Surf Forecasts:
Green Ball surf forecast from 22 Aug 2026:
- Most powerful swell: Friday 28 Aug, 5AM (local time) - 10ft (3.0m), 17s period, SSW swell with 5,230 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 17s and forecast to arrive on Friday (Aug 28) at 5AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.2m 7s period and expected on Wednesday (Aug 26) at 11AM.
| Wave Type | Time (WITA) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 5AM (Fri 28th Aug) | 10ft (3.0m) 17s |
Table - best surf conditions forecast for Green Ball over the next 16 days.
The Lowdown
Alright, mates, Rusty here. Let's get into it. We've got a long stretch ahead, but it's a bit of a mixed bag at Green Ball. The water temp is sitting about average for this time of year, nothing wild to report there.
The big picture is that we're looking at a lengthy run of onshore, cross-onshore wind, which is going to keep things pretty choppy and messy. The swell is coming from the SSW and SW, which is the right direction for this reef, but the wind is going to be the main issue. For the most part, the wave energy is moderate to strong, with values in the thousands, but the quality is just not there.
The first real standout, and the only one I'd get excited about, is the Friday morning of the 28th of August. The swell jumps up to 10 feet from the SSW at a 16-second period, and the combined energy is a meaty 4428. This is proper groundswell, and it's going to be a big one. However, with a 10-foot swell, this is strictly for advanced surfers only. The wind is still a cross-on from the SSE at 9 mph, so it's not going to be glassy, but it's a gentle breeze, so it's the best we're going to see. The long period will make it a bit fat and walled on a beach break, but this is a reef, so it should focus up nicely. The guiding says this spot is "fairly consistent" and "sometimes" crowded, so expect a few others out there for this one.
The following Saturday morning, the 29th of August, is a secondary option. Swell drops to 7 feet from the SSW, still a 15-second period, with energy at 1885. The wind is the same story, a gentle cross-on from the SE. It's a step down in size, but still a solid wave for the more experienced crew.
The rest of the 16-day window is a bit of a write-off, honestly. The wind stays onshore, the swell is either too small, too short period, or both. You'll see some marginal conditions, but nothing that's going to get the heart pumping. The first week of September, from the 1st to the 7th, we've got a consistent run of 6 feet to 8 feet SW swells, but the cross-onshore wind is relentless, keeping a chop on the surface. It's a real shame, because the swell direction is right, but the wind is just ruining the party.
Bottom line: the only day to circle on the calendar is Friday the 28th of August morning. It's going to be a powerful, confrontational day at Green Ball. For the rest, you're better off waiting for a change in the wind.
Rusty, signing off.
Short Range ForecastSome drizzle, heaviest during Mon morning. Warm (max 26°C on Mon afternoon, min 25°C on Sat night). Mainly fresh winds. | Days 5-7 Weather SummarySome drizzle, heaviest during Thu night. Warm (max 26°C on Thu morning, min 24°C on Wed night). Wind will be generally light. | ||||||||||||||||||
Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | Friday 28 | ||||||||||||||
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 15 | SSW 15 | SSW 15 | SSW 18 | SSW 16 | SSW 16 | SSW 14 | SW 16 | SW 16 | SSW 14 | SSW 14 | SSW 14 | SW 13 | SW 22 | SW 20 | SSW 18 | SSW 16 | SSW 16 | SW 16 |
Wave Graph  | |||||||||||||||||||
 kJ | 1963 | 1671 | 1626 | 1324 | 1856 | 1608 | 1042 | 1551 | 1551 | 1142 | 1065 | 929 | 376 | 671 | 1583 | 5163 | 4428 | 3785 | 2594 |
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 |
High Tide | 4:22AM1.80m | 7:03AM1.79m | 9:43PM1.53m | 8:23AM1.95m | 9:54PM1.73m | 9:08AM2.14m | 10:11PM1.92m | 9:44AM2.30m | 10:31PM2.12m | 10:15AM2.43m | 10:52PM2.30m | ||||||||
Low Tide | 1:53PM0.97m | 2:57PM0.78m | 2:15AM1.27m | 3:27PM0.60m | 3:06AM1.08m | 3:52PM0.44m | 3:41AM0.89m | 4:16PM0.32m | 4:12AM0.69m | 4:39PM0.23m | 4:42AM0.52m | ||||||||
 |  |  | |  | |  | | | | | | | | |  | | | | |
 | — | 6:26 | — | — | 6:24 | — | — | 6:24 | — | — | 6:24 | — | — | 6:24 | — | — | 6:22 | — | — |
 | 6:17 | — | 6:17 | — | — | 6:17 | — | — | 6:17 | — | — | 6:17 | — | — | 6:17 | — | — | 6:16 | — |
mm | — | — | — | — | 1 | — | — | — | — | — | — | — | — | — | — | 1 | — | — | — |
Temp °C | 25 | 25 | 25 | 25 | 25 | 26 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 26 | 25 | 25 | 26 | 25 | 25 |
Feels °C | 25 | 24 | 25 | 25 | 24 | 25 | 25 | 23 | 24 | 25 | 25 | 25 | 26 | 26 | 25 | 25 | 27 | 24 | 25 |
Swell 1 Height (m) Direction Period (s) | SSW 15 | SSW 15 | SSW 15 | SSW 14 | SSW 16 | SSW 16 | SSW 14 | SW 16 | SW 16 | SSW 14 | SSW 14 | SSW 14 | SW 13 | SW 16 | SSW 15 | SSW 18 | SSW 16 | SSW 16 | SW 16 |
| kJ | 1963 | 1671 | 1626 | 1227 | 1856 | 1608 | 1042 | 1551 | 1551 | 1142 | 1065 | 929 | 376 | 558 | 1374 | 5163 | 4428 | 3785 | 2594 |
Swell 2 Height (m) Direction Period (s) | SSW 24 | SSW 20 | SSW 19 | SSW 18 | — | SW 20 | SW 18 | — | S 7 | S 7 | NNE 7 | — | SSW 13 | SW 12 | SW 20 | — | — | — | SSW 16 |
| kJ | 55 | 490 | 904 | 1324 | — | 97 | 375 | — | 22 | 38 | 4 | — | 313 | 341 | 1583 | — | — | — | 1199 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | SW 17 | SW 22 | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | 295 | 671 | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | SE 6 | SE 6 | SE 6 | SE 6 | SE 6 | SE 6 | SE 6 | ESE 6 | ESE 6 | ESE 6 | ESE 5 | ESE 6 | SE 5 | SE 5 | SSE 5 | — | — | — | SSE 5 |
| kJ | 102 | 102 | 109 | 75 | 77 | 75 | 92 | 105 | 141 | 108 | 71 | 55 | 28 | 35 | 29 | — | — | — | 25 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 8 | 35 | 35 | 8 | 9 | 8 | 8 | 35 | 8 | 8 | 8 | 8 | 8 | 9 | 9 | 9 | 8 | 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.
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