Thirroul Surf Break

Lat Long: 34.32° S 150.93° E

Thirroul Surf Forecast and Surf Report

Issued: 3 am 08 Sep 2026 (local time)

Forecast update in  hr  min

Today's Thirroul sea temperature is
17.8°C
0.3° 

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


Thirroul surf forecast from 7 Sep 2026:

  • Best quality surf: Friday 11 Sep, 1AM (local time) - 8ft (2.5m), 10s period, S swell with cross-offshore winds.
  • Most powerful swell: Wednesday 9 Sep, 10PM (local time) - 13ft (4.0m), 10s period, SSE swell with 2,754 kJ wave energy.
  • Next surfable swell (1★+): Tuesday 8 Sep, 10PM (local time) - 4.5ft (1.3m), 9s period with S swell.

Best Forecast Surf Conditions for Thirroul this week:

The surf forecast for Thirroul over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Sep 08) at 10PM. The primary swell is predicted to be 1.3m and 9s period with a secondary swell of 0.9m and 7s. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Thirroul in the next 16 days are 4.0m 10s and forecast to arrive on Wednesday (Sep 09) at 10PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 5s period and expected on Sunday (Sep 13) at 10PM.

Wave TypeTime (AEST) & Date Wave Height & Period
Next good surf (1 star+)10PM (Tue 8th Sep)4.5ft (1.3m) 9s
Best Surf 1AM (Fri 11th Sep)8ft (2.5m) 10s
Most Powerful10PM (Wed 9th Sep)13ft (4.0m) 10s

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


The Lowdown

Rusty here, talkin' about Thirroul. Look, the next couple of weeks are a real mixed bag. We've got some solid swell coming, but the wind's gonna be our biggest enemy for a good chunk of it, keeping things a bit of a battleground. The real window of opportunity, the one that’s got me a little excited, is around next weekend and into the following week. Let's break it down.

The week kicks off with some size on Tuesday the 8th, but that 7ft SSE swell is being messed up by a cross-shore wind and there’s a bit of a lump on it, with a combined swell energy of 631 – moderate. It's surfable but you'll be fighting the chop. Not the best call.

Things get messy from Wednesday the 9th into Thursday the 10th. Wednesday afternoon pushes to a stormy 10ft from the south with a fresh cross-onshore wind – that's a 1167 energy, strong, but it's rough and lumpy. Thursday morning hits 12ft from the south with 3750 energy – that’s strong to very strong wave energy, but it's cross-shore chop again. That’s big, expert-only territory at 12ft, and the conditions won't be doing it any favours. A lot of closeouts for the average punter.

Friday the 11th drops back a touch, but it's still only marginal with onshore winds. Hang in there.

Now, here’s the first standout. Saturday morning, September 12th. We finally get a clean window. The swell is a more manageable 5ft from the SSE with a nice 11-second period – that’s some proper groundswell energy (511). But the magic is the light 10 km/h northerly, cross-offshore wind. The report says "clean," and I’m buying it. That'll turn Thirroul on. This is your best bet early on, and crowds are *possible* here, so get in early.

Sunday the 13th and Monday the 14th drop right off, with tiny 2ft to 3ft SSE swells. Nice and clean with offshore and glassy conditions, but just not enough power to get excited about.

We hit another dry spell mid-week, with a pathetic 1ft to 5ft on Tuesday the 15th. It's a write-off.

The next real standout is shaping up for Saturday, September 19th. The morning is a bit cloudy with a 6ft south swell and a cross-offshore wind, clean (energy of 726). But the afternoon is the one. We get a 6ft swell from the SSE with a 9-second period, and a light 15 km/h WNW offshore breeze. The report says "gentle offshore and clean" – that’s pure Thirroul, glassy faces. That's the session to pencil in.

Sunday the 20th holds some moderate 5ft to 6ft south swells with clean conditions from cross-offshore winds, but it’s a little windier, with energy around 495 to 641. Worth a look, but Saturday afternoon is the highlight.

After that, the forecast goes quiet into the third week with tiny, weak swells from the east and north-east with no real energy at all – a few days of flatness. Nothing worth chasing.

So, the two real standouts are Saturday the 12th morning for the clean, lined-up groundswell, and Saturday the 19th afternoon for that perfect offshore glass. Lock 'em in.

Stay wet, Rusty.

Short Range Forecast

Mostly dry. Very mild (max 16°C on Tue morning, min 9°C on Tue night). Winds increasing (light winds from the NE on Tue afternoon, fresh winds from the S by Wed afternoon).

Days 4-6 Weather Summary

Mostly dry. Warm (max 23°C on Sun morning, min 11°C on Fri night). Wind will be generally light.

Tuesday
8
Wednesday
9
Thursday
10
Friday
11
Saturday
12
Sunday
13
Monday
14
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
1
1
2
0
0
1
2
0
4
2
2
2
2
0
2
1
0
1
1
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)
2.2
SSE
8
1.8
SSE
8
1.1
S
8
0.8
S
8
3
SSE
8
3
S
10
2.5
S
10
2.5
S
10
2.5
S
10
2
SSE
10
1.7
SSE
10
1.4
SSE
9
1.2
SSE
11
1
SSE
10
0.8
SSE
10
0.8
SSE
9
0.7
S
9
0.7
S
10
0.7
S
12
0.6
S
11
0.5
S
10
Wave Graph
Metric surfscale
Energy kJ
629
460
173
84
984
1975
1303
1300
1447
698
528
322
308
218
122
113
85
94
132
83
52
Wind (km/h)
20
S
10
ESE
10
NW
20
SSW
30
S
25
SSW
25
SSW
25
S
15
SW
10
S
10
ESE
5
W
10
NNW
25
NE
10
NW
10
N
20
NE
10
NW
10
WNW
5
N
15
SSW
Wind State
cross
on
off
cross
cross-on
cross
cross
cross-on
cross-off
cross
on
cross-off
cross-off
cross
off
cross-off
cross
off
off
cross-off
cross
High Tide
5:56PM1.59m
6:46AM1.18m
6:46PM1.62m
7:28AM1.27m
7:32PM1.61m
8:08AM1.35m
8:15PM1.56m
8:46AM1.41m
8:57PM1.46m
9:23AM1.44m
9:37PM1.35m
9:59AM1.44m
10:18PM1.22m
Low Tide
11:28AM0.35m
00:42AM0.07m
12:24PM0.27m
1:23AM0.03m
1:15PM0.21m
2:01AM0.03m
2:02PM0.17m
2:37AM0.06m
2:48PM0.16m
3:10AM0.12m
3:33PM0.18m
3:42AM0.20m
4:18PM0.23m
clear
clear
clear
cloud
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
rain showers
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:05
6:05
6:03
6:01
6:01
5:58
5:58
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:42
5:42
5:43
5:44
5:45
5:45
5:45
 mm
1
Temp °C
16
15
11
15
14
13
15
15
13
17
16
12
21
19
13
23
21
16
27
26
20
Feels °C
13
13
9
10
7
5
9
9
10
15
15
12
17
15
12
18
17
14
25
24
18
  • 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 Thirroul Surf forecast

The above surf forecast table for Thirroul provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Thirroul can be found by selecting the local surf guide option on the grey menu. Our Thirroul 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 (Thirroul) 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 Thirroul 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 Illawarra? If you are looking for accommodation near Thirroul, camping, hotels and holiday cottages in Illawarra, consider staying in Wollongong which is 12 km (7 miles) away. Other places in and around Illawarra where you can find information about places to rent, and car hire include Port Kembla which is 19 km (12 miles) away, Engadine, Cronulla and Caringbah.

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