Surf Forecasts:
Cunns surf forecast from 23 Aug 2026:
- Best quality surf: Tuesday 25 Aug, 6PM (local time) - 5ft (1.6m), 14s period, SW swell with cross-offshore winds.
- Most powerful swell: Friday 28 Aug, 12PM (local time) - 7.5ft (2.3m), 16s period, SW swell with 2,513 kJ wave energy.
- Next surfable swell (1★+): Monday 24 Aug, 3AM (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 Monday (Aug 24) at 3AM. The primary swell is predicted to be 1.1m and 14s 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 16s and forecast to arrive on Friday (Aug 28) at 12PM. 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 5s period and expected on Sunday (Aug 30) at 9PM.
| Wave Type | Time (ACST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3AM (Mon 24th Aug) | 3.5ft (1.1m) 14s |
| Best Surf | 6PM (Tue 25th Aug) | 5ft (1.6m) 14s |
| Most Powerful | 12PM (Fri 28th Aug) | 7.5ft (2.3m) 16s |
Table - best surf conditions forecast for Cunns over the next 16 days.
The Lowdown
Alright, Rusty here again, breaking it down for you. We've got a long outlook ahead, and the first few days are a bit of a bummer, honestly. The wind's just howling from the wrong directions, making a mess of things. But stick with me, because there's some serious gold hidden in the back half.
The one you're gonna want to circle on your calendar is Monday, August 31st. The morning session at Cunns is the clear winner. We've got a solid 6ft swell from the southwest, with a long 16-second period that's gonna pump a ton of energy. The combined energy of all swells is a solid 1503, so you'll feel the push. And the kicker? A clean, offshore wind from the southeast. That's the recipe for a top-notch day. It's a reef break, and it's inconsistent, but when the swell lines up like this, it's gonna be worth the wait. The water temp is about what you'd expect for this time of year.
If you're looking a little further out, keep an eye on Saturday, September 5th. The afternoon at Cunns is another real standout. We're looking at a 6ft southwest swell, an even longer 17-second period, and the combined energy jumps to 1848. The wind is forecast to go glassy, light offshore. For a reef break that loves long-period groundswell, that's a dream setup. This one's a long-range call, so don't get too attached, but it's a very promising prospect.
Before that, there are a few other windows. Tuesday, September 1st afternoon has a small 4ft swell with glassy conditions, and the combined energy is a modest 559, but it'll be clean. The afternoon of Saturday, August 29th has a fresh offshore breeze, but the swell is a weaker 6ft with a shorter 10-second period.
The very end of the run, Tuesday, September 8th morning, is worth a mention. It's got a solid 8ft southwest swell with a 15-second period, and a light offshore wind. The combined energy is a strong 2413. On a reef, that's going to be powerful and clean, but that size is getting into the "experts only" zone.
So, look, the first week is a bit of a fight with the wind. But don't let that get you down. The end of August and the start of September are holding some absolute beauties.
Rusty.
Short Range ForecastLight rain (total 7mm), mostly falling on Sun night. Warm (max 20°C on Wed afternoon, min 11°C on Tue night). Winds decreasing (fresh winds from the SSW on Mon afternoon, light winds from the ENE by Tue night). | Days 5-7 Weather SummaryModerate rain (total 12mm), heaviest on Fri night. Warm (max 25°C on Thu afternoon, min 12°C on Fri night). Winds decreasing (strong winds from the N on Thu morning, light winds from the S by Sat morning). | ||||||||||||||||||
Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | ||||||||||||||
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 15 | SW 14 | SW 14 | SW 13 | SW 15 | SW 14 | SW 14 | SW 13 | SW 12 | SW 15 | SW 14 | SW 19 | SW 17 | SW 16 | SW 16 | SW 14 | SW 14 | SW 10 | SSW 9 |
Wave Graph  | |||||||||||||||||||
 kJ | 550 | 393 | 787 | 821 | 1474 | 1155 | 656 | 488 | 260 | 301 | 331 | 1460 | 2054 | 2413 | 2214 | 2053 | 1688 | 585 | 385 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-on | cross | cross | cross | cross | cross-off | cross | cross-off | cross | cross | cross | on | cross-on | cross-on | cross-on | cross-on | off | cross-off |
High Tide | 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 | 12:43PM1.41m | 00:53AM1.09m | 1:03PM1.40m | 1:13AM1.18m | ||||||
Low Tide | 5:03AM0.50m | 6:40PM0.23m | 5:15AM0.35m | 6:35PM0.15m | 5:35AM0.21m | 6:40PM0.08m | 5:57AM0.09m | 6:51PM0.02m | 6:21AM0.00m | 7:04PM-0.02m | 6:45AM-0.05m | 7:18PM-0.05m | |||||||
 |  |  |  |  | |  | | | | |  | | | | | | | | |
 | — | 7:05 | — | — | 7:03 | — | — | 7:03 | — | — | 7:01 | — | — | 7:01 | — | — | 6:58 | — | — |
 | 6:15 | — | 6:15 | — | — | 6:15 | — | — | 6:16 | — | — | 6:16 | — | — | 6:17 | — | — | 6:19 | — |
mm | 4 | 1 | 1 | 1 | — | — | — | — | — | — | — | — | 3 | — | 1 | 3 | 4 | 1 | — |
Temp °C | 16 | 15 | 15 | 14 | 14 | 13 | 13 | 16 | 20 | 19 | 22 | 25 | 19 | 14 | 14 | 14 | 15 | 15 | 14 |
Feels °C | 13 | 13 | 8 | 8 | 9 | 9 | 12 | 13 | 16 | 14 | 13 | 17 | 12 | 7 | 8 | 8 | 13 | 9 | 9 |
Swell 1 Height (m) Direction Period (s) | SW 15 | SSW 20 | — | — | WSW 8 | SW 14 | SW 14 | SW 13 | SW 12 | SW 15 | SW 14 | SW 19 | — | — | — | — | — | SW 13 | SSW 9 |
| kJ | 550 | 37 | — | — | 11 | 1155 | 656 | 488 | 260 | 301 | 331 | 1460 | — | — | — | — | — | 173 | 385 |
Swell 2 Height (m) Direction Period (s) | — | SW 20 | — | — | — | SSW 7 | — | — | SW 16 | SW 23 | SW 20 | SW 14 | — | — | — | — | — | SW 20 | SW 13 |
| kJ | — | 15 | — | — | — | 138 | — | — | 90 | 21 | 264 | 7 | — | — | — | — | — | 15 | 78 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | SW 24 | SW 21 |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 22 | 71 |
Wind waves Height (m) Direction Period (s) | ENE 4 | SW 14 | SW 14 | SW 13 | SW 15 | SW 14 | — | — | — | — | N 4 | NNW 4 | SW 17 | SW 16 | SW 16 | SW 14 | SW 14 | SW 10 | SE 3 |
| kJ | 11 | 393 | 787 | 821 | 1474 | 52 | — | — | — | — | 27 | 20 | 2054 | 2413 | 2214 | 2053 | 1688 | 585 | 1 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 0 | 302 | 401 | 491 | 1052 | 552 | 0 | 0 | 0 | 0 | 564 | 401 | 564 | 564 | 491 | 500 | 203 | 491 | 837 |
Best forecast wave conditions in Nullarbor | |||||||||||||||||||
Best forecast wave conditions in Australia | |||||||||||||||||||
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The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Cunns surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
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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