Thirroul Surf Break

Lat Long: 34.32° S 150.93° E

Thirroul Surf Forecast and Surf Report

Issued: 3 pm 25 Jul 2026 (local time)

Forecast update in  hr  min

Today's Thirroul sea temperature is
18.7° C
1.3° 

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


Thirroul surf forecast from 25 Jul 2026:

  • Best quality surf: Friday 31 Jul, 1AM (local time) - 11ft (3.5m), 11s period, S swell with cross-offshore winds.
  • Most powerful swell: Friday 31 Jul, 1AM (local time) - 11ft (3.5m), 11s period, S swell with 3,093 kJ wave energy.
  • Next surfable swell (1★+): Sunday 26 Jul, 1AM (local time) - 4.5ft (1.4m), 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 Sunday (Jul 26) at 1AM. The primary swell is predicted to be 1.4m and 11s period with a secondary swell of 0.2m 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 3.5m 11s and forecast to arrive on Friday (Jul 31) at 1AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.0m 4s period and expected on Wednesday (Jul 29) at 7PM.

Wave TypeTime (AEST) & Date Wave Height & Period
Next good surf (1 star+) 1AM (Sun 26th Jul)4.5ft (1.4m) 11s
Best Surf 1AM (Fri 31st Jul)11ft (3.5m) 11s
Most Powerful 1AM (Fri 31st Jul)11ft (3.5m) 11s

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


The Lowdown

Alright folks, Rusty here with a look at what’s on the cards for our local stretch.

We’ve got a bit of a slow start, with no real action for the first few days. Things will kick off properly on Saturday, July 25th. The water’s sitting at a touch warmer than normal for this time of year, about 66°F, which is a nice little bonus.

Let’s get into it. The pick of the early window looks to be Thirroul. It’s a beach and reef set-up, exposed to the swell. The first good session rolls in on Saturday afternoon with a clean 4ft swell coming from the south. It’s got a solid 11-second period and the wind is a light cross-offshore from the WSW. The energy is moderate (284), but it’ll be clean and fun for an intermediate surfer. Keep an eye on the crowds though, it can get a bit busy here.

Sunday morning, July 26th, is shaping up even better. We’re looking at a very clean 5ft south swell with that same 11-second period, and the wind stays light and cross-off. The energy jumps into the moderate range (576), and the waves should have a lot more push.

Now, things get a bit tricky in the middle of the week. Wednesday the 29th is a write-off, with almost no swell at all, just tiny 0.3ft leftovers.

But then, hold onto your boards. Thursday, July 30th brings a serious pulse of energy. The morning session has a powerful 12ft swell from the south. The combined energy is very strong (3773). However, this is big, heavy stuff – over 8ft, so this is strictly for experts only. The wind is a cross-offshore from the SSW, keeping the faces reasonably clean. The afternoon turns ugly with a cross-onshore wind, closing out the wave.

The big, lumpy conditions hang around through the weekend, with swells staying between 8ft and 8ft through to Saturday, August 1st. It’s messy and cross-shore, not what you’d call a fun paddle. This stretch is more interesting for kite surfing than a standard surf.

Looking further ahead, Sunday, August 2nd is a genuine standout. The morning delivers a clean 6ft swell from the southeast, with a very long 12-second period. That’s groundswell, full of energy. The wind is glassy, a slight cross-off from the NW. The energy is still strong (1028), and the long period will make for some lined-up, powerful waves. The long period can be tricky on a beach break, but Thirroul’s reef structure should handle it well. This is the best session on offer for experienced surfers.

After that, the trend tapers off through the first week of August, with smaller 3ft to 4ft swells and more onshore winds. The morning of Friday, August 7th is worth a mention for beginners. It’s got a 7ft swell from the ESE, but the wind is completely dead – flat calm and glassy (716 moderate energy). It’s a bit big for complete beginners, but confident learners will enjoy the clean, smooth conditions.

The second week gets a bit wind-affected and messy, with decreasing energy and onshore winds from the east. Not much to write home about, to be honest.

So, to boil it down: Sunday, August 2nd is the one to circle on the calendar for the experienced crew. For the first week, try Saturday the 25th or Sunday the 26th of July for a classic, clean winter session.

Stay keen, and I’ll catch you in the water.

Rusty.

Short Range Forecast

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

Days 5-7 Weather Summary

Some drizzle, heaviest during Wed morning. Warm (max 20°C on Tue afternoon, min 7°C on Wed night). Winds increasing (light winds from the NW on Tue afternoon, fresh winds from the WSW by Wed afternoon).

Sat
25
Sunday
26
Monday
27
Tuesday
28
Wednesday
29
Thursday
30
Friday
31
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
3
0
2
1
0
1
0
0
0
0
0
1
4
0
6
2
2
4
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
S
11
1.4
S
11
1.6
S
11
1.3
S
10
1.1
S
9
1
S
9
0.9
SSE
8
0.6
S
8
0.4
S
9
0.3
S
9
0.2
S
8
0.1
SE
13
0.1
S
17
1.6
S
9
3.5
S
10
3.5
S
11
3.5
S
11
2.5
S
10
2.5
SSE
9
2.2
SSE
9
Wave Graph
Metric surfscale
Energy kJ
275
475
573
346
207
154
118
42
24
13
8
7
7
373
2374
2962
3093
1403
1060
740
Wind (km/h)
5
WSW
10
WSW
10
WSW
10
SE
5
W
5
N
20
NE
10
NW
10
WNW
5
NW
10
NW
25
W
30
WSW
20
WSW
20
SSW
25
S
15
SW
15
SSW
20
S
15
SW
Wind State
cross-off
cross-off
cross-off
cross-on
cross-off
glassy
cross
off
off
cross-off
cross-off
off
cross-off
cross-off
cross-off
cross-on
cross-off
cross
cross
cross-off
High Tide
5:25PM1.37m
6:11AM0.91m
6:11PM1.42m
6:56AM0.95m
6:53PM1.48m
7:36AM0.99m
7:32PM1.52m
8:13AM1.04m
8:08PM1.55m
8:49AM1.08m
8:44PM1.56m
9:25AM1.12m
9:19PM1.53m
Low Tide
00:25AM0.36m
11:28AM0.47m
1:07AM0.30m
12:15PM0.43m
1:45AM0.24m
12:58PM0.40m
2:20AM0.20m
1:39PM0.36m
2:54AM0.16m
2:18PM0.34m
3:26AM0.14m
2:57PM0.34m
3:57AM0.13m
clear
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
clear
rain showers
clear
clear
clear
part cloud
part cloud
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:54
6:54
6:52
6:52
6:50
6:50
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:09
5:10
5:10
5:12
5:13
5:13
5:14
 mm
1
Temp °C
19
12
16
15
12
17
17
14
19
20
12
13
12
9
14
14
11
14
14
11
Feels °C
17
8
13
12
11
14
13
13
15
17
8
5
4
2
8
8
5
9
9
7
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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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