Surf Forecasts:
Thirroul surf forecast from 11 Jul 2026:
- Best quality surf: Saturday 11 Jul, 1PM (local time) - 2.5ft (0.8m), 12s period, ESE swell with cross-offshore winds.
- Most powerful swell: Wednesday 15 Jul, 10AM (local time) - 8ft (2.5m), 10s period, S swell with 1,519 kJ wave energy.
- Next surfable swell (1★+): Saturday 11 Jul, 1PM (local time) - 2.5ft (0.8m), 12s period with ESE 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 Saturday (Jul 11) at 1PM. The primary swell is predicted to be 0.8m and 12s period with a secondary swell of 1.0m 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 2.5m 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 Sunday (Jul 12) at 4AM.
| Wave Type | Time (AEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 1PM (Sat 11th Jul) | 2.5ft (0.8m) 12s |
| Best Surf | 1PM (Sat 11th Jul) | 2.5ft (0.8m) 12s |
| Most Powerful | 10AM (Wed 15th Jul) | 8ft (2.5m) 10s |
Table - best surf conditions forecast for Thirroul over the next 16 days.
G’day, Rusty here. Let’s break down what’s ahead for Thirroul over the next couple of weeks. It’s a slow burner, so don’t rush out just yet.
We’ve got a quiet stretch of nearly a week with hardly any decent surf from Saturday the 11th through to the middle of the week. Saturday morning the 11th has a small 4ft SE swell, period of 9 seconds, and a light cross-off breeze – it’s clean but the energy is weak (352). You could paddle out, but it’s nothing special. From Sunday the 12th to Thursday the 17th, the swell drops right off – we’re talking 0.7ft to 3ft, with cross-shore winds and poor conditions. Not worth your time.
Midweek the energy picks up. Wednesday the 15th brings a chunky 8ft S swell with a 10-second period and cross-shore wind at 15 mph. That’s big, and the combined energy is massive (2321) – strong stuff. But with the cross wind, it’ll be messy, and for a beach and reef spot like Thirroul, this setup looks more interesting for kite surfing than paddle surfing. Wednesday afternoon drops to 7ft with cross winds. That’s for the experienced only.
The real highlight is shaping up for Saturday the 19th of July, Sunday morning – just over a week away. We’ve got a clean 5ft E swell, period of 11 seconds, light cross-off wind from the NNW at 6 mph. The energy is moderate (523) and conditions are very good. That’s the one to aim for. Get in early Sunday for the best of it before the wind swings in the arvo.
Another standout is Wednesday the 22nd of July into Thursday the 23rd. Wednesday morning sees a big 10ft S swell, 10-second period, with a light cross breeze – that’s powerful (2908 energy) and strictly for experts. Thursday morning the 23rd is the real gem: 7ft SSE swell, 10-second period, glassy conditions with a light W breeze. The energy is still high (1050) but that flat surface will make for clean, solid waves. Excellent for experienced surfers.
After that, the swell fades into the weekend with smaller 2ft to 5ft SE/S swell and onshore or cross-shore winds, so things get ordinary again.
Your best bets: Saturday 19th morning and Thursday 23rd morning. Crowds are likely at Thirroul on those better days, so expect company.
Rusty.
