Surf Forecasts:
Thirroul surf forecast from 8 Aug 2026:
- Best quality surf: Sunday 9 Aug, 1PM (local time) - 3.5ft (1.0m), 10s period, ENE swell with cross-offshore winds.
- Most powerful swell: Monday 10 Aug, 4AM (local time) - 8ft (2.4m), 8s period, NE swell with 734 kJ wave energy.
- Next surfable swell (1★+): Saturday 8 Aug, 10PM (local time) - 1.5ft (0.5m), 8s period with E 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 (Aug 08) at 10PM. The primary swell is predicted to be 0.5m and 8s period with a secondary swell of 0.3m and 7s. 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 2.4m 8s and forecast to arrive on Monday (Aug 10) at 4AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.0m 4s period and expected on Monday (Aug 10) at 1PM.
| Wave Type | Time (AEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 10PM (Sat 8th Aug) | 1.5ft (0.5m) 8s |
| Best Surf | 1PM (Sun 9th Aug) | 3.5ft (1.0m) 10s |
| Most Powerful | 4AM (Mon 10th Aug) | 8ft (2.4m) 8s |
Table - best surf conditions forecast for Thirroul over the next 16 days.
The Lowdown
Alright, Rusty here. Let's have a look at what's on the menu for the next couple of weeks at Thirroul.
Honestly, it's a bit of a slow burn. We're staring down the barrel of a very long, quiet spell to kick things off. The first few days are pretty ordinary, with tiny, weak swell and not much to get excited about. The real action doesn't start to build until the middle of next week, and the standout session is further out, so you'll need some patience.
The water temp is sitting right on average for this time of year, at 64°F, nothing unusual there.
Let's start with the first real glimmer of hope. Thursday morning, August 13th, is the pick of the first week. Thirroul should see a pulse of 5ft S swell, with a moderate combined energy of 337. The wind is looking clean from the SW, so it should be a nice session. It's a beach and reef setup, so the S direction is a good match for the swell window.
The absolute standout, and the one I'd circle on the calendar, is Monday morning, August 17th. The wind will be glassy from the WSW, and we'll see a clean 3ft SSE swell. The combined energy is moderate at 231, and that glassy wind will make for some silky-smooth conditions. That's the session to aim for.
After that, the forecast gets a bit messy again. The swell picks up Tuesday, August 18th, with a choppy 5ft S swell (208 combined energy), but the onshore breeze will spoil it. From there, it fades out into small, weak surf for the rest of the second week, with very little of interest.
So, to sum it up: the early part is a write-off, but there's a nice little window mid-week and a glassy morning to look forward to on the 17th. Don't hold your breath for the second week.
Rusty.
Short Range ForecastLight rain (total 6mm), mostly falling on Sun afternoon. Very mild (max 17°C on Sun morning, min 9°C on Sat night). Winds increasing (calm on Sat morning, fresh winds from the NW by Mon afternoon). | Days 4-6 Weather SummaryMostly dry. Very mild (max 19°C on Wed morning, min 9°C on Thu night). Winds decreasing (fresh winds from the WSW on Wed night, light winds from the E by Thu afternoon). | ||||||||||||||||||||
Saturday 8 | Sunday 9 | Monday 10 | Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | |||||||||||||||
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 | E 8 | E 8 | E 8 | ENE 9 | NE 7 | ENE 9 | ENE 9 | ENE 10 | ENE 10 | S 11 | ENE 9 | S 10 | S 9 | ENE 10 | S 9 | S 10 | S 8 | S 9 | S 9 | S 9 |
Wave Graph  | |||||||||||||||||||||
 kJ | 44 | 34 | 48 | 61 | 207 | 296 | 497 | 480 | 157 | 80 | 112 | 65 | 72 | 58 | 52 | 299 | 255 | 103 | 207 | 220 | 343 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | cross-on | cross-off | cross-off | cross-off | cross | cross-off | off | off | off | cross-off | cross-off | cross-off | off | cross-off | cross-off | cross-on | cross-off | cross-on | on | cross |
High Tide | 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 | 8:36AM1.23m | 8:37PM1.72m | 9:19AM1.29m | 9:21PM1.63m | ||||||||
Low Tide | 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 | 2:14PM0.20m | 3:15AM-0.02m | 3:03PM0.20m | 3:53AM0.03m | ||||||||
 | |  |  |  |  |  |  | | | |  | | | | | | | | |  | |
 | 6:43 | — | — | 6:43 | — | — | 6:41 | — | — | 6:41 | — | — | 6:39 | — | — | 6:39 | — | — | 6:37 | — | — |
 | — | 5:20 | — | — | 5:21 | — | — | 5:21 | — | — | 5:22 | — | — | 5:22 | — | — | 5:22 | — | — | 5:23 | — |
mm | — | — | — | — | 3 | 2 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 |
Temp °C | 16 | 16 | 11 | 17 | 17 | 15 | 16 | 15 | 16 | 18 | 17 | 10 | 19 | 14 | 12 | 16 | 16 | 11 | 17 | 16 | 15 |
Feels °C | 13 | 12 | 9 | 13 | 13 | 10 | 8 | 10 | 10 | 13 | 11 | 7 | 14 | 8 | 5 | 13 | 14 | 7 | 14 | 13 | 13 |
Swell 1 Height (m) Direction Period (s) | S 8 | E 8 | E 8 | E 8 | SSE 8 | E 14 | ENE 9 | ENE 9 | ENE 10 | ENE 10 | S 11 | ENE 9 | S 10 | S 9 | ENE 10 | S 9 | S 10 | S 8 | S 9 | SSE 9 | S 7 |
| kJ | 44 | 34 | 48 | 61 | 6 | 4 | 497 | 480 | 157 | 80 | 112 | 65 | 72 | 58 | 52 | 299 | 255 | 103 | 207 | 129 | 106 |
Swell 2 Height (m) Direction Period (s) | SSE 9 | S 7 | S 6 | NE 10 | E 14 | SE 9 | — | S 13 | SSW 6 | S 12 | ENE 9 | S 8 | ENE 9 | ENE 9 | S 8 | ENE 10 | S 11 | S 10 | ENE 10 | ENE 10 | S 9 |
| kJ | 31 | 15 | 6 | 27 | 4 | 3 | — | 3 | 4 | 3 | 75 | 31 | 46 | 49 | 12 | 31 | 93 | 54 | 19 | 19 | 41 |
Swell 3 Height (m) Direction Period (s) | ENE 7 | SSE 9 | NE 3 | SSE 8 | S 5 | S 7 | — | — | E 13 | NE 8 | S 12 | S 12 | NNE 7 | — | SE 13 | S 20 | ENE 9 | ENE 10 | S 17 | SE 19 | ENE 10 |
| kJ | 16 | 29 | 2 | 6 | 1 | 1 | — | — | 4 | 34 | 3 | 24 | 5 | — | 7 | 7 | 17 | 19 | 5 | 14 | 9 |
Wind waves Height (m) Direction Period (s) | — | E 2 | — | NNE 4 | ENE 9 | NE 7 | NNW 4 | NW 4 | WSW 4 | SW 6 | — | NW 3 | N 3 | W 2 | SW 6 | WSW 5 | — | WSW 2 | — | S 9 | S 9 |
| kJ | — | 1 | — | 7 | 207 | 296 | 17 | 36 | 11 | 8 | — | 2 | 1 | 2 | 59 | 23 | — | 1 | — | 220 | 343 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 415 | 0 | 0 | 6 | 522 | 12 | 181 | 2 | 0 | 2 | 0 | 0 | 0 | 82 | 0 | 40 | 0 | 5 | 36 | 2 |
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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