Flatrock Surf Break

Lat Long: 34.68° S 135.32° E

Flatrock Surf Forecast and Surf Report

Issued: 2 am 26 Jul 2026 (local time)

Forecast update in  hr  min

Today's Flatrock sea temperature is
15.5° C
0.1° 

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


Flatrock surf forecast from 25 Jul 2026:

  • Best quality surf: Tuesday 28 Jul, 9PM (local time) - 18ft (5.5m), 15s period, SW swell with cross-onshore winds.
  • Most powerful swell: Wednesday 29 Jul, 12AM (local time) - 20ft (6.0m), 16s period, SW swell with 16,936 kJ wave energy.
  • Next surfable swell (1★+): Tuesday 28 Jul, 9PM (local time) - 18ft (5.5m), 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 9PM. The primary swell is predicted to be 5.5m and 15s period with a secondary swell of 4.0m and 15s. The wind is predicted to be cross-onshore as the swell arrives.

The most powerful waves expected at Flatrock in the next 16 days are 6.0m 16s and forecast to arrive on Wednesday (Jul 29) at 12AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 8s period and expected on Saturday (Aug 01) at 12AM.

Wave TypeTime (ACST) & Date Wave Height & Period
Next good surf (1 star+) 9PM (Tue 28th Jul)18ft (5.5m) 15s
Best Surf 9PM (Tue 28th Jul)18ft (5.5m) 15s
Most Powerful12AM (Wed 29th Jul)20ft (6.0m) 16s

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


The Lowdown

Right, let’s have a look at the next couple of weeks here. The only spot in the mix is Flatrock, a reef break that’s advanced only. It’s a fairly consistent spot, exposed to the swell, and it likes it from the southwest. The water temp is about average for the time of year, nothing weird to report there.

We’re starting off on Sunday the 26th of July with a bit of a mixed bag. The morning has some solid 5.6ft swell from the southwest, with a period of 11 seconds, but the wind is a light cross from the NNW. It’s not clean, and the combined energy is moderate (800). It’s only marginal. The afternoon gets worse with a stronger cross-onshore wind, so that’s a write-off.

Monday the 27th is a total no-go. A strong breeze and then near gale-force winds, messy and blown out. The swell jumps up to 7.5ft on Monday afternoon, but it’s a short period windswell of 8 seconds and the wind is onshore. Not for surfing.

Tuesday the 28th brings some serious size – 9.8ft to 11.5ft from the southwest, with a long period of 15 seconds. The energy is massive (up to 6114), but the wind is howling. Onshore in the morning, cross-onshore in the afternoon. This is only for experts, and even then, the conditions are poor. The wind is just too strong.

Wednesday the 29th still has a big swell running, 11.5ft from the south-southwest with a very long period of 16 seconds. The morning has a moderate cross-shore wind, and the score is a 5, but it’s still marginal. The energy is huge (6494). It’s a stand-out for size, but it’s a lumpy, big day. Then the afternoon also goes cross-onshore, so you’d have to be on it early and be a very good surfer to handle the power.

Thursday the 30th is a step down in size, but it’s still a decent 7.2ft from the south-southwest, period 13 seconds. The wind is light in the morning, but it’s cross-shore, so it’s a bit messy. The energy is still strong (1826). It’s a marginal day, but the cleanest we’ve seen for a few days.

Friday the 31st of July is where things get interesting. The morning has a clean, cross-offshore wind from the NNE and 4.6ft of swell from the south-southwest. The period is 13 seconds, so there’s some shape. It’s the cleanest window we’ve had all week, even if the energy is moderate (952). It’s still a bit marginal, but it’s the best on offer right now.

Saturday the 1st of August has a bigger, 6.6ft swell from the south-southwest with a very long period of 17 seconds, but a fresh cross-shore wind makes it lumpy. Not great.

The beginning of the next week is a write-off. Sunday the 2nd and Monday the 3rd are blown out by near gale and fresh onshore winds. It’s pure survival stuff.

Tuesday the 4th of August is a monster day. 16.4ft of swell from the southwest, but the wind is onshore. That’s just a dangerous, horrible mess. The energy is over 12,900 – that’s a really strong, powerful ocean. Only for the crazies.

