Surf Forecasts:
Cactus surf forecast from 30 Aug 2026:
- Best quality surf: Saturday 5 Sep, 9PM (local time) - 8ft (2.5m), 16s period, SW swell with offshore winds.
- Most powerful swell: Saturday 5 Sep, 3PM (local time) - 8ft (2.5m), 16s period, SW swell with 3,761 kJ wave energy.
- Next surfable swell (1★+): Monday 31 Aug, 6AM (local time) - 4.5ft (1.3m), 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 Monday (Aug 31) at 6AM. The primary swell is predicted to be 1.3m and 16s period with a secondary swell of 0.8m and 19s. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Cactus in the next 16 days are 2.5m 16s and forecast to arrive on Saturday (Sep 05) at 3PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 4s period and expected on Tuesday (Sep 01) at 6AM.
| Wave Type | Time (ACST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6AM (Mon 31st Aug) | 4.5ft (1.3m) 16s |
| Best Surf | 9PM (Sat 5th Sep) | 8ft (2.5m) 16s |
| Most Powerful | 3PM (Sat 5th Sep) | 8ft (2.5m) 16s |
Table - best surf conditions forecast for Cactus over the next 16 days.
The Lowdown
Alright, Rusty here. Let's break down what's on the table for Cactus.
The coming days are looking a bit like a mixed bag, but there are definitely some windows to get excited about. The overall pattern starts off with some solid, clean groundswell, then gets a bit messy with onshore winds before cleaning up again for some real standout sessions later on.
Right now, Sunday the 30th of August is on the cards. We've got a long-period 4ft SW groundswell rolling in, with a period of 19 seconds. That's proper energy, with combined swell energy at 1016 (moderate). The wind is a gentle offshore from the east, keeping things glassy. The water temp is sitting at 60°, which is about average for the time of year. This is excellent, clean surf, but it's a reef break, and the 4ft on a long period might be a bit walled at a beachie, but for a reef, it’ll be peeling nicely.
We hit a rough patch from Tuesday the 1st of September through to the middle of the following week. The wind turns onshore and gets strong, and the surf gets lumpy and blown out. Tuesday morning looks clean but the swell drops right off to 4ft with a short period, and then the onshores kill it for the next few days. There's a short gap of a few days with nothing really worth paddling out for.
Thursday the 3rd of September morning is a bit of a tease. The wind goes light offshore from the north, and the swell is a consistent 5ft from the SW, but the period has dropped to 14 seconds. The combined energy is moderate at 975. It’s a clean, surfable wave, but not a standout.
Now, for the real deal. We’ve got a promising stretch starting Sunday the 13th of September. The morning sees a 8ft SW groundswell with a 17-second period, and the wind is a clean cross-offshore from the NNE. The combined energy is very strong at 5785. This is a big, powerful swell for experienced surfers only. The afternoon cleans up even more with a lighter 7ft swell and offshore winds. That Sunday afternoon session is one of the best on offer.
Then Monday the 14th of September morning still has some size, with an 8ft SW swell, but the wind is a fresh cross-offshore, so it’ll be clean but getting a bit on the bigger side. The combined energy is 2458 (strong). By the afternoon, the wind swings onshore and ruins it, so get it early.
The Standout: Without a doubt, Sunday the 13th of September is the session to circle. The combination of a very long-period SW groundswell (7ft - 8ft), combined with light to moderate cross-offshore winds from the NNE, is going to produce some of the best, cleanest waves of the forecast period at Cactus. The reef will handle the long-period energy perfectly, giving you proper, lined-up waves. Get on it.
Cactus is a fairly consistent reef, so it doesn't stay flat for long, and crowds are possible here.
Rusty.
