Surf Forecasts:
Thirroul surf forecast from 14 Jul 2026:
- Best quality surf: Wednesday 15 Jul, 7AM (local time) - 10ft (3.0m), 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 1,732 kJ wave energy.
- Next surfable swell (1★+): Wednesday 15 Jul, 4AM (local time) - 3.5ft (1.1m), 7s 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 1.1m and 7s 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 0.9m 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) | 3.5ft (1.1m) 7s |
| Best Surf | 7AM (Wed 15th Jul) | 10ft (3.0m) 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.
First up, things are looking pretty flat and quiet around here. We’ve got a bit of a lull to start, so don’t bother paddling out just yet. The real action is going to come later, and there are a couple of days that are genuinely worth circling on the calendar.
We’ve got a small pulse of weak energy expected in the coming days, but we need some clean conditions to line up. The water temp is sitting at about 65° at Thirroul, which is pretty much what you’d expect for this time of year, nothing weird going on there.
The first standout looks like Monday, July 20th. That morning at Thirroul (beach and reef) is looking really clean. The swell will be from the east-northeast pushing about 5ft, and with a period of 10 seconds, it’s a nice groundswell. The wind is forecast to be glassy, which is a massive positive for a clean surface. Combined wave energy is moderate (508). It’s a decent option for intermediates, but keep in mind this spot can get crowded sometimes. The swell direction aligns nicely with the optimum southeast swell for this break, so it should wrap in pretty well.
Then, the true standout for experienced surfers is Thursday, July 23rd. Both that morning and afternoon at Thirroul are looking excellent. Swell from the east is pumping up to about 6ft with a very long period of 13–14 seconds. That’s some serious groundswell energy, with the combined energy hitting strong levels (1273 in the morning, 1103 in the afternoon). With that long period, it’ll be better shaped and more powerful, but it will be breaking a bit straight at the beach, so it’s best for those who know what they’re doing. Morning winds are light offshore from the west, and the afternoon turns glassy. That’s about as good as it gets for clean, solid waves. The swell direction matches the optimum onshore direction, so it should fire.
Outside of those two windows, the rest of the 16-day run is pretty average to poor. We’ve got a solid but messy south swell on Wednesday, July 15th, with about 10ft and very strong energy (2766), but it’s cross-shore winds and choppy, making it marginal at best and really only for experts. After that, things go back to small and clean but weak, or clean but too small, until that Thursday gem.
So, in short: the week starts flat, then we get a decent little Monday morning, but the real gold is on Thursday the 23rd. That’s your session.
Rusty
Short Range ForecastSome drizzle, heaviest during Thu night. Very mild (max 19°C on Tue morning, min 10°C on Tue night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Very mild (max 16°C on Sun morning, min 12°C on Fri night). Wind will be generally light. | ||||||||||||||||||||
Tuesday 14 | Wednesday 15 | Thursday 16 | Friday 17 | Saturday 18 | Sunday 19 | Monday 20 | |||||||||||||||
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 10 | S 11 | S 11 | S 10 | S 8 | S 7 | S 8 | S 8 | SSE 7 | S 5 | S 5 | S 10 | S 10 | S 10 | ENE 7 | ENE 9 | ENE 11 | ENE 10 | ENE 10 | ENE 10 | ENE 10 |
Wave Graph  | |||||||||||||||||||||
 kJ | 2 | 10 | 20 | 1732 | 686 | 352 | 464 | 258 | 158 | 71 | 45 | 87 | 68 | 48 | 89 | 265 | 551 | 451 | 380 | 388 | 338 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | off | cross-off | cross | cross | cross-off | cross | cross-on | cross | cross | cross-on | cross-off | cross | cross-on | cross-on | cross-on | on | glassy | glassy | cross | off |
High Tide | 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 | 00:57AM1.14m | ||||||||
Low Tide | 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 | 7:05PM0.46m | ||||||||
 |  |  | | | | |  |  | | |  | | | | | | | | | | |
 | 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 | — | — | — | — | — | — | — | — | 1 | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 19 | 17 | 13 | 15 | 14 | 11 | 15 | 15 | 13 | 14 | 15 | 13 | 14 | 15 | 15 | 16 | 16 | 14 | 17 | 17 | 13 |
Feels °C | 13 | 11 | 8 | 10 | 9 | 7 | 9 | 10 | 10 | 11 | 13 | 11 | 11 | 13 | 13 | 14 | 14 | 13 | 14 | 14 | 11 |
Swell 1 Height (m) Direction Period (s) | S 6 | S 11 | S 11 | S 10 | S 8 | SSE 7 | S 8 | SSE 18 | SSE 18 | S 8 | E 5 | S 10 | E 6 | E 6 | ENE 7 | ENE 9 | ENE 11 | ENE 10 | ENE 10 | ENE 10 | ENE 10 |
| kJ | 1 | 10 | 20 | 1034 | 461 | 191 | 295 | 30 | 32 | 32 | 7 | 87 | 30 | 31 | 89 | 265 | 551 | 451 | 380 | 388 | 338 |
Swell 2 Height (m) Direction Period (s) | — | S 6 | E 10 | — | — | — | S 17 | — | E 11 | S 16 | E 10 | E 5 | S 10 | S 10 | S 9 | S 10 | SE 16 | S 13 | S 12 | S 12 | S 11 |
| kJ | — | 1 | 2 | — | — | — | 6 | — | 2 | 5 | 2 | 11 | 68 | 48 | 42 | 30 | 69 | 86 | 106 | 68 | 37 |
Swell 3 Height (m) Direction Period (s) | S 10 | S 18 | E 10 | — | — | S 16 | — | E 11 | E 11 | E 10 | S 15 | ENE 6 | SSE 21 | S 19 | SSE 19 | SSE 18 | S 9 | SE 16 | SSE 15 | SE 14 | SE 14 |
| kJ | 2 | 6 | 2 | — | — | 5 | — | 2 | 2 | 2 | 4 | 8 | 42 | 7 | 35 | 60 | 15 | 10 | 22 | 33 | 31 |
Wind waves Height (m) Direction Period (s) | WNW 2 | WSW 3 | SW 6 | S 10 | S 8 | S 7 | S 8 | S 8 | SSE 7 | S 5 | S 5 | — | S 4 | S 4 | — | — | — | — | — | NE 3 | N 3 |
| kJ | 1 | 6 | 32 | 1732 | 686 | 352 | 464 | 258 | 158 | 71 | 45 | — | 6 | 6 | — | — | — | — | — | 3 | 5 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 348 | 247 | 2 | 5 | 79 | 0 | 86 | 109 | 5 | 2 | 39 | 0 | 10 | 5 | 5 | 11 | 63 | 0 | 0 | 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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