Short Range ForecastMostly dry. Very mild (max 17°C on Sat morning, min 9°C on Sat night). Winds increasing (light winds from the NW on Sat morning, fresh winds from the WNW by Sat night). | Days 4-6 Weather SummaryMostly dry. Very mild (max 18°C on Tue morning, min 11°C on Tue night). Wind will be generally light. | ||||||||||||||||||||
Saturday 11 | Sunday 12 | Monday 13 | Tuesday 14 | Wednesday 15 | Thursday 16 | Friday 17 | |||||||||||||||
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) | SE 9 | ESE 11 | ESE 10 | ESE 10 | ESE 10 | ESE 9 | S 12 | S 12 | S 7 | S 19 | S 14 | S 11 | S 10 | S 9 | SSE 8 | S 8 | S 7 | S 6 | S 12 | E 9 | E 9 |
Wave Graph  | |||||||||||||||||||||
 kJ | 190 | 176 | 149 | 77 | 54 | 16 | 11 | 10 | 4 | 7 | 15 | 21 | 1519 | 854 | 384 | 163 | 117 | 66 | 178 | 166 | 202 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross | cross-off | off | off | off | cross-off | off | cross-off | cross-off | cross-off | cross-off | cross | cross | cross-off | cross | cross-on | cross-off | cross | cross-on | cross-off |
High Tide | 5:22PM1.60m | 6:09AM1.05m | 6:18PM1.70m | 7:10AM1.09m | 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 | ||||||||
Low Tide | 10:39AM0.31m | 00:15AM0.15m | 11:39AM0.29m | 1:13AM0.04m | 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 | ||||||||
 | |  |  | | | | |  | | | | | | | | | | | | | |
 | 7:01 | — | — | 7:01 | — | — | 7:01 | — | — | 7:00 | — | — | 7:00 | — | — | 7:00 | — | — | 6:58 | — | — |
 | — | 5:00 | — | — | 5:01 | — | — | 5:01 | — | — | 5:02 | — | — | 5:04 | — | — | 5:04 | — | — | 5:05 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 17 | 17 | 12 | 13 | 12 | 12 | 16 | 16 | 12 | 18 | 17 | 14 | 14 | 14 | 12 | 15 | 15 | 12 | 15 | 15 | 13 |
Feels °C | 14 | 14 | 8 | 6 | 5 | 7 | 10 | 11 | 8 | 12 | 12 | 9 | 8 | 9 | 9 | 12 | 12 | 10 | 12 | 13 | 12 |
Swell 1 Height (m) Direction Period (s) | SE 9 | SE 8 | ESE 10 | ESE 10 | ESE 10 | ESE 9 | ESE 8 | S 12 | S 7 | S 7 | S 14 | S 11 | S 10 | — | S 16 | SE 6 | S 7 | S 6 | E 8 | E 9 | E 9 |
| kJ | 190 | 109 | 149 | 77 | 54 | 16 | 7 | 10 | 4 | 4 | 15 | 21 | 802 | — | 5 | 56 | 92 | 41 | 88 | 153 | 202 |
Swell 2 Height (m) Direction Period (s) | ESE 12 | ESE 11 | SSE 8 | SE 8 | SSE 8 | S 9 | S 12 | SE 8 | S 11 | S 10 | S 6 | S 6 | — | — | — | S 14 | ESE 6 | ESE 6 | E 8 | S 11 | S 11 |
| kJ | 157 | 176 | 45 | 17 | 6 | 6 | 11 | 3 | 2 | 2 | 1 | 1 | — | — | — | 4 | 43 | 30 | 88 | 166 | 82 |
Swell 3 Height (m) Direction Period (s) | S 15 | S 15 | S 15 | NE 5 | S 12 | SE 8 | S 7 | SW 4 | E 8 | S 19 | — | E 10 | — | — | — | — | S 13 | SSE 13 | — | S 17 | S 19 |
| kJ | 5 | 4 | 4 | 1 | 3 | 2 | 1 | 1 | 1 | 7 | — | 2 | — | — | — | — | 13 | 32 | — | 6 | 7 |
Wind waves Height (m) Direction Period (s) | — | NNE 3 | N 3 | W 4 | W 3 | W 3 | W 4 | W 3 | NW 2 | W 3 | WSW 3 | SW 3 | S 10 | S 9 | SSE 8 | S 8 | S 7 | S 6 | S 12 | — | SSW 2 |
| kJ | — | 3 | 7 | 14 | 8 | 8 | 9 | 6 | 1 | 5 | 8 | 6 | 1519 | 854 | 384 | 163 | 117 | 66 | 178 | — | 1 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 2 | 2 | 10 | 37 | 38 | 246 | 70 | 280 | 328 | 212 | 7 | 5 | 79 | 0 | 2 | 5 | 0 | 2 | 5 | 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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