Short Range ForecastMostly dry. Warm (max 25°C on Tue morning, min 13°C on Tue night). Winds decreasing (fresh winds from the N on Mon night, calm by Wed night). | Days 4-6 Weather SummaryLight rain (total 4mm), mostly falling on Thu night. Warm (max 22°C on Fri morning, min 13°C on Sat night). Mainly strong winds. | ||||||||||||||||||||
Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | Saturday 5 | Sunday 6 | |||||||||||||||
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 15 | SW 16 | SW 16 | SW 14 | SW 14 | SW 14 | SW 14 | SW 15 | SW 15 | SW 15 | SW 15 | SW 16 | SW 16 | SW 16 | WSW 15 | WSW 14 | SW 12 |
Wave Graph | |||||||||||||||||||||
1642 | 1453 | 909 | 692 | 355 | 1123 | 692 | 1094 | 1196 | 990 | 1029 | 1882 | 1706 | 2517 | 1568 | 2901 | 3761 | 2736 | 2015 | 3331 | 2449 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross-off | cross | on | cross-on | on | on | cross-on | cross | cross | cross-off | cross | on | on | on | on | off | cross-off | on | on |
High Tide | 1:40PM1.24m | 1:55AM1.26m | 1:54PM1.12m | 2:17AM1.24m | 2:01PM0.98m | 2:38AM1.18m | 1:55PM0.86m | 2:56AM1.07m | 1:20PM0.80m | 3:04AM0.92m | 12:18PM0.85m | 2:38AM0.77m | 11:43AM0.99m | 1:29AM0.68m | |||||||
Low Tide | 7:45PM-0.04m | 8:01AM0.06m | 7:57PM-0.01m | 8:24AM0.19m | 8:04PM0.03m | 8:42AM0.36m | 8:05PM0.07m | 8:45AM0.54m | 7:54PM0.11m | 7:58AM0.69m | 7:31PM0.13m | 6:09AM0.69m | 7:06PM0.13m | ||||||||
6:56 | — | — | 6:56 | — | — | 6:54 | — | — | 6:52 | — | — | 6:52 | — | — | 6:50 | — | — | 6:48 | — | — | |
— | 6:20 | — | — | 6:20 | — | — | 6:21 | — | — | 6:22 | — | — | 6:22 | — | — | 6:22 | — | — | 6:23 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | 4 | — | — | — | — | — | — | 6 | 4 | 2 |
Temp °C | 21 | 24 | 24 | 25 | 18 | 15 | 14 | 14 | 14 | 18 | 18 | 18 | 22 | 18 | 15 | 15 | 15 | 16 | 21 | 13 | 14 |
Feels °C | 16 | 19 | 19 | 17 | 15 | 11 | 8 | 8 | 11 | 16 | 15 | 15 | 17 | 12 | 9 | 10 | 12 | 7 | 11 | 1 | 5 |
Swell 1 Height (m) Direction Period (s) | SW 19 | SW 18 | SW 16 | SW 16 | SW 15 | — | SW 16 | SW 14 | SW 14 | SW 14 | SW 14 | SW 15 | SW 15 | SW 15 | — | SW 16 | SW 16 | SW 16 | — | — | — |
1642 | 1453 | 909 | 692 | 355 | — | 692 | 1094 | 1196 | 990 | 1029 | 1882 | 1706 | 2517 | — | 2901 | 3761 | 2736 | — | — | — | |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | SW 18 | — | SW 6 | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
— | — | — | — | 307 | — | 65 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | NE 3 | — | N 3 | NNW 4 | WNW 4 | SW 16 | — | SW 14 | SW 15 | — | SW 14 | — | — | SW 15 | SW 15 | SW 16 | SW 16 | — | WSW 15 | WSW 14 | SW 12 |
2 | — | 3 | 25 | 18 | 1123 | — | 1094 | 75 | — | 47 | — | — | 1568 | 1568 | 64 | 69 | — | 2015 | 3331 | 2449 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 1 | 0 | 1 | 1344 | 510 | 940 | 1093 | 1045 | 0 | 1 | 0 | 178 | 1149 | 1228 | 1217 | 1685 | 1719 | 0 | 649 | 632 | 838 |
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.











