Flatrock Surf Break

Lat Long: 34.68° S 135.32° E

Flatrock Surf Forecast and Surf Report

Issued: 8 am 17 Jul 2026 (local time)

Forecast update in  hr  min

Today's Flatrock sea temperature is
15.4° C
0.3° 

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


Flatrock surf forecast from 17 Jul 2026:

  • Best quality surf: Friday 17 Jul, 9PM (local time) - 5ft (1.6m), 15s period, SW swell with cross-offshore winds.
  • Most powerful swell: Thursday 23 Jul, 6AM (local time) - 11ft (3.5m), 14s period, SW swell with 4,697 kJ wave energy.
  • Next surfable swell (1★+): Friday 17 Jul, 9PM (local time) - 5ft (1.6m), 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 Friday (Jul 17) at 9PM. The primary swell is predicted to be 1.6m and 15s period with a secondary swell of 0.5m and 5s. 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 14s and forecast to arrive on Thursday (Jul 23) at 6AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 3s period and expected on Saturday (Jul 18) at 9AM.

Wave TypeTime (ACST) & Date Wave Height & Period
Next good surf (1 star+) 9PM (Fri 17th Jul)5ft (1.6m) 15s
Best Surf 9PM (Fri 17th Jul)5ft (1.6m) 15s
Most Powerful 6AM (Thu 23rd Jul)11ft (3.5m) 14s

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


The Lowdown

Alright, let’s break down Flatrock. The first week is a bit of a dud, honestly. We’ve got a long period SW groundswell starting Friday the 17th, but the wind is all over the place. Friday morning the 17th has a 7ft SW swell with a 16-second period, so there’s serious energy out there, but that north wind is blowing at 12 mph, making it a cross-chop. It’s messy. Water temp is around 60°F, which is average for the season.

From Friday the 17th all the way through Wednesday the 23rd, it’s mostly onshore or cross-shore winds, choppy conditions, and nothing is clean. Sunday morning the 19th has a tiny 2ft swell – forget it.

Now, Thursday the 23rd morning is the first real sign of life. A solid 10ft SW swell with a 14-second period, and finally a clean SSE cross-off wind at 9 mph. The energy is strong at 3463. This is for experienced surfers only – 10ft is big, and the reef will be working. The afternoon stays clean but the wind picks up a little.

The standout session, the one you wake up early for, is Friday the 24th. Morning shows an 8ft SSW swell, 15-second period, with a light 6 mph offshore breeze from the east. That’s perfect. The energy is massive at 4338, but the waves will be clean and lined up. Get in the water early. Afternoon goes cross-shore, so don’t sleep in.

After that, the 25th and 26th see the wind turning onshore again, but the swell hangs around. It’s a shame.

Then, Monday the 27th morning is a big one. A 12ft SSW swell, 17-second period, and the energy is 7229 – that’s serious ocean power. The wind is cross-shore at 19 mph, so it’s lumpy, but for the big-wave crew, that’s the call. The afternoon is a 13ft wave with fresh onshore wind – more of a kite day.

The 28th and 29th drop back to 8ft and 6ft with clean cross-off winds, so there’s fun to be had. Crowds can be an issue sometimes, so keep your head on a swivel.

The real finale is the 31st of July and the 1st of August. The 31st afternoon has a 13ft SSW swell with a 19-second period, energy over 10,000, and light cross-shore wind. That’s expert territory. Then August 1st morning is a 13ft SW swell, and by the afternoon it’s a 15ft SSW with a 16-second period and an energy reading of 17138. That’s absolutely massive. The wind is light, but the swell is so big the forecast says it might be too big for the break itself. That’s a day to watch from the cliffs.

For the regular surfer, go for Friday the 24th morning. For the big-wave guys, you’ve got a window from the 27th through the 1st of August. Respect the ocean.

Rusty.

Short Range Forecast

Mostly dry. Very mild (max 16°C on Sat afternoon, min 12°C on Fri morning). Wind will be generally light.

Days 4-6 Weather Summary

Light rain (total 4mm), mostly falling on Tue night. Very mild (max 16°C on Mon night, min 13°C on Wed night). Wind will be generally light.

Friday
17
Saturday
18
Sunday
19
Monday
20
Tuesday
21
Wednesday
22
Thursday
23
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
1
3
1
2
1
0
0
3
2
0
3
2
2
2
3
2
3
4
2
3
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
2.1
SW
16
1.9
SW
16
1.5
SW
14
1.3
SW
13
1.2
SW
13
1.1
SW
13
0.6
SW
19
1.7
WSW
18
1.7
SW
16
1.7
SW
15
1.7
SW
14
2.1
SW
14
1.9
SW
13
1.8
SW
13
1.3
SW
12
1.9
SW
14
2.4
SW
12
2.5
SSW
14
2.5
SW
14
2.5
SW
14
2.5
SW
14
Wave Graph
Metric surfscale
Energy kJ
2270
1719
899
570
495
369
303
1859
1456
1271
1220
1712
1247
1006
503
1358
1632
3108
2885
2528
2506
Wind (km/h)
20
N
15
NW
15
NE
20
N
15
NNW
20
NNE
25
N
25
NNW
20
NNE
25
N
20
NNW
15
N
15
NNW
15
WNW
5
WNW
5
WSW
20
SSW
15
S
10
S
10
SSW
10
SW
Wind State
cross
cross-on
cross-off
cross
cross
cross-off
cross
cross-on
cross-off
cross
cross-on
cross
cross
cross-on
on
on
cross
cross
cross-off
cross-on
cross-on
High Tide
2:27PM0.54m
2:06AM0.29m
2:42PM0.49m
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
Low Tide
9:13PM0.13m
7:49AM0.05m
9:14PM0.12m
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
clear
clear
clear
clear
clear
part cloud
part cloud
part cloud
part cloud
cloud
cloud
cloud
cloud
cloud
light rain
rain showers
rain showers
part cloud
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:31
7:31
7:31
7:31
7:30
7:30
7:28
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:36
5:37
5:37
5:37
5:38
5:39
5:39
 mm
2
1
1
Temp °C
12
14
15
13
16
16
13
16
16
14
15
16
15
15
15
14
14
14
13
13
13
Feels °C
7
10
10
7
13
12
7
12
12
9
11
13
11
13
15
13
10
10
10
10
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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