Surf Forecasts:
Cactus surf forecast from 13 Aug 2026:
- Best quality surf: Thursday 13 Aug, 9PM (local time) - 7ft (2.1m), 15s period, SW swell with glassy winds.
- Most powerful swell: Friday 14 Aug, 6AM (local time) - 7ft (2.1m), 17s period, SW swell with 2,442 kJ wave energy.
- Next surfable swell (1★+): Thursday 13 Aug, 9PM (local time) - 7ft (2.1m), 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 Thursday (Aug 13) at 9PM. The primary swell is predicted to be 2.1m and 15s period. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Cactus in the next 16 days are 2.1m 17s and forecast to arrive on Friday (Aug 14) at 6AM. Winds are predicted to be glassy 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 18) at 9AM.
| Wave Type | Time (ACST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9PM (Thu 13th Aug) | 7ft (2.1m) 15s |
| Best Surf | 9PM (Thu 13th Aug) | 7ft (2.1m) 15s |
| Most Powerful | 6AM (Fri 14th Aug) | 7ft (2.1m) 17s |
Table - best surf conditions forecast for Cactus over the next 16 days.
The Lowdown
Alright, let's get into it. Rusty here, and Cactus is the spot we're looking at. It's a reef that likes a solid southwest swell, breaks fairly consistently, and handles the energy well. The water is sitting right around 60 degrees, which is pretty much normal for this time of year, nothing too unusual.
The run starts Thursday the 13th of August. There's a decent south-west swell in the water, about 7 feet, with a long 15-second period. You've got a heap of energy behind it – 2136 on the scale. But the wind is a light cross-on from the south-southwest, just 6 mph, so there's a bit of texture on the face. It's okay, nothing special. Friday the 14th of August morning is where we clean up. Same 7-foot SW groundswell, 16-second period, but the wind switches to a light cross-off from the southeast at 3 mph. The water goes clean. The energy bumps up to 2193. That's the first standout session for the experienced crew.
The swell drops a bit over the weekend. Saturday the 15th morning has 6 feet of SW groundswell, 16-second period, with a moderate offshore wind from the east keeping things clean. Energy is 1392. Sunday the 16th morning gets a lovely light offshore breeze from the east-northeast at 6 mph, with 4-foot swell and a 14-second period. It's clean and glassy, energy at 659. Good fun for the intermediate surfer.
Monday the 17th morning is small but clean, with a 3-foot, 16-second SW groundswell and a moderate offshore wind from the east-northeast at 12 mph. Energy is 682. The afternoon picks up a bit. Tuesday the 18th and Wednesday the 19th are a write-off with strong onshore winds and messy conditions.
Moving into the second week, Thursday the 20th of August morning looks excellent with a light offshore breeze from the east-northeast at 3 mph. The swell is 5 feet from the SW, 16-second period, and the energy climbs back to 1001. Very clean.
Friday the 21st of August morning is another good one. Clear, a light cross-off from the north, and a 5-foot SW groundswell with a 16-second period. Energy is 1284.
Now, circle Saturday the 22nd of August morning. The wind goes dead calm from the south, glassy as it gets. And the swell is a solid 10 feet from the southwest, with a 12-second period. The energy is massive, 2507. This is strictly for experts. The reef will handle it, but this is big and powerful. That's the second standout of the whole two weeks.
Sunday the 23rd morning is still pumping with a clean 7-foot SW groundswell and a 15-second period. Energy at 1692. Light cross-off breeze. The onshore wind messes up the afternoon. Monday the 24th is windy and choppy, and Tuesday the 25th has a 8-foot swell but it's bumpy and onshore, energy at 2700, frustrating. The rest of that week is mostly blown out by strong westerly winds.
The final note is Friday the 28th of August morning. This is a long-range look, so it's promising but not locked in. It shows a clean 6-foot SW groundswell with a very long 19-second period and a light cross-off breeze. Energy is 2503. Long period like that means long gaps between sets, but the waves will be thick and powerful, perfect for this reef. Get that one on the radar.
Best windows: Friday the 14th morning for the clean, powerful start, and Saturday the 22nd morning for the big, glassy, expert-level swell. Cactus is the place to be.
