Surf Forecasts:
Cunns surf forecast from 18 Aug 2026:
- Best quality surf: Wednesday 19 Aug, 9PM (local time) - 4.5ft (1.4m), 15s period, SW swell with offshore winds.
- Most powerful swell: Friday 21 Aug, 12PM (local time) - 5ft (1.6m), 17s period, SW swell with 1,506 kJ wave energy.
- Next surfable swell (1★+): Wednesday 19 Aug, 9PM (local time) - 4.5ft (1.4m), 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 Wednesday (Aug 19) at 9PM. The primary swell is predicted to be 1.4m and 15s period with a secondary swell of 0.8m and 18s. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Cunns in the next 16 days are 1.6m 17s and forecast to arrive on Friday (Aug 21) at 12PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.3m 3s period and expected on Sunday (Aug 23) at 12AM.
| Wave Type | Time (ACST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9PM (Wed 19th Aug) | 4.5ft (1.4m) 15s |
| Best Surf | 9PM (Wed 19th Aug) | 4.5ft (1.4m) 15s |
| Most Powerful | 12PM (Fri 21st Aug) | 5ft (1.6m) 17s |
Table - best surf conditions forecast for Cunns over the next 16 days.
The Lowdown
Alright, Rusty here, and I’ve got the lowdown on the next 16 days for Cunns.
First up, it’s a slow start. We’re looking at Tuesday the 18th and Wednesday the 19th with nothing but poor surf and onshore wind. The water temp is sitting at 59°F, which is pretty normal for this time of year, nothing unusual there.
The first real signs of life show up on Thursday morning the 20th, but it’s only marginal. The standout day early on is Friday the 21st. By the afternoon, we’ve got a clean 5ft swell from the SW with a long 17-second period and a nice cross-off breeze. The combined energy is pumping at 1558, and the conditions are clean. This is for experienced surfers, and it’s the best on offer in the first week.
Saturday the 22nd holds similar size and quality, with clean waves all day. By Sunday the 23rd, the morning gets a bit messy with a cross-shore breeze, but Sunday afternoon turns glassy with a 4ft SW swell. That’s a genuine treat.
We then hit a bit of a lull from Monday the 24th through Wednesday the 26th, with smaller surf and poor conditions, including a near gale on Wednesday morning. Don’t bother.
Now, the real beast shows up on Thursday the 27th. The afternoon brings a solid 12ft SW swell with a massive 8789 combined energy. That’s big, powerful, and only for experts. The wind is offshore, so it’s clean, but this is a serious step up in size. This is the standout of the whole 16-day run.
The following days, from the 28th through the 30th, have good clean conditions but the swell drops back to the 4ft to 7ft range. The 30th of August looks especially nice with a clean 4ft SW swell and a 16-second period, plus offshore wind.
The first two days of September kick off with clean, glassy conditions. The 1st of September has a clean 3ft swell with offshore wind, and the 2nd of September has the best period of the late run: a 4ft SW swell at 17 seconds with glassy conditions. Excellent for experienced surfers.
So, if you’re picking the best, it’s Friday the 21st for the clean, long-period groundswell, and Thursday the 27th for the big, powerful, expert-only swell. Don’t sleep on that Sunday afternoon glass-off on the 23rd either.
Rusty.
Short Range ForecastMostly dry. Warm (max 21°C on Tue afternoon, min 14°C on Tue night). Winds decreasing (fresh winds from the W on Tue afternoon, light winds from the S by Thu night). | Days 5-7 Weather SummarySome drizzle, heaviest during Mon morning. Warm (max 20°C on Sun afternoon, min 13°C on Fri night). Wind will be generally light. | |||||||||||||||||||
Tue 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | ||||||||||||||
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 17 | WSW 16 | SW 15 | SW 15 | SW 15 | SW 16 | SW 16 | SW 15 | SW 15 | SW 17 | SW 16 | SW 15 | SW 15 | SW 14 | SW 17 | SW 16 | SW 15 | SW 14 | SW 14 | SW 13 |
Wave Graph  | ||||||||||||||||||||
 kJ | 482 | 1376 | 385 | 893 | 685 | 489 | 574 | 939 | 868 | 1484 | 1402 | 1232 | 1123 | 746 | 1267 | 886 | 542 | 341 | 440 | 286 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross-on | on | cross-on | cross-off | cross-on | cross | cross-off | cross | cross-off | cross-off | cross-off | cross-off | cross-off | cross | glassy | cross-off | on | cross-off | off |
High Tide | 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 | 11:50AM0.92m | 1:02AM0.62m | 11:40AM1.06m | 00:18AM0.68m | |||||||
Low Tide | 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 | 5:37AM0.64m | 7:09PM0.28m | 5:03AM0.50m | 6:40PM0.23m | |||||||
 |  |  | |  |  | | | | |  | | | | | | |  | | | |
 | — | — | 7:11 | — | — | 7:09 | — | — | 7:09 | — | — | 7:07 | — | — | 7:05 | — | — | 7:05 | — | — |
 | 6:12 | — | — | 6:12 | — | — | 6:13 | — | — | 6:14 | — | — | 6:14 | — | — | 6:15 | — | — | 6:15 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | — | — |
Temp °C | 21 | 14 | 15 | 15 | 15 | 16 | 17 | 15 | 15 | 14 | 14 | 15 | 16 | 14 | 19 | 20 | 18 | 19 | 17 | 15 |
Feels °C | 14 | 9 | 12 | 12 | 12 | 13 | 15 | 13 | 12 | 11 | 11 | 13 | 13 | 11 | 15 | 18 | 15 | 16 | 12 | 13 |
Swell 1 Height (m) Direction Period (s) | SW 17 | — | WSW 8 | SW 15 | SW 15 | SW 16 | SW 16 | SW 15 | SW 15 | SW 17 | SW 16 | SW 15 | SW 15 | SW 14 | SW 17 | SW 16 | SW 15 | SW 14 | — | SW 13 |
| kJ | 482 | — | 188 | 893 | 685 | 489 | 574 | 939 | 868 | 1484 | 1402 | 1232 | 1123 | 746 | 1267 | 886 | 542 | 341 | — | 286 |
Swell 2 Height (m) Direction Period (s) | — | — | SW 15 | SW 20 | SW 18 | SW 9 | SW 9 | SW 19 | SW 18 | — | — | SW 24 | SW 21 | SW 19 | — | — | SW 22 | SW 20 | — | SW 18 |
| kJ | — | — | 385 | 99 | 201 | 79 | 59 | 303 | 375 | — | — | 22 | 162 | 361 | — | — | 18 | 61 | — | 152 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | NW 4 | WSW 16 | SW 8 | SW 15 | — | — | SW 16 | SW 16 | SW 17 | SW 17 | — | — | — | ESE 3 | — | — | — | — | SW 14 | SW 5 |
| kJ | 9 | 1376 | 17 | 78 | — | — | 66 | 62 | 104 | 74 | — | — | — | 2 | — | — | — | — | 440 | 29 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 401 | 649 | 978 | 1045 | 0 | 0 | 510 | 0 | 552 | 0 | 132 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 632 | 0 |
Best forecast wave conditions in Nullarbor | ||||||||||||||||||||
Best forecast wave conditions in Australia | ||||||||||||||||||||
Header Global | ||||||||||||||||||||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
FREE! Surf-Forecast.com widget for your website
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.
Nearest