Surf Forecasts:
Kandui Left surf forecast from 25 Aug 2026:
- Best quality surf: Monday 31 Aug, 4AM (local time) - 5.5ft (1.7m), 18s period, SSW swell with cross-offshore winds.
- Most powerful swell: Monday 31 Aug, 10PM (local time) - 7ft (2.2m), 17s period, SW swell with 2,927 kJ wave energy.
- Next surfable swell (1★+): Wednesday 26 Aug, 7AM (local time) - 5ft (1.5m), 13s period with SSW 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 Wednesday (Aug 26) at 7AM. The primary swell is predicted to be 1.5m and 13s period with a secondary swell of 0.8m and 8s. 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 2.2m 17s and forecast to arrive on Monday (Aug 31) at 10PM. Winds are predicted to be cross-shore at the time the swell arrives.
| Wave Type | Time (WIB) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 7AM (Wed 26th Aug) | 5ft (1.5m) 13s |
| Best Surf | 4AM (Mon 31st Aug) | 5.5ft (1.7m) 18s |
| Most Powerful | 10PM (Mon 31st Aug) | 7ft (2.2m) 17s |
Table - best surf conditions forecast for Kandui Left over the next 16 days.
The Lowdown
Alright, let’s get into it. This forecast is all about one spot: Kandui Left. It’s a reef break, pretty consistent, and it gets exposed to the swell. The water temp here is 85.1°F, which is bang on average for this time of year, so no surprises there.
Looking at the whole 16-day window, it starts a bit slow. Tuesday 25 August kicks things off with a 5.9ft SSW swell, but the wind is a light cross-shore, so it’s not terrible but not clean either. The wave energy is sitting at 1439 (moderate). The next couple of days bring in some decent pulses. By Wednesday 26 August morning, the swell drops a bit to 4.6ft from the SSW, but the wind goes glassy – that’s a major positive. The water will be clean, even if the size isn't huge. That morning session is one of the better ones in this early part of the run.
The real standout starts to build from Thursday 27 August. There’s a solid 6.6ft SSW swell in the afternoon with a long 18-second period. That’s proper groundswell energy, and the combined energy jumps to 2636 (strong). The wind is cross-on, so it won't be perfect, but the power is there. Friday 28 August holds onto that energy, with 6.9ft SSW swell and 16-second period in the morning, but again, cross-shore winds keep it from being pristine.
The best day on offer looks like Saturday 29 August morning. Swell is 4.6ft from the SSW with a 14-second period, which is nice, but the big win is the cross-offshore wind from the SE. That means clean, peeled faces on the reef. The combined energy is still a healthy 977 (moderate). It’s not the biggest day, but the quality will be there. Keep in mind, crowds are always a factor at Kandui Left, so expect company.
Now, there's a long gap in top-tier conditions after that. The next real highlight doesn’t appear until Thursday 3 September morning. A 4.6ft SSW swell with another cross-offshore wind (ESE at 6 mph) and a combined energy of 989 (moderate). Clean again. Then Friday 4 September morning looks similar: 5.2ft SSW swell, glassy light cross-off wind, and a combined energy of 853. That’s a classic, smaller, but clean Kandui morning.
Looking way out to Wednesday 9 September morning, there’s a bigger pulse: 6.2ft SSW swell with a 18-second period and cross-offshore wind. The combined energy jumps to 2806 (strong). That’s a promising combo for some proper long lefts, but it’s over a week away, so keep it on the radar but don’t book your flight yet.
To be honest, the first week has a few solid windows, but the standout is Saturday 29 August morning – the cross-off wind makes that session the cleanest of the bunch with enough swell to make it fun. If you can only pick one, that’s the one.
