Flatrock Surf Break

Lat Long: 34.68° S 135.32° E

Flatrock Surf Forecast and Surf Report

Issued: 8 pm 18 Jul 2026 (local time)

Forecast update in  hr  min

Today's Flatrock sea temperature is
15.7° 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 18 Jul 2026:

  • Best quality surf: Friday 24 Jul, 9PM (local time) - 8ft (2.5m), 14s period, SSW swell with glassy winds.
  • Most powerful swell: Thursday 23 Jul, 12PM (local time) - 10ft (3.0m), 16s period, SW swell with 5,154 kJ wave energy.
  • Next surfable swell (1★+): Friday 24 Jul, 9PM (local time) - 8ft (2.5m), 14s period with SSW 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 24) at 9PM. The primary swell is predicted to be 2.5m and 14s period. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Flatrock in the next 16 days are 3.0m 16s and forecast to arrive on Thursday (Jul 23) at 12PM. Winds are predicted to be cross-shore at the time the swell arrives.

Wave TypeTime (ACST) & Date Wave Height & Period
Next good surf (1 star+) 9PM (Fri 24th Jul)8ft (2.5m) 14s
Best Surf 9PM (Fri 24th Jul)8ft (2.5m) 14s
Most Powerful12PM (Thu 23rd Jul)10ft (3.0m) 16s

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


The Lowdown

Alright folks, Rusty here. Let’s have a look at what’s cooking at Flatrock over the next couple of weeks.

Right off the bat, we’re in a bit of a holding pattern. The first few days are a write-off with messy, choppy conditions and onshore winds. The waiting game starts now. From Sunday the 19th through to Wednesday the 23rd, it’s a real battle – the wind is all over the place and the waves are chopped up, offering nothing worth your time. The waiting game starts now.

The first real flicker of hope shows up on Thursday, 30 July. The morning has a clean 6 ft SSW swell with a light cross-offshore breeze. The energy is moderate (2229), and the conditions are described as clean. This is for experienced surfers, but it’s the first sign of quality. The swell period is a solid 14 seconds, so there’s some proper groundswell running, but at a reef break like Flatrock, that long period should wrap in nicely. Be ready for a dawn patrol session.

The real standout, though, is the Friday, 31 July. The afternoon session is the pick of the entire forecast. The wind drops to dead calm – glassy conditions – with a 5 ft SSW swell. The energy is moderate (850), but the complete lack of wind makes up for it. The word is “glassy,” and that’s the kind of magic that Flatrock can deliver. The swell direction is a solid match for the optimum, and the consistency is fairly consistent. This is the one to circle on the calendar. You’ll want to be in the water.

Then, into the first week of August, the swell holds. Saturday, 1 August, has a glassy 3 ft SW swell in the afternoon. It’s small but clean. Then Sunday, 2 August, the morning pulls in a 4 ft SSW swell with a very long 20-second period. That’s proper groundswell, and the energy is picking up (1657). A clean cross-off breeze makes it stand out. And Monday, 3 August, the morning session has a 5 ft SW swell with a 16-second period, clean conditions, and moderate energy (1539). The second week is looking a lot more promising, but it’s still a little way out, so keep an eye on the forecasts.

The water temperature is about average for the time of year.

So, to sum it up: the first week is a write-off for paddling, but if you’re a kite surfer, some of those windy, lumpy days in the middle of the week might get you going. For the rest of us, the real window opens on the 30th, with the 31st being the absolute best day for a glassy, clean session at Flatrock. The second week has some solid potential, too.

Rusty signing off.

Short Range Forecast

Mostly dry. Very mild (max 16°C on Sat night, min 13°C on Sat night). Mainly fresh winds.

Days 5-7 Weather Summary

Some drizzle, heaviest during Tue night. Very mild (max 15°C on Tue night, min 11°C on Thu night). Winds decreasing (fresh winds from the SW on Tue night, light winds from the SSW by Thu night).

Sunday
19
Monday
20
Tuesday
21
Wednesday
22
Thursday
23
Friday
24
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
1
0
1
2
2
0
3
3
0
0
0
0
0
3
4
4
3
2
4
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
13
0.6
SW
19
1.4
SW
18
1.8
SW
16
1.8
SW
15
2.1
SW
15
2.1
SW
14
1.8
SW
13
1.6
SW
13
1.6
SW
12
2.1
SW
13
2.2
SW
12
3.5
SW
14
3
SW
14
3
SW
16
3
SW
15
2.3
SW
14
2.3
SSW
14
2.5
SSW
14
Wave Graph
Metric surfscale
Energy kJ
363
303
1227
1591
1377
1776
1608
1137
825
734
1568
1347
4762
3060
5154
3720
2125
2121
2378
Wind (km/h)
20
NNE
25
N
25
NNW
25
N
25
N
20
NNW
15
N
15
NNW
15
NW
25
W
30
SW
30
SW
30
SSW
25
S
20
S
10
SSW
10
WSW
15
WSW
5
W
Wind State
cross-off
cross
cross
cross
cross
cross-on
cross
cross
cross-on
on
cross-on
cross-on
cross-on
cross
cross
cross-on
cross-on
on
glassy
High Tide
2:43AM0.33m
2:54PM0.44m
3:23AM0.36m
3:02PM0.40m
4:08AM0.37m
3:03PM0.36m
4:59AM0.37m
2:50PM0.33m
6:14AM0.37m
1:25PM0.32m
9:36AM0.38m
Low Tide
8:26AM0.09m
9:21PM0.09m
9:02AM0.15m
9:34PM0.07m
9:39AM0.21m
9:51PM0.06m
10:18AM0.26m
10:08PM0.06m
11:31AM0.32m
10:24PM0.07m
10:29PM0.09m
part cloud
part cloud
clear
cloud
cloud
cloud
cloud
cloud
cloud
rain showers
clear
clear
cloud
part cloud
cloud
part cloud
part cloud
cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:31
7:31
7:30
7:30
7:28
7:28
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:37
5:37
5:38
5:39
5:39
5:40
 mm
1
Temp °C
16
13
16
16
14
15
15
15
15
15
13
13
12
12
12
12
11
11
11
Feels °C
12
7
12
12
9
11
12
12
12
11
6
6
5
6
7
8
8
7
9
  • 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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