
Surf Forecasts:
Cactus surf forecast from 7 Aug 2026:
- Best quality surf: Friday 7 Aug, 9PM (local time) - 5ft (1.5m), 17s period, SW swell with offshore winds.
- Most powerful swell: Thursday 13 Aug, 6AM (local time) - 11ft (3.5m), 16s period, SW swell with 6,647 kJ wave energy.
- Next surfable swell (1★+): Friday 7 Aug, 9PM (local time) - 5ft (1.5m), 17s 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 (Aug 07) at 9PM. The primary swell is predicted to be 1.5m and 17s period. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Cactus in the next 16 days are 3.5m 16s and forecast to arrive on Thursday (Aug 13) at 6AM. 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 (Aug 11) at 3AM.
| Wave Type | Time (ACST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9PM (Fri 7th Aug) | 5ft (1.5m) 17s |
| Best Surf | 9PM (Fri 7th Aug) | 5ft (1.5m) 17s |
| Most Powerful | 6AM (Thu 13th Aug) | 11ft (3.5m) 16s |
Table - best surf conditions forecast for Cactus over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s take a look at what’s coming our way.
First off, we’ve got a bit of a rough patch to get through. The early part of this run is not looking good at all. There’s a solid swell coming in from the southwest, but it’s being hammered by strong winds, making things blown out and messy. From Friday the 9th right through to the end of the second week, it’s a real mixed bag, with a lot of onshore wind and poor quality. The waves are there, but the conditions are a battle for most of it.
Let’s talk about Cactus. This is a reef break, intermediate level, exposed to the southwest swell. The water temp is sitting at 60°F, which is about average for this time of year, so nothing unusual there.
The first real window we get is on the morning of Saturday the 15th of August. This is the standout. We’ve got a clean 6 ft swell from the southwest with a 16-second period – that’s proper groundswell, long lines. The wind is offshore from the east-northeast at 9 mph, and the combined swell energy is solid at 1654. This is the one to circle. It’s going to be clean, powerful, and really fun for intermediate surfers. The long period might make it a bit straight at the beach, but at a reef, it should be excellent. Crowds are sometimes an issue here, so keep that in mind.
After that, the following afternoon on Sunday the 16th of August, we get a glassy session. Wind is dead calm, zero mph, with a 4 ft swell from the southwest. The period is 15 seconds, so still some good energy (combined energy 545), but it’s much smaller. It’s a great option for a longboard or a cruiser board when you just want to enjoy the conditions.
There’s a bit of a lull through the middle of the week, with some cross-offshore winds and clean faces on the 18th of August (Tuesday), but the swell is inconsistent and a bit small, with 4 ft to 5 ft waves. It’s surfable, but not the main event.
Towards the very end of the run, on Friday the 22nd of August, the swell picks up again, but the wind swings onshore from the west-southwest, blowing it out. It’s a shame because there’s plenty of size, but the quality just isn’t there for paddling.
The bottom line: The clear winner here is the Saturday the 15th of August morning at Cactus. That offshore wind with a clean, solid southwest swell is your best bet. After that, the Sunday afternoon glass-off is the next best thing for a fun, relaxed session.
Stay sharp, and don’t sleep on that 15th.
