Cobblestones Surf Break

Lat Long: 33.88° S 114.98° E

Cobblestones Surf Forecast and Surf Report

Issued: 7 am 21 Aug 2026 (local time)

Forecast update in  hr  min

Today's Cobblestones sea temperature is
18.9° C
1.5° 

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


Cobblestones surf forecast from 21 Aug 2026:

  • Best quality surf: Wednesday 26 Aug, 11AM (local time) - 16ft (5.0m), 18s period, WSW swell with onshore winds.
  • Most powerful swell: Wednesday 26 Aug, 2PM (local time) - 18ft (5.5m), 18s period, WSW swell with 16,933 kJ wave energy.
  • Next surfable swell (1★+): Friday 21 Aug, 11PM (local time) - 10ft (3.0m), 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 Friday (Aug 21) at 11PM. The primary swell is predicted to be 3.0m and 14s period with a secondary swell of 1.8m and 18s. 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 5.5m 18s and forecast to arrive on Wednesday (Aug 26) at 2PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.8m 6s period and expected on Tuesday (Aug 25) at 5PM.

Wave TypeTime (AWST) & Date Wave Height & Period
Next good surf (1 star+)11PM (Fri 21st Aug)10ft (3.0m) 14s
Best Surf11AM (Wed 26th Aug)16ft (5.0m) 18s
Most Powerful 2PM (Wed 26th Aug)18ft (5.5m) 18s

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


The Lowdown

G'day, I'm Rusty, and let's get into it for Cobblestones. This is a consistent, advanced reef break that's exposed to the swell, and it's been working on a juicy SSW groundswell. The water temp is sitting at 66°, which is a touch warmer than normal for this time of year, so you might be able to get away with a slightly thinner suit.

The first real standout is Friday morning, the 21st of August. We've got a solid 12 ft SW groundswell rolling in with a 14-second period, packing a massive 5427 (strong) energy. The wind is glassy from the north at just 3 mph, and the conditions are clean. This is going to be exceptional surf for expert surfers only, as that size is well over the 8 ft mark. It's a heavy, powerful reef setup, so if you're not absolutely on your game, give it a miss.

The rest of the weekend and into the next week looks pretty average. The wind swings onshore or cross-onshore, bringing chop and poor conditions. The swell stays solid, between 8 ft and 10 ft, but the quality just isn't there for a good session.

Now, keep your eye on Wednesday the 26th of August. The forecast is calling for a massive 16 ft WSW swell with a 18-second period, and the energy reading is a massive 16803 (very strong). The morning wind is clean onshore from the WSW at 12 mph. The guidance says the wind and tide are favorable, but honestly, at 16 ft this is going to be absolutely monstrous and only for the most experienced, and it might even be too big for the break itself. It's a serious, long-range call with a lot of power.

After that, there's a bit of a lull in quality until the 28th of August. The Friday morning of the 28th sees a cleaner 8 ft SW swell with a 12-second period, and light ESE cross-off winds at 6 mph, making for clean conditions. The energy is 2172 (strong), and it's a good option for experienced surfers, though it's a bit smaller than the earlier bomb.

Looking further ahead, the 30th of August Sunday morning has a 10 ft SW swell with a long 18-second period, and clean cross-off winds from the north at 22 mph. The energy is 5551 (strong). It's a solid, clean option, but the wind is strong, so it might be a bit lumpy at the takeoff.

The 5th of September Saturday morning shows a 12 ft SW swell with a 13-second period, and clean conditions with SE cross-off winds at 9 mph. The energy is 4987 (strong). It's another promising call, but it's out in the second week, so treat it as a promising possibility rather than a sure thing.

For the most part, the wind is the enemy here, but if you're an expert, keep the 21st and the 26th of August on your radar. The water's a touch warmer than usual, and the swell is consistent. Stay safe out there.

Rusty

Short Range Forecast

Some drizzle, heaviest during Sun morning. Very mild (max 15°C on Fri morning, min 12°C on Fri night). Wind will be generally light.

Days 4-6 Weather Summary

Moderate rain (total 12mm), heaviest on Tue night. Very mild (max 17°C on Tue night, min 11°C on Mon morning). Winds increasing (light winds from the NE on Mon morning, strong winds from the WNW by Tue night).

Friday
21
Saturday
22
Sunday
23
Monday
24
Tuesday
25
Wednesday
26
Thursday
27
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
6
4
6
0
0
1
1
2
6
4
0
0
2
0
0
!
!
7
6
0
4
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
3.5
SW
14
3.5
SW
14
3
SW
14
3
SW
16
2.5
SW
16
2.2
SW
14
2.5
SW
13
2.5
SW
13
3.5
SW
14
3
SW
14
2.5
SW
13
2.5
WSW
13
3
SW
14
3
WSW
13
4
WSW
15
5
WSW
18
5
WSW
17
4.5
WSW
16
4
SW
15
3.5
SW
14
3
SW
13
Wave Graph
Metric surfscale
Energy kJ
5285
4654
3056
4301
3283
1891
2318
2381
5116
3091
2490
2257
3430
3584
6312
16803
15203
9641
6856
4976
3123
Wind (km/h)
5
N
15
SSW
15
SE
25
SSW
25
SSW
15
S
20
SSW
20
SSW
5
SSE
15
NNW
20
NW
25
WNW
30
NNW
35
NNW
30
W
20
WSW
30
SW
20
SSE
15
S
25
S
15
SSE
Wind State
glassy
cross-on
cross-off
cross-on
cross-on
cross-on
cross-on
cross-on
glassy
cross
cross-on
cross-on
cross
cross
cross-on
on
cross-on
cross
cross
cross-on
cross
High Tide
3:39AM0.84m
5:28AM0.87m
6:35AM0.90m
7:24AM0.91m
8:07AM0.91m
8:49AM0.90m
11:28PM0.59m
Low Tide
3:41PM0.29m
3:54PM0.28m
4:05PM0.29m
4:17PM0.29m
4:29PM0.31m
4:41PM0.32m
4:53PM0.34m
2:29AM0.56m
part cloud
clear
clear
part cloud
cloud
part cloud
light rain
clear
part cloud
clear
clear
part cloud
part cloud
cloud
mod rain
cloud
cloud
rain showers
part cloud
clear
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:52
6:52
6:50
6:48
6:48
6:47
6:45
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:53
5:53
5:54
5:55
5:55
5:57
5:58
 mm
1
10
2
Temp °C
15
15
14
15
15
14
14
14
13
14
15
16
16
16
17
15
15
13
15
15
14
Feels °C
14
13
11
11
10
10
9
9
10
10
10
10
10
10
11
10
11
7
12
9
10
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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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