Surf Forecasts:
Thirroul surf forecast from 22 Jul 2026:
- Best quality surf: Friday 24 Jul, 7PM (local time) - 3.5ft (1.1m), 10s period, S swell with offshore winds.
- Most powerful swell: Friday 24 Jul, 10PM (local time) - 5.5ft (1.7m), 13s period, S swell with 957 kJ wave energy.
- Next surfable swell (1★+): Wednesday 22 Jul, 4PM (local time) - 3.5ft (1.0m), 10s period with ENE 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 22) at 4PM. The primary swell is predicted to be 1.0m and 10s period with a secondary swell of 0.3m and 11s. 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 1.7m 13s and forecast to arrive on Friday (Jul 24) at 10PM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 4s period and expected on Thursday (Jul 23) at 7PM.
| Wave Type | Time (AEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 4PM (Wed 22nd Jul) | 3.5ft (1.0m) 10s |
| Best Surf | 7PM (Fri 24th Jul) | 3.5ft (1.1m) 10s |
| Most Powerful | 10PM (Fri 24th Jul) | 5.5ft (1.7m) 13s |
Table - best surf conditions forecast for Thirroul over the next 16 days.
The Lowdown
Alright, mate, Rusty here. Let’s talk about what’s cooking.
We’re looking at Thirroul. Water temp is roughly 65°F, which is bang on average for the season. No surprises.
Starting off on Wednesday, July 22nd, we’ve got a clean little 3ft swell coming from the ENE with an 10-second period. Wind is light cross-off, so the surface will be nice. The combined energy is 204 – moderate. It’s a slow, cruisy day. Thursday the 23rd drops off to 3ft with stronger side winds, so not much to get excited about.
Friday July 24th morning brings a south swell at 4ft with a light cross-off breeze. That’s got some life. Energy hits 288 – solid. The afternoon still holds 5ft but with an onshore wind, so the shape goes a bit pear-shaped.
Now, Saturday July 25th is your best bet for the first week. Morning has 4ft south swell, 10-second period, and a nice offshore wind from the west at around 9 mph. The combined energy is 396. That’s clean, lined-up, and fun. The afternoon goes glassy with 3ft and an 11-second period – perfect for a longboard or a fish. That’s a proper session.
Sunday the 26th and Monday the 27th have small windows but nothing that stands out against the wind.
Now fast forward to Tuesday August 4th. The big stuff arrives. Morning gives us a 13ft SSE swell with a 12-second period, and light cross-off wind. Combined energy is 4,695 – that’s proper strong. Experts only. By the afternoon it’s 16ft with 14-second period and energy hitting 9,375. It’s clean but massive.
Wednesday August 5th is a monster: 21ft swell, combined energy over 22,600. It’s clean with offshore wind, but this beach and reef break will be absolute chaos. Not for the average surfer, and probably more suited to big wave chargers or even kite gear. Thursday the 6th is still heavy at 14ft.
The pick of the bunch: Saturday July 25th for the everyday surfer. For the heavy crew, Tuesday August 4th morning is the call – but you’d better know what you’re doing.
This is Rusty, out.
