Flatrock Surf Break

Lat Long: 34.68° S 135.32° E

Flatrock Surf Forecast and Surf Report

Issued: 8 pm 30 Jul 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 30 Jul 2026:

  • Best quality surf: Friday 31 Jul, 3AM (local time) - 5ft (1.6m), 13s period, SW swell with cross-offshore winds.
  • Most powerful swell: Sunday 2 Aug, 9PM (local time) - 11ft (3.5m), 16s period, SW swell with 6,075 kJ wave energy.
  • Next surfable swell (1★+): Friday 31 Jul, 3AM (local time) - 5ft (1.6m), 13s 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 Friday (Jul 31) at 3AM. The primary swell is predicted to be 1.6m and 13s period with a secondary swell of 0.6m and 9s. 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 3.5m 16s and forecast to arrive on Sunday (Aug 02) at 9PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.8m 4s period and expected on Wednesday (Aug 05) at 3AM.

Wave TypeTime (ACST) & Date Wave Height & Period
Next good surf (1 star+) 3AM (Fri 31st Jul)5ft (1.6m) 13s
Best Surf 3AM (Fri 31st Jul)5ft (1.6m) 13s
Most Powerful 9PM (Sun 2nd Aug)11ft (3.5m) 16s

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


The Lowdown

G’day, Rusty here, looking at what’s on offer at Flatrock. It’s a reef break that really only suits the advanced crew, handling a SW groundswell best.

The next week or so is a mixed bag. We’ve got a bit of a wait before anything truly turns on. Friday the 31st of July starts off with some knee-to-waist high SW swell, around 5 ft with a 13-second period, and the morning has a clean cross-off breeze. Problem is, it’s only scoring as marginal due to tide, and the combined energy is moderate at 941. The afternoon gets a bit more energy (1282) but the wind swings cross-on and messes it up a bit.

Saturday the 1st of August sees a bigger jump – a solid 7 ft SW groundswell with a very long 17-second period, but a fresh 30 km/h cross-shore wind kills it. That energy jumps to 2803, but it’s lumpy and not worth paddling out. That continues through Sunday and Monday – big swell (8 ft to 10 ft), strong winds, and rain. The combined energy hits 6415 on Sunday afternoon, but it’s a complete write-off. The swell is too big and wind too strong, especially for a reef setup – it’s more of a kite-surfing scene than a paddle one.

The best window in this first week is Tuesday the 4th of August morning. Glassy conditions, a light 6 ft SSW swell with a 12-second period, and the combined energy sits at 1221. It’s clean and the offshore wind means it’ll be peeling nicely. This is the standout for the near-term, but it’s not huge – just a good, clean session for the experienced. The afternoon gets a bit of cross-on wind, taking the edge off.

Later in the week, Thursday the 6th of August morning is another glassy moment – 8 ft SW swell, 16-second period, and clean. The combined energy is moderate at 2736, but it’s a bit of a bigger, more powerful wave. That’s a solid option for those who can handle it.

Now, looking further out, there’s a gap from the 9th through the 12th with nothing but poor conditions – big, windy, and blown out. Then, on Thursday the 13th of August, things get interesting. A massive 13 ft SW groundswell with a 19-second period rolls in, but the morning has a gentle cross-on wind, so it’s a bit choppy on the surface. The energy is very strong at 10320. Friday the 14th of August morning is the real long-range standout: an 12 ft SW swell, 18-second period, with a clean cross-shore breeze. The energy is still very strong at 8132. That’s a big, powerful groundswell that will handle the reef well, but it’s expert-only territory. The period is long, so expect long lulls between sets, making the paddle out easier, but the wave itself will be demanding. It’s promising, but with a 2-week lead time, treat it as a hopeful note in the diary.

The water temperature is about average for this time of year, nothing wild. Crowds at Flatrock can pop up sometimes, so expect company on the Tuesday and Thursday mornings if you’re keen.

Rusty.

Short Range Forecast

Light rain (total 2mm), mostly falling on Sun morning. Very mild (max 14°C on Sat afternoon, min 11°C on Fri morning). Winds increasing (calm on Fri afternoon, strong winds from the WSW by Sun morning).

Days 5-7 Weather Summary

Mostly dry. Very mild (max 14°C on Wed afternoon, min 10°C on Tue night). Winds decreasing (fresh winds from the WSW on Sun night, calm by Tue afternoon).

Friday
31
Saturday
1
Sunday
2
Monday
3
Tuesday
4
Wednesday
5
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
4
2
2
3
1
0
1
0
0
0
0
1
2
4
3
3
1
0
3
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.7
SSW
13
1.4
SW
13
1.4
SSW
14
1.8
SW
18
2.2
SW
17
2.5
SW
17
2.3
SW
16
2.2
SW
15
3
SW
15
3.5
SW
16
2.5
SW
14
2.5
SW
14
2.3
SW
13
1.7
SSW
12
1.7
SSW
15
1.1
SW
20
1.5
SW
19
2
SW
18
1.9
SW
16
Wave Graph
Metric surfscale
Energy kJ
1030
711
690
1974
2778
3442
2727
2293
3513
5922
2944
2344
1729
756
1332
927
1526
2366
1759
Wind (km/h)
10
ENE
15
NNE
15
NW
20
NE
30
N
30
NNW
35
N
40
NNW
40
W
30
SW
25
SW
20
SW
15
SSW
5
NNW
10
WNW
20
NE
25
N
25
NW
5
NW
Wind State
cross-off
cross-off
cross-on
cross-off
cross
cross-on
cross
cross
on
cross-on
cross-on
cross-on
cross-on
glassy
cross-on
cross-off
cross
cross-on
cross-on
High Tide
1:25AM0.28m
1:50PM0.58m
1:50AM0.32m
2:12PM0.56m
2:18AM0.36m
2:33PM0.52m
2:48AM0.39m
2:51PM0.47m
3:20AM0.41m
3:05PM0.41m
3:56AM0.42m
3:05PM0.34m
Low Tide
6:55AM0.02m
8:31PM0.07m
7:28AM0.02m
8:45PM0.06m
8:01AM0.04m
8:59PM0.05m
8:36AM0.07m
9:12PM0.05m
9:11AM0.11m
9:24PM0.05m
9:50AM0.18m
9:31PM0.05m
part cloud
clear
clear
clear
clear
clear
clear
light rain
rain showers
part cloud
part cloud
cloud
cloud
cloud
part cloud
part cloud
cloud
part cloud
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:24
7:22
7:22
7:20
7:20
7:18
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:45
5:46
5:46
5:47
5:49
5:50
 mm
1
1
Temp °C
13
13
13
12
13
14
14
13
13
13
12
12
12
12
12
11
13
14
14
Feels °C
9
8
9
8
6
7
8
4
4
5
5
7
7
10
9
7
7
9
13
  • 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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