
Surf Forecasts:
Cunns surf forecast from 6 Sep 2026:
- Best quality surf: Tuesday 8 Sep, 12AM (local time) - 3.5ft (1.1m), 18s period, SW swell with offshore winds.
- Most powerful swell: Wednesday 9 Sep, 6PM (local time) - 8ft (2.4m), 17s period, SSW swell with 3,336 kJ wave energy.
- Next surfable swell (1★+): Monday 7 Sep, 9AM (local time) - 3ft (0.9m), 13s 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 Monday (Sep 07) at 9AM. The primary swell is predicted to be 0.9m and 13s period with a secondary swell of 0.3m and 5s. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Cunns in the next 16 days are 2.4m 17s and forecast to arrive on Wednesday (Sep 09) at 6PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.2m 6s period and expected on Wednesday (Sep 09) at 3AM.
| Wave Type | Time (ACST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9AM (Mon 7th Sep) | 3ft (0.9m) 13s |
| Best Surf | 12AM (Tue 8th Sep) | 3.5ft (1.1m) 18s |
| Most Powerful | 6PM (Wed 9th Sep) | 8ft (2.4m) 17s |
Table - best surf conditions forecast for Cunns over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let's have a look at what's coming down the pipe for the next couple of weeks.
We’ve got one main spot on the radar, and it’s a bit of a specialist’s wave. The overall pattern shows a solid run of south-west swell, but it’s gonna take the right wind and tide to really get Cunns firing. There’s a bit of a lull mid-period, but the first few days and the end of the run have some real potential.
Starting off, we have some clean waves on offer. Sunday the 6th is a bit of a write-off with a cross-off breeze and a marginal call, but then things kick off properly. Monday morning the 7th sees some clean, chest-high swell from the SW with a nice offshore wind. It’s not huge, but it’s a fun prospect. The afternoon picks up to a touch over 4ft from the SSW with a clean offshore breeze, making for very good conditions. The water's sitting at 60°F, which is pretty much bang on average for this time of year, so no surprises there.
The real standout in this first week is Tuesday the 8th morning. We’re looking at a solid 5ft of SW groundswell, with a period of 17 seconds. That’s a proper long-period swell, the kind that brings real power and shape. The wind is a gentle offshore from the ESE, meaning the surface will be glassy. The combined energy is massive, clocking in at 1519, so you can feel the oomph in the water. This is a wave for experienced surfers only, as it’ll be a heavy, walling reef break. The afternoon stays clean but the wind swings a touch cross-off, so it’s not quite as perfect.
Wednesday the 9th gets a bit wild. The swell stays solid, around 5-6ft from the SW with a very long period of 16-18 seconds, but the wind is a strong offshore breeze coming in at 25 mph. While that keeps the surface clean, it’s going to be a real battle to get out the back. The energy is extreme, with numbers like 2013 and 2257, but it’s more of a battle than a pleasure. This is for the hardcore crew only.
The week fades from there. Thursday the 10th has a cracking afternoon session with 6ft of clean SW swell and a moderate offshore, another excellent window for experienced surfers. But from Friday the 11th through to Sunday the 13th, the wind turns messy, going cross-shore and cross-on, and the surf quality drops off a cliff. We’re looking at a few days of poor to marginal conditions as the swell drops and the wind chops things up.
There’s a gap of a few days with no real standouts, but we get a second wind. Tuesday the 15th morning sees a return to form: a clean 5ft of SW swell with a gentle offshore breeze from the east. The energy is moderate at 1063, but the conditions are pristine. That’s another top pick for the experienced crew. The rest of that week stays clean but smaller, with some very good morning sessions on the Wednesday and Thursday the 16th and 17th, though the wind is lighter.
Now, looking further out, we have a big, promising but uncertain signal. The 21st of September (Monday) is a date to circle. The morning shows a solid 7ft of SW swell with a long period of 16 seconds, and a clean cross-off wind. The combined energy is 3106, which is serious. But the real monster is that Monday afternoon: a massive 13ft of SW groundswell with a period of 21 seconds. The energy reading is 19187 – that’s proper, heavy, dangerous ocean. The file says it’s predicted to be too big for this break, but for the absolute elite, that’s a gun-barrel day if the wind holds. Treat that one with a lot of caution though; it’s a long way out and the forecast could change.
So, to wrap it up: The best on offer is Tuesday the 8th morning for a classic, powerful, clean reef wave, and then Tuesday the 15th morning for a slightly smaller but equally clean session. The 21st of September is a wildcard for the true big-wave specialists.
Stay safe out there.
Rusty.
