Surf Forecasts:
Thirroul surf forecast from 6 Aug 2026:
- Best quality surf: Monday 10 Aug, 1AM (local time) - 10ft (3.0m), 8s period, NE swell with offshore winds.
- Most powerful swell: Thursday 13 Aug, 1PM (local time) - 11ft (3.5m), 11s period, SSW swell with 2,454 kJ wave energy.
- Next surfable swell (1★+): Friday 7 Aug, 1AM (local time) - 1.5ft (0.4m), 10s period with SSE 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 07) at 1AM. The primary swell is predicted to be 0.4m and 10s period with a secondary swell of 0.5m and 7s. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Thirroul in the next 16 days are 3.5m 11s and forecast to arrive on Thursday (Aug 13) 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 1.7m 5s period and expected on Thursday (Aug 13) at 1AM.
| Wave Type | Time (AEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 1AM (Fri 7th Aug) | 1.5ft (0.4m) 10s |
| Best Surf | 1AM (Mon 10th Aug) | 10ft (3.0m) 8s |
| Most Powerful | 1PM (Thu 13th Aug) | 11ft (3.5m) 11s |
Table - best surf conditions forecast for Thirroul over the next 16 days.
The Lowdown
Righto, surf’s looking pretty quiet for a while around Thirroul – a bit of a slow start, so hang tight. Things kick off proper on Thursday the 6th, but the swell’s tiny, just 3ft from the south, with a light cross-onshore breeze. It’s a bit messy, not really worth getting wet for.
Friday the 7th morning shapes up a little better. That early window has a clean, cross-off wind from the west, and the swell drops to 2ft from the SSE. It’s small, but you’ll find a few surfable waves if you’re keen.
Saturday the 8th looks promising for a dawny. The wind goes glassy, nothing but a slight air, and the swell holds at 2ft from the south. The combined energy’s pretty weak (91), but it’ll be clean and knee-high, perfect for a longboard or a cruise.
Sunday the 9th morning gives you a clean cross-off breeze again, with the swell picking up to 3ft from the ENE. Still small, but the conditions are tidy.
Now, Monday the 10th morning – this is where it starts to get interesting. A moderate offshore wind from the WNW, swell up to 4ft from the ENE, and the energy bumps to 285. It’s clean, but still on the smaller side for the beach-and-reef setup.
The real standout hits Thursday the 13th afternoon. The swell jumps to 16ft from the south, period a solid 11 seconds, and the combined energy is massive (9019). That’s a big, powerful groundswell. The wind is cross-off from the WSW, so it’ll be clean. But at 16ft, this is only for experts – it’ll be too big for most. The break is exposed to the south swell, so expect heavy sets. This is the best on offer, but it’s a serious session.
Friday the 14th morning is still pumping, with 10ft from the SSE and a light cross-off breeze. Excellent conditions for experienced surfers, but again, over 8ft, so it’s expert territory.
After that, the swell drops and the wind gets messy. Through the second week, from the 16th onward, it’s mostly cross-shore winds and smaller, poor-quality surf. Not much to write home about—just small, choppy conditions with the occasional clean morning around the 20th and 21st, but the swell is tiny (2ft) and the energy is weak.
Water temp is around 64°, about average for the time of year, so no wetsuit drama for the locals.
