Surf Forecasts:
Thirroul surf forecast from 27 Aug 2026:
- Best quality surf: Friday 28 Aug, 4AM (local time) - 5ft (1.6m), 11s period, SSE swell with offshore winds.
- Most powerful swell: Friday 28 Aug, 4AM (local time) - 5ft (1.6m), 11s period, SSE swell with 631 kJ wave energy.
- Next surfable swell (1★+): Friday 28 Aug, 4AM (local time) - 5ft (1.6m), 11s 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 Friday (Aug 28) at 4AM. The primary swell is predicted to be 1.6m and 11s period with a secondary swell of 0.4m and 9s. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Thirroul in the next 16 days are 1.6m 11s and forecast to arrive on Friday (Aug 28) at 4AM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 6s period and expected on Wednesday (Sep 02) at 10AM.
| Wave Type | Time (AEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 4AM (Fri 28th Aug) | 5ft (1.6m) 11s |
| Best Surf | 4AM (Fri 28th Aug) | 5ft (1.6m) 11s |
| Most Powerful | 4AM (Fri 28th Aug) | 5ft (1.6m) 11s |
Table - best surf conditions forecast for Thirroul over the next 16 days.
The Lowdown
G’day, I’m Rusty. Let’s talk about what’s on offer for Thirroul over the next couple of weeks.
We kick off with a bit of a quiet start. Friday the 28th has some waves but the wind is messy—cross on the morning and cross-on in the afternoon, so it’s not really worth suiting up for. Saturday morning 29th is the first real standout: glassy conditions with a clean 4ft SSE swell. The combined swell energy is moderate (404), the wind is glass, and you’ll get clean, lined-up surf on the beach and reef setup. That’s the pick of the early run. Saturday afternoon drops off with onshore wind.
Sunday 30th and Monday 31st have small swell around 3ft, but Sunday’s wind is cross-on, while Monday morning shapes up nicely with a light cross-off breeze and clean surf from a 3ft S swell. The energy is moderate (260) and conditions are clean. Tuesday 1st September has a small 3ft S swell with an 11-second period—decent shape, but the wind is cross-off on the morning, making it surfable but ordinary. By Wednesday 2nd the swell drops to 2ft, and it stays tiny through Thursday 3rd and Friday 4th, with combined energy in the low double digits. That’s a solid gap of weak waves.
Now, the good news: Sunday 6th September afternoon fires up. The wind turns offshore from the west at 15 mph, and the swell bumps to 4ft from the south with an 8-second period. The combined energy jumps to 316 (moderate), and it’s clean, offshore, and punchy. That’s another standout session.
Into the second week, Monday 7th September morning brings a solid 7ft S swell with an 11-second period. The energy is strong (1053) but at that size it’s best for experienced surfers. Wind is cross-off from the southwest, so it’s clean but the swell might be a bit much for the beach and reef setup. A point break would handle it better. Tuesday 8th September morning goes glassy with a 4ft S swell, combined energy 296, and clean conditions—worth a look. After that, the surf fades again into small, weak waves through to Saturday 12th September, with only the odd ordinary session.
Overall, Saturday 29th morning and Sunday 6th afternoon are your best bets. For the rest, pick your moments carefully.
Rusty.
