
Surf Forecasts:
Green Ball surf forecast from 8 Aug 2026:
- Most powerful swell: Monday 10 Aug, 11PM (local time) - 11ft (3.5m), 17s period, SSW swell with 6,934 kJ wave energy.
Best Forecast Surf Conditions for Green Ball this week:
The most powerful waves expected at Green Ball in the next 16 days are 3.5m 17s and forecast to arrive on Monday (Aug 10) at 11PM. Winds are predicted to be cross-onshore at the time the swell arrives.
| Wave Type | Time (WITA) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 11PM (Mon 10th Aug) | 11ft (3.5m) 17s |
Table - best surf conditions forecast for Green Ball over the next 16 days.
The Lowdown
G'day, Rusty here. Let's talk Green Ball.
We've got a long stretch of solid SSW swell coming in, but the wind's been a real pain the whole time. That steady cross-onshore breeze means it's going to stay choppy and messy for most of this run. It's a reef break, advanced only, and with this much energy in the water, it's no place for beginners. The water temp is sitting at 79°, which is about average for this time of year.
First sign of life is Sunday the 9th, but don't get your hopes up. It's a write-off – poor surf, cross-on winds at 16 mph, and the swell's a messy 8ft at 16 seconds. The combined energy is already moderate at 2582, but the wind just spoils it. That trend holds through Monday the 10th, though Monday afternoon sees the swell jump to 10ft with a very long 18-second period, giving us a massive 5909 combined energy. But again, that cross-on breeze is there, so it's marginal at best.
Tuesday the 11th is the first time we get a hint of something better. Morning sees 10ft SSW swell with a 17-second period, a huge 5517 combined energy, and the wind eases to a gentle 9 mph cross-on. Still choppy, but that's the cleanest it's going to get. For the experts out there, that morning window might offer a few. The afternoons stay choppy, though.
From Wednesday the 12th right through to Sunday the 16th, we're stuck in a grinding pattern of 7ft to 8ft SSW swell with moderate cross-on winds. The combined energy stays in the 2000–3000 range, but the wind just won't let it clean up. It's a frustrating stretch. A few marginal sessions are possible on the mornings of the 14th and 15th when the wind drops to a gentle breeze, but "marginal" is the key word.
Monday the 17th sees a drop-off – swell backs down to 5ft, energy drops to 1092, and by the afternoon it's back to poor. Tuesday the 18th through Thursday the 20th sees a shift to SW swell, but it's still cross-on and choppy. The 19th actually pumps out 10ft SW swell with 5583 combined energy, but with 16 mph cross-on winds, it's just a messy, powerful wall for experts only.
Friday the 21st through to Monday the 24th is the tail end. Swell slowly drops from 8ft down to 5ft, period shortens to 14 seconds, and the wind never lets up. The energy fades from 2753 down to 1141. There's the occasional marginal morning, but nothing worth getting excited about. By Monday the 24th afternoon, it's all over – poor conditions and the swell's dropped out.
So, the only real standout is Tuesday morning the 11th. Big, long-period SSW groundswell, lighter wind, and that massive 5517 combined energy. For advanced crew only, but that's your window. The rest is a battle with the wind. For anyone else, with that constant cross-onshore and solid swell, this setup looks more interesting for kite surfing than paddle surfing. The long gaps of poor conditions are the story here – there's no clean run until that Tuesday window.
Rusty.
