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: Thursday 13 Aug, 3AM (local time) - 7.5ft (2.3m), 16s period, SW swell with 2,702 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 with a secondary swell of 0.4m and 16s. 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 Thursday (Aug 13) at 3AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 3s period and expected on Sunday (Aug 16) at 6PM.
| 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 | 3AM (Thu 13th Aug) | 7.5ft (2.3m) 16s |
Table - best surf conditions forecast for Cunns over the next 16 days.
The Lowdown
Alright, this is Rusty, coming to you from the wire. We’ve got Cunns on the radar, and it’s shaping up to be a solid run for the crew who know what they’re doing. This is a reef break that fires on a SW swell, and the water temp is sitting right where it should be for this time of year—nothing unusual there.
The window kicks off on Thursday the 13th of August with a solid pulse. Thursday morning, we’re looking at 8ft of SW groundswell, with a 16-second period. That’s long-period energy, proper groundswell, and with a light 10 km/h southerly breeze blowing cross-off, the conditions are clean. The combined energy is up there at 2516, which is strong. This is expert territory at that size, but for the right surfer, it’s a standout. The crowds are sometimes an issue here, but with that consistency being inconsistent, it might keep the numbers down.
Thursday afternoon sees the swell dropping to 7ft, still with a 15-second period, but the wind swings to a cross-shore, making it less perfect. The energy dips a bit to 2136, but it’s still a good wave.
Friday the 14th is another cracker. Morning has a 7ft SW swell, 16-second period, and a light 5 km/h offshore from the SE. That’s glassy, clean, and the energy is at 2193. Afternoon holds the same size, with a 15 km/h SSE cross-off—still clean. This is the best of the run, with the offshore wind making it a no-brainer for the experienced crew.
Saturday the 15th keeps the fun rolling. Morning is 6ft from the SW, 16 seconds, with a 15 km/h offshore from the east. The energy is 1513, and it’s clean. Afternoon drops to 5ft, 16 seconds, and the offshore holds. Perfect for a solid session.
Sunday the 16th, the swell starts to fade. 4ft in the morning, 14 seconds, with a cross-off wind. The energy is down to 746, and it’s getting marginal. Afternoon is 4ft, with a 20 km/h offshore from the ESE—still clean but small.
Monday the 17th is similar, with 4ft of SW swell, 16-second period, and cross-off winds. The energy is around 729 to 793. It’s small, but it’s clean.
Then we hit a rough patch. From Tuesday the 18th through to Sunday the 23rd, the wind goes against us. Strong onshore and cross-shore winds, poor conditions, choppy mess. The first part of that stint is small, but the last few days see a spike in swell size. Sunday the 23rd afternoon, we’ve got 7ft of SW swell, 19-second period, with a strong 30 km/h cross-onshore wind. The energy is huge at 3107, but it’s a washing machine. That’s more of a kite-surfing setup than a paddle session.
Monday the 24th and Tuesday the 25th are still onshore, but the swell is solid. By Tuesday the 25th afternoon, the wind finally swings back to a light cross-off from the south, and the swell is 5ft from the SW, 13-second period. The energy is 970, and it’s clean again. That’s a good sign.
Wednesday the 26th is small, but clean. Thursday the 27th morning is the real standout of the second week. We’ve got 4ft of SW swell, 17-second period, with a 15 km/h cross-off from the NE. The energy is 1271, and it’s clean. The afternoon gets a bit weird with a 10ft, 10-second WSW swell, which is short-period and a bit unruly, but the morning window is excellent.
Friday the 28th sees the wind turning cross-shore again, with a 7ft WSW swell, 14 seconds. It’s marginal.
So, the bottom line: the first 24 hours on Thursday the 13th, and all of Friday the 14th into Saturday the 15th are your best bets. That’s the standout period. The second week has a lonely gem on the morning of Thursday the 27th, but it’s a long-range call. Keep an eye on it.
Rusty.
Short Range ForecastMostly dry. Very mild (max 17°C on Sat afternoon, min 14°C on Wed night). Wind will be generally light. | Days 5-7 Weather SummarySome drizzle, heaviest during Tue afternoon. Very mild (max 18°C on Tue morning, min 12°C on Mon morning). Winds increasing (light winds from the E on Sat night, fresh winds from the NNE by Tue morning). | ||||||||||||||||||
Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | Monday 17 | Tuesday 18 | ||||||||||||||
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 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 15 | SW 19 | SW 18 | SW 17 | SW 16 |
Wave Graph | |||||||||||||||||||
2538 | 2516 | 2075 | 2075 | 2193 | 2166 | 1832 | 1513 | 1155 | 836 | 746 | 590 | 434 | 643 | 595 | 515 | 679 | 482 | 314 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-off | cross | cross-off | off | cross-off | off | off | off | off | cross-off | off | off | cross-off | cross-off | cross-off | cross | cross | cross |
High Tide | 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 | 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 | |||||||
— | 7:16 | — | — | 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 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | — |
Temp °C | 15 | 15 | 15 | 15 | 15 | 14 | 15 | 16 | 17 | 16 | 15 | 17 | 15 | 16 | 17 | 16 | 18 | 16 | 15 |
Feels °C | 12 | 13 | 13 | 12 | 13 | 11 | 11 | 12 | 13 | 11 | 10 | 12 | 10 | 11 | 12 | 12 | 11 | 11 | 12 |
Swell 1 Height (m) Direction Period (s) | 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 15 | SW 14 | SW 18 | SW 17 | SW 16 |
2538 | 2516 | 2075 | 2075 | 2193 | 2166 | 1832 | 1513 | 1155 | 836 | 746 | 590 | 434 | 643 | 595 | 346 | 679 | 482 | 314 | |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | SW 23 | SW 21 | SW 19 | — | S 10 | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | 86 | 160 | 515 | — | 2 | — | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | S 26 | — | SSE 10 | S 10 | — | — | — |
— | — | — | — | — | — | — | — | — | — | — | — | 13 | — | 38 | 17 | — | — | — | |
Wind waves Height (m) Direction Period (s) | SW 16 | — | SW 16 | — | — | — | — | — | E 3 | — | — | — | SE 4 | — | — | ENE 3 | N 4 | N 3 | N 3 |
65 | — | 61 | — | — | — | — | — | 3 | — | — | — | 14 | — | — | 3 | 18 | 3 | 2 | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 648 | 0 | 648 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 651 | 0 | 287 |
Best forecast wave conditions in Nullarbor | |||||||||||||||||||
Best forecast wave conditions in Australia | |||||||||||||||||||
Header Global | |||||||||||||||||||
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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.











