
Surf Forecasts:
Cunns surf forecast from 9 Aug 2026:
- Best quality surf: Thursday 13 Aug, 6PM (local time) - 7ft (2.1m), 15s period, SW swell with cross-offshore winds.
- Most powerful swell: Wednesday 12 Aug, 3PM (local time) - 10ft (3.0m), 16s period, SW swell with 5,200 kJ wave energy.
- Next surfable swell (1★+): Thursday 13 Aug, 6PM (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 6PM. The primary swell is predicted to be 2.1m and 15s period with a secondary swell of 0.4m and 15s. 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 0.4m 3s period and expected on Sunday (Aug 16) at 9PM.
| Wave Type | Time (ACST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6PM (Thu 13th Aug) | 7ft (2.1m) 15s |
| Best Surf | 6PM (Thu 13th Aug) | 7ft (2.1m) 15s |
| 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 look at what's on the cards for our stretch of coast over the next couple of weeks.
We've got a bit of a rough start ahead, but it cleans up into some really solid windows, especially for those who can wait it out. The main break in focus is Cunns (a reef setup), and it's exposed to the SW. The water's sitting at 60°F right now, which is about average for this time of year, so nothing wild to report there temperature-wise.
Sunday 9th through Thursday 13th is a write-off for decent surfing. Strong, messy winds and big, unruly swell. The energy is massive – we’re talking a combined swell energy of 2211 on Sunday, then jumping to 3882 on Monday morning, and even hitting 8472 on Wednesday afternoon. But with that much power and near gale-force onshore winds, it’s just blown-out chaos. The swell is pushing 8ft to 10ft with long periods over 15 seconds. That’s a lot of water moving, but without clean wind, it’s no good for a paddle. Honestly, with the wind and the beach/reef setup, it might be more interesting for the kite surfers than us right now. Things start to look promising from Thursday afternoon onwards, but Thursday itself still has a cross-shore chop.
Friday 14th August is where the light turns green. We get clean conditions from the morning with a light cross-offshore breeze. The swell has dropped to a manageable 7ft from the SW with a groundswell period of 17 seconds. The energy is still substantial at 2442, but the wind is light and clean. This is excellent for experienced surfers – Cunns can handle that long-period SW groundswell really well, offering some proper shaped waves.
Saturday 15th August is the real standout of the whole forecast. The morning offers 6ft of SW groundswell with a 16-second period, and the winds are gentle cross-off. In the afternoon it gets even better: 5ft SW with a gentle offshore breeze. The combined energy at 1140 is moderate, not too punchy, but the conditions will be glassy and clean. If you can only pick one session, Saturday afternoon is it. The winds are proper offshore, and the swell is a perfect size for that reef.
Sunday 16th August stays clean with offshore breezes, but the swell drops to 4ft. Still fun, just smaller. The energy dips to 659. Good for a longboard or a smaller craft, but not the stand-out.
Monday 17th and Tuesday 18th see a bit of a lull in size, with 3ft to 4ft of SW swell, but the conditions remain clean, especially on Tuesday afternoon where we get 4ft at an 18-second period with light winds and excellent conditions. The energy kicks back up to 1099, making it a solid smaller day.
Wednesday 19th through Saturday 23rd gets messy again. The winds turn onshore or cross-shore with stronger breezes, and the swell fluctuates. There's a pulse of bigger swell around 10ft on the 23rd, but it’s cross-shore and messy. Not worth the effort.
Monday 24th August finishes the outlook on a high. The morning has 6ft of SW swell with a light offshore breeze and clean conditions. The energy is 1654. But the real cherry on top is Monday afternoon: 8ft of SW swell at 16 seconds, with a gentle cross-offshore wind. The combined energy hits 4505, making it moderate-to-strong, and the conditions are forecast as excellent for experienced surfers. That is a belter of a session to wrap up the 16 days.
So, to sum it up: the early days are a loss. Saturday 15th afternoon is the top pick for clean, fun-sized waves. Monday 24th afternoon is the big-swell standout if you're an experienced surfer looking for some serious power in clean conditions.
Rusty out.
Short Range ForecastModerate rain (total 10mm), heaviest on Tue afternoon. Very mild (max 17°C on Tue morning, min 12°C on Mon night). Winds decreasing (near gales from the WSW on Sun afternoon, light winds from the NW by Mon afternoon). | Days 5-7 Weather SummaryMostly dry. Very mild (max 16°C on Fri afternoon, min 14°C on Wed night). Wind will be generally light. | |||||||||||||||||||
Sun 9 | Monday 10 | Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | ||||||||||||||
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 11 | SW 12 | SW 17 | SW 16 | SW 16 | SW 14 | 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 14 |
Wave Graph | ||||||||||||||||||||
2211 | 2413 | 3882 | 2475 | 1384 | 668 | 3705 | 4892 | 3746 | 5200 | 2203 | 2120 | 1857 | 1568 | 2442 | 2247 | 1675 | 1392 | 1140 | 911 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-on | on | cross-on | cross-on | on | cross-on | cross-on | cross-on | cross | on | cross | cross-off | cross-off | off | off | cross-off | off | off |
High Tide | 1:00AM0.58m | 12:03PM1.28m | 00:48AM0.63m | 12:27PM1.36m | 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 | |||||||
Low Tide | 7:12PM0.14m | 5:06AM0.41m | 7:16PM0.11m | 5:37AM0.27m | 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 | |||||||
— | — | 7:20 | — | — | 7:18 | — | — | 7:18 | — | — | 7:16 | — | — | 7:16 | — | — | 7:15 | — | — | |
6:06 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:08 | — | — | 6:08 | — | — | 6:09 | — | |
mm | 1 | 1 | — | — | — | — | 7 | 1 | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 13 | 13 | 14 | 14 | 13 | 17 | 14 | 13 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 16 | 16 | 15 | 15 | 15 |
Feels °C | 2 | 2 | 8 | 9 | 7 | 8 | 5 | 4 | 9 | 9 | 12 | 13 | 11 | 12 | 13 | 12 | 12 | 11 | 11 | 10 |
Swell 1 Height (m) Direction Period (s) | — | — | — | SW 16 | SW 16 | SW 14 | — | — | — | SW 16 | SW 16 | SW 16 | SW 15 | SW 15 | SW 17 | SW 16 | SW 16 | SW 16 | SW 16 | SW 14 |
— | — | — | 2475 | 1384 | 668 | — | — | — | 5200 | 2203 | 2120 | 1857 | 1568 | 2442 | 2247 | 1675 | 1392 | 1140 | 911 | |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | SW 11 | SW 12 | SW 17 | SW 16 | NNW 4 | WNW 5 | WSW 18 | SW 17 | SW 17 | SW 16 | SW 16 | — | — | — | — | — | — | — | — | — |
2211 | 2413 | 3882 | 69 | 12 | 90 | 3705 | 4892 | 3746 | 3272 | 64 | — | — | — | — | — | — | — | — | — | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 401 | 1052 | 1219 | 1560 | 510 | 1111 | 1227 | 1287 | 1236 | 1219 | 1048 | 203 | 491 | 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.











