
Surf Forecasts:
Cactus surf forecast from 9 Sep 2026:
- Best quality surf: Wednesday 16 Sep, 3AM (local time) - 5ft (1.6m), 14s period, SW swell with offshore winds.
- Most powerful swell: Wednesday 9 Sep, 6PM (local time) - 8ft (2.4m), 17s period, SSW swell with 3,260 kJ wave energy.
- Next surfable swell (1★+): Friday 11 Sep, 3AM (local time) - 4.5ft (1.4m), 15s 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 Friday (Sep 11) at 3AM. The primary swell is predicted to be 1.4m and 15s period with a secondary swell of 0.1m and 24s. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Cactus in the next 16 days are 2.4m 17s and forecast to arrive on Wednesday (Sep 09) at 6PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 5s period and expected on Thursday (Sep 10) at 3AM.
| Wave Type | Time (ACST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3AM (Fri 11th Sep) | 4.5ft (1.4m) 15s |
| Best Surf | 3AM (Wed 16th Sep) | 5ft (1.6m) 14s |
| Most Powerful | 6PM (Wed 9th Sep) | 8ft (2.4m) 17s |
Table - best surf conditions forecast for Cactus over the next 16 days.
The Lowdown
Right, listen up. I’m Rusty, and I’ve been staring at the charts for Cactus. It’s a reef break that loves a good SW groundswell, and we’ve got plenty of that on the way. The water’s sitting at 61°F right now, which is pretty much bang on average for this time of year – nothing to write home about.
The real story is the size. This isn’t a week for learners. We’re starting off with a solid pulse. Wednesday the 9th kicks things off with a 6ft swell from the SW, but that cross-off ESE wind at 25 mph is going to make it a battle. The combined energy is a massive 2632 (moderate to strong), but the conditions are marginal. You’ll be scratching for a clean one.
Thursday the 10th is a step up in quality. The wind swings E at 19 mph, going offshore, and we’ve got a 6ft SW groundswell with a 16-second period. The energy is still chunky at 1571. That’s proper, clean reef surf. It’s a good day for the experienced crew.
Friday the 11th is where it gets interesting. The swell drops a touch to 4ft, but the period is a lovely 15 seconds, and the wind is light offshore from the ENE at 16 mph. The water will be glassy. The energy is a bit lower at 707, but the quality will be there. This is a standout morning for a longboard or a funboard.
Saturday the 12th is still rideable with 4ft from the SW and a 17-second period, but the wind goes cross-off from the NNE. It’s clean, but the energy drops to 1143. It’s a solid session, not epic.
Sunday the 13th is a write-off. The wind goes cross-on from the SSW, the swell drops, and the energy is weak. Don’t bother.
We then have a flat spell through Monday the 14th and into Tuesday the 15th. The 15th sees a new pulse of 6ft SW swell arrive, but the wind is cross-off from the E. It’s okay, but the real highlight is Wednesday the 16th. The forecast is calling for a 6ft SW groundswell with a 16-second period, and the wind is a light cross-off from the NNE at 6 mph. The energy is 1357, and the notes say “excellent surf conditions for experienced surfers.” That is the best on offer in the entire window. The reef will be lining up perfectly.
After that, it’s a mixed bag. Thursday the 17th has a 4ft SW swell, but the afternoon gets ruined by a 22 mph cross-shore wind. The 21st has a 5ft SW swell with light offshore NE wind, which is a good morning session. But the real wildcard is the 22nd of September. We’re looking at a 8ft building to a 10ft SW groundswell with a 17-second period. The energy is off the charts at 3314 and 4766 – that’s strong to very strong wave energy. But the wind is cross-on from the S, making it choppy and messy. That’s a massive, powerful, straight-breaking wall of water. For the experts only, and even then, it’s a kite-surfing day if you’ve got the gear. The 23rd and 24th are blown out by strong southerly winds.
So, to wrap it up: your best bet is Friday the 11th for the clean, fun-sized waves, and Wednesday the 16th for the bigger, more powerful, and perfectly groomed reef set. The 22nd is a monster, but only for the brave.
Rusty.