Short Range ForecastHeavy rain (total 21mm), heaviest during Thu night. Warm (max 28°C on Tue afternoon, min 26°C on Tue night). Wind will be generally light. | Days 4-6 Weather SummaryModerate rain (total 19mm), heaviest on Sun morning. Warm (max 28°C on Fri afternoon, min 27°C on Fri morning). Wind will be generally light. | ||||||||||||||||||||
Tuesday 25 | Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | Sunday 30 | Monday 31 | |||||||||||||||
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 15 | SSW 14 | SSW 14 | SSW 13 | SSW 14 | SW 16 | SSW 19 | SSW 18 | SSW 16 | SSW 16 | SSW 15 | SSW 14 | SSW 14 | SSW 14 | SSW 13 | SSW 21 | SSW 19 | SSW 18 | SW 18 | SW 18 | SW 17 |
Wave Graph | |||||||||||||||||||||
1374 | 1072 | 802 | 669 | 690 | 558 | 1315 | 2519 | 2542 | 2049 | 1592 | 961 | 785 | 617 | 545 | 741 | 983 | 1530 | 1996 | 2630 | 2860 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-on | cross | glassy | glassy | cross | cross | cross-on | cross | cross | cross | cross | cross-off | cross | cross | cross | cross-on | cross | cross-on | cross-on | cross |
High Tide | 5:22PM0.67m | 5:23AM1.06m | 5:56PM0.77m | 5:58AM1.12m | 6:27PM0.86m | 6:29AM1.15m | 6:56PM0.96m | 6:59AM1.16m | 7:24PM1.04m | 7:27AM1.14m | 7:52PM1.10m | 7:55AM1.09m | 8:22PM1.14m | ||||||||
Low Tide | 10:20PM0.30m | 11:54AM0.19m | 11:09PM0.23m | 12:15PM0.13m | 11:51PM0.18m | 12:39PM0.08m | 00:30AM0.13m | 1:05PM0.04m | 1:08AM0.09m | 1:32PM0.01m | 1:46AM0.08m | 2:00PM0.00m | 2:25AM0.09m | ||||||||
6:22 | — | — | 6:22 | — | — | 6:22 | — | — | 6:22 | — | — | 6:20 | — | — | 6:20 | — | — | 6:20 | — | — | |
— | 6:25 | — | — | 6:25 | — | — | 6:25 | — | — | 6:25 | — | — | 6:25 | — | — | 6:24 | — | — | 6:24 | — | |
mm | — | — | 5 | 2 | 1 | 3 | 2 | — | 8 | — | — | 3 | 1 | 2 | 2 | 4 | 2 | 5 | 2 | 1 | 5 |
Temp °C | 27 | 28 | 27 | 27 | 27 | 27 | 27 | 28 | 27 | 27 | 28 | 27 | 28 | 28 | 28 | 27 | 27 | 27 | 27 | 27 | 27 |
Feels °C | 30 | 31 | 30 | 31 | 31 | 30 | 30 | 31 | 29 | 30 | 30 | 30 | 31 | 30 | 30 | 30 | 30 | 31 | 30 | 30 | 30 |
Swell 1 Height (m) Direction Period (s) | SSW 15 | SSW 14 | SSW 14 | SSW 13 | SSW 14 | SW 16 | SW 15 | SSW 18 | SSW 16 | SSW 16 | SSW 15 | SSW 14 | SSW 14 | SSW 14 | SSW 13 | SSW 21 | SSW 19 | SSW 18 | SW 18 | SW 18 | SW 17 |
1374 | 1072 | 802 | 669 | 690 | 558 | 773 | 2519 | 2542 | 2049 | 1592 | 961 | 785 | 617 | 545 | 741 | 983 | 1530 | 1996 | 2630 | 2860 | |
Swell 2 Height (m) Direction Period (s) | SSE 7 | SSE 7 | SSE 7 | SSE 8 | SSE 8 | SSW 12 | SSW 19 | — | SSE 7 | SSE 7 | SSE 7 | SSW 18 | WNW 10 | SSW 16 | SSW 21 | SW 13 | S 13 | S 9 | S 12 | S 9 | S 11 |
57 | 65 | 73 | 77 | 77 | 255 | 1315 | — | 114 | 114 | 114 | 107 | 9 | 86 | 300 | 253 | 411 | 164 | 339 | 160 | 269 | |
Swell 3 Height (m) Direction Period (s) | WNW 9 | W 9 | WNW 8 | SW 18 | WNW 8 | SSE 8 | WNW 7 | — | — | WNW 11 | WNW 10 | WNW 10 | SW 22 | SSW 23 | WNW 10 | S 13 | SW 12 | SW 12 | SW 12 | S 11 | S 11 |
8 | 2 | 7 | 82 | 6 | 77 | 5 | — | — | 12 | 11 | 10 | 18 | 51 | 9 | 81 | 184 | 120 | 120 | 39 | 37 | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | SSE 8 | SSE 7 | — | — | — | SSE 7 | SSE 8 | SSE 7 | SSE 7 | SSE 8 | — | — | — | — | — |
— | — | — | — | — | — | 99 | 117 | — | — | — | 139 | 165 | 157 | 99 | 99 | — | — | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 6 | 6 | 6 | 0 | 0 | 6 | 6 | 6 | 6 | 4 | 6 | 6 | 0 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 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.











