Flatrock Surf Break

Lat Long: 34.68° S 135.32° E

Flatrock Surf Forecast and Surf Report

Issued: 8 pm 03 Aug 2026 (local time)

Forecast update in  hr  min

Today's Flatrock sea temperature is
15.3° 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 3 Aug 2026:

  • Best quality surf: Monday 10 Aug, 3AM (local time) - 20ft (6.0m), 16s period, SW swell with onshore winds.
  • Most powerful swell: Monday 10 Aug, 3AM (local time) - 20ft (6.0m), 16s period, SW swell with 18,869 kJ wave energy.
  • Next surfable swell (1★+): Tuesday 4 Aug, 3AM (local time) - 7ft (2.1m), 12s 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 (Aug 04) at 3AM. The primary swell is predicted to be 2.1m and 12s period with a secondary swell of 0.9m and 16s. The wind is predicted to be glassy 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 Monday (Aug 10) at 3AM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 3s period and expected on Wednesday (Aug 05) at 3AM.

Wave TypeTime (ACST) & Date Wave Height & Period
Next good surf (1 star+) 3AM (Tue 4th Aug)7ft (2.1m) 12s
Best Surf 3AM (Mon 10th Aug)20ft (6.0m) 16s
Most Powerful 3AM (Mon 10th Aug)20ft (6.0m) 16s

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


The Lowdown

Alright, let’s get into it. This is your local surf outlook for the Flatrock area, brought to you by Rusty.

First up, we’ve got a solid run of swell coming through, but it’s not all smooth sailing. The water temp is about average for this time of year, so nothing wild there. The main event is a long-period SW groundswell that’s going to keep things interesting, but you’ll need to pick your windows carefully.

The week kicks off with a fantastic Tuesday morning at Flatrock. You’re looking at clean 7 ft SW swell with a 15-second period, and glassy conditions from a light NNE breeze. The combined energy is strong (2092), and this is excellent for experienced surfers. The afternoon holds up just as well with 6 ft and glassy conditions.

Wednesday morning is still rideable with 4 ft SW swell, but that cross-on wind from the NNW will mess with the surface a bit. By the afternoon, the wind kicks up to 12 mph, making it choppy and marginal. Thursday is a winner again though – clean 5 ft from the SSE in the morning, building to 7 ft in the afternoon with a light S breeze. The energy is moderate to strong (2456), and the waves are clean. This is a standout window.

Friday sees the swell push up to 8 ft, but the wind is cross-shore and strong, so it’s going to be a bit of a mess. Solid energy (6131) but not worth it unless you’re desperate. Saturday and Sunday are a write-off with howling winds and onshore conditions. The swell is big, 13 ft on Sunday, but it’s a complete washout – that’s kite-surfing territory, not paddle surfing.

The first half of the second week is a bust. Monday the 10th through Wednesday the 12th sees massive swell, but the wind is either onshore or strong cross-shore. On Wednesday the 12th, the swell hits 20 ft with energy through the roof (26466), but it’s way too big for this break and only for the most experienced. Thursday the 13th still has 13 ft, but the wind is turning more cross-on and light, so it’s still marginal.

Friday the 14th and Saturday the 15th offer a bit of hope. Friday morning has 8 ft SSW swell, but the wind is onshore. Saturday morning, however, is a real standout for the second week. You’ve got a clean 6 ft SW swell with a 16-second period, and a light cross-offshore breeze from the NNE. The energy is strong (2525), and the conditions are clean. This is the best day in the second week.

Sunday the 16th is back to choppy with cross-winds, and Monday the 17th is marginal. But then, on Tuesday the 18th, we get a real treat. Offshore wind from the E, 10 ft SW swell with a 17-second period, and energy is very strong (5432). This is exceptional for experts, and it’s the highlight of the whole outlook. The morning is glassy and clean. By Wednesday the 19th, the swell drops back to 7 ft, but the wind is cross-shore, so it’s just okay.

So, the best on offer: Tuesday the 4th is a solid start, Thursday the 6th is clean and building, and Tuesday the 18th is a late-period gem with offshore winds. Keep an eye on that one.

Rusty

Short Range Forecast

Mostly dry. Very mild (max 14°C on Wed morning, min 11°C on Tue night). Wind will be generally light.

Days 5-7 Weather Summary

Moderate rain (total 15mm), heaviest on Fri night. Very mild (max 18°C on Fri afternoon, min 10°C on Sat night). Winds increasing (light winds from the ENE on Fri afternoon, gales from the WSW by Sat night).

Tuesday
4
Wednesday
5
Thursday
6
Friday
7
Saturday
8
Sunday
9
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
3
4
4
3
3
1
3
4
4
5
5
3
0
0
0
0
0
0
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
2.2
SW
13
2.1
SW
15
1.8
SW
15
1.2
SW
15
1.1
SW
19
1.6
SW
18
1.7
SW
16
1.6
SW
16
2.2
SW
16
3
SW
15
2.5
SW
17
2.5
SW
17
2.3
SW
16
2.3
SW
16
2.3
SW
15
3.5
WSW
15
4
SW
13
4
SW
16
4
SW
18
Wave Graph
Metric surfscale
Energy kJ
1584
1885
1377
614
828
1652
1492
1350
2434
3557
3950
3556
2742
2687
2520
4970
5283
7714
9758
Wind (km/h)
10
S
5
NNE
5
W
20
NE
5
NNW
20
NNW
10
WSW
15
SSE
10
S
15
ENE
20
N
15
NNW
35
N
55
N
40
NW
55
W
45
WSW
45
W
35
W
Wind State
cross
glassy
glassy
cross-off
cross-on
cross-on
cross-on
cross-off
cross-off
cross-off
cross
cross
cross
cross
cross-on
on
on
on
on
High Tide
3:20AM0.41m
3:05PM0.41m
3:56AM0.42m
3:05PM0.34m
4:40AM0.42m
2:26PM0.30m
5:50AM0.40m
10:26AM0.43m
11:28AM0.50m
Low Tide
9:11AM0.11m
9:24PM0.05m
9:50AM0.18m
9:31PM0.05m
10:37AM0.25m
9:30PM0.05m
9:16PM0.04m
8:51PM0.03m
8:33PM0.03m
cloud
part cloud
clear
part cloud
cloud
part cloud
clear
clear
clear
clear
cloud
cloud
light rain
light rain
rain showers
mod rain
cloud
cloud
rain showers
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:20
7:18
7:18
7:18
7:16
7:16
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:49
5:50
5:50
5:51
5:52
5:52
 mm
3
3
3
6
1
Temp °C
13
12
12
12
14
14
14
14
14
13
15
18
16
13
16
13
13
14
14
Feels °C
10
10
10
7
10
10
11
12
11
10
9
14
12
4
9
2
3
5
6
  • 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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