
Surf Forecasts:
Cactus surf forecast from 12 Sep 2026:
- Best quality surf: Monday 14 Sep, 6AM (local time) - 4ft (1.2m), 14s period, SW swell with glassy winds.
- Most powerful swell: Wednesday 16 Sep, 3PM (local time) - 5.5ft (1.7m), 15s period, SW swell with 1,306 kJ wave energy.
- Next surfable swell (1★+): Monday 14 Sep, 6AM (local time) - 4ft (1.2m), 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 Monday (Sep 14) at 6AM. The primary swell is predicted to be 1.2m and 14s period with a secondary swell of 0.3m and 19s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Cactus in the next 16 days are 1.7m 15s and forecast to arrive on Wednesday (Sep 16) at 3PM. 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 6s period and expected on Wednesday (Sep 16) at 3AM.
| Wave Type | Time (ACST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6AM (Mon 14th Sep) | 4ft (1.2m) 14s |
| Best Surf | 6AM (Mon 14th Sep) | 4ft (1.2m) 14s |
| Most Powerful | 3PM (Wed 16th Sep) | 5.5ft (1.7m) 15s |
Table - best surf conditions forecast for Cactus over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s have a proper look at what Cactus has in store for us over the next couple of weeks. This is a solid reef setup that loves a southwest swell, and we’ve got a bit of a slow start before things really fire up.
The first week is a tale of two halves. Early on, there's nothing worth paddling out for. Saturday the 12th is a write-off with a 16 mph cross breeze from the NNW making a mess of the 3 ft swell. Sunday the 13th is even worse with onshore winds. You’re better off staying on the beach. Monday morning the 14th though, we finally get a glimmer. The wind goes glassy from the SSE, dropping to just 3 mph, and though the swell is only 3 ft, it’s clean and that long 11-second period will give the reef something to work with. The lagoon will look pretty.
Tuesday the 15th and Wednesday the 16th see the swell building to 5 ft, but the wind picks up to 19 mph from the SE, staying cross-offshore. It’ll be clean but powerful, and the combined energy is ramping up from moderate to strong (949 - 1306). That’s decent, punchy surf, but you’ll want to be on your game. Thursday the 17th afternoon is a quiet gem – offshore wind from the ENE at 9 mph, with a clean 4 ft southwest swell. It’ll be tidy and fun, with gentle lines.
Now, the standout window is the second week. There’s a little dry spell Friday the 18th through the weekend, with the swell dropping off and the wind getting messy. But hold onto your board for Monday the 21st. We start seeing some proper energy building, and by Tuesday the 22nd, Cactus absolutely lights up. Tuesday afternoon (22nd September) is the pick of the fortnight. You’ve got a clean 7 ft SW groundswell with a 16-second period, gentle offshore wind from the east at 9 mph. The combined energy is massive at 2070. This is excellent, world-class reef surf for experienced chargers. The sets will be clean, lined up, and powerful.
Wednesday the 23rd afternoon keeps the quality high with a 5 ft swell and offshore NE winds, still very good. But Tuesday the 22nd is the one to circle. It is, without doubt, the best session on offer. The water temp is around 60°F, which is bang on average for this time of year, so a decent 4/3 should do you.
Later in the week, Friday the 25th morning brings another spike with a 6 ft, 19-second groundswell and light ESE winds. That’s a lot of water moving, but the long period will make it fast and deep – best for the experienced crew at this reef. Saturday the 26th is still solid but the winds turn a bit more side-off. Overall, we’ve got a great run of clean, powerful swell. Don’t sleep on that Tuesday.
Rusty.
