Thirroul Surf Break

Lat Long: 34.32° S 150.93° E

Thirroul Surf Forecast and Surf Report

Issued: 9 pm 19 Jul 2026 (local time)

Forecast update in  hr  min

Today's Thirroul sea temperature is
18.5° C
1.1° 

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


Thirroul surf forecast from 19 Jul 2026:

  • Best quality surf: Sunday 26 Jul, 4AM (local time) - 7ft (2.2m), 10s period, S swell with cross-offshore winds.
  • Most powerful swell: Sunday 26 Jul, 4AM (local time) - 7ft (2.2m), 10s period, S swell with 913 kJ wave energy.
  • Next surfable swell (1★+): Monday 20 Jul, 4AM (local time) - 5ft (1.6m), 11s 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 Monday (Jul 20) at 4AM. The primary swell is predicted to be 1.6m and 11s period with a secondary swell of 0.6m and 12s. The wind is predicted to be offshore as the swell arrives.

The most powerful waves expected at Thirroul in the next 16 days are 2.2m 10s and forecast to arrive on Sunday (Jul 26) at 4AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 5s period and expected on Wednesday (Jul 22) at 1AM.

Wave TypeTime (AEST) & Date Wave Height & Period
Next good surf (1 star+) 4AM (Mon 20th Jul)5ft (1.6m) 11s
Best Surf 4AM (Sun 26th Jul)7ft (2.2m) 10s
Most Powerful 4AM (Sun 26th Jul)7ft (2.2m) 10s

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


The Lowdown

Alright, let's talk about what’s on the cards for the next couple of weeks.

Honestly, the first week is a bit of a mixed bag. We’ve got some good clean windows, but nothing to get properly excited about until the end of the month. The real story is a big pulse of energy that’s forecast to roll in late next week, around the 30th of July. That’s the one to mark on your calendar.

For the immediate future, Thirroul is your spot. Monday morning the 20th of July is the pick of the early days. We’re looking at a clean 5ft swell from the ENE, with a nice 11-second period pushing in. There’s a light offshore breeze from the NNW, so the face will be clean. The combined wave energy is sitting at 723, which is a solid, workable amount of power. It’s a decent start to the week.

The swell drops off a bit through Tuesday and Wednesday, but the mornings remain clean with light offshores. The wave energy drops into the low hundreds, so it’s smaller and more relaxed. The wind holds for the morning sessions, making it worthwhile for a longboard or a funboard.

Now, Thursday the 23rd of July, the swell drops right out. The energy is down in the 70s and 80s. It’s pretty flat, so give it a miss.

Friday the 24th of July sees a new S swell showing up. The morning brings a clean 5ft from the south, with a 9-second period. The wind is a light cross-off from the WSW, so it’s clean. The energy is back up to 413. This is a good little window.

The weekend of the 25th and 26th of July is interesting. Saturday afternoon has a bump in energy to 496 with a 4ft S swell and a 12-second period, but the wind is a bit of a cross-off. But Sunday morning the 26th of July is a standout. The wind drops to absolutely glassy, zero knots from the S. The swell is 5ft from the south, with a 10-second period and energy of 444. That glassy morning is going to be beautiful. The afternoon gets a bit onshore, so get it early.

The early part of the following week, Monday the 27th and Tuesday the 28th, is small and ordinary. The energy is low, and the swell is only around 2ft to 3ft. It’s not really worth paddling out for.

Then we hit the big event. Thursday the 30th of July is the one. The forecast shows a massive S swell arriving. The morning is a powerful 12ft from the south, with an 11-second period, and the wave energy is a huge 5097. That’s proper, heavy energy. The wind is a cross-off from the W at 15 mph, so it’s going to be raw and powerful. This is for experienced surfers only. The afternoon gets even bigger, with a 13ft S swell, a 13-second period, and a massive 8046 energy reading. The wind stays cross-off. This is a solid, solid groundswell.

Friday the 31st of July keeps the size at 10ft from the SSE, but the wind turns onshore and choppy in the afternoon. Morning is still workable with a light cross-shore, but the size is still big. Saturday the 1st of August is similar, with 8ft to 10ft, but the wind is onshore again. It’s big, but messy.

The pick of the second week might actually be Sunday the 2nd of August. The swell is still 7ft from the SSE, but the wind is glassy in the morning. The energy is 868. That’s a clean, big morning that’s worth a look.

The water temperature is about average for this time of year at Thirroul, so nothing unusual to report on that front.

The 30th of July is the big one. It’s a long-range call, so keep an eye on it, but if it holds, that’s the swell of the month. It’s an exposed beach and reef setup, so it’ll handle the size, but the period is long, so it might be a bit straight at the beach. The reef should be the go.

Rusty.

Short Range Forecast

Mostly dry. Warm (max 20°C on Wed morning, min 10°C on Sun night). Wind will be generally light.

Days 5-7 Weather Summary

Mostly dry. Very mild (max 19°C on Sat morning, min 6°C on Thu night). Wind will be generally light.

Monday
20
Tuesday
21
Wednesday
22
Thursday
23
Friday
24
Saturday
25
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
3
3
1
2
2
1
2
1
1
1
0
0
2
2
2
1
1
2
3
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.6
ENE
10
1.6
ENE
11
1.6
ENE
11
1.4
ENE
10
1.3
ENE
10
1.2
ENE
10
1.1
ENE
10
1
ENE
10
1
ENE
10
0.8
ENE
10
0.7
ENE
9
0.5
ENE
9
1.8
S
8
1.6
S
9
1.2
S
10
1.1
S
11
1
S
12
1.2
S
12
1.8
S
11
Wave Graph
Metric surfscale
Energy kJ
540
561
572
419
331
286
235
175
179
103
76
46
378
377
273
302
266
383
776
Wind (km/h)
5
WSW
10
NNW
15
NNE
10
NW
10
NNW
15
NE
10
NW
10
W
15
WSW
10
WNW
25
W
25
W
25
WSW
5
WSW
10
NW
25
WSW
20
WSW
15
SW
10
W
Wind State
cross-off
cross-off
cross
cross-off
cross-off
cross
off
off
cross-off
off
cross-off
cross-off
cross-off
cross-off
off
cross-off
cross-off
cross-off
cross-off
High Tide
00:06AM1.30m
1:01PM1.26m
00:57AM1.14m
1:53PM1.27m
1:54AM1.01m
2:46PM1.28m
3:00AM0.92m
3:41PM1.30m
4:12AM0.87m
4:35PM1.33m
5:17AM0.88m
5:25PM1.37m
Low Tide
6:34AM0.22m
7:05PM0.46m
7:14AM0.31m
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
clear
clear
clear
clear
clear
clear
clear
cloud
cloud
clear
part cloud
clear
clear
clear
clear
clear
clear
part cloud
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:58
6:56
6:56
6:56
6:56
6:54
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:07
5:07
5:07
5:08
5:08
5:09
 mm
Temp °C
12
17
17
11
17
17
13
20
19
14
16
15
9
14
14
11
19
18
11
Feels °C
12
14
14
9
14
14
11
17
15
11
10
8
2
11
10
5
14
14
8
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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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