Surf Forecasts:
Thirroul surf forecast from 13 Aug 2026:
- Best quality surf: Saturday 15 Aug, 1AM (local time) - 4ft (1.2m), 9s period, S swell with glassy winds.
- Most powerful swell: Saturday 15 Aug, 1PM (local time) - 5ft (1.6m), 7s period, S swell with 269 kJ wave energy.
- Next surfable swell (1★+): Friday 14 Aug, 7AM (local time) - 3.5ft (1.1m), 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 Friday (Aug 14) at 7AM. The primary swell is predicted to be 1.1m and 8s period with a secondary swell of 0.3m and 9s. 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 1.6m 7s and forecast to arrive on Saturday (Aug 15) at 1PM. 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 Friday (Aug 21) at 7AM.
| Wave Type | Time (AEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 7AM (Fri 14th Aug) | 3.5ft (1.1m) 8s |
| Best Surf | 1AM (Sat 15th Aug) | 4ft (1.2m) 9s |
| Most Powerful | 1PM (Sat 15th Aug) | 5ft (1.6m) 7s |
Table - best surf conditions forecast for Thirroul over the next 16 days.
The Lowdown
G’day, I’m Rusty. Let’s break down what’s happening at Thirroul over this sixteen-day stretch. It starts slow, but there are a couple of gems later on that are worth waiting for.
Right now, Thursday the 13th is a bit of a dud – a weak 4ft south swell with moderate wave energy (303) and onshore wind. Not much to get excited about. Water temp is 64°, right around average for this time of year.
Friday morning the 14th gives us a brief chance: 4ft south swell, 8-second period, glassy conditions, but weak energy (192). It’s surfable but ordinary. After that, we hit a long dry spell. From Friday afternoon right through to the 21st, it’s mostly poor conditions – small waves from 2ft to 4ft, messy winds, and weak energy. A few glassy mornings like the 19th pop up, but the waves are just too ordinary to bother.
The first real standout is Saturday the 22nd afternoon. We’ve got a 4ft north-east swell with an 8-second period, clean offshore wind, and moderate energy (301). That NE swell matches up nicely with the spot’s optimal SE direction, and the offshore breeze will put a nice face on the waves. Crowds are possible here, so expect a few others out.
Sunday the 23rd is poor again – small, cross-off winds, not worth it.
Then Monday the 24th morning is the big one. A 5ft south swell with a 10-second period – that’s groundswell – clean conditions, and energy at 532 (moderate to strong). This is a proper wave with good shape. It’s a bit much for beginners over 5ft, but intermediates will be in heaven.
Tuesday the 25th morning still offers a solid 4ft SSW swell with moderate offshore wind and clean conditions.
After that, we hit small days again through the 26th.
But brace yourself. Thursday the 27th morning brings a 7ft south swell – that’s expert territory – with strong energy (1081) and clean wind. Friday the 28th morning tops out at 8ft, energy at 1472, still clean. The absolute stand-out is Friday the 28th afternoon: 7ft south swell, 10-second period, glassy conditions, and massive energy at 1549. If you’re experienced, that’s the session of the run – powerful, clean, and lined up.
To sum it up: the first week is mostly flat and messy. The best bets are Saturday the 22nd afternoon for a clean fun session, and the standout stretch from Monday the 24th morning through Friday the 28th afternoon – especially the 24th morning and that 28th afternoon. The late-week call is a bit far out, so keep an eye on it, but it looks like a beauty.
Rusty.
