Thirroul Surf Break

Lat Long: 34.32° S 150.93° E

Thirroul Surf Forecast and Surf Report

Issued: 9 am 15 Jul 2026 (local time)

Forecast update in  hr  min

Today's Thirroul sea temperature is
18.0° C
0.5° 

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


Thirroul surf forecast from 15 Jul 2026:

  • Best quality surf: Thursday 16 Jul, 4AM (local time) - 7ft (2.1m), 8s period, S swell with cross-offshore winds.
  • Most powerful swell: Sunday 19 Jul, 4PM (local time) - 5.5ft (1.7m), 11s period, ENE swell with 619 kJ wave energy.
  • Next surfable swell (1★+): Thursday 16 Jul, 1AM (local time) - 5ft (1.5m), 8s 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 Thursday (Jul 16) at 1AM. The primary swell is predicted to be 1.5m and 8s period with a secondary swell of 0.1m and 15s. 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 1.7m 11s and forecast to arrive on Sunday (Jul 19) at 4PM. Winds are predicted to be 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 (Jul 21) at 1PM.

Wave TypeTime (AEST) & Date Wave Height & Period
Next good surf (1 star+) 1AM (Thu 16th Jul)5ft (1.5m) 8s
Best Surf 4AM (Thu 16th Jul)7ft (2.1m) 8s
Most Powerful 4PM (Sun 19th Jul)5.5ft (1.7m) 11s

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


The Lowdown

G'day, Rusty here. Look, I've been staring at the charts for our patch, and it's a bit of a mixed bag. We've got a decent run of swell coming, but the winds are going to make you work for it. The first few days are a write-off, but there's a couple of windows that'll get the blood pumping.

We're starting with a bit of a wait. The first real chance to get wet doesn't come until Wednesday the 19th, but it's a tease. Thirroul is a beach and reef setup, and it's exposed to the south swell. The water temp is sitting at 64°, which is about average for this time of year.

That first window on Sunday morning, the 19th, is a bit of a let-down. There's a 6ft swell from the ENE, but the wind is cross-on at 6 mph from the SE, making it a bit messier than it should be. The energy is moderate (640), but the vibe is marginal.

The real standout is the Monday morning, the 20th of July. The wind swings around to a light NNW at 6 mph, giving us a clean cross-offshore breeze. The swell is a solid 5ft from the ENE, with a period of 10 seconds, which is a nice groundswell. The energy is moderate (558), and the notes say "expect very good surf conditions". This is your best bet for the week. The conditions will be clean and the waves will have some shape. It's a beach and reef, so it'll work well.

The next morning, Tuesday the 21st, is also looking good. We've got a similar clean cross-offshore wind from the NNW at 6 mph, with a 4ft ENE swell. The energy is a bit lower (354), but the conditions are clean. The note says "expect good surf conditions", so it's a solid option if you missed Monday.

After that, the surf drops off for a bit, with small, poor waves through the rest of the week. But then, keep your eye on Sunday, the 26th of July. The swell jumps back up to 8ft from the S, with a period of 10 seconds. The energy is strong (1999), but the wind is a light cross-on from the S at 6 mph. It's a bit of a "marginal" call, so it's one for the experts.

Then, the real gem of the whole outlook might be Monday morning, the 27th of July. The wind goes dead calm, glassy as, with a 5ft S swell pumping in at 12 seconds – that's a very long period groundswell. The energy is a solid 796. The notes say "expect very good surf conditions". This is a potential epic session, but being a long period S swell at a beach break, it might be a bit straight and fat. Best on the low tide bank.

So, to wrap it up:
- Best on offer: Monday morning, 20th July – clean, solid 5ft ENE swell, perfect conditions.
- Second best: Tuesday morning, 21st July – similar clean conditions, just a bit smaller.
- Long-range promise: Monday morning, 27th July – glassy, long period S swell, could be a ripper.

The rest of the days are either blown out, too small, or just average. Get on it while you can.

Rusty.

Short Range Forecast

Light rain (total 6mm), mostly falling on Thu night. Very mild (max 16°C on Thu morning, min 10°C on Wed night). Wind will be generally light.

Days 4-6 Weather Summary

Mostly dry. Very mild (max 17°C on Sun morning, min 11°C on Sun night). Wind will be generally light.

Wednesday
15
Thursday
16
Friday
17
Saturday
18
Sunday
19
Monday
20
Tuesday
21
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
0
2
0
0
0
0
0
0
0
0
1
2
2
3
3
1
2
2
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)
3
S
10
1.7
S
8
1.5
S
8
1.5
S
8
1.7
SSE
7
1.5
SSE
6
1.1
S
6
0.8
S
5
0.6
S
10
0.5
S
10
0.8
ENE
7
1.2
E
9
1.7
ENE
10
1.7
ENE
11
1.7
ENE
10
1.5
ENE
10
1.5
ENE
10
1.4
ENE
10
1.3
ENE
10
1.3
ENE
10
1.2
ENE
10
Wave Graph
Metric surfscale
Energy kJ
1454
405
258
273
319
176
78
37
73
54
73
240
573
619
573
432
442
370
314
314
279
Wind (km/h)
20
SSW
20
S
15
SW
20
S
25
S
20
SSW
20
SSW
15
S
15
SSW
15
S
15
S
15
S
5
SE
10
SE
5
WNW
10
NNW
15
NNE
10
NW
10
NNW
15
NE
5
WSW
Wind State
cross
cross-on
cross-off
cross
cross
cross
cross
cross-on
cross
cross
cross-on
cross
cross-on
on
off
cross-off
cross
cross-off
cross-off
cross
cross-off
High Tide
8:55PM1.80m
9:47AM1.18m
9:44PM1.74m
10:35AM1.20m
10:31PM1.62m
11:23AM1.22m
11:18PM1.47m
12:12PM1.24m
00:06AM1.30m
1:01PM1.26m
00:57AM1.14m
1:53PM1.27m
1:54AM1.01m
Low Tide
2:25PM0.23m
3:45AM-0.07m
3:17PM0.24m
4:30AM-0.03m
4:10PM0.28m
5:13AM0.04m
5:05PM0.33m
5:54AM0.13m
6:03PM0.40m
6:34AM0.22m
7:05PM0.46m
7:14AM0.31m
8:15PM0.49m
clear
clear
part cloud
part cloud
part cloud
light rain
light rain
part cloud
rain showers
part cloud
part cloud
part cloud
part cloud
clear
clear
clear
part cloud
part cloud
clear
part cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:00
7:00
6:58
6:58
6:58
6:58
6:56
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:04
5:04
5:05
5:05
5:06
5:07
5:07
 mm
4
1
1
Temp °C
15
14
12
16
16
14
14
15
13
15
15
14
17
16
13
16
16
12
18
19
14
Feels °C
10
10
9
11
11
10
11
13
11
11
12
11
15
15
13
13
13
10
16
16
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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