
Surf Forecasts:
Thirroul surf forecast from 30 Jul 2026:
- Best quality surf: Friday 31 Jul, 4AM (local time) - 7ft (2.1m), 10s period, S swell with cross-offshore winds.
- Most powerful swell: Friday 31 Jul, 4AM (local time) - 7ft (2.1m), 10s period, S swell with 847 kJ wave energy.
- Next surfable swell (1★+): Friday 31 Jul, 4AM (local time) - 7ft (2.1m), 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 31) at 4AM. The primary swell is predicted to be 2.1m and 10s period with a secondary swell of 1.8m and 10s. 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 2.1m 10s and forecast to arrive on Friday (Jul 31) 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 0.7m 4s period and expected on Sunday (Aug 02) at 1AM.
| Wave Type | Time (AEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 4AM (Fri 31st Jul) | 7ft (2.1m) 10s |
| Best Surf | 4AM (Fri 31st Jul) | 7ft (2.1m) 10s |
| Most Powerful | 4AM (Fri 31st Jul) | 7ft (2.1m) 10s |
Table - best surf conditions forecast for Thirroul over the next 16 days.
The Lowdown
Righto, let’s have a look at what’s coming up for Thirroul over the next couple of weeks.
Overall, it’s a bit of a mixed bag. There’s some decent swell on the way, but a lot of it is going to be fighting cross-shore or onshore wind. The best bet is this Sunday morning, the 2nd of August, when conditions are looking clean and the swell has some real push behind it.
Friday, 31st July kicks things off, but it’s pretty ordinary. We’ve got a 5 ft south swell at 9 seconds, combined wave energy of 464 (moderate), but the wind is a cross-shore 6 mph from the south, making it choppy. The afternoon turns cross-onshore and jumps to 7 ft, which is just messy. Not worth paddling out today.
Saturday morning, 1st August is a little glassy with a light 3 mph SSE breeze – that’s clean. Swell drops to 5 ft from the SSE at 9 seconds, combined energy 342 (moderate). It’s surfable, but not a standout. The afternoon gets 5 ft with a light cross-onshore wind, so it’s only average.
Now, Sunday morning, 2nd August – this is the pick. A 5 ft swell from the SE at a long 12 seconds, combined energy of 661 (strong). The wind is a cross-offshore 9 mph from the NNW keeping it clean. That’s proper groundswell, with good shape and power. A bit of a wait between sets, but worth the paddle out. The afternoon turns cross with a 12 mph NE wind and the swell drops to 5 ft, so morning is the go.
Monday, 3rd August drops off to 3 ft SE at 11 seconds, energy down to 175 (weak). Winds are cross-offshore in the morning, clean but tiny. Afternoon sees offshore 16 mph from the WNW, but only 2 ft – surfable but very ordinary.
From Tuesday, 4th August through to Thursday morning, 6th August, the swell goes flat or near-flat – 1.0 ft to 0.3 ft – with clean but tiny conditions. Not worth a wet suit.
Thursday morning, 6th August brings back some hope: a glassy 4 ft south swell at 9 seconds, combined energy 255 (moderate). Clean and glassy. The afternoon gets a 9 mph SE cross-onshore and goes choppy again.
Friday morning, 7th August has a 5 ft SSE swell at 9 seconds, combined energy 327 (moderate), but it’s a light cross-shore. Not great, but not terrible. Afternoon goes cross-onshore and messy.
Saturday morning, 8th August is another glassy one – 5 ft SE swell at 10 seconds, combined energy 465 (moderate). No wind at all. That’s a solid window for clean surf, though the swell isn’t massive. The afternoon turns cross-onshore and drops.
Sunday morning, 9th August looks tidy: 4 ft SE swell at 10 seconds, combined energy 263 (moderate), with a light cross-offshore NNW breeze. Clean waves. Afternoon goes cross and messy.
From Monday, 10th August onward, the swell stays small and the wind gets messy. Monday morning is 3 ft from the ESE at 11 seconds, energy 292 (moderate), with a cross-offshore N breeze. Monday afternoon picks up a 4 ft ESE swell with an offshore 9 mph from the west – clean but small. Tuesday through Friday the 14th is mostly under 3 ft, with fresh cross-shore winds creating lumpy conditions. The window’s closing.
All in all, Sunday morning, 2nd August is the absolute standout – clean, solid groundswell, strong energy. Saturday morning the 8th is also a solid call for a glassy session. The rest of the week is either small or blown out.
Rusty.
