
Surf Forecasts:
Green Ball surf forecast from 5 Sep 2026:
- Most powerful swell: Wednesday 9 Sep, 8AM (local time) - 10ft (3.0m), 16s period, SSW swell with 3,812 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 3.0m 16s and forecast to arrive on Wednesday (Sep 09) at 8AM. Winds are predicted to be onshore at the time the swell arrives.
| Wave Type | Time (WITA) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 8AM (Wed 9th Sep) | 10ft (3.0m) 16s |
Table - best surf conditions forecast for Green Ball over the next 16 days.
The Lowdown
Alright, let’s get into it. The forecast for the next couple of weeks is a bit of a mixed bag, to be honest. There’s a lot of onshore and cross-onshore wind on the cards, which is going to mess with the surface of the waves. We’ve got Green Ball (Southeast) as the main spot, but don’t expect any magic.
We start off this Sunday the 6th with some solid swell. The waves are going to be in the 7ft range with a long 17-second period, and the energy is strong, coming in at 2753. But the wind is cross-on from the SE at 12 mph, so it’s going to be choppy and messy. It’s questionable, really. Not the kind of day you’d be bragging about.
Monday the 7th is much the same, with that persistent cross-on wind. The swell stays around 7ft in the morning, but the period drops to 14 seconds, and the energy is still moderate. Honestly, the surf quality is looking poor, especially by the afternoon. It’s a write-off for getting any clean ones.
Then we get a bit of a reprieve starting Tuesday the 8th. The wind swings to straight onshore, but it’s lighter, around 9-12 mph. The swell is still solid at 8ft, and the period jumps back up to 18 seconds in the afternoon, which is a proper groundswell. The energy is still strong at 3906. The problem is that it's still onshore, so it's going to be bumpy. The score is better, but I wouldn't call it epic. It's surfable, but you'll be working for it.
Wednesday the 9th and Thursday the 10th keep that onshore flow with a gentle breeze, with swell holding around 8ft and 8ft. The period is still good, in the 16-17 second range, and the energy remains strong. There's potential here, but the wind direction is just not your friend. It’s likely to be lumpy and a bit of a battle.
Friday the 11th and Saturday the 12th, the wind goes back to cross-on and picks up to 12-16 mph. The swell drops off a bit, and the overall energy backs off too. Saturday afternoon is looking particularly poor. I’d give those days a miss and go do something else.
The second week starts off with more of the same mediocrity. From Sunday the 13th through to Thursday the 18th, it’s a whole lot of cross-on wind and waves in the 6ft to 8ft range. There are a few glimmers, but mostly, it’s going to be chopped-up and not very inviting. The energy is moderate, but the quality is just not there.
Now, here’s the light at the end of the tunnel. We’ve got a promising window opening up on Saturday the 19th of September. The wind is forecast to be lighter, around 6-9 mph, and even though it’s still cross-on, the early morning has a light breeze with just small wind ripples. The swell is up at 7ft and the period is a solid 17 seconds. This is the kind of swell we want to see. Energy is moderate to strong at 2554.
Sunday the 20th is also worth a look. The swell builds to 8ft, but the period drops a touch to 15 seconds. Still, it’s the cleanest-looking conditions we’ve had in a while. It’s not going to be perfect, but it’s the best on offer for a proper surf. The water temp is about average for this time of year, so a wetsuit is still the go.
So, if you’re keen, mark your calendar for the 19th and 20th. It’s not a classic, but it’s our best shot at some half-decent waves. Before that, you might as well save your energy. These periods of onshore wind are a pain, but they don’t last forever.
