Surf Forecasts:
Thirroul surf forecast from 3 Sep 2026:
- Best quality surf: Friday 4 Sep, 7AM (local time) - 3.5ft (1.1m), 10s period, S swell with offshore winds.
- Most powerful swell: Tuesday 8 Sep, 7AM (local time) - 10ft (3.0m), 9s period, S swell with 1,397 kJ wave energy.
- Next surfable swell (1★+): Friday 4 Sep, 4AM (local time) - 2.5ft (0.8m), 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 Friday (Sep 04) at 4AM. The primary swell is predicted to be 0.8m and 10s period with a secondary swell of 0.4m and 7s. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Thirroul in the next 16 days are 3.0m 9s and forecast to arrive on Tuesday (Sep 08) at 7AM. 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 Saturday (Sep 05) at 7PM.
| Wave Type | Time (AEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 4AM (Fri 4th Sep) | 2.5ft (0.8m) 10s |
| Best Surf | 7AM (Fri 4th Sep) | 3.5ft (1.1m) 10s |
| Most Powerful | 7AM (Tue 8th Sep) | 10ft (3.0m) 9s |
Table - best surf conditions forecast for Thirroul over the next 16 days.
The Lowdown
G’day, Rusty here. Let’s get into it for the Illawarra.
Water temp is about 64°F, which is normal for this time of year—no surprises there.
Thursday 3rd is dead. Swell at 2ft from the south, 10-second period, energy is weak (72). Cross-off wind but total dud.
Friday 4th morning: 3ft S swell, still 10 seconds, but a light WNW offshore wind cleans it up. Energy hits 182. Small and weak but rideable.
Saturday 5th drops to 2ft S swell, NNW cross-off wind. Poor.
Sunday 6th morning has 3ft S swell, 9 seconds, cross-shore wind. Afternoon picks up to 4ft S with onshore wind—energy 419 but messy.
Monday 7th morning: clean with 3ft SSE swell, 10 seconds, NW offshore at 3 mph. Energy 198. Just okay.
Tuesday 8th morning brings 8ft S swell, 9-second period, cross-shore wind. Combined energy is 1726—that’s heavy. Too big for anyone but experts, and the short period will make it lumpy.
Wednesday 9th is rain and onshore wind—4ft to 5ft. No good.
Thursday 10th morning: 4ft S swell, 11-second period, cross-shore. Energy 436. Marginal.
Here’s your one true standout: Friday 11th morning—glassy conditions with ESE wind at 3 mph, 4ft SSE swell, 11-second period. Combined energy 375. This is clean, lined-up surf at Thirroul. Crowds are possible because it’s that good. A weekday glass-off with long-period groundswell—just know the sets will be spaced out.
Saturday 12th: 3ft SSE swell, cross-shore. Energy 278. Not special.
Sunday 13th through Thursday 17th: small swell, 2ft to 5ft, poor wind or low energy. A dry spell for over a week.
Friday 18th morning: another big one—8ft S swell, 9 seconds, energy 1868. Expert-only. Cross-off wind at 12 mph keeps it clean but it’s a brute. Afternoon drops to 7ft SSE with a 30 mph cross-off—still heavy.
Bottom line: Friday 11th morning is your session. Glassy, clean, long-period groundswell at manageable size. The two big days are for the hardcore crew only.
Rusty out.