Short Range ForecastMostly dry. Very mild (max 18°C on Sun morning, min 9°C on Thu night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 21°C on Mon morning, min 9°C on Mon night). Wind will be generally light. | ||||||||||||||||||
Friday 31 | Saturday 1 | Sunday 2 | Monday 3 | Tuesday 4 | Wednesday 5 | ||||||||||||||
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 9 | S 9 | S 9 | SSE 9 | SSE 9 | SE 12 | SE 12 | SE 12 | SE 11 | SE 11 | SE 11 | SE 10 | SE 10 | S 5 | S 10 | S 10 | S 10 | S 9 |
Wave Graph | |||||||||||||||||||
1037 | 459 | 685 | 440 | 337 | 311 | 549 | 646 | 514 | 314 | 162 | 110 | 28 | 16 | 4 | 131 | 313 | 621 | 313 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross | cross-on | cross-off | glassy | cross-on | cross-off | cross-off | cross | off | cross-off | off | off | off | cross-off | cross-off | cross-off | cross | cross-off |
High Tide | 9:25AM1.12m | 9:19PM1.53m | 10:01AM1.17m | 9:54PM1.48m | 10:38AM1.21m | 10:31PM1.41m | 11:18AM1.25m | 11:13PM1.31m | 12:03PM1.29m | 00:01AM1.20m | 12:53PM1.32m | 1:01AM1.09m | |||||||
Low Tide | 3:26AM0.14m | 2:57PM0.34m | 3:57AM0.13m | 3:38PM0.35m | 4:29AM0.14m | 4:22PM0.36m | 5:02AM0.16m | 5:11PM0.39m | 5:38AM0.20m | 6:07PM0.41m | 6:19AM0.25m | 7:13PM0.42m | |||||||
— | 6:50 | — | — | 6:50 | — | — | 6:48 | — | — | 6:48 | — | — | 6:47 | — | — | 6:46 | — | — | |
— | — | 5:14 | — | — | 5:15 | — | — | 5:15 | — | — | 5:15 | — | — | 5:16 | — | — | 5:17 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 10 | 14 | 14 | 11 | 15 | 15 | 12 | 18 | 17 | 13 | 21 | 17 | 12 | 15 | 13 | 11 | 18 | 18 | 12 |
Feels °C | 6 | 10 | 10 | 8 | 13 | 13 | 10 | 14 | 12 | 11 | 17 | 12 | 9 | 8 | 6 | 5 | 14 | 15 | 8 |
Swell 1 Height (m) Direction Period (s) | S 10 | S 9 | S 9 | S 9 | SSE 9 | SSE 9 | SE 12 | SE 12 | SE 12 | SE 11 | SE 11 | SE 11 | SE 10 | SE 10 | S 5 | S 10 | S 10 | S 10 | S 9 |
653 | 459 | 505 | 440 | 337 | 311 | 549 | 646 | 514 | 314 | 162 | 110 | 28 | 16 | 2 | 131 | 313 | 621 | 313 | |
Swell 2 Height (m) Direction Period (s) | — | NE 7 | NE 7 | NE 7 | NE 8 | NE 7 | SE 14 | E 18 | E 17 | NE 5 | NE 5 | NE 5 | ESE 8 | E 7 | SE 10 | E 9 | E 9 | E 13 | E 9 |
— | 2 | 2 | 2 | 2 | 2 | 132 | 6 | 6 | 14 | 8 | 4 | 11 | 4 | 4 | 7 | 6 | 14 | 2 | |
Swell 3 Height (m) Direction Period (s) | — | E 13 | E 13 | E 12 | E 13 | E 12 | NE 7 | S 21 | S 22 | E 16 | E 16 | E 16 | NE 5 | E 15 | E 7 | NE 9 | E 13 | E 18 | E 12 |
— | 3 | 3 | 3 | 3 | 3 | 2 | 9 | 9 | 5 | 5 | 5 | 1 | 4 | 1 | 3 | 3 | 6 | 3 | |
Wind waves Height (m) Direction Period (s) | S 10 | — | S 9 | — | — | — | NNE 4 | N 3 | NE 4 | — | NW 3 | NW 3 | W 3 | SW 4 | WSW 3 | W 4 | WSW 3 | — | — |
1037 | — | 685 | — | — | — | 13 | 2 | 14 | — | 2 | 2 | 1 | 15 | 5 | 9 | 1 | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 0 | 5 | 86 | 0 | 0 | 40 | 0 | 0 | 40 | 0 | 0 | 0 | 0 | 151 | 100 | 2 | 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.











