
Surf Forecasts:
Cactus surf forecast from 4 Sep 2026:
- Best quality surf: Sunday 6 Sep, 3AM (local time) - 7ft (2.1m), 14s period, SW swell with cross-offshore winds.
- Most powerful swell: Wednesday 9 Sep, 12PM (local time) - 7ft (2.1m), 19s period, SW swell with 3,253 kJ wave energy.
- Next surfable swell (1★+): Sunday 6 Sep, 3AM (local time) - 7ft (2.1m), 14s 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 Sunday (Sep 06) at 3AM. The primary swell is predicted to be 2.1m and 14s period. 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 2.1m 19s and forecast to arrive on Wednesday (Sep 09) at 12PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.3m 5s period and expected on Monday (Sep 07) at 12AM.
| Wave Type | Time (ACST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3AM (Sun 6th Sep) | 7ft (2.1m) 14s |
| Best Surf | 3AM (Sun 6th Sep) | 7ft (2.1m) 14s |
| Most Powerful | 12PM (Wed 9th Sep) | 7ft (2.1m) 19s |
Table - best surf conditions forecast for Cactus over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s have a look at the one and only spot on the cards for this stretch: Cactus. This is a reef break, so it’s a setup that can handle a bit more oomph, but it’s got a tricky side to it, so it’s one for the intermediate crew and above.
The immediate outlook is a bit of a write-off. We’ve got a solid SW groundswell arriving, but for the first few days, the wind is a mess. Friday (4th) and Saturday (5th) are a complete no-go. The wind is either onshore or cross-on and blowing a gale, up to 22 mph, turning that 8ft to 10ft swell into a total washing machine. The wave energy is high (4381 on Friday arvo), but it’s useless. You’d be better off taking the kite out if you’re into that sort of thing.
The first real glimmer of hope hits on Sunday morning (6th). The wind swings offshore from the ENE at 12 mph, and the swell drops to a still-chunky 6ft, coming from the SW with a long 14-second period. The wave energy is a solid 1244, which is a good, punchy amount. That’s the first standout. It’s clean, off-shore, and the reef will be handling that long-period groundswell beautifully. It’s a bit much for beginners (over 5ft), but for the experienced surfer, this is the moment. Water temps are about average for the time of year, so no surprises there.
The pattern then gets a bit lumpy. Monday (7th) drops right off to 3ft – not enough to get excited about even with offshore wind. But then Tuesday (8th) morning brings another excellent window. The swell bumps back up to 5ft, but the period stretches to 17 seconds. That is very long-period groundswell. The wind is light offshore from the east at 12 mph, and the wave energy is 1409. The reef at Cactus will love that long period, turning it into proper, lined-up waves. Again, it’s an expert-only session due to the size and power.
Then we hit a long, frustrating gap. From Wednesday (9th) all the way through to Tuesday (15th), the wind turns nasty again. We’re talking strong to near-gale force winds, mostly cross-off or onshore, making a mess of everything. The swell sticks around, but it’s just not worth paddling out. The wave energy gets high again (like 3186 on the 9th), but it's all wind-chop. This is a solid week of nothing.
The next chance pops up on Thursday (17th) morning. The wind backs off to a cross-off 22 mph from the SE, and the swell is a solid 10ft from the SW with a 18-second period. 4703 wave energy. That’s a big, powerful, long-period groundswell. It’s going to be a raw, heavy day. Only for the very experienced. It’s promising, but it’s a week away, so keep an eye on it.
Finally, the last weekend of the forecast brings the best on offer. Friday (18th) morning is a true standout. The wind is a glassy, gentle offshore from the ENE at 9 mph, the swell is a solid 8ft from the SW with a 15-second period, and the wave energy is 2268. That’s the perfect combo for a reef break like Cactus: clean, powerful, and long lines. Saturday (19th) morning is also a beauty, with the swell dropping to 5ft and the same gentle offshore wind. It’s a smaller, cleaner version of the day before.
So, if I had to pick just one or two true standouts: Sunday (6th) morning is the first real chance, and Friday (18th) morning is the one to circle on the calendar. That Friday session at Cactus could be the best of the lot, with clean, solid SW groundswell and perfect offshore conditions. It’s a reef break, so expect an occasional crowd, but it’ll be worth it.
Rusty.
