Surf Forecasts:
Cunns surf forecast from 20 Aug 2026:
- Best quality surf: Friday 21 Aug, 12PM (local time) - 5.5ft (1.7m), 16s period, SW swell with cross-offshore winds.
- Most powerful swell: Friday 28 Aug, 12AM (local time) - 8ft (2.5m), 17s period, WSW swell with 3,728 kJ wave energy.
- Next surfable swell (1★+): Friday 21 Aug, 12PM (local time) - 5.5ft (1.7m), 16s 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 Friday (Aug 21) at 12PM. The primary swell is predicted to be 1.7m and 16s period with a secondary swell of 0.4m and 17s. 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 2.5m 17s and forecast to arrive on Friday (Aug 28) 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 0.8m 4s period and expected on Monday (Aug 24) at 9AM.
| Wave Type | Time (ACST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12PM (Fri 21st Aug) | 5.5ft (1.7m) 16s |
| Best Surf | 12PM (Fri 21st Aug) | 5.5ft (1.7m) 16s |
| Most Powerful | 12AM (Fri 28th Aug) | 8ft (2.5m) 17s |
Table - best surf conditions forecast for Cunns over the next 16 days.
The Lowdown
Alright, Rusty here, let's get into it.
Alright, listen up. We've got one spot on the menu for the next couple of weeks, and that's Cunns. It's a reef break, so it's got that proper slabby feel, but it's inconsistent, so you gotta pick your moments. The water's sitting at 59°, which is pretty much bang on average for this time of year, so no surprises there.
The action kicks off on Thursday the 20th, but it's a bit of a write-off. You've got a 4 ft SW swell, but the wind is cross and the combined energy is weak (723). It's a pass.
Friday the 21st is where it starts to get interesting. Morning sees a jump to 5 ft of SW groundswell, with 15-second periods. The wind is cross-off and clean, and the energy is cooking (1498). This is excellent surf for experienced surfers. That holds through the afternoon, with a 6 ft SW swell (1580 energy). This is the real deal.
Saturday the 22nd keeps the run going. Morning light NE breeze, cross-off, and 5 ft SW swell (1302 energy). Clean as a whistle. Saturday afternoon drops a little to 5 ft, but it's still clean. Sunday the 23rd is another standout. The morning is 5 ft with a 17-second period, but Sunday afternoon is the gem: the wind goes glassy, dead calm, with a 5 ft SW swell. That's as good as it gets for a clean session.
Monday the 24th gets smaller, 3 ft, and the energy drops to 408. You can still get a wave, but the magic is fading. Tuesday the 25th is a mess in the morning with 25 km/h SSW wind creating chop, but the afternoon cleans up with a 5 ft SW swell and cross-off wind.
We hit a lull after that. From Wednesday the 26th through to Monday the 31st, it's mostly marginal. The wind is all over the place, and the swell direction wobbles. On the 28th, the swell gets a bit bigger, hitting 8 ft from the WSW on Friday afternoon, but the wind is cross and it's messy. That's big, expert-only territory.
The real standout for the second week is Tuesday, the 1st of September. The morning has a light 5 ft WSW groundswell with a cross-off breeze and clean conditions. But the afternoon is a proper banger: 4 ft SW swell, but the period jumps to 16 seconds and the energy rockets to 1962. The wind is a clean cross-off. That's a long-period groundswell, perfect for a reef like Cunns, giving you those long, drawn-out lines.
After that, it gets ugly again. Wednesday the 2nd and Thursday the 3rd are blown out by strong onshore winds, and the poor conditions continue. Friday the 4th is a bit better with a cross-shore, but it's still only marginal.
So, the best of the best? It's a tie between Friday the 21st and Sunday the 23rd. Friday for the punchy, consistent SW groundswell, and Sunday for that glassy, dreamy afternoon session. The 1st of September is a promising long-range call, but don't hold your breath.
Rusty out.
