
Surf Forecasts:
Cunns surf forecast from 12 Aug 2026:
- Best quality surf: Thursday 13 Aug, 6AM (local time) - 7.5ft (2.3m), 16s period, SW swell with cross-offshore winds.
- Most powerful swell: Wednesday 12 Aug, 3PM (local time) - 10ft (3.0m), 16s period, SW swell with 4,941 kJ wave energy.
- Next surfable swell (1★+): Thursday 13 Aug, 6AM (local time) - 7.5ft (2.3m), 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 Thursday (Aug 13) at 6AM. The primary swell is predicted to be 2.3m 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 3.0m 16s and forecast to arrive on Wednesday (Aug 12) at 3PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 4s period and expected on Sunday (Aug 16) at 9PM.
| Wave Type | Time (ACST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6AM (Thu 13th Aug) | 7.5ft (2.3m) 16s |
| Best Surf | 6AM (Thu 13th Aug) | 7.5ft (2.3m) 16s |
| Most Powerful | 3PM (Wed 12th Aug) | 10ft (3.0m) 16s |
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 shaping up for Cunns. We've got a decent run ahead, but it's not for the faint of heart.
First up, this spot is a reef break, exposed to the SW, and it's inconsistent – it doesn't turn on often, so when it does, you pay attention. The water temp is sitting at 59°, which is about average for this time of year, so nothing crazy there.
The pattern kicks off on Thursday the 13th. After some messy, blown-out stuff on Wednesday that you're best off skipping, we get a solid pulse of SW groundswell. Thursday morning sees a clean 8ft of SW swell with a long 16-second period. The wind is a light cross-off, keeping things tidy. This is proper advanced territory – over 8ft on the charts means it's experts-only, but with that kind of period and clean conditions, it's going to be pumping. The energy is strong at 2516.
That quality holds right through Friday and into Saturday. Friday morning is the real standout: 7ft of SW swell, 16-second period, and glassy offshore wind from the ESE. The energy is still high at 2220. This is as good as it gets here. Saturday stays clean with offshore winds, though the swell drops a touch to 6ft, still with plenty of grunt. Sunday and Monday the swell backs off, and conditions become more marginal – still worth a look for the dedicated, but you'll be scratching for the better ones.
There's a noticeable gap in quality after Monday the 17th. The wind goes onshore and the surf becomes poor or marginal through the middle of the week. It's not worth paddling out from Tuesday the 18th through to around Thursday the 20th. You might see a brief window late on Thursday the 20th when the wind goes glassy and the swell is a small 3ft, but that's a long shot.
Friday the 21st brings a new pulse of SW swell, pushing back up to 6ft, but the wind is cross-onshore, making it choppy. Not the clean conditions we saw earlier. Saturday the 22nd is a complete write-off with strong winds. The real potential for a second hit comes on Sunday the 23rd afternoon. A big 10ft W swell rolls in with a 17-second period, and the energy is massive at 5491. However, the wind is light cross-onshore, which might just be enough to keep it from being perfect. This one is a big, powerful groundswell – best at a reef like this, but you need to know what you're doing as that size is purely for experts.
After that, things get a bit messy again moving into the second week. There's a final window on Wednesday the 26th morning. The swell drops back to 6ft from the SW, but the wind goes offshore and glassy from the East. The energy is still solid at 1700, and it will be clean. This is another promising but less certain call that far out.
The best on offer: Friday the 14th and Saturday the 15th. Clean, offshore winds and a solid, long-period SW groundswell. Cunns will be working, but expect crowds, as this setup doesn't come around often.
Rusty.
Short Range ForecastMostly dry. Very mild (max 15°C on Wed morning, min 14°C on Wed morning). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Very mild (max 17°C on Sat afternoon, min 11°C on Sun night). Wind will be generally light. | ||||||||||||||||||||
Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | Monday 17 | Tuesday 18 | |||||||||||||||
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 17 | SW 16 | SW 16 | 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 15 | SW 18 | SW 17 | SW 16 |
Wave Graph | |||||||||||||||||||||
3791 | 4941 | 2538 | 2516 | 2075 | 1932 | 2220 | 2017 | 1832 | 1392 | 1155 | 847 | 668 | 581 | 440 | 643 | 603 | 410 | 595 | 413 | 314 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-on | cross-off | cross-off | cross-off | off | off | off | off | off | off | cross-off | off | off | cross-off | off | cross-off | cross | cross-on | cross-on |
High Tide | 12:48PM1.38m | 00:57AM0.80m | 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 | |||||||
Low Tide | 7:30PM0.12m | 6:29AM0.08m | 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 | ||||||||
7:18 | — | — | 7:16 | — | — | 7:16 | — | — | 7:15 | — | — | 7:13 | — | — | 7:13 | — | — | 7:11 | — | — | |
— | 6:07 | — | — | 6:08 | — | — | 6:08 | — | — | 6:09 | — | — | 6:09 | — | — | 6:10 | — | — | 6:12 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 15 | 15 | 14 | 15 | 14 | 15 | 15 | 15 | 15 | 15 | 17 | 16 | 15 | 15 | 14 | 15 | 17 | 17 | 19 | 21 | 18 |
Feels °C | 10 | 10 | 11 | 13 | 11 | 13 | 12 | 11 | 10 | 10 | 12 | 12 | 10 | 9 | 9 | 11 | 13 | 12 | 11 | 14 | 14 |
Swell 1 Height (m) Direction Period (s) | — | SW 16 | SW 16 | 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 15 | SW 18 | SW 17 | SW 16 |
— | 4941 | 2538 | 2516 | 2075 | 1932 | 2220 | 2017 | 1832 | 1392 | 1155 | 847 | 668 | 581 | 440 | 643 | 603 | 410 | 595 | 413 | 314 | |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | SW 23 | SW 21 | SW 20 | S 10 | — | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 86 | 159 | 306 | 2 | — | — | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | SSW 24 | — | — | — | — | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 55 | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | SW 17 | SW 16 | SW 16 | — | SW 16 | — | — | — | — | E 4 | E 4 | — | — | — | SE 4 | ENE 3 | SSE 5 | — | N 4 | NNW 4 | NNW 3 |
3791 | 3272 | 65 | — | 61 | — | — | — | — | 9 | 7 | — | — | — | 14 | 2 | 2 | — | 17 | 17 | 4 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 1236 | 1229 | 651 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 361 | 0 | 0 | 0 | 0 | 651 | 564 | 287 |
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.











