
Surf Forecasts:
Cactus surf forecast from 4 Aug 2026:
- Best quality surf: Thursday 6 Aug, 9PM (local time) - 5.5ft (1.7m), 16s period, SW swell with offshore winds.
- Most powerful swell: Sunday 9 Aug, 6PM (local time) - 10ft (3.0m), 20s period, SW swell with 7,820 kJ wave energy.
- Next surfable swell (1★+): Thursday 6 Aug, 6AM (local time) - 3.5ft (1.1m), 16s period with SW swell.
Best Forecast Surf Conditions for Cactus this week:
The surf forecast for Cactus over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Thursday (Aug 06) at 6AM. The primary swell is predicted to be 1.1m and 16s period with a secondary swell of 0.5m and 4s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Cactus in the next 16 days are 3.0m 20s and forecast to arrive on Sunday (Aug 09) at 6PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 4s period and expected on Friday (Aug 07) at 6AM.
| Wave Type | Time (ACST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6AM (Thu 6th Aug) | 3.5ft (1.1m) 16s |
| Best Surf | 9PM (Thu 6th Aug) | 5.5ft (1.7m) 16s |
| Most Powerful | 6PM (Sun 9th Aug) | 10ft (3.0m) 20s |
Table - best surf conditions forecast for Cactus over the next 16 days.
The Lowdown
Alright, let’s get this out there. The 16-day window starts with a bit of a whimper, but there are some real gems tucked away if you’re willing to be patient.
The first few days are pretty marginal. Wednesday and Thursday (the 5th and 6th) have some small swell, around 2ft to 4ft, but it’s not doing much. The wind is a bit messy, so it’s not really worth the paddle. The water temp is 60°, which is about normal for this time of year, so no major surprises there.
Then Friday the 7th shows a bit more life. Swell bumps up to 5-5ft with a 16-17 second period, and the wind is cross-offshore. The energy is moderate (1364), but the forecast notes it’s still marginal. It’s clean, but maybe not the best shape.
The weekend (the 8th and 9th) is a write-off. The wind goes onshore and gets strong, and the swell gets messy and big. Not for the faint-hearted. Saturday has 5ft but it’s poor, and Sunday gets much bigger with short period, onshore gales. That’s a full miss.
The start of the second week, from Monday the 10th through Thursday the 13th, is a period of too much of a good thing. We’re looking at solid SW groundswell, 8ft to 12ft, with strong energy (up to 9263). But the wind is onshore and strong, making it a complete mess. This is not a paddle-surfing window. If you’ve got a kite, maybe, but for a surfboard, it’s a hard pass.
Things start to settle down around Friday the 14th. The swell is still pumping at 8-8ft, but the wind is lighter. Still, it’s cross-onshore and choppy, so it’s not great.
The first real standout is Saturday the 15th. The swell drops to a more manageable 5-6ft, and the wind goes light and cross-shore. It’s not perfect, but it’s the cleanest it’s been in a while. The energy is moderate (1532).
But the true gem in this whole window is Sunday the 16th. The wind goes light offshore/cross-offshore and it’s glassy. The swell is a clean 4ft from the SW with a 15-second period. The energy is lower (842), but the conditions are prime. This is the day to be out there. It’s clean, and the wave quality will be worth the wait. The long period means it might be a bit straight at the beach breaks, but at a reef like Cactus, it should be lining up nicely. This is the pick of the bunch.
The following Monday the 17th has some clean waves with offshore wind, but the energy jumps around and it’s not quite as good. And then we see the last real standout on Wednesday the 19th. The swell is 6-6ft from the SW with a long 17-second period. The wind is offshore, and by the afternoon it goes glassy. This is another excellent window for experienced surfers. The energy is moderate to strong (1904). This one is worth planning for.
The rest of the second week fades out with smaller, cleaner surf but nothing that really stands out.
So, to keep it simple: the best bets are Sunday the 16th and Wednesday the 19th. The 16th will be the cleaner of the two, but the 19th has a bit more size. Both are worth the wait.
Rusty.
