Flatrock Surf Forecast

/ SA – Eyre Peninsula (19 breaks) / South Australia (91 breaks) /

Australia (828 breaks)

Surf Forecasts:

Flatrock surfForecast / SA – Eyre Peninsula / Australia

12 Day Weather and Surf, issued 8 am Thursday 18 Sep 2025 ACST

Forecast update in hr min s Forecast update imminent

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

Today's Flatrock sea temperature is 15.0° C
(Which is normal for this time of year)

Best Forecast Surf Conditions for Flatrock this week:

The surf forecast for Flatrock over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Sep 23) at 12AM. The primary swell is predicted to be 3.0m and 14s period with a secondary swell of 0.9m and 21s. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Flatrock in the next 12 days are 5.0m 14s and forecast to arrive on Saturday (Sep 20) at 3AM. Winds are predicted to be cross-onshore at the time the swell arrives.

Wave Type	Time (ACST) & Date	Wave Height & Period
Next good surf (1 star+)	12AM (Tue 23rd Sep)	10ft (3.0m) 14s
Best Surf	12AM (Tue 23rd Sep)	10ft (3.0m) 14s
Most Powerful	3AM (Sat 20th Sep)	16ft (5.0m) 14s

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

Updates in hr min s Forecast update imminent

12 Days Hourly

Print Table

	Short Range Forecast Some drizzle, heaviest during Fri afternoon. Very mild (max 18°C on Thu morning, min 12°C on Fri night). Winds increasing (light winds from the WSW on Thu night, strong winds from the W by Fri afternoon).									Days 3-6 Weather Summary Mostly dry. Very mild (max 14°C on Sun morning, min 10°C on Mon night). Wind will be generally light.
	Thursday 18			Friday 19			Saturday 20			Sunday 21			Monday 22			Tuesday 23			Wednesday 24
	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night
Rating (10 max)	0	0	2	0	0	0	0	0	0	0	0	2	2	3	5	4	2	2	2	1	4
Swell Height Map See all maps
Wave Height (m) & direction (?)	SW	SW	SW	SW	WSW	SW	SW	SW	SW	SW	SW	SW	SSW	SSW	SSW	SSW	SW	SW	SW	SW	SW
Period(s) (?)	12	12	12	12	11	14	14	13	14	13	13	13	13	15	14	14	19	17	17	16	16
Wave Graph (?)
kJ (?)	698	747	855	812	2416	5842	6875	5929	4873	3677	3264	2744	1944	4002	3009	2180	1864	3538	2728	2413	3219
Wind (km/h)	N	WNW	WSW	WNW	W	SW	SW	WSW	W	WSW	WSW	SW	S	S	SSE	SSW	SW	SSW	SW	SW	WSW
Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy	cross	cross- on	on	on	on	cross- on	cross- on	on	on	on	cross- on	cross- on	cross	cross	cross- off	cross- on	cross- on	cross- on	cross- on	cross- on	cross- on
High Tide / height (m)	11:55AM 0.48		12:44AM 0.25	12:08PM 0.50		12:25AM 0.31	12:22PM 0.50		12:28AM 0.37		12:36PM 0.49	12:41AM 0.44		12:50PM 0.47	12:58AM 0.49		1:03PM 0.45	1:16AM 0.54		1:15PM 0.42	1:36AM 0.56
Low Tide / height (m)			7:15PM 0.08	5:20AM 0.14		6:56PM 0.08	5:49AM 0.09		6:48PM 0.07	6:16AM 0.05		6:47PM 0.05	6:43AM 0.03		6:51PM 0.03	7:07AM 0.02		6:58PM 0.01	7:31AM 0.03		7:07PM -0.01

	Thursday 18			Friday 19			Saturday 20			Sunday 21			Monday 22			Tuesday 23			Wednesday 24
Sunrise	6:24	-	-	6:22	-	-	6:22	-	-	6:20	-	-	6:18	-	-	6:18	-	-	6:16	-	-
Sunset	-	6:21	-	-	6:22	-	-	6:22	-	-	6:22	-	-	6:23	-	-	6:24	-	-	6:24	-

Rain (mm)	-	-	-	-	1	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-
Temp. °C	18	17	14	14	14	13	12	13	14	14	14	14	13	12	11	12	12	13	13	13	12
Feels °C (?)	10	10	12	6	5	5	6	6	9	9	9	10	9	7	7	9	9	10	10	10	10

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 - Eyre Peninsula

Wind Update The wind is still cross-on at Flatrock (fresh winds from the NNW at Port Lincoln 52 km from Flatrock). 1.4m 13s groundswell from the SW with a 0.9m 11s groundswell from the SSW. 2 swells combining to make bigger set waves.
1 hour 29 minutes ago Flatrock

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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 Flatrock 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 Flatrock Surf forecast

The above surf forecast table for Flatrock provides essential information for determining whether the surfing conditions will be good over the next 12 days. A general guide to surfing at Flatrock can be found by selecting the local surf guide option on the grey menu. Our Flatrock 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 (Flatrock) 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 Flatrock 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 Eyre Peninsula? If you are looking for accommodation near Flatrock, camping, hotels and holiday cottages in Eyre Peninsula, consider staying in Port Lincoln which is 49 km (30 miles) away.