Surf Forecasts:
Thirroul surf forecast from 13 Jul 2026:
- Best quality surf: Wednesday 15 Jul, 7AM (local time) - 8ft (2.5m), 9s period, S swell with cross-offshore winds.
- Most powerful swell: Wednesday 15 Jul, 10AM (local time) - 10ft (3.0m), 10s period, S swell with 1,948 kJ wave energy.
- Next surfable swell (1★+): Wednesday 15 Jul, 4AM (local time) - 3ft (0.9m), 6s period with SSW 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 Wednesday (Jul 15) at 4AM. The primary swell is predicted to be 0.9m and 6s period with a secondary swell of 0.4m and 10s. Another secondary swell of 0.1m and 10s is also forecast. 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 10s and forecast to arrive on Wednesday (Jul 15) at 10AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.8m 4s period and expected on Tuesday (Jul 14) at 10PM.
| Wave Type | Time (AEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 4AM (Wed 15th Jul) | 3ft (0.9m) 6s |
| Best Surf | 7AM (Wed 15th Jul) | 8ft (2.5m) 9s |
| Most Powerful | 10AM (Wed 15th Jul) | 10ft (3.0m) 10s |
Table - best surf conditions forecast for Thirroul over the next 16 days.
The Lowdown
Alright, Rusty here. Let's have a look at the 16-day picture for Thirroul. It's a beach and reef setup, and it's exposed to the SE swell. The water temp is about average for this time of year, nothing unusual to report.
Honestly, the first week is a write-off. We've got a lot of small, weak, and messy surf with poor conditions. The only real standout is a brief pulse on Wednesday the 15th. A solid 10ft south swell rolls in Wednesday morning, but the wind is a messy cross-shore. The combined energy is a thumping 3228, so there's juice, but the wind will make it a challenge. It's big enough for experts only, and the 10-second period is a bit short and raw. By Wednesday afternoon, it's dropping to 6ft with a cross-onshore chop, no good.
After that, it's a long gap of nothing. From Thursday the 16th all the way through to Sunday the 20th, it's a mix of tiny, weak, and onshore slop. The swell is small, the energy is low (under 500), and the wind is just wrong. Not worth paddling out for.
The second week starts to look a bit more promising. It's not pumping, but the conditions get cleaner. The real standout in the whole 16-day window is the period from the 21st of July right through to the 25th. We get a consistent 3ft to 5ft east-northeast swell with a 10-second period. The energy is low to moderate, but the winds turn offshore or go glassy. On the 21st, Tuesday morning, it's clean with a light WNW offshore. The 23rd and 24th in particular look tidy, with clean offshore winds and even a glassy Friday afternoon. The 24th is the pick of the lot: 4ft east swell, glassy conditions, and a light breeze. That's your window for a clean, fun, longboardable wave. The swell direction is from the east, which is fine for this spot.
The crowds at Thirroul can be a factor sometimes, so for that clean glassy Friday afternoon, you might have some company, but it's worth it for the conditions.
Things fade out again from the 26th, with onshore winds and a strong SSE wind change on the 27th and 28th that just messes everything up. The 29th is a write-off too.
So, bottom line: the first week is a bust. The best bet is the run from the 21st to the 25th, with the standout being the 24th of July. Clean, glassy, and surfable for all levels.
Rusty.
