
Surf Forecasts:
Impossibles surf forecast from 12 Sep 2026:
- Best quality surf: Saturday 12 Sep, 8PM (local time) - 3.5ft (1.1m), 19s period, SW swell with offshore winds.
- Most powerful swell: Sunday 13 Sep, 2PM (local time) - 7ft (2.1m), 17s period, SW swell with 2,683 kJ wave energy.
- Next surfable swell (1★+): Saturday 12 Sep, 5PM (local time) - 4.5ft (1.4m), 14s period with SW swell.
Best Forecast Surf Conditions for Impossibles this week:
The surf forecast for Impossibles over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Saturday (Sep 12) at 5PM. The primary swell is predicted to be 1.4m and 14s period with a secondary swell of 0.8m and 21s. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Impossibles in the next 16 days are 2.1m 17s and forecast to arrive on Sunday (Sep 13) at 2PM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.2m 6s period and expected on Thursday (Sep 17) at 2PM.
| Wave Type | Time (WITA) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5PM (Sat 12th Sep) | 4.5ft (1.4m) 14s |
| Best Surf | 8PM (Sat 12th Sep) | 3.5ft (1.1m) 19s |
| Most Powerful | 2PM (Sun 13th Sep) | 7ft (2.1m) 17s |
Table - best surf conditions forecast for Impossibles over the next 16 days.
The Lowdown
G’day, Rusty here. Let’s get straight into it, because this stretch has some serious pulse in the water.
We’re looking at a solid run of groundswell, with the swell direction sitting right in the sweet spot for Impossibles. The water’s sitting at 79°, which is pretty much bang on average for this time of year, so no surprises there, just your typical warm water.
The action kicks off on Saturday the 12th. It’s not huge, but it’s clean. We’ve got a 5ft SW groundswell rolling in with a 14-second period. The offshore ESE breeze is keeping it glassy, and the combined energy is strong at 1727. This is a solid start for experienced surfers – the reef will be doing its thing, and the lines should be holding up nicely. Saturday afternoon eases off a touch but stays clean.
Sunday the 13th is where things start to step up. The swell pushes to 6ft in the morning and then 7ft in the afternoon, with the period stretching out to 18 seconds. That’s proper groundswell, and the energy jumps to 2512, then 2625. Still offshore, still clean. This is quality stuff.
Monday the 14th keeps the momentum with 6ft and 6ft waves, but the afternoon session has a bit of a question mark over it, tide-wise. Nothing to stress about, but the morning is the pick.
Tuesday the 15th and Wednesday the 16th are more of the same – consistent, clean, and fun. The swell direction swings a little more SSW, and the period drops to around 15 seconds, which is still plenty of push. The energy stays in the 1200-1500 range. The morning sessions are all excellent; afternoons are good but not quite as crisp.
Thursday the 17th sees a slight bump back up to 6ft, and the wind gets a touch more cross-off in the afternoon. Still rideable, but the morning is where you want to be.
Friday the 18th is a bit of a breather. The swell drops to 5ft in the morning and 3ft in the afternoon. The wind is light and offshore, which is great, but the energy dips to 903. It’s still a fun wave, but you’ll be working for it.
Saturday the 19th and Sunday the 20th see the swell rebuild. Sunday is the standout of this little run – it jumps back to 7ft and 7ft with a 16-second period and energy pushing over 2000. The wind is light offshore, and the reef will be firing. This is proper Impossibles.
Monday the 21st and Tuesday the 22nd keep the quality high, with 6ft and 6ft waves and clean offshore conditions all day. Consistent, powerful, and lined up.
Now, here’s where things get interesting. Wednesday the 23rd brings a jump in size and energy. The morning is 7ft with the energy pushing 3470, and while the afternoon is bigger at 8ft, the cross-off wind makes it a bit messier. This is still a day for experienced surfers only.
Thursday the 24th has a bit of a mixed bag, with the morning more marginal, but the afternoon comes back clean with 6ft and offshore wind.
And then we get to the real monster of the run. Friday the 25th. The morning is clean with 6ft, but the afternoon is where it explodes. The swell jumps to 10ft with a 19-second period, and the combined energy is a massive 7490. That is serious, serious power. This is not for the faint-hearted. The cross-off wind will make it challenging, but for the very experienced, this is the day.
Saturday the 26th remains big, with 10ft in the morning and 8ft in the afternoon, but the energy drops back a bit. The morning session is clean and still very, very heavy. This is expert territory, full stop.
Sunday the 27th winds it down, with 7ft and 7ft waves and lighter winds. Still a solid, powerful swell, but the peak of the energy has passed.
So, the best of the best? It’s hard to look past Friday the 25th afternoon and Saturday the 26th morning for sheer size and power, but that’s for the crew who know what they’re doing on a big, hollow reef. For the more manageable, high-quality session, Sunday the 20th morning with that 7ft SW groundswell, 16-second period, and clean offshore wind is easily the pick for a day of proper, grinding waves.
Stay safe out there, and don’t be a hero if you’re not ready for it.
