Thirroul Surf Break

Lat Long: 34.32° S 150.93° E

Thirroul Surf Forecast and Surf Report

Issued: 3 am 16 Sep 2026 (local time)

Forecast update in  hr  min

Today's Thirroul sea temperature is
18.1°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 Sep 2026:

  • Best quality surf: Thursday 17 Sep, 7AM (local time) - 10ft (3.0m), 10s period, S swell with cross-offshore winds.
  • Most powerful swell: Wednesday 16 Sep, 10PM (local time) - 11ft (3.5m), 10s period, SSE swell with 2,507 kJ wave energy.
  • Next surfable swell (1★+): Thursday 17 Sep, 7AM (local time) - 10ft (3.0m), 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 Thursday (Sep 17) at 7AM. The primary swell is predicted to be 3.0m and 10s period with a secondary swell of 2.5m and 10s. Another secondary swell of 0.1m and 13s is also forecast. 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 3.5m 10s and forecast to arrive on Wednesday (Sep 16) 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 0.4m 3s period and expected on Friday (Sep 18) at 7PM.

Wave TypeTime (AEST) & Date Wave Height & Period
Next good surf (1 star+) 7AM (Thu 17th Sep)10ft (3.0m) 10s
Best Surf 7AM (Thu 17th Sep)10ft (3.0m) 10s
Most Powerful10PM (Wed 16th Sep)11ft (3.5m) 10s

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


The Lowdown

G’day, Rusty here.

Look, the next couple of weeks are pretty average for Thirroul. We’ve got a bit of swell pushing through, but it’s mostly messy, and the winds are going to be a pain in the backside for most of it. It’s not all bad news though, there’s one real window where it cleans up and might be worth a paddle.

Right now, Wednesday the 16th is a write-off. There’s a decent 10ft of south swell, but that’s ridden by a fresh 30 km/h cross-shore wind. The water’s at 65°, which is pretty normal for this time of year, so no dramas there, but the surface is going to be lumpy and ugly. Not worth your time.

Thursday the 17th is a bit better, with the swell dropping to 8ft, but it’s still cross-shore and a bit lumpy. It’s more of a look-and-see day, but don’t expect much. The energy is moderate, sitting around 930.

Now, Friday the 18th is our standout. The wind drops out completely, going glassy in the morning with that 5ft SSE swell at a 9-second period. This is your best bet of the whole run – clean, smooth, and head-high-ish. It’s still a beach and reef setup, so the long period might make it a bit straight in places, but with those conditions, it’ll be the pick of the bunch. Definitely get out there early. The energy is moderate at 400.

After that, things fade out fast. Saturday and Sunday have tiny surf, under 3ft, and while the winds are light and glassy at times, it’s just too small to get excited about. The energy is weak, down around 97-188.

Then we hit a poor stretch from Monday the 21st through to early next week. The swell picks up again, but the winds turn onshore and cross-onshore, making a mess of it. Monday afternoon has 5ft but with a moderate cross-onshore, it’s chop city. Tuesday is the same story, with 6ft but poor quality. This stretch is best left alone. You’d almost have more fun watching the kites out there than fighting this slop.

The middle of next week, the 24th, is more of the same – onshore winds and poor conditions, with only small, weak swell. The 25th and 26th have some rain and fresh breezes, but it’s still messy and the swell direction swings around to the ENE and NE, which isn’t ideal for this spot.

The one other bright spot comes on Wednesday the 30th. It’s not big, only 4ft, but the wind goes offshore, and it’s clean. The swell is from the NE with a short 7-second period, so it’ll be a bit lumpy but rideable. Still, it’s not a patch on the Friday the 18th. The energy is weak at 218.

So, plain and simple: if you’re only surfing once in the next two weeks, make it Friday morning, the 18th. The rest is pretty ordinary. I’ve seen worse, but I’ve seen a lot better too.

Stay salty.

Rusty.

Short Range Forecast

Mostly dry. Warm (max 22°C on Fri morning, min 8°C on Wed night). Winds decreasing (fresh winds from the S on Wed afternoon, calm by Fri morning).

Days 4-6 Weather Summary

Light rain (total 4mm), mostly falling on Mon night. Warm (max 29°C on Sun morning, min 12°C on Mon night). Wind will be generally light.

Wednesday
16
Thursday
17
Friday
18
Saturday
19
Sunday
20
Monday
21
Tuesday
22
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
0
1
2
1
2
2
1
0
1
1
0
1
1
1
0
0
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)
3
S
10
3
S
10
3.5
SSE
11
2.3
SSE
10
1.9
SSE
9
1.6
SSE
9
1.4
SSE
9
1.3
SSE
9
0.8
S
9
0.7
S
9
0.6
S
9
0.7
S
10
0.9
S
8
0.4
SSE
18
0.6
S
10
0.7
S
12
1.6
SSE
8
1.6
SSE
7
1.9
SSE
7
1.4
SSE
7
1.2
SSE
8
Wave Graph
Metric surfscale
Energy kJ
1818
1643
2364
920
572
349
333
271
110
81
63
90
108
113
70
132
324
245
332
163
205
Wind (km/h)
30
SSW
30
S
25
SSW
15
S
10
E
10
WNW
0
E
10
NE
20
W
10
WSW
5
WNW
15
SW
5
NNW
5
NNE
10
NW
20
SSE
20
SE
20
S
20
S
20
SSE
15
SSE
Wind State
cross
cross-on
cross
cross
cross-on
off
glassy
cross
cross-off
cross-off
glassy
cross-off
cross-off
glassy
off
cross-on
cross-on
cross
cross-on
cross-on
cross-on
High Tide
11:17AM1.36m
11:46PM0.98m
12:02PM1.30m
00:43AM0.90m
12:58PM1.25m
1:57AM0.85m
2:06PM1.22m
3:21AM0.85m
3:17PM1.23m
4:28AM0.90m
4:18PM1.27m
5:18AM0.97m
5:08PM1.33m
Low Tide
5:56PM0.37m
5:23AM0.46m
6:56PM0.43m
6:08AM0.53m
8:07PM0.47m
7:08AM0.59m
9:23PM0.47m
8:26AM0.60m
10:27PM0.42m
9:42AM0.57m
11:15PM0.36m
10:42AM0.51m
11:53PM0.29m
part cloud
clear
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
part cloud
light rain
cloud
cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:54
5:54
5:52
5:50
5:50
5:48
5:47
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:46
5:47
5:49
5:49
5:50
5:51
5:51
 mm
4
Temp °C
15
15
12
15
15
10
22
21
18
27
26
19
29
27
21
23
18
15
14
14
14
Feels °C
7
7
5
12
12
8
19
19
13
25
24
15
26
26
17
19
16
12
10
9
11
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
Map placeholder
How to use the Wavefinder 
submit an eyeball surf report

Quick surf report for Thirroul:

join our community of surf reporters

FREE! Surf-Forecast.com widget for your website

The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Thirroul surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.


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.

Nearest locationNearest