Thirroul Surf Break

Lat Long: 34.32° S 150.93° E

Thirroul Surf Forecast and Surf Report

Issued: 3 pm 03 Sep 2026 (local time)

Forecast update in  hr  min

Today's Thirroul sea temperature is
17.7°C
0.2° 

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


Thirroul surf forecast from 3 Sep 2026:

  • Best quality surf: Tuesday 8 Sep, 7AM (local time) - 7.5ft (2.3m), 8s period, S swell with cross-offshore winds.
  • Most powerful swell: Thursday 10 Sep, 10AM (local time) - 8ft (2.5m), 10s period, S swell with 1,458 kJ wave energy.
  • Next surfable swell (1★+): Friday 4 Sep, 1AM (local time) - 1.5ft (0.4m), 10s period with SSE 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 Friday (Sep 04) at 1AM. The primary swell is predicted to be 0.4m and 10s period with a secondary swell of 0.4m and 7s. 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 2.5m 10s and forecast to arrive on Thursday (Sep 10) at 10AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.8m 6s period and expected on Sunday (Sep 06) at 7AM.

Wave TypeTime (AEST) & Date Wave Height & Period
Next good surf (1 star+) 1AM (Fri 4th Sep)1.5ft (0.4m) 10s
Best Surf 7AM (Tue 8th Sep)7.5ft (2.3m) 8s
Most Powerful10AM (Thu 10th Sep)8ft (2.5m) 10s

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


The Lowdown

Alright folks, Rusty here. Let’s have a look at what the next couple of weeks are serving up for our local patch. We’re looking at a pretty drawn-out period of small, wind-affected surf for the most part, but there are a few windows where it could get a bit more interesting, especially if you’re keen to get out when the conditions line up.

Right out of the gate, Thursday the 3rd is a write-off. There’s barely a ripple with a 2ft swell coming from the south, and the cross-off wind is making it pretty ordinary. We do get a proper burst of life on Friday morning the 4th. Thirroul is the only spot on the cards, and for that morning session, the stars nearly align. We’ve got a clean 4ft south swell with a 9-second period, and the wind is a light offshore from the WNW. The wave energy is moderate (232), and it’s looking like the best surf of the early window. The water is sitting at 64°, which is pretty much normal for this time of year.

Saturday the 5th and Sunday the 6th are messy. Saturday gets blown out by strong northerlies, and Sunday morning sees a bit more size at 4ft from the SSW, but that cross-shore wind and questionable tide make it only marginal. By Sunday afternoon, that swell jumps to 5ft from the south, but with a 12-second period, it’s got energy (646). The problem is the cross-onshore wind, so don’t expect anything clean.

Monday the 7th morning is another one to circle. Back to a cleaner setup – 4ft from the SSE with a light offshore from the northwest. Not a huge wave, but it should be glassy and clean. The energy is moderate (206).

Tuesday the 8th brings a bigger pulse – 7ft from the south in the morning, but it’s cross-onshore and fairly choppy. That’s pushing the limits for anything fun unless you’re after a bit of a challenge, but the wind is a big downside. The combined swell energy is strong (1027).

From Wednesday the 9th through the rest of the week, it’s a tale of building swell but with terrible wind. Wednesday and Thursday see solid south swells, with Thursday the 10th morning pumping out a 8ft south swell (10 seconds, very strong energy at 3111). But it’s blown out by a stiff southerly. This is one of those setups that looks better for kite surfing than paddle surfing – the wind and chop will be a major battle.

The following week is a bit of a mixed bag, but nothing really screams “go-time.” Friday the 11th through Sunday the 13th offers smaller, inconsistent waves with onshore junk. By Monday the 14th, we get a brief chance of cleaner conditions in the morning – 4ft from the northeast with a light offshore – but the period is short and the energy is only moderate (318). Later that afternoon it gets messy again with a bigger, short-period NE swell.

Thursday the 17th morning is the last potential highlight, but it’s over a week away. We’re looking at a clean 5ft south swell with a solid offshore, though the period is really short at 6 seconds, so the energy is moderate (217). It’ll be clean but maybe a bit weak and bouncy.

Overall, your best bet is Friday morning the 4th for a clean small-wave session. If you’re feeling brave and don’t mind chop, Thursday morning the 10th has the biggest swell of the period, but only for experienced surfers due to the size and wind. The rest of the time, you’re chasing small windows. Crowds at Thirroul are possible, so keep that in mind.

Stay patient, and check the forecast again closer to the weekend.

Rusty.

Short Range Forecast

Mostly dry. Warm (max 30°C on Sat morning, min 13°C on Thu night). Winds increasing (light winds from the WNW on Fri morning, fresh winds from the W by Sat night).

Days 5-7 Weather Summary

Light rain (total 2mm), mostly falling on Mon night. Warm (max 22°C on Mon morning, min 11°C on Sun night). Winds increasing (calm on Mon morning, fresh winds from the S by Wed morning).

Thu
3
Friday
4
Saturday
5
Sunday
6
Monday
7
Tuesday
8
Wednesday
9
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
0
0
0
1
0
2
2
0
0
2
1
1
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)
0.5
S
10
0.4
SSE
10
1.1
S
9
0.8
S
7
0.5
S
11
0.6
S
9
0.9
NE
6
0.7
NE
7
1.3
SSW
8
1.5
S
12
1.3
S
9
1.2
SSE
8
1
SSE
8
1.8
SSE
7
2.1
S
8
1.1
S
8
0.8
S
8
1.5
SSE
8
1.9
SSE
8
2.1
SSE
9
Wave Graph
Metric surfscale
Energy kJ
52
32
198
68
57
60
52
49
191
625
269
197
140
328
569
138
82
240
419
645
Wind (km/h)
20
W
15
WSW
5
WNW
10
NE
10
NW
20
N
25
NW
30
W
10
SSW
15
SE
5
WNW
5
NW
15
S
25
S
15
S
10
ENE
10
NW
30
SSW
30
S
30
S
Wind State
cross-off
cross-off
off
cross
off
cross-off
cross-off
cross-off
cross
cross-on
off
off
cross-on
cross
cross-on
cross-on
off
cross
cross-on
cross
High Tide
00:56AM1.01m
1:27PM1.40m
2:19AM0.94m
2:40PM1.42m
3:46AM0.95m
3:54PM1.47m
5:00AM1.00m
4:59PM1.53m
5:58AM1.09m
5:56PM1.59m
6:46AM1.18m
6:46PM1.62m
Low Tide
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
11:28AM0.35m
00:42AM0.07m
12:24PM0.27m
1:23AM0.03m
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
rain showers
clear
clear
clear
cloud
cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:11
6:09
6:09
6:07
6:05
6:05
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:37
5:38
5:39
5:39
5:40
5:42
5:42
 mm
2
Temp °C
22
15
22
21
16
30
28
20
19
17
14
22
17
14
16
16
13
15
15
14
Feels °C
17
10
19
19
14
25
23
16
14
14
13
20
14
10
14
14
10
8
8
6
  • 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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