Short Range ForecastMostly dry. Warm (max 20°C on Wed morning, min 7°C on Thu night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 20°C on Sat morning, min 10°C on Sat night). Wind will be generally light. | ||||||||||||||||||||
Wednesday 22 | Thursday 23 | Friday 24 | Saturday 25 | Sunday 26 | Monday 27 | Tuesday 28 | |||||||||||||||
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) | ENE 10 | ENE 10 | ENE 10 | ENE 9 | ENE 9 | S 9 | S 9 | S 12 | S 12 | S 10 | S 11 | S 12 | S 10 | S 10 | S 9 | S 9 | S 9 | S 8 | SSE 9 | S 9 | S 9 |
Wave Graph  | |||||||||||||||||||||
 kJ | 179 | 175 | 103 | 94 | 73 | 177 | 252 | 546 | 827 | 374 | 223 | 384 | 367 | 267 | 164 | 122 | 96 | 49 | 26 | 14 | 8 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | off | cross-off | cross-off | cross-off | cross-off | cross-on | cross-off | off | glassy | cross-off | cross | on | cross-off | glassy | cross | off | cross-off | cross-on | cross-off |
High Tide | 2:46PM1.28m | 3:00AM0.92m | 3:41PM1.30m | 4:12AM0.87m | 4:35PM1.33m | 5:17AM0.88m | 5:25PM1.37m | 6:11AM0.91m | 6:11PM1.42m | 6:56AM0.95m | 6:53PM1.48m | 7:36AM0.99m | 7:32PM1.52m | ||||||||
Low Tide | 9:28PM0.50m | 8:45AM0.45m | 10:38PM0.47m | 9:39AM0.49m | 11:37PM0.42m | 10:35AM0.49m | 00:25AM0.36m | 11:28AM0.47m | 1:07AM0.30m | 12:15PM0.43m | 1:45AM0.24m | 12:58PM0.40m | 2:20AM0.20m | ||||||||
 | |  |  |  | | | | | | |  | | | | | | | | | | |
 | 6:56 | — | — | 6:56 | — | — | 6:56 | — | — | 6:54 | — | — | 6:54 | — | — | 6:54 | — | — | 6:52 | — | — |
 | — | 5:07 | — | — | 5:08 | — | — | 5:08 | — | — | 5:09 | — | — | 5:10 | — | — | 5:10 | — | — | 5:12 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 20 | 19 | 14 | 18 | 17 | 10 | 14 | 13 | 9 | 20 | 19 | 12 | 16 | 15 | 13 | 17 | 16 | 13 | 18 | 17 | 14 |
Feels °C | 17 | 17 | 11 | 13 | 11 | 4 | 10 | 10 | 4 | 17 | 17 | 9 | 13 | 12 | 11 | 14 | 13 | 11 | 15 | 14 | 13 |
Swell 1 Height (m) Direction Period (s) | ENE 10 | ENE 10 | ENE 10 | ENE 9 | ENE 9 | S 9 | S 9 | S 12 | S 12 | S 10 | S 11 | S 12 | S 10 | S 10 | S 9 | S 9 | S 9 | S 8 | SSE 9 | S 9 | S 9 |
| kJ | 179 | 175 | 103 | 94 | 73 | 177 | 252 | 546 | 827 | 374 | 223 | 384 | 367 | 267 | 164 | 122 | 96 | 49 | 26 | 14 | 6 |
Swell 2 Height (m) Direction Period (s) | SSE 10 | S 11 | S 10 | S 10 | S 9 | ENE 9 | ENE 9 | ENE 8 | ENE 8 | ENE 9 | ENE 8 | ENE 8 | NE 8 | NE 8 | NE 8 | NE 8 | SE 14 | SE 16 | SE 15 | SE 15 | SE 14 |
| kJ | 19 | 21 | 8 | 7 | 14 | 45 | 29 | 28 | 14 | 15 | 7 | 7 | 3 | 2 | 2 | 2 | 8 | 10 | 8 | 8 | 8 |
Swell 3 Height (m) Direction Period (s) | SE 13 | SE 12 | — | — | SE 8 | SE 8 | S 19 | SSE 18 | — | S 19 | E 9 | E 8 | — | — | SE 13 | SE 18 | NE 8 | E 8 | — | SE 6 | — |
| kJ | 6 | 6 | — | — | 3 | 2 | 7 | 64 | — | 7 | 2 | 1 | — | — | 7 | 12 | 2 | 1 | — | 2 | — |
Wind waves Height (m) Direction Period (s) | — | — | W 3 | WSW 2 | WSW 3 | WSW 3 | W 3 | — | WNW 3 | WNW 3 | — | SW 3 | W 3 | — | — | — | — | N 3 | NNE 3 | NE 2 | — |
| kJ | — | — | 1 | 1 | 5 | 4 | 1 | — | 1 | 1 | — | 2 | 1 | — | — | — | — | 2 | 2 | 1 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 2 | 2 | 2 | 0 | 6 | 2 | 0 | 0 | 0 | 2 | 36 | 0 | 0 | 21 | 0 | 10 | 245 | 157 |
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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