Thirroul Surf Break

Lat Long: 34.32° S 150.93° E

Thirroul Surf Forecast and Surf Report

Issued: 9 pm 03 Sep 2026 (local time)

Forecast update in  hr  min

Today's Thirroul sea temperature is
17.7°C
0.2° 

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


Thirroul surf forecast from 3 Sep 2026:

  • Best quality surf: Sunday 6 Sep, 10PM (local time) - 6.5ft (2.0m), 10s period, S swell with cross-offshore winds.
  • Most powerful swell: Thursday 10 Sep, 4AM (local time) - 10ft (3.0m), 10s period, S swell with 1,600 kJ wave energy.
  • Next surfable swell (1★+): Friday 4 Sep, 7AM (local time) - 4ft (1.2m), 10s 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 Friday (Sep 04) at 7AM. The primary swell is predicted to be 1.2m and 10s period with a secondary swell of 0.4m and 8s. The wind is predicted to be offshore as the swell arrives.

The most powerful waves expected at Thirroul in the next 16 days are 3.0m 10s and forecast to arrive on Thursday (Sep 10) at 4AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.2m 6s period and expected on Sunday (Sep 06) at 7AM.

Wave TypeTime (AEST) & Date Wave Height & Period
Next good surf (1 star+) 7AM (Fri 4th Sep)4ft (1.2m) 10s
Best Surf10PM (Sun 6th Sep)6.5ft (2.0m) 10s
Most Powerful 4AM (Thu 10th Sep)10ft (3.0m) 10s

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


The Lowdown

Alright, Rusty here. Let’s break down what’s coming down the line for us.

Straight up, the next two weeks aren’t going to set the world on fire, but there are a couple of clean, glassy windows that will make it worth schlepping down to the beach. The first week has some tricky conditions, but towards the end and into the second week, we get a couple of real gems.

We kick off on Friday, the 4th of September. The morning looks okay with a 3ft swell from the south, a period of 9 seconds, and a light cross-offshore wind. The combined energy is moderate (214). It’s clean, but nothing to write home about. By the afternoon, it drops off fast and the wind swings, so don’t plan your day around it.

Saturday the 5th is small and weak, with swell dropping to 2ft and 2ft. The wind is up, and it’s just not worth the paddle.

Sunday the 6th is a total write-off. The morning is tiny with a 2ft swell from the northeast, and the afternoon gets a bit of size (3ft) but it’s onshore and choppy.

Now, Monday the 7th – this is a standout. Early morning, the wind goes glassy, dead calm, and we’ve got a 4ft south swell wrapping in with moderate energy (214). It’s clean, it’s glassy, and it’s going to be fun. The only catch is it’s a beach and reef setup, and the swell period is 8 seconds, so it’s a bit shorter period, but that glassy wind will make it rideable. Crowds are possible here, so get in early.

Tuesday the 8th gets a bit chunky. The morning sees a 8ft south swell, but the wind is cross-onshore and the energy is strong (1338). That’s expert territory, and the conditions are marginal. The afternoon is a bit smaller at 4ft, but still onshore. Not the best for a paddle.

Wednesday the 9th and Thursday the 10th are messy. Thursday is particularly nasty with an 8ft south swell and strong onshore winds, energy hitting 1872 and 3054. That’s a lot of juice, but it’s going to be a washing machine. For the experienced, maybe a look, but it’s more of a kite-surfing setup than a clean paddle session.

Friday the 11th is still big and lumpy, with a 7ft south swell in the morning. The wind is cross-shore, so it’s not completely blown out, but it’s not clean.

Saturday the 12th of September – this is the real highlight. Morning session, we get glassy conditions again. A 4ft swell from the south-southeast, period of 11 seconds, and the energy is moderate (437). The wind is dead calm, glass. That’s a proper groundswell, and it’s going to be clean, lined up, and fun. The longer period (11 seconds) means better shape and more energy between sets. This is the session to aim for.

