Surf Forecasts:
Thirroul surf forecast from 27 Jul 2026:
- Best quality surf: Thursday 30 Jul, 4AM (local time) - 8ft (2.5m), 11s period, S swell with cross-offshore winds.
- Most powerful swell: Thursday 30 Jul, 4AM (local time) - 8ft (2.5m), 11s period, S swell with 1,544 kJ wave energy.
- Next surfable swell (1★+): Monday 27 Jul, 7PM (local time) - 2.5ft (0.8m), 8s period with SSE 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 Monday (Jul 27) at 7PM. The primary swell is predicted to be 0.8m and 8s period with a secondary swell of 0.1m and 15s. Another secondary swell of 0.3m and 2s 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 2.5m 11s and forecast to arrive on Thursday (Jul 30) at 4AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.2m 5s period and expected on Sunday (Aug 02) at 10PM.
| Wave Type | Time (AEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 7PM (Mon 27th Jul) | 2.5ft (0.8m) 8s |
| Best Surf | 4AM (Thu 30th Jul) | 8ft (2.5m) 11s |
| Most Powerful | 4AM (Thu 30th Jul) | 8ft (2.5m) 11s |
Table - best surf conditions forecast for Thirroul over the next 16 days.
The Lowdown
G’day, Rusty here, checkin’ the surf ahead for Thirroul. We’ve got a slow start, with the first few days pretty flat – Wednesday the 29th barely has a wave, with the combined swell energy down to 8 (weak). From Monday the 27th through Wednesday the 29th, it’s a quiet stretch. Then things get interesting.
Thursday the 30th of July is the big one. That morning, a solid 7ft south swell rolls in with a 9-second period, and the combined energy hits 1135 (strong). The wind’s light offshore from the SW, so conditions are clean. This is expert territory – anything over 5ft is too much for beginners, and at 7ft you need to know what you’re doing at this beach-and-reef setup. The water’s at 65°, which is a touch warmer than average for this time of year (anomaly of 2°), so it’s not too cold.
Friday the 31st of July morning is another cracker. A 7ft south groundswell, 10-second period, combined energy at 884 (strong), with glassy conditions. It’s gonna be clean and powerful. Again, expert only.
Saturday the 1st of August drops to 5ft SSE swell, 10-second period, but the cross-shore wind makes it a bit choppy. Still OK for intermediates if you don’t mind a little mess.
Sunday the 2nd of August has a cleaner morning with 3ft SSE swell, light offshore from the NNW, and combined energy at 266 (moderate). A nice little session.
The first week of August sees mixed conditions with wind and chop. Monday the 10th of August brings a 5ft ENE swell, light offshore NNW wind, and clean conditions (energy 265 moderate). Tuesday the 11th of August morning has offshore west winds at 12 mph with a 6ft ENE swell, 9-second period, and combined energy at 479 (moderate) – clean and pushy.
Crowds at Thirroul can be a thing – it gets busy sometimes, so get in early on the good days. The break is beach and reef, open to the south-east. The optimum swell direction from the guidance is SE, so those south swells with offshore winds are the sweet spot.
The standouts are Thursday the 30th of July morning and Friday the 31st of July morning. The later part of the forecast, around Monday the 10th and Tuesday the 11th of August, looks promising but less certain.
Rusty.
