Surf Forecasts:
Kandui Left surf forecast from 13 Aug 2026:
- Best quality surf: Friday 14 Aug, 10PM (local time) - 7ft (2.1m), 15s period, S swell with glassy winds.
- Most powerful swell: Tuesday 18 Aug, 10PM (local time) - 8ft (2.5m), 19s period, SSW swell with 5,329 kJ wave energy.
- Next surfable swell (1★+): Friday 14 Aug, 10PM (local time) - 7ft (2.1m), 15s period with S swell.
Best Forecast Surf Conditions for Kandui Left this week:
The surf forecast for Kandui Left over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Friday (Aug 14) at 10PM. The primary swell is predicted to be 2.1m and 15s period with a secondary swell of 0.6m and 20s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Kandui Left in the next 16 days are 2.5m 19s and forecast to arrive on Tuesday (Aug 18) at 10PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 4s period and expected on Tuesday (Aug 18) at 7AM.
| Wave Type | Time (WIB) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 10PM (Fri 14th Aug) | 7ft (2.1m) 15s |
| Best Surf | 10PM (Fri 14th Aug) | 7ft (2.1m) 15s |
| Most Powerful | 10PM (Tue 18th Aug) | 8ft (2.5m) 19s |
Table - best surf conditions forecast for Kandui Left over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s have a look at what’s coming down the pipe for Kandui Left. We’ve got a solid run of south swell energy lining up, but honestly, it’s a bit of a mixed bag with the wind most days. The water’s sitting at a warm 85°, which is about average for this time of year, so nothing wild there.
The first real standout I see is Saturday morning, the 15th of August. The swell hangs at 5 ft from the south, with a period of 14 seconds, so there’s some proper groundswell in the water. The combined energy is strong at 1662, and the kicker here is the wind: light from the east-northeast, blowing offshore. It’s going to be clean, with that smooth, open face Kandui Left is famous for. This one’s the pick of the first week for sure. Crowds are always an issue here, so get out early.
Before that, things are a bit rough. Thursday the 13th and Friday the 14th have cross-shore and cross-onshore winds with a moderate chop, so the quality’s not there despite some decent-sized swell (6 ft to 8 ft). Saturday afternoon the 15th drops to light cross-shore but the swell backs off a touch.
Sunday the 16th and Monday the 17th get smaller, around 4 ft to 5 ft, with periods still long (14-15 seconds), but the wind stays more cross and cross-on, keeping it average. You’d be scratching for a decent wave.
Tuesday the 18th sees a pulse of new south-southwest swell push back in, hitting 7 ft in the morning and 6 ft in the afternoon, but the period jumps to 19 seconds in the arvo – that’s very long period stuff. Combined energy is massive at 3763, but with that long period, it’ll be a bit straighty at the break, better for a reef point like this one. Wind is light and cross-shore, so conditions are passable.
Now, Wednesday the 19th of August is the big one on the charts, but it comes with a caveat. Swell hits a solid 10 ft from the south-southwest, 18-second period, and the combined energy is monstrous at 4988 in the afternoon. That’s strong to very strong energy. But the wind is moderate from the south-southeast, blowing cross-shore in the morning and cross-on in the afternoon, with a cross-chop. For experienced surfers only – this is heavy, powerful, and will be tricky. Not a day for beginners.
Thursday the 20th keeps the size at 8 ft to 8 ft, but the wind stays moderate and cross/cross-on, so it’s a bit raw. Friday the 21st is similar, 7 ft to 7 ft, with gentle cross-shore in the morning, making it the better of those two days.
The rest of the run into the last week of August sees the swell slowly drop back from 6 ft on the 23rd down to 4 ft by the 25th. Winds are mostly cross or cross-on, with some moderate breezes and a chop. There’s nothing that jumps out as a must-surf in the second half.
Overall, the clear winner is Saturday morning, the 15th of August – clean offshore, solid south swell, and classic Kandui Left shape. The Wednesday the 19th session is for the pros only, and if you miss the 15th, the Tuesday the 18th or Friday the 21st mornings are your next best bets with lighter winds.
Stay stoked.
Rusty.