Short Range ForecastMostly dry. Very mild (max 18°C on Tue morning, min 9°C on Mon night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Very mild (max 16°C on Sun afternoon, min 12°C on Thu night). Wind will be generally light. | ||||||||||||||||||||
Tuesday 14 | Wednesday 15 | Thursday 16 | Friday 17 | Saturday 18 | Sunday 19 | Mon 20 | |||||||||||||||
Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | |
Swell Height Map |  |  |  |  |  |  |  |  | |||||||||||||
Wave Height (m) Direction Period (s) | S 7 | S 16 | S 11 | S 11 | S 10 | S 9 | S 8 | S 8 | S 8 | SSE 6 | SSE 5 | S 5 | S 10 | S 10 | S 10 | E 8 | ENE 10 | ENE 10 | ENE 10 | ENE 10 | ENE 10 |
Wave Graph  | |||||||||||||||||||||
 kJ | 4 | 5 | 10 | 20 | 1948 | 432 | 362 | 317 | 300 | 153 | 74 | 58 | 122 | 65 | 52 | 161 | 328 | 378 | 399 | 416 | 363 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | off | off | cross-off | cross | cross-on | cross-off | cross | cross-on | cross | cross | cross-on | cross | cross | cross-on | cross-off | cross | cross-on | on | cross-on | cross-on |
High Tide | 8:06AM1.12m | 8:05PM1.81m | 8:57AM1.15m | 8:55PM1.80m | 9:47AM1.18m | 9:44PM1.74m | 10:35AM1.20m | 10:31PM1.62m | 11:23AM1.22m | 11:18PM1.47m | 12:12PM1.24m | 00:06AM1.30m | 1:01PM1.26m | ||||||||
Low Tide | 2:07AM-0.03m | 1:31PM0.24m | 2:57AM-0.07m | 2:25PM0.23m | 3:45AM-0.07m | 3:17PM0.24m | 4:30AM-0.03m | 4:10PM0.28m | 5:13AM0.04m | 5:05PM0.33m | 5:54AM0.13m | 6:03PM0.40m | 6:34AM0.22m | ||||||||
 |  | | |  | | | | |  | | | | | | | | | | | | |
 | — | 7:00 | — | — | 7:00 | — | — | 7:00 | — | — | 6:58 | — | — | 6:58 | — | — | 6:58 | — | — | 6:58 | — |
 | — | — | 5:02 | — | — | 5:04 | — | — | 5:04 | — | — | 5:05 | — | — | 5:05 | — | — | 5:06 | — | — | 5:07 |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 12 | 18 | 17 | 14 | 15 | 14 | 11 | 16 | 15 | 13 | 15 | 15 | 13 | 15 | 15 | 13 | 15 | 16 | 15 | 17 | 17 |
Feels °C | 8 | 12 | 11 | 8 | 10 | 9 | 7 | 10 | 10 | 10 | 12 | 12 | 11 | 11 | 12 | 10 | 12 | 13 | 13 | 15 | 15 |
Swell 1 Height (m) Direction Period (s) | S 7 | S 7 | S 11 | S 11 | S 10 | S 15 | SSE 7 | S 14 | S 17 | S 17 | S 8 | ESE 5 | S 10 | E 7 | E 6 | E 8 | ENE 10 | ENE 10 | ENE 10 | ENE 10 | ENE 10 |
| kJ | 4 | 1 | 10 | 20 | 1280 | 5 | 228 | 16 | 6 | 6 | 35 | 9 | 122 | 43 | 52 | 161 | 328 | 378 | 399 | 416 | 363 |
Swell 2 Height (m) Direction Period (s) | E 8 | S 10 | S 6 | E 10 | — | — | E 11 | — | S 17 | E 11 | S 16 | ENE 7 | E 7 | S 10 | S 10 | S 9 | SSE 9 | SSE 9 | SSE 13 | S 12 | S 12 |
| kJ | 1 | 2 | 1 | 2 | — | — | 2 | — | 23 | 2 | 5 | 5 | 32 | 65 | 47 | 42 | 27 | 28 | 57 | 75 | 72 |
Swell 3 Height (m) Direction Period (s) | S 11 | S 16 | S 18 | — | — | — | — | — | E 11 | E 11 | E 7 | ENE 7 | S 23 | S 21 | S 19 | SSE 19 | SSE 18 | SSE 16 | S 9 | SE 15 | SE 14 |
| kJ | 2 | 5 | 6 | — | — | — | — | — | 2 | 2 | 4 | 9 | 10 | 9 | 7 | 36 | 61 | 52 | 14 | 34 | 33 |
Wind waves Height (m) Direction Period (s) | NW 2 | NW 3 | W 3 | SSW 6 | S 10 | S 9 | S 8 | S 8 | S 8 | SSE 6 | SSE 5 | S 5 | — | SSE 4 | S 4 | — | — | — | — | — | — |
| kJ | 1 | 2 | 5 | 29 | 1948 | 432 | 362 | 317 | 300 | 153 | 74 | 58 | — | 16 | 6 | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 348 | 348 | 280 | 2 | 5 | 79 | 0 | 39 | 86 | 5 | 74 | 7 | 5 | 38 | 27 | 0 | 11 | 5 | 27 | 25 | 6 |
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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