Surf Forecasts:
Thirroul surf forecast from 4 Sep 2026:
- Best quality surf: Tuesday 8 Sep, 7AM (local time) - 7ft (2.1m), 9s period, SSE swell with cross-offshore winds.
- Most powerful swell: Sunday 6 Sep, 7PM (local time) - 10ft (3.0m), 10s period, S swell with 2,172 kJ wave energy.
- Next surfable swell (1★+): Saturday 5 Sep, 1AM (local time) - 1.5ft (0.5m), 11s 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 Saturday (Sep 05) at 1AM. The primary swell is predicted to be 0.5m and 11s period with a secondary swell of 0.5m and 7s. 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 10s and forecast to arrive on Sunday (Sep 06) at 7PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 5s period and expected on Sunday (Sep 06) at 7AM.
| Wave Type | Time (AEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 1AM (Sat 5th Sep) | 1.5ft (0.5m) 11s |
| Best Surf | 7AM (Tue 8th Sep) | 7ft (2.1m) 9s |
| Most Powerful | 7PM (Sun 6th Sep) | 10ft (3.0m) 10s |
Table - best surf conditions forecast for Thirroul over the next 16 days.
The Lowdown
G’day, Rusty here. Let’s talk about what’s on offer at Thirroul.
Right now and for the first few days, it’s looking pretty average. We’ve got some small swell around, but the wind is all over the shop. Friday kicks it off with a tiny 2ft S swell at 7 seconds – that’s weak energy (73) and poor surf, so don’t get too excited. Saturday cleans up a bit in the morning with a 2ft S swell at 9 seconds and a cross-off wind, but it’s still ordinary. The real problem is that the swell’s barely there.
Come Sunday afternoon the 6th, the energy jumps to 844 with a 6ft S swell at 9 seconds, but it’s cross-on and choppy – messy as hell. Not worth paddling out for a surf. That’s a consistent theme for a few days: the swell gets bigger, but the wind ruins it.
Now, Monday morning the 7th is where it gets interesting. There’s a 5ft SSE swell at 9 seconds, moderate wave energy at 316, and the wind is glassy – dead calm, just like glass. That’s the standout. Expect clean, fun waves, and with that moderate energy, you’ll get some good shape. It’s a fairly consistent spot, so you’ve got a decent chance.
Monday afternoon goes south quick with a cross-on SE wind and messy conditions. Tuesday the 8th sees a bigger 7ft SSE swell at 10 seconds, strong energy at 945, but the wind is cross-on. It’s marginal – good for experts only, as that size is pushing 8ft. Crowds are possible here sometimes.
The rest of the week gets choppy again, with a huge spike on Thursday morning the 10th – 8ft S swell at 9 seconds, very strong energy at 2139, but cross-on rain showers kill it. That’s a kite-surfing day, not a paddle day.
Monday morning the 14th offers another decent window: 6ft SSE swell at 7 seconds, moderate energy at 404, with cross-off N winds – clean and surfable. Same for Wednesday the 16th? Nah, that’s small and choppy again.
The last good chance is Monday morning the 14th, but after that, it’s small and weak with poor conditions. The 16-day window has a lot of dead days – gaps of three or four days where it’s not worth it.
Best bet: Monday morning the 7th – glassy, clean, and that 5ft SSE swell will be fun on the beach-and-reef setup. Get in early before the crowds roll in.
Rusty.
