Surf Forecasts:
Cactus surf forecast from 22 Aug 2026:
- Best quality surf: Thursday 27 Aug, 6PM (local time) - 7ft (2.1m), 18s period, SW swell with offshore winds.
- Most powerful swell: Friday 28 Aug, 6AM (local time) - 8ft (2.5m), 16s period, WSW swell with 3,139 kJ wave energy.
- Next surfable swell (1★+): Sunday 23 Aug, 12AM (local time) - 5ft (1.5m), 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 Sunday (Aug 23) at 12AM. The primary swell is predicted to be 1.5m and 15s period with a secondary swell of 0.7m 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 Friday (Aug 28) at 6AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.0m 4s period and expected on Thursday (Aug 27) at 9AM.
| Wave Type | Time (ACST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12AM (Sun 23rd Aug) | 5ft (1.5m) 15s |
| Best Surf | 6PM (Thu 27th Aug) | 7ft (2.1m) 18s |
| Most Powerful | 6AM (Fri 28th Aug) | 8ft (2.5m) 16s |
Table - best surf conditions forecast for Cactus over the next 16 days.
The Lowdown
Alright, let’s break it down.
The first real surf on offer isn’t until Saturday afternoon the 22nd of August at Cactus. This is a reef break, open to the southwest swell, and it’s fairly consistent, so you can usually count on something here. Water temp is about 60°F, which is pretty average for this time of year.
Saturday the 22nd brings a solid pulse of SW groundswell at 5ft with a very long period of 15 seconds. That kind of period means the energy is deep and the sets will have some punch, but with a 15-second gap, paddling out won’t be a total fight. The combined swell energy is a strong 1221 (moderate to strong). Wind is a light cross-shore from the SSE at 9 mph – not glass, but workable. It’s a marginal call, so keep an eye on the tide.
Sunday the 23rd looks cleaner. The swell holds at 5ft, period stretches to 17 seconds, and the wind goes cross-offshore from the NNE at 16 mph – that’ll groom the faces nicely. Energy jumps to 1267 (strong). Still a marginal tick, but that offshore flow is a major plus. It drops a little in the afternoon to 4ft, but still worth a session.
Things go downhill Monday the 24th and Tuesday the 25th – cross-onshore winds, lumpy, choppy, poor surf conditions. Not worth paddling out.
Wednesday the 26th is a beauty. Morning brings 4ft from the SW with a gentle 13-second period and light cross-offshore wind from the north. But the afternoon – wow. It goes glassy. Wind drops to 3 mph from the ENE, the sea turns to glass, and you’ve got 3ft of clean, peaky swell. This is a standout session. Calm, clean, easy.
Thursday the 27th morning is a bit of a mixed bag – 3ft but a huge 21-second period, so the sets will be fat and walled, with a strong 19 mph north wind. If you can handle that, you might find a gem. But the afternoon is where it’s at: 7ft from the SW, 19-second period, light offshore north wind, and the energy is cranking at 2831 (strong to very strong). This is for experienced surfers – quality waves.
Friday the 28th is the absolute pick of the forecast. Morning brings 8ft from the WSW, 16-second period, and it’s a clean, offshore flow from the NNE at only 3 mph. The energy is massive: 5032 (very strong). This is exceptional, expert-level surf. If you’ve got the skills, this is your day. The afternoon stays solid at 7ft, still clean and offshore.
Saturday the 29th and Sunday the 30th drop back in size – 3ft to 6ft, but the winds stay favourable. Sunday the 30th morning is especially nice: 3ft, 19-second period, and a proper offshore wind from the ENE. Clean, gentle, very good conditions.
The tail end of the window from the 31st of August through to the 6th of September is hit and miss. The 31st has some 5ft to 6ft SW swell with okay winds, but then it gets messy with onshore and cross-shore winds, lumpy conditions, and a lot of poor surf days. Early September the 2nd has a brief clean window with offshore wind, 4ft, but it’s not a standout. The rest is blown out or choppy.
So to sum up: your best bets are Wednesday the 26th afternoon for a glassy, easy session, and Friday the 28th morning for big, powerful, expert-only surf. Get out there.
Rusty.
