Flatrock Surf Break

Lat Long: 34.68° S 135.32° E

Flatrock Surf Forecast and Surf Report

Issued: 8 am 05 Aug 2026 (local time)

Forecast update in  hr  min

Today's Flatrock sea temperature is
15.2° C
0.1° 

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


Flatrock surf forecast from 5 Aug 2026:

  • Best quality surf: Sunday 9 Aug, 3PM (local time) - 13ft (4.0m), 21s period, SW swell with cross-onshore winds.
  • Most powerful swell: Monday 10 Aug, 3AM (local time) - 18ft (5.5m), 18s period, SW swell with 20,031 kJ wave energy.
  • Next surfable swell (1★+): Thursday 6 Aug, 9AM (local time) - 6ft (1.8m), 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 Thursday (Aug 06) at 9AM. The primary swell is predicted to be 1.8m and 16s period with a secondary swell of 0.6m and 5s. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Flatrock in the next 16 days are 5.5m 18s and forecast to arrive on Monday (Aug 10) at 3AM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.7m 6s period and expected on Saturday (Aug 08) at 12AM.

Wave TypeTime (ACST) & Date Wave Height & Period
Next good surf (1 star+) 9AM (Thu 6th Aug)6ft (1.8m) 16s
Best Surf 3PM (Sun 9th Aug)13ft (4.0m) 21s
Most Powerful 3AM (Mon 10th Aug)18ft (5.5m) 18s

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


The Lowdown

Alright folks, Rusty here, checking in on the local outlook for the next couple of weeks. Right now, it's a bit of a slow start, but there's some serious potential brewing later on if you're willing to wait for it.

For the first few days, we’re paying a price for that big swell. Wednesday the 5th is a write-off – messy cross-shore winds and a lumpy ocean with a combined energy of 1539, just not worth the paddle. Thursday the 6th is a different story though. A glassy morning with a 6ft SW swell and a 16-second period, the ocean is smooth as silk. The afternoon cleans up even more with a 7ft SW swell, and the energy jumps to 2502. Thursday is the stand-out of this first week. It’s a solid, clean wave, but that 7ft size and 16-second period means it’s got some punch; it’s one for the experienced surfers.

Then the wind turns ugly again. Friday the 7th through Tuesday the 12th is a no-go. We’re talking fresh onshore and cross-onshore winds, with swell heights pushing 13ft and even 16ft. The combined energy hits a massive 20784 on Wednesday the 12th. That’s not surfable, that’s a washing machine. The ocean is just too big and blown out for a paddle board.

Now, if you can hold out, we get a true reward. The focus shifts to Thursday the 13th. The morning is glassy again, with a 12ft SW groundswell pulsing at 16 seconds. The energy is still a hefty 6435, but with zero wind, the surface will be perfect. That’s the kind of day that’s worth calling in sick for, but it’s only for the experts.

The absolute best of the whole forecast, though, is Friday the 14th. The morning at Flatrock is clean with a light cross-off breeze and a 13ft swell from the SSW, with a long 18-second period. The combined energy hits 9101, and the conditions are described as exceptional. That’s a massive, powerful groundswell with clean conditions. Because it’s such a long period, it’ll be breaking a bit straight at the beach, so it’s going to be best for those who know the reef. It’s going to be a ripper, but it’s strictly for the experts. The crowds here are "sometimes," so expect a few other keen locals out there.

The weekend of the 16th and 17th settles down nicely. Sunday morning the 16th has a clean 6ft SW swell, 14 seconds, and an offshore breeze. It’s cleaner and more manageable for experienced surfers. Monday the 17th afternoon is glassy with a 5ft SW swell – a perfect, cruisy end to the run.

After that, the wind gets messy again around the 18th and 19th, with choppy conditions and onshore winds returning. The last few days of the outlook, the 20th, have some swell but the wind is cross-shore, making it choppy. The big moment is definitely that Friday the 14th.

Rusty, signing off.

Short Range Forecast

Moderate rain (total 12mm), heaviest on Fri afternoon. Very mild (max 16°C on Fri afternoon, min 12°C on Wed afternoon). Winds increasing (calm on Thu morning, strong winds from the NNW by Fri night).

Days 4-6 Weather Summary

Heavy rain (total 23mm), heaviest during Sat night. Very mild (max 16°C on Sat afternoon, min 11°C on Sun morning). Winds decreasing (near gales from the SW on Sun afternoon, moderate winds from the W by Mon morning).

Wednesday
5
Thursday
6
Friday
7
Saturday
8
Sunday
9
Monday
10
Tuesday
11
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
2
1
4
4
4
2
0
2
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)
1.1
SW
19
1.6
SW
18
1.7
SW
16
1.8
SW
16
2.2
SW
16
3
SW
16
2.5
SW
16
2.3
SW
17
2.5
SW
16
2.3
SW
16
2.3
SW
15
2
SW
14
2.5
SW
16
4
SW
21
4
SW
19
4
SW
17
3.5
SW
16
3
SW
15
3.5
SW
14
4
SW
16
5.5
SW
17
Wave Graph
Metric surfscale
Energy kJ
828
1536
1492
1707
2465
3905
3678
3222
3376
2620
2295
1602
3573
12745
10374
8469
6180
3729
4838
8370
18124
Wind (km/h)
20
N
25
NNW
20
SW
5
SSW
5
SW
15
NE
25
N
35
NNW
30
N
35
N
35
NNW
35
NW
50
W
55
SW
35
WSW
25
W
45
WNW
45
W
35
W
45
W
35
W
Wind State
cross
cross
cross-on
glassy
glassy
cross-off
cross
cross-on
cross
cross
cross-on
cross-on
on
cross-on
cross-on
on
cross-on
on
on
on
on
High Tide
3:05PM0.34m
4:40AM0.42m
2:26PM0.30m
5:50AM0.40m
10:26AM0.43m
11:28AM0.50m
12:06PM0.56m
1:39AM0.14m
12:38PM0.60m
1:07AM0.18m
Low Tide
9:50AM0.18m
9:31PM0.05m
10:37AM0.25m
9:30PM0.05m
9:16PM0.04m
8:51PM0.03m
8:33PM0.03m
8:25PM0.03m
4:35AM0.12m
8:22PM0.05m
cloud
cloud
part cloud
part cloud
clear
clear
cloud
mod rain
mod rain
rain showers
thunderstorm
rain showers
light rain
rain showers
rain showers
clear
rain showers
rain showers
part cloud
rain showers
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:18
7:18
7:18
7:16
7:16
7:15
7:13
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:50
5:50
5:51
5:52
5:52
5:52
5:53
 mm
6
6
1
2
6
3
3
1
3
4
1
Temp °C
13
13
14
13
13
12
15
16
14
15
16
15
11
12
14
14
14
14
14
13
14
Feels °C
9
9
11
12
12
9
8
8
8
8
10
10
0
-1
8
9
6
5
4
3
6
  • 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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