Cunns Surf Break

Lat Long: 32.10° S 132.98° E

Cunns Surf Forecast and Surf Report

Issued: 2 pm 16 Aug 2026 (local time)

Forecast update in  hr  min

Today's Cunns sea temperature is
15.3° C
0.3° 

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


Cunns surf forecast from 16 Aug 2026:

  • Best quality surf: Thursday 20 Aug, 9PM (local time) - 5ft (1.5m), 16s period, SW swell with cross-offshore winds.
  • Most powerful swell: Friday 21 Aug, 9AM (local time) - 5.5ft (1.7m), 17s period, SW swell with 1,682 kJ wave energy.
  • Next surfable swell (1★+): Sunday 16 Aug, 9PM (local time) - 3.5ft (1.1m), 14s period with SW swell.

Best Forecast Surf Conditions for Cunns this week:

The surf forecast for Cunns over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Sunday (Aug 16) at 9PM. The primary swell is predicted to be 1.1m and 14s period. The wind is predicted to be offshore as the swell arrives.

The most powerful waves expected at Cunns in the next 16 days are 1.7m 17s and forecast to arrive on Friday (Aug 21) at 9AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.8m 4s period and expected on Tuesday (Aug 18) at 9AM.

Wave TypeTime (ACST) & Date Wave Height & Period
Next good surf (1 star+) 9PM (Sun 16th Aug)3.5ft (1.1m) 14s
Best Surf 9PM (Thu 20th Aug)5ft (1.5m) 16s
Most Powerful 9AM (Fri 21st Aug)5.5ft (1.7m) 17s

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


The Lowdown

Alright, let’s just talk about Cunns (reef). It’s the only spot with any action across this 16-day stretch, so we’re keepin’ it simple.

The water’s at 60°, which is about average for the time of year—nothing unusual.

The surf starts Sunday afternoon, August 16th, with a 4ft SW swell, 14-second period, and a light SE breeze blowin’ straight offshore. The wave energy is moderate (650), and it’s clean. Not a bad start.

Monday, August 17th, is even better. The swell drops to 3ft in the morning, but the period stretches to 16 seconds—proper groundswell—and it’s clean with a cross-off wind. The afternoon picks up to 4ft, still SW, with a light offshore breeze makin’ for glassy conditions. Moderate energy (782). This is the best run of the first week.

Then it gets ugly. Tuesday, August 18th, brings a strong NNE wind, lumpy cross-chop, and the scores drop. That rough patch lasts a few days, with onshore winds and questionable conditions through Wednesday and Thursday, August 19th and 20th.

But hold tight. Friday, August 21st, afternoon looks like a standout. The swell jumps to 6ft, still SW, period 16 seconds, and the wind swings cross-off with a light breeze. The combined energy hits 1587—strong, powerful surf. That’s clean, punchy, and for experienced surfers. Saturday, August 22nd, is similar: 5ft SW swell, offshore winds, clean faces, and energy around 1113 to 1310. This is the best run of the forecast.

We get a bit of a lull from Sunday, August 23rd, through to Tuesday, August 26th, with some cross-shore chop and smaller swell. Crowds are possible at times at Cunns, but it’s inconsistent anyway, so you’ll get your share.

Then, on Wednesday, August 26th, afternoon, the swell shifts to WSW, 4ft, period 17 seconds, with a gentle offshore breeze. Clean, and the energy jumps to 1367. Thursday, August 27th, morning sees a 7ft WSW swell, period 16 seconds, but the wind is a fresh cross-off breeze. Still clean, but solid—only for the experienced.

The end of the window has a real barn burner. Saturday, August 29th, morning: glassy conditions, 8ft SW swell, period 18 seconds, and the energy is 4113—very strong. That’s a big, powerful groundswell. For a reef like Cunns, that’s gonna be a proper session. But it’s only for experts. The afternoon stays strong at 8ft, still clean, with energy at 2570.

After that, it drops off again. Sunday and Monday, August 30th and 31st, are smaller, with some cross-shore chop and one clean morning on the 31st with 3ft.

So, the standout days are Friday, August 21st, afternoon through Saturday, August 22nd, and then Saturday, August 29th, morning. The 29th is the biggest, glassiest, and most powerful—but it’s a long-range call, so take it with a pinch of salt. Keep an eye on that one.

Rusty.

Short Range Forecast

Some drizzle, heaviest during Sun afternoon. Warm (max 23°C on Tue afternoon, min 13°C on Mon night). Winds increasing (light winds from the E on Mon afternoon, strong winds from the N by Tue morning).

Days 5-7 Weather Summary

Mostly dry. Very mild (max 16°C on Thu morning, min 13°C on Thu night). Wind will be generally light.

Sun
16
Monday
17
Tuesday
18
Wednesday
19
Thursday
20
Friday
21
Saturday
22
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
3
2
3
3
2
0
0
0
1
2
3
2
1
3
2
4
4
4
4
4
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.3
SW
14
1.1
SW
14
0.8
SW
16
1.1
SW
16
0.8
SW
19
1.1
SW
18
0.9
SW
17
0.9
SW
16
0.9
SW
15
1
SW
15
1.2
SW
15
1
SW
16
1.2
SW
16
1.5
SW
15
1.7
SW
17
1.7
SW
16
1.6
SW
16
1.6
SW
15
1.6
SW
16
1.5
SW
15
Wave Graph
Metric surfscale
Energy kJ
650
428
314
619
520
686
482
448
385
429
623
483
719
1028
1682
1492
1297
1091
1248
924
Wind (km/h)
15
SE
15
E
15
ENE
10
E
20
NNE
30
NNE
30
NNW
20
WSW
10
WNW
15
SW
10
E
5
WNW
20
SSW
10
SSW
15
SW
10
SSW
5
SSE
10
NE
15
SSE
15
ENE
Wind State
off
off
cross-off
off
cross-off
cross
cross-on
cross-on
on
cross
off
on
cross
cross
cross-on
cross-off
glassy
cross-off
cross-off
cross-off
High Tide
1:58AM1.12m
1:49PM1.13m
2:19AM1.13m
1:59PM1.07m
2:40AM1.10m
2:07PM0.99m
3:00AM1.03m
2:07PM0.91m
3:19AM0.92m
1:48PM0.84m
3:31AM0.80m
12:48PM0.83m
2:55AM0.66m
Low Tide
7:51PM0.03m
7:53AM0.16m
8:02PM0.01m
8:12AM0.23m
8:15PM0.01m
8:30AM0.33m
8:28PM0.06m
8:43AM0.44m
8:36PM0.13m
8:44AM0.56m
8:33PM0.21m
7:56AM0.66m
8:02PM0.28m
rain showers
part cloud
clear
part cloud
part cloud
clear
clear
clear
clear
part cloud
part cloud
clear
clear
clear
part cloud
clear
clear
clear
part cloud
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:13
7:11
7:11
7:09
7:09
7:07
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:09
6:10
6:12
6:12
6:13
6:14
6:14
 mm
1
Temp °C
15
15
16
17
17
19
23
14
15
15
15
16
16
14
13
13
13
15
16
15
Feels °C
11
11
13
14
13
11
17
9
13
12
13
13
12
11
10
10
10
13
12
12
  • 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 Cunns Surf forecast

The above surf forecast table for Cunns provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Cunns can be found by selecting the local surf guide option on the grey menu. Our Cunns 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 (Cunns) 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 Cunns 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.

Are you planning a holiday in Nullarbor? If you are looking for accommodation near Cunns, camping, hotels and holiday cottages in Nullarbor, consider staying in Thevenard which is 64 km (40 miles) away.

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