Cobblestones Surf Break

Lat Long: 33.88° S 114.98° E

Cobblestones Surf Forecast and Surf Report

Issued: 7 pm 09 Sep 2026 (local time)

Forecast update in  hr  min

Today's Cobblestones sea temperature is
18.0°C
1.0° 

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


Cobblestones surf forecast from 9 Sep 2026:

  • Best quality surf: Monday 14 Sep, 2AM (local time) - 13ft (4.0m), 14s period, WSW swell with cross-offshore winds.
  • Most powerful swell: Sunday 13 Sep, 8PM (local time) - 13ft (4.0m), 15s period, WSW swell with 6,144 kJ wave energy.
  • Next surfable swell (1★+): Thursday 10 Sep, 2AM (local time) - 8ft (2.5m), 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 Thursday (Sep 10) at 2AM. The primary swell is predicted to be 2.5m and 15s period with a secondary swell of 0.2m and 26s. 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 Sunday (Sep 13) at 8PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.4m 6s period and expected on Friday (Sep 11) at 2PM.

Wave TypeTime (AWST) & Date Wave Height & Period
Next good surf (1 star+) 2AM (Thu 10th Sep)8ft (2.5m) 15s
Best Surf 2AM (Mon 14th Sep)13ft (4.0m) 14s
Most Powerful 8PM (Sun 13th 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 wild, long-range outlook for Cobblestones, and it's a bit of a rollercoaster. This is a proper advanced reef break that picks up a ton of energy, but the wind is going to be the gatekeeper for most of the next two weeks.

The ride starts off rough. Thursday the 10th and Friday the 11th have a big, long-period swell pushing in from the WSW with wave energy reading (2327 to 4741), but the scores are low. The wind is cross-off, which keeps things clean, but there’s a note of “questionable tide conditions” holding it back. That 10ft swell on Friday afternoon with an 18-second period is a beast, but it’s also borderline for this spot. Saturday the 12th through Sunday the 13th is a write-off for paddling—10ft to 12ft of WSW swell but with strong onshore winds making it choppy and blown out. Combined energy is peaking (5659), but the quality is “poor.” If you’re into kite surfing, that weekend setup might be your jam, but for a surfboard, it’s a hard pass.

Now, here’s where it gets interesting. Monday morning, September 14th, is your standout window. The forecast pulls a 180. A 13ft SW swell at 14 seconds is pumping in, but the magic is the wind: a glassy 3 mph offshore breeze from the NE. That’s the recipe for perfection at this exposed reef. The combined energy is massive (5891), but the quality is “exceptional for expert surfers.” The crowd profile says “sometimes” here, so expect a few heads out, but with that size and power, only the crew will be out. The water temp is about average for the time of year, no real anomaly to speak of.

Monday afternoon sees the wind swing onshore, so the window is small. The session is Monday morning, first light.

The rest of the first week is a mix. Tuesday and Wednesday have moderate swell (8ft to 10ft) but the wind is cross or cross-onshore, making it lumpy. Thursday the 17th has a 7ft swell with a strong N wind, but the size is dropping and the period is shortening. By the 18th and 19th, it’s back to strong onshore winds and blown-out conditions.

The second week looks more intriguing. Sunday, September 20th, has an 12ft SW swell with a light NNW wind making for clean conditions (4270 energy), but the wind is cross-shore, not offshore. It’s surfable for the experienced, but not the standout. Then we hit a rough patch from the 21st to the 23rd with onshore gales and rain. But then, Thursday morning, September 24th, has a promising window: a 6ft SW swell with a light offshore N wind and excellent conditions for experienced surfers. The combined energy is lower (1243) but the quality is there.

Friday the 25th looks promising long-range with an 8ft SW swell and 18-second period, but the wind is onshore, so stay tuned.

In short: The best bet on offer is Monday morning, September 14th – big, clean, and powerful at Cobblestones. Get on it if you’ve got the skill. The secondary call is Thursday morning, September 24th – smaller but clean. The rest is a waiting game for wind.

Stay frothy,
Rusty

Short Range Forecast

Light rain (total 3mm), mostly falling on Fri night. Very mild (max 18°C on Thu afternoon, min 11°C on Thu morning). Winds increasing (light winds from the NNW on Thu afternoon, strong winds from the W by Fri night).

Days 5-7 Weather Summary

Some drizzle, heaviest during Sun night. Warm (max 20°C on Tue afternoon, min 13°C on Sun night). Winds decreasing (fresh winds from the WNW on Sat night, light winds from the WSW by Mon afternoon).

Thursday
10
Friday
11
Saturday
12
Sunday
13
Monday
14
Tuesday
15
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
4
3
3
4
3
4
0
0
0
0
0
0
6
6
3
4
4
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
15
2.1
SW
14
2
WSW
15
2.2
WSW
15
2.1
WSW
16
3
WSW
18
2.5
WSW
16
2.4
WSW
16
3
WSW
15
2.5
WSW
14
3
WSW
16
3.5
WSW
16
4
WSW
14
4
SW
14
4
SW
14
3.5
WSW
14
3
SW
14
3
SW
14
2.5
SW
14
Wave Graph
Metric surfscale
Energy kJ
2699
1785
1737
2070
1997
4724
3721
2682
3855
2791
4164
5659
5089
5891
5713
4887
4010
3234
2450
Wind (km/h)
25
ENE
25
NE
10
NNW
20
ENE
30
NNE
25
N
35
NW
25
W
25
W
30
WNW
30
WNW
20
W
15
SSE
5
NE
15
S
20
E
10
SSE
30
SSE
10
SE
Wind State
off
cross-off
cross
off
cross-off
cross-off
cross
on
cross-on
cross-on
cross-on
on
cross-off
off
cross-on
cross-off
cross
cross
cross-off
High Tide
11:34PM0.54m
9:30AM0.77m
10:58PM0.54m
10:08AM0.69m
10:34PM0.56m
10:39AM0.60m
10:24PM0.61m
11:00AM0.51m
10:28PM0.67m
10:57AM0.43m
10:43PM0.72m
9:41AM0.38m
11:04PM0.76m
Low Tide
2:42AM0.51m
5:02PM0.34m
3:34AM0.45m
4:57PM0.40m
4:22AM0.40m
4:28PM0.44m
5:12AM0.37m
3:38PM0.43m
6:09AM0.37m
2:41PM0.40m
7:39AM0.38m
2:06PM0.35m
clear
clear
clear
part cloud
clear
part cloud
rain showers
clear
part cloud
part cloud
cloud
part cloud
rain showers
part cloud
part cloud
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:26
6:26
6:24
6:22
6:22
6:20
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:06
6:07
6:07
6:07
6:08
6:09
6:10
 mm
3
1
Temp °C
17
15
18
16
16
17
18
16
17
17
17
17
16
16
16
17
18
20
16
Feels °C
13
10
15
12
11
12
14
9
13
11
11
11
13
15
15
14
16
16
14
  • 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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