Surf Forecasts:
Cunns surf forecast from 13 Aug 2026:
- Best quality surf: Thursday 13 Aug, 9PM (local time) - 7ft (2.1m), 15s period, SW swell with cross-offshore winds.
- Most powerful swell: Friday 14 Aug, 6AM (local time) - 7ft (2.1m), 17s period, SW swell with 2,442 kJ wave energy.
- Next surfable swell (1★+): Thursday 13 Aug, 9PM (local time) - 7ft (2.1m), 15s 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 Thursday (Aug 13) at 9PM. The primary swell is predicted to be 2.1m and 15s 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 2.1m 17s and forecast to arrive on Friday (Aug 14) at 6AM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 4s period and expected on Sunday (Aug 16) at 6AM.
| Wave Type | Time (ACST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9PM (Thu 13th Aug) | 7ft (2.1m) 15s |
| Best Surf | 9PM (Thu 13th Aug) | 7ft (2.1m) 15s |
| Most Powerful | 6AM (Fri 14th Aug) | 7ft (2.1m) 17s |
Table - best surf conditions forecast for Cunns over the next 16 days.
The Lowdown
Alright, let’s get into what’s cooking for Cunns.
We’re looking at one spot here, a deep-water reef that’s picky and needs a very specific direction to really shine. This isn’t for the groms, it’s inconsistent, and when it turns on, it’s for the experienced crew. The water temp is sitting at 60°, which is pretty normal for this time of year.
The first window opens up on Thursday, August 13th. Thursday morning is looking solid with a 8ft SW groundswell, a long 16-second period, and glassy conditions. The combined energy is huge at 2516, so there’s a ton of power. That’s expert territory, but the wind is dead calm, so the faces will be clean. The afternoon gets a bit of a cross-shore breeze, knocking the quality down a notch.
Friday the 14th is the big standout. Both the morning and afternoon have a clean 7ft SW swell, with a 16-second period, and offshore to cross-off winds. The energy is still very strong (2193 and 2166). This is the best combo of size, power, and clean conditions. For a reef that needs an offshore, this is as good as it gets.
Saturday the 15th is still good, with the swell dropping a touch to 6-5ft, but the wind is fully offshore from the east all day. The energy is still strong (1513 and 1265). It’s a bit smaller, but still packing plenty of punch for the experienced.
Sunday the 16th is a step down in size to 4ft, but the wind is still clean. The period drops to 14 seconds, so the energy is moderate (668). Still a good wave, just not as heavy.
From Monday the 17th through the rest of the first week, we see a mix of smaller swells and less ideal winds. There’s a run of poor conditions from the 18th to the 24th, with strong onshore and cross-on winds, rain, and messy surf. The energy drops off significantly.
Then, on Wednesday the 26th of August, we get a late pulse. The morning shows an 8ft SW groundswell with a 16-second period, and the energy is through the roof at 5782. The wind is a clean cross-off. That’s a serious, powerful swell, only for experts. Thursday the 27th is still good, with a 6-5ft SW swell and offshore winds, but the energy is still strong (1432 and 1065). That’s a solid way to finish the run.
The very end of the period, on the 28th, fades out with small, weak swell and poor wind.
So, if you’re looking for the best of the best, Friday the 14th and Wednesday the 26th are the true standouts. The Friday is a guarantee, the Wednesday is a late-season bomb that could be epic. Expect crowds at Cunns, especially when it’s this good.
Rusty.
