5PM (local time) - 5ft (1.6m), 13s 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 5PM. The primary swell is predicted to be 1.6m and 13s period with a secondary swell of 0.9m and 16s. 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 6.5m 14s and forecast to arrive on Saturday (Sep 19) 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 4.5m 9s period and expected on Friday (Sep 18) at 8PM.

Wave TypeTime (AWST) & Date Wave Height & Period
Next good surf (1 star+) 5PM (Wed 16th Sep)5ft (1.6m) 13s
Best Surf 8AM (Sat 19th Sep)21ft (6.5m) 14s
Most Powerful 8AM (Sat 19th Sep)21ft (6.5m) 14s

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


The Lowdown

G’day folks, Rusty here. Let’s have a look at what’s on the cards for the next couple of weeks. We’ve got a lot of ocean energy coming, but it ain’t all gonna be pretty. There’s a big gap, and then we score some gems, so listen up.

Right off the bat, from the 16th through the 18th, we’ve got waves in the 5ft to 7ft range at Cobblestones, coming from the SW with a solid 13 to 17-second period. The energy is moderate, with the combined energy sitting between 989 and 2820. Early on, a cross-offshore breeze is keeping things clean, but by Friday afternoon the wind swings and messes it up. We’re looking at a bit of a hit-and-miss run here, with the swell dropping and the wind not being our friend.

Then the ocean just turns it on for a few days. The 19th and 20th see a massive spike in size, but it's unsurfable for us. On Saturday the 19th, we’ve got a serious 20ft of SW swell, but it's getting smashed by strong cross-onshore winds, so it’s a total write-off. The energy is very strong, reading 12049, but it's just howling. Same story for Sunday the 20th; it's smaller, but still big and lumpy with a heavy cross breeze. This is where we just watch and wait.

Come Monday the 21st of September, things start to settle into a nice rhythm. The SW swell is still a solid 11ft with a 15-second period, but the wind goes light and glassy in the afternoon. The energy is strong (5476 in the morning and 4462 in the afternoon), and it's looking clean. This is when you want to be in the water. The crowd is always a factor at Cobblestones, so expect some company, but for the experienced crew, this is a standout.

We get a run of onshore winds and rubbish surf from the 22nd through the 25th, with wave heights around 8ft to 15ft but generally choppy and blown-out. It's a bit of a write-off, but the energy is still pumping in, clocking in at over 12,000 on the 25th, but again, it's just too messy.

Now, for the real standout. Mark your calendars for the 30th of September. Wednesday morning has a 13ft SW swell with a 16-second period, and while the wind is a light cross-on, the energy is a huge 8364. But the real gem is the morning of Thursday, the 1st of October. The swell is a clean 10ft from the SW, a 16-second period, and the combined energy is a very strong 4586. The wind is glassy and light from the NNE. This looks absolutely perfect for Cobblestones. It might be a Tuesday or a Wednesday, but if you can sneak out, this is the pick of the entire forecast. As a reef break, this long-period SW groundswell (15-16s) will wrap in nicely, giving some great shaped walls. It's going to be bigger, and for beginners, anything over 8ft is a no-go, and this is definitely over that, so this is strictly for the experienced surfer.

Outside of that standout, the last few days on the 29th and 30th are a mix of onshore winds and big surf, so I’d pick your sessions carefully. The water is about 64°F, which is around average for this time of year.

So there you have it. A rough start, a messy hump, but a very, very promising first of the month. Get your good board ready and be ready to pounce.

Catch you in the water.

Rusty.

Short Range Forecast

Light rain (total 9mm), mostly falling on Fri afternoon. Warm (max 24°C on Wed afternoon, min 13°C on Fri night). Winds increasing (light winds from the N on Wed afternoon, near gales from the W by Fri night).

Days 4-6 Weather Summary

Light rain (total 4mm), mostly falling on Sat morning. Very mild (max 17°C on Mon afternoon, min 12°C on Sun night). Winds decreasing (near gales from the W on Sat morning, calm by Mon afternoon).

Wednesday
16
Thursday
17
Friday
18
Saturday
19
Sunday
20
Monday
21
Tuesday
22
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
3
4
3
3
1
3
1
0
0
0
0
0
3
4
7
5
5
3
0
1
4
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
2.1
SW
13
1.6
SW
13
1.6
WSW
14
1.7
WSW
14
1.5
WSW
13
1.5
WSW
12
1.6
SW
17
1.9
WSW
16
5.5
WNW
11
6
WSW
13
4.5
WSW
13
3.5
WSW
13
2.5
WSW
12
3.5
SW
16
4
SW
15
3.5
SW
15
3
SW
15
2.5
SW
14
2.5
SW
14
2.5
SW
14
3
SW
13
Wave Graph
Metric surfscale
Energy kJ
1584
865
1072
1079
796
636
1467
1975
6514
12049
6395
3488
2024
5048
6979
5476
4462
3009
2506
2756
2880
Wind (km/h)
20
NNE
10
N
20
NE
20
N
25
NNW
15
N
40
NNE
45
NNW
55
NW
45
W
30
W
20
SW
10
S
15
S
10
NE
10
NNW
5
SW
10
NW
25
SW
20
SW
10
SE
Wind State
cross-off
cross-off
cross-off
cross-off
cross
cross-off
cross-off
cross
cross-on
cross-on
on
on
cross
cross
off
cross
glassy
cross-on
on
cross-on
cross-off
High Tide
11:28PM0.79m
11:55PM0.81m
00:25AM0.81m
1:03AM0.80m
2:38AM0.77m
6:05AM0.76m
Low Tide
2:02PM0.31m
2:13PM0.28m
2:26PM0.27m
2:39PM0.27m
2:51PM0.28m
3:03PM0.28m
3:14PM0.30m
clear
clear
rain showers
clear
clear
clear
clear
rain showers
rain showers
light rain
part cloud
rain showers
part cloud
clear
clear
part cloud
part cloud
rain showers
rain showers
part cloud
part 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
6:09
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:10
6:12
6:13
6:13
6:14
6:15
6:15
 mm
1
2
6
2
1
1
1
Temp °C
21
24
21
20
19
17
20
20
16
16
16
16
16
16
14
16
17
17
16
16
15
Feels °C
19
24
20
18
17
15
14
14
7
7
9
11
14
13
11
15
16
15
12
11
12
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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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