Thirroul Surf Break

Lat Long: 34.32° S 150.93° E

Thirroul Surf Forecast and Surf Report

Issued: 9 pm 01 Aug 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 1 Aug 2026:

  • Best quality surf: Sunday 2 Aug, 4AM (local time) - 4.5ft (1.3m), 11s period, SSE swell with offshore winds.
  • Most powerful swell: Sunday 2 Aug, 10AM (local time) - 5ft (1.6m), 12s period, SE swell with 785 kJ wave energy.
  • Next surfable swell (1★+): Sunday 2 Aug, 4AM (local time) - 4.5ft (1.3m), 11s period with SSE 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 (Aug 02) at 4AM. The primary swell is predicted to be 1.3m and 11s period with a secondary swell of 0.8m and 14s. The wind is predicted to be offshore as the swell arrives.

The most powerful waves expected at Thirroul in the next 16 days are 1.6m 12s and forecast to arrive on Sunday (Aug 02) at 10AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 3s period and expected on Tuesday (Aug 04) at 4PM.

Wave TypeTime (AEST) & Date Wave Height & Period
Next good surf (1 star+) 4AM (Sun 2nd Aug)4.5ft (1.3m) 11s
Best Surf 4AM (Sun 2nd Aug)4.5ft (1.3m) 11s
Most Powerful10AM (Sun 2nd Aug)5ft (1.6m) 12s

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


The Lowdown

G'day, Rusty here. Let’s have a look at what’s coming up for Thirroul. This stretch has a solid SE swell window, and the next couple of weeks are a mixed bag. There’s a bit of a wait for the real quality, but patience will pay off.

Right now, we’re in a quiet patch. No surf worth grabbing a board for until Sunday, August 2nd. The wait is short, though.

Sunday morning, August 2nd, is where it starts. Thirroul picks up a 5ft SE groundswell with a 12-second period. The energy is solid (800). NW wind is blowing cross-offshore, keeping it clean. The water temp is about average for this time of year. This is the standout of the first week. The break is a beach and reef setup, so that long-period SE swell will wrap in nicely, offering some clean lines. Crowds are possible here, so don't expect to have it to yourself.

Sunday afternoon goes a bit average. The wind swings NE and the swell drops to 5ft, but it gets a cross-shore bump and the surf becomes more marginal.

Monday, August 3rd, the swell backs right off to 3ft, with NW offshore wind in the morning. It’s small and clean, but weak (169). Not worth a special trip.

Tuesday, August 4th, is a write-off. Swell drops to 0.7ft. Flat.

Wednesday, August 5th, sees a short-period S swell push in at 3ft, blowing cross-offshore, but it’s weak and ordinary. The afternoon picks up a little to 5ft, but still short period and messy.

Now, Thursday, August 6th, is a nice little window. Morning glassy conditions with a 5ft S swell, 8-second period, and clean. The energy is moderate (260). This is fun, small-wave surfing.

Friday, August 7th, the swell builds to 6ft in the morning, S direction, 9 seconds, but it’s cross-shore. By afternoon, it’s 7ft with a strong cross-on wind and 1006 energy, turning it into a choppy mess.

Saturday, August 8th, the swell hangs around 6ft, but the wind is cross-shore and the quality is poor. Not your day.

Sunday, August 9th, the swell drops to 4ft with a N cross-off in the morning. Clean but small. The afternoon gets ruined by a strong NE wind.

Monday, August 10th, is another near-flat day with tiny swell.

Tuesday, August 11th, now we’re talking. Morning offshore NW wind, 4ft ESE swell with an 11-second period. The energy is solid (371). The afternoon goes glassy. This is a beautiful, clean, long-period groundswell. It’s the second standout of the outlook. The longer period will make it peel nicely at the reefy sections.

Wednesday, August 12th, keeps it going. 5ft ESE swell, 10 seconds, with light NNW cross-off. Clean and fun. The energy is moderate (389).

Thursday, August 13th, things get serious. The swell jumps to 10ft from the S, but the wind is a fresh cross-shore, 30 km/h. This is big, powerful, and lumpy. The energy is strong (1635). This is for experts only, and even then, the wind is making it a battle.

Friday, August 14th, the swell peaks at 12ft from the SSE, with a massive 4622 energy. The wind is cross-shore, and the period is 10 seconds. This is a heavy, powerful, messy day. Only for the experienced, and you’ll be fighting the wind.

Saturday, August 15th, the swell backs off to 7ft, still cross-on. The quality is marginal.

Sunday, August 16th, a nice reset. Glassy morning, 4ft SSE swell, 10 seconds, with 396 energy. Clean and inviting. This is a good, gentle session.

Monday, August 17th, another glassy morning with 5ft S swell, 9 seconds, and 382 energy. A clean, fun way to start the week.

So, the real standouts are Sunday morning, August 2nd, and Tuesday, August 11th. Both offer clean, quality surf at Thirroul. The big swell in the middle of the second week is powerful but wind-shredded. Keep an eye on the glassy mornings towards the end.

Rusty.

Short Range Forecast

Mostly dry. Warm (max 22°C on Mon morning, min 8°C on Mon night). Wind will be generally light.

Days 5-7 Weather Summary

Mostly dry. Very mild (max 16°C on Wed morning, min 8°C on Wed night). Wind will be generally light.

Sunday
2
Monday
3
Tuesday
4
Wednesday
5
Thursday
6
Friday
7
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
1
1
1
0
0
0
1
1
1
2
1
3
1
0
2
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.4
SE
11
1.6
SE
12
1.4
SE
12
1.1
SE
11
0.8
SE
10
0.7
SE
10
0.4
SE
10
0.2
SSE
10
0.2
E
14
0.5
S
6
0.8
S
7
1.4
S
7
1.3
S
8
1.4
S
8
1.6
S
9
1.9
SSE
9
1.7
S
9
2
S
8
1.7
SSE
8
Wave Graph
Metric surfscale
Energy kJ
530
785
514
314
156
104
28
10
16
18
61
206
187
251
412
653
473
559
361
Wind (km/h)
10
NW
15
NNW
20
NE
10
NW
15
NW
10
NW
10
WSW
20
W
20
W
20
W
15
SW
15
WSW
10
W
5
WSW
10
ESE
10
W
5
S
20
S
15
SW
Wind State
off
cross-off
cross
off
off
off
cross-off
off
cross-off
cross-off
cross-off
cross-off
cross-off
glassy
on
cross-off
cross
cross-on
cross-off
High Tide
10:38AM1.21m
10:31PM1.41m
11:18AM1.25m
11:13PM1.31m
12:03PM1.29m
00:01AM1.20m
12:53PM1.32m
1:01AM1.09m
1:52PM1.36m
2:15AM1.00m
2:58PM1.41m
3:39AM0.97m
Low Tide
4:29AM0.14m
4:22PM0.36m
5:02AM0.16m
5:11PM0.39m
5:38AM0.20m
6:07PM0.41m
6:19AM0.25m
7:13PM0.42m
7:08AM0.31m
8:30PM0.40m
8:07AM0.36m
9:51PM0.34m
clear
clear
clear
part cloud
cloud
clear
clear
clear
clear
clear
part cloud
clear
clear
clear
clear
clear
clear
clear
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:48
6:48
6:47
6:46
6:46
6:45
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:15
5:15
5:16
5:17
5:17
5:19
 mm
Temp °C
12
18
17
13
22
21
13
16
15
10
16
15
10
16
15
11
16
15
12
Feels °C
10
14
12
10
17
17
9
9
9
4
12
10
6
13
12
8
12
11
9
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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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