
Surf Forecasts:
Thirroul surf forecast from 30 Jul 2026:
- Best quality surf: Friday 31 Jul, 10PM (local time) - 6ft (1.9m), 9s period, S swell with cross-offshore winds.
- Most powerful swell: Friday 31 Jul, 1PM (local time) - 7ft (2.1m), 9s period, S swell with 750 kJ wave energy.
- Next surfable swell (1★+): Friday 31 Jul, 10PM (local time) - 6ft (1.9m), 9s 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 Friday (Jul 31) at 10PM. The primary swell is predicted to be 1.9m and 9s period with a secondary swell of 1.6m and 9s. Another secondary swell of 0.1m and 7s 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 Friday (Jul 31) 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 7PM.
| Wave Type | Time (AEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 10PM (Fri 31st Jul) | 6ft (1.9m) 9s |
| Best Surf | 10PM (Fri 31st Jul) | 6ft (1.9m) 9s |
| Most Powerful | 1PM (Fri 31st Jul) | 7ft (2.1m) 9s |
Table - best surf conditions forecast for Thirroul over the next 16 days.
The Lowdown
G’day, I’m Rusty. Let’s look at what’s coming up for Thirroul over the next couple of weeks.
Right off the bat, there’s a bit of a wait. Friday the 31st is a write-off – a cross-shore wind and dodgy tide make it not worth your time. The real action doesn’t kick off until Saturday morning, the 1st of August.
Saturday the 1st is a real treat to start the run. The morning is glassy – dead calm – with a clean 5ft swell from the SSE. That’s a solid, clean bank for intermediates. Water temp is about 65°, which is average for this time of year. The afternoon stays glassy with a 5ft SSE swell, keeping the vibe mellow and fun. Crowds can show up sometimes, but with conditions this clean, it’s worth the company.
The standout window is Sunday the 2nd. The morning turns on with a 5ft SE groundswell pushing a very long 12-second period, and the wind is a clean cross-off from the NNW. That’s a recipe for well-shaped, powerful lines at Thirroul’s beach-and-reef setup. The combined energy is moderate (675), so there’s plenty of grunt but not too crazy. The afternoon bumps up to a 12 mph cross-shore, so grab the morning – it’s the pick of the whole forecast.
Monday the 3rd drops off fast. The morning is a weak 3ft SE swell with a long 11-second period, but the energy is low (139) and the conditions are only ordinary. The afternoon gets even smaller. Tuesday the 4th is a flat day – 0.7ft waves – so don’t bother.
Wednesday the 5th sees a slight bump back to 3ft to 4ft S swell, but the wind is strong and the conditions are marginal. Thursday the 6th is better but not a standout: a 5ft S swell in the morning with clean cross-off wind, but the afternoon gets onshore and messy.
Friday the 7th is a glassy morning with 5ft SSE swell, but the period is short at 8 seconds, so it’ll be a bit weak and lumpy. The afternoon is onshore. Saturday the 8th and Sunday the 9th are small and average, with swell dropping to 3ft and mostly ordinary conditions.
There’s a solid gap of small, weak surf through Monday the 10th. Then Tuesday the 11th delivers another standout. The morning has a 5ft S swell with a moderate offshore wind from the WNW, and the afternoon is even better: 6ft S swell, 10-second period, and a clean 12 mph offshore wind. The combined energy is strong (691), and the conditions are clean. This is one for the diary – the best of the second week.
Wednesday the 12th has offshore winds again, with a 3ft E swell (very long 12-second period) in the morning, but the energy is moderate (441). The afternoon is a 3ft S swell. It’s surfable but not a standout. Thursday the 13th and Friday the 14th are mixed – strong winds, some offshore, but the swell is inconsistent and small. Saturday the 15th is small and messy to finish.
Overall, the best windows are Sunday the 2nd and Tuesday the 11th. Don’t sleep on Saturday the 1st, either, for a glassy session. The rest of the period is average at best, with a few small days and a flat spell mid-week.
Rusty.
