Surf Forecasts:
Thirroul surf forecast from 16 Jul 2026:
- Best quality surf: Sunday 19 Jul, 7PM (local time) - 5ft (1.6m), 11s period, ENE swell with glassy winds.
- Most powerful swell: Sunday 19 Jul, 4PM (local time) - 5ft (1.6m), 11s period, ENE swell with 561 kJ wave energy.
- Next surfable swell (1★+): Friday 17 Jul, 10PM (local time) - 1.5ft (0.5m), 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 (Jul 17) at 10PM. The primary swell is predicted to be 0.5m and 10s period with a secondary swell of 0.6m and 7s. Another secondary swell of 0.6m and 5s 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 Sunday (Jul 19) at 4PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 4s period and expected on Tuesday (Jul 21) at 1AM.
| Wave Type | Time (AEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 10PM (Fri 17th Jul) | 1.5ft (0.5m) 10s |
| Best Surf | 7PM (Sun 19th Jul) | 5ft (1.6m) 11s |
| Most Powerful | 4PM (Sun 19th Jul) | 5ft (1.6m) 11s |
Table - best surf conditions forecast for Thirroul over the next 16 days.
The Lowdown
Alright, Rusty here again. Let’s break down the next couple weeks in feet and miles per hour.
The first few days are a total bust. From Thursday the 16th through Saturday the 19th morning, it’s all onshore trash—short-period slop and choppy conditions. Don’t bother.
Sunday the 19th morning finally sees the wind glass off. Swell is from the ENE at 5ft with a 10-second period, and the combined energy is solid (467). Water temp is about 64°, right where it should be for this time of year. That’s a real morning session to get in the water.
Monday the 20th morning is another good look at Thirroul (beach and reef). You’ve got a clean 5ft ENE swell, 10-second period, and a light cross-offshore wind from the NNW. The energy is strong (577). The break is fairly consistent, though crowds can pop up sometimes.
Tuesday the 21st morning is glassy again with 4ft ENE swell, but the energy drops a bit (373). Still a decent option if you missed the Monday window.
The big one—the one you want to plan around—is Friday the 24th morning. A powerful S swell comes in at 8ft, 10-second period, and a massive 1556 combined energy. Winds are clean and cross-offshore from the SW. This is expert-level stuff, with powerful, well-formed waves. It’s going to be too big for beginners. The south direction is perfect for this spot.
Monday the 27th morning offers another strong session with 6ft S swell (643 energy) and clean cross-offshore winds from the NW. Solid follow-up.
Friday the 31st morning shows another spike: 7ft S swell (950 energy) with clean north winds. That’s further out, so keep an eye on it, but the potential is there.
So, the weekend of the 19th-20th is your warm-up. The standout is Friday the 24th for experienced crew looking for some real push. Second week has some good pulses too, but treat those as promising rather than locked in.
Rusty.
