Surf Forecasts:
Thirroul surf forecast from 20 Jul 2026:
- Best quality surf: Monday 20 Jul, 7PM (local time) - 5ft (1.6m), 11s period, ENE swell with cross-offshore winds.
- Most powerful swell: Monday 20 Jul, 7PM (local time) - 5ft (1.6m), 11s period, ENE swell with 586 kJ wave energy.
- Next surfable swell (1★+): Monday 20 Jul, 7PM (local time) - 5ft (1.6m), 11s 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 Monday (Jul 20) at 7PM. The primary swell is predicted to be 1.6m and 11s period with a secondary swell of 0.6m and 11s. Another secondary swell of 0.7m and 4s 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 1.6m 11s and forecast to arrive on Monday (Jul 20) at 7PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 4s period and expected on Monday (Jul 20) at 10PM.
| Wave Type | Time (AEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 7PM (Mon 20th Jul) | 5ft (1.6m) 11s |
| Best Surf | 7PM (Mon 20th Jul) | 5ft (1.6m) 11s |
| Most Powerful | 7PM (Mon 20th Jul) | 5ft (1.6m) 11s |
Table - best surf conditions forecast for Thirroul over the next 16 days.
The Lowdown
G'day, Rusty here. The next couple of weeks at Thirroul start off with a bit of clean, moderate ENE swell, but the real firecracker is waiting in the first week of August. The water temp is sitting at 65.3°, a touch warmer than normal for this time of year, so you might not need the thickest rubber.
Let's kick off Monday the 20th of July. Morning session brings a 5.2ft ENE swell with a 11-second period and a light cross-off breeze from the NW. Combined energy is moderate at 723, and the conditions are clean. It's a solid start – expect very good surf. The afternoon turns a bit messy with a cross-shore wind, so get it early.
Tuesday the 21st stays similar: 4.3ft ENE in the morning, clean with a light cross-off, but the swell's a touch smaller. Wednesday the 22nd offers a 3.3ft ENE swell with a glassy offshore wind from the west – clean but small. Thursday the 23rd drops off to 2.3ft and the wind picks up, not worth a paddle.
Then Friday the 24th brings a glassy morning with a 5.2ft S swell – period 9 seconds, combined energy 420. The wind is dead calm, so it'll be clean. Saturday the 25th serves up 3.6ft S swell with glassy conditions again in the afternoon. Sunday the 26th is mediocre with a cross-on breeze.
The following week starts with a few clean mornings on the 27th and 28th, but nothing special. Wednesday the 29th gets ugly with strong cross-onshore winds and a long-period SSE swell – big energy but messy. Thursday the 30th and Friday the
Short Range ForecastMostly dry. Warm (max 20°C on Wed morning, min 10°C on Mon night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Very mild (max 19°C on Sat morning, min 6°C on Thu night). Wind will be generally light. | ||||||||||||||||||||
Monday 20 | Tuesday 21 | Wednesday 22 | Thursday 23 | Friday 24 | Saturday 25 | Sunday 26 | |||||||||||||||
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 11 | ENE 11 | ENE 10 | ENE 10 | ENE 10 | ENE 10 | ENE 10 | ENE 10 | ENE 10 | ENE 9 | ENE 9 | S 8 | S 9 | S 10 | SSE 13 | S 11 | S 11 | S 12 | S 10 | S 10 | S 9 |
Wave Graph  | |||||||||||||||||||||
 kJ | 561 | 572 | 419 | 331 | 286 | 235 | 179 | 175 | 129 | 73 | 71 | 273 | 386 | 320 | 554 | 289 | 311 | 456 | 296 | 235 | 256 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross | cross-off | cross-off | cross | cross-off | off | cross-off | off | cross-off | cross-off | cross-off | glassy | cross-off | cross-off | cross-off | glassy | cross-off | cross-off | cross-on | off |
High Tide | 1:01PM1.26m | 00:57AM1.14m | 1:53PM1.27m | 1:54AM1.01m | 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 | ||||||||
Low Tide | 7:05PM0.46m | 7:14AM0.31m | 8:15PM0.49m | 7:57AM0.39m | 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 | ||||||||
 | |  | | | |  | | |  | | | | | | | | | | | | |
 | 6:58 | — | — | 6:56 | — | — | 6:56 | — | — | 6:56 | — | — | 6:56 | — | — | 6:54 | — | — | 6:54 | — | — |
 | — | 5:07 | — | — | 5:07 | — | — | 5:07 | — | — | 5:08 | — | — | 5:08 | — | — | 5:09 | — | — | 5:10 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 17 | 17 | 12 | 18 | 17 | 13 | 20 | 19 | 14 | 17 | 16 | 9 | 14 | 16 | 10 | 19 | 18 | 13 | 18 | 16 | 11 |
Feels °C | 14 | 14 | 11 | 15 | 14 | 11 | 18 | 16 | 11 | 11 | 10 | 3 | 11 | 12 | 5 | 16 | 16 | 9 | 14 | 13 | 8 |
Swell 1 Height (m) Direction Period (s) | ENE 11 | ENE 11 | ENE 10 | ENE 10 | ENE 10 | ENE 10 | ENE 10 | ENE 10 | ENE 10 | ENE 9 | ENE 9 | S 8 | S 9 | S 10 | SSE 13 | S 11 | S 11 | S 12 | S 10 | S 10 | S 9 |
| kJ | 561 | 572 | 419 | 331 | 286 | 235 | 179 | 175 | 129 | 73 | 71 | 273 | 386 | 320 | 554 | 289 | 311 | 456 | 296 | 235 | 256 |
Swell 2 Height (m) Direction Period (s) | S 12 | S 11 | S 11 | S 10 | S 10 | S 10 | SSE 10 | S 11 | S 10 | S 10 | S 8 | ENE 9 | ENE 9 | NE 8 | ENE 8 | ENE 8 | SSE 16 | ENE 8 | ENE 8 | NE 8 | NE 8 |
| kJ | 139 | 93 | 57 | 35 | 31 | 17 | 19 | 21 | 8 | 8 | 28 | 45 | 29 | 18 | 14 | 14 | 107 | 7 | 7 | 3 | 2 |
Swell 3 Height (m) Direction Period (s) | SSE 15 | SSE 15 | SE 14 | SSE 15 | SSE 14 | SE 13 | SE 13 | S 12 | SW 4 | SW 5 | SE 8 | SE 8 | S 16 | SSE 21 | — | SSE 19 | ENE 8 | — | N 6 | NE 8 | NE 8 |
| kJ | 23 | 21 | 8 | 21 | 20 | 7 | 6 | 3 | 1 | 1 | 3 | 2 | 5 | 84 | — | 36 | 7 | — | 1 | 2 | 2 |
Wind waves Height (m) Direction Period (s) | — | NE 3 | NW 3 | N 3 | NE 4 | NNE 4 | — | — | W 3 | SW 4 | SW 3 | WSW 3 | — | — | W 3 | — | — | W 3 | — | — | — |
| kJ | — | 5 | 2 | 5 | 13 | 18 | — | — | 1 | 13 | 3 | 2 | — | — | 1 | — | — | 1 | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 10 | 0 | 0 | 51 | 0 | 0 | 0 | 0 | 2 | 2 | 2 | 0 | 0 | 2 | 0 | 0 | 2 | 5 | 5 | 0 |
Best forecast wave conditions in Illawarra | |||||||||||||||||||||
Best forecast wave conditions in Australia | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
FREE! Surf-Forecast.com widget for your website
The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Thirroul surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
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.
Nearest