Short Range ForecastMostly dry. Warm (max 21°C on Sun afternoon, min 12°C on Fri morning). Wind will be generally light. | Days 5-7 Weather SummaryHeavy rain (total 41mm), heaviest during Mon morning. Very mild (max 19°C on Sun night, min 10°C on Wed morning). Winds decreasing (strong winds from the S on Mon afternoon, calm by Tue night). | ||||||||||||||||||
Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | ||||||||||||||
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 15 | SW 16 | SW 16 | SW 15 | SW 15 | SW 15 | SW 17 | SW 16 | SW 15 | SW 14 | SW 14 | SW 16 | SW 16 | SW 15 | SW 14 | SW 13 | SW 13 | SW 16 |
Wave Graph | |||||||||||||||||||
1135 | 1048 | 1511 | 1402 | 1216 | 936 | 924 | 1388 | 886 | 550 | 341 | 277 | 966 | 1041 | 1471 | 943 | 545 | 405 | 153 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross-off | cross-off | cross | cross-off | cross-off | cross-off | cross | cross-off | off | cross-off | cross-off | cross | cross-off | cross-off | cross-on | glassy | cross |
High Tide | 3:19AM0.92m | 1:48PM0.84m | 3:31AM0.80m | 12:48PM0.83m | 2:55AM0.66m | 11:50AM0.92m | 1:02AM0.62m | 11:40AM1.06m | 00:18AM0.68m | 11:50AM1.19m | 00:13AM0.78m | 12:06PM1.30m | 00:22AM0.89m | ||||||
Low Tide | 8:44AM0.56m | 8:33PM0.21m | 7:56AM0.66m | 8:02PM0.28m | 5:37AM0.64m | 7:09PM0.28m | 5:03AM0.50m | 6:40PM0.23m | 5:15AM0.35m | 6:35PM0.15m | 5:35AM0.21m | 6:40PM0.08m | |||||||
— | 7:09 | — | — | 7:07 | — | — | 7:05 | — | — | 7:05 | — | — | 7:03 | — | — | 7:03 | — | — | |
6:13 | — | 6:14 | — | — | 6:14 | — | — | 6:15 | — | — | 6:15 | — | — | 6:15 | — | — | 6:16 | — | |
mm | — | — | — | — | — | — | — | — | — | 8 | 23 | 10 | — | — | — | — | — | — | — |
Temp °C | 14 | 12 | 13 | 14 | 15 | 16 | 15 | 19 | 21 | 19 | 12 | 13 | 14 | 14 | 14 | 12 | 13 | 16 | 16 |
Feels °C | 12 | 9 | 10 | 11 | 14 | 12 | 11 | 15 | 18 | 14 | 7 | 5 | 8 | 7 | 9 | 8 | 10 | 13 | 12 |
Swell 1 Height (m) Direction Period (s) | SW 15 | SW 15 | SW 16 | SW 16 | SW 15 | SW 15 | SW 15 | SW 17 | SW 16 | SW 15 | SW 14 | SW 14 | — | SW 16 | SW 15 | SW 14 | SW 13 | SW 13 | SW 12 |
1135 | 1048 | 1511 | 1402 | 1216 | 936 | 924 | 1388 | 886 | 550 | 341 | 277 | — | 1041 | 1471 | 943 | 545 | 405 | 144 | |
Swell 2 Height (m) Direction Period (s) | SW 19 | SW 18 | — | — | SW 23 | SW 21 | SW 19 | — | — | — | SW 20 | SW 18 | — | — | — | — | SW 18 | SW 17 | SW 16 |
303 | 375 | — | — | 86 | 285 | 369 | — | — | — | 15 | 51 | — | — | — | — | 13 | 45 | 153 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | NNW 3 | WSW 24 |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 56 | |
Wind waves Height (m) Direction Period (s) | SW 16 | SW 17 | SW 16 | — | — | — | — | — | — | — | ESE 4 | SE 4 | SW 16 | SSW 7 | SW 15 | — | N 3 | — | NNE 3 |
61 | 75 | 69 | — | — | — | — | — | — | — | 16 | 15 | 966 | 154 | 58 | — | 1 | — | 3 | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 1045 | 552 | 0 | 0 | 0 | 0 | 491 | 0 | 0 | 0 | 0 | 0 | 0 | 491 | 491 | 491 | 0 | 0 | 0 |
Best forecast wave conditions in Nullarbor | |||||||||||||||||||
Best forecast wave conditions in Australia | |||||||||||||||||||
Header Global | |||||||||||||||||||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)
Wind Speed (km/h)
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.











