
Surf Forecasts:
Thirroul surf forecast from 26 Jul 2026:
- Best quality surf: Thursday 30 Jul, 4AM (local time) - 8ft (2.5m), 9s period, S swell with cross-offshore winds.
- Most powerful swell: Thursday 30 Jul, 4AM (local time) - 8ft (2.5m), 9s period, S swell with 1,064 kJ wave energy.
- Next surfable swell (1★+): Monday 27 Jul, 7AM (local time) - 3.5ft (1.0m), 9s 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 Monday (Jul 27) at 7AM. The primary swell is predicted to be 1.0m and 9s period with a secondary swell of 0.1m and 8s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Thirroul in the next 16 days are 2.5m 9s 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 0.6m 4s period and expected on Wednesday (Jul 29) at 4PM.
| Wave Type | Time (AEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 7AM (Mon 27th Jul) | 3.5ft (1.0m) 9s |
| Best Surf | 4AM (Thu 30th Jul) | 8ft (2.5m) 9s |
| Most Powerful | 4AM (Thu 30th Jul) | 8ft (2.5m) 9s |
Table - best surf conditions forecast for Thirroul over the next 16 days.
The Lowdown
Alright, this is Rusty comin' at ya from the desk, lookin' at the charts for the next couple of weeks. It's a bit of a mixed bag for our stretch of coast, but there's a couple of sessions that have got me stoked, so let's get into it.
Right off the bat, we've got a few days of small stuff. Monday the 27th of July has some 3ft south swell rollin' in, but it's short period and the energy is weak (172). The morning is glassy though, which is a treat, but the waves are just too ordinary to get excited about. Tuesday and Wednesday are even smaller, with hardly any energy. It's gonna be a flat spell, so save your wax.
Now, Thursday the 30th of July is where it starts to get interesting. We're lookin' at a solid 7ft southerly swell swingin' in, with a massive jump in energy to 1097. That's a lot of power. The wind is offshore and light, so *Thirroul* is gonna be clean. This is proper size, over 8ft territory, so this is for the experienced crew only. Beginners, stay on the sand for this one. The morning is the call, as the afternoon gets a bit messy with a cross-onshore wind.
Friday the 31st of July is still a good one. The swell drops to 5ft from the south, but it's still got plenty of power (502) and we're lookin' at glassy conditions again in the morning. That's a beautiful window for intermediate surfers to get a piece of it. The water temp is about average for this time of year, so no wetsuit surprises.
The first weekend of August is a bit of a letdown. Saturday the 1st and Sunday the 2nd see the swell drop back and the wind gets messy. It's surfable, but it's not a standout.
Lookin' further ahead, Tuesday the 4th of August has another pulse. We're talkin' a 7ft south swell with powerful energy (1295) and clean conditions from a cross-offshore wind. The morning is bigger and might be a bit tricky, but the afternoon drops to a still-strong 5ft and is clean. This is another one for the experienced surfers who can handle the grunt.
Then, the real highlight of the whole outlook is Saturday the 8th of August. Get this in your diary. We've got a solid 7ft swell from the SSE, but with a period of 12 seconds, that's a proper groundswell. The energy is through the roof at 1355, and the wind is glassy in the morning. This is a dream scenario for *Thirroul*. The swell direction from the SSE is a good match for the break, and with conditions like that, it's the best on offer. The afternoon gets a bit lumpy with a cross-onshore, so the early session is the winner.
Sunday the 9th and beyond, the swell fades again and the energy drops off. There's nothing else that really jumps out, so make the most of that Saturday morning.
Alright, that's the long and short of it. The big call is definitely Saturday the 8th of August for a bomber session, and Thursday the 30th of July as a close second. The rest is a bit of a wait-and-see.
Rusty.