Short Range ForecastMostly dry. Warm (max 28°C on Sat afternoon, min 13°C on Sun night). Winds decreasing (fresh winds from the SW on Sat night, calm by Sun night). | Days 5-7 Weather SummaryMostly dry. Warm (max 23°C on Fri morning, min 8°C on Tue night). Winds decreasing (fresh winds from the ESE on Tue night, light winds from the NE by Thu morning). | |||||||||||||||||||
Sat 12 | Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | ||||||||||||||
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 16 | SW 18 | SW 16 | SW 16 | SW 14 | SW 11 | SW 14 | SW 16 | SW 15 | SW 14 | SW 14 | SW 15 | SW 15 | SW 15 | SW 14 | SW 14 | SW 13 | SW 16 | SW 15 | SW 14 |
Wave Graph | ||||||||||||||||||||
474 | 307 | 432 | 627 | 752 | 166 | 390 | 728 | 949 | 911 | 911 | 1246 | 1306 | 859 | 573 | 428 | 282 | 203 | 224 | 206 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-off | on | on | on | glassy | cross | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | off | cross-off | off | cross-off | cross-off | cross-off | cross-off |
High Tide | 00:58AM1.24m | 12:58PM1.18m | 1:14AM1.30m | 1:09PM1.14m | 1:31AM1.32m | 1:19PM1.09m | 1:48AM1.30m | 1:29PM1.04m | 2:06AM1.24m | 1:37PM0.97m | 2:22AM1.15m | 1:38PM0.90m | 2:36AM1.02m | |||||||
Low Tide | 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 | 7:53AM0.17m | 7:36PM-0.05m | 8:08AM0.26m | 7:47PM0.01m | 8:19AM0.37m | 7:53PM0.09m | |||||||
— | — | 6:39 | — | — | 6:39 | — | — | 6:37 | — | — | 6:35 | — | — | 6:35 | — | — | 6:33 | — | — | |
6:27 | — | — | 6:28 | — | — | 6:28 | — | — | 6:29 | — | — | 6:30 | — | — | 6:30 | — | — | 6:30 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 28 | 27 | 15 | 14 | 14 | 16 | 16 | 15 | 13 | 13 | 12 | 14 | 16 | 15 | 19 | 22 | 21 | 23 | 27 | 25 |
Feels °C | 23 | 23 | 11 | 9 | 13 | 14 | 12 | 12 | 7 | 7 | 6 | 9 | 9 | 9 | 15 | 17 | 16 | 16 | 21 | 19 |
Swell 1 Height (m) Direction Period (s) | SW 16 | SW 14 | SW 16 | SW 16 | SW 14 | SW 11 | SW 14 | SW 16 | SW 15 | SW 14 | SW 14 | SW 15 | SW 15 | SW 15 | SW 14 | SW 14 | SW 13 | SW 16 | SW 15 | SW 14 |
474 | 248 | 432 | 627 | 752 | 166 | 390 | 728 | 949 | 911 | 911 | 1246 | 1306 | 859 | 573 | 428 | 282 | 203 | 224 | 206 | |
Swell 2 Height (m) Direction Period (s) | SW 20 | SW 18 | S 9 | — | — | SW 14 | SW 18 | — | — | — | S 6 | — | — | S 5 | — | — | — | SSW 12 | SW 18 | — |
66 | 307 | 2 | — | — | 158 | 109 | — | — | — | 32 | — | — | 21 | — | — | — | 88 | 13 | — | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | SW 19 | SW 14 | — | — | — | — | — | — | — | — | — | — | — | — | — |
— | — | — | — | — | 57 | 125 | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | NW 3 | N 3 | SW 4 | — | SW 15 | — | — | SE 3 | SSE 4 | SSE 5 | ESE 4 | E 4 | SE 2 | ESE 4 | NE 3 | — | ESE 3 | N 3 | NNW 4 | N 3 |
3 | 8 | 21 | — | 75 | — | — | 1 | 15 | 44 | 28 | 21 | 1 | 17 | 6 | — | 4 | 8 | 4 | 4 | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 178 | 1 | 510 | 510 | 648 | 0 | 632 | 0 | 491 | 491 | 500 | 361 | 132 | 0 | 1 | 0 | 1 | 401 | 178 | 178 |
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.










