
Surf Forecasts:
Thirroul surf forecast from 28 Jul 2026:
- Best quality surf: Thursday 30 Jul, 4AM (local time) - 6ft (1.9m), 9s period, SSW swell with cross-offshore winds.
- Most powerful swell: Thursday 30 Jul, 10PM (local time) - 6ft (1.9m), 11s period, S swell with 862 kJ wave energy.
- Next surfable swell (1★+): Thursday 30 Jul, 1AM (local time) - 3.5ft (1.0m), 11s 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 Thursday (Jul 30) at 1AM. The primary swell is predicted to be 1.0m and 11s period with a secondary swell of 0.1m and 7s. 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 1.9m 11s and forecast to arrive on Thursday (Jul 30) at 10PM. 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 Wednesday (Jul 29) at 7PM.
| Wave Type | Time (AEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 1AM (Thu 30th Jul) | 3.5ft (1.0m) 11s |
| Best Surf | 4AM (Thu 30th Jul) | 6ft (1.9m) 9s |
| Most Powerful | 10PM (Thu 30th Jul) | 6ft (1.9m) 11s |
Table - best surf conditions forecast for Thirroul over the next 16 days.
The Lowdown
Alright, Rusty here. Let's talk about what's coming up for our patch.
We're looking at a pretty quiet run for the next couple of weeks. There's a bit of a gap right at the start with nothing worth paddling out for until the morning of Thursday, July 30th. After that, the surf is a bit of a mixed bag, with only a few windows that look worth a look.
The first bit of energy arrives on Thursday, July 30th. At Thirroul, the morning swell comes in at 4ft from the S with a 9-second period. The combined energy is moderate (252). The wind is light from the S, making it cross, with a bit of a ripple. It's just a marginal session, probably pretty average with the tide. That afternoon the swell pushes up to 5ft from the S, but the period lengthens to 11 seconds, and the energy jumps up to moderate-strong (812). The wind turns cross-on from the SE, so it's going to be a bit choppy. Nothing to get too excited about.
Friday, July 31st, has a similar story. The morning has 6ft of S swell at 10 seconds, with moderate-strong energy (722). The wind is cross-on from the S, making it a bit lumpy. It's a marginal day at best. The afternoon drops off and turns poor.
Now, the standouts. The best of the window looks like Saturday, August 1st, and Sunday, August 2nd. Saturday morning the rain clears and we get a glassy session. The swell is 5ft from the SSE, 10-second period, with moderate-strong energy (480). The water temp is 66°, which feels a touch warmer than normal for this time of year, so it's a bit of a pleasant surprise. The wind is dead calm, making it glassy. This is a solid, clean option for intermediate surfers. Saturday afternoon the wind shifts and trashes it, so get on it early.
Sunday morning, August 2nd, is another good one. The swell is a touch smaller at 4ft from the SSE, but the period holds at 10 seconds, and the energy is still moderate (291). The wind is cross-off from the NNW, so it's going to be clean. That afternoon it stays clean with 3ft from the SSE and a longer 11-second period, making it a nice, long, drawn-out session. This is the best quality on offer—clean, reasonably consistent, and with a slight offshore feel.
After that, the swell drops off fast. Monday, August 3rd, has some small, surfable waves but nothing special. The rest of the first week and into the second week is a poor run of onshore or cross-shore wind and choppy conditions. There's a pulse of bigger swell around August 7th (Friday), with 8ft from the SSE and very strong energy (1561), but it's accompanied by a strong cross-onshore ENE wind, making it a messy, choppy mess. Not a paddle session.
The following week is flat and poor. The forecast is a bit more uncertain that far out, but it doesn't look promising. There are a few clean moments with tiny waves, but nothing worth a proper session.
Rusty, signing off.