Rusty.
Short Range ForecastMostly dry. Warm (max 25°C on Sat afternoon, min 24°C on Sat night). Wind will be generally light. | Days 5-7 Weather SummaryLight rain (total 2mm), mostly falling on Tue night. Warm (max 25°C on Tue afternoon, min 25°C on Tue afternoon). Wind will be generally light. | |||||||||||||||||||
Sat 12 | Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | ||||||||||||||
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) | SW 14 | SW 19 | SW 18 | SW 17 | SW 16 | SW 16 | SW 16 | SW 15 | SW 15 | SW 15 | SW 15 | SSW 15 | SSW 15 | SSW 15 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | SW 16 | SW 15 |
Wave Graph | ||||||||||||||||||||
763 | 1944 | 2065 | 2561 | 1978 | 1494 | 1402 | 1331 | 1455 | 1251 | 1341 | 1158 | 1279 | 1546 | 1370 | 1351 | 1159 | 957 | 483 | 881 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | off | off | off | off | off | off | off | off | off | off | off | off | off | off | cross-off | off | off | off | off |
High Tide | 10:56PM2.67m | 11:12AM2.54m | 11:23PM2.75m | 11:43AM2.44m | 11:50PM2.75m | 12:12PM2.30m | 00:16AM2.68m | 12:40PM2.12m | 00:41AM2.55m | 1:06PM1.91m | 1:06AM2.37m | 1:32PM1.70m | 1:33AM2.17m | |||||||
Low Tide | 4:45PM0.18m | 5:06AM0.15m | 5:12PM0.21m | 5:39AM0.10m | 5:38PM0.27m | 6:11AM0.13m | 6:02PM0.37m | 6:41AM0.23m | 6:25PM0.50m | 7:11AM0.39m | 6:46PM0.65m | 7:43AM0.58m | 7:04PM0.82m | |||||||
— | — | 6:15 | — | — | 6:13 | — | — | 6:13 | — | — | 6:13 | — | — | 6:11 | — | — | 6:11 | — | — | |
6:15 | — | — | 6:15 | — | — | 6:15 | — | — | 6:15 | — | — | 6:15 | — | — | 6:15 | — | — | 6:15 | — | |
mm | — | — | — | — | — | — | — | — | — | — | 1 | — | — | 1 | — | — | — | — | — | 1 |
Temp °C | 25 | 25 | 24 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 |
Feels °C | 26 | 25 | 25 | 25 | 26 | 25 | 25 | 25 | 26 | 25 | 26 | 26 | 26 | 26 | 26 | 26 | 27 | 27 | 26 | 26 |
Swell 1 Height (m) Direction Period (s) | SW 14 | SW 19 | SW 18 | SW 17 | SW 16 | SW 16 | SW 16 | SW 15 | SW 15 | SW 15 | SW 15 | SSW 15 | SSW 15 | SSW 15 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | SW 13 | SW 15 |
763 | 1944 | 2065 | 2561 | 1978 | 1494 | 1402 | 1331 | 1455 | 1251 | 1341 | 1158 | 1279 | 1546 | 1370 | 1351 | 1159 | 957 | 376 | 881 | |
Swell 2 Height (m) Direction Period (s) | SW 21 | SW 14 | SW 14 | — | — | — | — | — | — | — | S 5 | S 6 | S 6 | — | SSW 18 | SSW 8 | SE 6 | SW 21 | SW 16 | SW 20 |
522 | 529 | 447 | — | — | — | — | — | — | — | 14 | 18 | 20 | — | 280 | 49 | 38 | 18 | 483 | 98 | |
Swell 3 Height (m) Direction Period (s) | NE 6 | — | — | — | — | — | — | — | — | — | — | W 16 | SW 20 | — | — | — | — | S 7 | S 7 | SSW 20 |
2 | — | — | — | — | — | — | — | — | — | — | 5 | 61 | — | — | — | — | 27 | 27 | 38 | |
Wind waves Height (m) Direction Period (s) | SE 6 | SE 6 | SE 6 | SE 6 | SE 6 | SE 6 | SE 6 | SE 6 | SSE 5 | SE 6 | SE 6 | SE 6 | SE 6 | SE 6 | SE 6 | SE 6 | — | SE 6 | SE 6 | ESE 6 |
43 | 33 | 51 | 62 | 92 | 67 | 90 | 67 | 36 | 49 | 32 | 38 | 38 | 44 | 46 | 56 | — | 20 | 20 | 13 | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 0 | 0 | 13 | 0 | 38 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 1 |
Best forecast wave conditions in The Bukit - Bali | ||||||||||||||||||||
Best forecast wave conditions in Indonesia | ||||||||||||||||||||
Header Global | ||||||||||||||||||||
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Information about the Impossibles Surf forecast
The above surf forecast table for Impossibles provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Impossibles can be found by selecting the local surf guide option on the grey menu. Our Impossibles 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 (Impossibles) 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 Impossibles 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.
Impossibles is 12 km (7 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.










