Surf Forecasts:
Thirroul surf forecast from 17 Sep 2026:
- Best quality surf: Friday 25 Sep, 1AM (local time) - 6ft (1.9m), 7s period, NE swell with cross-offshore winds.
- Most powerful swell: Monday 21 Sep, 10PM (local time) - 8ft (2.5m), 9s period, SSE swell with 1,038 kJ wave energy.
- Next surfable swell (1★+): Friday 18 Sep, 10AM (local time) - 3.5ft (1.1m), 9s period with S 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 Friday (Sep 18) at 10AM. The primary swell is predicted to be 1.1m and 9s period with a secondary swell of 0.8m and 7s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Thirroul in the next 16 days are 2.5m 9s and forecast to arrive on Monday (Sep 21) at 10PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 3s period and expected on Friday (Sep 18) at 7PM.
| Wave Type | Time (AEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 10AM (Fri 18th Sep) | 3.5ft (1.1m) 9s |
| Best Surf | 1AM (Fri 25th Sep) | 6ft (1.9m) 7s |
| Most Powerful | 10PM (Mon 21st Sep) | 8ft (2.5m) 9s |
Table - best surf conditions forecast for Thirroul over the next 16 days.
Short Range ForecastMostly dry. Warm (max 29°C on Sun morning, min 16°C on Sat night). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 3mm), mostly falling on Mon night. Warm (max 30°C on Mon morning, min 12°C on Mon night). Winds decreasing (fresh winds from the SSE on Mon morning, calm by Wed afternoon). | ||||||||||||||||||||
Friday 18 | Saturday 19 | Sunday 20 | Monday 21 | Tuesday 22 | Wednesday 23 | Thursday 24 | |||||||||||||||
AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map |  |  |  |  |  |  |  | ||||||||||||||
Wave Height (m) Direction Period (s) | S 9 | S 9 | SSE 17 | S 9 | S 9 | S 10 | S 9 | SSE 18 | S 10 | S 12 | SSE 6 | SSE 9 | SSE 7 | SSE 10 | SSE 10 | SSE 10 | S 10 | S 10 | S 10 | NE 6 | NE 7 |
Wave Graph  | |||||||||||||||||||||
 kJ | 185 | 136 | 95 | 58 | 40 | 30 | 117 | 178 | 108 | 132 | 280 | 979 | 228 | 399 | 245 | 154 | 141 | 104 | 75 | 178 | 344 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | cross | cross-off | cross-off | off | cross | cross-off | glassy | cross-off | off | cross-on | cross-on | cross-on | cross-on | on | on | glassy | cross-off | cross | cross | cross-off |
High Tide | 12:58PM1.25m | 1:57AM0.85m | 2:06PM1.22m | 3:21AM0.85m | 3:17PM1.23m | 4:28AM0.90m | 4:18PM1.27m | 5:18AM0.97m | 5:08PM1.33m | 5:57AM1.06m | 5:50PM1.39m | 6:32AM1.16m | 6:30PM1.43m | ||||||||
Low Tide | 8:07PM0.47m | 7:08AM0.59m | 9:23PM0.47m | 8:26AM0.60m | 10:27PM0.42m | 9:42AM0.57m | 11:15PM0.36m | 10:42AM0.51m | 11:53PM0.29m | 11:32AM0.44m | 00:27AM0.22m | 12:16PM0.36m | 00:58AM0.16m | ||||||||
 | |  | | | | | | | |  |  | | |  | | |  | |  |  | |
 | 5:52 | — | — | 5:50 | — | — | 5:50 | — | — | 5:48 | — | — | 5:47 | — | — | 5:45 | — | — | 5:43 | — | — |
 | — | 5:49 | — | — | 5:49 | — | — | 5:50 | — | — | 5:51 | — | — | 5:51 | — | — | 5:52 | — | — | 5:52 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | 3 | — | — | — | — | — | — | — | — | 2 |
Temp °C | 22 | 20 | 19 | 26 | 28 | 21 | 29 | 27 | 21 | 30 | 16 | 13 | 15 | 14 | 15 | 15 | 14 | 15 | 21 | 20 | 17 |
Feels °C | 19 | 18 | 13 | 23 | 24 | 16 | 26 | 26 | 16 | 25 | 11 | 8 | 10 | 10 | 12 | 13 | 14 | 13 | 17 | 17 | 16 |
Swell 1 Height (m) Direction Period (s) | S 9 | S 9 | S 9 | S 9 | S 9 | S 10 | S 9 | S 7 | S 10 | S 12 | NE 5 | S 18 | SSE 11 | SSE 10 | SSE 10 | SSE 10 | S 10 | ENE 5 | ENE 6 | S 10 | NE 7 |
| kJ | 185 | 136 | 83 | 58 | 40 | 30 | 117 | 38 | 108 | 132 | 1 | 25 | 153 | 399 | 245 | 154 | 141 | 40 | 36 | 52 | 139 |
Swell 2 Height (m) Direction Period (s) | SE 7 | SE 7 | ESE 7 | SE 7 | ESE 7 | SE 7 | SSE 19 | SSE 18 | SSE 17 | ENE 4 | E 11 | S 18 | S 20 | SSE 18 | SSE 19 | SSE 16 | S 16 | S 10 | S 10 | — | SSE 10 |
| kJ | 62 | 39 | 19 | 14 | 5 | 2 | 72 | 178 | 55 | 2 | 2 | 25 | 8 | 32 | 199 | 82 | 20 | 104 | 75 | — | 33 |
Swell 3 Height (m) Direction Period (s) | SSE 18 | SSE 18 | SSE 17 | SSE 16 | SSE 18 | S 18 | ESE 3 | S 11 | ENE 4 | — | E 12 | — | E 11 | E 11 | E 11 | SSE 19 | SE 19 | E 13 | — | — | E 12 |
| kJ | 31 | 60 | 95 | 52 | 30 | 6 | 1 | 40 | 3 | — | 3 | — | 2 | 2 | 2 | 37 | 14 | 3 | — | — | 3 |
Wind waves Height (m) Direction Period (s) | — | ENE 3 | WSW 3 | WSW 3 | N 5 | SSW 4 | NNW 2 | ENE 4 | NW 2 | — | SSE 6 | SSE 9 | SSE 7 | — | — | E 4 | ENE 5 | N 3 | N 3 | NE 6 | NE 7 |
| kJ | — | 4 | 1 | 1 | 2 | 7 | 1 | 8 | 1 | — | 280 | 979 | 228 | — | — | 14 | 25 | 1 | 3 | 178 | 344 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 6 | 2 | 0 | 0 | 7 | 0 | 0 | 0 | 0 | 211 | 86 | 48 | 86 | 39 | 48 | 0 | 0 | 38 | 301 | 0 |
Best forecast wave conditions in Illawarra | |||||||||||||||||||||
Best forecast wave conditions in Australia | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
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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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