Flatrock Surf Break

Lat Long: 34.68° S 135.32° E

Flatrock Surf Forecast and Surf Report

Issued: 2 pm 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 21 Jul 2026:

  • Best quality surf: Monday 27 Jul, 6PM (local time) - 10ft (3.0m), 12s period, SW swell with glassy winds.
  • Most powerful swell: Thursday 23 Jul, 6PM (local time) - 13ft (4.0m), 15s period, SW swell with 6,872 kJ wave energy.
  • Next surfable swell (1★+): Sunday 26 Jul, 6AM (local time) - 6ft (1.8m), 11s 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 Sunday (Jul 26) at 6AM. The primary swell is predicted to be 1.8m and 11s period with a secondary swell of 0.4m and 16s. Another secondary swell of 0.4m and 3s is also forecast. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Flatrock in the next 16 days are 4.0m 15s and forecast to arrive on Thursday (Jul 23) at 6PM. 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+) 6AM (Sun 26th Jul)6ft (1.8m) 11s
Best Surf 6PM (Mon 27th Jul)10ft (3.0m) 12s
Most Powerful 6PM (Thu 23rd Jul)13ft (4.0m) 15s

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


The Lowdown

Alright, mate. Rusty here, with a look at what's coming down the line for Flatrock.

First off, the water temp is sitting at 60°, which is right on the money for this time of year. Nothing weird there.

The next week and a half is a bit of a mixed bag, to be honest. We've got some serious size coming, but the wind is going to be a real pain in the arse for most of it. The best window I can see, and it's not a perfect one, is shaping up around Thursday the 23rd of July. We've got a solid 13ft SW groundswell (14-15 second period) pumping in, with a combined energy of (10869). That's a lot of power. But the wind is a cross-shore fresh breeze, making it lumpy. It's a marginal call, but for the advanced crew, that's where the size is. The period is long, so a reef break like Flatrock will handle it better than a beach break would.

The following days, Friday the 24th, also have a 10ft SW swell, with the wind actually going offshore (WSW) in the afternoon. That's a rare treat. The energy is still strong (3431). The morning is a bit messy with a cross-onshore, but that afternoon window could be a standout for a few hours if you're quick. The water will be clean.

Then it gets messy again until Sunday the 26th of July. That morning, the wind swings to a light NNE cross-offshore breeze, with a 6ft SW groundswell (11 seconds). The energy is moderate (786). The wave comment says "expect very good surf conditions" and it's described as clean. That's a small window, but it's the cleanest surf on offer in the first week. For a reef break, clean conditions are golden.

After that, there's a block of marginal surf with cross-shore winds and some serious size (10ft+) but never clean right through to the end of the month. The first of August shows a bit of promise on Saturday morning: a 5ft SW groundswell with a very long 16-second period and a clean cross-offshore breeze from the NNE. That's a nice, clean groundswell that will wrap in well. The energy is moderate (1543). It's a good option for a Saturday, but it's a long way out so keep an eye on it.

The last call I see is on Monday the 3rd of August. That afternoon, the wind goes cross-offshore and the swell is a tiny 3ft, but the period is a massive 19 seconds. That's a very long period groundswell. The energy is moderate (1162). It'll be clean, but it's a small one. For a reef, a long period on a small swell can still produce some nice lines.

So, if I'm picking the best of what's on offer, I'm looking at the afternoon of Friday the 24th of July for that 10ft offshore window. It's the best combo of size and clean conditions. The second best is the Sunday morning the 26th for the cleanest, most user-friendly conditions, even if it's a bit smaller. Everything else is either too windy, too lumpy, or just a waiting game.

Rusty out.

Short Range Forecast

Light rain (total 3mm), mostly falling on Tue night. Very mild (max 16°C on Tue afternoon, min 12°C on Wed morning). Winds decreasing (fresh winds from the SW on Wed morning, light winds from the SW by Thu night).

Days 5-7 Weather Summary

Light rain (total 4mm), mostly falling on Sat morning. Very mild (max 15°C on Sun afternoon, min 12°C on Fri afternoon). Wind will be generally light.

Tue
21
Wednesday
22
Thursday
23
Friday
24
Saturday
25
Sunday
26
Monday
27
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
0
0
6
3
2
2
1
0
0
3
3
0
2
3
4
4
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.8
SW
13
1.8
SW
12
1.9
SW
13
2.1
SW
12
4
SW
14
4
SW
14
4
SW
15
3
SSW
16
3
SSW
15
3
SSW
15
2.4
SSW
14
2.2
SSW
13
2.2
SW
12
1.9
SW
12
1.7
SW
11
1.5
SW
11
2.4
W
8
2.5
SW
10
3
WSW
12
2.5
SW
13
Wave Graph
Metric surfscale
Energy kJ
974
865
1285
1200
5810
5918
6339
4605
4136
3431
2216
1573
1434
1029
754
573
680
1300
3085
2088
Wind (km/h)
20
NW
25
SW
30
SW
20
SW
30
SSW
20
SSW
30
SSW
20
S
15
SW
20
WSW
20
WSW
25
WSW
20
SW
15
SSW
10
NNE
15
NW
10
N
15
N
10
NNW
20
NE
Wind State
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross
cross
cross-on
on
on
cross-on
cross-on
cross
cross-off
cross-on
cross
cross
cross-on
cross-off
High Tide
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
9:51PM0.06m
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
part cloud
rain showers
light rain
part cloud
light rain
part cloud
cloud
cloud
part cloud
cloud
cloud
rain showers
part cloud
light rain
cloud
part cloud
part cloud
part cloud
cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
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
1
1
1
2
2
Temp °C
16
16
13
13
13
13
12
12
12
13
13
14
14
14
14
15
14
14
15
15
Feels °C
13
13
6
8
7
7
5
6
7
8
8
9
10
10
12
12
12
11
12
12
  • Map Icons:
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  • 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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