Short Range ForecastMostly dry. Very mild (max 18°C on Sun morning, min 10°C on Fri night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 20°C on Mon morning, min 8°C on Mon night). Wind will be generally light. | ||||||||||||||||||||
Friday 31 | Saturday 1 | Sunday 2 | Monday 3 | Tuesday 4 | Wednesday 5 | Thursday 6 | |||||||||||||||
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 9 | SSE 9 | SSE 9 | SE 11 | SE 12 | SE 12 | SE 11 | SE 11 | SE 10 | SE 11 | SSE 10 | SSE 10 | S 7 | S 10 | S 10 | S 9 | S 9 | SSE 9 | SSE 8 |
Wave Graph | |||||||||||||||||||||
469 | 685 | 459 | 337 | 311 | 521 | 667 | 522 | 314 | 134 | 108 | 29 | 10 | 10 | 15 | 192 | 279 | 235 | 440 | 564 | 385 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-on | cross-off | glassy | glassy | off | cross-off | cross | off | cross-off | cross-off | off | cross-off | off | cross-off | cross-off | cross-off | off | cross-off | on | cross-off |
High Tide | 9:19PM1.53m | 10:01AM1.17m | 9:54PM1.48m | 10:38AM1.21m | 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 | ||||||||
Low Tide | 2:57PM0.34m | 3:57AM0.13m | 3:38PM0.35m | 4:29AM0.14m | 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 | ||||||||
6:50 | — | — | 6:50 | — | — | 6:48 | — | — | 6:48 | — | — | 6:47 | — | — | 6:46 | — | — | 6:46 | — | — | |
— | 5:14 | — | — | 5:15 | — | — | 5:15 | — | — | 5:15 | — | — | 5:16 | — | — | 5:17 | — | — | 5:17 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 14 | 14 | 11 | 14 | 14 | 11 | 18 | 17 | 13 | 20 | 18 | 11 | 15 | 14 | 11 | 17 | 16 | 12 | 16 | 16 | 12 |
Feels °C | 11 | 10 | 8 | 13 | 13 | 9 | 14 | 12 | 11 | 17 | 13 | 8 | 8 | 8 | 6 | 13 | 10 | 7 | 13 | 13 | 10 |
Swell 1 Height (m) Direction Period (s) | S 10 | S 9 | S 9 | SSE 9 | SSE 9 | SE 11 | SE 12 | SE 12 | SE 11 | SE 11 | SE 10 | SE 11 | SSE 10 | SSE 10 | S 7 | S 10 | S 10 | S 9 | S 9 | SSE 9 | SSE 8 |
469 | 505 | 459 | 337 | 311 | 521 | 667 | 522 | 314 | 134 | 108 | 29 | 10 | 10 | 14 | 192 | 279 | 235 | 440 | 564 | 385 | |
Swell 2 Height (m) Direction Period (s) | NE 7 | NE 7 | NE 7 | NE 8 | NE 7 | SE 15 | E 11 | E 17 | NE 5 | NE 5 | NE 5 | ESE 8 | ESE 7 | S 5 | S 9 | E 8 | E 10 | E 9 | E 8 | NE 8 | NE 7 |
2 | 2 | 2 | 2 | 2 | 106 | 2 | 6 | 14 | 6 | 4 | 12 | 5 | 2 | 15 | 5 | 8 | 6 | 1 | 3 | 2 | |
Swell 3 Height (m) Direction Period (s) | E 13 | E 13 | E 12 | E 13 | E 12 | NE 7 | E 18 | S 21 | E 16 | E 16 | E 16 | NE 5 | E 15 | E 7 | E 9 | E 13 | E 13 | E 12 | E 12 | E 12 | E 16 |
3 | 3 | 3 | 3 | 3 | 2 | 6 | 9 | 5 | 5 | 5 | 4 | 4 | 4 | 6 | 14 | 3 | 3 | 3 | 3 | 5 | |
Wind waves Height (m) Direction Period (s) | — | S 9 | — | — | — | NNE 4 | NNW 3 | NE 4 | NNE 5 | NW 3 | NW 3 | WNW 3 | SW 4 | WSW 3 | WSW 4 | WSW 3 | — | W 2 | — | — | — |
— | 685 | — | — | — | 10 | 2 | 13 | 38 | 2 | 3 | 3 | 10 | 5 | 14 | 4 | — | 1 | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 5 | 86 | 0 | 0 | 0 | 0 | 0 | 94 | 0 | 0 | 2 | 0 | 218 | 109 | 71 | 2 | 2 | 0 | 0 | 36 | 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.