Short Range ForecastLight rain (total 3mm), mostly falling on Thu night. Very mild (max 16°C on Sat morning, min 10°C on Sat night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 21°C on Wed morning, min 9°C on Sun night). Wind will be generally light. | |||||||||||||||||||
Thu 16 | Friday 17 | Saturday 18 | Sunday 19 | Monday 20 | Tuesday 21 | Wednesday 22 | ||||||||||||||
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 7 | SSE 6 | S 6 | S 5 | S 10 | S 10 | E 7 | ENE 8 | ENE 10 | ENE 11 | ENE 10 | ENE 10 | ENE 10 | ENE 10 | ENE 10 | ENE 10 | ENE 10 | ENE 10 | ENE 9 | ENE 9 |
Wave Graph  | ||||||||||||||||||||
 kJ | 311 | 172 | 101 | 43 | 71 | 46 | 47 | 96 | 400 | 561 | 510 | 451 | 442 | 402 | 331 | 263 | 218 | 172 | 168 | 133 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross | cross | cross-on | cross | cross-on | cross-on | cross-off | glassy | on | off | cross-off | cross | cross-off | glassy | cross-on | off | off | cross-on | off |
High Tide | 9:44PM1.74m | 10:35AM1.20m | 10:31PM1.62m | 11:23AM1.22m | 11:18PM1.47m | 12:12PM1.24m | 00:06AM1.30m | 1:01PM1.26m | 00:57AM1.14m | 1:53PM1.27m | 1:54AM1.01m | 2:46PM1.28m | 3:00AM0.92m | |||||||
Low Tide | 4:30AM-0.03m | 4:10PM0.28m | 5:13AM0.04m | 5:05PM0.33m | 5:54AM0.13m | 6:03PM0.40m | 6:34AM0.22m | 7:05PM0.46m | 7:14AM0.31m | 8:15PM0.49m | 7:57AM0.39m | 9:28PM0.50m | ||||||||
 |  |  | |  | | | |  | |  | | | | | | | | | | |
 | — | — | 6:58 | — | — | 6:58 | — | — | 6:58 | — | — | 6:58 | — | — | 6:56 | — | — | 6:56 | — | — |
 | 5:04 | — | — | 5:05 | — | — | 5:05 | — | — | 5:06 | — | — | 5:07 | — | — | 5:07 | — | — | 5:07 | — |
mm | — | 2 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 15 | 14 | 14 | 15 | 13 | 16 | 15 | 14 | 16 | 15 | 12 | 17 | 17 | 12 | 15 | 15 | 12 | 21 | 19 | 14 |
Feels °C | 10 | 10 | 11 | 12 | 12 | 14 | 13 | 13 | 15 | 14 | 11 | 14 | 14 | 10 | 13 | 14 | 10 | 20 | 17 | 12 |
Swell 1 Height (m) Direction Period (s) | S 18 | SSE 19 | E 5 | E 5 | S 10 | E 7 | E 7 | ENE 8 | ENE 10 | ENE 11 | ENE 10 | ENE 10 | ENE 10 | ENE 10 | ENE 10 | ENE 10 | ENE 10 | ENE 10 | ENE 9 | ENE 9 |
| kJ | 25 | 34 | 9 | 14 | 71 | 45 | 47 | 96 | 400 | 561 | 510 | 451 | 442 | 402 | 331 | 263 | 218 | 172 | 168 | 133 |
Swell 2 Height (m) Direction Period (s) | S 13 | S 12 | E 8 | ENE 7 | E 7 | S 10 | S 9 | S 8 | SSE 17 | S 16 | S 12 | S 12 | S 12 | S 11 | S 10 | S 10 | S 10 | S 10 | S 9 | S 10 |
| kJ | 14 | 24 | 5 | 11 | 39 | 46 | 27 | 22 | 57 | 124 | 112 | 103 | 96 | 57 | 35 | 31 | 17 | 16 | 15 | 9 |
Swell 3 Height (m) Direction Period (s) | E 11 | E 8 | SE 15 | S 8 | S 21 | SSE 21 | SSE 20 | SSE 18 | S 8 | SE 16 | SE 16 | SSE 15 | SE 15 | SE 14 | SE 14 | SE 13 | SE 13 | SE 13 | SE 12 | SE 12 |
| kJ | 2 | 1 | 9 | 12 | 9 | 42 | 39 | 64 | 10 | 11 | 10 | 23 | 8 | 8 | 7 | 7 | 7 | 7 | 6 | 6 |
Wind waves Height (m) Direction Period (s) | S 7 | SSE 6 | S 6 | S 5 | — | SSW 3 | SSE 3 | — | — | — | — | N 3 | N 3 | N 4 | — | — | — | — | NE 3 | — |
| kJ | 311 | 172 | 101 | 43 | — | 4 | 2 | — | — | — | — | 4 | 1 | 28 | — | — | — | — | 6 | — |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 177 | 39 | 67 | 53 | 2 | 5 | 5 | 0 | 0 | 36 | 0 | 0 | 2 | 0 | 0 | 98 | 0 | 0 | 6 | 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.
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