Flatrock Surf Break

Lat Long: 34.68° S 135.32° E

Flatrock Surf Forecast and Surf Report

Issued: 2 am 09 Aug 2026 (local time)

Forecast update in  hr  min

Today's Flatrock sea temperature is
15.1° 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 9 Aug 2026:

  • Best quality surf: Sunday 9 Aug, 9PM (local time) - 15ft (4.5m), 19s period, SW swell with cross-onshore winds.
  • Most powerful swell: Monday 10 Aug, 9AM (local time) - 16ft (5.0m), 17s period, SW swell with 14,444 kJ wave energy.
  • Next surfable swell (1★+): Sunday 9 Aug, 12PM (local time) - 7.5ft (2.3m), 16s 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 Sunday (Aug 09) at 12PM. The primary swell is predicted to be 2.3m and 16s period with a secondary swell of 0.7m and 5s. Another secondary swell of 0.8m and 5s is also forecast. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Flatrock in the next 16 days are 5.0m 17s and forecast to arrive on Monday (Aug 10) 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 0.6m 4s period and expected on Sunday (Aug 16) at 9AM.

Wave TypeTime (ACST) & Date Wave Height & Period
Next good surf (1 star+)12PM (Sun 9th Aug)7.5ft (2.3m) 16s
Best Surf 9PM (Sun 9th Aug)15ft (4.5m) 19s
Most Powerful 9AM (Mon 10th Aug)16ft (5.0m) 17s

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


The Lowdown

Alright, my friends, let's talk about the surf ahead for Flatrock. The forecast is looking mighty interesting, with a big pulse of southwest groundswell on the way. There's some real promise, but also some serious conditions to navigate.

The opening act is a bit of a write-off. Sunday and Monday are looking sloppy with strong cross-shore winds and rising, unruly swell. It's going to be a turbulent mess out there. Then Tuesday the 12th brings a monster – a huge southwest swell. The energy readings are strong to very strong. This one is going to be way too big for most, and strictly for the experts. It's going to be a wild, intimidating ocean.

The real gem of this whole window looks to be Friday the 14th. The wind is forecast to drop right out, leaving it glassy. Swell will be a solid 12ft from the southwest, with a long 16-second period. This is the kind of heavy, powerful surf that Flatrock (Southern Coast) is known for. A serious, expert-only session with quality and power. The energy will still be strong, but the clean conditions will make it epic.

After that, the winds turn offshore from the east, cleaning up the leftovers. Saturday the 15th and Sunday the 16th are looking great for experienced surfers. We're talking clean waves in the 8ft to 10ft range. The wind will be off, the surf has plenty of drive, and while the period shortens a bit, the quality will be excellent. The water temp is pretty much normal for the season, so nothing out of the ordinary there.

Early the next week, it settles down to a friendly, clean 6ft of swell with a longer period again. It won't have the same punch as the earlier days but offers some fun, clean waves for those looking for a more mellow session. But hold on, the winds start to get messy again by the 19th, and by the 20th, it deteriorates back into lumpy, onshore slop. The final days of the forecast period look poor, so get your surfs in while the getting is good.

So, the big one to circle on the calendar is Friday the 14th. Big, clean, and glassy, that's the standout. For a more manageable but still solid session, the weekend of the 15th and 16th is the pick for the experienced crew. Get out there and enjoy it while it lasts.

Rusty.

Short Range Forecast

Heavy rain (total 24mm), heaviest during Sun afternoon. Very mild (max 15°C on Sun night, min 12°C on Sun night). Mainly near gales.

Days 4-6 Weather Summary

Some drizzle, heaviest during Wed morning. Very mild (max 15°C on Thu night, min 13°C on Wed night). Winds decreasing (strong winds from the WSW on Wed morning, calm by Fri morning).

Sunday
9
Monday
10
Tuesday
11
Wednesday
12
Thursday
13
Friday
14
Saturday
15
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
1
0
0
!
0
0
0
0
0
!
0
!
0
6
5
7
5
6
5
5
4
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
2.1
SW
16
3.5
SW
15
4
SW
19
5
SW
17
3.5
SW
16
2.5
SW
16
3
WSW
14
2.2
SW
18
4
SW
16
5
SW
17
4
SW
16
4.5
SW
16
3.5
SW
16
3.5
SW
16
3.5
SW
15
3.5
SW
16
3.5
SSW
17
3
SW
16
3
SW
16
2.5
SW
16
2.3
SW
14
Wave Graph
Metric surfscale
Energy kJ
2061
4829
11289
14444
6165
3288
3484
2960
7847
13267
7564
9648
6399
6363
5324
6112
6731
5140
4181
3326
2144
Wind (km/h)
30
NNW
20
SW
50
SSW
35
SW
25
W
30
NW
50
NNW
50
NW
40
SW
40
WSW
30
SW
25
WSW
20
WSW
20
W
10
WSW
5
W
10
SW
15
ESE
15
E
15
ESE
20
E
Wind State
cross
cross-on
cross-on
cross-on
on
cross-on
cross
cross-on
cross-on
on
cross-on
cross-on
cross-on
on
on
glassy
cross-on
cross-off
off
off
off
High Tide
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
1:44PM0.55m
1:37AM0.36m
1:57PM0.50m
2:01AM0.41m
Low Tide
8:33PM0.03m
8:25PM0.03m
4:35AM0.12m
8:22PM0.05m
5:35AM0.07m
8:19PM0.08m
6:18AM0.04m
8:14PM0.09m
6:55AM0.02m
8:11PM0.09m
7:28AM0.03m
8:12PM0.07m
thunderstorm
mod rain
thunderstorm
cloud
cloud
light rain
rain showers
thunderstorm
rain showers
rain showers
clear
clear
part cloud
cloud
cloud
cloud
cloud
cloud
light rain
part cloud
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:16
7:15
7:13
7:13
7:11
7:09
7:09
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:52
5:52
5:53
5:54
5:54
5:55
5:57
 mm
4
9
2
2
1
5
1
1
2
Temp °C
14
14
15
12
13
14
15
14
13
14
14
14
13
14
15
15
15
14
13
14
13
Feels °C
8
8
7
5
7
8
5
4
4
6
7
9
9
11
12
13
12
11
9
10
8
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
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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.

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