
Surf Forecasts:
Thirroul surf forecast from 29 Jul 2026:
- Best quality surf: Thursday 30 Jul, 4AM (local time) - 7.5ft (2.3m), 10s period, S swell with cross-offshore winds.
- Most powerful swell: Thursday 30 Jul, 4AM (local time) - 7.5ft (2.3m), 10s period, S swell with 964 kJ wave energy.
- Next surfable swell (1★+): Thursday 30 Jul, 4AM (local time) - 7.5ft (2.3m), 10s 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 30) at 4AM. The primary swell is predicted to be 2.3m and 10s period with a secondary swell of 1.6m and 11s. 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 2.3m 10s and forecast to arrive on Thursday (Jul 30) 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 0.8m 4s period and expected on Wednesday (Jul 29) at 7PM.
| Wave Type | Time (AEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 4AM (Thu 30th Jul) | 7.5ft (2.3m) 10s |
| Best Surf | 4AM (Thu 30th Jul) | 7.5ft (2.3m) 10s |
| Most Powerful | 4AM (Thu 30th Jul) | 7.5ft (2.3m) 10s |
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 cookin’ for our stretch of coast.
Well, don’t get your hopes up for a barnstormer this week. The next few days are pretty grim, with only tiny, gutless waves and tricky winds. There’s a real gap in quality surf here, with nothing worth paddling out for until Sunday the 2nd of August. That’s a long quiet spell to sit through.
The first real glimmer of hope comes Sunday morning, the 2nd of August. Thirroul should be the pick of the period. We’re looking at a clean 5ft swell from the SE, with a nice 11 second period on it, giving it a bit of push. The wind is a light cross-off from the NNW – that’ll keep the surface silky. The water is sitting at 66°, which is a touch warmer than normal for this time of year, so you won’t need the thickest rubber. The combined energy is moderate at 700, so there’s enough oomph to get a few decent ones. Be aware, crowds are possible, so get in early for the cleanest ones.
The Monday morning after that, the 3rd of August, is worth a mention but it’s a step down. Swell drops to 3ft from the SE, still with a 10 second period, and the wind goes light offshore from the NW. It’s clean, but it’s small. Combined energy is weak at 178, so it’s more of a longboard session.
After that, the outlook fades again. The 4th and 5th are tiny, and while the 5th of August morning has glassy conditions, the swell is only 2ft with a short 7 second period – barely enough to break. The 6th of August morning has a bit of size at 3ft from the S, but the period is short and the energy is weak at 99. It’s a real grind.
Looking further out, the 10th of August Monday morning has a weird, very long period 18 second swell from the SSE, but it’s only 1.0ft. That’s a ghost swell – all energy, no height. Combined energy is still weak at 79. It’s a tease.
Then on the 13th of August Thursday afternoon, we get a bit more size: 4ft from the S at 11 seconds, with a clean offshore wind from the W. The combined energy hits a moderate 446. That could be worth a look if you’re desperate, but it’s a long way off and the forecast is less certain.
So, the standout is Sunday morning, the 2nd of August at Thirroul. Get out there if you can. The rest of the window is mostly small and average, with a lot of cross-onshore chop to sit through.
Rusty.