Now, here’s the real standout. Wednesday the 5th of August. The morning has a clean, cross-offshore wind from the north, with 7.9ft of swell from the south-southwest, period 14 seconds. The energy is strong (2313), and the report says “excellent surf conditions for experienced surfers”. This is the best window. The swell is a bit big for beginners, but for any advanced surfer, this is the one to circle. Clean conditions and good power.

Thursday the 6th of August morning is also clean, with a cross-offshore wind and 6.2ft swell from the southwest. It’s a solid follow-up day.

Friday the 7th of August is another interesting one. The morning is clean and cross-offshore with 5.2ft swell, but the period hits 20 seconds. That’s a very long period groundswell. The afternoon is even better: 7.9ft from the west-southwest, period 18 seconds, with a gentle cross-shore wind. The energy is massive (7302). It’s a marginal rating, but this is a big, clean, powerful swell. The long period will make the waves more organized at this reef, so it could be a fantastic session for the experienced crew.

Saturday the 8th and Sunday the 9th see a lot of wind come back in, with a fresh breeze and lumpy conditions, so that quality drops off.

Monday the 10th of August is a no-go, with near gale cross-onshore winds and a massive 13.1ft swell. That’s a kite day, not a paddle day.

So, to sum it up: the standout is Wednesday the 5th of August with clean conditions and a solid 7.9ft southwest

Short Range Forecast

Light rain (total 2mm), mostly falling on Mon afternoon. Very mild (max 15°C on Mon afternoon, min 11°C on Tue afternoon). Winds increasing (light winds from the NNW on Sun morning, near gales from the NW by Mon morning).

Days 4-6 Weather Summary

Mostly dry. Very mild (max 12°C on Wed afternoon, min 10°C on Thu night). Wind will be generally light.

Sunday
26
Monday
27
Tuesday
28
Wednesday
29
Thursday
30
Friday
31
Saturday
1
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
1
0
0
0
0
0
!
5
3
3
4
3
4
2
3
3
1
2
2
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
SW
11
1.7
SW
12
1.5
SW
12
1.3
SW
14
3
W
9
2.5
SW
13
3
SW
15
3.5
SW
15
6
SW
16
3.5
SSW
16
3.5
SSW
14
2.5
SSW
13
2.2
SSW
13
2
SSW
13
1.7
SSW
13
1.4
SW
13
1.4
SW
13
1.7
SW
18
1.7
SSW
16
1.9
SW
16
2
SW
16
Wave Graph
Metric surfscale
Energy kJ
754
794
583
595
1331
2278
3822
4823
16936
6494
4568
2394
1699
1380
1030
700
623
1798
1461
1988
2058
Wind (km/h)
10
NNW
15
WNW
20
NNW
45
NNW
45
NW
30
WNW
35
WSW
45
SW
30
SSW
20
SSW
20
S
15
S
10
SSE
10
S
15
ENE
15
NNE
10
NW
20
NE
30
N
20
NNW
30
NNE
Wind State
cross-on
cross-on
cross
cross
cross-on
on
cross-on
cross-on
cross-on
cross
cross
cross
cross-off
cross
off
cross-off
cross-on
cross-off
cross
cross
cross-off
High Tide
11:41AM0.48m
00:33AM0.15m
12:12PM0.52m
00:30AM0.18m
12:39PM0.56m
00:43AM0.21m
1:04PM0.58m
1:02AM0.25m
1:28PM0.59m
1:25AM0.28m
1:50PM0.58m
1:50AM0.32m
2:12PM0.56m
2:18AM0.36m
Low Tide
8:23PM0.11m
3:47AM0.13m
8:04PM0.10m
4:59AM0.10m
8:03PM0.09m
5:44AM0.06m
8:10PM0.09m
6:21AM0.04m
8:19PM0.08m
6:55AM0.02m
8:31PM0.07m
7:28AM0.02m
8:45PM0.06m
part cloud
part cloud
part cloud
clear
rain showers
rain showers
cloud
cloud
part cloud
part cloud
cloud
cloud
cloud
cloud
part cloud
clear
clear
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:26
7:26
7:26
7:24
7:24
7:24
7:22
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:42
5:43
5:44
5:45
5:45
5:45
5:46
 mm
1
1
Temp °C
14
14
14
14
15
15
13
12
12
11
12
12
12
12
12
11
12
12
12
14
13
Feels °C
13
11
10
5
9
9
5
2
6
5
7
8
9
9
8
7
9
7
6
9
8
  • 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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