Flatrock Surf Break

Lat Long: 34.68° S 135.32° E

Flatrock Surf Forecast and Surf Report

Issued: 8 am 07 Aug 2026 (local time)

Forecast update in  hr  min

Today's Flatrock sea temperature is
15.2° C
0.0° 

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


Flatrock surf forecast from 7 Aug 2026:

  • Best quality surf: Monday 10 Aug, 6AM (local time) - 18ft (5.5m), 17s period, SW swell with cross-onshore winds.
  • Most powerful swell: Thursday 13 Aug, 12AM (local time) - 21ft (6.5m), 15s period, SW swell with 20,544 kJ wave energy.
  • Next surfable swell (1★+): Monday 10 Aug, 6AM (local time) - 18ft (5.5m), 17s period with SW swell.

Best Forecast Surf Conditions for Flatrock this week:

The surf forecast for Flatrock over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Monday (Aug 10) at 6AM. The primary swell is predicted to be 5.5m and 17s period with a secondary swell of 4.0m and 17s. The wind is predicted to be cross-onshore as the swell arrives.

The most powerful waves expected at Flatrock in the next 16 days are 6.5m 15s and forecast to arrive on Thursday (Aug 13) at 12AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.2m 6s period and expected on Sunday (Aug 09) at 6AM.

Wave TypeTime (ACST) & Date Wave Height & Period
Next good surf (1 star+) 6AM (Mon 10th Aug)18ft (5.5m) 17s
Best Surf 6AM (Mon 10th Aug)18ft (5.5m) 17s
Most Powerful12AM (Thu 13th Aug)21ft (6.5m) 15s

Table - best surf conditions forecast for Flatrock over the next 16 days.


The Lowdown

G’day, it’s Rusty here.

We’ve got a wild 16-day stretch coming up for Flatrock, so let’s break it down.

Right out of the gate, the first few days are a mess. Friday the 7th and Saturday the 8th are rideable but ugly – think 8ft of SW swell hitting a lumpy cross-chop. It’s not going to be pretty, and the energy numbers are weak to moderate, around 3709 to 2309. Not worth stressing about.

Then things get properly nasty. From Sunday the 9th through Wednesday the 12th, we’ve got gale-force winds and a building swell. This is full-blown blown-out chaos. Swell heights jump to 13ft and energy spikes into the thousands, but it’s all for nothing – completely unsurfable. If you’re a kite surfer, this is your window, but for paddle surfing, forget it.

Now, the first real standout of the window is Thursday the 13th. We see an 18ft SW swell pumping in with a 16 second period, and the energy is massive – 23373. But here’s the catch: the comment says it's too big for this reef break. This is expert-only territory, and even then, it’s a big ask.

After that, the surf settles down, but it’s still not ideal. Friday and Saturday the 14th and 15th bring some cleaner conditions. Saturday morning the 15th is a highlight – 12ft of SW with 16 seconds, and the wind is dead glassy. That’s the kind of session you dream about, even if it’s a bit heavy. The energy is 5540, which is strong, but the quality should be there.

Sunday the 16th drops off in size to 6-6ft, but it’s clean with cross-off winds. It’s a smaller, more user-friendly wave, good for experienced surfers.

There’s a lull around Monday the 17th, nothing special. But then Tuesday the 18th morning – that’s the second standout. 10ft of SW swell with a 17 second period, clean, and the wind is cross-off. Energy’s at 4491. This is a proper groundswell, point-break style. It’s going to be well-shaped and have some power.

The rest of that week stays rideable – Wednesday and Thursday the 19th and 20th are in the 8-10ft range, with clean conditions in the mornings and some lumpiness in the afternoons.

We end the second week strong. Friday the 21st is another cracker: 10ft with a 15-second period, moderate offshore wind in the morning, and then glassy in the afternoon. The energy is moderate to strong. The 22nd fades out with smaller, choppier surf.

So overall, we’ve got two true standouts: Saturday the 15th for the glassy, big-swell perfection, and Tuesday the 18th for a proper clean groundswell. The long-range stuff is promising but not as certain, so keep an eye on it. It’s an exposed reef, SW is the money direction, and the water temp is 59°, right around average for this time of year.

Take care out there.

Rusty

Short Range Forecast

Heavy rain (total 23mm), heaviest during Sun morning. Very mild (max 17°C on Fri afternoon, min 11°C on Sun morning). Winds increasing (moderate winds from the NNW on Fri afternoon, gales from the SW by Sun afternoon).

Days 4-6 Weather Summary

Moderate rain (total 15mm), heaviest on Tue afternoon. Very mild (max 15°C on Tue morning, min 11°C on Tue night). Winds decreasing (near gales from the WNW on Tue afternoon, moderate 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
Rating
(10 max)
2
3
1
2
0
0
0
0
0
0
0
0
0
0
0
0
0
!
!
0
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
2.5
SW
16
2.5
SW
17
2.3
SW
16
2.4
SW
16
2.3
SW
15
2
SW
14
4
SW
16
4
SW
15
4
SW
18
4
SW
17
3.5
SW
16
3
SW
16
3
WSW
14
3.5
WSW
10
4
SW
17
4
SW
19
4
SW
16
6.5
SW
15
5.5
SW
16
3.5
SW
16
3
SW
15
Wave Graph
Metric surfscale
Energy kJ
3678
3597
2676
2768
2309
1580
6849
6834
10814
8307
6394
4645
3224
2216
9209
11907
8990
20544
15675
6604
4334
Wind (km/h)
30
N
20
NNW
30
N
20
N
30
NNW
35
N
65
WSW
65
SW
45
SW
30
W
25
NW
35
NNW
50
N
55
WNW
50
WSW
50
W
45
WSW
25
SW
25
WSW
20
WNW
25
W
Wind State
cross
cross
cross
cross
cross-on
cross
cross-on
cross-on
cross-on
on
cross-on
cross-on
cross
cross-on
on
on
cross-on
cross-on
on
on
on
High Tide
10:26AM0.43m
11:28AM0.50m
12:06PM0.56m
1:39AM0.14m
12:38PM0.60m
1:07AM0.18m
1:05PM0.60m
1:06AM0.23m
1:27PM0.58m
1:18AM0.29m
Low Tide
9:16PM0.04m
8:51PM0.03m
8:33PM0.03m
8:25PM0.03m
4:35AM0.12m
8:22PM0.05m
5:35AM0.07m
8:19PM0.08m
6:18AM0.04m
8:14PM0.09m
cloud
cloud
part cloud
part cloud
rain showers
rain showers
mod rain
light rain
cloud
part cloud
part cloud
rain showers
part cloud
mod rain
light rain
rain showers
rain showers
cloud
cloud
cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:18
7:16
7:16
7:15
7:13
7:13
7:11
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:51
5:52
5:52
5:52
5:53
5:54
5:54
 mm
2
7
9
5
2
7
3
2
1
Temp °C
14
17
14
16
17
14
12
12
13
13
14
14
15
12
13
14
14
13
14
14
15
Feels °C
8
12
9
12
11
7
0
-1
1
7
8
8
4
1
2
4
5
5
9
9
11
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
Map placeholder
How to use the Wavefinder 
submit an eyeball surf report

Quick surf report for Flatrock:

join our community of surf reporters

FREE! Surf-Forecast.com widget for your website

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 16 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.

Nearest locationNearest