Thirroul Surf Break

Lat Long: 34.32° S 150.93° E

Thirroul Surf Forecast and Surf Report

Issued: 3 pm 26 Aug 2026 (local time)

Forecast update in  hr  min

Today's Thirroul sea temperature is
18.0°C
0.6° 

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


Thirroul surf forecast from 26 Aug 2026:

  • Best quality surf: Thursday 27 Aug, 7AM (local time) - 7ft (2.1m), 9s period, S swell with glassy winds.
  • Most powerful swell: Thursday 27 Aug, 4AM (local time) - 7.5ft (2.3m), 9s period, S swell with 805 kJ wave energy.
  • Next surfable swell (1★+): Thursday 27 Aug, 7AM (local time) - 7ft (2.1m), 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 7AM. The primary swell is predicted to be 2.1m and 9s period with a secondary swell of 0.6m and 8s. Another secondary swell of 0.2m and 15s is also forecast. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Thirroul in the next 16 days are 2.3m 9s 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 Tuesday (Sep 01) at 1AM.

Wave TypeTime (AEST) & Date Wave Height & Period
Next good surf (1 star+) 7AM (Thu 27th Aug)7ft (2.1m) 9s
Best Surf 7AM (Thu 27th Aug)7ft (2.1m) 9s
Most Powerful 4AM (Thu 27th Aug)7.5ft (2.3m) 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 the outlook for the next couple of weeks at our local patch.

The pattern starts off a bit messy, with some cleaning up through the end of the week, and then we’ve got a couple of windows that look pretty promising. There’s a bit of a quiet spell after the weekend, but the end of the first week and into the second week holds some real interest.

We’ll kick it off at Thirroul. This spot is a beach-and-reef setup, exposed to the south-east.

Right now, Wednesday afternoon, it’s a bit of a write-off. We’ve got moderate cross-onshore winds from the south at 12 mph and 5 ft of choppy swell from the SSE with a short period of 7 seconds. The combined energy is weak at 271, so don’t get your hopes up.

Thursday morning cleans up a touch, but it’s still not great. The swell bumps up to 6 ft from the south, with a 9-second period, and it’s light cross-shore from the SSW at 6 mph. The energy jumps up to moderate (615), but the conditions are still marginal. Better in the arvo, with a glassy 4 ft of south swell and light onshore breeze, but the tide might be a factor.

Friday morning is where it starts to get good. We’ve got a clean 5 ft swell from the SSE with an 11-second period and a light cross-offshore breeze from the SW at 6 mph. The energy is strong at 607, and the conditions are looking very good. This is the standout of the first week – get on it early Friday before the wind shifts around to the SSE in the afternoon and chops it up.

The weekend is a mixed bag. Saturday morning has 5 ft of SE swell with a 10-second period, but there’s a light cross-onshore breeze. The energy is very strong at 1056, but that wind will kill the quality. Sunday morning brings a glassy 3 ft south swell with a 9-second period and zero wind. That’s clean, but a bit small.

Through the start of the new week, Monday and Tuesday, it gets small and weak. Swells drop under 3 ft, with clean conditions but the combined energy is down around 143 to 225. Surfable, but you’ll be hunting for scraps.

Now, looking further ahead. Thursday the 3rd of September is interesting. We’ve got an offshore breeze from the NW at 9 mph, with a small 2 ft swell from the SSE, but the period is a very long 19 seconds. That’s proper groundswell. The energy is moderate at 245, and with that light offshore wind, it could offer some clean, lined-up waves. It’s small but promising – a long-range standout worth keeping an eye on.

Then on Monday the 7th of September, the size comes back. Morning shows a 7 ft south swell with an 11-second period, cross-offshore wind from the WSW at 12 mph, and strong energy at 905. The afternoon bumps up to 6 ft from the SSE with a 13-second period, light onshore from the ESE, and very strong energy at 1254. This is bigger, more powerful swell. The morning looks cleaner with the offshore wind. For the experienced crew, that Monday morning session could be firing. Beginners – that 7 ft-plus is getting a bit big.

To wrap it, the best bet on offer is Friday morning, the 28th of August, with that clean, 5 ft SSE groundswell. The other real standout to pencil in is Monday the 7th of September for the bigger swell, especially the morning session with offshore winds. Later in the second week, Thursday the 10th of September morning also looks very clean with 5 ft south swell and a light offshore.

Keep your eyes peeled, the forecasts can change. But for now, that Friday morning looks like the pick of the bunch.

Stay stoked,
Rusty

Short Range Forecast

Light rain (total 2mm), mostly falling on Wed night. Very mild (max 17°C on Fri morning, min 10°C on Thu night). Wind will be generally light.

Days 5-7 Weather Summary

Mostly dry. Warm (max 26°C on Tue morning, min 11°C on Sun night). Wind will be generally light.

Wed
26
Thursday
27
Friday
28
Saturday
29
Sunday
30
Monday
31
Tuesday
1
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
0
2
2
1
2
3
0
2
3
1
2
2
0
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)
1.4
SSE
7
1.8
S
8
1.9
S
9
1.3
S
9
0.8
SSE
12
1.5
SSE
11
1.5
SSE
10
1.4
SSE
9
1.4
SE
10
0.9
SSE
10
0.9
SE
10
1
S
9
1.1
S
8
1
S
9
0.9
S
9
0.8
S
10
0.7
S
10
0.7
S
11
0.6
S
11
0.5
S
10
Wave Graph
Metric surfscale
Energy kJ
180
412
549
257
177
521
446
334
400
171
139
150
169
150
119
117
90
116
82
49
Wind (km/h)
20
S
10
S
10
SSW
5
E
10
NW
10
SSW
20
SSE
10
WSW
10
SSE
10
E
5
WSW
0
NNE
10
E
5
W
5
NNE
20
NE
10
NW
10
NNW
15
W
10
NNW
Wind State
cross-on
cross
cross
on
off
cross-off
cross-on
cross-off
cross-on
on
glassy
glassy
on
off
cross
cross
cross-off
cross-off
cross-off
cross-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
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
part cloud
light rain
light rain
clear
clear
clear
clear
part cloud
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
6:20
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
1
1
Temp °C
15
13
14
14
11
17
16
13
16
15
12
17
16
13
19
18
14
26
25
17
Feels °C
12
11
12
12
9
14
12
11
14
13
11
15
14
13
16
14
12
22
21
14
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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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