Thirroul Surf Break

Lat Long: 34.32° S 150.93° E

Thirroul Surf Forecast and Surf Report

Issued: 9 am 25 Aug 2026 (local time)

Forecast update in  hr  min

Today's Thirroul sea temperature is
18.0°C
0.6° 

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


Thirroul surf forecast from 25 Aug 2026:

  • Best quality surf: Thursday 27 Aug, 4AM (local time) - 6.5ft (2.0m), 8s period, S swell with glassy winds.
  • Most powerful swell: Saturday 29 Aug, 4AM (local time) - 8ft (2.4m), 9s period, SSE swell with 940 kJ wave energy.
  • Next surfable swell (1★+): Tuesday 25 Aug, 4PM (local time) - 5ft (1.6m), 7s period with NE 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 Tuesday (Aug 25) at 4PM. The primary swell is predicted to be 1.6m and 7s period with a secondary swell of 1.1m and 7s. Another secondary swell of 0.3m and 9s is also forecast. 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 2.4m 9s and forecast to arrive on Saturday (Aug 29) at 4AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.3m 2s period and expected on Tuesday (Sep 01) at 1AM.

Wave TypeTime (AEST) & Date Wave Height & Period
Next good surf (1 star+) 4PM (Tue 25th Aug)5ft (1.6m) 7s
Best Surf 4AM (Thu 27th Aug)6.5ft (2.0m) 8s
Most Powerful 4AM (Sat 29th Aug)8ft (2.4m) 9s

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


The Lowdown

G’day, it’s Rusty. Let’s take a look at what’s shaping up for Thirroul over the next couple of weeks. There’s some real gems early on, then it goes flat and messy, with a faint hope near the end.

We start Tuesday the 25th with some surf – about 4ft from the NE, but the period is short at 6 seconds, so it’s weak and wonky. Combined energy is 255 (weak) and the water temp is 64°, right about average for the season. Wednesday the 26th is no good – cross-shore and onshore winds mess it up.

Thursday the 27th morning is the one. Glassy flat calm, and a solid 6ft south swell rolling in with a 9-second period. Energy jumps to 528 (moderate to strong). That’s the goods – clean, decent size, and proper energy. Definitely a standout. The afternoon turns onshore and iffy, so hit it early.

Friday the 28th morning is another standout. Clean offshore breeze from the SW, 5ft of SSE groundswell with a long 11-second period. Energy is 630 (strong). That direction (SSE) matches the sweet spot for Thirroul (SE), so the banks will be working. Another top call.

Saturday the 29th morning is glassy again, but the swell drops to 4ft with a shorter 8-second period. Still fun, just not as powerful.

Then we hit a long dry patch. From Sunday the 30th afternoon through Friday the 4th of September, it’s onshore winds, chop, and weak or messy surf. A proper lull. There’s a chance Monday the 31st morning with clean 2ft SSE groundswell and a very long 17-second period, but it’s tiny – longboard only.

The blank run stretches over a week until a possible return around Tuesday the 8th of September. That morning goes glassy with 2ft of south swell and a long 12-second period – small but clean. Wednesday the 9th morning brings a bit more size – 5ft from the SSE with a short 7-second period – but clean offshore wind. Worth a peek, but it’s far out and uncertain.

Best bets: Thursday the 27th and Friday the 28th mornings. Clean, good energy, right direction. Don’t miss them. After that, it’s a waiting game.

Rusty

Short Range Forecast

Moderate rain (total 11mm), heaviest on Tue night. Very mild (max 18°C on Tue morning, min 10°C on Thu night). Wind will be generally light.

Days 4-6 Weather Summary

Mostly dry. Very mild (max 17°C on Sat morning, min 10°C on Sat night). Wind will be generally light.

Tuesday
25
Wednesday
26
Thursday
27
Friday
28
Saturday
29
Sunday
30
Monday
31
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
2
1
0
0
2
3
1
2
3
0
1
2
0
2
0
0
3
2
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)
1.3
NE
6
1.6
NE
7
1.1
NE
8
0.8
ENE
8
1.5
S
6
2
S
8
1.7
S
9
1.3
S
9
0.7
SSE
12
1.5
SSE
11
1.4
SSE
10
1.4
SSE
9
1.3
SSE
8
1
S
10
1
S
9
1.5
S
9
0.5
SSE
19
0.9
SSE
19
0.5
SSE
17
1
S
12
0.9
SSE
12
Wave Graph
Metric surfscale
Energy kJ
145
277
136
76
190
529
463
269
125
511
394
348
223
192
155
372
199
495
164
289
236
Wind (km/h)
10
N
10
N
10
NW
20
SSW
25
S
10
S
0
ENE
10
SE
10
NW
10
SSW
15
SSE
10
SSW
0
ESE
10
ENE
5
W
15
SSE
15
SSE
5
W
10
N
25
NE
10
NW
Wind State
cross-off
cross-off
off
cross
cross-on
cross
glassy
on
off
cross-off
cross-on
cross
glassy
cross-on
off
cross-on
cross-on
off
cross-off
cross
cross-off
High Tide
6:26PM1.45m
7:08AM1.06m
7:04PM1.50m
7:42AM1.13m
7:41PM1.53m
8:16AM1.21m
8:16PM1.53m
8:51AM1.27m
8:52PM1.50m
9:26AM1.33m
9:30PM1.43m
10:03AM1.38m
10:11PM1.34m
Low Tide
11:56AM0.43m
1:12AM0.23m
12:39PM0.37m
1:44AM0.17m
1:19PM0.32m
2:15AM0.13m
1:59PM0.28m
2:45AM0.11m
2:40PM0.25m
3:16AM0.11m
3:22PM0.25m
3:48AM0.13m
4:08PM0.25m
light rain
light rain
mod rain
rain showers
part cloud
cloud
part cloud
clear
clear
clear
clear
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:24
6:22
6:22
6:20
6:20
6:18
6:16
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:31
5:32
5:32
5:34
5:35
5:35
5:36
 mm
1
2
6
2
Temp °C
18
17
15
16
16
14
15
15
12
16
16
14
17
16
12
16
15
12
19
18
14
Feels °C
16
16
15
13
12
12
15
13
10
12
13
11
15
14
11
13
12
11
16
14
13
  • 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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