Short Range ForecastMostly dry. Warm (max 20°C on Tue afternoon, min 9°C on Tue night). Wind will be generally light. | Days 5-7 Weather SummarySome drizzle, heaviest during Sat morning. Very mild (max 15°C on Fri morning, min 7°C on Wed night). Wind will be generally light. | ||||||||||||||||||
Monday 27 | Tuesday 28 | Wednesday 29 | Thursday 30 | Friday 31 | Saturday 1 | ||||||||||||||
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 9 | S 9 | SSE 8 | S 8 | S 7 | S 9 | S 8 | SE 13 | S 16 | S 11 | S 9 | S 11 | S 11 | S 10 | S 10 | SSE 9 | SSE 9 | SSE 9 | SSE 9 |
Wave Graph | |||||||||||||||||||
212 | 158 | 118 | 43 | 16 | 14 | 8 | 7 | 7 | 459 | 766 | 878 | 734 | 499 | 432 | 283 | 238 | 248 | 193 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | glassy | cross | off | off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-on | off | glassy | cross-on | cross-off | cross | cross | off |
High Tide | 6:56AM0.95m | 6:53PM1.48m | 7:36AM0.99m | 7:32PM1.52m | 8:13AM1.04m | 8:08PM1.55m | 8:49AM1.08m | 8:44PM1.56m | 9:25AM1.12m | 9:19PM1.53m | 10:01AM1.17m | 9:54PM1.48m | |||||||
Low Tide | 1:07AM0.30m | 12:15PM0.43m | 1:45AM0.24m | 12:58PM0.40m | 2:20AM0.20m | 1:39PM0.36m | 2:54AM0.16m | 2:18PM0.34m | 3:26AM0.14m | 2:57PM0.34m | 3:57AM0.13m | 3:38PM0.35m | |||||||
— | 6:54 | — | — | 6:52 | — | — | 6:52 | — | — | 6:50 | — | — | 6:50 | — | — | 6:50 | — | — | |
— | — | 5:10 | — | — | 5:12 | — | — | 5:13 | — | — | 5:13 | — | — | 5:14 | — | — | 5:15 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | — | — |
Temp °C | 12 | 16 | 16 | 12 | 19 | 20 | 13 | 16 | 13 | 10 | 14 | 13 | 10 | 15 | 14 | 11 | 12 | 13 | 13 |
Feels °C | 10 | 13 | 13 | 10 | 15 | 17 | 9 | 9 | 6 | 3 | 9 | 8 | 6 | 11 | 9 | 7 | 9 | 12 | 13 |
Swell 1 Height (m) Direction Period (s) | S 9 | S 9 | SSE 8 | S 8 | S 7 | S 9 | S 8 | NNE 4 | SE 13 | S 11 | S 8 | S 11 | S 11 | S 10 | S 10 | SSE 9 | SSE 9 | SSE 9 | SSE 9 |
212 | 158 | 118 | 43 | 16 | 14 | 5 | 1 | 7 | 459 | 324 | 878 | 734 | 499 | 432 | 283 | 238 | 248 | 193 | |
Swell 2 Height (m) Direction Period (s) | NE 8 | NE 8 | SE 15 | NE 4 | SE 7 | SE 7 | SE 14 | S 7 | S 16 | ENE 7 | ENE 7 | NE 6 | NE 6 | E 13 | E 13 | NE 11 | NE 8 | NE 8 | NE 7 |
2 | 2 | 8 | 5 | 8 | 7 | 8 | 1 | 5 | 5 | 4 | 2 | 1 | 3 | 3 | 5 | 3 | 2 | 2 | |
Swell 3 Height (m) Direction Period (s) | S 14 | SE 18 | NE 8 | SE 7 | NE 4 | SE 15 | SE 6 | SE 13 | E 8 | E 13 | E 12 | — | — | — | E 13 | E 13 | E 12 | E 12 | E 18 |
4 | 12 | 2 | 14 | 3 | 8 | 2 | 7 | 1 | 3 | 3 | — | — | — | 3 | 3 | 3 | 3 | 6 | |
Wind waves Height (m) Direction Period (s) | — | — | — | NW 2 | — | NNE 4 | WNW 3 | W 2 | SW 4 | WSW 3 | S 9 | — | — | — | — | — | — | — | — |
— | — | — | 1 | — | 1 | 3 | 1 | 10 | 4 | 766 | — | — | — | — | — | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 0 | 0 | 21 | 0 | 68 | 139 | 212 | 338 | 268 | 2 | 0 | 39 | 0 | 0 | 118 | 5 | 2 | 2 | 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.










