Surf Forecasts:
Thirroul surf forecast from 2 Aug 2026:
- Best quality surf: Monday 3 Aug, 1AM (local time) - 3.5ft (1.1m), 11s period, SE swell with offshore winds.
- Most powerful swell: Thursday 6 Aug, 1PM (local time) - 5ft (1.5m), 10s period, S swell with 405 kJ wave energy.
- Next surfable swell (1★+): Monday 3 Aug, 1AM (local time) - 3.5ft (1.1m), 11s period with SE 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 (Aug 03) at 1AM. The primary swell is predicted to be 1.1m and 11s period with a secondary swell of 0.5m and 5s. Another secondary swell of 0.9m and 5s is also forecast. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Thirroul in the next 16 days are 1.5m 10s and forecast to arrive on Thursday (Aug 06) at 1PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 4s period and expected on Tuesday (Aug 04) at 10PM.
| Wave Type | Time (AEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 1AM (Mon 3rd Aug) | 3.5ft (1.1m) 11s |
| Best Surf | 1AM (Mon 3rd Aug) | 3.5ft (1.1m) 11s |
| Most Powerful | 1PM (Thu 6th Aug) | 5ft (1.5m) 10s |
Table - best surf conditions forecast for Thirroul over the next 16 days.
The Lowdown
Alright, Rusty here, and I’ve got the scoop on what’s coming our way at Thirroul. It’s a beach and reef set-up that takes a south-east swell best, and right now, the water’s sitting around 64°, which is spot on average for this time of year, so no surprises there.
We’re looking at a bit of a slow start. The first real action worth paddling out for doesn’t fire up until Thursday, the 6th of August. The morning’s the pick with a clean 4ft S swell, light offshore winds, and moderate wave energy humming at 266. That’s a solid, clean window for an intermediate surfer to get a few. Thursday afternoon, the wind swings and it’s not worth it.
Then Friday the 7th, the morning is glassy – an absolute treat, with 4ft of S swell and 205 in energy. That’s the kind of session where you lose track of time. The period’s around 9 seconds, so it’s a fun, workable groundswell, not too tricky out the back. The afternoon gets a cross-on breeze and turns ordinary.
After that, it’s a dry spell. Saturday the 8th and Sunday the 9th are small and messy, and the following week is a real write-off – tiny swell, windy, or just poor conditions. There’s a big gap from the 8th through to the end of the second week before we see anything promising again.
Now, if you’re patient, the real standout is Monday the 17th of August. The morning is absolutely glassy – calm, no wind, and 4ft of S swell with a long 12-second period, pumping out 629 in energy. That’s a long-period groundswell, and at a beach and reef break like Thirroul, it’ll hold up well, offering some nice-shaped lines. That’s the session to circle on the calendar, though it’s a fair way out, so keep an eye on the forecast.
Overall, Thursday and Friday mornings and that Monday morning a week and a half away are your tickets. The rest is a waiting game.
Rusty.
