Surf Forecasts:
Thirroul surf forecast from 11 Jul 2026:
- Best quality surf: Wednesday 15 Jul, 10PM (local time) - 7ft (2.1m), 10s period, S swell with cross-offshore winds.
- Most powerful swell: Wednesday 15 Jul, 7PM (local time) - 7ft (2.2m), 10s period, S swell with 1,026 kJ wave energy.
- Next surfable swell (1★+): Wednesday 15 Jul, 1AM (local time) - 1.5ft (0.5m), 11s 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 Wednesday (Jul 15) at 1AM. The primary swell is predicted to be 0.5m and 11s period with a secondary swell of 0.4m and 4s. 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 Wednesday (Jul 15) at 7PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.8m 4s period and expected on Sunday (Jul 12) at 4AM.
| Wave Type | Time (AEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 1AM (Wed 15th Jul) | 1.5ft (0.5m) 11s |
| Best Surf | 10PM (Wed 15th Jul) | 7ft (2.1m) 10s |
| Most Powerful | 7PM (Wed 15th Jul) | 7ft (2.2m) 10s |
Table - best surf conditions forecast for Thirroul over the next 16 days.
G’day, I’m Rusty, and let’s talk about the waves at Thirroul for the next couple of weeks.
Straight off, there’s nothing to get excited about for the first few days. The first real surf shows up on Wednesday morning the 15th, so there’s a quiet gap before that.
Wednesday morning the 15th brings a south swell at 6ft, with a period of 10 seconds. The combined energy is moderate at 1027. Wind is south at 9 mph, cross-shore, so a little bumpy but rideable. This one’s for intermediate surfers.
Thursday the 16th morning keeps the south swell at 6ft, period drops to 9 seconds, energy 754. Still cross-shore, but cleaner in the morning.
Saturday the 18th morning is where it gets nice. Glassy conditions with a 3ft easterly swell, 9-second period, energy 274. Dead calm wind – that’s going to be smooth.
Sunday the 19th morning: easterly swell at 6ft, 8-second period, energy 375. Light cross-offshore wind from the NNW at 6 mph. Clean and fun.
Monday the 20th morning is a standout. We’ve got a clean 6ft easterly swell with a 10-second period, energy 798, and a gentle offshore wind from the WNW at 9 mph. This one’s shaping up real nice.
Tuesday the 21st gets bigger at 7ft from the east, 11-second period, energy strong at 1229. Wind’s cross-shore from the south, so it’ll be a bit lumpy and more for intermediates.
Wednesday the 22nd morning: glassy again, 6ft easterly swell, 11-second period, energy 880. Flat calm – beautiful.
Into the second week, Thursday the 23rd morning sees a powerful 12ft swell from the south-southeast, 10-second period, energy huge at 3753. That’s for experts only. Wind is light offshore from the west at 6 mph, so it will be clean but very heavy. Friday the 24th morning is glassy with the same 12ft from the southeast, energy 2729. Again, only experienced surfers.
It drops back after that. Saturday the 25th morning is glassy with 7ft from the east-southeast, 10 seconds, energy 822. Sunday the 26th morning has a smaller 4ft easterly swell, light cross-offshore wind, energy 283.
Pick of the bunch: Monday the 20th morning for the clean offshore east swell, and if you’ve got the skills, Friday the 24th morning for the big glassy groundswell. Crowds at Thirroul can pop up sometimes, so expect company on the good days. Water temp is around 65°F, which is pretty average for this time of year.
