Flatrock Surf Break

Lat Long: 34.68° S 135.32° E

Flatrock Surf Forecast and Surf Report

Issued: 8 am 01 Sep 2026 (local time)

Forecast update in  hr  min

Today's Flatrock sea temperature is
15.4°C
0.5° 

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


Flatrock surf forecast from 1 Sep 2026:

  • Best quality surf: Tuesday 8 Sep, 9AM (local time) - 15ft (4.5m), 17s period, SW swell with cross-shore winds.
  • Most powerful swell: Tuesday 8 Sep, 3PM (local time) - 15ft (4.5m), 17s period, SW swell with 11,694 kJ wave energy.
  • Next surfable swell (1★+): Thursday 3 Sep, 9PM (local time) - 11ft (3.5m), 15s 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 (Sep 03) at 9PM. The primary swell is predicted to be 3.5m and 15s period. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Flatrock in the next 16 days are 4.5m 17s and forecast to arrive on Tuesday (Sep 08) at 3PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 4s period and expected on Sunday (Sep 06) at 9AM.

Wave TypeTime (ACST) & Date Wave Height & Period
Next good surf (1 star+) 9PM (Thu 3rd Sep)11ft (3.5m) 15s
Best Surf 9AM (Tue 8th Sep)15ft (4.5m) 17s
Most Powerful 3PM (Tue 8th Sep)15ft (4.5m) 17s

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


The Lowdown

Alright folks, Rusty here. Let's get into it. We've got one break on the menu for the next 16 days, and it's a bit of a mixed bag, so let's walk through it.

The pattern shaping up is a bit of a slow burn, with a lot of noise to sift through. The surf is pretty much a no-go for the first few days, with onshore winds messing things up. But hold on, because we get a proper window of opportunity later on.

Tuesday the 1st and Wednesday the 2nd are write-offs. Tuesday morning has a solid 6 ft SW groundswell (1741 energy), but a fresh 30 km/h NNW cross-on wind has it lumpy and poor. Afternoon improves a bit with an onshore wind, but it's still not surfable. Wednesday morning bumps up to 8 ft SW, but it's still onshore and choppy. The afternoon gets even bigger to 10 ft, but the same story applies.

Thursday the 3rd is still a bit raw. Morning has 10 ft SW swell with a cross-on wind, making it choppy. The afternoon looks better though, with the swell pushing 12 ft SW and the wind swinging onshore but dropping to a light 10 km/h. It's marginal, but there's a glimmer.

Friday the 4th is where things start to get interesting. The morning is a real standout. The swell is a solid 12 ft SW, but the wind is a clean cross-offshore from the NNE at 25 km/h. The water temp is about 60°, which is pretty normal for this time of year. The combined energy is pumping at 5047, and it's described as clean. This is the best session on offer for the first week. The afternoon sees the wind swing back onshore, so get on it early.

Saturday the 5th is a massive day. We're talking 15 ft SW swell in the morning with a massive 13767 energy, but it's howling cross-on from the WSW at 25 km/h. That's a mess. The afternoon drops to 12 ft but a long 16-second period, and the wind eases to a gentle breeze, but it's still cross-on. It's a bit of a beast, and honestly, with that size and wind, this setup looks more interesting for kite surfing than paddle surfing.

Sunday the 6th is a redemption story. The morning has a clean cross-offshore wind from the NE at 20 km/h, with a 10 ft SW swell (3377 energy). It's clean. The afternoon is even better for the conditions: 7 ft SW swell with a cross-offshore SE breeze at 15 km/h. The report says "excellent surf conditions for experienced surfers." That's a good call.

Monday the 7th is a write-off again. Strong winds from the SE and S at 40 km/h make it messy and dangerous.

Tuesday the 8th is a case of too much of a good thing. The swell is a massive 15 ft with a 17-second period from the SW, and the energy is through the roof at 22588. The report says the wind and tide are favorable, but the swell is predicted to be too big for this break. This is strictly for experts only, and even then, it's a big call.