Rusty
Short Range ForecastMostly dry. Warm (max 25°C on Sun morning, min 24°C on Sun night). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 5mm), mostly falling on Thu night. Warm (max 26°C on Fri afternoon, min 24°C on Wed morning). Wind will be generally light. | ||||||||||||||||||||
Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | |||||||||||||||
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 17 | SSW 16 | SSW 15 | SSW 14 | SSW 14 | SSW 13 | SSW 13 | SSW 18 | SSW 16 | SSW 16 | SSW 16 | SSW 15 | SSW 17 | SSW 16 | SW 16 | SW 16 | SW 16 | SW 15 | SW 14 | SW 14 | SW 19 |
Wave Graph | |||||||||||||||||||||
2731 | 1857 | 2474 | 1956 | 1579 | 1422 | 1739 | 2247 | 2402 | 3412 | 2961 | 2206 | 2952 | 2681 | 2379 | 2066 | 2066 | 1361 | 1109 | 1016 | 1935 | |
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 | on | on | cross-on | on | on | on | on | cross-on | cross-on | cross-on | cross | cross-on | cross-on | cross-on | cross-on | cross-on |
High Tide | 4:59PM1.27m | 4:48AM1.98m | 8:23PM1.45m | 7:12AM2.03m | 9:02PM1.73m | 8:30AM2.22m | 9:33PM2.02m | 9:21AM2.40m | 10:02PM2.28m | 10:03AM2.52m | 10:30PM2.50m | 10:40AM2.56m | 10:57PM2.66m | ||||||||
Low Tide | 10:46AM0.85m | 8:48PM1.17m | 1:18PM0.79m | 00:26AM1.28m | 2:31PM0.59m | 2:17AM1.05m | 3:13PM0.41m | 3:13AM0.75m | 3:47PM0.28m | 3:55AM0.49m | 4:18PM0.20m | 4:33AM0.28m | 4:46PM0.18m | ||||||||
6:18 | — | — | 6:18 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:15 | — | — | 6:15 | — | — | |
— | 6:16 | — | — | 6:16 | — | — | 6:15 | — | — | 6:15 | — | — | 6:15 | — | — | 6:15 | — | — | 6:15 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2 | — | — | 3 | 1 | — | 2 |
Temp °C | 25 | 25 | 25 | 24 | 25 | 25 | 24 | 25 | 25 | 24 | 24 | 24 | 25 | 25 | 25 | 25 | 26 | 26 | 25 | 26 | 26 |
Feels °C | 25 | 25 | 25 | 24 | 25 | 25 | 24 | 25 | 26 | 25 | 24 | 25 | 27 | 26 | 27 | 26 | 27 | 27 | 26 | 27 | 26 |
Swell 1 Height (m) Direction Period (s) | SSW 17 | SSW 16 | SSW 15 | SSW 14 | SSW 14 | SSW 13 | SSW 13 | SSW 13 | SSW 16 | SSW 16 | SSW 16 | SSW 15 | SSW 17 | SSW 16 | SW 16 | SW 16 | SW 16 | SW 15 | SW 14 | SW 14 | SW 19 |
2731 | 1857 | 2474 | 1956 | 1579 | 1422 | 1739 | 1659 | 2402 | 3412 | 2961 | 2206 | 2952 | 2681 | 2379 | 2066 | 2066 | 1361 | 1109 | 1016 | 1935 | |
Swell 2 Height (m) Direction Period (s) | — | SSW 12 | — | SSW 22 | SW 22 | SSW 21 | SSW 19 | SSW 18 | SSW 12 | — | — | SSW 18 | — | — | SW 26 | SSW 26 | SW 24 | SSW 9 | SW 21 | SW 21 | SW 14 |
— | 639 | — | 47 | 119 | 546 | 1527 | 2247 | 1178 | — | — | 209 | — | — | 27 | 66 | 197 | 45 | 763 | 436 | 752 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | SW 24 | — | NE 7 | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 195 | — | 7 | — | |
Wind waves Height (m) Direction Period (s) | SE 5 | — | — | — | SE 4 | — | — | — | — | — | — | SSE 4 | — | — | ESE 4 | ESE 5 | SE 5 | ESE 5 | SE 5 | ESE 6 | ESE 6 |
21 | — | — | — | 8 | — | — | — | — | — | — | 11 | — | — | 22 | 31 | 39 | 61 | 39 | 59 | 97 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 8 | 35 | 8 | 8 | 8 | 9 | 8 | 8 | 8 | 8 | 8 | 8 | 16 |
Best forecast wave conditions in The Bukit - Bali | |||||||||||||||||||||
Best forecast wave conditions in Indonesia | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)
Wind Speed (km/h)
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.










