Surf Forecasts:
Thirroul surf forecast from 6 Jul 2026:
- Best quality surf: Thursday 9 Jul, 10PM (local time) - 5ft (1.6m), 9s period, SE swell with glassy winds.
- Most powerful swell: Tuesday 7 Jul, 1PM (local time) - 11ft (3.5m), 11s period, SE swell with 2,717 kJ wave energy.
- Next surfable swell (1★+): Thursday 9 Jul, 10PM (local time) - 5ft (1.6m), 9s period with SE 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 09) at 10PM. The primary swell is predicted to be 1.6m and 9s period with a secondary swell of 0.2m and 10s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Thirroul in the next 16 days are 3.5m 11s and forecast to arrive on Tuesday (Jul 07) at 1PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 4s period and expected on Monday (Jul 13) at 7PM.
| Wave Type | Time (AEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 10PM (Thu 9th Jul) | 5ft (1.6m) 9s |
| Best Surf | 10PM (Thu 9th Jul) | 5ft (1.6m) 9s |
| Most Powerful | 1PM (Tue 7th Jul) | 11ft (3.5m) 11s |
Table - best surf conditions forecast for Thirroul over the next 16 days.
Updates in hr min s Forecast update imminent
Righto, let’s have a look at what’s on the cards for Thirroul over the coming 16 days. It’s a beach and reef setup, exposed to the swell, and mostly intermediate territory.
We start off with a bit of a rough patch. The first couple of days, Monday the 6th and Tuesday the 7th of July, bring some serious size—up to 10ft to 12ft—but the wind is cross or cross-on, making it messy. This is big, heavy stuff (combined swell energy of 3849 to 4750, so plenty of power), and with that short period around 10 seconds, it’s gonna be a battle. Beginners should steer well clear; even for experienced surfers, it’s a challenge. The water temp is 65°, which is about average for this time of year, nothing unusual there.
Wednesday the 8th and Thursday the 9th stay marginal, with dropping swell but still cross-shore winds. It’s not the cleanest window.
Then we get a nice little breather. Friday the 10th and Saturday the 11th see the swell drop to around 5ft, but the wind goes glassy on Friday morning and afternoon, and then light offshore on Saturday. The swell direction is SE, period 9-10 seconds—decent shape for the reef. This is clean, small, and fun, but the combined energy is modest (around 258-441). It’s not a standout, but it’s a solid window for a longboard or a fish.
The real standout—and I mean, this is the one to circle on your calendar—is Friday the 17th of July. We get a clean 7ft S swell, period 11 seconds (long-period groundswell), with offshore wind from the NW in the morning. That’s a recipe for some proper waves at Thirroul. Combined swell energy hits 1385, so there’s good grunt behind it. This is for experienced surfers only at that size, but it’ll be firing and clean. It’s the best on offer hands down.
Following that, Saturday the 18th and Sunday the 19th stay rideable with clean conditions and dropping swell, but nothing that matches the Friday stand-out.
After that, the last few days (20th-21st July) see a big jump back up to 10ft on the 21st, but with cross-offshore wind. It’s clean but heavy, and combined energy is over 1700. Only for the brave.
Overall: We suffer through a big, windy start, get a couple of glassy small days mid-week, and then Friday the 17th is the clear winner. Get on it.
Rusty.
