
Surf Forecasts:
Keramas surf forecast from 14 Sep 2026:
- Best quality surf: Sunday 20 Sep, 5AM (local time) - 5ft (1.6m), 17s period, SSW swell with glassy winds.
- Most powerful swell: Sunday 20 Sep, 11PM (local time) - 6.5ft (2.0m), 16s period, SSW swell with 1,856 kJ wave energy.
- Next surfable swell (1★+): Friday 18 Sep, 8AM (local time) - 5ft (1.6m), 14s period with SSW swell.
Best Forecast Surf Conditions for Keramas this week:
The surf forecast for Keramas over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Friday (Sep 18) at 8AM. The primary swell is predicted to be 1.6m and 14s period with a secondary swell of 0.7m and 5s. Another secondary swell of 0.9m and 5s is also forecast. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Keramas in the next 16 days are 2.0m 16s and forecast to arrive on Sunday (Sep 20) 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+) | 8AM (Fri 18th Sep) | 5ft (1.6m) 14s |
| Best Surf | 5AM (Sun 20th Sep) | 5ft (1.6m) 17s |
| Most Powerful | 11PM (Sun 20th Sep) | 6.5ft (2.0m) 16s |
Table - best surf conditions forecast for Keramas over the next 16 days.
The Lowdown
Alright, Rusty here, lookin’ at the charts for the next couple weeks. Let’s be straight with ya – Keramas has got a bit of a tricky run ahead. The swell’s gonna be around, but it’s fighting against some cross-onshore winds for a good chunk of the time, which is going to mess with that usually perfect face. The water temp feels pretty average for this time of year, nothing wild there.
Right now, from Tuesday the 15th right through to Saturday the 20th, it’s a bit of a grind. We’ve got consistent 5ft to 6ft SSW groundswell rolling in with a nice long 14 to 16 second period – that’s proper energy there (moderate to strong combined energy, 791-1762). But the wind is a real buzzkill. Mostly a gentle 9 mph cross-onshore from the SE, turning onshore in the afternoons. It’s making for a pretty choppy, messy surface. The scores are low – it’s surfable, but you’ll be fighting for the clean ones. Not a standout period at all.
Now, we get into Sunday the 21st and Monday the 22nd. The swell backs off a touch, dropping to 4ft to 6ft, but the wind lightens up to 6 mph onshore from the SSE. It’s a bit cleaner, but still not the Keramas we dream about. The energy’s dropping too, so the grins will be a bit harder to find.
Here’s where things get interesting. For Wednesday the 23rd and Thursday the 24th, the swell picks back up, 6ft to 6ft of that long period SSW swell (combined energy around 1094 to 1619 – still solid). But there it is again – a 9 mph cross-onshore wind. It’s a pattern.
Then we hit a bit of a lull from Friday the 25th into Saturday the 26th morning – still 6ft to 7ft of swell, but the wind stays on it. It’s not terrible, just not firing on all cylinders.
But hold onto your board, because Sunday the 27th of September is the one. That’s the standout. We’ve got a solid 10ft SSW groundswell with an 18-second period. That’s a massive, powerful, very long-period groundswell. The combined energy is through the roof at 5908 – that’s very strong energy. Now, the wind is a gentle 9 mph onshore from the SE in the morning, lightening up to 6 mph onshore in the arvo. For a wave that size and power, that onshore wind is going to blow the top off it. This is big, heavy, expert-only territory. Over 8ft, and at 10ft, it’s only for the very experienced crew who know that reef. The long period will make it a freight train at Keramas – a proper reef, so it can handle that energy, but don’t expect the usual silky walls. It will be big, raw, and powerful. The crowd will be there, it always is when it’s big.
Monday the 28th drops to 8ft with a 16-second period – still expert level, but more manageable. The rest of the week into the 30th settles back to the 5ft to 5ft range with the same onshore wind story.
So, the call: The only real standout on the cards is that Sunday the 27th, but it’s one for the experts only. For everyone else, the whole forecast window is more about chasing a window of clean, workable waves than scoring perfection. Keep an eye on the wind; if it ever clocks offshore from the NNW, that’s the go button. Until then, it’s a waiting game.
Rusty.
