Surf Forecasts:
Keramas surf forecast from 18 Aug 2026:
- Most powerful swell: Wednesday 19 Aug, 11PM (local time) - 8ft (2.5m), 17s period, SSW swell with 3,727 kJ wave energy.
Best Forecast Surf Conditions for Keramas this week:
The most powerful waves expected at Keramas in the next 16 days are 2.5m 17s and forecast to arrive on Wednesday (Aug 19) 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 (Wed 19th Aug) | 8ft (2.5m) 17s |
Table - best surf conditions forecast for Keramas over the next 16 days.
The Lowdown
Alright, this is Rusty talking, and we’re looking at the waves for the next couple of weeks.
We’ve got a solid run of swell heading to Keramas (Bali). This is a reef break that’s very consistent, exposed to the SSW swell, which is the right direction. The water temp is about average for this time of year. The wind is the main factor here, and it’s a bit of a pain.
We kick off on Wednesday, August 19th, with a 7ft groundswell from the SSW, with a very long period of 18 seconds. The energy is strong at 3092. The morning has a light cross-onshore breeze from the SE at 6 mph, leaving some small ripples. It’s surfable, but not clean. By the afternoon, the wind picks up to 9 mph from the ESE, making it choppier. The swell bumps to 8ft but the quality drops. The tide is also a factor here.
Thursday, August 20th, is similar. The morning has a 8ft SSW swell with a 16-second period (energy 3216), but again that light cross-onshore. The afternoon is a downgrade. For the next several days, the pattern holds: decent sized swell, but constant onshore or cross-onshore winds from the SE. The swell is over 1.5m (5ft), so it’s not for beginners, and it pushes over 2.5m (8ft) at times, making it expert territory.
The best moment is probably the morning of Friday, August 21st. The wind is straight onshore from the SE, but the swell drops to 5ft with a solid 17-second period (energy 2213). It’s marginal, but if the wind shifts to the NNW, this place would be perfect. As it is, it’s a bit of a fight.
From Saturday, August 22nd, through to the end of the month, the swell is smaller, generally between 4ft and 6ft. The wind remains a persistent SE breeze, mostly cross-on or onshore. The energy drops from 2171 down to 668 by the 26th. The period is also dropping from 16 seconds down to 13-14 seconds, so the quality fades.
There’s a little bump around Friday, August 28th, with the swell returning to 7ft from the SSW with a 16-second period (energy 2341). The wind is still cross-on in the morning, but the afternoon sees a lighter onshore breeze from the SSE at 6 mph. It’s an option, but not a classic.
Into the first week of September, the swell is hanging around 4ft to 6ft from the SSW/SW. Periods are 14-17 seconds, so there’s energy, but the wind is still a constant SE breeze. This whole period is plagued by marginal conditions and questionable tides. Crowds at Keramas are “sometimes” busy, so you might have some company.
Honestly, if you’re looking for clean, glassy glass, this isn’t the window. The swell is there, but the wind is ruining it. The best of the bunch is the morning of August 19th with the big 18-second swell, or the morning of August 28th if you can handle the cross-on. The conditions are more of a workout than a dream session. It’s a tough stretch.
Keep your eyes peeled, forecasts can change. For now, it’s a waiting game.
Rusty.