Short Range ForecastMostly dry. Warm (max 22°C on Mon morning, min 8°C on Mon night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Very mild (max 17°C on Thu morning, min 7°C on Wed night). Wind will be generally light. | |||||||||||||||||||
Sun 2 | Monday 3 | Tuesday 4 | Wednesday 5 | Thursday 6 | Friday 7 | Saturday 8 | ||||||||||||||
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) | SE 12 | SE 11 | SE 10 | SE 10 | SE 10 | SSE 10 | SSE 10 | S 6 | S 8 | S 7 | S 8 | S 9 | S 9 | S 9 | S 9 | S 9 | S 8 | S 8 | S 8 | S 7 |
Wave Graph  | ||||||||||||||||||||
 kJ | 561 | 314 | 184 | 104 | 69 | 10 | 10 | 21 | 66 | 43 | 105 | 257 | 388 | 235 | 194 | 162 | 66 | 41 | 58 | 26 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | off | cross-off | off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | off | off | cross-on | cross-off | glassy | cross-on | glassy | glassy | cross | cross-off |
High Tide | 10:31PM1.41m | 11:18AM1.25m | 11:13PM1.31m | 12:03PM1.29m | 00:01AM1.20m | 12:53PM1.32m | 1:01AM1.09m | 1:52PM1.36m | 2:15AM1.00m | 2:58PM1.41m | 3:39AM0.97m | 4:05PM1.49m | ||||||||
Low Tide | 4:22PM0.36m | 5:02AM0.16m | 5:11PM0.39m | 5:38AM0.20m | 6:07PM0.41m | 6:19AM0.25m | 7:13PM0.42m | 7:08AM0.31m | 8:30PM0.40m | 8:07AM0.36m | 9:51PM0.34m | 9:16AM0.39m | 11:05PM0.25m | |||||||
 |  |  | |  | | | | | | | | | | | | | | | | |
 | — | — | 6:48 | — | — | 6:47 | — | — | 6:46 | — | — | 6:46 | — | — | 6:45 | — | — | 6:43 | — | — |
 | 5:15 | — | — | 5:15 | — | — | 5:16 | — | — | 5:17 | — | — | 5:17 | — | — | 5:19 | — | — | 5:20 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 17 | 13 | 22 | 22 | 13 | 17 | 17 | 11 | 17 | 16 | 10 | 17 | 16 | 11 | 15 | 15 | 14 | 17 | 17 | 13 |
Feels °C | 13 | 10 | 18 | 18 | 9 | 11 | 11 | 5 | 11 | 11 | 6 | 14 | 12 | 8 | 12 | 12 | 13 | 14 | 13 | 11 |
Swell 1 Height (m) Direction Period (s) | SE 12 | SE 11 | SE 10 | SE 10 | SE 10 | SSE 10 | SSE 10 | S 6 | S 8 | S 7 | S 8 | S 9 | S 9 | S 9 | S 9 | S 9 | S 8 | S 8 | S 8 | ENE 5 |
| kJ | 561 | 314 | 184 | 104 | 69 | 10 | 10 | 21 | 66 | 43 | 105 | 257 | 388 | 235 | 194 | 162 | 66 | 41 | 58 | 18 |
Swell 2 Height (m) Direction Period (s) | E 17 | NE 5 | E 16 | NE 5 | NE 5 | ESE 7 | S 5 | E 8 | E 10 | E 9 | E 8 | E 9 | E 12 | ENE 9 | ENE 7 | ENE 6 | SE 9 | SSE 9 | ENE 8 | S 7 |
| kJ | 6 | 11 | 5 | 8 | 7 | 5 | 2 | 5 | 18 | 15 | 6 | 6 | 26 | 15 | 5 | 4 | 22 | 31 | 22 | 26 |
Swell 3 Height (m) Direction Period (s) | S 21 | E 16 | NE 8 | E 16 | SSW 3 | NE 5 | ESE 7 | SE 11 | E 13 | E 13 | E 12 | E 12 | NE 8 | E 16 | E 9 | E 9 | ENE 8 | ENE 7 | E 16 | E 7 |
| kJ | 9 | 5 | 2 | 5 | 1 | 1 | 5 | 5 | 14 | 3 | 11 | 3 | 2 | 5 | 6 | 2 | 13 | 10 | 5 | 10 |
Wind waves Height (m) Direction Period (s) | NE 4 | NNE 5 | N 5 | NE 5 | W 3 | W 3 | WSW 3 | W 4 | WSW 3 | — | W 3 | — | — | — | — | — | — | — | NE 2 | — |
| kJ | 10 | 36 | 12 | 22 | 1 | 1 | 3 | 6 | 7 | — | 1 | — | — | — | — | — | — | — | 1 | — |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 102 | 0 | 0 | 0 | 0 | 151 | 656 | 73 | 2 | 0 | 0 | 0 | 94 | 0 | 0 | 40 | 0 | 0 | 660 | 0 |
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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