Thirroul Surf Break

Lat Long: 34.32° S 150.93° E

Thirroul Surf Forecast and Surf Report

Issued: 3 am 29 Aug 2026 (local time)

Forecast update in  hr  min

Today's Thirroul sea temperature is
17.9°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 28 Aug 2026:

  • Best quality surf: Saturday 29 Aug, 7PM (local time) - 3ft (0.9m), 9s period, SE swell with glassy winds.
  • Most powerful swell: Saturday 29 Aug, 10AM (local time) - 4ft (1.2m), 9s period, SSE swell with 226 kJ wave energy.
  • Next surfable swell (1★+): Saturday 29 Aug, 7PM (local time) - 3ft (0.9m), 9s period with SE 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 Saturday (Aug 29) at 7PM. The primary swell is predicted to be 0.9m and 9s period with a secondary swell of 0.8m 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 1.2m 9s and forecast to arrive on Saturday (Aug 29) at 10AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 3s period and expected on Saturday (Sep 05) at 7AM.

Wave TypeTime (AEST) & Date Wave Height & Period
Next good surf (1 star+) 7PM (Sat 29th Aug)3ft (0.9m) 9s
Best Surf 7PM (Sat 29th Aug)3ft (0.9m) 9s
Most Powerful10AM (Sat 29th Aug)4ft (1.2m) 9s

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’s on the cards for the next couple of weeks.

We’re in for a pretty quiet run, to be honest. There’s a gap of surfable days right at the start before we get into anything worthwhile. The first real action is looking at Sunday morning, the 30th of August. That’s our first little standout. Thirroul will be tiny, with only 3 ft of swell from the S, but the wind goes glassy, dead calm. That’s a major positive. It’ll be clean as a whistle, but don’t expect much push. The combined energy of all swells directed here is weak (211). It’s a morning session for the longboard or a log, just to get wet.

Then we have a decent stretch of small, clean peaks from Monday morning through to Tuesday morning. Monday the 31st sees 3 ft from the S with a light cross-off wind from the NNW. Clean, but very ordinary. On Tuesday the 1st of September, the swell drops to 3 ft again, but the period stretches out to 11 seconds. That’s a longer period groundswell, so the waves will have more shape, more energy (214), and longer waits between sets. That’s actually a nice trade-off for a small day. Light cross-off NNW wind again. Worth a paddle.

The real standout, though, is shaping up for Sunday the 6th of September. The morning shows 4 ft of S swell building with a clean offshore wind from the WNW. The combined energy bumps up to a moderate 201. Then the afternoon gets even better: 4 ft from the S, period hitting 11 seconds, and the combined energy jumps to a strong 318. Wind goes light and variable, almost glassy. That Sunday afternoon is the pick of the lot—clean, solid energy, and a proper long-period swell. Expect better shaped waves and longer lulls, which makes paddling back out easier.

A word of caution: On Tuesday the 8th of September, the swell jumps to 10 ft from the SSW. That’s way too big for beginners, and with a fresh cross-shore wind and lumpy chop, that’s for experts only, if anyone. The combined energy is a massive 1980, which is very strong. That whole Tuesday and Wednesday (the 9th) look messy and big. Not a paddle surfer’s dream.

The water temperature is sitting at 64°F with a small anomaly of 0.9°F, so it’s about average for this time of year at Thirroul. No surprises there.

So, to wrap it up: the best bet is Sunday morning the 30th for a glassy, tiny clean-up, and the absolute standout is Sunday the 6th of September, afternoon session. The long-range stuff for the 12th and 13th looks promising but less certain, with clean conditions and moderate energy. Keep an eye on it.

Rusty.

Short Range Forecast

Mostly dry. Warm (max 21°C on Mon morning, min 10°C on Sat night). Wind will be generally light.

Days 4-6 Weather Summary

Mostly dry. Warm (max 26°C on Wed morning, min 12°C on Thu night). Wind will be generally light.

Saturday
29
Sunday
30
Monday
31
Tuesday
1
Wednesday
2
Thursday
3
Friday
4
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
1
2
2
0
2
1
0
1
2
0
1
0
1
1
1
0
1
1
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)
1.2
SSE
9
1.1
SE
10
0.9
SE
9
0.8
S
9
0.9
S
9
1
S
9
0.9
S
8
0.8
S
9
0.9
S
10
0.9
S
11
0.8
S
11
0.7
S
10
0.6
S
10
0.6
S
10
0.5
S
10
0.5
S
10
0.4
SSE
9
0.4
SSE
11
0.8
SSE
9
0.3
SSE
12
0.4
S
9
Wave Graph
Metric surfscale
Energy kJ
226
207
123
99
127
169
90
110
145
188
146
98
68
70
49
47
28
40
103
26
26
Wind (km/h)
5
SSE
10
ESE
5
WNW
0
S
10
SE
5
WNW
10
N
15
NE
5
WNW
10
NNW
15
NNE
10
NW
15
NW
10
W
10
WNW
15
W
20
WSW
10
WSW
5
NNW
15
NNE
10
WNW
Wind State
cross-on
on
off
glassy
on
off
cross-off
cross-on
glassy
cross-off
cross
cross-off
cross-off
off
off
off
cross-off
cross-off
cross-off
cross
off
High Tide
8:52PM1.50m
9:26AM1.33m
9:30PM1.43m
10:03AM1.38m
10:11PM1.34m
10:43AM1.41m
10:56PM1.23m
11:28AM1.41m
11:50PM1.11m
12:22PM1.41m
00:56AM1.01m
1:27PM1.40m
2:19AM0.94m
Low Tide
2:40PM0.25m
3:16AM0.11m
3:22PM0.25m
3:48AM0.13m
4:08PM0.25m
4:22AM0.18m
4:58PM0.28m
5:01AM0.25m
5:55PM0.31m
5:45AM0.32m
7:04PM0.34m
6:40AM0.40m
8:25PM0.34m
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
part cloud
clear
clear
clear
clear
part cloud
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:20
6:18
6:16
6:16
6:13
6:13
6:11
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:35
5:35
5:36
5:37
5:37
5:37
5:38
 mm
Temp °C
16
16
12
18
16
13
21
19
14
24
22
17
26
26
19
24
23
14
22
22
16
Feels °C
14
15
12
15
14
13
18
16
14
20
19
15
22
23
17
20
18
11
19
18
11
  • 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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