Thirroul Surf Break

Lat Long: 34.32° S 150.93° E

Thirroul Surf Forecast and Surf Report

Issued: 9 am 19 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 19 Aug 2026:

  • Best quality surf: Wednesday 19 Aug, 10PM (local time) - 4.5ft (1.4m), 6s period, NE swell with cross-offshore winds.
  • Most powerful swell: Wednesday 26 Aug, 7AM (local time) - 6ft (1.8m), 7s period, S swell with 348 kJ wave energy.
  • Next surfable swell (1★+): Wednesday 19 Aug, 10PM (local time) - 4.5ft (1.4m), 6s period with NE 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 Wednesday (Aug 19) at 10PM. The primary swell is predicted to be 1.4m and 6s period with a secondary swell of 1.0m and 6s. Another secondary swell of 0.7m and 9s is also forecast. 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 1.8m 7s and forecast to arrive on Wednesday (Aug 26) at 7AM. Winds are predicted to be cross-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 Tuesday (Aug 25) at 10AM.

Wave TypeTime (AEST) & Date Wave Height & Period
Next good surf (1 star+)10PM (Wed 19th Aug)4.5ft (1.4m) 6s
Best Surf10PM (Wed 19th Aug)4.5ft (1.4m) 6s
Most Powerful 7AM (Wed 26th Aug)6ft (1.8m) 7s

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


The Lowdown

G'day, Rusty here. Look, I've gotta be straight with you – the next couple of weeks at Thirroul are a bit of a mixed bag, with a lot of small, average days and a few bigger ones that'll be tricky to get clean. It's a beach and reef setup, and it's exposed to the swell, so it can catch anything going, but it needs the right wind to make it work.

We're starting off this Wednesday the 19th with nothing doing. Tiny 2ft swell from the ESE with a bit of cross-shore wind, it's just poor. Thursday the 20th morning is a little better with a bump to 3ft from the NE, and the wind is clean cross-off, so it's surfable, but it's short period at 6 seconds – not much push. The wave energy is moderate at 134 (in the hundreds). The water temp is 64°, which is about average for this time of year.

Friday the 21st is the best of the early days. The wind goes offshore from the WNW, and it's clean. The swell is 3ft from the NE, with a moderate energy of 120. It's not big, but it'll be clean and fun for a cruise on a log or a fish. The afternoon is even better with the same offshore wind and a touch more energy (120). It's nothing special, but it's the pick of the first week.

The weekend is a write-off. Saturday the 22nd is tiny and glassy in the morning, but the swell is only 2ft. Sunday the 23rd is worse with a cross-shore breeze. Monday the 24th is back to those small, clean 2ft waves, but it's just ordinary.

Now, we get a bit of a pulse mid-week. Tuesday the 25th has a 4ft swell from the NE in the afternoon, with offshore wind and clean conditions. The energy is up to 147 (moderate). It's still small, but it's the best wave of the week so far. Wednesday the 26th sees a bigger swell building from the S, 4ft, but the wind is 25 km/h cross-off, and while it's clean, the energy is jumping to 220 – it's getting a bit lumpy. The surf quality is still marginal.

The standout is Thursday the 27th. This is the one to circle. The swell is 5ft from the S, period is 8 seconds, and the wind is light cross-off from the W, making it clean. The energy is strong at 344 (three-digit). It's the best combo of size and conditions in the outlook. The morning and afternoon both look good. It's a solid, clean, fun-size S swell. This is your day.

After that, it settles back down. Friday the 28th is smaller at 4ft, clean but ordinary. Then Saturday the 29th gets chunky – 8ft to 8ft from the S, with a 9-second period, and the energy is huge (879–1053). But the wind is 25 km/h cross-off, and the surf quality is marginal. It's big, but it's a bit of a washing machine. This is getting into the "experts only" zone, and it's a beach and reef setup, so it might be better for the kite crew than a regular paddle.

