Surf Forecasts:
Thirroul surf forecast from 6 Sep 2026:
- Best quality surf: Thursday 10 Sep, 10PM (local time) - 8ft (2.5m), 10s period, SSE swell with cross-offshore winds.
- Most powerful swell: Wednesday 9 Sep, 10PM (local time) - 13ft (4.0m), 9s period, S swell with 2,457 kJ wave energy.
- Next surfable swell (1★+): Monday 7 Sep, 1AM (local time) - 5ft (1.6m), 8s 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 Monday (Sep 07) at 1AM. The primary swell is predicted to be 1.6m and 8s period with a secondary swell of 0.2m and 10s. 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 4.0m 9s and forecast to arrive on Wednesday (Sep 09) at 10PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 3s period and expected on Saturday (Sep 12) at 10PM.
| Wave Type | Time (AEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 1AM (Mon 7th Sep) | 5ft (1.6m) 8s |
| Best Surf | 10PM (Thu 10th Sep) | 8ft (2.5m) 10s |
| Most Powerful | 10PM (Wed 9th Sep) | 13ft (4.0m) 9s |
Table - best surf conditions forecast for Thirroul over the next 16 days.
The Lowdown
Alright, Rusty here, let’s break down what’s happening at Thirroul over the next couple of weeks.
Honestly, the start is a bit quiet. Sunday the 6th of September is a no-go – there’s some swell around 6ft from the south, but it’s cross-on and choppy, so don’t bother. You’re looking at about a day’s wait before anything worth paddling for.
Monday the 7th of September morning is where things start looking up. Thirroul will have a clean 5ft swell from the SSE, period around 8 seconds, and a light cross-off wind from the NNW. The combined energy is moderate at 311, so there’s some push but nothing overwhelming. Winds are light, so the surface should be tidy. It’s not the biggest swell, but it’s clean and workable. Crowds can be an issue here sometimes, so just a heads up.
Tuesday the 8th brings a bigger 7ft SSE swell in the morning, but wind is cross from the south, and the period is still short at 8 seconds. Energy is moderate at 584, but the conditions are only marginal with some chop. Rideable if you’re keen, but not the best.
Wednesday the 9th is a mess – 8ft of south swell with fresh cross-onshore winds in the afternoon. Skip it.
Now, for the real standout, you’ve got to look ahead to Sunday the 20th of September in the morning. That’s over a week and a half out, so it’s a long-range promise, but it looks fantastic. There’s a 7ft south swell with an 11-second period, combined energy is moderate-strong at 1060, and the wind is glassy from the WNW. That’s about as clean as it gets. 7ft is solid, so this is for experienced surfers only. Beginners, stay on the sand for this one.
Also keep an eye on Friday the 18th of September in the afternoon. Swell is only 3ft from the SSE, but the period is a very long 19 seconds, and wind is offshore from the west at 12 mph. Combined energy is moderate-strong at 885. That long period will bring nice, lined-up waves, especially on the reef sections. Small but clean and fun.
Other than that, there are a few smaller clean windows, like the morning of the 17th with 3ft S swell and cross-off winds, but nothing that really stands out.
So, best bets: Monday the 7th morning for a clean, manageable session, and that glassy Sunday the 20th of September morning – that one’s the real gem if the forecast holds.
Water temp is about 64°F, which is pretty average for this time of year, nothing to write home about.
Rusty out.