Short Range ForecastLight rain (total 2mm), mostly falling on Wed night. Warm (max 28°C on Tue morning, min 24°C on Mon night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 29°C on Fri morning, min 24°C on Thu night). Wind will be generally light. | ||||||||||||||||||
Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | Sunday 20 | ||||||||||||||
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 15 | SSW 15 | SSW 14 | SSW 15 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | SSW 17 | SSW 16 | SSW 16 | SSW 16 |
Wave Graph | |||||||||||||||||||
1178 | 1147 | 1178 | 1125 | 1024 | 1130 | 1275 | 1374 | 1223 | 1023 | 854 | 733 | 630 | 585 | 487 | 807 | 1536 | 1743 | 1743 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | on | cross-on | cross-on | on | cross-on | on | on | cross-on | on | on | cross-on | on | on | cross-on | on | on | cross |
High Tide | 00:08AM2.10m | 12:37PM1.62m | 00:32AM2.05m | 1:07PM1.45m | 00:57AM1.97m | 1:35PM1.28m | 1:21AM1.85m | 2:05PM1.12m | 1:48AM1.72m | 2:52PM0.97m | 2:21AM1.58m | 3:46AM1.45m | |||||||
Low Tide | 6:40AM0.26m | 6:16PM0.53m | 7:14AM0.32m | 6:35PM0.62m | 7:49AM0.43m | 6:49PM0.72m | 8:30AM0.57m | 6:55PM0.82m | 9:28AM0.71m | 6:27PM0.91m | 11:58AM0.78m | ||||||||
— | 6:11 | — | — | 6:11 | — | — | 6:11 | — | — | 6:11 | — | — | 6:09 | — | — | 6:09 | — | — | |
6:15 | — | 6:15 | — | — | 6:15 | — | — | 6:15 | — | — | 6:15 | — | — | 6:14 | — | — | 6:14 | — | |
mm | — | — | — | — | — | — | 2 | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 24 | 28 | 27 | 24 | 28 | 28 | 25 | 28 | 28 | 25 | 29 | 29 | 24 | 29 | 28 | 24 | 28 | 28 | 25 |
Feels °C | 26 | 29 | 27 | 27 | 30 | 29 | 28 | 30 | 29 | 28 | 31 | 31 | 27 | 31 | 30 | 28 | 30 | 29 | 29 |
Swell 1 Height (m) Direction Period (s) | SSW 15 | SSW 15 | SSW 15 | SSW 15 | SSW 15 | SSW 14 | SSW 15 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | SSW 17 | SSW 16 | SSW 16 | SSW 16 |
1178 | 1147 | 1178 | 1125 | 1024 | 1130 | 1275 | 1374 | 1223 | 1023 | 854 | 733 | 630 | 585 | 487 | 807 | 1536 | 1743 | 1743 | |
Swell 2 Height (m) Direction Period (s) | NE 7 | NE 7 | NE 7 | NE 7 | SW 21 | NE 7 | S 6 | SSW 18 | S 7 | SE 6 | SW 22 | SE 6 | SE 6 | SSW 19 | SW 18 | SSW 13 | SE 7 | SE 6 | SE 6 |
8 | 7 | 8 | 8 | 18 | 7 | 20 | 127 | 26 | 27 | 18 | 16 | 16 | 137 | 330 | 362 | 21 | 19 | 19 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | W 16 | — | — | — | — | — | NE 6 | SSW 21 | SSW 20 | NE 6 | NE 6 | SE 6 | — | — | SSW 8 |
— | — | — | — | 5 | — | — | — | — | — | 2 | 42 | 38 | 2 | 1 | 12 | — | — | 24 | |
Wind waves Height (m) Direction Period (s) | SE 6 | SE 5 | SE 6 | SE 6 | SE 5 | SE 5 | SE 5 | SE 5 | SE 6 | — | SE 5 | — | SE 6 | SE 5 | SE 5 | ESE 6 | — | — | SE 6 |
62 | 56 | 60 | 50 | 45 | 41 | 28 | 32 | 31 | — | 22 | — | 34 | 7 | 6 | 22 | — | — | 40 | |
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 | |||||||||||||||||||
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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.










