Surf Forecasts:
Cunns surf forecast from 21 Aug 2026:
- Best quality surf: Friday 21 Aug, 3PM (local time) - 5.5ft (1.7m), 16s period, SW swell with cross-offshore winds.
- Most powerful swell: Friday 28 Aug, 3AM (local time) - 7.5ft (2.3m), 17s period, SW swell with 2,970 kJ wave energy.
- Next surfable swell (1★+): Friday 21 Aug, 3PM (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 3PM. The primary swell is predicted to be 1.7m and 16s 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 2.3m 17s and forecast to arrive on Friday (Aug 28) at 3AM. Winds are predicted to be cross-shore 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 23) at 9AM.
| Wave Type | Time (ACST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3PM (Fri 21st Aug) | 5.5ft (1.7m) 16s |
| Best Surf | 3PM (Fri 21st Aug) | 5.5ft (1.7m) 16s |
| Most Powerful | 3AM (Fri 28th Aug) | 7.5ft (2.3m) 17s |
Table - best surf conditions forecast for Cunns over the next 16 days.
The Lowdown
G’day, I’m Rusty, and I’ve been watchin’ this stretch of coast like a hawk. We’ve got a single spot on the radar here, and it’s a bit of a specialty wave. Let’s break it down.
First up, the standout window is the opening weekend. We’re talkin’ Cunns, a reef setup that’s made for the experienced crew – it’s an advanced wave and it’s inconsistent, so when it’s on, it’s a treat. The water’s sittin’ at 59°, which is pretty much what you’d expect for this time of year, no surprises there.
The action kicks off on Friday morning, August 21st. We’ve got a solid 5ft SW groundswell, with a long 15-second period, and the combined energy is pumpin’ at 1399. That’s a moderate-strong energy level, which translates to a heap of push. The wind’s a gentle S’ly cross-off, keepin’ the face clean. This is prime for experienced surfers only – the power’s there, and the reef needs respect. The swell’s comin’ from the SW, which is exactly what this break likes to see. Friday afternoon holds similar energy, with the swell bumpin’ to 6ft and the period stretchin’ to 16 seconds – energy up to 1606. It’s still clean, still cross-off. This is the best of the lot.
Saturday morning, August 22nd, is more of the same goodness. The swell’s 5ft from the SW, 15-second period, 1302 energy, and the wind swings to a light ESE offshore. That’s glassy, clean conditions. Saturday afternoon sees the swell ease a touch to 5ft, with a cross-off breeze, but it’s still a quality wave for the advanced crew.
Sunday morning, August 23rd, is where it starts to fray. The swell’s still 5ft, with a very long 17-second period, energy at 1388, but the wind’s a moderate NNE cross-off. It’s still rideable, but the quality drops. By Sunday afternoon, the swell drops to 5ft, period 16 seconds, energy 979, and the wind goes cross-shore, bringin’ a bit of chop. The magic’s wearin’ off.
From Monday, August 24th, through to the end of the first week, it’s a write-off. Strong winds, rain, messy cross-shore winds, and choppy conditions. The swell sticks around, but the wind ruins it. On Tuesday, August 25th, we see a bigger 6ft SW swell, but it’s accompanied by a fresh cross-shore wind that’s lumpy as hell. Not worth paddlin’ out for a clean wave.
The next flicker of hope comes on Wednesday afternoon, August 26th. The swell’s dropped to 3ft, 13-second period, energy 470, but the wind goes light offshore from the E. That’s clean, but it’s small. Not a standout, but a possible sneaky session for the patient.
Thursday, August 27th, is a no-go – strong winds, lumpy, and the swell’s all over the place. The period jumps to 20 seconds on Thursday morning, but with a fresh cross-shore blowin’, it’s just messy.
The week of August 28th to September 1st is a write-off for paddle surfing. The swell gets big – 7ft to 10ft – but the wind is howlin’ from the WSW at near gale force. That’s cross-onshore and blown out. This setup is more interesting for kite surfing than paddle surfing, honestly. The energy’s through the roof, with values up to 4508, but it’s not for a surfer on a shortboard.
Things improve a bit on Monday, August 31st. The swell settles to 4ft from the SW, with a 15-second period, energy 838, and a light S’ly cross-off wind. That’s clean again, and the conditions are very good. It’s a solid option for the experienced crew, but it’s not as powerful as that first weekend.
