Flatrock Surf Break

Lat Long: 34.68° S 135.32° E

Flatrock Surf Forecast and Surf Report

Issued: 8 am 02 Aug 2026 (local time)

Forecast update in  hr  min

Today's Flatrock sea temperature is
15.1° C
0.3° 

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


Flatrock surf forecast from 2 Aug 2026:

  • Best quality surf: Sunday 9 Aug, 3PM (local time) - 20ft (6.0m), 16s period, WSW swell with onshore winds.
  • Most powerful swell: Sunday 9 Aug, 3PM (local time) - 20ft (6.0m), 16s period, WSW swell with 18,894 kJ wave energy.
  • Next surfable swell (1★+): Tuesday 4 Aug, 3AM (local time) - 7ft (2.1m), 12s 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 Tuesday (Aug 04) at 3AM. The primary swell is predicted to be 2.1m and 12s period with a secondary swell of 0.9m and 16s. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Flatrock in the next 16 days are 6.0m 16s and forecast to arrive on Sunday (Aug 09) at 3PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.0m 4s period and expected on Friday (Aug 07) at 6AM.

Wave TypeTime (ACST) & Date Wave Height & Period
Next good surf (1 star+) 3AM (Tue 4th Aug)7ft (2.1m) 12s
Best Surf 3PM (Sun 9th Aug)20ft (6.0m) 16s
Most Powerful 3PM (Sun 9th Aug)20ft (6.0m) 16s

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


The Lowdown

Alright, this is Rusty checkin' in with a look at what's ahead for Flatrock.

Right off the bat, I gotta be straight with you – the next week is a bit of a mixed bag, with some quality moments buried in there. We've got a solid south-west groundswell running, with some really long 15-second periods, meaning there's plenty of push and energy behind it. The combined energy readings are serious, hitting four and five-digit numbers, so there's no shortage of power.

Starting Sunday, August 2nd, it's a write-off. We're looking at 7ft to 8ft of SW swell, but a strong 22 mph onshore wind is just gonna trash it. The water's sitting at 59°, which is pretty average for the time of year, nothin' special. Monday the 3rd ain't much better – the swell is there, around 10ft, but that wind is still cross-onshore and the whole thing looks messy.

Now, here's where it gets good. Tuesday, August 4th, is your window. We've got a clean 7ft SW swell, but the real story is the wind. It's glassy. A 6 mph NNE breeze in the morning, then switching to a glassy WNW in the arvo. That's a major positive. The readings say "excellent surf conditions for experienced surfers," and I can see why. For the advanced crew, Tuesday morning is a standout.

Wednesday the 5th gets blown out again with a strong cross-shore, and then we see a new pulse of energy. Thursday the 6th looks cleaner with a cross-offshore breeze and 6ft of 16-second SW swell – a good, solid combo. Then Friday the 7th gets a bit wild. We've got a massive 10ft of SW swell with a 17-second period and the combined energy hits 4358. The wind is a strong but clean cross-offshore from the NNE. That's serious power, and for experts only. It's gonna be big and lined up.

We then hit a real sour patch. Saturday the 8th through the end of the following week is basically a write-off. The swell is still pumping, but we get hammered by strong onshore and cross-onshore winds, turning everything into a messy, dangerous brown-out. On Sunday the 9th, the 28 mph SW wind is pairin' with a 13ft swell, and the energy reading is 6926. That's not surf, that's a washing machine. The output even says it's predicted to be too big for the break, and by August 14th we're looking at gale-force winds. It'll be more of a kite-surfing setup than a paddle-surfing one.

After that long stretch of poor conditions, we finally get a reprieve. On Monday, August 17th, the wind drops to glassy again with a 6 mph ESE breeze. That 8ft SW swell on a 14-second period will have some nice shape. The reading is calling it "excellent surf conditions for experienced surfers." For the advanced surfer willing to wait it out, that Monday morning is the clear standout in the second week. The swell is a bit smaller than the monster stuff, but the clean conditions will make it a proper session.

So, to wrap it up: the best bets for a good paddle session are Tuesday the 4th for clean, manageable conditions, and Monday the 17th for clean but more powerful surf. The stuff in between is mostly for the hardcore chargers or the kite crew.

Rusty, signing off.

Short Range Forecast

Some drizzle, heaviest during Sun morning. Very mild (max 14°C on Sun afternoon, min 10°C on Tue night). Winds decreasing (fresh winds from the WSW on Sun afternoon, calm by Mon night).

Days 4-6 Weather Summary

Light rain (total 5mm), mostly falling on Fri night. Very mild (max 19°C on Fri afternoon, min 12°C on Wed morning). Winds increasing (calm on Thu afternoon, strong winds from the N by Fri night).

Sunday
2
Monday
3
Tuesday
4
Wednesday
5
Thursday
6
Friday
7
Saturday
8
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
0
2
1
3
4
4
3
2
2
2
4
3
4
3
3
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)
2.2
SW
15
2.5
SW
15
3.5
SW
16
3
SW
14
2.5
SW
14
2.2
SW
13
2.1
SW
15
1.9
SSW
15
1.5
SSW
15
1.4
SW
15
1.8
SW
18
1.7
SW
16
1.7
SW
16
2.1
SW
17
3
SW
16
3
SW
17
2.5
SW
17
2.3
SW
16
2.5
SW
16
2.5
SW
15
4
WSW
15
Wave Graph
Metric surfscale
Energy kJ
2263
2597
5273
3436
2462
1584
1860
1508
911
856
1947
1511
1438
2622
4261
4335
3770
2676
3373
2821
6207
Wind (km/h)
35
WNW
35
WSW
30
WSW
20
SW
20
SW
10
S
5
NNE
5
WNW
20
NE
25
N
20
NNW
10
NW
15
NNE
10
NW
20
NE
30
NNE
20
N
45
N
40
NW
40
NW
55
WSW
Wind State
on
on
cross-on
cross-on
cross-on
cross
glassy
glassy
cross-off
cross
cross
cross-on
cross-off
cross-on
cross-off
cross-off
cross
cross
cross-on
cross-on
on
High Tide
2:33PM0.52m
2:48AM0.39m
2:51PM0.47m
3:20AM0.41m
3:05PM0.41m
3:56AM0.42m
3:05PM0.34m
4:40AM0.42m
2:26PM0.30m
5:50AM0.40m
10:26AM0.43m
Low Tide
8:59PM0.05m
8:36AM0.07m
9:12PM0.05m
9:11AM0.11m
9:24PM0.05m
9:50AM0.18m
9:31PM0.05m
10:37AM0.25m
9:30PM0.05m
9:16PM0.04m
8:51PM0.03m
light rain
clear
part cloud
cloud
cloud
part cloud
clear
clear
part cloud
cloud
light rain
part cloud
cloud
part cloud
clear
part cloud
cloud
light rain
thunderstorm
light rain
rain showers
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:22
7:20
7:20
7:18
7:18
7:18
7:16
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:46
5:47
5:49
5:50
5:50
5:51
5:52
 mm
1
1
4
3
2
7
Temp °C
13
14
14
13
13
13
11
11
11
13
12
13
14
15
15
16
19
15
16
15
12
Feels °C
6
6
7
9
8
9
9
9
6
8
7
11
11
13
11
9
14
8
11
8
-1
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  • 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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