Thirroul Surf Break

Lat Long: 34.32° S 150.93° E

Thirroul Surf Forecast and Surf Report

Issued: 9 pm 02 Aug 2026 (local time)

Forecast update in  hr  min

Today's Thirroul sea temperature is
17.9° C
0.4° 

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


Thirroul surf forecast from 2 Aug 2026:

  • Best quality surf: Monday 3 Aug, 7AM (local time) - 3.5ft (1.0m), 11s period, SE swell with cross-offshore winds.
  • Most powerful swell: Thursday 6 Aug, 1PM (local time) - 4.5ft (1.4m), 9s period, S swell with 334 kJ wave energy.
  • Next surfable swell (1★+): Monday 3 Aug, 7AM (local time) - 3.5ft (1.0m), 11s period with SE 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 Monday (Aug 03) at 7AM. The primary swell is predicted to be 1.0m and 11s period with a secondary swell of 0.1m and 8s. 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 1.4m 9s and forecast to arrive on Thursday (Aug 06) at 1PM. Winds are predicted to be cross-onshore 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 04) at 10PM.

Wave TypeTime (AEST) & Date Wave Height & Period
Next good surf (1 star+) 7AM (Mon 3rd Aug)3.5ft (1.0m) 11s
Best Surf 7AM (Mon 3rd Aug)3.5ft (1.0m) 11s
Most Powerful 1PM (Thu 6th Aug)4.5ft (1.4m) 9s

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


The Lowdown

Righto, let’s have a look at what’s on the cards for the next couple of weeks.

First up, we’ve got a bit of a slow start, but don’t write it off just yet. The early part of the week is pretty ordinary, with only small, weak swells and cross-off winds keeping things clean but not exactly firing. The real action starts to build from Thursday, the 6th of August. That’s when we see a solid south swell pushing in, with moderate energy (234) and clean conditions in the morning under a light west breeze. It’s not massive, but it’s a genuine window of fun, groomed surf.

The standout, without a doubt, is Friday morning, the 7th of August at Thirroul. We’re looking at a clean 4ft south swell, with a period around 9 seconds and a glassy, dead-calm morning. The energy is still moderate (205), but with zero wind, the waves will be silky smooth. This is the pick of the period—get out there early before the cross-onshore breeze spoils it by the afternoon.

Things go quiet again over the weekend and into the start of the next week, with only small, weak waves on offer. Honestly, there’s a dry spell from Saturday afternoon right through to the middle of the following week. Then, on Monday the 17th of August, we get a big spike of energy—a very powerful south swell with strong energy (1070) and a 12-second period. The swell height is pushing 6ft to 7ft. That’s a lot of water moving, and with the wind being light and cross-shore, the waves will have real grunt. However, the report flags it as marginal, so it might be a bit raw and lumpy. This one’s for experienced surfers only—beginners should sit this one out. The energy is strong (1070 to 1099), so there’s plenty of push, but the quality might be a bit rugged.

All up, the clear winner is Friday morning the 7th of August. That’s your chance for some clean, glassy lines. The big swell on the 17th is worth watching, but it’s a long way off and the conditions are uncertain.

Rusty.

Short Range Forecast

Mostly dry. Warm (max 22°C on Mon morning, min 9°C on Mon night). Wind will be generally light.

Days 5-7 Weather Summary

Mostly dry. Very mild (max 17°C on Thu afternoon, min 7°C on Wed night). Wind will be generally light.

Monday
3
Tuesday
4
Wednesday
5
Thursday
6
Friday
7
Saturday
8
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
2
1
1
1
0
0
0
0
0
1
2
1
2
2
0
1
1
0
1
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.1
SE
11
0.9
SE
10
0.7
SE
10
0.6
SE
10
0.2
SSE
10
0.2
SSE
10
0.2
E
13
0.5
S
8
0.6
S
8
0.7
S
8
1.2
S
9
1.4
S
9
1.2
S
9
1.1
S
9
1
S
9
0.7
S
8
0.5
S
8
0.4
SSE
9
0.8
S
8
Wave Graph
Metric surfscale
Energy kJ
314
180
102
69
10
10
13
30
42
58
225
334
235
194
162
66
30
29
76
Wind (km/h)
10
NW
15
NNW
10
NNW
10
W
15
WNW
20
W
25
WSW
25
WSW
20
WSW
15
W
5
W
10
NE
10
W
0
NNE
15
ENE
5
W
5
NNE
20
NE
10
NNW
Wind State
off
cross-off
cross-off
cross-off
off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross
cross-off
glassy
cross-on
off
glassy
cross-on
cross-off
High Tide
10:31PM1.41m
11:18AM1.25m
11:13PM1.31m
12:03PM1.29m
00:01AM1.20m
12:53PM1.32m
1:01AM1.09m
1:52PM1.36m
2:15AM1.00m
2:58PM1.41m
3:39AM0.97m
4:05PM1.49m
Low Tide
5:02AM0.16m
5:11PM0.39m
5:38AM0.20m
6:07PM0.41m
6:19AM0.25m
7:13PM0.42m
7:08AM0.31m
8:30PM0.40m
8:07AM0.36m
9:51PM0.34m
9:16AM0.39m
11:05PM0.25m
part cloud
cloud
clear
clear
clear
clear
clear
part cloud
clear
clear
clear
part cloud
clear
clear
clear
clear
clear
clear
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:48
6:47
6:46
6:46
6:45
6:43
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:15
5:16
5:17
5:17
5:19
5:20
 mm
Temp °C
12
22
21
12
17
17
12
17
15
10
16
17
11
16
15
12
17
17
12
Feels °C
10
18
18
8
11
11
5
12
9
6
13
13
8
13
12
11
14
13
10
  • Map Icons:
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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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