Surf Forecasts:
Thirroul surf forecast from 15 Jul 2026:
- Best quality surf: Thursday 16 Jul, 1AM (local time) - 6ft (1.8m), 7s period, S swell with cross-offshore winds.
- Most powerful swell: Wednesday 15 Jul, 1PM (local time) - 7ft (2.1m), 9s period, S swell with 771 kJ wave energy.
- Next surfable swell (1★+): Thursday 16 Jul, 1AM (local time) - 6ft (1.8m), 7s 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 Thursday (Jul 16) at 1AM. The primary swell is predicted to be 1.8m and 7s period with a secondary swell of 1.4m and 7s. Another secondary swell of 0.1m and 11s 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 2.1m 9s and forecast to arrive on Wednesday (Jul 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 0.5m 3s period and expected on Tuesday (Jul 21) at 1AM.
| Wave Type | Time (AEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 1AM (Thu 16th Jul) | 6ft (1.8m) 7s |
| Best Surf | 1AM (Thu 16th Jul) | 6ft (1.8m) 7s |
| Most Powerful | 1PM (Wed 15th Jul) | 7ft (2.1m) 9s |
Table - best surf conditions forecast for Thirroul over the next 16 days.
The Lowdown
G’day, I’m Rusty, and here’s the outlook for Thirroul.
Alright, let’s be honest – the next week and a half is a bit of a grind. We’ve got a solid pulse of swell early on Wednesday the 15th, with a 7ft south swell, but the wind is a cross-shore mess, so it’s gonna be chopped and not really worth paddling out for. The combined energy is moderate (891), but the conditions just aren’t there. Thursday and Friday drop off fast, with the swell shrinking and the period getting short and weak, so that’s a write-off. Saturday and Sunday are tiny and onshore, with poor surf conditions.
The real standout, and the only one I’d get excited about, is Monday the 20th. That morning we’ve got a clean 5ft swell from the east-northeast, 10-second period, with a light offshore north wind. The combined energy is moderate (540), and the forecast says “very good surf conditions.” Winds are light offshore, so it’ll be clean and lined up. This is the best of the whole run. Tuesday the 21st morning is also clean with a 5ft east-northeast swell, but it won’t be quite as punchy.
After that, things get a bit inconsistent again, but there’s a couple of nice windows. Wednesday the 22nd afternoon goes glassy, with a 4ft east-northeast swell – that’s a real gem for a sunset session. The combined energy drops to 271, but it’s clean. Thursday the 23rd afternoon is another standout: a 5ft east swell, 11-second period, with gentle offshore west wind. That’s a moderate energy (566) and “very good surf conditions” again. Perfect for Thirroul’s reef and beach setup.
The water temperature is sitting around 64°, which is pretty much normal for winter around here, so no surprises. Crowds at Thirroul can be there sometimes, but on those clean days, it’s worth dealing with a few others.
From the 25th onwards, it gets small again. The 27th and 28th have a few tiny clean waves, but you’ll be on a longboard. The 30th is the last gasp, with a little 2ft clean wave in the morning, but it’s weak (84 combined energy). Honestly, after the 24th, the surf is minimal for a solid week.
So, if you’re chasing waves, hit Monday the 20th morning or Thursday the 23rd afternoon. That’s your best bet.
Rusty.