Short Range ForecastSome drizzle, heaviest during Sun night. Warm (max 25°C on Sun morning, min 24°C on Sun night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 25°C on Wed afternoon, min 24°C on Wed morning). Wind will be generally light. | ||||||||||||||||||||
Sunday 9 | Monday 10 | Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | |||||||||||||||
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) | SSW 16 | SSW 16 | SSW 15 | SSW 19 | SSW 18 | SSW 17 | SSW 17 | SSW 16 | SSW 16 | SSW 14 | SSW 16 | SSW 18 | SSW 17 | SSW 16 | SSW 16 | SSW 15 | SSW 15 | SSW 14 | SSW 17 | SSW 16 | SSW 16 |
Wave Graph | |||||||||||||||||||||
2518 | 2271 | 1772 | 2613 | 5909 | 6920 | 5517 | 3288 | 3182 | 1657 | 2115 | 1567 | 3593 | 4182 | 3752 | 2758 | 2111 | 1578 | 3028 | 2753 | 2588 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on |
High Tide | 7:52PM1.35m | 6:55AM2.17m | 9:09PM1.57m | 8:21AM2.32m | 9:50PM1.82m | 9:21AM2.50m | 10:25PM2.07m | 10:10AM2.63m | 10:58PM2.29m | 10:53AM2.68m | 11:30PM2.47m | 11:31AM2.64m | 00:00AM2.59m | ||||||||
Low Tide | 1:08PM0.72m | 11:40PM1.21m | 2:35PM0.53m | 1:50AM1.12m | 3:28PM0.33m | 3:04AM0.90m | 4:08PM0.17m | 3:58AM0.67m | 4:44PM0.07m | 4:43AM0.47m | 5:16PM0.04m | 5:25AM0.33m | 5:46PM0.07m | ||||||||
6:31 | — | — | 6:31 | — | — | 6:31 | — | — | 6:30 | — | — | 6:30 | — | — | 6:30 | — | — | 6:28 | — | — | |
— | 6:17 | — | — | 6:17 | — | — | 6:17 | — | — | 6:17 | — | — | 6:17 | — | — | 6:17 | — | — | 6:17 | — | |
mm | — | — | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 25 | 25 | 25 | 25 | 25 | 24 | 24 | 25 | 25 | 24 | 25 | 24 | 25 | 25 | 25 | 24 | 24 | 24 | 24 | 25 | 25 |
Feels °C | 24 | 24 | 25 | 25 | 25 | 24 | 24 | 25 | 26 | 22 | 25 | 24 | 25 | 24 | 26 | 26 | 24 | 25 | 25 | 26 | 27 |
Swell 1 Height (m) Direction Period (s) | SSW 16 | SSW 16 | SSW 15 | SSW 19 | SSW 18 | SSW 17 | SSW 17 | SSW 16 | SSW 16 | SSW 14 | SSW 16 | SSW 18 | SSW 17 | SSW 16 | SSW 16 | SSW 15 | SSW 15 | SSW 14 | SSW 17 | SSW 16 | SSW 16 |
2518 | 2271 | 1772 | 2613 | 5909 | 6920 | 5517 | 3288 | 3182 | 1657 | 2115 | 1567 | 3593 | 4182 | 3752 | 2758 | 2111 | 1578 | 3028 | 2753 | 2588 | |
Swell 2 Height (m) Direction Period (s) | — | — | SSW 20 | SSW 15 | — | — | — | SSW 19 | — | SSW 17 | SSW 20 | S 13 | — | — | SSW 24 | SSW 21 | SSW 20 | SSW 19 | — | — | — |
— | — | 314 | 1409 | — | — | — | 1667 | — | 975 | 218 | 878 | — | — | 54 | 260 | 364 | 1159 | — | — | — | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | SSW 21 | — | — | — | — | — | SE 8 | — | — | — | — | — |
— | — | — | — | — | — | — | — | — | 86 | — | — | — | — | — | 33 | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | SE 5 | SE 5 | SE 5 | SE 5 | — | — | — | SE 7 | SE 5 | — | — | ESE 5 | SE 5 | — | — | — | SSE 7 | SE 7 | SE 4 | SE 4 | SE 5 |
64 | 53 | 45 | 35 | — | — | — | 64 | 25 | — | — | 12 | 28 | — | — | — | 37 | 36 | 14 | 15 | 19 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 35 | 8 | 8 | 8 | 9 | 8 | 9 | 9 | 8 | 8 | 8 | 8 | 9 | 9 | 8 | 8 | 8 | 8 | 9 | 9 | 8 |
Best forecast wave conditions in The Bukit - Bali | |||||||||||||||||||||
Best forecast wave conditions in Indonesia | |||||||||||||||||||||
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Information about the Green Ball Surf forecast
The above surf forecast table for Green Ball provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Green Ball can be found by selecting the local surf guide option on the grey menu. Our Green Ball 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 (Green Ball) 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 Green Ball 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.
Green Ball is 14 km (9 miles) from the city of Kuta. If you plan a holiday in The Bukit - Bali, look for hotels and other accommodation in Kuta. Kuta has rooms for a wide range of budgets as well as car hire and transport links.