The second week sees the swell drop but still offers some windows. Wednesday the 9th has a 13 ft SSW groundswell, but it's cross-shore with a lumpy chop. Thursday the 10th has a 10 ft SW swell with a near-flat wind from the NNW at 5 km/h in the morning, making it glassy but with a slight cross-on ripple. It's clean but a bit weaker.

Friday the 11th and Saturday the 12th are smaller, with 8 ft and 7 ft swells, but the winds are light and manageable. Sunday the 13th has a clean morning with a 5 ft SSW swell and a cross-offshore wind, but it's a small one.

The last few days, Monday 14th to Tuesday 15th, are a total loss with strong onshore winds. Then, on Wednesday the 16th, we get a final little window. The morning has a clean 6 ft SW swell with a light offshore NE breeze at 10 km/h. It's described as "excellent surf conditions for experienced surfers." A nice way to end the run.

Best on offer: Friday the 4th morning for the big, clean 12 ft SW swell. Sunday the 6th afternoon for a more manageable, clean 7 ft SW swell. And Wednesday the 16th morning for a clean, smaller session.

Rusty.

Short Range Forecast

Mostly dry. Very mild (max 17°C on Tue morning, min 12°C on Tue night). Winds decreasing (fresh winds from the W on Wed night, light winds from the WNW by Thu afternoon).

Days 4-6 Weather Summary

Moderate rain (total 16mm), heaviest on Sun night. Warm (max 20°C on Sun afternoon, min 10°C on Sat night). Winds increasing (light winds from the WSW on Sat afternoon, strong winds from the SE by Sun night).

Tuesday
1
Wednesday
2
Thursday
3
Friday
4
Saturday
5
Sunday
6
Monday
7
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
2
2
0
0
2
3
6
5
0
0
0
5
6
4
4
1
1
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)
1.9
SW
15
1.6
SW
15
2.3
SW
16
2.5
SW
16
3
SW
14
4
SW
14
3
SW
14
3.5
SW
14
3.5
SW
15
3.5
SW
15
3
SW
15
3
SW
15
4.5
SW
14
3.5
SW
16
3.5
SW
15
3
SW
15
2.2
SW
14
1.4
SW
13
2.4
SW
14
2.5
SW
13
4
SW
18
Wave Graph
Metric surfscale
Energy kJ
1672
1034
2634
3326
3154
5754
4021
4823
5404
5047
4643
4223
8611
6520
5594
3377
1864
711
2258
2390
10476
Wind (km/h)
30
NNW
20
W
20
SW
20
W
30
W
35
W
20
SW
10
W
15
NE
25
NNE
35
NW
40
W
25
WSW
15
WSW
10
NNE
20
NE
15
SE
30
SE
40
SE
40
S
40
S
Wind State
cross-on
on
cross-on
on
on
on
cross-on
on
cross-off
cross-off
cross-on
on
cross-on
cross-on
cross-off
cross-off
cross-off
cross-off
cross-off
cross
cross
High Tide
2:10PM0.40m
2:46AM0.52m
2:12PM0.35m
3:15AM0.51m
1:57PM0.31m
3:47AM0.47m
1:07PM0.31m
4:29AM0.42m
11:20AM0.44m
11:40AM0.50m
1:53AM0.20m
Low Tide
8:11PM0.00m
8:59AM0.12m
8:18PM-0.00m
9:27AM0.19m
8:22PM-0.01m
9:50AM0.27m
8:21PM-0.01m
9:26AM0.36m
8:15PM-0.00m
8:01PM0.01m
7:45PM0.03m
cloud
clear
clear
cloud
cloud
part cloud
clear
clear
part cloud
part cloud
clear
part cloud
cloud
part cloud
clear
clear
light rain
heavy rain
light rain
light rain
rain showers
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:48
6:47
6:46
6:43
6:43
6:41
6:39
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:08
6:09
6:09
6:10
6:12
6:13
6:13
 mm
1
15
5
3
1
Temp °C
17
16
14
13
14
15
14
14
14
18
17
16
12
12
12
18
20
14
15
14
14
Feels °C
11
13
10
8
7
9
10
12
13
12
11
11
6
8
10
15
18
8
10
8
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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