Short Range ForecastLight rain (total 2mm), mostly falling on Thu night. Very mild (max 16°C on Thu morning, min 11°C on Wed night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Very mild (max 17°C on Mon morning, min 12°C on Sun night). Wind will be generally light. | ||||||||||||||||||||
Wednesday 15 | Thursday 16 | Friday 17 | Saturday 18 | Sunday 19 | Monday 20 | Tuesday 21 | |||||||||||||||
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 10 | S 9 | S 7 | S 8 | S 7 | SSE 7 | S 6 | S 5 | S 10 | S 10 | ENE 7 | E 8 | ENE 11 | ENE 11 | ENE 10 | ENE 10 | ENE 10 | ENE 10 | ENE 10 | ENE 10 | ENE 10 |
Wave Graph  | |||||||||||||||||||||
 kJ | 891 | 703 | 352 | 279 | 320 | 189 | 89 | 36 | 104 | 52 | 69 | 169 | 631 | 631 | 473 | 416 | 356 | 388 | 370 | 314 | 301 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-on | cross-off | cross | cross | cross | cross | cross-on | cross | cross | cross-on | cross | cross-on | cross-on | glassy | cross-off | cross | off | cross-off | cross | cross-off |
High Tide | 8:55PM1.80m | 9:47AM1.18m | 9:44PM1.74m | 10:35AM1.20m | 10:31PM1.62m | 11:23AM1.22m | 11:18PM1.47m | 12:12PM1.24m | 00:06AM1.30m | 1:01PM1.26m | 00:57AM1.14m | 1:53PM1.27m | 1:54AM1.01m | ||||||||
Low Tide | 2:25PM0.23m | 3:45AM-0.07m | 3:17PM0.24m | 4:30AM-0.03m | 4:10PM0.28m | 5:13AM0.04m | 5:05PM0.33m | 5:54AM0.13m | 6:03PM0.40m | 6:34AM0.22m | 7:05PM0.46m | 7:14AM0.31m | 8:15PM0.49m | ||||||||
 | |  | |  |  |  | |  | | | | | | | | | | | | | |
 | 7:00 | — | — | 7:00 | — | — | 6:58 | — | — | 6:58 | — | — | 6:58 | — | — | 6:58 | — | — | 6:56 | — | — |
 | — | 5:04 | — | — | 5:04 | — | — | 5:05 | — | — | 5:05 | — | — | 5:06 | — | — | 5:07 | — | — | 5:07 | — |
mm | — | — | — | — | — | 1 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 15 | 14 | 12 | 16 | 15 | 14 | 15 | 15 | 14 | 16 | 15 | 14 | 16 | 16 | 14 | 17 | 17 | 13 | 19 | 18 | 14 |
Feels °C | 10 | 9 | 8 | 11 | 10 | 10 | 12 | 12 | 12 | 13 | 12 | 11 | 13 | 14 | 13 | 14 | 14 | 12 | 16 | 15 | 12 |
Swell 1 Height (m) Direction Period (s) | — | S 8 | SSE 7 | S 18 | SSE 18 | SSE 19 | E 5 | E 5 | S 10 | E 7 | ENE 7 | E 8 | ENE 11 | ENE 11 | ENE 10 | ENE 10 | ENE 10 | ENE 10 | ENE 10 | ENE 10 | ENE 10 |
| kJ | — | 465 | 220 | 6 | 32 | 34 | 11 | 12 | 104 | 52 | 69 | 169 | 631 | 631 | 473 | 416 | 356 | 388 | 370 | 314 | 301 |
Swell 2 Height (m) Direction Period (s) | — | — | E 11 | E 11 | S 13 | E 11 | E 8 | S 8 | E 7 | S 10 | S 10 | S 8 | S 8 | S 16 | S 12 | S 12 | S 12 | S 11 | S 10 | S 10 | S 10 |
| kJ | — | — | 2 | 2 | 13 | 2 | 1 | 30 | 33 | 46 | 44 | 22 | 10 | 131 | 80 | 103 | 99 | 57 | 33 | 31 | 17 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | E 11 | E 11 | S 15 | ENE 7 | S 21 | SE 20 | S 19 | SSE 18 | SSE 17 | SE 16 | SE 16 | ESE 15 | SE 14 | SE 14 | SE 14 | SE 13 | SE 13 |
| kJ | — | — | — | — | 2 | 2 | 4 | 5 | 8 | 16 | 29 | 32 | 58 | 11 | 10 | 21 | 8 | 8 | 7 | 7 | 7 |
Wind waves Height (m) Direction Period (s) | S 10 | S 9 | S 7 | S 8 | S 7 | SSE 7 | S 6 | S 5 | — | S 4 | S 4 | — | — | — | — | — | — | N 3 | N 3 | NE 3 | — |
| kJ | 891 | 703 | 352 | 279 | 320 | 189 | 89 | 36 | — | 14 | 11 | — | — | — | — | — | — | 4 | 6 | 3 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 5 | 79 | 0 | 86 | 118 | 39 | 38 | 5 | 2 | 11 | 39 | 5 | 5 | 11 | 0 | 0 | 6 | 0 | 0 | 51 | 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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