Thirroul Surf Break

Lat Long: 34.32° S 150.93° E

Thirroul Surf Forecast and Surf Report

Issued: 9 am 11 Aug 2026 (local time)

Forecast update in  hr  min

Today's Thirroul sea temperature is
17.8° C
0.3° 

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


Thirroul surf forecast from 11 Aug 2026:

  • Best quality surf: Tuesday 11 Aug, 7PM (local time) - 5ft (1.5m), 11s period, S swell with offshore winds.
  • Most powerful swell: Tuesday 11 Aug, 7PM (local time) - 5ft (1.5m), 11s period, S swell with 536 kJ wave energy.
  • Next surfable swell (1★+): Tuesday 11 Aug, 7PM (local time) - 5ft (1.5m), 11s 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 Tuesday (Aug 11) at 7PM. The primary swell is predicted to be 1.5m and 11s period with a secondary swell of 0.5m and 10s. The wind is predicted to be offshore as the swell arrives.

The most powerful waves expected at Thirroul in the next 16 days are 1.5m 11s and forecast to arrive on Tuesday (Aug 11) at 7PM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.8m 4s period and expected on Wednesday (Aug 12) at 4AM.

Wave TypeTime (AEST) & Date Wave Height & Period
Next good surf (1 star+) 7PM (Tue 11th Aug)5ft (1.5m) 11s
Best Surf 7PM (Tue 11th Aug)5ft (1.5m) 11s
Most Powerful 7PM (Tue 11th Aug)5ft (1.5m) 11s

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


The Lowdown

Alright, mate, Rusty here. Let’s have a look at what’s cookin’ for Thirroul.

Right off the bat, I gotta be straight with you: the next couple of weeks are a bit of a mixed bag. There’s surf on offer, but it’s gonna take some patience to pick the right window. The water temp is sittin’ around 64°, which is about average for this time of year, so nothin’ wild there.

Straight up, Tuesday morning (11th August) is pretty flat and messy. We’re lookin’ at a weak 2ft S swell, with the energy at 199 – that’s light. The wind’s a cross-off from the west at 25 km/h, which keeps it sorta clean, but honestly, there’s not enough push to get excited about.

The first real glimpse of somethin’ worthwhile comes Wednesday morning (12th August). Swell picks up a touch to 3ft from the south, and we get a sweet offshore breeze from the WNW at 15 km/h. That’s clean surf. The wave energy is still modest at 222, but with that offshore wind, the lines should be tidy. It’s not gonna blow your mind, but it’s the best we got early on.

Friday morning (14th August) is another quiet standout. We’ve got 3ft of swell from the south, but the magic is in the wind – it’s glassy. A light 5 km/h breeze from the SW. That’s rare, mates. The energy is low at 173, but if you want a peaceful paddle on some clean little peelers, that’s your window. The spot’s fairly consistent and attracts a crowd *sometimes*, so you might get a few others, but it won’t be a zoo.

Now, there’s a disappointing run from Saturday (15th August) all the way through to the 24th of August. The swell bumps up a bit, but the wind turns onshore or cross-onshore most days, choppin’ it all up. The wave energy climbs into the 300s and even 800s (836 on the 23rd afternoon), but with strong winds from the SE and S, it’s just a messy, blown-out situation. For a beach-and-reef setup like this, with that much chop, it’s lookin’ more like a kite-surfing day than a paddle surfing day.

The one real standout in the long-range is Tuesday morning, 25th August. That’s the biggest pulse of the outlook – a solid 8ft south swell, with a cranked-up energy of 1834. That is serious power. But, I gotta warn ya, that size is expert territory only. The wind is cross-shore from the south at 20 km/h, so it’ll be a bit lumpy, but for a strong surfer, there’s a lot of juice in the water. The period is 9 seconds – not a long groundswell, so it won’t be too straight, but it’s gonna be a handful. That’s the one session to circle on your calendar if you’ve got the skills.

After that, Wednesday morning (26th August) drops right back down to 3ft and glassy conditions, but with energy down to 113, it’s just a gentle cleanup.

Overall, if you’re after the cleanest, most user-friendly waves, aim for Wednesday morning (12th August) with that offshore wind, or Friday morning (14th August) for the glassy dawny. The big stuff on the 25th is for the brave only.

Stay salty.

Rusty.

Short Range Forecast

Mostly dry. Very mild (max 19°C on Tue morning, min 8°C on Thu night). Wind will be generally light.

Days 4-6 Weather Summary

Moderate rain (total 12mm), heaviest on Sat night. Very mild (max 16°C on Fri morning, min 11°C on Fri night). Wind will be generally light.

Tuesday
11
Wednesday
12
Thursday
13
Friday
14
Saturday
15
Sunday
16
Monday
17
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
2
2
2
1
1
2
0
1
1
0
0
0
0
0
0
0
0
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)
0.7
ENE
10
1.6
S
10
1.3
S
10
1
S
9
0.8
S
9
0.7
S
8
1.1
S
8
1.3
S
8
0.8
SSE
7
0.9
S
8
0.9
SSE
8
1
S
7
1.8
S
7
1.6
S
7
1.3
SSE
6
1.6
SSE
6
1.6
SSE
7
1.7
SE
7
1.9
SE
8
1.6
ESE
7
1.8
ESE
7
Wave Graph
Metric surfscale
Energy kJ
89
556
352
170
95
63
165
223
63
108
96
89
320
255
147
191
229
287
382
263
334
Wind (km/h)
25
W
20
W
15
W
15
WNW
20
W
10
W
10
WSW
10
ESE
15
W
5
SW
10
SE
15
SSW
25
S
20
S
20
SE
20
SE
20
SE
15
SE
20
SE
20
SE
15
SE
Wind State
cross-off
cross-off
off
off
off
off
cross-off
on
cross-off
glassy
cross-on
cross
cross
cross-on
cross-on
cross-on
cross-on
on
on
on
on
High Tide
7:01PM1.73m
7:50AM1.17m
7:50PM1.75m
8:36AM1.23m
8:37PM1.72m
9:19AM1.29m
9:21PM1.63m
10:01AM1.32m
10:04PM1.51m
10:42AM1.34m
10:47PM1.35m
11:24AM1.34m
11:31PM1.20m
Low Tide
12:29PM0.28m
1:50AM-0.01m
1:23PM0.23m
2:34AM-0.04m
2:14PM0.20m
3:15AM-0.02m
3:03PM0.20m
3:53AM0.03m
3:52PM0.23m
4:29AM0.10m
4:42PM0.28m
5:04AM0.20m
5:34PM0.35m
clear
clear
clear
part cloud
clear
clear
clear
clear
clear
clear
clear
rain showers
part cloud
clear
rain showers
rain showers
rain showers
rain showers
rain showers
rain showers
rain showers
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:41
6:39
6:39
6:37
6:35
6:35
6:33
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:22
5:22
5:22
5:23
5:24
5:25
5:25
 mm
2
3
2
1
4
2
2
6
Temp °C
19
18
12
18
18
13
17
16
11
16
15
13
16
15
14
15
15
14
16
16
15
Feels °C
13
13
6
13
13
10
14
13
8
13
12
10
10
10
10
11
11
10
12
12
12
  • 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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