Surf Forecasts:
Cunns surf forecast from 24 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, 12AM (local time) - 7ft (2.2m), 17s period, WSW swell with 2,766 kJ wave energy.
- Next surfable swell (1★+): Tuesday 25 Aug, 6PM (local time) - 5ft (1.6m), 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 Tuesday (Aug 25) at 6PM. The primary swell is predicted to be 1.6m and 14s period with a secondary swell of 0.4m and 14s. 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 2.2m 17s and forecast to arrive on Friday (Aug 28) at 12AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 3s period and expected on Sunday (Aug 30) at 12AM.
| Wave Type | Time (ACST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6PM (Tue 25th Aug) | 5ft (1.6m) 14s |
| Best Surf | 6PM (Tue 25th Aug) | 5ft (1.6m) 14s |
| Most Powerful | 12AM (Fri 28th Aug) | 7ft (2.2m) 17s |
Table - best surf conditions forecast for Cunns over the next 16 days.
The Lowdown
Alright, this is Rusty, and I’m lookin’ straight at the charts for Cunns. Let’s get into it.
The next couple of weeks are a bit of a mixed bag, but there’s definitely some light at the end of the tunnel. We’ve got a solid run of cleaner conditions shaping up for the end of this month and into early September, but you’ll have to sit through some messy wind the first few days.
So, Cunns (a reef break) is our only game in town for this forecast. It’s an advanced wave, so this isn’t one for the groms or weekend warriors. It’s also inconsistent, so when it’s on, you need to be on it. The water temp is sittin’ at 60°F, which is basically normal for this time of year – no wild anomalies here.
Right now, on Monday the 24th, forget it. We’ve got rain showers and a strong WSW breeze at 16 mph kickin’ up a choppy, cross-onshore mess on a 4ft SW swell. The combined energy is weak (453), and it’s just poor.
Through Tuesday the 25th and Wednesday the 26th, it’s still a struggle. The swell bumps up to 6ft on Tuesday morning with that clean SW direction, but it’s still cross-shore and the energy is moderate (1697). The scores tell me it’s marginal at best, and those cross-winds are gonna keep it lumpy. Not worth paddling out for the average surfer.
Thursday the 27th and Friday the 28th are more of the same – fresh winds, lumpy cross-chop, and the swell is a bit jumbled. The period climbs to 16-19 seconds on Thursday afternoon, which is long-period groundswell, but with that much cross-wind, it’s just gonna be a bumpy ride.
Alright, now we’re talkin’. Saturday the 29th is the first real standout. The morning will be clean with a light NE breeze that’s cross-offshore, and a 4ft swell from the WSW. The energy is still moderate (627), but the conditions will be excellent. That’s the kind of window you want if you’re an advanced surfer looking for some clean reef lines.
Sunday the 30th stays clean in the morning with a light ESE offshore wind, but the swell drops to just 2ft. It’s a 19-second period groundswell, so there will be some nice, orderly sets, but the size is weak (393). It’s good for a longboard or a quiet, small-wave session.
Now, the real highlight of the entire outlook lands on Monday the 31st of August and carries into the afternoon. Monday morning sees the swell jump to 6ft from the SW with a 18-second period, and light NE winds (9 mph) making it clean. The energy jumps to a strong 2053. This is where it gets good. The standout, though, is Monday afternoon: 6ft SW swell, 17-second period, light SE breeze at 6 mph – it’s described as “excellent surf conditions for experienced surfers.” That’s your golden ticket. Clean, long-period groundswell, solid size, and empty peaks.
We get a bit of a lull from Tuesday the 1st of September through the middle of the week, with onshore winds and poor conditions. It’s not worth it.
Then, on Thursday the 3rd of September afternoon, another window opens up. A 6ft SW swell with a 13-second period, and a light S breeze (9 mph) puts it back in the “excellent” zone. That’ll be another clean session for the crew who can handle it.
Friday the 4th of September keeps the goodness rolling – 4ft to 4ft SW swell, light SSE winds, and clean conditions in the morning and afternoon. Very good.
After that, Saturday the 5th and Sunday the 6th look like a write-off again with fresh, onshore winds ruining the shape. And then we have a final interesting call for Monday the 8th of September: a big 8ft SW swell with a very long 18-second period and moderate cross-onshore wind. The energy is huge (4348), but with that onshore push, it’s going to be challenging and only for the experts. The period is so long, it’ll be breaking a bit straight on this reef setup, but the power will be undeniable.
