Thirroul Surf Break

Lat Long: 34.32° S 150.93° E

Thirroul Surf Forecast and Surf Report

Issued: 9 pm 16 Aug 2026 (local time)

Forecast update in  hr  min

Today's Thirroul sea temperature is
17.8° C
0.4° 

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


Thirroul surf forecast from 16 Aug 2026:

  • Best quality surf: Wednesday 19 Aug, 1AM (local time) - 2ft (0.6m), 11s period, ESE swell with cross-offshore winds.
  • Most powerful swell: Wednesday 19 Aug, 4PM (local time) - 3.5ft (1.0m), 10s period, E swell with 192 kJ wave energy.
  • Next surfable swell (1★+): Tuesday 18 Aug, 1AM (local time) - 3ft (0.9m), 7s period with ESE 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 (Aug 18) at 1AM. The primary swell is predicted to be 0.9m and 7s period with a secondary swell of 0.5m and 8s. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Thirroul in the next 16 days are 1.0m 10s and forecast to arrive on Wednesday (Aug 19) at 4PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 3s period and expected on Friday (Aug 21) at 1AM.

Wave TypeTime (AEST) & Date Wave Height & Period
Next good surf (1 star+) 1AM (Tue 18th Aug)3ft (0.9m) 7s
Best Surf 1AM (Wed 19th Aug)2ft (0.6m) 11s
Most Powerful 4PM (Wed 19th Aug)3.5ft (1.0m) 10s

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


The Lowdown

G’day, I’m Rusty. Let’s have a look at what’s coming up for Thirroul over the next couple of weeks.

First off, we’ve got a bit of a flat spell to start. The first real recommendation doesn’t come in until Wednesday, August 19th, so that’s a solid couple of days of nothing worthwhile. From there, it’s a real mixed bag with only a couple of windows that are worth paddling out for.

Wednesday the 19th has a clean morning with light cross-offshore wind from the north at 6 mph. Swell is tiny at 2ft from the ESE with a 10-second period, and the combined energy is weak (153). It’s surfable, but very ordinary – you’ll be scratching for anything with shape.

Thursday the 20th is similar: clean again in the morning with a north-northwest cross-off breeze, but the swell drops further to 3ft from the east, period of 6 seconds, and the combined energy is down to just 53. Another day for the longboard or a walk on the beach.

Friday the 21st offers a clean afternoon with a NNW cross-off breeze, but we’re still looking at weak 3ft ENE swell with a 6-second period. Combined energy is only 88. Ordinary stuff.

Now, the first real standout is Tuesday the 25th. The morning session is looking glassy – dead calm, slight air from the SSW. The swell picks up to 5ft from the SSE with an 8-second period, and the combined energy jumps to 425. That’s moderate to strong energy (425). The break is Thirroul, a beach and reef, and it’s exposed to the SE, so this SSE swell will wrap in nicely. The water temperature is your typical late winter, nothing unusual for the time of year. The crowd can be around sometimes, so you might have company, but it’s worth it for the clean, glassy conditions and that energy.

Wednesday the 26th is another quality pick. Morning has a clean, moderate offshore breeze from the west-northwest at 16 mph. Swell is 3ft from the south with an 11-second period – longer period groundswell, which will favour the reef at Thirroul and give better shaped waves. Combined energy is strong at 350. The wind is moderate offshore, so clean faces. This is a solid session for the experienced surfer, as the wind is fresh.

After that, the options fade. The last decent mention is on Friday, August 29th morning, with a slight air and offshore west-northwest wind, but the energy is low at 116 from a short-period 3ft ENE swell. It’s surfable but nothing special. The outlook then trails off into September with weak, small swells and poor wind. Basically, we get two real windows – the 25th and 26th of August – and that’s your lot for the fortnight.

Rusty

Short Range Forecast

Moderate rain (total 18mm), heaviest on Sun night. Very mild (max 17°C on Wed morning, min 12°C on Tue night). Wind will be generally light.

Days 5-7 Weather Summary

Light rain (total 6mm), mostly falling on Fri afternoon. Warm (max 22°C on Thu morning, min 11°C on Fri night). Wind will be generally light.

Monday
17
Tuesday
18
Wednesday
19
Thursday
20
Friday
21
Saturday
22
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
0
0
0
1
0
0
2
1
0
1
1
0
0
0
1
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)
0.8
S
10
0.7
S
9
1
ESE
6
0.9
ESE
7
0.5
S
11
0.4
ESE
14
0.6
ESE
11
0.6
ESE
10
1
E
10
0.6
ESE
9
0.8
E
6
0.8
E
6
0.6
ENE
6
0.6
ENE
6
0.8
ENE
6
0.4
ENE
6
0.4
NE
6
0.4
NE
6
0.4
NE
6
Wave Graph
Metric surfscale
Energy kJ
122
81
78
68
57
61
102
82
192
53
51
50
29
31
49
15
10
10
10
Wind (km/h)
10
SE
10
SE
15
SE
0
WNW
5
ENE
10
ENE
10
NW
10
N
15
NE
10
NW
10
NNW
10
NE
10
W
5
WSW
10
N
10
WNW
10
WSW
15
SSE
5
WSW
Wind State
cross-on
on
on
glassy
cross-on
cross-on
cross-off
cross-off
cross-on
off
cross-off
cross
off
cross-off
cross-off
off
cross-off
cross-on
glassy
High Tide
10:47PM1.35m
11:24AM1.34m
11:31PM1.20m
12:07PM1.32m
00:18AM1.05m
12:56PM1.29m
1:14AM0.93m
1:51PM1.26m
2:26AM0.86m
2:55PM1.25m
3:47AM0.84m
4:00PM1.27m
Low Tide
5:04AM0.20m
5:34PM0.35m
5:39AM0.29m
6:30PM0.42m
6:15AM0.39m
7:35PM0.47m
6:58AM0.47m
8:49PM0.50m
7:53AM0.53m
10:06PM0.48m
9:01AM0.55m
11:09PM0.43m
rain showers
rain showers
rain showers
rain showers
light rain
part cloud
part cloud
clear
clear
clear
part cloud
cloud
part cloud
light rain
light rain
part cloud
clear
clear
rain showers
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:33
6:33
6:31
6:31
6:30
6:28
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:25
5:27
5:28
5:28
5:29
5:30
 mm
6
3
2
4
3
2
4
2
Temp °C
14
15
15
13
15
16
14
17
17
14
22
19
16
15
13
13
18
17
14
Feels °C
11
12
12
11
14
15
13
14
14
13
19
17
14
14
12
12
15
15
13
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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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