Thirroul Surf Break

Lat Long: 34.32° S 150.93° E

Thirroul Surf Forecast and Surf Report

Issued: 3 am 19 Jul 2026 (local time)

Forecast update in  hr  min

Today's Thirroul sea temperature is
18.2° C
0.8° 

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


Thirroul surf forecast from 18 Jul 2026:

  • Best quality surf: Sunday 19 Jul, 7PM (local time) - 5ft (1.6m), 10s period, ENE swell with glassy winds.
  • Most powerful swell: Friday 24 Jul, 1AM (local time) - 7ft (2.1m), 9s period, S swell with 766 kJ wave energy.
  • Next surfable swell (1★+): Sunday 19 Jul, 7PM (local time) - 5ft (1.6m), 10s 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 Sunday (Jul 19) at 7PM. The primary swell is predicted to be 1.6m and 10s period with a secondary swell of 0.5m and 13s. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Thirroul in the next 16 days are 2.1m 9s and forecast to arrive on Friday (Jul 24) at 1AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.8m 4s period and expected on Friday (Jul 24) at 10PM.

Wave TypeTime (AEST) & Date Wave Height & Period
Next good surf (1 star+) 7PM (Sun 19th Jul)5ft (1.6m) 10s
Best Surf 7PM (Sun 19th Jul)5ft (1.6m) 10s
Most Powerful 1AM (Fri 24th Jul)7ft (2.1m) 9s

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


The Lowdown

Alright, Rusty here. Let’s talk about what’s cooking at Thirroul.

First up, the water temp is sitting at a pretty normal 65°, dead on for this time of year, so no surprises there.

The next few days are a bit of a mixed bag. Sunday the 19th sees some chest-high swell around 6 ft, pushing in from the ENE with a solid 11-second period. The energy is moderate (869), but the wind is a light cross or cross-on, so it’s going to be a bit lumpy. It’s surfable, but not the best look.

Monday the 20th is a step up. The swell drops a touch to 5 ft, still ENE, but the morning brings a clean, cross-off breeze from the NW. That’s the pick of the early week – clean lines, light winds, and the wave energy is still decent (723). The afternoon gets a bit messy as the wind swings cross-shore, so get on it early.

Tuesday the 21st drops off a little, with 4 ft swell and energy down to 370. The morning is still clean with a light cross-off, but it’s not going to set the world on fire. Wednesday and Thursday fade further, with the swell dropping under 3 ft and the energy falling away. Winds pick up, making it choppy and average. There’s a gap here where it’s pretty ordinary.

Then, late in the first week, things get interesting. On Saturday the 25th, a long-period SSE groundswell arrives, with a 16-second period, pushing 5 ft by the afternoon. The energy jumps to 562, and the wind goes offshore from the W. That’s a promising sign of cleaner, more powerful lines. Sunday the 26th is smaller again, but with clean offshore winds in the morning, it’s a good one for a session.

Now, the real standout is further out. On Tuesday the 28th, we get a proper pulse. The morning is glassy – dead flat calm, wind from the WNW at just 3 mph – and the swell is 6 ft from the SSE with a 17-second period. The energy is huge (2676). That’s a very long-period groundswell, so it’s going to be powerful and clean, but it’s best suited for the point and reef breaks around here, not the beach. The afternoon on the 28th pushes 10 ft, but it gets a bit messy with a cross-shore wind. That morning is for experienced surfers only.

Wednesday the 29th keeps the good run going, with 7 ft in the morning, clean offshore from the WNW, and energy at 1379. That’s another top session for the crew who know what they’re doing. The swell drops a bit after that, but the quality holds through the end of the week.

Looking further ahead into the second week, the first of August sees a big increase again, with 7 ft on Saturday morning, but the wind is moderate and the energy is strong (1025). Sunday the 2nd gets blown out by a strong offshore wind at 25 mph – clean, but hard to paddle into. Then Monday the 3rd is a monster: 8 ft from the SSE with a 13-second period, energy of 2243, and light offshore wind. That’s a serious swell for experts only, and it’s going to be a standout session if the forecast holds.

Overall, the best on offer is the Tuesday the 28th morning glassy session, and the Monday the 3rd morning for the big wave hunters. The mid-week gap is real, but it comes good again.

- Rusty

Short Range Forecast

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

Days 4-6 Weather Summary

Mostly dry. Warm (max 21°C on Wed morning, min 7°C on Thu night). Wind will be generally light.

Sunday
19
Monday
20
Tuesday
21
Wednesday
22
Thursday
23
Friday
24
Saturday
25
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
3
3
1
2
2
0
2
1
0
1
0
1
3
1
1
0
1
2
1
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.7
ENE
11
1.7
ENE
11
1.6
ENE
11
1.6
ENE
11
1.6
ENE
11
1.4
ENE
10
1.3
ENE
10
1.2
ENE
10
1.2
ENE
10
1
ENE
10
0.9
ENE
9
0.8
ENE
9
0.7
ENE
9
1.5
S
9
2.1
S
9
1.3
S
8
1.1
S
10
0.7
S
10
0.8
SSE
16
1.4
S
12
1.3
S
11
Wave Graph
Metric surfscale
Energy kJ
705
631
551
561
572
419
314
263
275
172
133
94
71
359
766
239
230
98
284
555
388
Wind (km/h)
10
S
5
SE
5
W
10
NW
15
NNE
10
NW
10
NNW
15
NNE
10
NW
10
WNW
20
W
15
W
25
W
20
WSW
20
WSW
20
W
25
W
20
W
20
W
30
W
20
WSW
Wind State
cross
cross-on
off
cross-off
cross
cross-off
cross-off
cross
cross-off
off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
off
cross-off
High Tide
12:12PM1.24m
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
6:03PM0.40m
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
part cloud
clear
clear
clear
clear
part cloud
clear
part cloud
clear
part cloud
part cloud
clear
clear
clear
clear
clear
clear
clear
part cloud
part cloud
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:58
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>
5:06
5:07
5:07
5:07
5:08
5:08
5:09
 mm
Temp °C
15
15
12
17
17
11
17
17
12
21
19
15
15
15
8
15
14
12
16
15
13
Feels °C
13
14
12
14
14
9
14
14
11
18
14
11
8
9
2
8
7
7
10
9
7
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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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