The rest of the run into September is a mixed bag. There’s occasional clean windows, like Wednesday afternoon, September 2nd, with a 3ft swell and light onshore wind, but it’s small. The wind tends to be cross-onshore or onshore, keepin’ the quality marginal. The swell direction stays mostly SW, which is what this reef wants, but the wind is the enemy.
So, the clear standout is Friday and Saturday, August 21st and 22nd. That’s the pick of the 16-day window. Clean, powerful SW groundswell, with the right wind, and the energy is moderate-strong. Get it while it’s good. The rest of the window is mostly wind-affected, with a few small, clean moments that are worth a look if you’re desperate.
Rusty.
Short Range ForecastModerate rain (total 10mm), heaviest on Sun night. Warm (max 21°C on Sun afternoon, min 13°C on Fri morning). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 5mm), mostly falling on Mon morning. Very mild (max 19°C on Wed night, min 11°C on Wed morning). Winds decreasing (fresh winds from the SSW on Mon afternoon, calm by Wed afternoon). | ||||||||||||||||||||
Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | |||||||||||||||
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 16 | SW 16 | SW 15 | SW 15 | SW 15 | SW 17 | SW 16 | SW 15 | SW 14 | SW 14 | SW 8 | SW 15 | SW 14 | SW 14 | SW 13 | SW 13 | SW 15 | SW 21 | SW 19 | SW 18 |
Wave Graph | |||||||||||||||||||||
1048 | 1511 | 1402 | 1216 | 936 | 924 | 1267 | 886 | 550 | 341 | 1107 | 567 | 1823 | 1155 | 747 | 495 | 320 | 410 | 513 | 2291 | 1904 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross | cross | cross | on | cross | cross | cross | cross | glassy | cross | glassy | cross | cross | cross-on | cross |
High Tide | 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 | 12:24PM1.38m | 00:36AM1.00m | |||||||
Low Tide | 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 | 5:57AM0.09m | 6:51PM0.02m | ||||||||
7:09 | — | — | 7:07 | — | — | 7:05 | — | — | 7:05 | — | — | 7:03 | — | — | 7:03 | — | — | 7:01 | — | — | |
— | 6:14 | — | — | 6:14 | — | — | 6:15 | — | — | 6:15 | — | — | 6:15 | — | — | 6:16 | — | — | 6:16 | — | |
mm | — | — | — | — | — | — | — | — | 10 | 5 | — | — | — | — | — | — | — | — | — | — | 1 |
Temp °C | 13 | 13 | 14 | 15 | 16 | 15 | 19 | 21 | 20 | 15 | 15 | 14 | 14 | 14 | 14 | 15 | 18 | 19 | 22 | 25 | 23 |
Feels °C | 10 | 10 | 12 | 13 | 12 | 12 | 13 | 15 | 14 | 12 | 10 | 7 | 9 | 10 | 12 | 11 | 16 | 14 | 16 | 20 | 19 |
Swell 1 Height (m) Direction Period (s) | SW 15 | SW 16 | SW 16 | SW 15 | SW 15 | SW 15 | SW 17 | SW 16 | SW 15 | SW 14 | — | — | — | SW 14 | SW 14 | SW 13 | SW 13 | SW 15 | SW 15 | SW 19 | SW 18 |
1048 | 1511 | 1402 | 1216 | 936 | 924 | 1267 | 886 | 550 | 341 | — | — | — | 1155 | 747 | 495 | 320 | 410 | 479 | 2291 | 1904 | |
Swell 2 Height (m) Direction Period (s) | SW 18 | — | — | SW 23 | SW 21 | SW 19 | — | — | — | SW 20 | — | — | — | — | — | SW 18 | SW 16 | SW 24 | SW 21 | SW 14 | — |
375 | — | — | 86 | 285 | 369 | — | — | — | 15 | — | — | — | — | — | 48 | 127 | 22 | 513 | 7 | — | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | SW 17 | — | — | — | — | — | NE 3 | — | NNE 3 | NNW 4 | SW 14 | SW 8 | SW 15 | SW 14 | — | N 2 | — | NE 3 | N 4 | — | NNE 2 |
75 | — | — | — | — | — | 2 | — | 4 | 11 | 1107 | 567 | 1823 | 73 | — | 1 | — | 3 | 27 | — | 1 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 361 | 287 | 552 | 1202 | 1197 | 0 | 0 | 0 | 0 | 401 | 178 | 146 |
Best forecast wave conditions in Nullarbor | |||||||||||||||||||||
Best forecast wave conditions in Australia | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
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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.