Short Range ForecastLight rain (total 4mm), mostly falling on Sun night. Warm (max 20°C on Sun afternoon, min 14°C on Sat night). Winds increasing (light winds from the SSE on Sat afternoon, strong winds from the SSW by Mon afternoon). | Days 5-7 Weather SummarySome drizzle, heaviest during Fri morning. Warm (max 25°C on Thu afternoon, min 11°C on Tue night). Winds increasing (calm on Wed afternoon, fresh winds from the N by Thu morning). | |||||||||||||||||||
Sat 22 | Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | Friday 28 | ||||||||||||||
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 17 | SW 16 | SW 15 | SW 14 | SW 14 | SW 13 | SW 16 | SW 14 | SW 14 | SW 13 | SW 12 | SW 14 | SW 21 | SW 19 | SW 17 | WSW 16 | SW 16 | WSW 14 |
Wave Graph | ||||||||||||||||||||
936 | 924 | 1267 | 886 | 550 | 393 | 507 | 1242 | 1719 | 667 | 725 | 431 | 300 | 331 | 714 | 2831 | 1882 | 3024 | 2262 | 1126 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | off | cross-off | cross-off | cross-off | cross-on | cross-on | cross-on | cross-on | cross-on | glassy | cross-off | glassy | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off |
High Tide | 2:55AM0.66m | 11:50AM0.92m | 1:02AM0.62m | 11:40AM1.06m | 00:18AM0.68m | 11:50AM1.19m | 00:13AM0.78m | 12:06PM1.30m | 00:22AM0.89m | 12:24PM1.38m | 00:36AM1.00m | 12:43PM1.41m | 00:53AM1.09m | |||||||
Low Tide | 8:02PM0.28m | 5:37AM0.64m | 7:09PM0.28m | 5:03AM0.50m | 6:40PM0.23m | 5:15AM0.35m | 6:35PM0.15m | 5:35AM0.21m | 6:40PM0.08m | 5:57AM0.09m | 6:51PM0.02m | 6:21AM0.00m | 7:04PM-0.02m | |||||||
— | — | 7:05 | — | — | 7:05 | — | — | 7:03 | — | — | 7:03 | — | — | 7:01 | — | — | 7:01 | — | — | |
6:14 | — | — | 6:15 | — | — | 6:15 | — | — | 6:15 | — | — | 6:16 | — | — | 6:16 | — | — | 6:17 | — | |
mm | — | — | — | — | 2 | 1 | — | 1 | — | — | — | — | — | — | — | — | — | 1 | — | — |
Temp °C | 17 | 15 | 19 | 20 | 17 | 16 | 15 | 14 | 14 | 14 | 12 | 16 | 19 | 20 | 22 | 25 | 23 | 20 | 18 | 18 |
Feels °C | 14 | 12 | 14 | 15 | 13 | 13 | 9 | 8 | 9 | 10 | 10 | 13 | 16 | 16 | 16 | 21 | 18 | 17 | 16 | 18 |
Swell 1 Height (m) Direction Period (s) | SW 15 | SW 15 | SW 17 | SW 16 | SW 15 | SW 14 | — | — | — | SW 14 | SW 14 | SW 13 | SW 12 | SW 14 | SW 14 | SW 19 | SW 17 | WSW 16 | SW 16 | WSW 14 |
936 | 924 | 1267 | 886 | 550 | 393 | — | — | — | 667 | 725 | 431 | 300 | 331 | 407 | 2831 | 1882 | 3024 | 2262 | 1126 | |
Swell 2 Height (m) Direction Period (s) | SW 21 | SW 19 | — | — | — | SW 20 | — | — | — | — | — | — | SW 16 | SW 24 | SW 21 | — | — | — | — | — |
285 | 369 | — | — | — | 15 | — | — | — | — | — | — | 42 | 22 | 714 | — | — | — | — | — | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | — | ESE 3 | NE 3 | — | NE 3 | N 3 | SW 14 | SW 13 | SW 16 | SW 7 | — | NNE 2 | — | NE 3 | N 4 | — | W 4 | WSW 16 | WSW 16 | — |
— | 3 | 5 | — | 9 | 6 | 507 | 1242 | 1719 | 122 | — | 1 | — | 2 | 35 | — | 9 | 2008 | 1479 | — | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 0 | 0 | 178 | 1 | 1 | 489 | 243 | 491 | 1032 | 552 | 0 | 0 | 0 | 1 | 401 | 0 | 1 | 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.











