Surf Forecasts:
Thirroul surf forecast from 30 Jul 2026:
- Best quality surf: Thursday 30 Jul, 10PM (local time) - 6ft (1.9m), 10s period, S swell with cross-offshore winds.
- Most powerful swell: Thursday 30 Jul, 7PM (local time) - 7ft (2.2m), 11s period, S swell with 1,109 kJ wave energy.
- Next surfable swell (1★+): Thursday 30 Jul, 10PM (local time) - 6ft (1.9m), 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 Thursday (Jul 30) at 10PM. The primary swell is predicted to be 1.9m and 10s period. 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 2.2m 11s and forecast to arrive on Thursday (Jul 30) at 7PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 3s period and expected on Sunday (Aug 02) at 1PM.
| Wave Type | Time (AEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 10PM (Thu 30th Jul) | 6ft (1.9m) 10s |
| Best Surf | 10PM (Thu 30th Jul) | 6ft (1.9m) 10s |
| Most Powerful | 7PM (Thu 30th Jul) | 7ft (2.2m) 11s |
Table - best surf conditions forecast for Thirroul over the next 16 days.
The Lowdown
Alright, Rusty here with the outlook for Thirroul.
Water temp is around 66°, which is a touch warmer than usual for the season – feels good on the skin.
First few days are a bit rough. Thursday the 30th of July has a 1.5m S swell with cross-shore breeze and weak energy. Nothing worth rushing for. Friday the 31st is much the same, with a bumpy 1.6m S swell.
The first real standout is Saturday morning, the 1st of August. The wind goes glassy, and there’s a clean 1.5m SSE swell. Moderate energy with zero wind means smooth, clean lines. This is the session to paddle out. A fairly consistent break, but expect some company sometimes.
Sunday the 2nd of August morning is even better. A 1.5m SE groundswell with a long 12-second period, packing solid energy. Light cross-off wind from the NNW will keep it clean. That’s the pick of the first week.
Then the surf dries up. Monday the 3rd through Thursday the 7th of August is all small and messy – mostly under 1.2m. A proper gap.
Next highlight is Saturday morning, the 8th of August. Glassy conditions again with a solid 1.6m S swell. The period is short at 8 seconds, so it’ll be steeper, but clean and fun for the crew that’s keen.
Into the second week, Monday the 10th of August afternoon stands out with a clean 1.4m ESE groundswell, 12-second period, and clean offshore wind. Thursday the 13th and Friday the 14th of August mornings also have good sized S swell, though Friday gets windy.
Best bets are Saturday the 1st and Sunday the 2nd of August mornings for glassy, clean waves. Long range, circle Monday the 10th of August afternoon and that glassy Friday the 14th of August session. The quiet spells in between are just part of the winter rhythm.
Rusty
Short Range ForecastMostly dry. Very mild (max 15°C on Fri morning, min 9°C on Thu night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 22°C on Mon morning, min 8°C on Tue night). Wind will be generally light. | ||||||||||||||||||||
Thursday 30 | Friday 31 | Saturday 1 | Sunday 2 | Monday 3 | Tuesday 4 | Wednesday 5 | |||||||||||||||
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 9 | S 11 | S 10 | S 10 | S 9 | S 9 | SSE 9 | SSE 9 | SE 13 | SE 12 | SE 12 | SE 11 | SE 11 | SE 11 | SE 10 | SE 10 | S 7 | S 10 | S 8 | S 8 | S 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 335 | 524 | 653 | 479 | 700 | 449 | 337 | 257 | 905 | 625 | 497 | 308 | 134 | 112 | 28 | 16 | 27 | 31 | 120 | 165 | 165 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-on | cross-off | cross | cross-on | cross-off | glassy | glassy | off | cross-off | cross | off | cross-off | off | cross-off | cross-off | cross-off | cross-off | glassy | cross-on | cross-off |
High Tide | 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 | 12:03PM1.29m | 00:01AM1.20m | 12:53PM1.32m | 1:01AM1.09m | ||||||||
Low Tide | 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 | 5:38AM0.20m | 6:07PM0.41m | 6:19AM0.25m | 7:13PM0.42m | ||||||||
 | |  | | | | | | | |  | | | | | | | | | |  | |
 | 6:50 | — | — | 6:50 | — | — | 6:50 | — | — | 6:48 | — | — | 6:48 | — | — | 6:47 | — | — | 6:46 | — | — |
 | — | 5:13 | — | — | 5:14 | — | — | 5:15 | — | — | 5:15 | — | — | 5:15 | — | — | 5:16 | — | — | 5:17 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 14 | 14 | 10 | 15 | 14 | 11 | 14 | 14 | 12 | 18 | 17 | 14 | 22 | 21 | 13 | 18 | 17 | 12 | 15 | 15 | 10 |
Feels °C | 9 | 9 | 7 | 11 | 10 | 9 | 13 | 13 | 10 | 14 | 13 | 12 | 18 | 17 | 10 | 12 | 11 | 6 | 12 | 12 | 7 |
Swell 1 Height (m) Direction Period (s) | S 9 | S 11 | S 10 | S 10 | S 10 | S 9 | SSE 9 | SSE 9 | SE 13 | SE 12 | SE 12 | SE 11 | SE 11 | SE 11 | SE 10 | SE 10 | S 7 | S 7 | S 8 | S 8 | S 8 |
| kJ | 335 | 524 | 653 | 479 | 527 | 449 | 337 | 257 | 905 | 625 | 497 | 308 | 134 | 112 | 28 | 16 | 27 | 16 | 120 | 165 | 165 |
Swell 2 Height (m) Direction Period (s) | NE 6 | NE 6 | — | NE 7 | NE 7 | NE 7 | NE 8 | SE 12 | NE 7 | E 18 | E 17 | NE 5 | NE 5 | E 16 | ESE 7 | ESE 7 | SSE 10 | S 10 | E 10 | E 10 | E 9 |
| kJ | 2 | 1 | — | 2 | 2 | 2 | 2 | 122 | 2 | 6 | 6 | 14 | 3 | 5 | 5 | 5 | 10 | 31 | 7 | 16 | 14 |
Swell 3 Height (m) Direction Period (s) | E 12 | E 12 | — | E 13 | E 13 | E 12 | E 12 | NE 7 | E 18 | S 21 | S 21 | E 16 | E 16 | NE 8 | ENE 5 | S 5 | E 7 | E 13 | E 13 | E 13 | E 18 |
| kJ | 3 | 3 | — | 3 | 3 | 3 | 3 | 2 | 6 | 9 | 9 | 5 | 5 | 2 | 2 | 2 | 1 | 3 | 14 | 3 | 6 |
Wind waves Height (m) Direction Period (s) | — | S 9 | — | — | S 9 | — | WSW 3 | — | NNE 4 | NNW 3 | NE 4 | — | NW 3 | N 4 | WSW 3 | WSW 3 | SW 3 | WSW 3 | — | — | — |
| kJ | — | 390 | — | — | 700 | — | 4 | — | 8 | 2 | 16 | — | 3 | 12 | 2 | 4 | 1 | 1 | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 5 | 67 | 0 | 5 | 86 | 0 | 0 | 0 | 0 | 0 | 40 | 0 | 0 | 0 | 7 | 212 | 7 | 5 | 0 | 124 | 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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