Cactus Surf Forecast

/ SA – Nullarbor (9 breaks) / South Australia (91 breaks) /

Australia (828 breaks)

Surf Forecasts:

Cactus surfForecast / SA – Nullarbor / Australia

12 Day Weather and Surf, issued 2 pm Tuesday 16 Sep 2025 ACST

Forecast update in hr min s Forecast update imminent

Cactus surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.

Today's Cactus sea temperature is 15.8° C
(Which is normal for this time of year)

Best Forecast Surf Conditions for Cactus this week:

The surf forecast for Cactus over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Wednesday (Sep 17) at 6AM. The primary swell is predicted to be 2.0m and 15s period. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Cactus in the next 12 days are 2.5m 14s and forecast to arrive on Saturday (Sep 20) at 9AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 3s period and expected on Thursday (Sep 18) at 9AM.

Wave Type	Time (ACST) & Date	Wave Height & Period
Next good surf (1 star+)	6AM (Wed 17th Sep)	6.5ft (2.0m) 15s
Best Surf	6AM (Wed 17th Sep)	6.5ft (2.0m) 15s
Most Powerful	9AM (Sat 20th Sep)	8ft (2.5m) 14s

Table - best surf conditions forecast for Cactus over the next 12 days.

Updates in hr min s Forecast update imminent

12 Days Hourly

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	Short Range Forecast Mostly dry. Warm (max 25°C on Thu morning, min 13°C on Tue night). Winds increasing (calm on Tue night, fresh winds from the WSW by Fri morning).											Days 3-6 Weather Summary Mostly dry. Very mild (max 16°C on Fri afternoon, min 12°C on Sat night). Winds decreasing (fresh winds from the WSW on Fri afternoon, light winds from the SW by Sat night).
	Tue 16		Wednesday 17			Thursday 18			Friday 19			Saturday 20			Sunday 21			Monday 22
	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM
Rating (10 max)	0	2	4	2	3	0	0	1	0	0	0	0	0	2	1	0	1	0	0	1	1
Swell Height Map See all maps
Wave Height (m) & direction (?)	SW	SW	SW	SW	SW	SW	SW	SW	SW	SW	SW	SW	SW	SW	SW	SW	SW	SW	SW	SSW	SW
Period(s) (?)	16	16	14	14	13	12	12	12	12	14	14	14	14	14	14	13	13	14	13	12	14
Wave Graph (?)
Energy (?)	2578	2040	1484	1201	633	272	355	365	581	1267	1728	4446	1516	1388	891	757	1703	957	1007	1055	1370
Wind (km/h)	WSW	SW	N	SW	ENE	N	SW	SSW	W	WSW	SSW	SSW	SW	SW	SW	SW	SSW	SSW	SSW	S	SSW
Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy	on	cross- on	cross- off	cross- on	off	cross- off	cross- on	cross- on	cross- on	on	cross- on	cross- on	cross- on	cross- on	on	on	cross- on	cross- on	cross- on	cross- on	cross- on
High Tide / height (m)		1:48AM 0.74	11:58AM 1.03		12:54AM 0.72	11:52AM 1.10		12:21AM 0.79	11:55AM 1.17		12:12AM 0.91	12:04PM 1.21		12:16AM 1.04	12:16PM 1.24		12:27AM 1.16	12:29PM 1.24		12:41AM 1.26
Low Tide / height (m)		7:20PM 0.13	6:03AM 0.56		6:56PM 0.17	5:38AM 0.43		6:34PM 0.17	5:38AM 0.30	6:23PM 0.13		5:50AM 0.18	6:22PM 0.08		6:07AM 0.08	6:27PM 0.02		6:25AM 0.02		6:35PM -0.03	6:44AM -0.01

	Tue 16		Wednesday 17			Thursday 18			Friday 19			Saturday 20			Sunday 21			Monday 22
Sunrise	-	-	6:35	-	-	6:33	-	-	6:31	-	-	6:31	-	-	6:30	-	-	6:28	-	-	6:26
Sunset	6:30	-	-	6:30	-	-	6:30	-	-	6:30	-	-	6:31	-	-	6:32	-	-	6:32	-	-

Rain (mm)	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-
Temp. °C	14	14	17	18	18	25	20	16	16	16	15	13	13	13	15	16	15	16	15	14	14
Feels °C (?)	8	10	14	14	12	20	14	14	10	9	11	8	8	9	11	12	11	11	10	11	12

Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)
Wind Speed (km/h)

Recent Eyeball Surf Reports for SA - Nullarbor

Wind Update Wind reports 63 km away suggest it is still onshore at Cactus (light winds from the WSW at Thevenard Ntc Aws). A 1.8m long period groundswell from the SW
1 hour 7 minutes ago Cactus

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The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Cactus surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.

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 12 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.