Sunday the 13th and Monday the 14th are small and weak again, with swell dropping below 3ft. Not much to get excited about.

Tuesday the 15th of September, the morning looks promising again. A 4ft swell from the south with a clean offshore wind from the west-northwest. The energy is moderate (274). That’s a clean, offshore morning with some size. The period is 8 seconds, so not a long-period groundswell, but it’ll be fun and hollow.

The rest of the second week, from Wednesday the 16th onward, is a bit of a fade. The swell sticks around 3ft to 3ft, but the wind gets up and by Thursday the 17th and Friday the 18th, it’s a full-on onshore gale. Strong breeze and messy conditions. Energy is moderate to strong (647-771) but it’s all wind and chop. Not worth it.

So, to wrap it up: Monday the 7th and Saturday the 12th are your best windows. Both have glassy mornings, clean surf, and enough swell to get some proper waves. The 12th has the edge with a longer period swell (11 seconds) and moderate energy (437). If you’ve got a free morning, that’s the one.

The water temperature is about average for this time of year, so no need to dig out the thickest rubber just yet.

Stay stoked, and I’ll see you out there.

Rusty.

Short Range Forecast

Mostly dry. Warm (max 31°C on Sat morning, min 13°C on Thu night). Wind will be generally light.

Days 5-7 Weather Summary

Light rain (total 2mm), mostly falling on Mon night. Warm (max 21°C on Mon morning, min 10°C on Tue night). Winds increasing (calm on Mon morning, fresh winds from the S by Wed afternoon).

Friday
4
Saturday
5
Sunday
6
Monday
7
Tuesday
8
Wednesday
9
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
0
2
0
1
0
0
0
0
0
2
2
1
0
1
1
2
1
0
1
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.4
SSE
10
1
S
9
0.7
S
8
0.5
S
10
0.6
S
9
0.5
S
9
0.6
NE
7
0.5
NE
7
1
S
11
1.5
S
8
1.2
S
8
1.1
SSE
8
2
SSE
8
2.3
S
8
1.3
S
8
1
S
8
0.9
S
8
1.7
SSE
7
3
S
9
Wave Graph
Metric surfscale
Energy kJ
32
175
55
56
58
43
37
24
229
324
205
149
450
727
208
140
95
302
1386
Wind (km/h)
20
WSW
5
W
5
NNE
10
NW
15
N
25
NW
25
W
15
WSW
20
SSE
10
WSW
5
NNW
10
E
20
S
15
S
10
ESE
10
NW
10
SW
25
S
30
SSW
Wind State
cross-off
cross-off
cross
off
cross-off
cross-off
cross-off
cross-off
cross-on
cross-off
glassy
on
cross-on
cross-on
on
cross-off
cross-off
cross
cross
High Tide
00:56AM1.01m
1:27PM1.40m
2:19AM0.94m
2:40PM1.42m
3:46AM0.95m
3:54PM1.47m
5:00AM1.00m
4:59PM1.53m
5:58AM1.09m
5:56PM1.59m
6:46AM1.18m
6:46PM1.62m
Low Tide
6:40AM0.40m
8:25PM0.34m
7:50AM0.45m
9:47PM0.30m
9:09AM0.46m
10:57PM0.22m
10:24AM0.42m
11:54PM0.14m
11:28AM0.35m
00:42AM0.07m
12:24PM0.27m
1:23AM0.03m
clear
clear
clear
part cloud
clear
part cloud
clear
clear
clear
clear
clear
clear
rain showers
part cloud
clear
clear
part cloud
cloud
light rain
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:11
6:09
6:09
6:07
6:05
6:05
<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
 mm
2
3
Temp °C
15
21
21
16
31
28
19
20
18
14
21
18
15
16
16
12
19
16
13
Feels °C
10
18
19
14
26
23
15
16
14
13
18
16
12
12
14
10
16
11
6
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  • 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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