Short Range ForecastLight rain (total 3mm), mostly falling on Sun night. Warm (max 25°C on Fri morning, min 11°C on Sat night). Winds decreasing (fresh winds from the WSW on Fri night, light winds from the E by Sat night). | Days 4-6 Weather SummaryModerate rain (total 12mm), heaviest on Mon night. Very mild (max 14°C on Mon afternoon, min 8°C on Wed night). Winds increasing (light winds from the E on Mon night, strong winds from the ESE by Wed morning). | ||||||||||||||||||||
Friday 4 | Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | |||||||||||||||
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 15 | SW 15 | SW 12 | SW 13 | SW 14 | SW 14 | SW 14 | SW 13 | SW 13 | SW 13 | SW 18 | SW 17 | SW 16 | SW 16 | SW 19 | SW 19 | SW 17 | SW 16 | SW 16 | SW 15 |
Wave Graph | |||||||||||||||||||||
1823 | 2490 | 1246 | 1761 | 1834 | 1680 | 1244 | 1130 | 444 | 242 | 352 | 850 | 1537 | 1276 | 1096 | 2804 | 3085 | 2442 | 1922 | 1571 | 1091 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | on | on | on | cross-on | cross | off | cross-off | cross-off | off | cross-off | cross-off | off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | off |
High Tide | 1:20PM0.80m | 3:04AM0.92m | 12:18PM0.85m | 2:38AM0.77m | 11:43AM0.99m | 1:29AM0.68m | 11:44AM1.13m | 00:44AM0.70m | 11:57AM1.23m | 00:28AM0.79m | 12:11PM1.28m | 00:26AM0.90m | 12:24PM1.29m | 00:33AM1.03m | |||||||
Low Tide | 7:54PM0.11m | 7:58AM0.69m | 7:31PM0.13m | 6:09AM0.69m | 7:06PM0.13m | 5:24AM0.54m | 6:51PM0.12m | 5:29AM0.37m | 6:45PM0.11m | 5:45AM0.23m | 6:43PM0.10m | 6:04AM0.12m | 6:44PM0.07m | ||||||||
6:52 | — | — | 6:50 | — | — | 6:48 | — | — | 6:48 | — | — | 6:47 | — | — | 6:46 | — | — | 6:43 | — | — | |
— | 6:22 | — | — | 6:22 | — | — | 6:23 | — | — | 6:23 | — | — | 6:24 | — | — | 6:24 | — | — | 6:25 | — | |
mm | — | 1 | — | — | — | — | — | — | 2 | 2 | — | 4 | 2 | 1 | 3 | — | — | — | — | — | — |
Temp °C | 25 | 20 | 17 | 14 | 13 | 13 | 15 | 16 | 13 | 12 | 14 | 13 | 12 | 13 | 13 | 11 | 14 | 11 | 13 | 16 | 15 |
Feels °C | 20 | 14 | 13 | 7 | 8 | 10 | 11 | 11 | 8 | 7 | 10 | 8 | 10 | 9 | 6 | 2 | 6 | 2 | 6 | 9 | 9 |
Swell 1 Height (m) Direction Period (s) | SW 15 | SW 15 | — | — | — | SW 14 | SW 14 | SW 14 | SW 13 | SW 13 | SW 13 | SW 18 | SW 17 | SW 16 | SW 16 | SW 19 | SW 19 | SW 17 | SW 16 | SW 16 | SW 15 |
1823 | 2490 | — | — | — | 1680 | 1244 | 1130 | 444 | 242 | 352 | 850 | 1537 | 1276 | 1096 | 2804 | 3085 | 2442 | 1922 | 1571 | 1091 | |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | SW 23 | S 6 | SW 20 | SW 13 | — | — | SSW 24 | S 7 | — | S 22 | — | — | SW 25 |
— | — | — | — | — | — | — | — | 21 | 39 | 259 | 205 | — | — | 55 | 1 | — | 9 | — | — | 25 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | SW 21 | — | — | — | — | — | — | — | — | — | — | — |
— | — | — | — | — | — | — | — | — | 71 | — | — | — | — | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | N 3 | SW 15 | SW 15 | SW 12 | SW 13 | — | — | ESE 2 | SSE 5 | E 4 | ESE 4 | SE 6 | — | — | SSE 6 | SE 6 | SE 7 | SE 8 | E 4 | — | — |
5 | 1761 | 1246 | 1761 | 1834 | — | — | 1 | 90 | 36 | 10 | 30 | — | — | 71 | 128 | 102 | 181 | 28 | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 503 | 564 | 1149 | 1035 | 1198 | 0 | 0 | 0 | 491 | 132 | 0 | 0 | 0 | 552 | 1510 | 1577 | 1522 | 491 | 243 | 132 | 0 |
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.










