Thirroul Surf Break

Lat Long: 34.32° S 150.93° E

Thirroul Surf Forecast and Surf Report

Issued: 9 pm 01 Sep 2026 (local time)

Forecast update in  hr  min

Today's Thirroul sea temperature is
17.7°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 1 Sep 2026:

  • Best quality surf: Monday 7 Sep, 4AM (local time) - 4ft (1.2m), 11s period, S swell with offshore winds.
  • Most powerful swell: Tuesday 8 Sep, 4PM (local time) - 7ft (2.1m), 7s period, NE swell with 382 kJ wave energy.
  • Next surfable swell (1★+): Wednesday 2 Sep, 4AM (local time) - 2ft (0.6m), 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 Wednesday (Sep 02) at 4AM. The primary swell is predicted to be 0.6m and 10s period with a secondary swell of 0.5m and 6s. 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 2.1m 7s and forecast to arrive on Tuesday (Sep 08) at 4PM. 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 4s period and expected on Saturday (Sep 05) at 4PM.

Wave TypeTime (AEST) & Date Wave Height & Period
Next good surf (1 star+) 4AM (Wed 2nd Sep)2ft (0.6m) 10s
Best Surf 4AM (Mon 7th Sep)4ft (1.2m) 11s
Most Powerful 4PM (Tue 8th Sep)7ft (2.1m) 7s

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


The Lowdown

Alright, Rusty here. Let’s have a look at your local stretch.

Honestly, for the next week and a bit, the surf is pretty quiet and ordinary. There’s a bit of swell but it’s mostly small and lacking any real punch to get excited about. We do have a few standouts later on, but you’ll need to be patient.

On Wednesday the 2nd, we’ve got a small 2ft south swell rolling in with a period of 10 seconds, but the wind is a messy cross-off, and the combined swell energy is just 109. It’s surfable but nothing you’d write home about. Thursday is much the same, with the swell dropping to 2ft and the combined energy down around 80-85. That afternoon, the wind picks up from the west at 20 km/h, which is cross-off and keeps things clean, but the waves are small and weak.

Friday the 4th morning, there’s a slight improvement. Still small at 2ft from the south, but the wind goes offshore from the west at 10 km/h, and the combined energy bumps up to 123. It’s still very ordinary – not worth paddling out for unless you’re desperate. That afternoon goes glassy with northerly wind at 5 km/h, but the swell drops to 2ft at only 7 seconds, and the energy plummets to 54. Weak.

Saturday the 5th is more of the same: 2ft, 9-second south swell, cross-off from the north at 10 km/h. Combined energy of 57. Really uninspiring.

Then we hit a dry spell Sunday the 6th through to Friday the 12th. Most of those days are onshore or cross-onshore, with bumpy or choppy conditions. There’s a bit of size on Sunday the 12th – a 5ft south swell that morning – but it’s accompanied by heavy rain and onshore easterly wind at 25 km/h, making it a complete mess. Combined energy of 360 means there’s power, but the quality is poor. That setup would be more fun for a kite surfer than a paddle surfer.

Now here’s where things get interesting. Sunday the 13th is the standout of this entire outlook. We get a south swell building to 6ft with a period of 8 seconds – not a long groundswell, but solid. The wind is cross-off from the north-northwest at 15 km/h, and the combined swell energy hits a strong 887. That’s proper wave energy, and at Thirroul, a beach-and-reef setup, this will hold some good lines. It’s in the intermediate-to-expert zone at that size, and given the exposure to a south swell, it’ll be pumping. The offshore direction is a little off the optimum south-east, but the conditions should be clean. Crowds are sometimes an issue here, so you might have company. This is the best on offer.

Sunday afternoon still has a solid 5ft swell and 378 combined energy, with the wind shifting to a lighter cross-off from the northwest. Still good, but the peak of the swell is in the morning.

The following week – from Monday the 14th onward – looks like it tails off again into smaller, onshore slop, with weak energy and poor conditions. Nothing to plan around out that far. If you want a wave, aim for the morning of Sunday the 13th.

Stay keen, but be ready to wait.

Rusty

Short Range Forecast

Mostly dry. Warm (max 26°C on Wed morning, min 13°C on Thu night). Wind will be generally light.

Days 5-7 Weather Summary

Mostly dry. Warm (max 26°C on Sat morning, min 10°C on Sun night). Winds decreasing (fresh winds from the WNW on Sat afternoon, calm by Mon afternoon).

Wednesday
2
Thursday
3
Friday
4
Saturday
5
Sunday
6
Monday
7
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
1
1
1
1
1
0
0
1
1
1
1
0
0
1
0
1
2
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)
0.7
S
10
0.6
S
10
0.6
S
10
0.5
S
10
0.5
S
10
0.5
S
10
0.4
SSE
10
0.7
S
10
0.5
S
7
0.4
SSE
11
0.5
S
9
0.4
S
9
0.3
S
9
1.1
S
11
0.9
S
9
1
S
8
1.2
S
10
0.9
S
9
1.5
NE
6
Wave Graph
Metric surfscale
Energy kJ
98
77
73
49
53
52
33
96
26
39
43
28
15
295
134
140
273
127
183
Wind (km/h)
10
NNW
15
NW
15
WSW
15
NW
10
SW
20
W
15
WSW
10
W
5
N
10
NW
10
N
30
WNW
15
W
5
SE
15
E
10
NNW
10
N
15
NE
10
SSW
Wind State
cross-off
cross-off
cross-off
off
cross-off
cross-off
cross-off
off
glassy
cross-off
cross-off
off
off
on
on
cross-off
cross-off
cross
cross
High Tide
10:56PM1.23m
11:28AM1.41m
11:50PM1.11m
12:22PM1.41m
00:56AM1.01m
1:27PM1.40m
2:19AM0.94m
2:40PM1.42m
3:46AM0.95m
3:54PM1.47m
5:00AM1.00m
4:59PM1.53m
Low Tide
5:01AM0.25m
5:55PM0.31m
5:45AM0.32m
7:04PM0.34m
6:40AM0.40m
8:25PM0.34m
7:50AM0.45m
9:47PM0.30m
9:09AM0.46m
10:57PM0.22m
10:24AM0.42m
11:54PM0.14m
part cloud
part cloud
clear
clear
clear
clear
clear
clear
clear
part cloud
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:13
6:13
6:11
6:09
6:09
6:07
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:37
5:37
5:38
5:39
5:39
5:40
 mm
Temp °C
17
26
26
19
24
23
15
22
22
15
26
22
20
18
16
12
21
20
14
Feels °C
14
22
23
16
19
18
10
19
20
13
20
16
17
14
13
10
18
18
12
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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 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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