Stay salty,
Rusty
Short Range ForecastMostly dry. Very mild (max 19°C on Tue morning, min 9°C on Sat night). Mainly fresh winds. | Days 5-7 Weather SummaryMostly dry. Very mild (max 17°C on Tue afternoon, min 10°C on Tue night). Wind will be generally light. | ||||||||||||||||||||
Sat 11 | Sunday 12 | Monday 13 | Tuesday 14 | Wednesday 15 | Thursday 16 | Friday 17 | |||||||||||||||
PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | |
Swell Height Map |  |  |  |  |  |  |  |  | |||||||||||||
Wave Height (m) Direction Period (s) | ESE 11 | ESE 10 | ESE 10 | ESE 10 | ESE 9 | S 12 | S 11 | S 7 | S 7 | S 12 | S 11 | S 10 | S 11 | S 10 | S 9 | S 8 | S 7 | S 5 | SSE 5 | E 9 | E 9 |
Wave Graph  | |||||||||||||||||||||
 kJ | 176 | 149 | 77 | 54 | 17 | 11 | 10 | 4 | 3 | 11 | 56 | 666 | 734 | 782 | 482 | 233 | 59 | 35 | 42 | 136 | 157 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-off | off | off | off | off | off | cross-off | off | cross-off | cross-off | cross | cross-on | cross-off | cross | cross-on | cross-off | cross | cross-on | cross-off | glassy |
High Tide | 5:22PM1.60m | 6:09AM1.05m | 6:18PM1.70m | 7:10AM1.09m | 7:12PM1.77m | 8:06AM1.12m | 8:05PM1.81m | 8:57AM1.15m | 8:55PM1.80m | 9:47AM1.18m | 9:44PM1.74m | 10:35AM1.20m | 10:31PM1.62m | 11:23AM1.22m | |||||||
Low Tide | 00:15AM0.15m | 11:39AM0.29m | 1:13AM0.04m | 12:36PM0.27m | 2:07AM-0.03m | 1:31PM0.24m | 2:57AM-0.07m | 2:25PM0.23m | 3:45AM-0.07m | 3:17PM0.24m | 4:30AM-0.03m | 4:10PM0.28m | 5:13AM0.04m | ||||||||
 |  |  | | | | | | | |  | | | | | | | | | | | |
 | — | — | 7:01 | — | — | 7:01 | — | — | 7:00 | — | — | 7:00 | — | — | 7:00 | — | — | 6:58 | — | — | 6:58 |
 | 5:00 | — | — | 5:01 | — | — | 5:01 | — | — | 5:02 | — | — | 5:04 | — | — | 5:04 | — | — | 5:05 | — | 5:05 |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 17 | 12 | 13 | 12 | 12 | 16 | 15 | 12 | 19 | 17 | 12 | 14 | 14 | 11 | 15 | 15 | 12 | 16 | 15 | 12 | 17 |
Feels °C | 14 | 9 | 6 | 5 | 6 | 10 | 10 | 9 | 14 | 12 | 8 | 11 | 10 | 8 | 11 | 12 | 9 | 13 | 12 | 10 | 15 |
Swell 1 Height (m) Direction Period (s) | SE 8 | ESE 10 | ESE 10 | ESE 10 | ESE 9 | S 12 | S 11 | S 7 | S 7 | S 12 | S 11 | S 10 | — | S 10 | S 8 | SSE 7 | S 7 | E 5 | E 8 | E 9 | E 9 |
| kJ | 109 | 149 | 77 | 54 | 17 | 11 | 10 | 4 | 3 | 11 | 56 | 361 | — | 550 | 272 | 132 | 59 | 5 | 29 | 136 | 157 |
Swell 2 Height (m) Direction Period (s) | ESE 11 | SSE 8 | SE 8 | SSE 8 | S 8 | ESE 9 | S 7 | S 11 | S 10 | S 6 | S 4 | — | — | — | — | S 13 | ESE 5 | S 11 | E 12 | S 10 | S 10 |
| kJ | 176 | 45 | 16 | 6 | 13 | 7 | 1 | 2 | 2 | 1 | 6 | — | — | — | — | 3 | 9 | 22 | 11 | 32 | 8 |
Swell 3 Height (m) Direction Period (s) | S 15 | S 15 | NNE 5 | — | SE 8 | S 7 | SE 8 | E 8 | — | — | E 10 | — | — | — | — | E 11 | S 12 | E 7 | S 18 | SSE 21 | S 19 |
| kJ | 4 | 4 | 2 | — | 2 | 1 | 3 | 1 | — | — | 2 | — | — | — | — | 2 | 11 | 4 | 6 | 42 | 7 |
Wind waves Height (m) Direction Period (s) | N 2 | NNW 3 | W 4 | W 4 | W 3 | W 3 | W 3 | NW 2 | W 3 | SW 3 | WSW 3 | S 10 | S 11 | S 10 | S 9 | S 8 | — | S 5 | SSE 5 | S 4 | S 6 |
| kJ | 1 | 8 | 13 | 9 | 8 | 8 | 3 | 1 | 5 | 5 | 2 | 666 | 734 | 782 | 482 | 233 | — | 35 | 42 | 19 | 102 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 2 | 2 | 73 | 89 | 38 | 246 | 141 | 280 | 280 | 280 | 0 | 5 | 36 | 0 | 5 | 27 | 0 | 38 | 39 | 0 | 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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