Thirroul Surf Break

Lat Long: 34.32° S 150.93° E

Thirroul Surf Forecast and Surf Report

Issued: 9 am 24 Aug 2026 (local time)

Forecast update in  hr  min

Today's Thirroul sea temperature is
18.0°C
0.7° 

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


Thirroul surf forecast from 24 Aug 2026:

  • Best quality surf: Monday 24 Aug, 7PM (local time) - 5ft (1.5m), 6s period, NE swell with cross-offshore winds.
  • Most powerful swell: Thursday 27 Aug, 4AM (local time) - 5.5ft (1.7m), 8s period, S swell with 383 kJ wave energy.
  • Next surfable swell (1★+): Monday 24 Aug, 7PM (local time) - 5ft (1.5m), 6s period with NE 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 Monday (Aug 24) at 7PM. The primary swell is predicted to be 1.5m and 6s period with a secondary swell of 1.0m and 6s. Another secondary swell of 0.6m and 10s 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 1.7m 8s and forecast to arrive on Thursday (Aug 27) 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 0.4m 3s period and expected on Wednesday (Aug 26) at 1AM.

Wave TypeTime (AEST) & Date Wave Height & Period
Next good surf (1 star+) 7PM (Mon 24th Aug)5ft (1.5m) 6s
Best Surf 7PM (Mon 24th Aug)5ft (1.5m) 6s
Most Powerful 4AM (Thu 27th Aug)5.5ft (1.7m) 8s

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


The Lowdown

Alright, Rusty here. Let’s have a look at what’s cookin’ at Thirroul for the next couple of weeks. Gotta be honest with ya, it’s a pretty bleak stretch of small, weak swell for the most part. The first real chance of anything decent is a long way off, so patience is the name of the game.

The water’s sitting at about 64°, which is pretty much bang on average for this time of year. No surprises there.

The pattern starts off flat and ordinary. Monday the 24th has a tiny 2ft swell from the south, period of 10 seconds, and the energy is weak to moderate (167). Morning has a light north breeze making it cross-off, so it’s clean but gutless. Afternoon gets worse with a 12 mph northeasterly chopping it right up. Not worth paddling out.

Tuesday the 25th is a bit of a nothing burger. We get a tiny bump in size to 3ft from the east-northeast, but the period is a short 6 seconds, so it’s all mush. The wind is light and clean in the morning, and it stays clean in the afternoon, but there’s no push. Not gonna get you out of bed.

Wednesday the 26th turns sloppy. A 3ft east-northeast swell with an 8-second period gets wrecked by a moderate south-southwest crosswind in the morning. By the afternoon, a 5ft south swell rolls in with a 7-second period, but it’s crossed-up and choppy with 16 mph south winds. The combined energy jumps to 303 (moderate), but you wouldn’t want to be out there. Not your day.

Thursday the 27th is marginal at best. We’ve got a 5ft south-southeast swell, 8-second period, and the energy is moderate at 308. The morning has a light south-southwest cross breeze, so it’s not totally blown out, but it’s not clean enough to get stoked on. Afternoon is a write-off with onshore easterly wind.

Friday the 28th morning – that’s your first real standout. A 3ft south swell, 9-second period, and the combined energy is moderate (215). But the key here is absolutely glassy conditions. Zero wind. That’s rare and special. For a beach-and-reef setup like Thirroul, that glassy surface will make the most of what’s on offer. The swell is from the south, which is the optimum direction for the break, and it’s a long-period groundswell that’ll wrap in nicely. This is likely the best wave you’ll see all week. Get out there. Crowds are possible, so don’t sleep in.

Saturday the 29th morning also has glassy conditions, with a 3ft south-southeast swell, 9-second period, and 198 energy. It’s clean and promising, but the swell direction is a little off the optimum. It’s surfable and pretty, but not quite as good as Friday.

After that, the outlook goes dead again. Sunday the 30th through to Tuesday the 1st of September, we’re looking at tiny waves under 2ft. There’s a weird spike on the 31st afternoon with a 1.0ft swell but an 18-second period – that’s an incredibly long period for almost no height, so it’ll just be a slow, fat bump with no real face to ride.

Then we hit a proper gap. From Tuesday 1st September all the way through to the end of the period, it’s a wasteland of 1ft to 2ft junk. The winds are clean for some of it, especially Wednesday afternoon and Friday afternoon with offshore or cross-off breezes, but the swell just isn’t there. The energy readings are mostly low, 47 to 158.

The one long-range hint that’s worth mentioning is Tuesday morning, September 8th. That’s more than a week away, so keep your expectations in check. The data shows a sudden jump to a 8ft swell from the south, 8-second period. That’s a lot of water (combined energy a very strong 1199), but an 8-second period means it’ll be a wall of close-interval, dumpy waves. At that size, this is for experienced surfers only. The wind is forecast to be a moderate west-southwest cross-off, so it’ll be clean. For a beach-and-reef break, this could turn into a bit of a washing machine. It’s more interesting for strong paddlers, but I’d say it looks more like a day for kite surfers than your average surfer, given the power and short period.

Bottom line: Friday 28th morning is your one true standout in the whole 16 days. Get it while it’s glassy. The rest is a long, quiet wait.

Rusty.

Short Range Forecast

Moderate rain (total 11mm), heaviest on Tue night. Warm (max 22°C on Mon morning, min 13°C on Wed night). Wind will be generally light.

Days 4-6 Weather Summary

Mostly dry. Very mild (max 17°C on Fri morning, min 10°C on Thu night). Wind will be generally light.

Monday
24
Tuesday
25
Wednesday
26
Thursday
27
Friday
28
Saturday
29
Sunday
30
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
2
1
1
1
0
0
1
1
0
2
2
0
2
1
1
1
0
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
1.7
NE
7
0.9
ENE
6
1
ENE
7
1.1
NE
8
0.9
ENE
8
1.5
S
7
1.6
S
8
1.4
SSE
8
1.1
S
7
1.2
S
11
1
S
9
0.8
SSE
11
1
SSE
9
1
SSE
9
1.1
SSE
9
0.7
SE
9
0.7
SSE
8
0.6
SSE
8
0.4
ENE
9
Wave Graph
Metric surfscale
Energy kJ
90
67
248
74
111
136
106
212
300
245
120
332
158
143
161
164
197
84
62
46
32
Wind (km/h)
10
N
20
NE
10
NW
10
NNW
15
N
10
NW
20
SSW
25
S
15
S
5
SSW
10
E
5
WNW
0
SW
15
SSE
5
WSW
5
NNE
10
E
10
WNW
5
NNE
15
NE
5
WNW
Wind State
cross-off
cross
cross-off
cross-off
cross-off
off
cross
cross-on
cross
cross
on
off
glassy
cross-on
cross-off
glassy
cross-on
off
cross
cross
off
High Tide
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
8:51AM1.27m
8:52PM1.50m
9:26AM1.33m
9:30PM1.43m
Low Tide
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
2:40PM0.25m
3:16AM0.11m
3:22PM0.25m
3:48AM0.13m
clear
clear
part cloud
light rain
light rain
light rain
rain showers
light rain
part cloud
cloud
clear
clear
clear
part cloud
clear
part cloud
clear
clear
part cloud
part cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:26
6:24
6:22
6:22
6:20
6:20
6:18
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:30
5:31
5:32
5:32
5:34
5:35
5:35
 mm
1
1
5
3
1
Temp °C
22
19
15
18
18
16
16
15
14
15
14
12
17
15
12
17
16
13
18
17
13
Feels °C
19
16
14
15
16
16
13
11
11
14
12
11
14
13
10
15
14
13
15
14
12
  • 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