Short Range ForecastSome drizzle, heaviest during Mon night. Warm (max 21°C on Mon morning, min 9°C on Tue night). Winds increasing (light winds from the WNW on Sun night, fresh winds from the S by Wed afternoon). | Days 5-7 Weather SummaryMostly dry. Very mild (max 17°C on Fri morning, min 8°C on Wed night). Winds decreasing (fresh winds from the S on Wed night, light winds from the SSE by Fri morning). | ||||||||||||||||||
Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | ||||||||||||||
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 8 | SSE 8 | SSE 9 | S 9 | SSE 8 | SSE 9 | SSE 9 | S 8 | SSE 7 | S 10 | S 9 | SSE 9 | S 10 | SSE 9 | SSE 9 | SSE 10 | SSE 11 | SSE 10 | SSE 9 |
Wave Graph  | |||||||||||||||||||
 kJ | 349 | 238 | 336 | 1619 | 660 | 572 | 336 | 108 | 710 | 2162 | 1041 | 1097 | 1514 | 705 | 592 | 574 | 622 | 380 | 232 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross-on | cross | cross | on | off | cross | cross-on | cross-off | cross | cross-on | cross-off | cross-on | cross-on | cross-off | cross-on | cross-on | off |
High Tide | 5:00AM1.00m | 4:59PM1.53m | 5:58AM1.09m | 5:56PM1.59m | 6:46AM1.18m | 6:46PM1.62m | 7:28AM1.27m | 7:32PM1.61m | 8:08AM1.35m | 8:15PM1.56m | 8:46AM1.41m | 8:57PM1.46m | |||||||
Low Tide | 10:57PM0.22m | 10:24AM0.42m | 11:54PM0.14m | 11:28AM0.35m | 00:42AM0.07m | 12:24PM0.27m | 1:23AM0.03m | 1:15PM0.21m | 2:01AM0.03m | 2:02PM0.17m | 2:37AM0.06m | 2:48PM0.16m | 3:10AM0.12m | ||||||
 |  |  |  | | | |  | |  | | | | | | | | | | |
 | — | 6:07 | — | — | 6:05 | — | — | 6:05 | — | — | 6:03 | — | — | 6:01 | — | — | 6:01 | — | — |
 | — | — | 5:40 | — | — | 5:42 | — | — | 5:42 | — | — | 5:43 | — | — | 5:44 | — | — | 5:45 | — |
mm | — | — | — | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 14 | 21 | 17 | 14 | 15 | 15 | 11 | 15 | 14 | 13 | 14 | 15 | 12 | 17 | 15 | 11 | 17 | 16 | 12 |
Feels °C | 12 | 19 | 13 | 8 | 12 | 13 | 9 | 10 | 6 | 5 | 8 | 10 | 10 | 15 | 11 | 8 | 15 | 13 | 11 |
Swell 1 Height (m) Direction Period (s) | S 8 | SSE 8 | E 10 | E 10 | E 11 | SSE 9 | SSE 9 | S 8 | ESE 13 | ESE 11 | ESE 10 | ESE 10 | SSE 10 | SSE 9 | SSE 9 | SSE 10 | SSE 11 | SSE 10 | SSE 9 |
| kJ | 349 | 238 | 8 | 9 | 2 | 572 | 336 | 108 | 34 | 70 | 39 | 18 | 1106 | 705 | 592 | 574 | 622 | 380 | 232 |
Swell 2 Height (m) Direction Period (s) | E 10 | SSE 10 | NE 7 | — | — | E 10 | E 10 | SE 7 | ENE 9 | — | SSE 22 | SSE 22 | ESE 9 | E 15 | E 14 | E 13 | SSE 18 | SSE 17 | ENE 13 |
| kJ | 8 | 71 | 2 | — | — | 2 | 2 | 53 | 9 | — | 46 | 95 | 7 | 4 | 4 | 14 | 33 | 55 | 16 |
Swell 3 Height (m) Direction Period (s) | NE 6 | NE 8 | E 10 | — | — | — | N 9 | E 9 | E 17 | — | E 16 | E 16 | S 22 | E 10 | E 10 | E 9 | E 14 | ENE 14 | E 9 |
| kJ | 2 | 2 | 8 | — | — | — | 2 | 2 | 6 | — | 5 | 5 | 9 | 2 | 2 | 2 | 15 | 19 | 2 |
Wind waves Height (m) Direction Period (s) | — | — | SSE 9 | S 9 | SSE 8 | — | NW 2 | SW 2 | SSE 7 | S 10 | S 9 | SSE 9 | S 10 | — | — | — | — | — | NW 2 |
| kJ | — | — | 336 | 1619 | 660 | — | 1 | 1 | 710 | 2162 | 1041 | 1097 | 1514 | — | — | — | — | — | 2 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 130 | 0 | 0 | 175 | 86 | 15 | 98 | 0 | 79 | 468 | 5 | 39 | 39 | 0 | 36 | 118 | 0 | 36 | 40 |
Best forecast wave conditions in Illawarra | |||||||||||||||||||
Best forecast wave conditions in Australia | |||||||||||||||||||
Header Global | |||||||||||||||||||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
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.
Nearest