Short Range ForecastMostly dry. Warm (max 29°C on Wed afternoon, min 23°C on Tue night). Wind will be generally light. | Days 5-7 Weather SummaryLight rain (total 2mm), mostly falling on Sun night. Warm (max 27°C on Sat afternoon, min 23°C on Fri night). Wind will be generally light. | ||||||||||||||||||
Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | ||||||||||||||
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 18 | SSW 17 | SSW 17 | SSW 16 | SSW 16 | SSW 16 | SSW 17 | SSW 17 | SSW 16 | SSW 16 | SSW 16 | SSW 15 | SSW 15 | SSW 15 | SSW 14 | SSW 16 | SSW 16 | SSW 14 |
Wave Graph | |||||||||||||||||||
1169 | 3022 | 3467 | 3640 | 3113 | 2510 | 1957 | 1312 | 2723 | 2329 | 2080 | 1780 | 1471 | 1471 | 1220 | 1076 | 1551 | 1393 | 789 | |
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 | on | cross-on | cross-on | cross-on | on | cross-on | cross-on | on | cross-on | cross-on | on | cross-on |
High Tide | 1:49AM1.92m | 2:06PM1.31m | 2:17AM1.83m | 2:41PM1.11m | 2:50AM1.72m | 3:46PM0.94m | 3:39AM1.60m | 5:29AM1.52m | 7:26AM1.57m | 10:32PM1.25m | |||||||||
Low Tide | 8:30AM0.57m | 7:36PM0.67m | 9:20AM0.67m | 7:45PM0.79m | 10:35AM0.76m | 7:25PM0.88m | 1:36PM0.74m | 2:59PM0.61m | 3:32PM0.48m | 2:25AM1.12m | |||||||||
— | 6:26 | — | — | 6:26 | — | — | 6:26 | — | — | 6:24 | — | — | 6:24 | — | — | 6:24 | — | — | |
6:16 | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 1 | — | — |
Temp °C | 24 | 28 | 29 | 24 | 27 | 28 | 24 | 27 | 27 | 24 | 26 | 27 | 24 | 27 | 27 | 24 | 26 | 27 | 24 |
Feels °C | 26 | 30 | 30 | 27 | 28 | 28 | 26 | 28 | 27 | 26 | 27 | 27 | 26 | 28 | 27 | 28 | 26 | 27 | 25 |
Swell 1 Height (m) Direction Period (s) | SSW 16 | SSW 18 | SSW 17 | SSW 17 | SSW 16 | SSW 16 | SSW 16 | SSW 17 | SSW 17 | SSW 16 | SSW 16 | SSW 16 | SSW 15 | SSW 15 | SSW 15 | SSW 14 | SSW 16 | SSW 16 | SSW 14 |
1169 | 3022 | 3467 | 3640 | 3113 | 2510 | 1957 | 1312 | 2723 | 2329 | 2080 | 1780 | 1471 | 1471 | 1220 | 1076 | 1551 | 1393 | 789 | |
Swell 2 Height (m) Direction Period (s) | SSW 19 | SE 6 | NE 7 | NE 8 | SE 7 | NE 7 | SE 7 | SSW 14 | NE 8 | — | — | S 25 | ENE 7 | S 20 | SSW 19 | SSW 18 | SW 21 | SSW 20 | SW 18 |
1055 | 53 | 19 | 20 | 84 | 14 | 102 | 774 | 14 | — | — | 13 | 5 | 202 | 796 | 832 | 18 | 149 | 319 | |
Swell 3 Height (m) Direction Period (s) | SE 6 | NE 7 | — | — | NE 7 | — | NE 8 | SE 7 | — | — | — | S 26 | S 24 | — | SE 6 | — | — | — | SSW 7 |
42 | 17 | — | — | 19 | — | 9 | 127 | — | — | — | 13 | 11 | — | 54 | — | — | — | 29 | |
Wind waves Height (m) Direction Period (s) | ESE 6 | — | SE 7 | ESE 7 | — | SE 7 | ESE 7 | — | SE 7 | SE 6 | SE 6 | SE 7 | SE 6 | SE 6 | SE 6 | SE 6 | SE 6 | SE 6 | SE 6 |
80 | — | 124 | 56 | — | 153 | 236 | — | 112 | 109 | 91 | 84 | 44 | 62 | 80 | 58 | 58 | 75 | 39 | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 |
Best forecast wave conditions in Sanur - Bali | |||||||||||||||||||
Best forecast wave conditions in Indonesia | |||||||||||||||||||
Header Global | |||||||||||||||||||
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Information about the Keramas Surf forecast
The above surf forecast table for Keramas provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Keramas can be found by selecting the local surf guide option on the grey menu. Our Keramas 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 (Keramas) 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 Keramas 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.
Keramas is 10 km (6 miles) from Klungkung. If you plan a holiday in Sanur - Bali, look for hotels and other accommodation in Klungkung. Klungkung has rooms for a wide range of budgets as well as car hire and transport links.











