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 mate, let’s break down what’s coming for Keramas.
We’ve got a solid run of long-period SSW groundswell starting Tuesday, August 18th. The water is about 80°F, which is pretty average for this time of year. The wind is coming from the southeast, putting us in a cross-onshore position for most of the run, so don’t expect glass, but it’s workable.
Tuesday morning starts with a clean 4ft SSW swell with a long 16-second period, and the wave energy is strong at 1867. The wind is light and cross-onshore, leaving a few ripples. It’s surfable. The afternoon builds to 6ft, but the wind picks up and it gets a bit choppier.
Wednesday, August 19th, the swell pushes up nicely. Morning sees 7ft SSW at an 18-second period – that’s proper groundswell, hitting 3085 energy. The cross-onshore breeze is still there, but the sets will be powerful and well-spaced. Afternoon jumps to 8ft at 17 seconds and 3582 energy. It’s getting meaty.
Thursday, August 20th, the swell holds at 8ft in the morning with 16-second period and 2972 energy, still that same cross-onshore wind. The morning’s the cleaner call with a lighter breeze.
Friday, August 21st, we finally get a shift – the morning sees an offshore breeze at 9 mph, and the swell is a clean 5ft at 17 seconds. This is the standout session of the whole forecast. Straight offshore wind, long period lines of swell, and the water will be clean. It’s going to be firing.
The rest of the run from Saturday the 22nd through to Monday the 31st sees the swell bounce between 5ft and 7ft, with periods staying in the 15 to 17-second range. The energy stays moderate to strong, but the wind keeps swinging between light cross-onshore and occasional offshore. Waves every day, but not as clean as that Friday.
Around the end of the month and into September, we see another pulse of 7ft to 8ft SSW swell around September 1st and 2nd, with lighter winds turning more offshore. A nice little bonus.
The pick of the whole run is Friday morning, August 21st. Offshore wind, clean 5ft groundswell, and Keramas doing its thing. Get in early.
Rusty.
Short Range ForecastMostly dry. Warm (max 29°C on Tue afternoon, min 23°C on Tue night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 28°C on Fri morning, min 22°C on Fri night). Wind will be generally light. | ||||||||||||||||||||
Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | |||||||||||||||
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 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 18 | SSW 16 | SSW 16 | SSW 14 |
Wave Graph  | |||||||||||||||||||||
 kJ | 770 | 1626 | 1169 | 3022 | 3467 | 3640 | 2892 | 2510 | 1957 | 1312 | 2692 | 2329 | 2080 | 1780 | 1471 | 1471 | 1220 | 972 | 1411 | 1411 | 956 |
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 | on | cross-on | cross-on | cross-on | on | cross-on | cross-on | on | cross-on | cross-on | on | cross-on |
High Tide | 1:33PM1.51m | 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 | 7:20PM0.55m | 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 | — | — | 6:26 | — | — | 6:24 | — | — | 6:24 | — | — | 6:24 | — | — |
 | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 28 | 29 | 24 | 27 | 28 | 24 | 28 | 28 | 24 | 28 | 28 | 24 | 27 | 27 | 24 | 27 | 27 | 24 | 26 | 27 | 24 |
Feels °C | 30 | 31 | 27 | 28 | 29 | 27 | 30 | 29 | 26 | 29 | 29 | 27 | 28 | 27 | 27 | 28 | 27 | 27 | 27 | 28 | 27 |
Swell 1 Height (m) Direction Period (s) | SSW 16 | SSW 16 | 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 |
| kJ | 770 | 1626 | 1169 | 3022 | 3467 | 3640 | 2892 | 2510 | 1957 | 1312 | 2692 | 2329 | 2080 | 1780 | 1471 | 1471 | 1220 | 930 | 1411 | 1411 | 956 |
Swell 2 Height (m) Direction Period (s) | SSW 13 | SSW 20 | SSW 19 | SE 6 | NE 8 | SE 6 | SE 7 | NE 8 | SE 7 | SSW 14 | NE 8 | — | SE 7 | S 26 | S 24 | SSW 20 | SSW 19 | SSW 18 | SSW 21 | SSW 20 | SSW 18 |
| kJ | 357 | 225 | 1055 | 46 | 20 | 47 | 61 | 20 | 97 | 774 | 9 | — | 86 | 13 | 11 | 339 | 796 | 972 | 44 | 253 | 399 |
Swell 3 Height (m) Direction Period (s) | SSW 21 | NE 7 | NE 7 | NE 7 | — | — | NE 7 | — | — | SE 7 | — | — | — | NE 7 | S 24 | — | SE 6 | SE 6 | — | — | — |
| kJ | 705 | 7 | 16 | 17 | — | — | 19 | — | — | 119 | — | — | — | 9 | 11 | — | 49 | 44 | — | — | — |
Wind waves Height (m) Direction Period (s) | SE 5 | SE 6 | SE 6 | — | SE 6 | — | — | SE 7 | — | — | SE 7 | SE 6 | ESE 7 | SE 7 | SE 6 | SE 6 | — | — | SE 6 | SE 6 | SE 5 |
| kJ | 35 | 61 | 38 | — | 95 | — | — | 147 | — | — | 139 | 101 | 154 | 89 | 49 | 67 | — | — | 50 | 46 | 35 |
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 | 14 | 14 |
Best forecast wave conditions in Sanur - Bali | |||||||||||||||||||||
Best forecast wave conditions in Indonesia | |||||||||||||||||||||
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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.
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