Surf Forecasts:
Thirroul surf forecast from 25 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, 7PM (local time) - 10ft (3.0m), 11s period, S swell with 1,926 kJ wave energy.
- Next surfable swell (1★+): Sunday 26 Jul, 10AM (local time) - 5ft (1.6m), 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 Sunday (Jul 26) at 10AM. The primary swell is predicted to be 1.6m and 11s period with a secondary swell of 0.1m and 8s. 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 3.0m 11s and forecast to arrive on Thursday (Jul 30) at 7PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 4s period and expected on Wednesday (Jul 29) at 4PM.
| Wave Type | Time (AEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 10AM (Sun 26th Jul) | 5ft (1.6m) 11s |
| Best Surf | 4AM (Thu 30th Jul) | 8ft (2.5m) 9s |
| Most Powerful | 7PM (Thu 30th Jul) | 10ft (3.0m) 11s |
Table - best surf conditions forecast for Thirroul over the next 16 days.
The Lowdown
Alright cobber, Rusty again, giving you the low-down for Thirroul.
The next handful of days are a bit flat, but it starts to pick up from Sunday morning the 26th. Water temp's sitting at 66°, which is a touch warmer than average for this time of year – nothing major, just a slight bump.
Sunday morning the 26th is the first decent window. Swell from the south at about 5ft, with an 11-second period and a combined energy of 598. That's moderate energy, and with a light south-west cross-offshore breeze, it's going to be clean. This is a solid, good option to get out. It's set up for intermediates, and the break faces south-east, which lines up well. But keep an eye out – crowds are sometimes around.
Things fade Sunday arvo, and Monday's pretty weak with small, ordinary waves. Tuesday the 28th is a total write-off with tiny surf. Wednesday's flat. Thursday the 30th morning brings a new south pulse at about 6ft (497 energy), but the wind stays cross-off, so it's clean and worth considering.
Then we get a bigger pulse. Thursday arvo the 30th, the swell jumps to 10ft from the south (3099 energy), but the wind goes cross-onshore and it's messy. That size is for experts only. Friday the 31st stays big, around 8ft to 7ft from the south, but it's cross-shore and choppy. Not a good time.
By Saturday the 1st of August, the swell drops back to around 6ft, with a cross-shore breeze and some chop, so it's a bit messy. Sunday the 2nd of August morning looks better with a clean 5ft south-east swell (425 energy) and a light north-west cross-off breeze. Nice and clean.
Monday the 3rd and Tuesday the 4th of August mornings both offer clean, smaller surf (around 4ft and 3ft), with glassy conditions on Tuesday. Ideal for a fun, easy session.
Now, the absolute standout. Saturday the 8th of August morning. This is the one. A solid 10ft south swell (3817 energy), with an 11-second period. The wind is glassy – dead calm. That's going to be absolutely pumping and clean. It's big though, over 8ft, so this is only for experienced surfers. The south swell matches the break perfectly. This is the pick of the whole run.
Sunday the 9th of August morning is still solid at 7ft (1324 energy), with a north-northwest cross-off breeze keeping it clean. Another good one for the experienced crew.
Monday the 10th of August morning has a solid 8ft south-southeast swell (1705 energy) with a strong west cross-off wind, so it'll be clean but powerful.
So the best on offer is without a doubt Saturday the 8th of August morning. Glassy, solid south swell, and well worth the wait.
Rusty.
Short Range ForecastMostly dry. Warm (max 20°C on Tue afternoon, min 9°C on Mon night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Very mild (max 14°C on Wed morning, min 6°C on Wed night). Mainly fresh winds. | ||||||||||||||||||||
Sunday 26 | Monday 27 | Tuesday 28 | Wednesday 29 | Thursday 30 | Friday 31 | Saturday 1 | |||||||||||||||
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 11 | S 10 | S 9 | S 9 | SSE 8 | S 8 | S 9 | S 9 | S 8 | SE 13 | S 16 | S 9 | S 9 | S 11 | S 10 | S 10 | SSE 9 | SSE 9 | SSE 10 | SSE 10 | SE 10 |
Wave Graph  | |||||||||||||||||||||
 kJ | 595 | 353 | 217 | 158 | 118 | 42 | 24 | 14 | 8 | 7 | 7 | 992 | 492 | 1829 | 1040 | 1137 | 773 | 528 | 596 | 576 | 424 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | on | cross-off | glassy | cross | off | off | glassy | cross-off | off | cross-off | cross-off | cross-off | cross-on | cross-off | cross | cross | cross-off | cross | on | off |
High Tide | 6:11PM1.42m | 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 | 11:28AM0.47m | 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 | — | — | 6:54 | — | — | 6:52 | — | — | 6:52 | — | — | 6:50 | — | — | 6:50 | — | — | 6:50 | — | — |
 | — | 5:10 | — | — | 5:10 | — | — | 5:12 | — | — | 5:13 | — | — | 5:13 | — | — | 5:14 | — | — | 5:15 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 17 | 16 | 12 | 17 | 17 | 13 | 19 | 20 | 12 | 14 | 13 | 9 | 14 | 14 | 9 | 14 | 14 | 11 | 15 | 14 | 11 |
Feels °C | 14 | 14 | 11 | 14 | 13 | 12 | 15 | 17 | 8 | 6 | 5 | 3 | 9 | 9 | 5 | 8 | 8 | 7 | 12 | 12 | 9 |
Swell 1 Height (m) Direction Period (s) | S 11 | S 10 | S 9 | S 9 | SSE 8 | S 8 | S 9 | S 9 | S 8 | NNE 4 | SE 13 | S 9 | S 9 | S 11 | S 10 | S 10 | — | SSE 9 | SSE 10 | SSE 10 | SE 10 |
| kJ | 595 | 353 | 217 | 158 | 118 | 42 | 24 | 14 | 5 | 2 | 7 | 528 | 492 | 1270 | 1040 | 767 | — | 528 | 596 | 576 | 424 |
Swell 2 Height (m) Direction Period (s) | NE 8 | NE 8 | NE 8 | NE 8 | SE 15 | NE 4 | SE 7 | SE 7 | SE 14 | S 7 | S 16 | NE 7 | NE 7 | — | — | — | — | SSE 12 | — | NE 8 | NE 8 |
| kJ | 3 | 2 | 2 | 2 | 8 | 7 | 8 | 7 | 8 | 1 | 5 | 2 | 2 | — | — | — | — | 138 | — | 2 | 3 |
Swell 3 Height (m) Direction Period (s) | — | — | SE 13 | SE 18 | NE 8 | SSE 8 | ENE 4 | SE 15 | SE 6 | SE 13 | E 6 | — | E 12 | — | — | — | — | NE 9 | S 9 | E 19 | E 18 |
| kJ | — | — | 7 | 12 | 2 | 6 | 1 | 8 | 2 | 7 | 1 | — | 3 | — | — | — | — | 3 | 6 | 7 | 6 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | NNE 4 | — | NNE 4 | WNW 3 | W 3 | SW 4 | S 9 | — | S 11 | — | S 10 | SSE 9 | — | — | — | NNE 8 |
| kJ | — | — | — | — | — | 16 | — | 3 | 3 | 4 | 22 | 992 | — | 1829 | — | 1137 | 773 | — | — | — | 7 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 94 | 0 | 0 | 58 | 0 | 7 | 10 | 212 | 348 | 415 | 5 | 0 | 39 | 0 | 5 | 86 | 0 | 27 | 36 | 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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