Short Range ForecastMostly dry. Very mild (max 18°C on Sun morning, min 11°C on Thu night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 26°C on Wed morning, min 11°C on Sun night). Wind will be generally light. | ||||||||||||||||||
Friday 28 | Saturday 29 | Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | ||||||||||||||
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) | SSE 12 | SSE 11 | SSE 10 | SSE 9 | SSE 10 | SE 10 | SE 10 | S 9 | S 9 | S 9 | S 9 | SSE 9 | S 9 | S 11 | S 11 | S 10 | S 10 | S 10 | SSE 10 |
Wave Graph  | |||||||||||||||||||
 kJ | 285 | 511 | 446 | 261 | 290 | 211 | 134 | 152 | 207 | 230 | 151 | 141 | 76 | 151 | 146 | 100 | 70 | 48 | 32 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | cross | cross-on | cross-off | glassy | on | off | cross-on | on | off | cross-off | cross | cross-off | cross-off | cross | cross-off | cross-off | off | off |
High Tide | 8:16AM1.21m | 8:16PM1.53m | 8:51AM1.27m | 8:52PM1.50m | 9:26AM1.33m | 9:30PM1.43m | 10:03AM1.38m | 10:11PM1.34m | 10:43AM1.41m | 10:56PM1.23m | 11:28AM1.41m | 11:50PM1.11m | |||||||
Low Tide | 2:15AM0.13m | 1:59PM0.28m | 2:45AM0.11m | 2:40PM0.25m | 3:16AM0.11m | 3:22PM0.25m | 3:48AM0.13m | 4:08PM0.25m | 4:22AM0.18m | 4:58PM0.28m | 5:01AM0.25m | 5:55PM0.31m | |||||||
 |  |  | | | | | | | | | | | | | | | |  | |
 | — | 6:20 | — | — | 6:20 | — | — | 6:18 | — | — | 6:16 | — | — | 6:16 | — | — | 6:13 | — | — |
 | — | — | 5:34 | — | — | 5:35 | — | — | 5:35 | — | — | 5:36 | — | — | 5:37 | — | — | 5:37 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 12 | 17 | 15 | 13 | 16 | 15 | 12 | 18 | 16 | 12 | 20 | 19 | 14 | 24 | 23 | 17 | 26 | 26 | 19 |
Feels °C | 10 | 14 | 11 | 12 | 14 | 14 | 11 | 16 | 14 | 11 | 17 | 15 | 13 | 20 | 20 | 15 | 22 | 23 | 17 |
Swell 1 Height (m) Direction Period (s) | S 8 | SSE 11 | ENE 8 | SSE 9 | SSE 10 | SE 10 | SE 10 | S 9 | S 9 | S 9 | S 9 | SSE 9 | S 9 | S 11 | S 11 | S 10 | S 10 | S 10 | NNE 5 |
| kJ | 134 | 511 | 26 | 261 | 290 | 211 | 134 | 152 | 207 | 230 | 151 | 141 | 76 | 151 | 146 | 100 | 70 | 48 | 10 |
Swell 2 Height (m) Direction Period (s) | SSE 12 | ENE 8 | SSW 11 | NE 8 | S 8 | S 8 | S 9 | SE 9 | ENE 9 | SSE 17 | SSE 15 | SSE 16 | S 11 | ENE 9 | ENE 11 | NE 6 | ENE 10 | NE 5 | SSE 10 |
| kJ | 285 | 27 | 40 | 17 | 99 | 135 | 99 | 68 | 15 | 100 | 91 | 82 | 62 | 15 | 22 | 15 | 34 | 9 | 30 |
Swell 3 Height (m) Direction Period (s) | ENE 9 | SSW 13 | S 11 | S 10 | ENE 9 | ENE 9 | ENE 9 | ENE 9 | SE 9 | ENE 8 | ENE 10 | ENE 9 | ENE 9 | E 11 | N 12 | ENE 10 | NE 12 | ENE 10 | ENE 10 |
| kJ | 31 | 59 | 39 | 34 | 15 | 25 | 26 | 26 | 12 | 14 | 18 | 16 | 15 | 10 | 3 | 35 | 6 | 33 | 32 |
Wind waves Height (m) Direction Period (s) | — | — | SSE 10 | — | — | — | — | — | — | — | — | NE 3 | — | NNE 3 | NE 4 | NNW 2 | NNE 6 | NE 5 | NW 3 |
| kJ | — | — | 446 | — | — | — | — | — | — | — | — | 2 | — | 1 | 16 | 1 | 17 | 33 | 3 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 0 | 2 | 48 | 0 | 0 | 98 | 0 | 5 | 79 | 0 | 0 | 40 | 0 | 0 | 2 | 0 | 2 | 0 | 0 |
Best forecast wave conditions in Illawarra | |||||||||||||||||||
Best forecast wave conditions in Australia | |||||||||||||||||||
Header Global | |||||||||||||||||||
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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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