Short Range ForecastMostly dry. Warm (max 24°C on Sat morning, min 10°C on Wed night). Winds decreasing (strong winds from the ESE on Wed night, light winds from the E by Fri afternoon). | Days 5-7 Weather SummaryMostly dry. Warm (max 27°C on Sat afternoon, min 12°C on Mon night). Wind will be generally light. | |||||||||||||||||||
Wed 9 | Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | ||||||||||||||
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) | SSW 18 | SW 16 | SW 16 | SSW 16 | SW 15 | SW 15 | SW 15 | SW 16 | SW 17 | SW 16 | SW 18 | SW 16 | SW 16 | SW 15 | SW 14 | SW 14 | SW 16 | SW 14 | SW 14 | SW 14 |
Wave Graph | ||||||||||||||||||||
3553 | 2187 | 1571 | 1460 | 893 | 685 | 753 | 746 | 742 | 546 | 307 | 515 | 416 | 262 | 241 | 238 | 211 | 1407 | 1218 | 1049 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | off | cross-off | cross-off | off | off | off | cross-off | cross | cross-off | cross-on | cross-on | cross | cross-off | cross | cross-off | cross-off | cross-off | cross-off |
High Tide | 00:26AM0.90m | 12:24PM1.29m | 00:33AM1.03m | 12:37PM1.26m | 00:44AM1.14m | 12:48PM1.22m | 00:58AM1.24m | 12:58PM1.18m | 1:14AM1.30m | 1:09PM1.14m | 1:31AM1.32m | 1:19PM1.09m | 1:48AM1.30m | |||||||
Low Tide | 6:43PM0.10m | 6:04AM0.12m | 6:44PM0.07m | 6:23AM0.05m | 6:47PM0.04m | 6:43AM0.02m | 6:53PM-0.01m | 7:01AM0.02m | 7:01PM-0.05m | 7:19AM0.05m | 7:11PM-0.08m | 7:37AM0.10m | 7:23PM-0.08m | |||||||
— | — | 6:43 | — | — | 6:43 | — | — | 6:41 | — | — | 6:39 | — | — | 6:39 | — | — | 6:37 | — | — | |
6:24 | — | — | 6:25 | — | — | 6:27 | — | — | 6:27 | — | — | 6:28 | — | — | 6:28 | — | — | 6:29 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 14 | 13 | 15 | 18 | 18 | 19 | 20 | 20 | 24 | 27 | 26 | 21 | 19 | 16 | 17 | 17 | 15 | 17 | 18 | 19 |
Feels °C | 6 | 5 | 8 | 11 | 12 | 15 | 16 | 16 | 18 | 23 | 22 | 19 | 16 | 13 | 15 | 13 | 12 | 13 | 13 | 15 |
Swell 1 Height (m) Direction Period (s) | SSW 18 | SW 16 | SW 16 | SSW 16 | SW 15 | SW 15 | SW 15 | SW 16 | SW 17 | SW 16 | SW 14 | SW 16 | SW 16 | SW 15 | SW 14 | SW 14 | SW 13 | SW 14 | SW 14 | SW 14 |
3553 | 2187 | 1571 | 1460 | 893 | 685 | 753 | 746 | 742 | 546 | 248 | 515 | 416 | 262 | 241 | 238 | 138 | 1407 | 1218 | 1049 | |
Swell 2 Height (m) Direction Period (s) | — | — | — | SW 26 | SW 25 | SW 24 | — | — | SW 18 | SW 20 | SW 18 | — | — | — | SW 19 | SW 18 | SW 16 | — | — | — |
— | — | — | 26 | 25 | 22 | — | — | 392 | 66 | 307 | — | — | — | 57 | 111 | 211 | — | — | — | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | WSW 6 | — | — | — | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 4 | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | S 18 | ESE 5 | E 4 | SE 3 | E 2 | ENE 3 | — | — | NE 3 | — | NNE 3 | NNW 3 | SW 16 | — | — | S 4 | SSE 5 | SE 2 | SSE 2 | SSE 2 |
160 | 40 | 15 | 2 | 1 | 3 | — | — | 2 | — | 3 | 2 | 64 | — | — | 13 | 49 | 1 | 1 | 1 | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 1577 | 838 | 838 | 132 | 0 | 0 | 0 | 0 | 1 | 178 | 1 | 564 | 648 | 0 | 0 | 632 | 0 | 0 | 0 | 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.










