Thirroul Surf Break

Lat Long: 34.32° S 150.93° E

Thirroul Surf Forecast and Surf Report

Issued: 3 am 12 Jul 2026 (local time)

Forecast update in  hr  min

Today's Thirroul sea temperature is
18.3° 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 12 Jul 2026:

  • Best quality surf: Sunday 19 Jul, 4AM (local time) - 6ft (1.8m), 10s period, E swell with cross-offshore winds.
  • Most powerful swell: Sunday 19 Jul, 10AM (local time) - 7ft (2.1m), 11s period, E swell with 1,029 kJ wave energy.
  • Next surfable swell (1★+): Sunday 12 Jul, 1PM (local time) - 1.5ft (0.5m), 10s period with ESE 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 12) at 1PM. The primary swell is predicted to be 0.5m and 10s period with a secondary swell of 0.4m and 8s. The wind is predicted to be offshore as the swell arrives.

The most powerful waves expected at Thirroul in the next 16 days are 2.1m 11s and forecast to arrive on Sunday (Jul 19) at 10AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 3s period and expected on Sunday (Jul 12) at 4PM.

Wave TypeTime (AEST) & Date Wave Height & Period
Next good surf (1 star+) 1PM (Sun 12th Jul)1.5ft (0.5m) 10s
Best Surf 4AM (Sun 19th Jul)6ft (1.8m) 10s
Most Powerful10AM (Sun 19th Jul)7ft (2.1m) 11s

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


Alright folks, Rusty here. Let's have a look at what's on the cards for the next couple of weeks.

First thing, the water temp is sitting at 65°, which is a touch above average for this time of year – nothing wild, but you'll notice it's a bit more comfortable than usual.

Honestly, it's a slow start. We're looking at a solid gap of a few days with nothing worth paddling out for. The waves are tiny, the energy is weak, and while the wind is offshore, it's just not enough to get excited about. You're better off waiting it out.

The first real chance of something decent rolls in on Wednesday the 15th. Thirroul is gonna jump from flat to a solid 8ft of southerly swell, but it comes with a short period of 8 seconds. The wind is cross-shore, creating a bit of chop, and with that much juice and a short period, it's going to be a bit of a mess. The combined energy is a beefy 1561, but the conditions are marginal. This one's for the experts only, and even then, it's a gamble.

Thursday the 16th and Friday the 17th are still messy with onshore winds and dropping swell. It's not great.

Saturday the 18th stays marginal, but the energy is dropping. Sunday the 19th sees a new pulse of 7ft easterly swell at 11 seconds, but it's onshore. The energy is strong at 1284, but it's not clean.

Now, here's the standout. The best window is Monday the 20th through to Wednesday the 23rd. Monday morning the 20th is the pick of the bunch. Thirroul gets a clean 7ft easterly swell at 11 seconds, with a light cross-offshore breeze from the NNW. The combined energy is strong at 1123, and it’s described as excellent surf for experienced surfers. This is a proper groundswell with a good period, and the wind is clean. It's going to be a big day.

Tuesday the 21st is also a treat. The morning is a clean 6ft east swell, but the afternoon is where it gets interesting. Glassy conditions with the wind dropping to nothing, and that same east swell at 11 seconds. Perfect. The energy is still strong at 815.

Wednesday the 22nd morning holds another excellent session with 5ft of east swell, but the period stretches to 13 seconds. That's a long-period groundswell, which means it'll have real power but might be a bit straight at the beach. Thirroul is a beach and reef setup, so it should handle it well. The energy is high at 1355.

After that, Thursday the 23rd keeps the swell going with a solid 8ft southerly swell, clean and cross-offshore. This is another big one. The energy is huge at 2124, but it's a short period of 9 seconds, so it'll be punchy. Crowds are listed as "sometimes" for Thirroul, so expect a few locals out, especially on these good days.

The following days into the start of the next week, the 24th to the 26th, still have fun waves in the 5ft to 6ft range with offshore winds, so the run of good surf looks like it's going to stick around. The 27th, the swell starts to fade back down.

So, to sum it up: the first few days are a write-off. The best, most reliable surf is from Monday the 20th through to Wednesday the 23rd. Get out there for that glassy Tuesday afternoon if you can.

Rusty.

Short Range Forecast

Mostly dry. Very mild (max 18°C on Mon morning, min 9°C on Sun night). Wind will be generally light.

Days 4-6 Weather Summary

Mostly dry. Very mild (max 15°C on Wed morning, min 11°C on Wed night). Wind will be generally light.

Sunday
12
Monday
13
Tuesday
14
Wednesday
15
Thursday
16
Friday
17
Saturday
18
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
1
0
0
0
0
0
0
0
3
0
2
0
0
1
0
0
1
1
1
2
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
0.5
ESE
10
0.3
ESE
9
0.2
S
12
0.2
S
11
0.2
S
7
0.1
S
16
0.2
S
12
0.4
S
10
2.5
S
8
2
S
10
2
S
8
1.7
SSE
7
1.5
S
7
1.1
E
8
1.4
E
9
1.3
E
8
1.3
E
8
1.2
E
8
1.4
E
8
1.6
E
9
Wave Graph
Metric surfscale
Energy kJ
77
54
16
11
10
4
5
11
32
958
739
459
261
205
153
304
234
223
190
279
434
Wind (km/h)
25
W
25
W
15
NW
20
W
20
W
10
NW
15
WNW
20
WSW
15
SW
15
S
20
S
15
SW
20
S
20
S
15
SSW
20
S
20
S
15
SSW
15
S
10
SSE
10
WSW
Wind State
off
off
off
off
off
off
off
cross-off
cross-off
cross
cross-on
cross-off
cross
cross
cross-off
cross
cross-on
cross
cross
cross-on
cross-off
High Tide
6:18PM1.70m
7:10AM1.09m
7:12PM1.77m
8:06AM1.12m
8:05PM1.81m
8:57AM1.15m
8:55PM1.80m
9:47AM1.18m
9:44PM1.74m
10:35AM1.20m
10:31PM1.62m
11:23AM1.22m
11:18PM1.47m
Low Tide
11:39AM0.29m
1:13AM0.04m
12:36PM0.27m
2:07AM-0.03m
1:31PM0.24m
2:57AM-0.07m
2:25PM0.23m
3:45AM-0.07m
3:17PM0.24m
4:30AM-0.03m
4:10PM0.28m
5:13AM0.04m
5:05PM0.33m
clear
clear
clear
clear
clear
clear
part cloud
cloud
part cloud
clear
clear
clear
clear
part cloud
part cloud
part cloud
part cloud
part cloud
clear
clear
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:01
7:01
7:00
7:00
7:00
6:58
6:58
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:01
5:01
5:02
5:04
5:04
5:05
5:05
 mm
Temp °C
14
14
12
18
17
12
18
17
13
15
14
12
15
15
12
15
15
13
16
16
13
Feels °C
7
8
6
12
12
9
13
12
9
10
9
8
10
11
9
11
12
10
13
14
12
  • 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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