Short Range ForecastMostly dry. Very mild (max 17°C on Wed morning, min 7°C on Wed night). Winds decreasing (fresh winds from the W on Wed morning, light winds from the S by Thu morning). | Days 4-6 Weather SummaryMostly dry. Warm (max 20°C on Mon morning, min 8°C on Mon night). Wind will be generally light. | ||||||||||||||||||||
Wednesday 29 | Thursday 30 | Friday 31 | Saturday 1 | Sunday 2 | Monday 3 | Tuesday 4 | |||||||||||||||
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) | SE 13 | S 16 | S 8 | S 8 | S 11 | S 10 | S 10 | S 10 | SSE 10 | SSE 10 | SSE 10 | SE 12 | SE 11 | SE 11 | SE 11 | SE 10 | SE 10 | SE 11 | SE 11 | SE 11 | S 10 |
Wave Graph | |||||||||||||||||||||
7 | 7 | 171 | 320 | 533 | 706 | 640 | 838 | 574 | 461 | 578 | 808 | 685 | 447 | 286 | 170 | 113 | 60 | 32 | 32 | 94 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross-off | cross | cross-on | cross-off | cross | cross-on | cross-off | cross-on | on | cross-off | cross-off | cross | cross-off | off | off | cross-off | cross-off | cross-on | off |
High Tide | 8:08PM1.55m | 8:49AM1.08m | 8:44PM1.56m | 9:25AM1.12m | 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 | ||||||||
Low Tide | 1:39PM0.36m | 2:54AM0.16m | 2:18PM0.34m | 3:26AM0.14m | 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 | ||||||||
6:52 | — | — | 6:50 | — | — | 6:50 | — | — | 6:50 | — | — | 6:48 | — | — | 6:48 | — | — | 6:47 | — | — | |
— | 5:13 | — | — | 5:13 | — | — | 5:14 | — | — | 5:15 | — | — | 5:15 | — | — | 5:15 | — | — | 5:16 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 17 | 16 | 11 | 14 | 13 | 10 | 15 | 14 | 11 | 15 | 15 | 12 | 18 | 17 | 13 | 20 | 20 | 12 | 15 | 14 | 9 |
Feels °C | 9 | 9 | 5 | 9 | 8 | 6 | 11 | 9 | 8 | 13 | 13 | 10 | 14 | 12 | 11 | 14 | 16 | 8 | 10 | 10 | 5 |
Swell 1 Height (m) Direction Period (s) | N 4 | SE 13 | S 8 | S 8 | S 11 | S 10 | S 10 | SSE 10 | SSE 10 | SSE 10 | SSE 10 | SE 12 | SE 11 | SE 11 | SE 11 | SE 10 | SE 10 | SE 11 | SE 11 | SE 11 | S 10 |
1 | 7 | 171 | 320 | 533 | 706 | 640 | 640 | 574 | 461 | 578 | 808 | 685 | 447 | 286 | 170 | 113 | 60 | 32 | 32 | 94 | |
Swell 2 Height (m) Direction Period (s) | SE 13 | S 16 | S 11 | NE 6 | NE 6 | — | NE 7 | NE 7 | NE 7 | NE 8 | NE 7 | NE 7 | E 18 | E 17 | NE 5 | NE 5 | E 16 | ESE 8 | ESE 7 | ESE 9 | SE 11 |
7 | 5 | 88 | 2 | 1 | — | 2 | 2 | 2 | 2 | 2 | 2 | 6 | 6 | 13 | 3 | 5 | 13 | 5 | 8 | 20 | |
Swell 3 Height (m) Direction Period (s) | S 7 | E 8 | E 7 | E 12 | E 12 | — | — | — | E 12 | — | E 19 | E 18 | S 22 | E 17 | E 16 | E 16 | NE 8 | NE 5 | ESE 10 | S 5 | E 8 |
1 | 1 | 1 | 3 | 3 | — | — | — | 3 | — | 7 | 6 | 9 | 6 | 5 | 5 | 3 | 3 | 10 | 2 | 12 | |
Wind waves Height (m) Direction Period (s) | W 2 | WSW 4 | WSW 4 | — | S 9 | — | — | S 10 | — | — | — | NE 4 | N 3 | NE 4 | NNE 5 | NW 2 | NE 4 | W 2 | WSW 3 | — | — |
1 | 19 | 5 | — | 380 | — | — | 838 | — | — | — | 10 | 1 | 10 | 33 | 1 | 7 | 1 | 1 | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 656 | 348 | 5 | 5 | 67 | 0 | 5 | 86 | 0 | 5 | 40 | 0 | 0 | 94 | 0 | 0 | 0 | 2 | 5 | 268 | 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.










