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Thirroul Surf Forecast
/ NSW – Illawarra (42 breaks) / New South Wales (297 breaks) /
Surf Forecasts:
Thirroul surfForecast / NSW – Illawarra / Australia
16 Day Weather and Surf, issued 9 am Wednesday 20 May 2026 AESTForecast update in hr min s Forecast update imminent
Thirroul surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Thirroul sea temperature is
20.2° C
(Which is normal for this time of year)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 Wednesday (May 20) at 7PM. The primary swell is predicted to be 2.1m and 10s period with a secondary swell of 1.7m and 9s. Another secondary swell of 1.3m and 10s 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 2.2m 12s and forecast to arrive on Sunday (May 24) at 10PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 4s period and expected on Monday (May 25) at 10AM.
| Wave Type | Time (AEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 7PM (Wed 20th May) | 7ft (2.1m) 10s |
| Best Surf | 7PM (Wed 20th May) | 7ft (2.1m) 10s |
| Most Powerful | 10PM (Sun 24th May) | 7ft (2.2m) 12s |
Table - best surf conditions forecast for Thirroul over the next 16 days.
Updates in hr min s Forecast update imminent
Short Range ForecastSome drizzle, heaviest during Fri morning. Very mild (max 17°C on Wed morning, min 12°C on Wed night). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 6mm), mostly falling on Sun night. Warm (max 20°C on Sun morning, min 11°C on Mon night). Wind will be generally light. | ||||||||||||||||||||
Wednesday 20 | Thursday 21 | Friday 22 | Saturday 23 | Sunday 24 | Monday 25 | Tuesday 26 | |||||||||||||||
AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map |  |  |  |  |  |  |  | ||||||||||||||
S 9 | S 9 | S 10 | S 9 | SSE 8 | SSE 8 | SE 7 | E 9 | ESE 10 | ESE 9 | E 10 | E 11 | E 11 | E 12 | E 12 | E 12 | E 12 | E 12 | S 8 | E 11 | E 12 | |
1015 | 803 | 876 | 710 | 448 | 314 | 118 | 137 | 676 | 415 | 900 | 1172 | 1148 | 1324 | 1207 | 1092 | 972 | 702 | 731 | 491 | 535 | |
Wind (km/h) | |||||||||||||||||||||
cross-off | cross-on | cross-off | cross | cross | cross | cross | cross-on | cross-on | cross-on | cross-on | cross-off | glassy | cross | cross-off | cross-off | cross | cross-off | cross | cross | cross-off | |
High Tide | 11:17AM1.07m | 11:09PM1.65m | 12:21PM1.04m | 00:08AM1.55m | 1:27PM1.05m | 1:11AM1.44m | 2:33PM1.09m | 2:15AM1.33m | 3:32PM1.16m | 3:18AM1.24m | 4:23PM1.24m | 4:18AM1.16m | 5:07PM1.32m | ||||||||
Low Tide | 4:36PM0.37m | 6:11AM0.06m | 5:37PM0.44m | 7:11AM0.11m | 6:47PM0.49m | 8:10AM0.17m | 8:03PM0.51m | 9:03AM0.21m | 9:18PM0.50m | 9:51AM0.25m | 10:27PM0.46m | 10:34AM0.28m | 11:26PM0.41m | ||||||||
 |  |  | | |  |  | | | | |  | | | | |  |  | | | | |
 | 6:45 | — | — | 6:45 | — | — | 6:46 | — | — | 6:47 | — | — | 6:48 | — | — | 6:48 | — | — | 6:48 | — | — |
 | — | 5:00 | — | — | 4:59 | — | — | 4:58 | — | — | 4:58 | — | — | 4:57 | — | — | 4:57 | — | — | 4:55 | — |
— | — | — | — | — | — | 1 | — | — | — | — | 1 | — | — | 3 | — | — | 2 | 3 | — | — | |
Temp °C | 17 | 16 | 13 | 17 | 17 | 14 | 16 | 16 | 16 | 18 | 17 | 16 | 20 | 20 | 16 | 16 | 16 | 15 | 15 | 16 | 12 |
13 | 12 | 9 | 13 | 13 | 11 | 13 | 14 | 14 | 17 | 16 | 16 | 19 | 19 | 15 | 13 | 13 | 11 | 9 | 9 | 8 | |
Swell 1 Height (m) Direction Period (s) | S 9 | S 9 | S 10 | E 10 | E 10 | SSE 8 | SE 7 | E 9 | ESE 10 | ESE 9 | E 10 | E 11 | E 11 | E 12 | E 12 | E 12 | E 12 | E 12 | S 8 | E 11 | E 12 |
 kJ | 679 | 544 | 602 | 260 | 250 | 314 | 118 | 137 | 676 | 415 | 900 | 1172 | 1148 | 1324 | 1207 | 1092 | 972 | 702 | 447 | 491 | 535 |
Swell 2 Height (m) Direction Period (s) | ENE 10 | ENE 10 | ENE 10 | — | — | ENE 10 | S 8 | SSE 7 | S 7 | E 11 | S 21 | S 16 | S 8 | S 13 | S 11 | S 16 | SSE 15 | SSE 14 | E 12 | — | SSE 7 |
| kJ | 441 | 377 | 324 | — | — | 163 | 74 | 60 | 27 | 248 | 8 | 21 | 5 | 3 | 9 | 5 | 44 | 39 | 517 | — | 199 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | E 6 | E 9 | S 8 | — | S 8 | S 13 | — | S 14 | — | — | S 16 | S 10 | — | — | — | S 18 |
| kJ | — | — | — | — | — | 18 | 110 | 18 | — | 10 | 3 | — | 4 | — | — | 21 | 2 | — | — | — | 6 |
Wind waves Height (m) Direction Period (s) | S 9 | S 9 | S 10 | S 9 | SSE 8 | — | — | ESE 7 | — | — | — | — | — | — | W 3 | SSW 4 | S 6 | S 8 | S 8 | SSE 8 | — |
| kJ | 1015 | 803 | 876 | 710 | 448 | — | — | 82 | — | — | — | — | — | — | 5 | 16 | 39 | 666 | 731 | 416 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 27 | 5 | 11 | 11 | 5 | 11 | 5 | 11 | 5 | 5 | 0 | 0 | 2 | 0 | 0 | 11 | 0 | 74 | 48 | 0 |
Best forecast wave conditions in Illawarra | |||||||||||||||||||||
Best forecast wave conditions in Australia | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
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FREE! Surf-Forecast.com widget for your website
The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Thirroul surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
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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