Short Range ForecastLight rain (total 3mm), mostly falling on Fri afternoon. Very mild (max 18°C on Wed afternoon, min 14°C on Wed night). Winds increasing (light winds from the SE on Thu morning, fresh winds from the NNW by Fri night). | Days 4-6 Weather SummaryHeavy rain (total 23mm), heaviest during Sun morning. Very mild (max 17°C on Sat afternoon, min 9°C on Sun morning). Winds increasing (moderate winds from the W on Sat night, near gales from the WSW by Sun afternoon). | ||||||||||||||||||||
Wednesday 5 | Thursday 6 | Friday 7 | Saturday 8 | Sunday 9 | Monday 10 | Tuesday 11 | |||||||||||||||
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 19 | SW 18 | SW 16 | SW 16 | SW 16 | SW 16 | SW 16 | SW 17 | SW 16 | SW 16 | SW 15 | WSW 14 | WSW 8 | WSW 9 | SW 19 | SW 17 | WSW 16 | WSW 16 | WSW 15 | SW 16 | SW 16 |
Wave Graph | |||||||||||||||||||||
361 | 694 | 581 | 567 | 909 | 1494 | 1364 | 1252 | 1052 | 1055 | 856 | 1121 | 908 | 1581 | 5481 | 3997 | 2964 | 2379 | 3700 | 4879 | 4169 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-on | cross | cross-off | cross | off | cross-off | cross-off | cross-off | cross | cross | cross-on | on | on | on | cross-on | cross-on | on | on | on | cross-on |
High Tide | 2:52PM0.90m | 3:49AM0.95m | 2:24PM0.75m | 4:31AM0.85m | 11:17AM0.96m | 2:07AM0.58m | 11:38AM1.14m | 1:00AM0.58m | 12:03PM1.28m | 00:48AM0.63m | 12:27PM1.36m | 00:49AM0.71m | |||||||||
Low Tide | 9:08PM0.19m | 9:37AM0.53m | 8:59PM0.25m | 9:18AM0.74m | 8:14PM0.26m | 7:25PM0.20m | 4:19AM0.56m | 7:12PM0.14m | 5:06AM0.41m | 7:16PM0.11m | 5:37AM0.27m | 7:23PM0.11m | |||||||||
7:24 | — | — | 7:22 | — | — | 7:22 | — | — | 7:22 | — | — | 7:20 | — | — | 7:20 | — | — | 7:18 | — | — | |
— | 6:02 | — | — | 6:04 | — | — | 6:05 | — | — | 6:05 | — | — | 6:06 | — | — | 6:07 | — | — | 6:07 | — | |
mm | — | — | — | — | — | — | — | 2 | 1 | 3 | 2 | 5 | 6 | 2 | 2 | 1 | — | 2 | — | — | — |
Temp °C | 16 | 18 | 15 | 16 | 16 | 17 | 17 | 16 | 18 | 16 | 17 | 15 | 11 | 12 | 13 | 14 | 15 | 15 | 13 | 14 | 14 |
Feels °C | 12 | 15 | 13 | 15 | 13 | 14 | 9 | 13 | 11 | 9 | 12 | 11 | 0 | -1 | 3 | 7 | 7 | 9 | 5 | 6 | 9 |
Swell 1 Height (m) Direction Period (s) | SW 19 | SW 18 | SW 16 | SW 16 | SW 16 | SW 16 | SW 16 | SW 17 | SW 16 | SW 16 | SW 15 | SW 14 | — | — | — | SW 17 | WSW 16 | SW 16 | — | — | — |
361 | 694 | 581 | 567 | 909 | 1494 | 1364 | 1252 | 1052 | 1055 | 856 | 33 | — | — | — | 3997 | 2964 | 38 | — | — | — | |
Swell 2 Height (m) Direction Period (s) | SW 15 | SW 9 | WSW 5 | SW 4 | SW 4 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
134 | 20 | 10 | 9 | 5 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Swell 3 Height (m) Direction Period (s) | SW 10 | — | S 8 | SSE 8 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
45 | — | 5 | 20 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | — | W 9 | SW 16 | S 4 | — | — | N 4 | NNW 4 | NNW 3 | NW 4 | WNW 4 | WSW 14 | WSW 8 | WSW 9 | SW 19 | — | WNW 2 | WSW 16 | WSW 15 | SW 16 | SW 16 |
— | 2 | 69 | 1 | — | — | 10 | 10 | 4 | 6 | 32 | 1121 | 908 | 1581 | 5481 | — | 1 | 2379 | 3700 | 4879 | 4169 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 1 | 178 | 0 | 0 | 0 | 0 | 401 | 1 | 1 | 564 | 1227 | 401 | 648 | 969 | 1229 | 510 | 510 | 1045 | 1510 | 1637 | 1344 |
Best forecast wave conditions in Nullarbor | |||||||||||||||||||||
Best forecast wave conditions in Australia | |||||||||||||||||||||
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Information about the Cactus Surf forecast
The above surf forecast table for Cactus provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Cactus can be found by selecting the local surf guide option on the grey menu. Our Cactus 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 (Cactus) 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 Cactus 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 Cactus, camping, hotels and holiday cottages in Nullarbor, consider staying in Thevenard which is 63 km (39 miles) away.











