Cobblestones Surf Break

Lat Long: 33.88° S 114.98° E

Cobblestones Surf Forecast and Surf Report

Issued: 1 pm 15 Aug 2026 (local time)

Forecast update in  hr  min

Today's Cobblestones sea temperature is
18.8° 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 15 Aug 2026:

  • Best quality surf: Monday 17 Aug, 5PM (local time) - 16ft (5.0m), 17s period, WSW swell with onshore winds.
  • Most powerful swell: Monday 17 Aug, 5PM (local time) - 16ft (5.0m), 17s period, WSW swell with 15,260 kJ wave energy.
  • Next surfable swell (1★+): Saturday 15 Aug, 8PM (local time) - 8ft (2.5m), 13s period with WSW 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 Saturday (Aug 15) at 8PM. The primary swell is predicted to be 2.5m and 13s period. The wind is predicted to be offshore as the swell arrives.

The most powerful waves expected at Cobblestones in the next 16 days are 5.0m 17s and forecast to arrive on Monday (Aug 17) at 5PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.4m 6s period and expected on Monday (Aug 17) at 8AM.

Wave TypeTime (AWST) & Date Wave Height & Period
Next good surf (1 star+) 8PM (Sat 15th Aug)8ft (2.5m) 13s
Best Surf 5PM (Mon 17th Aug)16ft (5.0m) 17s
Most Powerful 5PM (Mon 17th Aug)16ft (5.0m) 17s

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


The Lowdown

Alright, Rusty here. Let’s have an honest look at what’s headed our way.

Alright, mate. The next two weeks are a bit of a wild ride for Cobblestones. That spot is a real challenge, only for the experienced crew, and it needs a clean window to be worth the paddle. We’ve got a huge pulse coming in first thing, but the wind is going to spoil a lot of it. The real standout is a very glassy session on Friday the 21st of August, and then the whole second week looks pretty average to ugly. There’s a long gap of nothing much worthwhile after Sunday the 23rd.

It all kicks off Saturday the 15th of August. An afternoon session shows a solid 8ft WSW groundswell with a 13-second period—that’s proper energy (2116). The water is 66°, about a degree and a half warmer than usual, so it’s a touch warmer than normal. A 15 km/h NNE wind is keeping it cross-off and clean. Excellent conditions for an experienced surfer. This is the pick of the first few days, no doubt.

Sunday the 16th has a bigger 10ft WSW swell, but there’s a fresh breeze at 30 km/h. The morning and afternoon are both just “questionable” and only worth a 3. It’s a step down.

Monday the 17th is a mess and a washout. Heavy rain, then showers, with a 45 km/h onshore wind. The swell jumps to 15ft then 16ft—that’s way too big for anyone but experts, and with the wind howling onshore, it’s unsurfable. A kiter might have a ball, but not for a surfer.

Tuesday the 18th and Wednesday the 19th stay big with 13ft to 15ft WSW swell, but the wind is cross-onshore. A few of the afternoon slots are “fairly choppy” but might be just about rideable for the brave. Nothing special.

Thursday the 20th is more messy onshore wind and big swell. Skip it.

Now, the absolute standout. Friday the 21st of August. The morning is clean with a cross-off breeze and a 13ft SW groundswell. But it’s the *afternoon* that’s the gem: glassy conditions, a 5 km/h SE breeze, and a 13ft SW groundswell with a 14-second period (6472). This is exceptional for experts. That’s the one to circle on the calendar.

Saturday the 22nd has two excellent windows. A 10ft SW swell in the morning with a light cross-off breeze. The afternoon is glassy again with a lighter 8ft SW swell. Both are clean and good for experienced paddlers.

Sunday the 23rd is okay in the morning, a clean 8ft SW swell with a long 15-second period, but the afternoon gets lumpy cross-shore wind. From here, it’s all downhill.

Monday the 24th through Wednesday the 27th sees dropping swell but increasingly strong and ugly wind. The sessions are all marginal to poor. By Tuesday the 25th, it’s 5ft to 6ft with a near-gale and strong cross-onshore wind. Then Wednesday the 26th, a massive 15ft pulse hits with a fresh onshore gale—again, unsurfable, possibly more for kites.

Thursday the 27th to Sunday the 30th is a rough end. The swell stays big, from 10ft to 13ft, with onshore or strong cross-onshore winds. The last session on Sunday the 30th has a massive 13ft, 18-second groundswell (15896!), but a 15 km/h onshore wind makes it just too big for the spot. A real shame.

So, the bottom line: the first couple of days have their moments, with Friday the 21st’s glassy afternoon being the epic window. After Sunday the 23rd, the run looks pretty grim for a solid week. For the area, a blank run like this isn’t unusual when the wind turns sour.

Rusty.

Short Range Forecast

Moderate rain (total 18mm), heaviest on Mon morning. Very mild (max 19°C on Sun afternoon, min 13°C on Mon night). Winds increasing (light winds from the NE on Sat night, strong winds from the W by Mon afternoon).

Days 5-7 Weather Summary

Light rain (total 8mm), mostly falling on Wed morning. Very mild (max 16°C on Tue night, min 10°C on Thu night). Mainly fresh winds.

Sat
15
Sunday
16
Monday
17
Tuesday
18
Wednesday
19
Thursday
20
Friday
21
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
4
4
3
3
2
0
!
0
6
0
0
0
6
6
0
0
6
6
7
6
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
WSW
13
2.1
WSW
13
3
WSW
15
3
WSW
14
3
WSW
15
4.5
W
17
5
WSW
17
4.5
WSW
15
4.5
WSW
16
4
WSW
16
3.5
WSW
15
4
WSW
15
4.5
WSW
15
4.5
WSW
16
4
WSW
16
4
WSW
16
4
SW
15
4
SW
15
4
SW
14
3.5
SW
14
Wave Graph
Metric surfscale
Energy kJ
2116
1528
3866
3388
3530
11784
15260
10105
9521
8698
5785
7531
9251
10526
8365
6708
6720
6809
6472
5012
Wind (km/h)
15
N
10
ENE
30
NNE
30
N
30
NNW
45
SW
45
WSW
25
SW
15
WNW
20
NW
35
WNW
25
WSW
15
SW
20
W
25
WSW
25
SW
20
SE
15
E
5
SE
20
ENE
Wind State
cross-off
off
cross-off
cross-off
cross
on
on
cross-on
cross-on
cross-on
cross-on
on
cross-on
on
on
on
cross-off
cross-off
glassy
off
High Tide
00:00AM0.59m
10:48AM0.62m
11:55PM0.64m
10:00AM0.54m
00:10AM0.70m
00:37AM0.74m
1:15AM0.78m
2:08AM0.81m
3:39AM0.84m
Low Tide
6:01PM0.46m
5:05AM0.52m
5:10PM0.47m
6:30AM0.52m
4:12PM0.44m
3:35PM0.38m
3:25PM0.34m
3:31PM0.30m
3:41PM0.29m
part cloud
clear
clear
clear
rain showers
heavy rain
rain showers
part cloud
cloud
cloud
rain showers
rain showers
part cloud
rain showers
cloud
cloud
rain showers
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:58
6:56
6:56
6:54
6:54
6:52
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:49
5:50
5:51
5:52
5:52
5:52
5:53
 mm
2
13
3
3
3
1
1
Temp °C
18
17
17
19
18
18
14
14
14
15
16
16
15
15
15
15
15
12
16
14
Feels °C
14
16
11
14
13
11
5
6
10
10
9
11
11
11
9
10
10
8
13
10
  • Map Icons:
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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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