Thirroul Surf Break

Lat Long: 34.32° S 150.93° E

Thirroul Surf Forecast and Surf Report

Issued: 3 am 22 Jul 2026 (local time)

Forecast update in  hr  min

Today's Thirroul sea temperature is
18.2° C
0.7° 

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


Thirroul surf forecast from 21 Jul 2026:

  • Best quality surf: Friday 24 Jul, 7AM (local time) - 6ft (1.9m), 9s period, S swell with cross-offshore winds.
  • Most powerful swell: Friday 24 Jul, 7PM (local time) - 6ft (1.8m), 13s period, SSE swell with 1,075 kJ wave energy.
  • Next surfable swell (1★+): Wednesday 22 Jul, 10AM (local time) - 3.5ft (1.0m), 10s period with ENE 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 (Jul 22) at 10AM. The primary swell is predicted to be 1.0m and 10s period with a secondary swell of 0.3m and 10s. 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 13s and forecast to arrive on Friday (Jul 24) 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 (Jul 29) at 4AM.

Wave TypeTime (AEST) & Date Wave Height & Period
Next good surf (1 star+)10AM (Wed 22nd Jul)3.5ft (1.0m) 10s
Best Surf 7AM (Fri 24th Jul)6ft (1.9m) 9s
Most Powerful 7PM (Fri 24th Jul)6ft (1.8m) 13s

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 offer at Thirroul over the next couple of weeks.

Right off the bat, we’ve got a bit of a slow start, but there’s some decent surf creeping in. Wednesday the 22nd kicks things off with a small but clean 3ft swell from the east-northeast, with a 10-second period pushing a moderate 204 units of energy. The wind is light and cross-off, so the surface will be tidy. It’s not huge, but it’s a fun, workable size for a midweek paddle.

The real story begins to build on Friday the 24th. We see a new south swell pushing in, hitting 5ft in the morning with a 9-second period and a solid 379 units of energy. The wind is light cross-off from the southwest, keeping things clean. By the afternoon, the swell jumps to 6ft but the period stretches to 12 seconds – that’s proper groundswell. The energy ramps up to 803 and the wind goes onshore from the east-southeast, so the surface gets a bit bumpy. It’s a trade-off: more power, but less polish.

Saturday the 25th is a standout. The morning brings a clean 5ft south swell, 10-second period, and 434 units of energy with an offshore wind from the west. Then Saturday afternoon turns glassy – that’s zero wind, 4ft of south swell, and a calm, glassy surface. Conditions are spot on for a fun, relaxed session with the crew. The water temperature is 65°, which is about average for this time of year, so no surprises there.

Sunday the 26th morning is also excellent: 5ft of south swell, 10-second period, 479 units of energy, and a clean offshore wind from the west-northwest. The afternoon stiffens up with a cross-onshore breeze, so get out early.

Now, we hit a bit of a lull from Monday the 27th through to Tuesday the 29th. Swell drops to under 3ft, the energy fades, and the wind gets messy. There’s a small window on Monday morning with a 3ft swell from the south-southeast, but it’s ordinary. Not worth paddling out for.

Then things get interesting again. On Wednesday the 29th we see a 6ft south swell with a short 7-second period, but the wind is cross-onshore and the energy is only 324. It’s choppy and not great. But Thursday the 30th brings a big 10ft swell from the south-southeast, with 8-second period and a massive 1232 units of energy. The wind is light cross-onshore, so it’s bumpy, but for experienced surfers, there’s some serious power to play with. The afternoon stays similar with 8ft and 949 units. This is not for beginners – it’s a big, raw ocean.

Friday the 31st holds 5ft from the south-southeast with an 11-second period, but the onshore wind and rain put a damper on the quality. The energy is still high at 859, but the surface is messy.

The real standout of the whole forecast falls on Thursday the 6th of August. The morning pumps out a massive 16ft swell from the south with a 12-second period, generating an incredible 12106 units of energy. The wind is cross-off from the west-southwest, keeping it clean. That’s a serious, powerful groundswell. The afternoon eases to 13ft but still carries 4546 units of energy. This is excellent surf for experienced surfers only – 16ft is well over the 8ft mark, so it’s expert territory. The setup is a beach and reef, so it will be powerful and can handle that energy. Crowds are possible at Thirroul, especially on a day like this, but with these conditions, you’ll have your pick of waves if you’re skilled enough.

So to sum it up: the best on offer is Saturday the 25th for clean, fun conditions, and the absolute standout is the big swell on Thursday the 6th of August for experienced crew looking for a challenge. Everything else is either small, ordinary, or too windy.

Rusty, signing off.

Short Range Forecast

Mostly dry. Warm (max 20°C on Wed morning, min 6°C on Thu night). Winds increasing (light winds from the SW on Wed afternoon, fresh winds from the WSW by Thu afternoon).

Days 4-6 Weather Summary

Mostly dry. Very mild (max 19°C on Sat morning, min 10°C on Sat night). Wind will be generally light.

Wednesday
22
Thursday
23
Friday
24
Saturday
25
Sunday
26
Monday
27
Tuesday
28
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
2
2
1
0
0
1
2
2
2
2
2
2
2
1
2
1
0
1
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)
1
ENE
10
1
ENE
10
0.8
ENE
10
0.8
ENE
9
0.7
ENE
9
1.1
S
9
1.5
S
9
1.7
S
12
1.8
S
11
1.4
S
10
1.1
S
10
1.3
S
11
1.5
S
10
1.3
S
10
1.1
S
9
0.9
SSE
9
0.8
SSE
8
0.5
S
8
0.3
S
7
0.3
SE
7
0.1
SE
14
Wave Graph
Metric surfscale
Energy kJ
179
175
103
94
73
181
348
786
819
424
265
418
476
313
203
123
96
34
9
9
8
Wind (km/h)
5
W
5
WSW
15
WNW
20
W
25
W
20
WSW
10
SW
5
ESE
15
W
10
W
0
E
10
W
5
WNW
10
ENE
10
W
5
NNW
15
NE
10
NW
5
NNW
10
NE
10
SSW
Wind State
cross-off
cross-off
off
cross-off
cross-off
cross-off
cross-off
on
cross-off
off
glassy
cross-off
off
cross-on
off
cross-off
cross-on
off
cross-off
cross
cross
High Tide
2:46PM1.28m
3:00AM0.92m
3:41PM1.30m
4:12AM0.87m
4:35PM1.33m
5:17AM0.88m
5:25PM1.37m
6:11AM0.91m
6:11PM1.42m
6:56AM0.95m
6:53PM1.48m
7:36AM0.99m
7:32PM1.52m
Low Tide
9:28PM0.50m
8:45AM0.45m
10:38PM0.47m
9:39AM0.49m
11:37PM0.42m
10:35AM0.49m
00:25AM0.36m
11:28AM0.47m
1:07AM0.30m
12:15PM0.43m
1:45AM0.24m
12:58PM0.40m
2:20AM0.20m
cloud
cloud
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
clear
clear
part cloud
clear
clear
clear
part cloud
cloud
part cloud
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:56
6:56
6:56
6:54
6:54
6:54
6:52
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:07
5:08
5:08
5:09
5:10
5:10
5:12
 mm
Temp °C
20
19
14
18
16
10
14
14
8
19
17
11
18
18
14
18
17
13
18
18
14
Feels °C
17
17
11
12
9
3
10
11
3
16
16
7
16
15
13
15
13
12
16
15
12
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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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