Sunday the 30th is a write-off. A full-blown 10ft S swell with 35 km/h cross-onshore wind and energy through the roof (2564–4492). It's a mess. Monday the 31st is still big (8ft) with a 11-second period, but the wind is cross-shore, and it's marginal. The long period from the SSE means it'll be better on the reef than the beach, but the conditions are average.

Tuesday the 1st of September is a nice clean-up. 4ft from the SE, 9-second period, light cross-off wind, and good surf conditions. The energy is moderate at 432. It's a fun, clean day after the chaos. After that, we're back to small, ordinary stuff through the 2nd and 3rd.

So, the long and short of it: Thursday the 27th is your best bet for a proper, clean, fun surf. The Tuesday the 25th afternoon is a solid runner-up. Everything else is either too small, too windy, or too big and messy. Get out there on the 27th, and you'll be smiling.

Rusty.

Short Range Forecast

Some drizzle, heaviest during Fri afternoon. Warm (max 22°C on Fri morning, min 13°C on Wed night). Wind will be generally light.

Days 4-6 Weather Summary

Light rain (total 7mm), mostly falling on Mon night. Warm (max 23°C on Mon afternoon, min 12°C on Sun night). Wind will be generally light.

Wednesday
19
Thursday
20
Friday
21
Saturday
22
Sunday
23
Monday
24
Tuesday
25
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
1
0
1
1
1
0
0
0
0
0
0
1
1
1
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)
0.6
ESE
10
0.6
ESE
10
1.4
NE
6
1
NE
6
0.6
NE
6
0.9
ENE
6
0.7
NE
7
1
NE
6
0.4
ENE
6
0.5
S
5
0.6
SSE
5
0.3
NE
6
0.5
S
8
0.5
S
8
0.8
ENE
5
0.7
ENE
5
0.7
NE
5
0.8
ENE
6
1
ENE
7
1.1
NE
7
1
S
7
Wave Graph
Metric surfscale
Energy kJ
82
74
118
62
25
57
46
76
15
11
15
7
32
30
34
25
30
41
93
126
89
Wind (km/h)
10
NNE
20
NE
10
NNW
10
NNW
10
NE
10
WNW
10
WNW
15
WNW
5
NW
5
SSW
10
ESE
0
ENE
5
NNE
20
NE
10
NNW
10
NNW
10
N
0
NE
15
NNW
15
WNW
15
W
Wind State
cross
cross
cross-off
cross-off
cross
off
off
off
off
glassy
on
glassy
cross
cross
cross-off
cross-off
cross-off
glassy
cross-off
off
off
High Tide
12:56PM1.29m
1:14AM0.93m
1:51PM1.26m
2:26AM0.86m
2:55PM1.25m
3:47AM0.84m
4:00PM1.27m
4:57AM0.87m
4:57PM1.32m
5:49AM0.92m
5:45PM1.38m
6:31AM0.99m
6:26PM1.45m
Low Tide
7:35PM0.47m
6:58AM0.47m
8:49PM0.50m
7:53AM0.53m
10:06PM0.48m
9:01AM0.55m
11:09PM0.43m
10:09AM0.54m
11:58PM0.37m
11:07AM0.49m
00:37AM0.30m
11:56AM0.43m
1:12AM0.23m
part cloud
clear
part cloud
part cloud
cloud
part cloud
cloud
light rain
part cloud
part cloud
part cloud
rain showers
part cloud
clear
part cloud
clear
part cloud
mod rain
light rain
rain showers
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:31
6:31
6:30
6:28
6:26
6:26
6:24
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:28
5:28
5:29
5:30
5:30
5:30
5:31
 mm
1
1
6
1
1
Temp °C
18
17
14
21
20
15
22
18
14
17
16
15
18
17
14
22
23
19
20
19
13
Feels °C
16
13
13
18
18
13
20
15
13
15
14
15
15
13
13
18
20
17
17
17
10
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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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