Thirroul Surf Break

Lat Long: 34.32° S 150.93° E

Thirroul Surf Forecast and Surf Report

Issued: 3 am 26 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 25 Aug 2026:

  • Best quality surf: Friday 28 Aug, 4AM (local time) - 5ft (1.6m), 11s period, SSE swell with offshore winds.
  • Most powerful swell: Thursday 27 Aug, 7AM (local time) - 7ft (2.2m), 9s period, S swell with 736 kJ wave energy.
  • Next surfable swell (1★+): Thursday 27 Aug, 7PM (local time) - 4.5ft (1.4m), 9s 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 (Aug 27) at 7PM. The primary swell is predicted to be 1.4m and 9s period with a secondary swell of 0.4m 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 2.2m 9s and forecast to arrive on Thursday (Aug 27) at 7AM. 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 Tuesday (Sep 01) at 4AM.

Wave TypeTime (AEST) & Date Wave Height & Period
Next good surf (1 star+) 7PM (Thu 27th Aug)4.5ft (1.4m) 9s
Best Surf 4AM (Fri 28th Aug)5ft (1.6m) 11s
Most Powerful 7AM (Thu 27th Aug)7ft (2.2m) 9s

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


The Lowdown

Alright, this is Rusty, and I’m looking at what’s on the cards for the next couple of weeks here at Thirroul. It’s a beach and reef setup, and it’s gonna be a real mixed bag. We’ve got a bit of a wait for anything decent, so grab a coffee.

First up, the opening days are a write-off. Wednesday and Thursday are messy with onshore winds and choppy, poor surf. The energy is there but it’s all over the shop. We’re looking at a moderate combined energy (250) on Thursday arvo, but it’s a bumpy 5ft from the south with a short, weak period. Not worth paddling out for.

Thursday morning has a bit more size, 6ft, but it’s still cross-on and a bit raw. The energy jumps up (572), but the quality is marginal. Friday is similar, with a 5ft SSE swell and a bit more period (11 seconds) in the morning, but that cross-shore wind won’t do it any favours.

Now, here’s where it gets interesting. The standout is Saturday morning, 29th August. We’ve got a glassy, 4ft SSE groundswell with a solid 10-second period, and the combined energy is pumping at 775. With the wind dead flat, it’s going to be clean. This is the best bet of the whole run. For a surfer, this is where you want to be. The water temp is about average for this time of year, so no surprises there.

Sunday morning, 30th, is also nice with glassy conditions and 4ft of SSE swell, but the energy is a bit lower (276). Still a good session, but Saturday is the pick.

After that, things drop off. The start of the new week sees a tiny, long-period swell (17 seconds) on Monday morning, but it’s only 2ft with a moderate cross-shore. That long period makes it tricky for a beach break, but the reef might hold a little shape. Not much to write home about.

Tuesday, 1st September, is a bit of a consolation. Clean, small waves (3-3ft) from the SSE with an offshore wind. It’s mellow, but you’d be fighting for scraps.

Then we hit a real dry spell. From Wednesday, 2nd September, right through to the 5th, it’s tiny, weak, and mostly poor. The energy is dropping into the double digits (76, 59, 27). This is a real lull in the action.

There’s a flicker of life on Sunday, 6th September. The morning brings a clean 6ft from the south with a gentle offshore, but the period is short (7 seconds) and the wind picks up strong in the arvo, ruining it. The energy is back up (485), but it’s a short, dumpy swell.

The following week is a sad story. Mostly poor, blown-out surf. The only note is Thursday, 10th September, where we get a pulse of 8ft S swell with a clean cross-off wind. That’s big, expert-only territory, and the period is short (8 seconds), meaning it’ll be a bit of a close-out unless you’re on the reef. The energy is hefty (688), but it’s a rough, powerful wave.

So, to put it plain: Saturday morning, 29th August, is your day. Get on it. The rest of the two weeks is a mix of average, small, or blown-out. Stick to the glassy windows.

Rusty

Short Range Forecast

Light rain (total 3mm), mostly falling on Wed morning. Very mild (max 17°C on Fri morning, min 10°C on Thu night). Wind will be generally light.

Days 4-6 Weather Summary

Mostly dry. Very mild (max 19°C on Mon morning, min 12°C on Sat night). Wind will be generally light.

Wednesday
26
Thursday
27
Friday
28
Saturday
29
Sunday
30
Monday
31
Tuesday
1
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
0
0
2
2
1
2
2
0
2
1
0
2
2
1
2
1
0
1
1
1
1
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.9
NE
8
1.4
S
7
1.9
S
8
1.8
S
9
1.4
S
9
1.1
S
9
1.5
SSE
11
1.4
SSE
10
1.2
SSE
9
1.1
SE
10
1
SE
10
1
S
8
1.1
S
9
1.1
S
8
0.5
SSE
18
0.9
S
9
0.9
S
10
0.8
S
12
0.7
S
11
0.6
S
10
0.5
S
10
Wave Graph
Metric surfscale
Energy kJ
86
171
481
494
318
177
521
373
237
216
188
147
190
173
178
144
167
171
112
78
50
Wind (km/h)
20
SSW
20
S
10
S
10
S
5
E
10
NW
10
SSW
20
SSE
10
WSW
10
SSE
10
ESE
5
SW
5
SSE
10
E
5
W
5
NNE
15
NE
10
NW
10
NNW
5
NW
10
NW
Wind State
cross
cross-on
cross
cross-on
on
off
cross
cross-on
cross-off
cross-on
on
glassy
glassy
cross-on
off
cross
cross-on
cross-off
cross-off
glassy
off
High Tide
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
10:03AM1.38m
10:11PM1.34m
10:43AM1.41m
10:56PM1.23m
Low Tide
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
4:08PM0.25m
4:22AM0.18m
4:58PM0.28m
rain showers
part cloud
light rain
cloud
clear
clear
clear
clear
clear
part cloud
clear
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:22
6:22
6:20
6:20
6:18
6:16
6:16
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:32
5:32
5:34
5:35
5:35
5:36
5:37
 mm
2
1
Temp °C
16
16
13
14
15
11
17
15
13
16
15
13
17
16
13
19
18
13
25
24
18
Feels °C
13
12
10
12
13
9
14
11
12
13
13
12
14
14
13
16
14
11
21
22
16
  • Map Icons:
  • Break
  • 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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