Rusty
Short Range ForecastHeavy rain (total 24mm), heaviest during Sat night. Very mild (max 18°C on Fri morning, min 11°C on Sat night). Winds increasing (moderate winds from the NNE on Fri afternoon, near gales from the W by Sun morning). | Days 4-6 Weather SummaryLight rain (total 8mm), mostly falling on Tue night. Very mild (max 19°C on Tue morning, min 11°C on Tue afternoon). Winds decreasing (near gales from the W on Tue afternoon, light winds from the WSW by Wed night). | ||||||||||||||||||||
Friday 7 | Saturday 8 | Sunday 9 | Monday 10 | Tuesday 11 | Wednesday 12 | Thursday 13 | |||||||||||||||
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 16 | SW 17 | SW 16 | SW 16 | SW 15 | WSW 14 | WSW 10 | WSW 12 | SW 17 | SW 17 | SW 16 | SW 16 | SW 14 | WSW 9 | WSW 11 | WSW 17 | SW 17 | SW 16 | SW 16 | SW 16 | SW 14 |
Wave Graph | |||||||||||||||||||||
1256 | 1267 | 1039 | 1074 | 953 | 1614 | 1849 | 2676 | 5064 | 3597 | 2643 | 1384 | 590 | 1245 | 2331 | 4876 | 5006 | 3868 | 3438 | 2963 | 1736 | |
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 | cross-on | on | on | on | cross-on | cross-on | cross-off | cross-off | cross-on | on | on | on | cross-on | on | on | cross-on |
High Tide | 12:11PM0.76m | 11:17AM0.96m | 2:07AM0.58m | 11:38AM1.14m | 1:00AM0.58m | 12:03PM1.28m | 00:48AM0.63m | 12:27PM1.36m | 00:49AM0.71m | 12:48PM1.38m | 00:57AM0.80m | 1:06PM1.36m | 1:08AM0.91m | ||||||||
Low Tide | 8:14PM0.26m | 7:25PM0.20m | 4:19AM0.56m | 7:12PM0.14m | 5:06AM0.41m | 7:16PM0.11m | 5:37AM0.27m | 7:23PM0.11m | 6:04AM0.16m | 7:30PM0.12m | 6:29AM0.08m | 7:34PM0.13m | |||||||||
7:22 | — | — | 7:22 | — | — | 7:20 | — | — | 7:20 | — | — | 7:18 | — | — | 7:18 | — | — | 7:16 | — | — | |
— | 6:05 | — | — | 6:05 | — | — | 6:06 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:08 | — | |
mm | 1 | 2 | 3 | — | 1 | 12 | 3 | 2 | — | — | — | — | — | 1 | 7 | — | — | — | — | — | — |
Temp °C | 18 | 15 | 16 | 18 | 18 | 15 | 13 | 13 | 13 | 15 | 16 | 15 | 19 | 14 | 14 | 14 | 15 | 14 | 15 | 15 | 16 |
Feels °C | 13 | 11 | 11 | 14 | 14 | 10 | 1 | 2 | 3 | 10 | 11 | 10 | 8 | 3 | 5 | 6 | 7 | 8 | 11 | 11 | 13 |
Swell 1 Height (m) Direction Period (s) | SW 16 | SW 17 | SW 16 | SW 16 | SW 15 | — | — | — | — | SW 17 | SW 16 | SW 16 | SW 14 | — | — | — | — | — | SW 16 | SW 16 | SW 14 |
1256 | 1267 | 1039 | 1074 | 953 | — | — | — | — | 3597 | 2643 | 1384 | 590 | — | — | — | — | — | 3438 | 2963 | 1736 | |
Swell 2 Height (m) Direction Period (s) | — | WNW 5 | — | — | — | — | — | — | — | — | — | — | W 6 | — | — | — | — | — | — | — | — |
— | 8 | — | — | — | — | — | — | — | — | — | — | 1 | — | — | — | — | — | — | — | — | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | N 4 | N 4 | NNW 4 | WNW 2 | — | WSW 14 | WSW 10 | WSW 12 | SW 17 | SW 17 | SW 16 | NNW 4 | NW 5 | WSW 9 | WSW 11 | WSW 17 | SW 17 | SW 16 | SW 16 | SW 16 | SW 15 |
20 | 8 | 7 | 1 | — | 1614 | 1849 | 2676 | 5064 | 73 | 68 | 15 | 91 | 1245 | 2331 | 4876 | 5006 | 3868 | 65 | 64 | 75 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 401 | 1 | 401 | 564 | 500 | 564 | 649 | 878 | 1093 | 1361 | 510 | 553 | 1149 | 1510 | 1567 | 1567 | 1344 | 1217 | 1242 | 1236 | 1 |
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.











