
Surf Forecasts:
Cactus surf forecast from 20 Jul 2026:
- Best quality surf: Friday 24 Jul, 3AM (local time) - 6ft (1.8m), 15s period, SW swell with cross-offshore winds.
- Most powerful swell: Thursday 23 Jul, 3PM (local time) - 6.5ft (2.0m), 15s period, SW swell with 1,715 kJ wave energy.
- Next surfable swell (1★+): Monday 20 Jul, 6PM (local time) - 4.5ft (1.3m), 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 (Jul 20) at 6PM. The primary swell is predicted to be 1.3m and 14s 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 2.0m 15s and forecast to arrive on Thursday (Jul 23) at 3PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.3m 2s period and expected on Monday (Jul 27) at 9AM.
| Wave Type | Time (ACST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6PM (Mon 20th Jul) | 4.5ft (1.3m) 14s |
| Best Surf | 3AM (Fri 24th Jul) | 6ft (1.8m) 15s |
| Most Powerful | 3PM (Thu 23rd Jul) | 6.5ft (2.0m) 15s |
Table - best surf conditions forecast for Cactus over the next 16 days.
The Lowdown
Alright, surfers, Rusty here. Let’s get into it. We’ve got a solid-looking run of groundswell on the way for Cactus, a classic reef break, but it’s not all clean sailing. The water is sitting at 61°, which is pretty much normal for this time of year, so no surprises there.
The overall pattern starts off a bit messy. Monday the 20th and Tuesday the 21st are a write-off with onshore and cross-shore winds messing up the 4ft to 4ft SW swell. Don’t bother paddling out; it’s a waste of energy. Wednesday the 22nd is even worse, with a building onshore breeze and a poor 2ft swell. Thursday the 23rd sees the swell jump up to 7ft from the SW, but it’s still cross-shore and lumpy, so it’s not a goer.
Now, here’s where it gets interesting. Friday morning, July 24th is your first real standout. The swell is a solid 6ft from the SW, with a period of 15 seconds—that’s proper groundswell. The wind goes glassy offshore from the east, and the wave energy is pumping at a strong 1212. The report says excellent conditions for experienced surfers, and that’s the truth. This reef is exposed to the SW, so it’s going to be handling this energy beautifully. Expect clean, lined-up waves. If you can handle the size, this is the session to aim for.
The weekend slides back into mediocrity with cross-onshore winds and dropping swell, but Tuesday morning, July 28th is a sneaky good one. The swell drops to 3ft from the SW, but the wind is completely glassy. Period is a very long 17 seconds, which will give the reef some real shape. It’s a smaller, cleaner window for the longboard or a fun mid-length.
The real fireworks, though, are locked in for Wednesday afternoon, July 29th. The swell is a solid 6ft from the SW, period at 15 seconds, and the wind is glassy. The combined energy is a massive 2610, signaling strong wave power. The forecast says excellent conditions for experienced surfers. This is the best on offer across the whole forecast. The reef will be holding that long-period swell perfectly, delivering powerful, well-shaped waves. Get on it.
After that, from Thursday the 30th through to the end, the swell stays big—7ft to 10ft from the SW/SSW—but the wind gets messy again. The morning of Saturday, August 1st, has a clean 8ft SW swell (2676 energy) with a cross-off wind, but it’s expert territory at that size. The 8ft to 10ft stuff on Sunday and Monday is hammered by onshore and cross-onshore winds, making it a total mess. The big swell in the second week is promising for power, but the wind windows are narrow. The crowd factor at Cactus can be a “sometimes” thing, so on those clean days, you might have to share.
Stay sharp, and don’t miss that Wednesday afternoon glass-off.
Rusty.
