Cunns Surf Break

Lat Long: 32.10° S 132.98° E

Cunns Surf Forecast and Surf Report

Issued: 8 am 21 Aug 2026 (local time)

Forecast update in  hr  min

Today's Cunns sea temperature is
15.2° C
0.4° 

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


Cunns surf forecast from 21 Aug 2026:

  • Best quality surf: Friday 21 Aug, 3PM (local time) - 5.5ft (1.7m), 16s period, SW swell with cross-offshore winds.
  • Most powerful swell: Friday 28 Aug, 3AM (local time) - 7.5ft (2.3m), 17s period, SW swell with 2,970 kJ wave energy.
  • Next surfable swell (1★+): Friday 21 Aug, 3PM (local time) - 5.5ft (1.7m), 16s 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 Friday (Aug 21) at 3PM. The primary swell is predicted to be 1.7m and 16s period. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Cunns in the next 16 days are 2.3m 17s and forecast to arrive on Friday (Aug 28) at 3AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 3s period and expected on Sunday (Aug 23) at 9AM.

Wave TypeTime (ACST) & Date Wave Height & Period
Next good surf (1 star+) 3PM (Fri 21st Aug)5.5ft (1.7m) 16s
Best Surf 3PM (Fri 21st Aug)5.5ft (1.7m) 16s
Most Powerful 3AM (Fri 28th Aug)7.5ft (2.3m) 17s

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


The Lowdown

G’day, I’m Rusty, and I’ve been watchin’ this stretch of coast like a hawk. We’ve got a single spot on the radar here, and it’s a bit of a specialty wave. Let’s break it down.

First up, the standout window is the opening weekend. We’re talkin’ Cunns, a reef setup that’s made for the experienced crew – it’s an advanced wave and it’s inconsistent, so when it’s on, it’s a treat. The water’s sittin’ at 59°, which is pretty much what you’d expect for this time of year, no surprises there.

The action kicks off on Friday morning, August 21st. We’ve got a solid 5ft SW groundswell, with a long 15-second period, and the combined energy is pumpin’ at 1399. That’s a moderate-strong energy level, which translates to a heap of push. The wind’s a gentle S’ly cross-off, keepin’ the face clean. This is prime for experienced surfers only – the power’s there, and the reef needs respect. The swell’s comin’ from the SW, which is exactly what this break likes to see. Friday afternoon holds similar energy, with the swell bumpin’ to 6ft and the period stretchin’ to 16 seconds – energy up to 1606. It’s still clean, still cross-off. This is the best of the lot.

Saturday morning, August 22nd, is more of the same goodness. The swell’s 5ft from the SW, 15-second period, 1302 energy, and the wind swings to a light ESE offshore. That’s glassy, clean conditions. Saturday afternoon sees the swell ease a touch to 5ft, with a cross-off breeze, but it’s still a quality wave for the advanced crew.

Sunday morning, August 23rd, is where it starts to fray. The swell’s still 5ft, with a very long 17-second period, energy at 1388, but the wind’s a moderate NNE cross-off. It’s still rideable, but the quality drops. By Sunday afternoon, the swell drops to 5ft, period 16 seconds, energy 979, and the wind goes cross-shore, bringin’ a bit of chop. The magic’s wearin’ off.

From Monday, August 24th, through to the end of the first week, it’s a write-off. Strong winds, rain, messy cross-shore winds, and choppy conditions. The swell sticks around, but the wind ruins it. On Tuesday, August 25th, we see a bigger 6ft SW swell, but it’s accompanied by a fresh cross-shore wind that’s lumpy as hell. Not worth paddlin’ out for a clean wave.

The next flicker of hope comes on Wednesday afternoon, August 26th. The swell’s dropped to 3ft, 13-second period, energy 470, but the wind goes light offshore from the E. That’s clean, but it’s small. Not a standout, but a possible sneaky session for the patient.

Thursday, August 27th, is a no-go – strong winds, lumpy, and the swell’s all over the place. The period jumps to 20 seconds on Thursday morning, but with a fresh cross-shore blowin’, it’s just messy.