Short Range ForecastMostly dry. Warm (max 20°C on Tue afternoon, min 7°C on Wed night). Winds increasing (calm on Mon morning, fresh winds from the WSW by Wed afternoon). | Days 4-6 Weather SummaryMostly dry. Very mild (max 15°C on Thu morning, min 8°C on Thu night). Wind will be generally light. | ||||||||||||||||||||
Monday 27 | Tuesday 28 | Wednesday 29 | Thursday 30 | Friday 31 | Saturday 1 | Sunday 2 | |||||||||||||||
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 9 | SSE 8 | S 8 | S 8 | S 9 | S 8 | SE 13 | S 15 | S 9 | S 9 | S 9 | S 11 | S 10 | SSE 10 | SSE 10 | SSE 10 | SSE 10 | SSE 9 | SSE 9 | SE 12 | SE 11 |
Wave Graph  | |||||||||||||||||||||
 kJ | 158 | 118 | 43 | 18 | 14 | 8 | 7 | 7 | 145 | 731 | 399 | 1208 | 882 | 653 | 512 | 408 | 343 | 272 | 164 | 314 | 233 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | cross | cross-off | off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-on | cross-off | glassy | cross-on | cross-off | cross | cross-on | cross-off | cross-off | cross | off |
High Tide | 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 | 10:38AM1.21m | 10:31PM1.41m | ||||||||
Low Tide | 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 | 4:29AM0.14m | 4:22PM0.36m | ||||||||
 | |  | | |  |  | | | | | | | | | | | | | | | |
 | 6:54 | — | — | 6:52 | — | — | 6:52 | — | — | 6:50 | — | — | 6:50 | — | — | 6:50 | — | — | 6:48 | — | — |
 | — | 5:10 | — | — | 5:12 | — | — | 5:13 | — | — | 5:13 | — | — | 5:14 | — | — | 5:15 | — | — | 5:15 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 16 | 16 | 12 | 19 | 20 | 13 | 16 | 14 | 9 | 15 | 14 | 10 | 15 | 14 | 11 | 15 | 15 | 12 | 17 | 16 | 12 |
Feels °C | 13 | 13 | 10 | 15 | 17 | 9 | 8 | 7 | 2 | 10 | 9 | 6 | 11 | 10 | 8 | 12 | 12 | 10 | 13 | 12 | 11 |
Swell 1 Height (m) Direction Period (s) | S 9 | SSE 8 | S 8 | S 8 | S 9 | S 8 | NNE 4 | SE 13 | S 9 | S 9 | SSE 11 | S 11 | S 10 | SSE 10 | SSE 10 | SSE 10 | SSE 10 | SSE 9 | SSE 9 | SE 12 | SE 11 |
| kJ | 158 | 118 | 43 | 18 | 14 | 5 | 1 | 7 | 145 | 399 | 209 | 1208 | 882 | 653 | 512 | 408 | 343 | 272 | 164 | 314 | 233 |
Swell 2 Height (m) Direction Period (s) | NE 8 | SE 14 | NE 4 | SE 7 | SE 7 | SE 14 | S 7 | S 15 | NE 7 | NE 6 | NE 6 | — | NE 7 | NE 7 | NE 7 | NE 8 | NE 8 | NE 7 | SE 12 | E 17 | NE 5 |
| kJ | 2 | 8 | 2 | 7 | 7 | 8 | 1 | 4 | 2 | 2 | 2 | — | 2 | 2 | 2 | 2 | 2 | 2 | 96 | 6 | 18 |
Swell 3 Height (m) Direction Period (s) | SE 18 | NE 8 | SSE 8 | NNE 4 | SE 15 | SE 6 | SE 13 | E 8 | E 13 | E 12 | E 12 | — | — | — | — | — | E 12 | E 18 | E 17 | S 18 | SE 16 |
| kJ | 12 | 2 | 6 | 1 | 8 | 2 | 7 | 1 | 3 | 3 | 3 | — | — | — | — | — | 3 | 6 | 6 | 6 | 10 |
Wind waves Height (m) Direction Period (s) | — | — | NNW 3 | — | NE 4 | NW 3 | — | SW 4 | WSW 4 | S 9 | S 9 | — | — | — | — | — | — | NE 3 | N 2 | NE 4 | NW 2 |
| kJ | — | — | 1 | — | 4 | 2 | — | 15 | 7 | 731 | 399 | — | — | — | — | — | — | 1 | 1 | 13 | 1 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 21 | 0 | 68 | 78 | 212 | 348 | 338 | 5 | 0 | 74 | 0 | 0 | 39 | 0 | 2 | 5 | 0 | 0 | 94 | 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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