Short Range ForecastMostly dry. Warm (max 29°C on Sat morning, min 12°C on Sun night). Winds decreasing (fresh winds from the W on Sat night, calm by Mon morning). | Days 5-7 Weather SummaryLight rain (total 6mm), mostly falling on Wed afternoon. Warm (max 20°C on Wed morning, min 9°C on Wed night). Mainly strong winds. | |||||||||||||||||||
Fri 4 | Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | ||||||||||||||
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 7 | S 11 | S 9 | S 10 | NE 7 | NE 7 | S 9 | S 9 | SSE 9 | SSE 8 | SSE 9 | SSE 10 | SSE 10 | SSE 10 | SSE 9 | SSE 9 | SSE 9 | S 9 | S 9 | SSE 10 |
Wave Graph  | ||||||||||||||||||||
 kJ | 54 | 57 | 58 | 44 | 44 | 25 | 551 | 664 | 311 | 268 | 1535 | 916 | 971 | 461 | 274 | 559 | 1713 | 1185 | 984 | 850 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross-off | cross-off | off | cross-off | cross-off | cross-on | cross-off | glassy | cross-on | cross | cross-on | cross-on | cross-off | cross-off | cross-on | cross | cross-on | cross-on | cross |
High Tide | 2:19AM0.94m | 2:40PM1.42m | 3:46AM0.95m | 3:54PM1.47m | 5:00AM1.00m | 4:59PM1.53m | 5:58AM1.09m | 5:56PM1.59m | 6:46AM1.18m | 6:46PM1.62m | 7:28AM1.27m | 7:32PM1.61m | ||||||||
Low Tide | 8:25PM0.34m | 7:50AM0.45m | 9:47PM0.30m | 9:09AM0.46m | 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 | |||||||
 |  |  | |  | | | | | | | | | | |  |  | | | | |
 | — | — | 6:09 | — | — | 6:09 | — | — | 6:07 | — | — | 6:05 | — | — | 6:05 | — | — | 6:03 | — | — |
 | 5:38 | — | — | 5:39 | — | — | 5:39 | — | — | 5:40 | — | — | 5:42 | — | — | 5:42 | — | — | 5:43 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 3 | 1 | 2 | 1 | — |
Temp °C | 20 | 16 | 29 | 28 | 19 | 21 | 19 | 15 | 19 | 17 | 14 | 16 | 15 | 11 | 20 | 16 | 12 | 14 | 14 | 13 |
Feels °C | 18 | 14 | 25 | 23 | 15 | 16 | 15 | 13 | 16 | 14 | 7 | 13 | 12 | 9 | 18 | 11 | 6 | 8 | 8 | 8 |
Swell 1 Height (m) Direction Period (s) | S 7 | S 7 | S 9 | ENE 6 | NE 7 | NE 7 | S 9 | S 9 | SSE 9 | SE 11 | E 10 | SSE 10 | SSE 10 | SSE 10 | SSE 9 | E 9 | S 16 | S 9 | SSE 9 | SSE 10 |
| kJ | 54 | 25 | 58 | 40 | 44 | 25 | 276 | 664 | 311 | 20 | 9 | 916 | 971 | 461 | 274 | 2 | 45 | 848 | 736 | 850 |
Swell 2 Height (m) Direction Period (s) | NE 8 | S 11 | E 9 | S 10 | S 9 | S 8 | NE 7 | E 10 | E 10 | E 10 | — | SE 10 | SE 9 | E 10 | NNE 4 | S 16 | E 16 | SSE 23 | SSE 23 | SSE 23 |
| kJ | 9 | 57 | 7 | 44 | 28 | 18 | 8 | 8 | 2 | 2 | — | 25 | 3 | 2 | 1 | 5 | 5 | 101 | 176 | 102 |
Swell 3 Height (m) Direction Period (s) | ENE 10 | E 4 | — | E 9 | E 11 | E 11 | E 11 | NE 6 | NE 8 | NE 8 | — | NE 10 | E 10 | NE 9 | E 10 | E 16 | — | E 16 | E 16 | E 15 |
| kJ | 9 | 3 | — | 7 | 2 | 2 | 9 | 2 | 3 | 2 | — | 4 | 2 | 3 | 2 | 5 | — | 5 | 5 | 4 |
Wind waves Height (m) Direction Period (s) | ENE 2 | — | NNE 6 | WNW 3 | WSW 4 | SW 6 | S 9 | — | — | SSE 8 | SSE 9 | — | — | N 3 | WNW 3 | SSE 9 | SSE 9 | S 9 | S 9 | — |
| kJ | 1 | — | 6 | 3 | 13 | 29 | 551 | — | — | 268 | 1535 | — | — | 2 | 1 | 559 | 1713 | 1185 | 984 | — |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 33 | 0 | 0 | 0 | 74 | 5 | 726 | 0 | 0 | 48 | 86 | 5 | 40 | 0 | 0 | 245 | 118 | 86 | 316 | 17 |
Best forecast wave conditions in Illawarra | ||||||||||||||||||||
Best forecast wave conditions in Australia | ||||||||||||||||||||
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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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