Short Range ForecastLight rain (total 2mm), mostly falling on Wed morning. Very mild (max 19°C on Mon afternoon, min 12°C on Wed night). Winds increasing (light winds from the ENE on Mon afternoon, fresh winds from the SSW by Wed afternoon). | Days 4-6 Weather SummaryMostly dry. Very mild (max 13°C on Thu morning, min 11°C on Thu night). Wind will be generally light. | ||||||||||||||||||||
Monday 20 | Tuesday 21 | Wednesday 22 | Thursday 23 | Friday 24 | Saturday 25 | Sunday 26 | |||||||||||||||
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 14 | SW 13 | SW 13 | SW 12 | SW 14 | SW 14 | SW 14 | SW 14 | SW 15 | SW 15 | SW 15 | SW 14 | SW 14 | SW 13 | SW 13 | SW 12 | SW 12 | SW 12 | SW 12 |
Wave Graph | |||||||||||||||||||||
566 | 623 | 595 | 431 | 357 | 240 | 121 | 722 | 1203 | 1559 | 1715 | 1650 | 1212 | 992 | 821 | 651 | 543 | 494 | 409 | 309 | 259 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross | cross-off | cross | on | cross-on | on | cross-on | cross | cross | cross | cross-off | off | cross | cross | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on |
High Tide | 2:26PM1.04m | 3:13AM0.90m | 2:35PM0.96m | 3:48AM0.86m | 2:35PM0.87m | 4:33AM0.79m | 2:02PM0.79m | 11:56AM0.81m | 11:20AM0.94m | 00:21AM0.53m | 11:34AM1.07m | 00:05AM0.60m | |||||||||
Low Tide | 8:56PM0.16m | 8:45AM0.42m | 9:13PM0.18m | 9:06AM0.53m | 9:29PM0.23m | 9:12AM0.65m | 9:34PM0.31m | 8:49PM0.38m | 7:15PM0.37m | 4:11AM0.45m | 6:49PM0.30m | ||||||||||
7:35 | — | — | 7:33 | — | — | 7:33 | — | — | 7:33 | — | — | 7:33 | — | — | 7:31 | — | — | 7:31 | — | — | |
— | 5:52 | — | — | 5:53 | — | — | 5:54 | — | — | 5:54 | — | — | 5:55 | — | — | 5:55 | — | — | 5:57 | — | |
mm | — | — | — | — | — | — | 1 | — | 1 | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 17 | 19 | 19 | 17 | 17 | 16 | 14 | 14 | 14 | 13 | 13 | 13 | 12 | 13 | 13 | 12 | 13 | 13 | 14 | 14 | 14 |
Feels °C | 12 | 16 | 15 | 13 | 14 | 13 | 11 | 8 | 10 | 7 | 7 | 7 | 9 | 9 | 9 | 9 | 8 | 11 | 12 | 11 | 11 |
Swell 1 Height (m) Direction Period (s) | SW 15 | SW 15 | SW 14 | SW 13 | SW 13 | SW 12 | SW 11 | — | — | SW 14 | SW 15 | SW 15 | SW 15 | SW 14 | SW 14 | SW 13 | SW 13 | SW 12 | SW 12 | SW 12 | SW 12 |
566 | 623 | 595 | 431 | 357 | 240 | 96 | — | — | 1559 | 1715 | 1650 | 1212 | 992 | 821 | 651 | 543 | 494 | 409 | 309 | 259 | |
Swell 2 Height (m) Direction Period (s) | S 10 | — | — | S 9 | — | — | SW 14 | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
2 | — | — | 2 | — | — | 121 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | NNW 3 | — | — | NNW 2 | — | SW 12 | SW 4 | SW 14 | SW 14 | SSW 14 | SW 15 | SSW 15 | — | — | — | — | SW 13 | — | — | — | — |
7 | — | — | 1 | — | 23 | 9 | 722 | 1203 | 81 | 57 | 93 | — | — | — | — | 44 | — | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 178 | 1 | 1 | 1 | 178 | 510 | 1227 | 1236 | 1045 | 491 | 552 | 132 | 0 | 0 | 0 | 940 | 1035 | 649 | 1061 | 940 | 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.