Short Range ForecastMostly dry. Warm (max 29°C on Sat morning, min 12°C on Sat night). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 2mm), mostly falling on Mon afternoon. Warm (max 23°C on Mon morning, min 10°C on Sun night). Winds increasing (calm on Sun afternoon, fresh winds from the SSW by Mon afternoon). | ||||||||||||||||||||
Thursday 3 | Friday 4 | Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | |||||||||||||||
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 10 | SSE 10 | S 10 | S 7 | S 11 | S 9 | S 10 | S 10 | S 9 | S 10 | S 10 | SSE 10 | SSE 8 | S 8 | S 9 | SSE 8 | SSE 9 | SSE 8 | SSE 8 | S 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 53 | 52 | 32 | 148 | 54 | 57 | 61 | 45 | 28 | 155 | 260 | 235 | 132 | 154 | 329 | 993 | 308 | 322 | 176 | 330 | 119 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross-off | off | cross | cross-off | cross-off | cross-off | cross-off | cross | on | off | off | cross-off | cross | cross | on | cross-off | cross-on | cross-on | cross-on |
High Tide | 12:22PM1.41m | 00:56AM1.01m | 1:27PM1.40m | 2:19AM0.94m | 2:40PM1.42m | 3:46AM0.95m | 3:54PM1.47m | 5:00AM1.00m | 4:59PM1.53m | 5:58AM1.09m | 5:56PM1.59m | 6:46AM1.18m | 6:46PM1.62m | ||||||||
Low Tide | 7:04PM0.34m | 6:40AM0.40m | 8:25PM0.34m | 7:50AM0.45m | 9:47PM0.30m | 9:09AM0.46m | 10:57PM0.22m | 10:24AM0.42m | 11:54PM0.14m | 11:28AM0.35m | 00:42AM0.07m | 12:24PM0.27m | 1:23AM0.03m | ||||||||
 | |  | | | | |  | | | | | |  | | | |  |  |  | | |
 | 6:13 | — | — | 6:11 | — | — | 6:09 | — | — | 6:09 | — | — | 6:07 | — | — | 6:05 | — | — | 6:05 | — | — |
 | — | 5:37 | — | — | 5:38 | — | — | 5:39 | — | — | 5:39 | — | — | 5:40 | — | — | 5:42 | — | — | 5:42 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | 2 | — | — | — | — | 2 | — | — |
Temp °C | 24 | 22 | 15 | 22 | 22 | 15 | 29 | 28 | 19 | 18 | 16 | 13 | 23 | 20 | 12 | 15 | 16 | 12 | 15 | 14 | 14 |
Feels °C | 18 | 17 | 10 | 18 | 20 | 13 | 24 | 23 | 14 | 15 | 13 | 12 | 21 | 16 | 9 | 11 | 14 | 11 | 14 | 9 | 10 |
Swell 1 Height (m) Direction Period (s) | S 10 | S 10 | SSE 10 | S 10 | S 7 | S 7 | S 9 | NE 6 | ENE 6 | S 9 | S 10 | S 10 | SSE 10 | SSE 8 | E 10 | S 9 | SSE 8 | SSE 9 | SSE 8 | SSE 8 | S 8 |
| kJ | 53 | 52 | 32 | 148 | 54 | 24 | 61 | 34 | 28 | 155 | 260 | 235 | 132 | 154 | 8 | 731 | 308 | 322 | 176 | 330 | 115 |
Swell 2 Height (m) Direction Period (s) | NE 6 | NE 6 | NE 7 | NE 8 | NE 8 | S 11 | E 9 | S 10 | S 10 | NE 7 | SSE 12 | NNE 6 | S 8 | NE 7 | NE 6 | E 11 | E 10 | E 10 | E 10 | SSE 16 | S 11 |
| kJ | 11 | 12 | 12 | 15 | 9 | 57 | 7 | 45 | 28 | 16 | 152 | 4 | 66 | 2 | 1 | 2 | 2 | 2 | 2 | 26 | 119 |
Swell 3 Height (m) Direction Period (s) | ENE 10 | ENE 10 | ENE 9 | ENE 10 | ENE 10 | E 10 | S 16 | E 9 | E 11 | E 11 | NE 7 | E 10 | NNE 8 | E 10 | E 8 | — | NE 9 | NE 9 | S 18 | E 9 | SSE 17 |
| kJ | 19 | 19 | 17 | 19 | 9 | 7 | 19 | 7 | 2 | 9 | 7 | 8 | 6 | 8 | 1 | — | 3 | 3 | 6 | 2 | 117 |
Wind waves Height (m) Direction Period (s) | — | WSW 3 | W 3 | — | — | — | NNE 3 | WNW 3 | SW 3 | — | — | — | NW 2 | WSW 2 | S 8 | S 9 | — | — | — | — | SE 7 |
| kJ | — | 3 | 5 | — | — | — | 5 | 6 | 2 | — | — | — | 1 | 1 | 329 | 993 | — | — | — | — | 49 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 2 | 2 | 2 | 0 | 10 | 0 | 6 | 6 | 67 | 2 | 98 | 0 | 0 | 5 | 5 | 36 | 36 | 0 | 5 | 86 | 86 |
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