Rusty
Short Range ForecastSome drizzle, heaviest during Sun afternoon. Very mild (max 17°C on Sun morning, min 7°C on Thu night). Winds increasing (calm on Sat morning, fresh winds from the N by Sun afternoon). | Days 5-7 Weather SummaryLight rain (total 2mm), mostly falling on Sun night. Very mild (max 18°C on Tue afternoon, min 8°C on Tue night). Winds decreasing (fresh winds from the N on Sun night, light winds from the NW by Tue night). | ||||||||||||||||||
Friday 7 | Saturday 8 | Sunday 9 | Monday 10 | Tuesday 11 | Wednesday 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) | SSE 10 | SSE 10 | SSE 9 | S 8 | S 8 | E 8 | E 8 | ENE 8 | ENE 9 | NE 8 | ENE 9 | ENE 9 | ENE 9 | S 11 | S 11 | S 10 | S 11 | S 10 | ENE 9 |
Wave Graph  | |||||||||||||||||||
 kJ | 38 | 54 | 56 | 33 | 42 | 34 | 48 | 87 | 176 | 936 | 307 | 148 | 75 | 64 | 59 | 96 | 110 | 65 | 32 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | cross-off | cross-on | off | glassy | cross-on | cross-off | cross-off | cross | off | off | off | off | off | off | cross-off | cross-off | off | cross-off |
High Tide | 2:15AM1.00m | 2:58PM1.41m | 3:39AM0.97m | 4:05PM1.49m | 4:58AM0.98m | 5:10PM1.58m | 6:05AM1.04m | 6:08PM1.67m | 7:01AM1.10m | 7:01PM1.73m | 7:50AM1.17m | 7:50PM1.75m | |||||||
Low Tide | 8:07AM0.36m | 9:51PM0.34m | 9:16AM0.39m | 11:05PM0.25m | 10:26AM0.38m | 00:08AM0.14m | 11:31AM0.33m | 1:02AM0.05m | 12:29PM0.28m | 1:50AM-0.01m | 1:23PM0.23m | 2:34AM-0.04m | |||||||
 |  | | | | |  |  |  |  |  | | | | | | | | | |
 | — | 6:45 | — | — | 6:43 | — | — | 6:43 | — | — | 6:41 | — | — | 6:41 | — | — | 6:39 | — | — |
 | — | — | 5:19 | — | — | 5:20 | — | — | 5:21 | — | — | 5:21 | — | — | 5:22 | — | — | 5:22 | — |
mm | — | — | — | — | — | — | — | — | 1 | 1 | — | — | — | — | — | — | 1 | — | — |
Temp °C | 10 | 16 | 14 | 10 | 16 | 16 | 11 | 17 | 16 | 15 | 14 | 14 | 13 | 17 | 18 | 10 | 15 | 13 | 12 |
Feels °C | 7 | 12 | 10 | 8 | 12 | 11 | 9 | 13 | 10 | 9 | 7 | 8 | 7 | 11 | 13 | 6 | 10 | 7 | 5 |
Swell 1 Height (m) Direction Period (s) | S 7 | SSE 10 | SSE 9 | S 8 | S 8 | E 8 | E 8 | ENE 8 | ENE 9 | NE 8 | ENE 9 | ENE 9 | ENE 9 | S 11 | S 11 | S 10 | S 11 | S 10 | ENE 9 |
| kJ | 26 | 54 | 56 | 33 | 42 | 34 | 48 | 87 | 176 | 547 | 307 | 148 | 75 | 64 | 59 | 96 | 110 | 65 | 32 |
Swell 2 Height (m) Direction Period (s) | SSE 10 | S 9 | S 8 | SSE 9 | SSE 9 | S 7 | NE 4 | SSE 8 | SSE 8 | E 14 | S 13 | S 13 | SSW 6 | ENE 9 | ENE 10 | ENE 10 | ENE 10 | NE 7 | S 8 |
| kJ | 38 | 36 | 21 | 33 | 31 | 16 | 6 | 6 | 6 | 4 | 3 | 3 | 3 | 35 | 38 | 33 | 33 | 30 | 6 |
Swell 3 Height (m) Direction Period (s) | S 9 | E 9 | ENE 9 | ENE 7 | ENE 7 | SE 9 | SSE 8 | S 6 | E 14 | S 9 | — | — | E 13 | S 6 | S 8 | — | — | ENE 10 | S 13 |
| kJ | 14 | 6 | 16 | 18 | 16 | 19 | 13 | 3 | 4 | 2 | — | — | 4 | 3 | 21 | — | — | 31 | 3 |
Wind waves Height (m) Direction Period (s) | — | W 3 | SSE 2 | — | — | ENE 2 | NNW 2 | NNW 2 | NE 5 | NE 8 | WNW 4 | WNW 4 | W 4 | W 2 | W 3 | NW 3 | N 6 | W 5 | WSW 5 |
| kJ | — | 1 | 1 | — | — | 1 | 1 | 1 | 74 | 936 | 21 | 16 | 14 | 1 | 1 | 2 | 64 | 81 | 143 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 0 | 0 | 39 | 0 | 0 | 201 | 0 | 0 | 2 | 0 | 112 | 0 | 0 | 0 | 0 | 0 | 6 | 0 | 89 |
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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