So, to sum it up: the best windows are Saturday the 29th of August morning for a clean, fun size session, and Monday the 31st of August afternoon for the real standout – that’s the one with excellent conditions and strong, long-period groundswell for experienced surfers. Get on it.
Rusty.
Short Range ForecastLight rain (total 4mm), mostly falling on Mon morning. Warm (max 20°C on Wed afternoon, min 11°C on Tue night). Winds decreasing (fresh winds from the SW on Mon afternoon, light winds from the SE by Tue night). | Days 4-6 Weather SummaryModerate rain (total 18mm), heaviest on Fri morning. Warm (max 25°C on Thu afternoon, min 14°C on Fri morning). Winds decreasing (fresh winds from the N on Thu morning, calm by Sat night). | ||||||||||||||||||||
Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | Sunday 30 | |||||||||||||||
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 14 | SW 14 | SW 13 | SW 15 | SW 14 | SW 14 | SW 13 | SW 13 | SW 14 | SW 14 | SW 19 | WSW 17 | SW 16 | SW 16 | WSW 14 | WSW 14 | SW 13 | SW 13 | SW 19 | SW 19 | SW 18 |
Wave Graph | |||||||||||||||||||||
453 | 1218 | 905 | 1697 | 1155 | 656 | 488 | 265 | 297 | 336 | 614 | 2766 | 1129 | 1224 | 934 | 607 | 501 | 230 | 236 | 499 | 1946 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross | cross | cross | cross | cross-off | cross | cross | cross | cross | cross | cross-on | cross | cross-on | cross-on | cross-off | cross-off | cross | off | cross-off | cross-off |
High Tide | 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 | 1:22PM1.34m | 1:34AM1.23m | |||||||
Low Tide | 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 | 7:10AM-0.06m | 7:32PM-0.05m | ||||||||
7:05 | — | — | 7:03 | — | — | 7:03 | — | — | 7:01 | — | — | 7:01 | — | — | 6:58 | — | — | 6:58 | — | — | |
— | 6:15 | — | — | 6:15 | — | — | 6:16 | — | — | 6:16 | — | — | 6:17 | — | — | 6:19 | — | — | 6:19 | — | |
mm | 2 | — | 2 | — | — | — | — | — | — | — | — | 4 | 12 | 2 | — | — | — | — | — | — | — |
Temp °C | 15 | 15 | 14 | 13 | 13 | 12 | 16 | 20 | 20 | 22 | 25 | 23 | 15 | 18 | 17 | 18 | 19 | 19 | 20 | 22 | 20 |
Feels °C | 9 | 8 | 9 | 8 | 9 | 10 | 13 | 16 | 15 | 13 | 18 | 17 | 10 | 14 | 14 | 16 | 16 | 16 | 18 | 18 | 15 |
Swell 1 Height (m) Direction Period (s) | ESE 4 | — | — | — | SW 14 | SW 14 | SW 13 | SW 13 | SW 14 | SW 14 | SW 15 | SW 17 | SW 16 | SW 16 | WSW 14 | WSW 14 | SW 13 | SW 13 | SW 12 | SW 19 | SW 18 |
3 | — | — | — | 1155 | 656 | 488 | 265 | 297 | 336 | 492 | 2471 | 1129 | 1224 | 934 | 607 | 501 | 230 | 144 | 499 | 1946 | |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | SSW 7 | — | — | SW 16 | SW 23 | SW 20 | SW 19 | — | W 4 | — | — | SW 23 | SW 20 | SW 21 | SW 19 | SW 12 | SSW 21 |
— | — | — | — | 160 | — | — | 90 | 21 | 256 | 614 | — | 9 | — | — | 20 | 15 | 71 | 236 | 140 | 42 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | SW 23 | — | W 26 | SW 24 | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 21 | — | 13 | 87 | — | |
Wind waves Height (m) Direction Period (s) | SW 14 | SW 14 | SW 13 | SW 15 | SW 14 | — | — | — | NE 2 | N 4 | NNW 4 | WSW 17 | W 4 | SW 16 | NE 3 | — | — | SSE 3 | SE 4 | SSW 19 | ESE 2 |
453 | 1218 | 905 | 1697 | 52 | — | — | — | 2 | 27 | 13 | 2766 | 8 | 88 | 2 | — | — | 7 | 7 | 140 | 1 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 287 | 401 | 668 | 1061 | 552 | 0 | 0 | 0 | 0 | 564 | 178 | 0 | 564 | 401 | 0 | 0 | 0 | 0 | 0 | 132 | 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.











