Surf Forecasts:
Cunns surf forecast from 25 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: Monday 31 Aug, 12AM (local time) - 6ft (1.8m), 18s period, SW swell with 2,042 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 1.8m 18s and forecast to arrive on Monday (Aug 31) at 12AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 4s period and expected on Saturday (Aug 29) at 9PM.
| 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 (Mon 31st Aug) | 6ft (1.8m) 18s |
Table - best surf conditions forecast for Cunns over the next 16 days.
The Lowdown
Alright mate, let’s break down the next couple of weeks at Cunns.
The good news is there’s swell on the charts the whole way through, but we’ve gotta sort the wheat from the chaff. The opening days are frustrating: a decent 6ft to 6ft SW groundswell on Tuesday the 25th of August, but the wind is all messy cross-shore, so don’t bother paddling out. The pattern stays average with a lot of cross-chop for the next few days.
The first real golden window is Sunday the 30th of August, and it’s the afternoon that’s the one. We get a clean 4ft SW groundswell with a super-long 19-second period (over 15 seconds!), meaning those long, lined-up sets will be marching in. The wind swings offshore from the ESE, so it’ll be glassy and clean. The combined energy is strong at 1183. This is your standout session for the first week. Just know this is an inconsistent reef break, so you might wait a bit between sets, and a Sunday might see a few other folks out. The water temp is 60°, dead average for the time of year, so no need for a thicker suit.
After that, we drop into smaller, cleaner conditions through the start of September, but the wind gets nasty onshore again on the 1st and 2nd.
For the second week, there are two solid, expert-level windows. Thursday the 3rd of September afternoon brings a building 6ft SW groundswell (16 seconds) with clean cross-offshore wind from the SE and a strong energy reading of 1392. That’s a solid, punchy session. Friday the 4th of September morning is another clean call with 5ft SW swell (16 seconds) and light offshore breezes, energy at 1179. Both of these are over the 5ft mark, so they’re for advanced and expert surfers only. Saturday the 5th of September afternoon looks like it gets wrecked by a choppy cross-onshore wind.
Then, looking way ahead, mark Wednesday the 9th of September morning. That’s a big one: 7ft of SW groundswell (18 seconds) with a massive 2354 combined energy reading. The wind is cross-off from the SE, keeping it clean, but that’s serious, long-period power for experts only on a reef.
So, the plan is simple: skip the early week mess, hit Sunday the 30th of August afternoon, then keep an eye on the 3rd and 4th of September. The 9th of September is the big dog, but only if you’ve got the skills.
Rusty.
Short Range ForecastMostly dry. Warm (max 24°C on Thu afternoon, min 11°C on Tue night). Winds increasing (light winds from the ESE on Tue night, fresh winds from the N by Thu morning). | Days 4-6 Weather SummaryMostly dry. Warm (max 22°C on Fri afternoon, min 17°C on Sun morning). Wind will be generally light. | ||||||||||||||||||||
Tuesday 25 | Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | Sunday 30 | Monday 31 | |||||||||||||||
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 15 | SW 14 | SW 14 | SW 13 | SW 12 | SW 14 | SW 14 | SW 19 | SW 17 | SW 16 | SW 16 | SW 14 | SW 14 | SW 13 | SW 13 | SW 19 | SW 19 | SW 18 | SW 16 | SW 16 | SW 15 |
Wave Graph  | |||||||||||||||||||||
 kJ | 1697 | 1155 | 656 | 431 | 260 | 297 | 466 | 614 | 1722 | 1144 | 906 | 536 | 331 | 208 | 160 | 303 | 1183 | 2042 | 1215 | 967 | 640 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross-off | cross | cross-off | cross-off | cross | cross | cross-off | cross | cross | cross-off | cross-off | off | off | cross-off | off | cross-off | cross | cross | cross |
High Tide | 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 | 1:40PM1.24m | 1:55AM1.26m | |||||||
Low Tide | 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 | 7:36AM-0.03m | 7:45PM-0.04m | ||||||||
 | |  | | | | | |  |  | | | | | | | | | | | | |
 | 7:03 | — | — | 7:03 | — | — | 7:01 | — | — | 7:01 | — | — | 6:58 | — | — | 6:58 | — | — | 6:56 | — | — |
 | — | 6:15 | — | — | 6:16 | — | — | 6:16 | — | — | 6:17 | — | — | 6:19 | — | — | 6:19 | — | — | 6:20 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 14 | 14 | 13 | 16 | 19 | 19 | 21 | 24 | 23 | 21 | 22 | 21 | 21 | 22 | 19 | 21 | 22 | 19 | 22 | 24 | 23 |
Feels °C | 10 | 10 | 12 | 13 | 15 | 15 | 14 | 20 | 18 | 17 | 19 | 16 | 16 | 16 | 14 | 17 | 18 | 15 | 18 | 21 | 19 |
Swell 1 Height (m) Direction Period (s) | SW 15 | SW 14 | SW 14 | SW 13 | SW 12 | SW 14 | SW 14 | SW 15 | SW 17 | SW 16 | SW 16 | SW 14 | SW 14 | SW 13 | SW 13 | SW 12 | SW 19 | SW 18 | SW 16 | SW 16 | SW 15 |
| kJ | 1314 | 1155 | 656 | 431 | 260 | 297 | 466 | 543 | 1722 | 1144 | 906 | 536 | 331 | 208 | 158 | 116 | 1183 | 2042 | 1215 | 967 | 640 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | SW 16 | SW 23 | SW 20 | SW 19 | — | — | — | — | SW 23 | SW 20 | SW 21 | SW 19 | — | — | — | — | — |
| kJ | — | — | — | — | 90 | 21 | 198 | 614 | — | — | — | — | 21 | 16 | 160 | 303 | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | SW 24 | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | 22 | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | SW 15 | SW 14 | — | NNE 3 | — | ENE 2 | N 4 | — | — | — | — | ESE 3 | ESE 3 | SE 3 | SE 4 | ESE 4 | SE 5 | — | — | — | N 3 |
| kJ | 1697 | 52 | — | 1 | — | 1 | 14 | — | — | — | — | 4 | 5 | 2 | 12 | 7 | 3 | — | — | — | 3 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 1032 | 552 | 0 | 0 | 0 | 0 | 401 | 0 | 0 | 0 | 0 | 0 | 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.
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