Flatrock Surf Break

Lat Long: 34.68° S 135.32° E

Flatrock Surf Forecast and Surf Report

Issued: 2 am 12 Jul 2026 (local time)

Forecast update in  hr  min

Today's Flatrock sea temperature is
15.1° C
0.7° 

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


Flatrock surf forecast from 11 Jul 2026:

  • Best quality surf: Monday 13 Jul, 3AM (local time) - 18ft (5.5m), 16s period, SW swell with onshore winds.
  • Most powerful swell: Monday 13 Jul, 9PM (local time) - 18ft (5.5m), 17s period, SW swell with 16,197 kJ wave energy.
  • Next surfable swell (1★+): Monday 13 Jul, 3AM (local time) - 18ft (5.5m), 16s 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 Monday (Jul 13) at 3AM. The primary swell is predicted to be 5.5m and 16s period with a secondary swell of 4.0m and 16s. The wind is predicted to be onshore as the swell arrives.

The most powerful waves expected at Flatrock in the next 16 days are 5.5m 17s and forecast to arrive on Monday (Jul 13) at 9PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 3s period and expected on Saturday (Jul 18) at 3AM.

Wave TypeTime (ACST) & Date Wave Height & Period
Next good surf (1 star+) 3AM (Mon 13th Jul)18ft (5.5m) 16s
Best Surf 3AM (Mon 13th Jul)18ft (5.5m) 16s
Most Powerful 9PM (Mon 13th Jul)18ft (5.5m) 17s

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


Alright crew, Rusty here. We’ve got a heap of energy on the charts for Flatrock over the next 16 days, but the wind is going to be the main character in this story.

The main event is a big South-West groundswell hitting on July 13th. That Monday morning is the standout, with a solid 16ft swell from the SW, a very long period of 16 seconds, and wave energy off the charts at 22058. This is a serious, powerful ocean. The wind is onshore, but it’s considered a go. This is expert-only territory. The afternoon drops back to 13ft, still heavy with onshore wind.

Tuesday the 14th holds a 16ft swell in the morning, long period and very high energy at 18750. Still advanced. By afternoon it eases to 12ft, but gets choppier.

Now, Wednesday the 15th is your golden window. A morning cross-offshore breeze from the ENE at just 3 mph, and the swell drops to 8ft. Then the afternoon is glassy, with a 8ft SW swell at 15 seconds. Wave energy is 2328. This is clean, lined-up perfection for experienced surfers. This is the one to circle.

Thursday the 16th through Sunday the 19th has smaller, cleaner windows, but they’re marginal. You’ll see 7ft to 7ft surf with decent periods. The afternoons get a cross-onshore chop.

There’s a real flat patch from Saturday the 18th, with tiny 4ft to 6ft surf and strong, messy cross-shore winds. Not worth your time.

Then another pulse on Monday the 20th of July. Swell jumps to 12ft from the WSW with a 15 second period. Wave energy is 9695. The afternoon is cleaner with a gentle cross-onshore. A promising long-range call.

Tuesday the 21st of July looks good again: 7ft SW swell with a clean cross-offshore wind. Good conditions for experienced surfers.

The final week from the 22nd onward is a write-off. Strong winds, onshore flow, and rain. The 24th and 25th have big swell (10ft to 12ft) but with near gale-force winds. Completely blown out. The 27th ends with a near gale cross-shore.

The water temperature is 59°F, which is about normal for this time of year.

The bottom line: Your top picks are the glassy afternoon of Wednesday the 15th of July, and the cleaner session on Tuesday the 21st of July. The 13th and 14th are for the big dog experts only.

Rusty, signing out.

Short Range Forecast

Light rain (total 5mm), mostly falling on Mon night. Very mild (max 15°C on Sun morning, min 14°C on Sun morning). Winds decreasing (fresh winds from the WSW on Sun morning, light winds from the E by Tue night).

Days 4-6 Weather Summary

Mostly dry. Very mild (max 16°C on Thu afternoon, min 13°C on Wed morning). Wind will be generally light.

Sunday
12
Monday
13
Tuesday
14
Wednesday
15
Thursday
16
Friday
17
Saturday
18
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
0
!
0
!
!
3
4
4
4
4
3
3
4
3
2
2
0
1
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
3.5
SW
12
3.5
SW
13
4
SW
16
5
SW
16
4
SW
16
5.5
SW
17
5
SW
16
3.5
SW
16
3
SW
15
2.5
SW
14
2.4
SW
15
2.1
SW
14
2
SW
14
2.4
SW
17
2.4
SW
16
2.2
SW
16
1.9
SW
15
1.5
SW
14
1.2
SW
13
1.1
SW
13
0.8
SW
21
Wave Graph
Metric surfscale
Energy kJ
3278
3765
7353
12049
7954
15888
11624
5998
4141
2746
2328
1862
1604
3538
2881
2285
1526
849
503
386
548
Wind (km/h)
35
WSW
35
W
30
W
35
W
35
W
30
W
30
SW
20
SW
5
S
5
ENE
5
SW
15
NE
20
NNE
10
NNW
15
NE
20
NNE
15
NNW
20
NNE
30
N
25
NNW
35
N
Wind State
on
on
on
on
on
on
cross-on
cross-on
cross
cross-off
glassy
cross-off
cross-off
cross-on
cross-off
cross-off
cross-on
cross-off
cross
cross
cross
High Tide
11:46AM0.57m
1:08AM0.10m
12:29PM0.61m
00:54AM0.11m
1:07PM0.63m
00:57AM0.13m
1:39PM0.62m
1:10AM0.18m
2:06PM0.59m
1:34AM0.23m
2:27PM0.54m
2:06AM0.29m
2:42PM0.49m
2:43AM0.33m
Low Tide
8:44PM0.05m
9:00PM0.06m
4:44AM0.06m
9:13PM0.08m
5:40AM0.03m
9:17PM0.11m
6:27AM0.02m
9:15PM0.13m
7:10AM0.03m
9:13PM0.13m
7:49AM0.05m
9:14PM0.12m
cloud
cloud
part cloud
part cloud
part cloud
rain showers
rain showers
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
part cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:33
7:33
7:33
7:33
7:33
7:31
7:31
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:32
5:34
5:35
5:35
5:36
5:36
5:37
 mm
4
1
Temp °C
15
15
15
15
15
15
15
15
14
14
15
15
15
16
15
13
15
15
14
18
17
Feels °C
7
8
9
9
8
10
11
12
12
14
15
13
12
15
12
8
11
11
7
14
10
  • 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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