Surf Forecasts:
Thirroul surf forecast from 8 Aug 2026:
- Best quality surf: Thursday 13 Aug, 7PM (local time) - 5.5ft (1.7m), 10s period, S swell with cross-offshore winds.
- Most powerful swell: Thursday 13 Aug, 4PM (local time) - 7ft (2.2m), 10s period, S swell with 893 kJ wave energy.
- Next surfable swell (1★+): Sunday 9 Aug, 10AM (local time) - 2.5ft (0.7m), 8s period with ENE 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 Sunday (Aug 09) at 10AM. The primary swell is predicted to be 0.7m and 8s period with a secondary swell of 0.4m and 10s. Another secondary swell of 0.4m and 3s is also forecast. 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 2.2m 10s and forecast to arrive on Thursday (Aug 13) at 4PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.3m 6s period and expected on Monday (Aug 10) at 7AM.
| Wave Type | Time (AEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 10AM (Sun 9th Aug) | 2.5ft (0.7m) 8s |
| Best Surf | 7PM (Thu 13th Aug) | 5.5ft (1.7m) 10s |
| Most Powerful | 4PM (Thu 13th Aug) | 7ft (2.2m) 10s |
Table - best surf conditions forecast for Thirroul over the next 16 days.
The Lowdown
G’day, Rusty here. Let’s talk about what Thirroul’s got cooking. The first few days are a bit of a write-off – you’ll be waiting for something worthwhile. There’s a real dry spell of weak, choppy surf until midweek. The best stuff is further out, around the second weekend, so don’t write it off yet.
Your first proper look-in is Wednesday the 12th, morning. Light offshore WNW breeze at 10 km/h, and a clean 3ft swell out of the S with an 11-second period. The combined energy sits at 232 – moderate, but the glassy conditions will have the lines looking nice. Water temp is 17.8°, which is spot on for the season.
Thursday the 13th morning is another solid shout. You’ve got 4ft S swell with a short 8-second period, but the cross-off SW wind at 15 km/h keeps the surface clean. Energy is moderate (239). It’s a good chance to get a few waves before the wind turns ugly later.
The real standout is Saturday the 22nd, especially the morning. Clean as a whistle with a light cross-off WSW breeze at 10 km/h, and a 5.6ft ENE swell with a 10-second period. Combined energy is a moderate 564. That’s got some grunt and shape, and the wind’s doing you a solid. It’s a bit much for beginners, but intermediate and above will love it. Saturday afternoon is just as good with 5.2ft and a gentle offshore. That whole weekend is your best bet.
After that, Monday the 24th brings onshore junk and messy conditions. So lock in that Saturday window. Thirroul is a beach and reef spot, fairly consistent, and it can get crowded sometimes – so paddle out early.
Short Range ForecastLight rain (total 5mm), mostly falling on Sun night. Very mild (max 18°C on Tue morning, min 9°C on Tue night). Winds decreasing (fresh winds from the WNW on Mon night, light winds from the WNW by Tue night). | Days 4-6 Weather SummarySome drizzle, heaviest during Fri night. Very mild (max 19°C on Wed morning, min 7°C on Thu night). Wind will be generally light. | ||||||||||||||||||||