Short Range ForecastMostly dry. Very mild (max 17°C on Sat afternoon, min 14°C on Thu morning). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 2mm), mostly falling on Tue afternoon. Very mild (max 18°C on Tue morning, min 12°C on Tue afternoon). Mainly fresh winds. | ||||||||||||||||||||
Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | Monday 17 | Tuesday 18 | Wednesday 19 | |||||||||||||||
AM | 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 16 | SW 15 | SW 15 | SW 16 | SW 16 | SW 16 | SW 16 | SW 16 | SW 15 | SW 14 | SW 14 | SW 14 | SW 16 | SW 16 | SW 19 | SW 18 | SW 17 | SW 16 | SW 15 | SW 15 | SW 14 |
Wave Graph  | |||||||||||||||||||||
 kJ | 2516 | 2075 | 2075 | 2193 | 2166 | 1832 | 1513 | 1265 | 836 | 668 | 667 | 434 | 310 | 603 | 441 | 595 | 487 | 432 | 519 | 704 | 641 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | cross | cross-off | off | cross-off | off | off | off | off | cross-off | off | cross-off | cross-off | cross-off | cross-off | cross | cross | cross-off | off | cross-off | off |
High Tide | 1:06PM1.36m | 1:08AM0.91m | 1:19PM1.30m | 1:22AM1.00m | 1:29PM1.24m | 1:39AM1.08m | 1:39PM1.18m | 1:58AM1.12m | 1:49PM1.13m | 2:19AM1.13m | 1:59PM1.07m | 2:40AM1.10m | 2:07PM0.99m | 3:00AM1.03m | |||||||
Low Tide | 7:34PM0.13m | 6:52AM0.05m | 7:37PM0.11m | 7:13AM0.06m | 7:42PM0.07m | 7:34AM0.10m | 7:51PM0.03m | 7:53AM0.16m | 8:02PM0.01m | 8:12AM0.23m | 8:15PM0.01m | 8:30AM0.33m | 8:28PM0.06m | ||||||||
 | |  | | | | | |  | |  |  | | | |  |  | | | |  | |
 | 7:16 | — | — | 7:16 | — | — | 7:15 | — | — | 7:13 | — | — | 7:13 | — | — | 7:11 | — | — | 7:11 | — | — |
 | — | 6:08 | — | — | 6:08 | — | — | 6:09 | — | — | 6:09 | — | — | 6:10 | — | — | 6:12 | — | — | 6:12 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2 | — | — | — | 6 |
Temp °C | 14 | 15 | 15 | 15 | 15 | 15 | 15 | 17 | 16 | 15 | 16 | 15 | 16 | 17 | 16 | 18 | 14 | 15 | 16 | 17 | 15 |
Feels °C | 13 | 13 | 13 | 13 | 11 | 11 | 10 | 13 | 12 | 11 | 11 | 10 | 12 | 13 | 11 | 13 | 11 | 14 | 14 | 14 | 15 |
Swell 1 Height (m) Direction Period (s) | SW 16 | SW 15 | SW 15 | SW 16 | SW 16 | SW 16 | SW 16 | SW 16 | SW 15 | SW 14 | SW 14 | SW 14 | SW 13 | SW 16 | SW 14 | SW 18 | SW 17 | SW 16 | SW 15 | SW 15 | SW 14 |
| kJ | 2516 | 2075 | 2075 | 2193 | 2166 | 1832 | 1513 | 1265 | 836 | 668 | 667 | 434 | 286 | 603 | 346 | 595 | 487 | 432 | 519 | 704 | 641 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | SSE 5 | SW 16 | SW 22 | SW 19 | — | S 10 | — | SW 4 | SW 20 | SW 17 |
| kJ | — | — | — | — | — | — | — | — | — | — | — | 8 | 310 | 163 | 441 | — | 2 | — | 4 | 61 | 350 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | SW 23 | — | S 10 | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | 86 | — | 17 | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | SW 16 | — | — | — | — | — | — | E 2 | E 4 | ESE 2 | E 3 | — | — | — | NNE 4 | NW 4 | NW 4 | S 4 | SSW 15 | SE 2 |
| kJ | — | 61 | — | — | — | — | — | — | 1 | 7 | 1 | 8 | — | — | — | 13 | 12 | 3 | 1 | 87 | 1 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 648 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 401 | 0 | 0 | 0 | 491 | 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.
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