Short Range ForecastHeavy rain (total 25mm), heaviest during Thu night. Warm (max 28°C on Thu morning, min 26°C on Thu night). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 9mm), mostly falling on Sun night. Warm (max 28°C on Mon afternoon, min 26°C on Sun night). Wind will be generally light. | ||||||||||||||||||||
Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | Monday 17 | Tuesday 18 | Wednesday 19 | |||||||||||||||
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) | S 14 | S 18 | S 17 | S 16 | S 15 | S 14 | S 14 | S 13 | S 15 | S 15 | S 15 | SSW 14 | SSW 14 | SSW 14 | SW 21 | SSW 16 | SSW 19 | SSW 19 | SSW 18 | SSW 18 | SSW 17 |
Wave Graph | |||||||||||||||||||||
1303 | 1925 | 2316 | 2819 | 2465 | 1468 | 915 | 757 | 1190 | 865 | 711 | 724 | 724 | 580 | 898 | 2568 | 2067 | 4941 | 4777 | 4924 | 4499 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-on | cross | cross | cross-on | glassy | off | cross | cross | cross | cross-on | cross-on | cross | cross | cross | cross | cross | cross | cross | cross-on | cross |
High Tide | 7:03PM0.97m | 7:14AM1.30m | 7:43PM1.05m | 7:53AM1.24m | 8:22PM1.11m | 8:30AM1.15m | 9:00PM1.12m | 9:05AM1.03m | 9:38PM1.10m | 9:38AM0.90m | 10:17PM1.05m | 10:09AM0.77m | 11:00PM0.97m | ||||||||
Low Tide | 00:40AM0.06m | 1:31PM-0.01m | 1:26AM0.06m | 2:01PM-0.01m | 2:09AM0.08m | 2:31PM0.02m | 2:50AM0.13m | 2:59PM0.05m | 3:30AM0.20m | 3:27PM0.10m | 4:11AM0.27m | 3:57PM0.15m | |||||||||
6:26 | — | — | 6:26 | — | — | 6:26 | — | — | 6:24 | — | — | 6:24 | — | — | 6:24 | — | — | 6:24 | — | — | |
— | 6:29 | — | — | 6:29 | — | — | 6:28 | — | — | 6:28 | — | — | 6:28 | — | — | 6:28 | — | — | 6:28 | — | |
mm | — | — | 10 | 1 | 7 | 6 | — | — | 1 | 1 | 2 | 5 | — | — | — | — | — | 1 | — | — | 3 |
Temp °C | 28 | 28 | 28 | 27 | 27 | 26 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 28 | 27 | 28 | 28 | 27 | 28 | 28 | 28 |
Feels °C | 29 | 29 | 30 | 29 | 30 | 29 | 31 | 30 | 30 | 31 | 30 | 30 | 29 | 30 | 29 | 31 | 30 | 28 | 29 | 29 | 29 |
Swell 1 Height (m) Direction Period (s) | S 14 | S 18 | S 17 | S 16 | S 15 | S 14 | S 14 | S 13 | S 15 | S 15 | S 15 | SSW 14 | SSW 14 | SSW 14 | SSW 13 | SSW 16 | SSW 16 | SSW 19 | SSW 18 | SSW 18 | SSW 17 |
1303 | 1925 | 2316 | 2819 | 2465 | 1468 | 915 | 757 | 1190 | 865 | 711 | 724 | 724 | 580 | 531 | 2568 | 1613 | 4941 | 4777 | 4924 | 4499 | |
Swell 2 Height (m) Direction Period (s) | S 18 | S 12 | WNW 11 | SSW 22 | SSW 20 | SW 16 | SSW 17 | S 16 | SW 16 | SW 15 | SW 15 | WNW 8 | SW 24 | SSW 19 | SSW 18 | WNW 8 | SSW 19 | W 10 | W 10 | WNW 10 | WNW 10 |
784 | 675 | 12 | 91 | 237 | 203 | 516 | 438 | 295 | 266 | 212 | 14 | 197 | 214 | 705 | 14 | 2067 | 8 | 18 | 10 | 21 | |
Swell 3 Height (m) Direction Period (s) | WNW 10 | SW 15 | SSW 23 | WNW 11 | WNW 11 | SSW 20 | S 18 | SW 16 | WNW 10 | WNW 9 | WNW 9 | SW 26 | SSW 19 | SW 24 | SW 21 | S 10 | W 8 | W 10 | — | — | — |
11 | 54 | 53 | 12 | 12 | 298 | 231 | 302 | 10 | 17 | 16 | 26 | 72 | 142 | 898 | 30 | 21 | 2 | — | — | — | |
Wind waves Height (m) Direction Period (s) | — | — | S 11 | SSE 11 | — | — | — | — | — | — | — | — | SSE 4 | SSE 4 | SSE 4 | SSE 5 | SSE 9 | S 8 | SW 10 | SW 10 | SSE 5 |
— | — | 441 | 337 | — | — | — | — | — | — | — | — | 8 | 10 | 12 | 16 | 62 | 64 | 49 | 54 | 42 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 156 | 105 | 9 | 9 | 6 | 0 | 0 | 6 | 6 | 6 | 6 | 31 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 387 | 6 |
Best forecast wave conditions in Mentawi Islands | |||||||||||||||||||||
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Information about the Kandui Left Surf forecast
The above surf forecast table for Kandui Left provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Kandui Left can be found by selecting the local surf guide option on the grey menu. Our Kandui Left 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 (Kandui Left) 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 Kandui Left 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.











