Surf Forecasts:
Cunns surf forecast from 25 Aug 2026:
- Best quality surf: Sunday 30 Aug, 9PM (local time) - 4.5ft (1.3m), 17s period, SW swell with offshore winds.
- Most powerful swell: Monday 31 Aug, 3AM (local time) - 5ft (1.6m), 19s period, SW swell with 1,798 kJ wave energy.
- Next surfable swell (1★+): Wednesday 26 Aug, 6AM (local time) - 4ft (1.2m), 13s 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 Wednesday (Aug 26) at 6AM. The primary swell is predicted to be 1.2m and 13s period with a secondary swell of 0.1m and 18s. 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 1.6m 19s and forecast to arrive on Monday (Aug 31) at 3AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.8m 4s period and expected on Saturday (Aug 29) at 9PM.
| Wave Type | Time (ACST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6AM (Wed 26th Aug) | 4ft (1.2m) 13s |
| Best Surf | 9PM (Sun 30th Aug) | 4.5ft (1.3m) 17s |
| Most Powerful | 3AM (Mon 31st Aug) | 5ft (1.6m) 19s |
Table - best surf conditions forecast for Cunns over the next 16 days.
The Lowdown
Alright, I’m Rusty, and here’s the lowdown for Cunns.
First few days are a bust. Wednesday the 26th and Thursday the 27th are blown out with cross-shore wind and lumpy water. No point even looking.
Friday the 28th gets a little better. Morning is still average with a 5ft SW swell and cross-shore breeze, but the afternoon turns glassy—dead calm—with 5ft SW swell. Clean, smooth, and worth a paddle. Wave energy is moderate (989).
Saturday the 29th and Sunday the 30th keep the clean vibes. Saturday afternoon has offshore wind from the ESE with 3ft SW swell. Sunday afternoon is the real peach: 4ft SW swell, 19-second period, and a gentle offshore. That’s long-period groundswell, and on a reef break, it’ll set up nicely. Energy is moderate (887). Best session of the first week.
Monday the 31st brings bigger waves—5ft and 5ft SW—but cross-shore wind messes up the quality. Still surfable for the experienced.
Then it gets ugly from Tuesday the 1st of September through Thursday the 3rd. Strong cross-onshore winds and messy seas. The swell is there, but it’s not clean. The energy gets strong (1566 on Tuesday arvo), but it’s more for the kite crew.
The good stuff returns in the second week. Friday the 4th of September morning: 5ft SW swell, 15-second period, clean cross-offshore breeze. Strong energy (1200). Excellent for experienced surfers. Saturday the 5th morning is almost a carbon copy—5ft SW, clean, light winds. Two killer mornings in a row.
Tuesday the 8th morning has 5ft SW swell, 17-second period, clean. Wednesday the 9th morning is a standout: 5ft SW, 17-second period, clean, with energy at 1630. That’s strong, powerful, and consistent. The afternoon jumps to 7ft SSW with an 18-second period and energy at 2559—very strong, for experts only.
Thursday the 10th morning finishes strong: 5ft SW, 16-second period, clean. Energy is strong (1298).
The two best windows? Sunday the 30th of August afternoon for the glassy, offshore perfection, and Wednesday the 9th of September morning for the raw, clean power. Don’t sleep on those.
Cunns is an inconsistent reef, so when it fires, you go. Expect some company—crowds are possible. Water temp is about normal for this time of year.
That’s all from Rusty. Catch you in the water.
Short Range ForecastMostly dry. Warm (max 24°C on Thu afternoon, min 11°C on Tue night). Winds decreasing (fresh winds from the N on Thu morning, calm by Fri afternoon). | Days 5-7 Weather SummaryMostly dry. Warm (max 25°C on Mon afternoon, min 16°C on Sun morning). Wind will be generally light. | ||||||||||||||||||
Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | Sunday 30 | Monday 31 | ||||||||||||||
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 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 17 | SW 17 | SW 16 |
Wave Graph  | |||||||||||||||||||
 kJ | 725 | 431 | 260 | 297 | 466 | 614 | 1597 | 1144 | 989 | 536 | 331 | 208 | 160 | 236 | 887 | 1215 | 1437 | 1252 | 813 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross | cross-off | cross-off | cross | cross | cross-off | cross | glassy | off | cross-off | off | off | cross-off | off | cross-off | cross | cross | cross |
High Tide | 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 | 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 | — | — | 7:01 | — | — | 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 | 13 | 15 | 19 | 19 | 22 | 24 | 23 | 21 | 22 | 21 | 21 | 22 | 19 | 21 | 22 | 19 | 22 | 25 | 24 |
Feels °C | 11 | 12 | 15 | 15 | 16 | 19 | 18 | 18 | 20 | 16 | 16 | 17 | 14 | 17 | 18 | 15 | 17 | 21 | 19 |
Swell 1 Height (m) Direction Period (s) | 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 17 | SW 17 | SW 16 |
| kJ | 725 | 431 | 260 | 297 | 466 | 543 | 1597 | 1144 | 989 | 536 | 331 | 208 | 158 | 116 | 887 | 1215 | 1437 | 1252 | 813 |
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 | 236 | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | SW 24 | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | 22 | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | NE 3 | — | NE 3 | N 4 | — | — | — | — | ESE 3 | ESE 3 | SE 3 | SE 4 | ESE 5 | SE 3 | SE 4 | — | — | N 3 |
| kJ | — | 2 | — | 2 | 14 | — | — | — | — | 5 | 1 | 3 | 21 | 12 | 5 | 8 | — | — | 3 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 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.
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.
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