Sunday 9 | Monday 10 | Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | |||||||||||||||
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) | ENE 8 | ENE 9 | NE 6 | ENE 9 | ENE 10 | NE 10 | ENE 10 | S 12 | ENE 9 | S 11 | S 10 | S 8 | S 8 | S 10 | S 8 | S 9 | S 8 | SSE 8 | S 7 | S 7 | SSE 6 |
Wave Graph  | |||||||||||||||||||||
 kJ | 65 | 121 | 194 | 588 | 490 | 181 | 81 | 268 | 65 | 185 | 121 | 50 | 205 | 893 | 223 | 281 | 165 | 85 | 100 | 107 | 113 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross | cross-off | off | off | cross-off | cross-off | off | off | off | cross-off | cross-off | cross-on | off | cross-off | on | cross-off | cross | cross | cross-on |
High Tide | 5:10PM1.58m | 6:05AM1.04m | 6:08PM1.67m | 7:01AM1.10m | 7:01PM1.73m | 7:50AM1.17m | 7:50PM1.75m | 8:36AM1.23m | 8:37PM1.72m | 9:19AM1.29m | 9:21PM1.63m | 10:01AM1.32m | 10:04PM1.51m | ||||||||
Low Tide | 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 | 2:14PM0.20m | 3:15AM-0.02m | 3:03PM0.20m | 3:53AM0.03m | 3:52PM0.23m | ||||||||
 |  |  |  |  |  |  | | | | | | | | | | | | | | | |
 | 6:43 | — | — | 6:41 | — | — | 6:41 | — | — | 6:39 | — | — | 6:39 | — | — | 6:37 | — | — | 6:35 | — | — |
 | — | 5:21 | — | — | 5:21 | — | — | 5:22 | — | — | 5:22 | — | — | 5:22 | — | — | 5:23 | — | — | 5:24 | — |
mm | — | 1 | 3 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | — | 1 | 5 |
Temp °C | 17 | 17 | 15 | 16 | 15 | 15 | 18 | 16 | 11 | 19 | 17 | 12 | 16 | 15 | 10 | 17 | 15 | 12 | 16 | 15 | 14 |
Feels °C | 13 | 13 | 11 | 8 | 9 | 8 | 12 | 10 | 8 | 15 | 12 | 6 | 11 | 11 | 6 | 14 | 12 | 10 | 11 | 10 | 10 |
Swell 1 Height (m) Direction Period (s) | ENE 8 | ENE 9 | ENE 9 | ENE 9 | ENE 10 | NE 10 | ENE 10 | S 12 | S 8 | S 11 | S 10 | S 8 | S 8 | S 9 | S 8 | S 9 | S 8 | SSE 8 | S 7 | ENE 10 | SSE 6 |
| kJ | 65 | 121 | 80 | 588 | 490 | 181 | 81 | 268 | 47 | 185 | 121 | 50 | 205 | 568 | 223 | 281 | 165 | 85 | 100 | 18 | 113 |
Swell 2 Height (m) Direction Period (s) | NE 10 | SSE 8 | E 14 | S 13 | S 13 | E 13 | — | ENE 9 | ENE 9 | ENE 9 | ENE 10 | ENE 9 | ENE 9 | ENE 9 | ENE 9 | ENE 10 | ENE 10 | ENE 10 | ENE 10 | SE 15 | ENE 10 |
| kJ | 27 | 6 | 16 | 3 | 3 | 3 | — | 76 | 65 | 47 | 52 | 49 | 34 | 29 | 17 | 18 | 18 | 18 | 18 | 9 | 18 |
Swell 3 Height (m) Direction Period (s) | SSE 8 | E 14 | SE 9 | — | — | — | S 12 | NNE 8 | S 12 | — | NNE 3 | — | — | — | SSE 15 | S 14 | — | S 19 | SSE 19 | S 14 | — |
| kJ | 6 | 4 | 3 | — | — | — | 3 | 13 | 41 | — | 1 | — | — | — | 22 | 34 | — | 7 | 34 | 4 | — |
Wind waves Height (m) Direction Period (s) | NNE 3 | NE 5 | NE 6 | NNW 4 | NW 4 | WSW 4 | SW 6 | — | WNW 3 | NNW 3 | WSW 3 | WSW 3 | W 3 | S 10 | W 2 | — | — | — | — | S 7 | — |
| kJ | 4 | 15 | 194 | 13 | 39 | 24 | 25 | — | 4 | 4 | 2 | 9 | 2 | 893 | 1 | — | — | — | — | 107 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 2 | 468 | 40 | 52 | 109 | 2 | 2 | 0 | 0 | 0 | 2 | 0 | 5 | 0 | 0 | 40 | 0 | 2 | 79 | 118 |
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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