Short Range ForecastLight rain (total 2mm), mostly falling on Tue morning. Very mild (max 15°C on Mon afternoon, min 11°C on Sun night). Winds increasing (light winds from the ENE on Mon night, strong winds from the ESE by Wed morning). | Days 5-7 Weather SummaryMostly dry. Warm (max 24°C on Sat morning, min 8°C on Wed night). Winds decreasing (strong winds from the SE on Wed afternoon, light winds from the NE by Fri afternoon). | |||||||||||||||||||
Sun 6 | Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | ||||||||||||||
PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map | ||||||||||||||||||||
Wave Height (m) Direction Period (s) | SW 14 | SW 13 | SW 13 | SSW 13 | SW 18 | SW 17 | SW 16 | SW 16 | SW 16 | SW 18 | SW 16 | SW 16 | SW 16 | SW 15 | SW 14 | SW 15 | SW 16 | SW 15 | SW 18 | SW 18 |
Wave Graph | ||||||||||||||||||||
1123 | 495 | 286 | 440 | 850 | 1519 | 1151 | 1096 | 1230 | 2076 | 1925 | 1571 | 1412 | 881 | 598 | 551 | 661 | 330 | 210 | 607 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | off | off | off | off | off | cross-off | cross-off | off | off | off | cross-off | off | cross-off | cross-off | cross-off | cross-off | cross | cross-on | cross |
High Tide | 1:29AM0.68m | 11:44AM1.13m | 00:44AM0.70m | 11:57AM1.23m | 00:28AM0.79m | 12:11PM1.28m | 00:26AM0.90m | 12:24PM1.29m | 00:33AM1.03m | 12:37PM1.26m | 00:44AM1.14m | 12:48PM1.22m | 00:58AM1.24m | |||||||
Low Tide | 7:06PM0.13m | 5:24AM0.54m | 6:51PM0.12m | 5:29AM0.37m | 6:45PM0.11m | 5:45AM0.23m | 6:43PM0.10m | 6:04AM0.12m | 6:44PM0.07m | 6:23AM0.05m | 6:47PM0.04m | 6:43AM0.02m | 6:53PM-0.01m | |||||||
— | — | 6:48 | — | — | 6:47 | — | — | 6:46 | — | — | 6:43 | — | — | 6:43 | — | — | 6:41 | — | — | |
6:23 | — | — | 6:23 | — | — | 6:24 | — | — | 6:24 | — | — | 6:25 | — | — | 6:27 | — | — | 6:27 | — | |
mm | — | — | — | — | — | 1 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 14 | 13 | 14 | 15 | 15 | 13 | 13 | 13 | 12 | 13 | 13 | 14 | 18 | 17 | 19 | 23 | 22 | 24 | 27 | 26 |
Feels °C | 9 | 8 | 10 | 11 | 12 | 9 | 10 | 7 | 4 | 5 | 6 | 8 | 12 | 11 | 13 | 17 | 16 | 16 | 22 | 20 |
Swell 1 Height (m) Direction Period (s) | SW 14 | SW 13 | SW 13 | SSW 13 | SW 18 | SW 17 | SW 16 | SW 16 | SW 16 | SW 18 | SW 16 | SW 16 | SW 16 | SW 15 | SW 14 | SW 15 | SW 16 | SW 15 | SW 14 | SW 18 |
1123 | 495 | 286 | 440 | 850 | 1519 | 1151 | 1096 | 1230 | 2076 | 1925 | 1571 | 1412 | 881 | 598 | 551 | 661 | 330 | 200 | 607 | |
Swell 2 Height (m) Direction Period (s) | — | SW 23 | S 5 | SW 20 | SW 13 | — | — | — | SW 20 | — | — | — | SW 26 | SW 25 | SW 24 | — | — | SW 20 | SW 18 | SSW 10 |
— | 21 | 5 | 204 | 202 | — | — | — | 640 | — | — | — | 26 | 25 | 22 | — | — | 134 | 210 | 18 | |
Swell 3 Height (m) Direction Period (s) | — | — | SW 21 | — | — | — | — | — | S 7 | — | — | — | — | — | — | — | — | — | S 11 | — |
— | — | 71 | — | — | — | — | — | 1 | — | — | — | — | — | — | — | — | — | 35 | — | |
Wind waves Height (m) Direction Period (s) | — | SSE 4 | ESE 4 | SE 3 | SE 5 | — | SSE 4 | SSE 5 | SSE 7 | S 8 | SE 7 | E 4 | ESE 2 | E 2 | NE 3 | — | — | N 3 | NNW 4 | — |
— | 34 | 23 | 1 | 38 | — | 19 | 74 | 142 | 181 | 171 | 21 | 1 | 1 | 7 | — | — | 8 | 7 | — | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 491 | 287 | 0 | 0 | 0 | 0 | 552 | 491 | 1626 | 1577 | 153 | 243 | 0 | 0 | 146 | 0 | 0 | 401 | 178 | 0 |
Best forecast wave conditions in Nullarbor | ||||||||||||||||||||
Best forecast wave conditions in Australia | ||||||||||||||||||||
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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.