Short Range ForecastMostly dry. Warm (max 20°C on Tue afternoon, min 6°C on Wed night). Wind will be generally light. | Days 5-7 Weather SummaryLight rain (total 3mm), mostly falling on Fri night. Warm (max 20°C on Sun morning, min 10°C on Fri night). Wind will be generally light. | |||||||||||||||||||
Tue 28 | Wednesday 29 | Thursday 30 | Friday 31 | Saturday 1 | Sunday 2 | Monday 3 | ||||||||||||||
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 9 | S 8 | SE 13 | S 16 | S 11 | S 9 | S 11 | S 11 | S 10 | S 10 | S 10 | SSE 10 | SSE 10 | SSE 10 | SSE 10 | SSE 11 | SE 10 | SE 10 | SE 10 | SE 9 |
Wave Graph | ||||||||||||||||||||
14 | 8 | 7 | 7 | 250 | 247 | 466 | 762 | 720 | 561 | 489 | 391 | 386 | 298 | 283 | 234 | 154 | 79 | 45 | 22 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | cross-off | cross-off | cross-off | cross-off | cross | cross-on | cross-off | cross-on | cross-on | cross-off | glassy | cross-on | cross-off | cross-off | cross-off | off | cross-off | glassy | cross |
High Tide | 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 | 10:38AM1.21m | 10:31PM1.41m | 11:18AM1.25m | 11:13PM1.31m | |||||||
Low Tide | 2:20AM0.20m | 1:39PM0.36m | 2:54AM0.16m | 2:18PM0.34m | 3:26AM0.14m | 2:57PM0.34m | 3:57AM0.13m | 3:38PM0.35m | 4:29AM0.14m | 4:22PM0.36m | 5:02AM0.16m | 5:11PM0.39m | ||||||||
— | — | 6:52 | — | — | 6:50 | — | — | 6:50 | — | — | 6:50 | — | — | 6:48 | — | — | 6:48 | — | — | |
5:12 | — | — | 5:13 | — | — | 5:13 | — | — | 5:14 | — | — | 5:15 | — | — | 5:15 | — | — | 5:15 | — | |
mm | — | — | — | — | — | — | — | — | — | — | 1 | 1 | — | — | — | — | — | 1 | — | — |
Temp °C | 20 | 12 | 16 | 15 | 9 | 14 | 14 | 10 | 14 | 14 | 11 | 15 | 16 | 11 | 20 | 20 | 14 | 17 | 19 | 11 |
Feels °C | 17 | 9 | 8 | 8 | 4 | 10 | 9 | 7 | 10 | 10 | 9 | 13 | 12 | 8 | 16 | 17 | 11 | 14 | 16 | 6 |
Swell 1 Height (m) Direction Period (s) | S 9 | S 8 | NNE 4 | SE 13 | S 11 | S 9 | S 11 | S 11 | S 10 | S 10 | S 10 | SSE 10 | SSE 10 | SSE 10 | SSE 10 | SSE 11 | SE 10 | SE 10 | SE 10 | SE 9 |
14 | 5 | 1 | 7 | 250 | 247 | 466 | 762 | 720 | 561 | 489 | 391 | 386 | 298 | 283 | 234 | 154 | 79 | 45 | 22 | |
Swell 2 Height (m) Direction Period (s) | SE 7 | SE 14 | SE 13 | S 8 | E 7 | NE 6 | NE 6 | — | NE 7 | NE 7 | NE 7 | SE 13 | ENE 7 | NE 7 | NE 6 | NE 9 | NE 5 | NE 6 | NE 6 | NE 5 |
7 | 8 | 7 | 1 | 1 | 2 | 1 | — | 2 | 2 | 2 | 83 | 5 | 2 | 2 | 3 | 11 | 15 | 11 | 4 | |
Swell 3 Height (m) Direction Period (s) | SE 15 | SE 6 | S 7 | S 16 | E 13 | E 12 | E 12 | — | — | E 13 | ENE 7 | ENE 8 | — | E 12 | E 18 | E 17 | NE 8 | E 16 | ENE 7 | SE 14 |
8 | 2 | 1 | 5 | 3 | 3 | 3 | — | — | 3 | 5 | 6 | — | 3 | 6 | 6 | 3 | 5 | 5 | 7 | |
Wind waves Height (m) Direction Period (s) | NNE 4 | NW 3 | — | WSW 3 | WSW 4 | — | S 9 | — | — | — | SW 2 | — | — | ENE 4 | NNW 2 | NE 4 | NW 3 | NW 3 | — | WSW 3 |
2 | 2 | — | 9 | 2 | — | 342 | — | — | — | 1 | — | — | 11 | 1 | 10 | 2 | 2 | — | 3 | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 70 | 212 | 656 | 348 | 0 | 5 | 67 | 0 | 5 | 83 | 0 | 0 | 51 | 0 | 0 | 0 | 0 | 0 | 0 | 39 |
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.