Short Range ForecastModerate rain (total 10mm), heaviest on Sat night. Very mild (max 16°C on Fri morning, min 11°C on Sat night). Wind will be generally light. | Days 4-6 Weather SummaryModerate rain (total 15mm), heaviest on Mon morning. Very mild (max 17°C on Tue morning, min 11°C on Wed night). Wind will be generally light. | ||||||||||||||||||||
Friday 14 | Saturday 15 | Sunday 16 | Monday 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | |||||||||||||||
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 8 | SSE 7 | S 9 | S 7 | S 7 | S 6 | SE 7 | SE 6 | S 10 | S 9 | S 9 | ESE 6 | S 11 | S 11 | ESE 7 | ESE 6 | ESE 6 | ESE 6 | ESE 7 | ESE 7 | E 6 |
Wave Graph | |||||||||||||||||||||
145 | 86 | 225 | 238 | 231 | 84 | 183 | 136 | 158 | 90 | 56 | 107 | 56 | 35 | 68 | 113 | 78 | 96 | 79 | 62 | 61 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | cross-on | glassy | cross | cross-on | cross | cross-on | on | cross-on | on | on | glassy | glassy | on | glassy | glassy | cross-on | off | cross-off | cross | cross-off |
High Tide | 9:21PM1.63m | 10:01AM1.32m | 10:04PM1.51m | 10:42AM1.34m | 10:47PM1.35m | 11:24AM1.34m | 11:31PM1.20m | 12:07PM1.32m | 00:18AM1.05m | 12:56PM1.29m | 1:14AM0.93m | 1:51PM1.26m | 2:26AM0.86m | ||||||||
Low Tide | 3:03PM0.20m | 3:53AM0.03m | 3:52PM0.23m | 4:29AM0.10m | 4:42PM0.28m | 5:04AM0.20m | 5:34PM0.35m | 5:39AM0.29m | 6:30PM0.42m | 6:15AM0.39m | 7:35PM0.47m | 6:58AM0.47m | 8:49PM0.50m | ||||||||
6:37 | — | — | 6:35 | — | — | 6:35 | — | — | 6:33 | — | — | 6:33 | — | — | 6:31 | — | — | 6:31 | — | — | |
— | 5:23 | — | — | 5:24 | — | — | 5:25 | — | — | 5:25 | — | — | 5:27 | — | — | 5:28 | — | — | 5:28 | — | |
mm | — | — | 2 | 2 | — | 3 | 2 | — | 1 | 3 | 4 | 3 | 1 | — | 2 | 2 | — | — | — | — | — |
Temp °C | 16 | 16 | 14 | 14 | 15 | 14 | 16 | 16 | 15 | 14 | 14 | 14 | 17 | 16 | 14 | 16 | 15 | 14 | 19 | 17 | 13 |
Feels °C | 13 | 13 | 14 | 11 | 10 | 11 | 11 | 12 | 12 | 12 | 11 | 12 | 14 | 13 | 13 | 15 | 14 | 13 | 16 | 13 | 11 |
Swell 1 Height (m) Direction Period (s) | S 8 | SSE 7 | SSE 9 | ENE 9 | SSE 18 | S 6 | SSE 18 | S 11 | ESE 6 | S 9 | E 6 | S 8 | SE 6 | SE 6 | ESE 7 | ESE 6 | ESE 6 | ESE 6 | ESE 7 | ESE 7 | E 6 |
145 | 86 | 135 | 17 | 65 | 84 | 61 | 86 | 72 | 87 | 50 | 32 | 47 | 32 | 68 | 113 | 78 | 96 | 79 | 62 | 61 | |
Swell 2 Height (m) Direction Period (s) | ENE 10 | ENE 10 | ENE 9 | SSE 19 | ENE 9 | S 9 | ENE 10 | ENE 10 | S 10 | SSW 14 | S 9 | ENE 10 | E 6 | E 6 | S 10 | ESE 10 | ESE 9 | — | — | NE 9 | NE 9 |
18 | 18 | 17 | 37 | 17 | 27 | 9 | 10 | 158 | 36 | 56 | 10 | 26 | 24 | 29 | 18 | 26 | — | — | 3 | 3 | |
Swell 3 Height (m) Direction Period (s) | SSE 17 | SSE 16 | SE 9 | SE 8 | E 8 | SSE 18 | ENE 10 | SSE 18 | SSE 17 | ENE 10 | SE 7 | ESE 10 | S 11 | S 11 | ESE 11 | S 9 | S 9 | S 14 | — | — | — |
29 | 24 | 3 | 3 | 1 | 61 | 20 | 31 | 29 | 10 | 38 | 11 | 56 | 35 | 24 | 14 | 6 | 4 | — | — | — | |
Wind waves Height (m) Direction Period (s) | — | — | S 9 | S 7 | S 7 | — | SE 7 | SE 6 | — | ESE 6 | — | ESE 6 | — | — | — | — | — | — | — | ENE 4 | NNW 2 |
— | — | 225 | 238 | 231 | — | 183 | 136 | — | 90 | — | 107 | — | — | — | — | — | — | — | 8 | 1 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 40 | 0 | 38 | 48 | 5 | 39 | 48 | 5 | 48 | 98 | 0 | 0 | 128 | 0 | 0 | 6 | 0 | 0 | 247 | 0 |
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)
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.