Short Range ForecastLight rain (total 6mm), mostly falling on Mon afternoon. Very mild (max 15°C on Tue morning, min 11°C on Wed night). Wind will be generally light. | Days 5-7 Weather SummaryLight rain (total 3mm), mostly falling on Thu afternoon. Very mild (max 18°C on Sat morning, min 11°C on Thu night). Wind will be generally light. | ||||||||||||||||||||
Mon 6 | Tuesday 7 | Wednesday 8 | Thursday 9 | Friday 10 | Saturday 11 | Sunday 12 | |||||||||||||||
PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | |
Swell Height Map |  |  |  |  |  |  |  |  | |||||||||||||
Wave Height (m) Direction Period (s) | SSE 10 | SSE 10 | SE 10 | SE 11 | SE 11 | SE 10 | SSE 10 | SSE 9 | SE 11 | SE 9 | SE 9 | SE 9 | SE 10 | SE 10 | SE 9 | SE 8 | ESE 11 | ESE 11 | ESE 10 | ESE 9 | ESE 9 |
Wave Graph  | |||||||||||||||||||||
 kJ | 1293 | 1724 | 1962 | 2586 | 1708 | 1259 | 981 | 450 | 677 | 440 | 393 | 384 | 428 | 354 | 199 | 139 | 214 | 138 | 85 | 50 | 15 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross | cross | cross | cross | cross | cross | cross-off | cross | cross-on | cross-off | glassy | glassy | off | cross-off | cross-off | off | off | off | off | off |
High Tide | 00:26AM1.26m | 1:34PM1.23m | 1:22AM1.17m | 2:29PM1.31m | 2:30AM1.09m | 3:26PM1.40m | 3:45AM1.05m | 4:24PM1.50m | 5:00AM1.03m | 5:22PM1.60m | 6:09AM1.05m | 6:18PM1.70m | 7:10AM1.09m | ||||||||
Low Tide | 6:26PM0.50m | 7:02AM0.22m | 7:32PM0.50m | 7:48AM0.25m | 8:46PM0.46m | 8:41AM0.28m | 10:01PM0.38m | 9:39AM0.30m | 11:11PM0.27m | 10:39AM0.31m | 00:15AM0.15m | 11:39AM0.29m | 1:13AM0.04m | 12:36PM0.27m | |||||||
 |  |  | | |  | |  |  | | | | |  | | | | | |  | | |
 | — | — | 7:01 | — | — | 7:01 | — | — | 7:01 | — | — | 7:01 | — | — | 7:01 | — | — | 7:01 | — | — | 7:01 |
 | 4:59 | — | — | 4:59 | — | — | 5:00 | — | — | 5:00 | — | — | 5:00 | — | — | 5:00 | — | — | 5:01 | — | 5:01 |
mm | 1 | 1 | — | 2 | 2 | — | — | — | — | 1 | 2 | — | — | — | — | — | — | — | — | — | — |
Temp °C | 14 | 14 | 15 | 15 | 15 | 15 | 15 | 12 | 14 | 14 | 13 | 15 | 15 | 12 | 18 | 17 | 12 | 16 | 16 | 11 | 13 |
Feels °C | 9 | 10 | 10 | 11 | 11 | 11 | 11 | 9 | 11 | 12 | 12 | 13 | 14 | 10 | 15 | 14 | 9 | 10 | 11 | 6 | 9 |
Swell 1 Height (m) Direction Period (s) | E 16 | SSE 10 | SE 10 | SE 11 | SE 11 | SE 10 | SE 10 | SSE 9 | SE 11 | SE 9 | SE 9 | SE 9 | SE 10 | SE 10 | SE 9 | SE 8 | ESE 11 | ESE 11 | ESE 10 | ESE 9 | ESE 9 |
| kJ | 5 | 1360 | 1601 | 2164 | 1708 | 1259 | 849 | 450 | 677 | 440 | 393 | 384 | 428 | 354 | 199 | 139 | 214 | 138 | 85 | 50 | 15 |
Swell 2 Height (m) Direction Period (s) | S 20 | — | ESE 14 | — | — | ESE 14 | ESE 12 | ESE 11 | SSE 10 | ESE 10 | S 16 | S 15 | S 21 | S 16 | ESE 13 | ESE 12 | SE 8 | SE 8 | SE 8 | S 6 | S 5 |
| kJ | 8 | — | 286 | — | — | 198 | 440 | 353 | 151 | 78 | 5 | 4 | 9 | 5 | 55 | 113 | 54 | 32 | 16 | 7 | 2 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | S 15 | S 19 | S 18 | S 16 | S 20 | S 15 | S 14 | — | S 15 | S 16 | S 15 | N 4 | — | SSE 8 | SE 7 |
| kJ | — | — | — | — | — | — | 4 | 7 | 6 | 5 | 8 | 4 | 4 | — | 4 | 5 | 4 | 1 | — | 6 | 2 |
Wind waves Height (m) Direction Period (s) | SSE 10 | SSE 10 | SSE 10 | SE 11 | — | — | SSE 10 | — | — | — | — | — | — | — | — | — | NW 2 | W 2 | WSW 3 | WSW 3 | W 3 |
| kJ | 1293 | 1724 | 1962 | 2586 | — | — | 981 | — | — | — | — | — | — | — | — | — | 1 | 1 | 6 | 4 | 4 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 48 | 48 | 5 | 11 | 11 | 5 | 11 | 5 | 2 | 5 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 328 |
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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