Thirroul Surf Break

Lat Long: 34.32° S 150.93° E

Thirroul Surf Forecast and Surf Report

Issued: 3 pm 21 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, 10AM (local time) - 7.5ft (2.3m), 9s period, S swell with cross-offshore winds.
  • Most powerful swell: Friday 24 Jul, 10PM (local time) - 6.5ft (2.0m), 12s period, S swell with 1,175 kJ wave energy.
  • Next surfable swell (1★+): Wednesday 22 Jul, 1AM (local time) - 3.5ft (1.1m), 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 1AM. The primary swell is predicted to be 1.1m 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 2.0m 12s and forecast to arrive on Friday (Jul 24) at 10PM. 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 Thursday (Jul 23) at 10PM.

Wave TypeTime (AEST) & Date Wave Height & Period
Next good surf (1 star+) 1AM (Wed 22nd Jul)3.5ft (1.1m) 10s
Best Surf10AM (Fri 24th Jul)7.5ft (2.3m) 9s
Most Powerful10PM (Fri 24th Jul)6.5ft (2.0m) 12s

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


The Lowdown

Alright, Rusty here again. Let's talk about the coming couple of weeks for the Thirroul stretch in units the old-timers might like.

It starts off slow, but there's a big thump of swell coming later. The water's sitting at about 65°, which is right where it should be for July—no anomalies to report.

The 21st of July is a rough Tuesday. There's a 4ft ENE swell at 10 seconds, but a cross-breeze is making a mess. Combined swell energy is weak (359)—not worth suiting up. But Wednesday the 22nd turns it around. The swell is smaller at 3ft ENE, but we get a light offshore wind in the morning and cross-off in the afternoon, so it cleans right up. Moderate energy (204-202) makes for a fun session on the beach and reef. Thursday the 23rd sees the swell drop with stronger W winds, leaving only 3ft of junk—too weak to care about.

Now, here's the first standout. Friday the 24th, a south swell arrives. The morning brings a solid 8ft S swell at 9 seconds, with a clean cross-off breeze. The energy jumps to strong (1325). It's over 5ft, so beginners should stay out. Then Friday afternoon goes glassy with a 6ft S swell at a longer 11-second period. Energy is still strong (895). That is clean, lined-up surf, and it'll be a proper treat. The S swell direction suits Thirroul, and glassy conditions are a bonus.

Saturday the 25th and Sunday the 26th are more marginal. The S swell eases with moderate winds and energy dropping (447 to 284). It gets a bit choppy. The 27th and 28th of July are flat—tiny energy down to 17 on the Tuesday.

We get a tiny glassy wave on the 29th (1ft, 46 energy) but nothing special. Then, hold tight for Thursday the 30th of July. The morning brings a massive 12ft S swell at 11 seconds. The combined energy is very strong at 4769, and the offshore wind keeps it clean. This is expert-only, over 8ft, and carrying a lot of power. The afternoon hits 13ft S swell at 12 seconds (6165 energy), though a cross-shore breeze picks up. That's a major south groundswell event. Friday the 31st has another clean 10ft SSE swell with offshore winds (2388 energy)—again, only for experienced surfers.

The first week of August still has size but gets messy. The 1st of August has 8ft to 7ft SSE swell, but cross-onshore winds make it choppy. The 2nd drops to 6ft with a light cross-shore. The 3rd and 4th of August see the swell ease to around 3ft SSE with clean morning windows and moderate energy (200-300 range). It's ordinary but rideable. The 5th of August fades to small 3ft SE swell with strong winds.

So, the best options: Friday the 24th of July afternoon is a standout with glassy 6ft south swell. The absolute highlight is Thursday the 30th of July morning—a massive 12ft S groundswell under offshore wind, but only for the experts. That'll be a day with plenty of grunt and clean walls.

Rusty.

Short Range Forecast

Mostly dry. Warm (max 20°C on Wed morning, min 7°C on Thu night). Winds increasing (light winds from the WSW on Wed afternoon, fresh winds from the WSW by Thu night).

Days 5-7 Weather Summary

Mostly dry. Very mild (max 19°C on Sat morning, min 7°C on Fri night). Wind will be generally light.

Tue
21
Wednesday
22
Thursday
23
Friday
24
Saturday
25
Sunday
26
Monday
27
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
0
0
0
4
3
3
1
1
2
1
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)
1.2
ENE
10
1.1
ENE
10
1
ENE
10
1
ENE
10
0.8
ENE
10
0.8
ENE
9
0.7
ENE
9
0.7
S
6
2.3
S
9
1.9
S
11
1.8
SSE
11
1.4
S
10
1.1
S
10
1.2
S
11
1.4
S
10
1.3
S
9
1.1
S
8
0.8
SSE
8
0.6
SSE
8
0.6
SSE
8
Wave Graph
Metric surfscale
Energy kJ
286
235
179
175
103
94
73
38
865
878
866
432
259
345
400
281
173
85
49
51
Wind (km/h)
15
NE
10
NW
5
W
5
WSW
15
W
20
W
25
WSW
25
WSW
15
WSW
5
SE
15
W
20
W
20
WSW
15
WSW
15
SSW
15
SSE
10
WSW
5
NNW
15
NE
5
WSW
Wind State
cross
cross-off
off
cross-off
off
cross-off
cross-off
cross-off
cross-off
glassy
off
cross-off
cross-off
cross-off
cross
cross-on
cross-off
cross-off
cross
cross-off
High Tide
1:54AM1.01m
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
Low Tide
8:15PM0.49m
7:57AM0.39m
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
part cloud
part cloud
cloud
cloud
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
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
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:07
5:07
5:08
5:08
5:09
5:10
5:10
 mm
Temp °C
17
13
20
20
14
18
17
10
15
15
9
19
17
12
16
15
12
18
18
13
Feels °C
14
12
17
18
11
12
11
2
10
12
3
15
12
7
12
12
10
15
14
11
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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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