Thirroul Surf Break

Lat Long: 34.32° S 150.93° E

Thirroul Surf Forecast and Surf Report

Issued: 3 pm 05 Aug 2026 (local time)

Forecast update in  hr  min

Today's Thirroul sea temperature is
18.1° 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 5 Aug 2026:

  • Best quality surf: Tuesday 11 Aug, 4AM (local time) - 3.5ft (1.0m), 11s period, S swell with offshore winds.
  • Most powerful swell: Monday 10 Aug, 4AM (local time) - 10ft (3.0m), 8s period, NE swell with 999 kJ wave energy.
  • Next surfable swell (1★+): Thursday 6 Aug, 4AM (local time) - 1.5ft (0.4m), 10s 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 Thursday (Aug 06) at 4AM. The primary swell is predicted to be 0.4m and 10s period with a secondary swell of 0.3m and 5s. 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 3.0m 8s and forecast to arrive on Monday (Aug 10) at 4AM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 4s period and expected on Monday (Aug 10) at 10AM.

Wave TypeTime (AEST) & Date Wave Height & Period
Next good surf (1 star+) 4AM (Thu 6th Aug)1.5ft (0.4m) 10s
Best Surf 4AM (Tue 11th Aug)3.5ft (1.0m) 11s
Most Powerful 4AM (Mon 10th Aug)10ft (3.0m) 8s

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


The Lowdown

G’day, it’s Rusty. Look, I’ll be straight with you—Thirroul’s been a bit of a mixed bag lately, but there’s some real light at the end of the tunnel if you’re willing to wait. The water’s sitting at 65°, which is about average for this time of year, so nothing unusual there.

The first couple of days are pretty ordinary. Wednesday the 5th has tiny 1.0ft swell from the east with a 9-second period, and while the wind is cross-off, it’s just not enough to get excited about—weak energy (25). Thursday morning the 6th sees a slight bump to 3ft from the south, period 8 seconds, and clean cross-off wind, but it’s still just surfable, nothing special. Thursday afternoon gets messy with cross-on wind. Friday the 7th is similar—small, cleanish in the morning but nothing to write home about. Saturday morning the 8th is glassy with 1ft, but it’s tiny. Sunday the 9th has a bit more size at 3ft from the ENE, but the wind is cross-off in the morning, then turns cross with light rain in the arvo.

Now, Monday the 10th is where it starts to get interesting. Morning sees a solid 7ft swell from the ENE, period 9 seconds, with a fresh offshore from the WNW—clean as a whistle. Energy is strong (672). That’s a solid step up, but at 7ft it’s pushing into the zone where beginners might want to sit it out. Still, for the experienced crew, that’s a good session. The offshore wind holds through the afternoon, dropping to 5ft.

Tuesday the 11th brings a groundswell—2ft from the SSE, but with a long 13-second period, so there’s real push. Energy is strong (346), and the wind is moderate offshore in the morning. That long period means the waves will have some shape and power, but they’ll be a bit straighter on a beach break—still, Thirroul’s reef can handle it. It’s a solid option.

The middle of the week stays small and cleanish but nothing special. Then Thursday the 13th afternoon gets a bit wild—7ft from the south, period 12 seconds, but with cross-on wind, so it’s choppy and messy. Energy is huge (1869), but the wind kills it. Friday the 14th has 6ft and 5ft from the south, but again cross-on wind—marginal at best.

Saturday the 15th morning is the first real standout in the second week. Glassy conditions, 4ft from the south, period 9 seconds, with moderate energy (248). The waves will be clean and fun, good for a wide range of surfers. That’s a top pick for the near future.

Then we hit a big gap with poor conditions until Monday the 17th, which brings a 8ft swell from the south and 10ft from the SSE, but with cross-on wind—not ideal for paddling, honestly looks more like a kite-surfing setup if you’re into that.

But the real gold is on Tuesday the 18th and Wednesday the 19th. Tuesday morning: 10ft from the SSE, period 11 seconds, light cross-off from the north, clean. Energy is massive (4274). That’s pumping, but at 10ft it’s strictly for experts—big, powerful, and not for the faint-hearted. Wednesday morning: 8ft from the SE, period 12 seconds, again clean with cross-off wind. Energy is still huge (1999). These two days are the best on offer, no question. The long period will work well on Thirroul’s reef and point sections, giving proper waves.

Thursday the 20th drops to 6ft and 5ft from the SE, period 11 seconds, with cross-off wind—still clean and fun, but not as standout.

The best of the bunch? Saturday the 15th morning for a clean, fun session for everyone, and Tuesday the 18th morning for the experienced crew chasing big, clean groundswell. Don’t sleep on the 18th—it’s gonna be a memorable one.

Rusty.

Short Range Forecast

Mostly dry. Very mild (max 18°C on Wed afternoon, min 8°C on Wed night). Wind will be generally light.

Days 5-7 Weather Summary

Light rain (total 3mm), mostly falling on Sun night. Very mild (max 17°C on Tue morning, min 8°C on Sat night). Winds increasing (light winds from the NNW on Sun morning, strong winds from the WNW by Sun night).

Wed
5
Thursday
6
Friday
7
Saturday
8
Sunday
9
Monday
10
Tuesday
11
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
0
0
1
0
1
1
0
1
1
0
1
1
0
1
2
1
0
2
1
1
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.3
E
9
0.3
SSE
11
0.8
S
8
0.9
S
8
0.5
S
9
0.7
SSE
9
0.7
SSE
9
0.5
SSE
9
0.5
S
8
0.4
SE
9
0.6
E
8
0.9
ENE
8
0.9
ENE
9
1.4
NE
6
2
ENE
9
1.4
ENE
10
0.8
ENE
9
0.7
SSE
13
1
S
9
0.6
S
8
Wave Graph
Metric surfscale
Energy kJ
15
23
84
95
38
86
84
47
31
19
45
103
113
152
672
342
113
178
162
50
Wind (km/h)
15
WSW
20
WSW
5
WSW
15
ENE
10
W
10
WSW
15
SE
10
W
5
N
20
NE
10
NW
10
NNW
15
NNE
30
NW
35
W
30
W
25
W
20
W
15
W
10
NW
Wind State
cross-off
cross-off
cross-off
cross-on
off
cross-off
cross-on
off
glassy
cross-on
cross-off
cross-off
cross
off
off
off
cross-off
off
cross-off
cross-off
High Tide
1:01AM1.09m
1:52PM1.36m
2:15AM1.00m
2:58PM1.41m
3:39AM0.97m
4:05PM1.49m
4:58AM0.98m
5:10PM1.58m
6:05AM1.04m
6:08PM1.67m
7:01AM1.10m
7:01PM1.73m
Low Tide
7:13PM0.42m
7:08AM0.31m
8:30PM0.40m
8:07AM0.36m
9:51PM0.34m
9:16AM0.39m
11:05PM0.25m
10:26AM0.38m
00:08AM0.14m
11:31AM0.33m
1:02AM0.05m
12:29PM0.28m
1:50AM-0.01m
part cloud
clear
clear
part cloud
clear
clear
clear
clear
clear
clear
part cloud
cloud
light rain
rain showers
part cloud
clear
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:46
6:45
6:43
6:43
6:41
6:41
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:17
5:17
5:19
5:20
5:21
5:21
5:22
 mm
1
2
Temp °C
18
12
16
16
11
17
15
11
16
16
11
14
14
16
14
14
11
17
18
10
Feels °C
13
7
13
12
8
13
11
9
12
12
9
10
9
11
6
7
4
12
13
6
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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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