- Rusty
Short Range ForecastMostly dry. Very mild (max 17°C on Sat afternoon, min 14°C on Thu afternoon). Wind will be generally light. | Days 5-7 Weather SummarySome drizzle, heaviest during Tue afternoon. Very mild (max 18°C on Tue morning, min 13°C on Mon morning). Mainly fresh winds. | |||||||||||||||||||
Thu 13 | Friday 14 | Saturday 15 | Sunday 16 | Monday 17 | Tuesday 18 | Wednesday 19 | ||||||||||||||
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 16 | SW 16 | SW 16 | SW 16 | SW 16 | SW 15 | SW 14 | SW 14 | SW 14 | SW 16 | SW 16 | SW 20 | SW 18 | SW 17 | SW 16 | SW 15 | SW 15 | SW 14 |
Wave Graph | ||||||||||||||||||||
2075 | 2075 | 2193 | 2166 | 1832 | 1392 | 1265 | 836 | 659 | 581 | 434 | 310 | 611 | 373 | 694 | 493 | 437 | 459 | 435 | 676 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | glassy | cross-off | cross | cross-off | cross-off | cross-off | off | off | cross-off | off | off | cross-off | off | cross-off | cross-off | cross-on | cross-on | cross-on | cross-off |
High Tide | 1:08AM0.91m | 1:19PM1.30m | 1:22AM1.00m | 1:29PM1.24m | 1:39AM1.08m | 1:39PM1.18m | 1:58AM1.12m | 1:49PM1.13m | 2:19AM1.13m | 1:59PM1.07m | 2:40AM1.10m | 2:07PM0.99m | 3:00AM1.03m | |||||||
Low Tide | 7:34PM0.13m | 6:52AM0.05m | 7:37PM0.11m | 7:13AM0.06m | 7:42PM0.07m | 7:34AM0.10m | 7:51PM0.03m | 7:53AM0.16m | 8:02PM0.01m | 8:12AM0.23m | 8:15PM0.01m | 8:30AM0.33m | 8:28PM0.06m | |||||||
— | — | 7:16 | — | — | 7:15 | — | — | 7:13 | — | — | 7:13 | — | — | 7:11 | — | — | 7:11 | — | — | |
6:08 | — | — | 6:08 | — | — | 6:09 | — | — | 6:09 | — | — | 6:10 | — | — | 6:12 | — | — | 6:12 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | — | — | — | — |
Temp °C | 15 | 15 | 15 | 15 | 15 | 16 | 17 | 15 | 16 | 16 | 15 | 16 | 17 | 16 | 18 | 18 | 14 | 15 | 15 | 14 |
Feels °C | 12 | 13 | 12 | 10 | 10 | 12 | 13 | 11 | 13 | 12 | 10 | 12 | 13 | 11 | 9 | 11 | 11 | 12 | 12 | 12 |
Swell 1 Height (m) Direction Period (s) | SW 15 | SW 15 | SW 16 | SW 16 | SW 16 | SW 16 | SW 16 | SW 15 | SW 14 | SW 14 | SW 14 | SW 13 | SW 16 | SW 15 | SW 18 | SW 17 | SW 16 | SW 15 | SW 15 | SW 14 |
2075 | 2075 | 2193 | 2166 | 1832 | 1392 | 1265 | 836 | 659 | 581 | 434 | 286 | 611 | 355 | 694 | 493 | 437 | 459 | 435 | 676 | |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | ESE 4 | — | — | SW 16 | SW 22 | SW 20 | — | S 10 | — | — | WSW 7 | SW 18 |
— | — | — | — | — | — | — | — | 3 | — | — | 310 | 163 | 373 | — | 2 | — | — | 70 | 258 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | SW 23 | S 10 | SSE 4 | — | — | — | — | SW 20 | — |
— | — | — | — | — | — | — | — | — | — | — | 86 | 46 | 1 | — | — | — | — | 99 | — | |
Wind waves Height (m) Direction Period (s) | SW 16 | — | — | — | — | ESE 3 | E 3 | E 3 | — | SE 2 | SE 4 | — | — | NE 3 | NNE 4 | NNW 4 | NW 4 | WSW 5 | SW 15 | — |
61 | — | — | — | — | 4 | 3 | 1 | — | 1 | 11 | — | — | 3 | 28 | 29 | 16 | 46 | 79 | — | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 1219 | 0 | 0 | 153 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 651 | 651 | 651 | 510 | 510 | 0 |
Best forecast wave conditions in Nullarbor | ||||||||||||||||||||
Best forecast wave conditions in Australia | ||||||||||||||||||||
Header Global | ||||||||||||||||||||
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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.











