Thirroul Surf Break

Lat Long: 34.32° S 150.93° E

Thirroul Surf Forecast and Surf Report

Issued: 3 pm 22 Aug 2026 (local time)

Forecast update in  hr  min

Today's Thirroul sea temperature is
17.8°C
0.5° 

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


Thirroul surf forecast from 22 Aug 2026:

  • Best quality surf: Sunday 23 Aug, 4AM (local time) - 4.5ft (1.3m), 11s period, S swell with glassy winds.
  • Most powerful swell: Sunday 23 Aug, 4AM (local time) - 4.5ft (1.3m), 11s period, S swell with 388 kJ wave energy.
  • Next surfable swell (1★+): Sunday 23 Aug, 1AM (local time) - 2.5ft (0.8m), 11s 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 Sunday (Aug 23) at 1AM. The primary swell is predicted to be 0.8m and 11s period with a secondary swell of 0.3m and 6s. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Thirroul in the next 16 days are 1.3m 11s and forecast to arrive on Sunday (Aug 23) at 4AM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.3m 3s period and expected on Monday (Aug 24) at 4AM.

Wave TypeTime (AEST) & Date Wave Height & Period
Next good surf (1 star+) 1AM (Sun 23rd Aug)2.5ft (0.8m) 11s
Best Surf 4AM (Sun 23rd Aug)4.5ft (1.3m) 11s
Most Powerful 4AM (Sun 23rd Aug)4.5ft (1.3m) 11s

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


The Lowdown

Alright, Rusty here. Let's have a look at what Thirroul has got cookin' for us over the next couple of weeks. It's a mixed bag, but there are definitely a few windows where you'll want to be in the water.

First up, the water temp is sitting at 64°, which is pretty much bang on average for this time of year, so no surprises there.

We've got a bit of a slow start. Saturday the 22nd is flat as a tack with only 1ft of weak, short-period NE windswell and an onshore breeze. Not worth paddling out for.

Sunday the 23rd morning is where we get our first real look. A clean 4ft south swell pushing through with a light cross-offshore northerly. The energy is moderate (215), and it's a south swell hitting an exposed beach and reef. It's a bit on the small side, but it'll be clean and should offer a few fun ones for the intermediate crew. It gets a bit of a look-in. Sunday afternoon goes ugly with a strong cross-shore wind.

Monday the 24th morning is surfable but ordinary. Clean lines, but the swell has dropped to 2ft. Not really a standout.

The middle of the week is pretty average. We've got a bit of a bump on Tuesday morning, but it's short-period ENE windswell with weak energy. Wednesday is a write-off with strong winds and messy surf.

Now, let's talk about the real standout. Thursday the 27th morning. It's not big, with 4ft of south swell, but the magic is in the conditions. It's dead glassy. That's right, glassy. A light southerly breeze with the swell period at 8 seconds. The energy is solid at 253. This will be the cleanest, most user-friendly session of the week. The beach and reef setup at Thirroul will handle this nicely. If you've got a window, this is the one.

Friday the 28th morning is another good option. A clean 3ft south swell with a light cross-offshore WSW wind. The energy is still decent at 223. It won't be as good as Thursday, but it's a solid backup.

Looking into the second week, things get a bit more interesting. Saturday the 5th of September morning is one to circle on the calendar. We've got a very long-period, 21-second south swell pumping in. The energy is very strong at 512. Now, with a period that long, it's a true groundswell. It'll have heaps of push and shape, but at a beach and reef like Thirroul, it might wall up a bit straight. The kicker is it's glassy again, with a light northerly breeze. This is a promising, long-range standout. Keep an eye on it.

Sunday the 6th of September morning sees the swell size bump up to 5ft, but the period drops back to 8 seconds and the wind goes cross-shore. It looks a bit messy.

So, to sum it up: the best of the best is Thursday the 27th morning for those perfect, glassy conditions on a clean south swell. The second standout is that long-period pulse on Saturday the 5th of September morning, which could be something special if the conditions hold.

Rusty.

Short Range Forecast

Light rain (total 3mm), mostly falling on Sat night. Warm (max 22°C on Mon morning, min 12°C on Sun night). Wind will be generally light.

Days 5-7 Weather Summary

Light rain (total 9mm), mostly falling on Tue afternoon. Very mild (max 18°C on Fri morning, min 11°C on Thu night). Wind will be generally light.

Sat
22
Sunday
23
Monday
24
Tuesday
25
Wednesday
26
Thursday
27
Friday
28
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
0
1
2
0
1
1
0
1
1
0
1
0
0
0
2
0
2
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)
0.3
NE
6
0.8
S
11
1.1
S
8
0.7
S
12
0.9
S
10
0.7
S
10
0.6
S
10
0.9
ENE
6
0.7
ENE
6
1.3
NE
7
1
ENE
7
0.9
ENE
8
1.4
S
6
1.5
S
7
1.3
S
8
0.9
SSE
7
0.9
SSE
9
0.8
S
9
0.7
S
9
0.7
ENE
8
Wave Graph
Metric surfscale
Energy kJ
6
157
161
137
161
90
65
67
33
169
111
106
141
251
191
73
126
103
78
61
Wind (km/h)
10
ESE
0
E
5
N
20
NE
10
NNW
10
N
20
NE
5
NW
15
NNW
20
NNE
10
NW
20
SSW
25
S
20
S
5
S
10
ENE
10
WNW
5
WSW
20
SSE
5
WSW
Wind State
on
glassy
cross-off
cross
cross-off
cross-off
cross
off
cross-off
cross
off
cross
cross
cross
glassy
cross-on
off
cross-off
cross-on
cross-off
High Tide
4:57AM0.87m
4:57PM1.32m
5:49AM0.92m
5:45PM1.38m
6:31AM0.99m
6:26PM1.45m
7:08AM1.06m
7:04PM1.50m
7:42AM1.13m
7:41PM1.53m
8:16AM1.21m
8:16PM1.53m
Low Tide
11:09PM0.43m
10:09AM0.54m
11:58PM0.37m
11:07AM0.49m
00:37AM0.30m
11:56AM0.43m
1:12AM0.23m
12:39PM0.37m
1:44AM0.17m
1:19PM0.32m
2:15AM0.13m
1:59PM0.28m
2:45AM0.11m
clear
rain showers
part cloud
part cloud
clear
clear
part cloud
clear
cloud
light rain
light rain
thunderstorm
clear
part cloud
part cloud
clear
clear
clear
clear
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:26
6:26
6:24
6:22
6:22
6:20
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:30
5:30
5:30
5:31
5:32
5:32
5:34
 mm
3
5
2
2
Temp °C
18
14
16
17
13
22
19
15
21
17
16
16
17
15
16
16
13
18
16
13
Feels °C
16
14
13
13
11
19
16
15
19
15
16
13
13
12
14
14
12
14
13
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 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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