Flatrock Surf Break

Lat Long: 34.68° S 135.32° E

Flatrock Surf Forecast and Surf Report

Issued: 2 am 21 Jul 2026 (local time)

Forecast update in  hr  min

Today's Flatrock sea temperature is
15.6° 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 20 Jul 2026:

  • Best quality surf: Tuesday 28 Jul, 12AM (local time) - 15ft (4.5m), 15s period, SW swell with glassy winds.
  • Most powerful swell: Tuesday 28 Jul, 6AM (local time) - 16ft (5.0m), 17s period, SSW swell with 15,413 kJ wave energy.
  • Next surfable swell (1★+): Tuesday 28 Jul, 12AM (local time) - 15ft (4.5m), 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 Tuesday (Jul 28) at 12AM. The primary swell is predicted to be 4.5m and 15s period with a secondary swell of 3.5m 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 5.0m 17s and forecast to arrive on Tuesday (Jul 28) at 6AM. Winds are predicted to be offshore at the time the swell arrives.

Wave TypeTime (ACST) & Date Wave Height & Period
Next good surf (1 star+)12AM (Tue 28th Jul)15ft (4.5m) 15s
Best Surf12AM (Tue 28th Jul)15ft (4.5m) 15s
Most Powerful 6AM (Tue 28th Jul)16ft (5.0m) 17s

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


The Lowdown

Alright folks, Rusty here. Let’s get stuck into this one.

The big picture is that we’re in for a waiting game. The first few days are a write-off thanks to messy wind and lumpy conditions, but your patience is going to be rewarded. The real standout is sitting out there on the 28th of July – that’s the one to circle on the calendar.

We kick off on Tuesday the 21st of July. The swell is a solid 6ft from the SW, but with a moderate cross-shore breeze and a cross-chop, it’s not doing you any favours. The combined energy is moderate (1137), but the wind is just ruining any chance of a clean wave. This theme carries right through the week. Wednesday the 22nd sees a slightly bigger 6ft to 7ft, but the wind is onshore and lumpy – energy jumps up to 2190 on the morning, but it’s rough. Thursday the 23rd is a big one, with 13ft of SW groundswell, but it’s blown out and messy. That afternoon the wind turns cross-shore, and the energy is massive (10954), but the quality is still just marginal. Friday the 24th through Sunday the 26th stays in that same pattern: plenty of swell around 7ft to 10ft, but the wind is mostly cross-onshore and choppy. The water temperature is 60°, which is bang on average for this time of year, so nothing unusual there.

Now, Monday the 27th of July starts to look more interesting. The swell is 10ft to 12ft from the SW, and the wind backs off. It’s still only marginal, but you can feel the shift. The energy is strong (2784 to 7910), and the wind is light, but it’s still onshore in the afternoon – so not quite there yet.

Here’s your standout: Tuesday the 28th of July. This is the morning you want to be in the water at Flatrock. The forecast is for a 13ft SSW groundswell, with a very long period of 17 seconds. That’s proper groundswell. The wind turns light and cross-off – clean as a whistle. The combined energy is massive (7835), and the conditions are described as exceptional for expert surfers. This is a serious reef break, and with that size (over 8ft), it’s strictly for the experienced crew. The swell direction is SW, which matches the break’s optimum, so it’s going to line up perfectly. That afternoon, the wind goes glassy, and the swell drops to 12ft, still with a long period of 16 seconds – still a solid session if you’re on it.

Wednesday the 29th holds some swell at 10ft, with a clean cross-off wind in the morning, but the energy is lower (3365). It’s a decent follow-up day, but not the standout. Thursday the 30th and Friday the 31st of July keep the swell going, 7ft to 8ft, with clean conditions in the mornings, but the energy is fading. The 31st has a nice 7ft SSW swell with a 15-second period and a clean cross-off breeze – excellent for experienced surfers.

As we roll into August, the sizes drop off. Saturday the 1st of August has a 3ft SSW swell in the morning, clean, but the energy is weak (531). The afternoon sees a 2ft SW swell with a very long 19-second period and a clean offshore wind – that’s a weird combo, but it’ll be glassy. The 2nd of August is a wipeout with strong breeze. Monday the 3rd of August brings back a 6ft SW swell with a 17-second period, but the wind is cross-shore and lumpy. Tuesday the 4th of August has a 12ft SW swell, with a light onshore wind and strong energy (7047), but it’s marginal. The 5th of August is a washout with rain and fresh cross-shore winds.

So, to wrap it up: the first week is a bust. The surf starts to get good on the 27th, but the real magic is on the 28th of July. That’s the one. After that, it’s a slow decline into early August, with only small, clean windows for the confident crew.

Rusty out.

Short Range Forecast

Light rain (total 4mm), mostly falling on Tue night. Very mild (max 16°C on Tue afternoon, min 12°C on Wed night). Winds decreasing (fresh winds from the SSW on Wed night, light winds from the SW by Thu night).

Days 4-6 Weather Summary

Light rain (total 3mm), mostly falling on Fri night. Very mild (max 14°C on Fri night, min 12°C on Fri morning). Wind will be generally light.

Tuesday
21
Wednesday
22
Thursday
23
Friday
24
Saturday
25
Sunday
26
Monday
27
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
0
0
0
0
6
0
6
3
2
0
0
0
0
1
1
1
3
3
6
!
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.8
SW
13
1.8
SW
13
2
SW
12
1.9
SW
13
2.1
SW
12
4
SW
14
4
SW
14
4
SW
15
3
SSW
16
3
SSW
16
3
SSW
15
2.4
SSW
14
2.2
SSW
13
2.1
SSW
13
2
SSW
12
1.7
SW
12
1.4
SW
12
2
WSW
11
3
SW
13
3.5
SW
13
4.5
SW
15
Wave Graph
Metric surfscale
Energy kJ
1137
974
1092
1285
1193
5810
5602
6424
4605
4244
3431
2216
1648
1385
1117
768
480
920
2679
4767
8539
Wind (km/h)
20
N
20
NW
25
SW
30
SW
25
WSW
30
SSW
25
SSW
25
SSW
20
SSW
20
WSW
25
WSW
30
W
30
SW
25
SW
20
SSW
10
SW
15
SW
5
SW
10
WNW
10
W
5
SE
Wind State
cross
cross-on
cross-on
cross-on
cross-on
cross
cross-on
cross
cross
cross-on
on
on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
on
glassy
High Tide
3:03PM0.36m
4:59AM0.37m
2:50PM0.33m
6:14AM0.37m
1:25PM0.32m
9:36AM0.38m
11:03AM0.43m
11:41AM0.48m
00:33AM0.15m
12:12PM0.52m
00:30AM0.18m
Low Tide
9:39AM0.21m
9:51PM0.06m
10:18AM0.26m
10:08PM0.06m
11:31AM0.32m
10:24PM0.07m
10:29PM0.09m
9:39PM0.11m
8:23PM0.11m
3:47AM0.13m
8:04PM0.10m
cloud
cloud
rain showers
part cloud
rain showers
part cloud
light rain
cloud
part cloud
part cloud
cloud
rain showers
rain showers
clear
clear
clear
clear
clear
part cloud
part cloud
cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:30
7:30
7:28
7:28
7:28
7:26
7:26
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:38
5:39
5:39
5:40
5:42
5:42
5:43
 mm
2
1
1
2
1
Temp °C
15
16
16
13
13
13
12
12
12
12
13
14
14
14
14
14
14
14
14
14
13
Feels °C
11
12
12
7
7
5
6
6
6
7
8
9
9
9
10
12
11
11
12
12
11
  • 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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