
Surf Forecasts:
Cunns surf forecast from 11 Aug 2026:
- Best quality surf: Thursday 13 Aug, 3PM (local time) - 7ft (2.1m), 15s period, SW swell with cross-offshore winds.
- Most powerful swell: Wednesday 12 Aug, 12PM (local time) - 10ft (3.0m), 16s period, SW swell with 5,472 kJ wave energy.
- Next surfable swell (1★+): Thursday 13 Aug, 3PM (local time) - 7ft (2.1m), 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 Thursday (Aug 13) at 3PM. The primary swell is predicted to be 2.1m and 15s 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 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 0.5m 3s period and expected on Saturday (Aug 15) at 3AM.
| Wave Type | Time (ACST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3PM (Thu 13th Aug) | 7ft (2.1m) 15s |
| Best Surf | 3PM (Thu 13th Aug) | 7ft (2.1m) 15s |
| Most Powerful | 12PM (Wed 12th Aug) | 10ft (3.0m) 16s |
Table - best surf conditions forecast for Cunns over the next 16 days.
The Lowdown
Alright, this is Rusty, and I’m looking at the next few weeks for our little slice of the coast here. Right now, the ocean is straight-up angry and not for the faint of heart. We’ve got a massive, raw southwest groundswell hammering the coast, with the combined wave energy registering a whopping 4695 – that’s serious, heavy water. The water temp is sitting at a fairly average 59°F, nothing weird for August.
The problem? That wind is howling from the west at a solid 28 mph, and that’s going to make for a total mess. This is one for the experts only, if anyone, and honestly, with poor surf conditions flagged, it’s a hard pass for the next couple of days.
Looking at the week ahead, the swell stays chunky, but the wind is the real story. Cunns (a reef break) is set to be the spot to watch. Thursday afternoon the wind turns lighter and cross-off, and we’ll see clean lines. Friday morning the wind goes offshore with the east breeze, and the swell is still a proper 7ft, coming in from the southwest. The period is a long 17 seconds, so you’re getting proper groundswell power. It’s still big at 7ft to 8ft for the mornings, so this is definitely advanced territory, but the quality is there. The wave energy is still very strong, hitting 1932 to 2442.
The standout window is really the weekend. From Saturday morning through Sunday afternoon, we see the swell start to drop into the 4ft to 6ft range, but that offshore wind from the ESE holds true. That sweet 4ft-5ft swell, with period around 14-16 seconds, and offshore wind, that’s the kind of clean surf that makes you call in sick. The wave energy is moderate but solid, in the 513 to 1664 range. It’s glassing up nicely.
The following week (starting Monday, August 17) the swell gets smaller, dropping under 3ft. It turns small and weak until the 21st. Mark your calendar for Friday, August 21, because that afternoon looks like a genuine glass-off. Clean lines from the southwest at 5ft, and the wind goes completely glassy from the ESE – that’s the jackpot. The wave energy is a healthy 1019. This might be the best session of the whole outlook, but it’s a week and a half out, so keep an eye on it.
After that, a new pulse shows up around the 23rd, but it comes with strong cross-onshore winds, and it turns messy. The very end of the window, around Wednesday the 26th, shows another solid 8ft groundswell, but the wind is on it and it’s only marginal. There are good days in here, but you gotta be picky.
Rusty
Short Range ForecastLight rain (total 5mm), mostly falling on Tue night. Very mild (max 16°C on Thu night, min 12°C on Tue afternoon). Winds decreasing (strong winds from the W on Tue afternoon, light winds from the SE by Thu night). | Days 5-7 Weather SummaryMostly dry. Very mild (max 17°C on Sun morning, min 13°C on Fri night). Wind will be generally light. | |||||||||||||||||||
Tue 11 | Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | Monday 17 | ||||||||||||||
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) | WSW 18 | SW 17 | SW 17 | SW 16 | SW 16 | SW 16 | SW 15 | SW 15 | SW 17 | SW 16 | SW 16 | SW 16 | SW 16 | SW 15 | SW 14 | SW 14 | SW 14 | SW 16 | SW 16 | SW 15 |
Wave Graph | ||||||||||||||||||||
2897 | 4234 | 3791 | 3096 | 2538 | 2354 | 1932 | 1882 | 2442 | 2166 | 1832 | 1664 | 1281 | 859 | 659 | 513 | 428 | 306 | 546 | 472 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross-on | cross-on | cross-on | cross | on | cross-off | cross-off | off | cross-off | off | off | off | cross-off | cross-off | off | cross-off | cross-off | off | cross-off |
High Tide | 00:49AM0.71m | 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 | |||||||
Low Tide | 7:23PM0.11m | 6:04AM0.16m | 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 | |||||||
— | — | 7:18 | — | — | 7:16 | — | — | 7:16 | — | — | 7:15 | — | — | 7:13 | — | — | 7:13 | — | — | |
6:07 | — | — | 6:07 | — | — | 6:08 | — | — | 6:08 | — | — | 6:09 | — | — | 6:09 | — | — | 6:10 | — | |
mm | 2 | 3 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 15 | 13 | 14 | 15 | 14 | 15 | 15 | 16 | 15 | 15 | 16 | 14 | 16 | 16 | 17 | 17 | 16 | 16 | 17 | 15 |
Feels °C | 6 | 4 | 8 | 10 | 11 | 13 | 13 | 13 | 12 | 10 | 10 | 10 | 11 | 10 | 13 | 12 | 11 | 11 | 12 | 10 |
Swell 1 Height (m) Direction Period (s) | SW 18 | — | — | — | SW 16 | SW 16 | SW 15 | SW 15 | SW 17 | SW 16 | SW 16 | SW 16 | SW 16 | SW 15 | SW 14 | SW 14 | SW 14 | SW 13 | SW 16 | SW 15 |
1798 | — | — | — | 2538 | 2354 | 1932 | 1882 | 2442 | 2166 | 1832 | 1664 | 1281 | 859 | 659 | 513 | 428 | 205 | 546 | 472 | |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | SW 16 | SW 21 | SW 20 |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 306 | 160 | 373 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | SSW 24 | — | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 54 | — | — | |
Wind waves Height (m) Direction Period (s) | WSW 18 | SW 17 | SW 17 | SW 16 | SW 16 | SW 16 | — | — | — | — | — | — | — | E 3 | ENE 3 | SE 3 | E 3 | ENE 3 | — | E 3 |
2897 | 4234 | 3791 | 3096 | 65 | 64 | — | — | — | — | — | — | — | 5 | 2 | 2 | 3 | 1 | — | 3 | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 1045 | 1045 | 1236 | 1229 | 648 | 648 | 0 | 0 | 0 | 153 | 153 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 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.











