Flatrock Surf Break

Lat Long: 34.68° S 135.32° E

Flatrock Surf Forecast and Surf Report

Issued: 8 am 03 Aug 2026 (local time)

Forecast update in  hr  min

Today's Flatrock sea temperature is
15.3° 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 3 Aug 2026:

  • Best quality surf: Monday 10 Aug, 12AM (local time) - 21ft (6.5m), 16s period, SW swell with onshore winds.
  • Most powerful swell: Monday 10 Aug, 12AM (local time) - 21ft (6.5m), 16s period, SW swell with 22,969 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 6.5m 16s and forecast to arrive on Monday (Aug 10) at 12AM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.8m 4s period and expected on Saturday (Aug 08) at 3AM.

Wave TypeTime (ACST) & Date Wave Height & Period
Next good surf (1 star+) 3AM (Tue 4th Aug)7ft (2.1m) 12s
Best Surf12AM (Mon 10th Aug)21ft (6.5m) 16s
Most Powerful12AM (Mon 10th Aug)21ft (6.5m) 16s

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


The Lowdown

Hey folks, Rusty here. Let's talk about the 16-day outlook for Flatrock. This is a solid reef break that's pretty exposed to the SW, and it's a spot for the advanced crew, no doubt about it. Right now, we've got a real slow start, but hold on, because the second half of the week is where it's at.

The first couple of days are a write-off. Monday the 3rd is a mess with a strong, choppy cross-onshore wind and a 10-foot SW swell that's just not clean. The combined energy is cranking (3533), but it's all for nothing with that wind. Tuesday the 4th is where we see the first real window. Morning comes in with a glassy, 7-foot SW swell from a long 15-second period, giving it some real grunt (2092 energy). The wind is a light NNE, making it glassy, and it's clean. Afternoon follows with a 6-foot SW swell, also glassy. This is your best bet for the early part of the forecast. The water temp is about average for the season at 60°.

Wednesday the 5th is a step back with stronger cross/onshore winds and a dropping swell that's messy. Thursday the 6th is a better call, with a clean 6-foot SW swell in the morning (1500 energy) and a light, cross-offshore SE wind. It's smooth, but the swell is a bit smaller. Friday the 7th gets bigger again with an 8-foot SW swell, but the wind is a messy cross-shore from the north, so it's not as clean.

Now, the weekend. Saturday the 8th and Sunday the 9th? Abandon hope. We're talking about a near-gale from the north on Saturday (34 mph!) and a strong SW wind on Sunday with a 13-foot SW swell (5634 energy). This is a full-on, blown-out mess. The entire week of the 10th to the 14th is a parade of strong winds and massive, dangerous swell. The energy numbers are off the charts – we're talking 15,165 on the 12th with a 20-foot SW swell. That's not for paddling; that's for the big wave tow crew or the kite surfers, as it's just too big and dangerous for a standard paddle session.

The standout window, and I mean the true standout, is the final two days. Tuesday the 18th is the absolute pick of the 16 days. The morning is barely a whisper of wind, glassy conditions, with an 8-foot SW swell from a long 16-second period (3818 energy). It's going to be clean, powerful, and lined up. Afternoon is even better, with a 10-foot SW swell, 17-second period, and glassy conditions (4579 energy). This is the sort of session you remember. It's a bit of a long-range call, so it's a promising one, but check the charts closer to the time. Monday the 17th is also a decent option with an 12-foot SW swell and light winds, but it's a bit more onshore and not as clean as the 18th.

So, my advice: be patient. The first week is a write-off for the most part. Target Tuesday the 4th for a solid session, and then keep your eyes locked on Tuesday the 18th. That's the one.

Rusty, signing off.

Short Range Forecast

Mostly dry. Very mild (max 15°C on Wed afternoon, min 10°C on Tue night). Wind will be generally light.

Days 4-6 Weather Summary

Moderate rain (total 17mm), heaviest on Sat night. Very mild (max 19°C on Fri afternoon, min 11°C on Sat morning). Winds increasing (light winds from the SSE on Thu morning, near gales from the WSW by Sat night).

Monday
3
Tuesday
4
Wednesday
5
Thursday
6
Friday
7
Saturday
8
Sunday
9
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
1
3
4
4
3
2
1
2
4
3
5
3
2
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)
3
SW
14
2.5
SW
14
2.2
SW
13
2.1
SW
15
1.8
SW
15
0.9
SW
20
1.1
SW
19
1.6
SW
18
1.7
SW
16
1.7
SW
16
2.1
SW
16
3
SW
16
2.5
SW
16
2.4
SW
17
2.3
SW
16
2.2
SW
16
2.1
SW
15
3.5
SW
15
4
SW
14
4
SW
17
6.5
SW
16
Wave Graph
Metric surfscale
Energy kJ
3436
2462
1584
1885
1377
575
828
1628
1492
1456
2269
3745
3678
3364
2776
2344
1801
4786
5634
9123
22969
Wind (km/h)
20
SW
20
SW
10
S
5
NNE
5
WNW
20
NE
15
N
20
NW
10
SSW
10
SE
10
S
15
ENE
25
N
15
NW
35
NNW
55
N
45
NNW
60
WSW
40
SW
35
WSW
25
WNW
Wind State
cross-on
cross-on
cross
glassy
glassy
cross-off
cross
cross-on
cross-on
cross-off
cross
off
cross
cross-on
cross
cross
cross-on
cross-on
cross-on
on
on
High Tide
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
11:28AM0.50m
Low Tide
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
8:33PM0.03m
cloud
cloud
cloud
clear
clear
part cloud
cloud
part cloud
clear
clear
clear
clear
part cloud
cloud
light rain
light rain
light rain
rain showers
cloud
cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:20
7:20
7:18
7:18
7:18
7:16
7:16
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:47
5:49
5:50
5:50
5:51
5:52
5:52
 mm
4
2
2
9
Temp °C
13
13
13
12
12
11
14
15
15
14
14
13
16
19
17
13
14
13
13
13
14
Feels °C
9
8
9
10
10
6
9
10
12
12
11
10
11
15
14
3
9
2
4
5
8
  • Map Icons:
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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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