Surf Forecasts:
Thirroul surf forecast from 13 Jul 2026:
- Best quality surf: Wednesday 15 Jul, 7AM (local time) - 7ft (2.1m), 9s period, S swell with cross-offshore winds.
- Most powerful swell: Wednesday 15 Jul, 7AM (local time) - 7ft (2.1m), 9s period, S swell with 766 kJ wave energy.
- Next surfable swell (1★+): Wednesday 15 Jul, 4AM (local time) - 2ft (0.6m), 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 Wednesday (Jul 15) at 4AM. The primary swell is predicted to be 0.6m and 10s period with a secondary swell of 0.5m and 6s. 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 9s and forecast to arrive on Wednesday (Jul 15) at 7AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 6s period and expected on Wednesday (Jul 15) at 1AM.
| Wave Type | Time (AEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 4AM (Wed 15th Jul) | 2ft (0.6m) 10s |
| Best Surf | 7AM (Wed 15th Jul) | 7ft (2.1m) 9s |
| Most Powerful | 7AM (Wed 15th Jul) | 7ft (2.1m) 9s |
Table - best surf conditions forecast for Thirroul over the next 16 days.
Alright, Rusty here. Let’s talk about what’s coming for Thirroul.
Right now, it’s flat as a pancake. The first few days are a total bust, nothing worth paddling for. There’s a gap all the way up to Wednesday, July 15th, when we finally get a little bump.
On that Wednesday morning, the 15th, a 1.6m south swell shows up with a short 10-second period. The wind is light and cross-shore, and the combined energy is 490. It’s marginal – you might find a wave, but it’s not going to be pretty.
Thursday the 16th pushes up to 1.7m from the south, with a moderate cross-shore wind that chops things up. The energy is 733 – plenty of push – but it’s messy. This is for experienced surfers only at that size, and even then, it won’t be clean.
The real standout is Monday, July 20th. That morning you’ve got a clean 1.0m east-northeast swell with light offshore wind and nice shape. Combined energy is 223 – moderate but good quality. Crowds are possible at Thirroul, but this is your best shot at a clean, fun session.
Then look at Sunday, July 26th. The morning serves up 1.7m from the south, clean with light offshore wind, energy at 262. By the afternoon, it’s a solid 2.0m, still clean with offshore wind, and energy jumps to 435. That short 7-second period will make it a bit fat, but if you’re experienced and want some size, that afternoon is your go.
Water temp is 18°, which is right about average for the season – no need for anything too heavy.
The second week is quieter overall, with the 26th being the clear winner. The 27th and 28th still have size, around 1.7m to 1.9m, but conditions are mixed and not as clean.
So, to sum it up: the first week is mostly flat or choppy. Circle Monday the 20th and Sunday the 26th of July. Those are your best bets.
Rusty.
Short Range ForecastMostly dry. Very mild (max 18°C on Mon morning, min 10°C on Mon night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Very mild (max 16°C on Thu morning, min 11°C on Thu night). Wind will be generally light. | ||||||||||||||||||||
Monday 13 | Tuesday 14 | Wednesday 15 | Thursday 16 | Friday 17 | Saturday 18 | Sunday 19 | |||||||||||||||
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 12 | S 11 | S 7 | S 16 | S 11 | S 11 | S 10 | S 9 | S 9 | S 9 | S 8 | SSE 7 | S 6 | SSE 6 | S 10 | S 10 | S 10 | ENE 8 | ENE 8 | ENE 9 | ENE 9 |
Wave Graph  | |||||||||||||||||||||
 kJ | 10 | 10 | 4 | 5 | 10 | 20 | 490 | 304 | 373 | 429 | 201 | 161 | 85 | 65 | 94 | 65 | 65 | 94 | 140 | 220 | 169 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | off | off | off | cross-off | cross-off | cross | on | cross-off | cross | cross | cross | cross | cross-on | cross-off | cross | cross-on | on | cross-on | cross-on | off |
High Tide | 7:12PM1.77m | 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 | ||||||||
Low Tide | 12:36PM0.27m | 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 | ||||||||
 | |  |  | | | | | | | | | | |  | | | | | | | |
 | 7:01 | — | — | 7:00 | — | — | 7:00 | — | — | 7:00 | — | — | 6:58 | — | — | 6:58 | — | — | 6:58 | — | — |
 | — | 5:01 | — | — | 5:02 | — | — | 5:04 | — | — | 5:04 | — | — | 5:05 | — | — | 5:05 | — | — | 5:06 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 18 | 17 | 12 | 18 | 17 | 13 | 16 | 15 | 12 | 16 | 16 | 13 | 16 | 16 | 13 | 15 | 16 | 15 | 17 | 16 | 13 |
Feels °C | 12 | 12 | 8 | 13 | 13 | 9 | 13 | 13 | 10 | 11 | 11 | 10 | 12 | 13 | 11 | 12 | 14 | 13 | 14 | 14 | 12 |
Swell 1 Height (m) Direction Period (s) | ESE 9 | S 11 | S 7 | S 7 | S 11 | S 11 | S 10 | S 9 | S 9 | S 9 | S 17 | S 17 | E 10 | S 11 | S 10 | S 10 | S 10 | ENE 8 | ENE 8 | ENE 9 | ENE 9 |
| kJ | 7 | 10 | 4 | 1 | 10 | 20 | 490 | 304 | 190 | 304 | 5 | 6 | 2 | 21 | 94 | 65 | 65 | 94 | 140 | 220 | 169 |
Swell 2 Height (m) Direction Period (s) | S 12 | S 7 | S 11 | S 10 | S 7 | — | — | E 10 | S 15 | — | E 11 | E 11 | E 10 | E 10 | E 5 | ESE 5 | E 5 | S 9 | S 9 | SSE 10 | SSE 9 |
| kJ | 10 | 1 | 2 | 2 | 1 | — | — | 2 | 5 | — | 2 | 2 | 2 | 2 | 13 | 20 | 13 | 41 | 44 | 32 | 16 |
Swell 3 Height (m) Direction Period (s) | S 7 | SE 8 | E 8 | S 16 | — | — | — | — | E 11 | — | — | E 11 | E 10 | — | E 7 | ENE 7 | ENE 7 | SSE 19 | SSE 18 | SSE 17 | SSE 13 |
| kJ | 1 | 3 | 1 | 5 | — | — | — | — | 2 | — | — | 2 | 2 | — | 1 | 10 | 16 | 35 | 61 | 56 | 35 |
Wind waves Height (m) Direction Period (s) | WSW 3 | W 2 | NW 2 | NW 3 | W 2 | SSW 6 | — | — | S 9 | S 9 | S 8 | SSE 7 | S 6 | SSE 6 | — | — | — | — | — | — | — |
| kJ | 2 | 1 | 1 | 1 | 1 | 20 | — | — | 373 | 429 | 201 | 161 | 85 | 65 | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 70 | 68 | 348 | 280 | 38 | 10 | 5 | 17 | 0 | 5 | 79 | 5 | 38 | 39 | 0 | 27 | 5 | 10 | 27 | 6 | 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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