The week of August 28th to September 1st is a write-off for paddle surfing. The swell gets big – 7ft to 10ft – but the wind is howlin’ from the WSW at near gale force. That’s cross-onshore and blown out. This setup is more interesting for kite surfing than paddle surfing, honestly. The energy’s through the roof, with values up to 4508, but it’s not for a surfer on a shortboard.

Things improve a bit on Monday, August 31st. The swell settles to 4ft from the SW, with a 15-second period, energy 838, and a light S’ly cross-off wind. That’s clean again, and the conditions are very good. It’s a solid option for the experienced crew, but it’s not as powerful as that first weekend.

The rest of the run into September is a mixed bag. There’s occasional clean windows, like Wednesday afternoon, September 2nd, with a 3ft swell and light onshore wind, but it’s small. The wind tends to be cross-onshore or onshore, keepin’ the quality marginal. The swell direction stays mostly SW, which is what this reef wants, but the wind is the enemy.

So, the clear standout is Friday and Saturday, August 21st and 22nd. That’s the pick of the 16-day window. Clean, powerful SW groundswell, with the right wind, and the energy is moderate-strong. Get it while it’s good. The rest of the window is mostly wind-affected, with a few small, clean moments that are worth a look if you’re desperate.

Rusty.

Short Range Forecast

Moderate rain (total 10mm), heaviest on Sun night. Warm (max 21°C on Sun afternoon, min 13°C on Fri morning). Wind will be generally light.

Days 4-6 Weather Summary

Light rain (total 5mm), mostly falling on Mon morning. Very mild (max 19°C on Wed night, min 11°C on Wed morning). Winds decreasing (fresh winds from the SSW on Mon afternoon, calm by Wed afternoon).

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)
4
4
4
4
4
3
2
1
2
0
1
0
1
2
3
1
2
0
1
1
1
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.6
SW
15
1.7
SW
16
1.7
SW
16
1.6
SW
15
1.5
SW
15
1.5
SW
15
1.5
SW
17
1.3
SW
16
1.1
SW
15
0.9
SW
14
1.7
SW
14
2.3
SW
8
2
SW
15
1.7
SW
14
1.4
SW
14
1.2
SW
13
1
SW
13
1
SW
15
0.8
SW
21
1.8
SW
19
1.8
SW
18
Wave Graph
Metric surfscale
Energy kJ
1048
1511
1402
1216
936
924
1267
886
550
341
1107
567
1823
1155
747
495
320
410
513
2291
1904
Wind (km/h)
15
S
15
S
15
SSE
10
NE
15
SSE
15
E
25
NNE
25
NNE
15
NNE
20
WNW
30
SW
35
SSW
25
SSW
15
SW
5
NW
20
NNE
5
N
20
NNE
35
N
20
NNW
30
NNE
Wind State
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross
cross
cross
on
cross
cross
cross
cross
glassy
cross
glassy
cross
cross
cross-on
cross
High Tide
1:48PM0.84m
3:31AM0.80m
12:48PM0.83m
2:55AM0.66m
11:50AM0.92m
1:02AM0.62m
11:40AM1.06m
00:18AM0.68m
11:50AM1.19m
00:13AM0.78m
12:06PM1.30m
00:22AM0.89m
12:24PM1.38m
00:36AM1.00m
Low Tide
8:33PM0.21m
7:56AM0.66m
8:02PM0.28m
5:37AM0.64m
7:09PM0.28m
5:03AM0.50m
6:40PM0.23m
5:15AM0.35m
6:35PM0.15m
5:35AM0.21m
6:40PM0.08m
5:57AM0.09m
6:51PM0.02m
clear
part cloud
part cloud
clear
clear
clear
clear
cloud
mod rain
light rain
part cloud
clear
cloud
cloud
part cloud
clear
clear
clear
clear
clear
rain showers
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:09
7:07
7:05
7:05
7:03
7:03
7:01
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:14
6:14
6:15
6:15
6:15
6:16
6:16
 mm
10
5
1
Temp °C
13
13
14
15
16
15
19
21
20
15
15
14
14
14
14
15
18
19
22
25
23
Feels °C
10
10
12
13
12
12
13
15
14
12
10
7
9
10
12
11
16
14
16
20
19
  • 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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