Green Ball Surf Break

Lat Long: 8.85° S 115.17° E

Green Ball Surf Forecast and Surf Report

Issued: 7 pm 15 Aug 2026 (local time)

Forecast update in  hr  min

Today's Green Ball sea temperature is
25.9° C
0.3° 

Green Ball surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


Green Ball surf forecast from 15 Aug 2026:

  • Most powerful swell: Thursday 20 Aug, 2AM (local time) - 10ft (3.0m), 17s period, SW swell with 5,160 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 Thursday (Aug 20) at 2AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.3m 7s period and expected on Wednesday (Aug 19) at 5AM.

Wave TypeTime (WITA) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful 2AM (Thu 20th Aug)10ft (3.0m) 17s

Table - best surf conditions forecast for Green Ball over the next 16 days.


The Lowdown

G’day, it’s Rusty.

Straight up, the next couple of weeks are going to test your patience. We’ve got a solid run of southwest groundswell on the cards, but the wind is just not playing the game for a good chunk of it. It’s a classic case of plenty of ocean energy getting messed up by a stiff cross-shore breeze. You’re gonna have to pick your moments, and even then, it’s all about managing expectations.

The window kicks off this Sunday the 16th. Out at Green Ball, we’ve got a clean 7ft SSW groundswell pushing through with a 16-second period. The energy reading is strong at 2350, so there’s plenty of push behind it. But the ESE breeze at 9 mph is creating a slight cross-chop, which will take the absolute shine off it. It’s surfable, but it’s not pretty. The morning is the only call on Sunday; the afternoon gets a bit more cross-on and starts to get chopped up.

Monday the 17th sees the swell drop slightly to 5ft, but the wind stays cross-shore. It’s more of the same, marginal stuff with a moderate cross-chop. Honestly, it’s a day to be doing something else unless you’re desperate.

We get a slight pulse mid-week, but the wind turns more cross-on. Tuesday the 18th has a strong 6ft SW swell, but the onshore component just ruins it. By Wednesday the 19th, we’re looking at 8ft of SW swell with an 18-second period – that’s a lot of water moving – but it’s crossed up and choppy. The energy is pumping at 3960, but it’s a washing machine. This is when it gets serious. Thursday the 20th pushes up to 10ft, but the conditions are just poor. If you’re an expert, you might find a sneaky one, but it’s really not for the faint-hearted. This is expert territory and even then, it’s not going to be fun. Honestly, with that onshore wind and that size, the setup looks more interesting for kite surfing than paddle surfing.

We get a bit of relief in the swell size on Friday the 21st, dropping to 6ft, but a fresh cross-shore breeze kicks in, making it lumpy and hard to read. Again, it’s a battle. The weekend of the 22nd and 23rd isn’t much better, with moderate cross-onshore winds and a lumpy, choppy ocean. The swell stays around the 7ft mark, but it’s not clean.

Now, here’s where you need to be patient. The run of swell is relentless, but the wind is the problem. It isn’t until the tail end of the period, around Thursday the 27th, that we start to see a glimmer of hope. The wind eases a touch, but it’s still cross-onshore. The energy is still solid, but it’s not clean.

Finally, the standout – and I mean the only real standout – is Saturday the 29th of August. The breeze finally eases right off to a light 6 mph ESE cross-onshore breeze. It’s not offshore, but it’s light enough to keep the surface reasonably tidy with just small wind ripples. The swell is a clean 5ft with a 14-second period from the SSW. The energy is moderate at 1668, but the extra-clean conditions will make it feel better than the numbers suggest. This is the morning to be out there. It won’t be epic, but it will be the most user-friendly conditions of the whole fortnight. Green Ball is a reef break, and with the light wind, you’ll actually be able to find a rhythm. It’s a late call, so it’s promising but less certain as a long-range standout, but it’s the one to circle on the calendar.

The last day of the month, Sunday the 30th, also looks like it could offer a similar window. The wind is set to be a gentle 9 mph and the swell is on the push again, around 6-7ft. The energy is strong, around 3032-3600. It won’t be as clean as Saturday, but it’s a backup if you miss the window. The period ends with a big 10ft pulse on Monday the 31st, but with a light cross-onshore wind. That’s a lot of water moving, and at 10ft, that is strictly for the experts. It’s a dangerous one.

So, that’s the run-down. Get out there Saturday the 29th and maybe Sunday the 30th if you’re keen. The rest is a grind. A lot of swell, but not a lot of quality. Keep it on your radar, but don’t force it.

Rusty.

Short Range Forecast

Mostly dry. Warm (max 25°C on Sat night, min 25°C on Sat night). Wind will be generally light.

Days 5-7 Weather Summary

Mostly dry. Warm (max 25°C on Tue night, min 25°C on Tue night). Mainly fresh winds.

Sunday
16
Monday
17
Tuesday
18
Wednesday
19
Thursday
20
Friday
21
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
1
3
1
1
2
1
2
2
1
3
2
0
0
0
0
1
2
0
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
2.3
SSW
16
2.2
SSW
16
2
SSW
15
1.7
SSW
14
1.6
SSW
14
1.5
SSW
14
1.3
SSW
13
1.8
SW
16
1.7
SW
16
1.9
SW
16
2.5
SW
18
2.5
SW
17
3
SW
17
3
SW
16
2.5
SW
16
2.4
SW
16
1.9
SW
15
2.5
SSW
17
2.5
SSW
16
Wave Graph
Metric surfscale
Energy kJ
2620
2325
1811
1191
1042
862
590
1693
1449
1845
3883
4393
5160
4209
3499
2658
1563
3580
3319
Wind (km/h)
15
ESE
15
ESE
20
ESE
20
ESE
20
ESE
15
ESE
20
ESE
20
ESE
20
ESE
20
ESE
20
ESE
20
ESE
20
ESE
25
ESE
20
ESE
25
ESE
30
ESE
25
SE
30
ESE
Wind State
cross-on
cross
cross-on
cross-on
cross
cross-on
cross
cross
cross-on
cross
cross-on
cross-on
cross-on
cross-on
cross-on
cross
cross
cross-on
cross-on
High Tide
00:00AM2.59m
12:07PM2.53m
00:30AM2.63m
12:41PM2.35m
00:59AM2.59m
1:12PM2.14m
1:27AM2.49m
1:42PM1.90m
1:56AM2.34m
2:12PM1.67m
2:26AM2.16m
2:47PM1.44m
3:05AM1.97m
Low Tide
6:04AM0.27m
6:15PM0.16m
6:41AM0.29m
6:42PM0.29m
7:17AM0.37m
7:07PM0.44m
7:53AM0.51m
7:30PM0.62m
8:31AM0.68m
7:50PM0.80m
9:18AM0.86m
8:06PM0.98m
clear
clear
clear
clear
clear
clear
clear
part cloud
clear
part cloud
clear
clear
part cloud
clear
clear
clear
clear
clear
rain showers
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:28
6:28
6:28
6:28
6:26
6:26
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:17
6:17
6:17
6:17
6:17
6:17
6:17
 mm
1
Temp °C
25
25
25
25
25
25
25
25
25
25
25
25
25
25
25
25
25
25
25
Feels °C
26
27
26
27
26
26
27
25
26
26
26
24
26
25
24
25
25
24
24
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
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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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