Surf Forecasts:
Wanjapu surf forecast from 28 Aug 2026:
- Best quality surf: Friday 28 Aug, 8PM (local time) - 8ft (2.5m), 16s period, SW swell with cross-offshore winds.
- Most powerful swell: Friday 28 Aug, 5PM (local time) - 8ft (2.5m), 16s period, SW swell with 3,808 kJ wave energy.
- Next surfable swell (1★+): Friday 28 Aug, 8PM (local time) - 8ft (2.5m), 16s period with SW swell.
Best Forecast Surf Conditions for Wanjapu this week:
The surf forecast for Wanjapu over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Friday (Aug 28) at 8PM. The primary swell is predicted to be 2.5m and 16s period. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Wanjapu in the next 16 days are 2.5m 16s and forecast to arrive on Friday (Aug 28) at 5PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.0m 6s period and expected on Tuesday (Sep 01) at 8PM.
| Wave Type | Time (WITA) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8PM (Fri 28th Aug) | 8ft (2.5m) 16s |
| Best Surf | 8PM (Fri 28th Aug) | 8ft (2.5m) 16s |
| Most Powerful | 5PM (Fri 28th Aug) | 8ft (2.5m) 16s |
Table - best surf conditions forecast for Wanjapu over the next 16 days.
The Lowdown
G’day, Rusty here. We’ve got a solid run of swell on the way at Wanjapu, but you’ve gotta read the conditions carefully – it’s not all clean open windows. This is an advanced-only reef setup that’s exposed to the SW, and it’s consistent, so it won’t stay flat for long.
The water’s sitting at 79°, which is pretty much what you’d expect for this time of year – no crazy anomaly, just normal tropical warmth.
The standout by a long shot is Friday morning, August 28. We’re looking at 8ft SW groundswell with a very long 17-second period, and the wind is glassy – literally dead calm from the SSW at only 3 mph. That’s about as clean as it gets. The combined wave energy is strong at 4374, so there’s serious power in the water. This is strictly for experienced surfers (over 8ft), and with that long period, the reef will handle it beautifully. Crowds are possible here, so get in early.
Saturday morning, August 29, is also a good shout. Still clean with glassy SSW winds at 3 mph, and a 7ft SW groundswell at a 16-second period. Energy is moderate to strong at 2179. Not quite the size of Friday, but still excellent for advanced surfers.
After that, conditions get a bit messy. From Saturday afternoon through to Thursday, September 10, the winds turn cross or cross-on, and the surf quality drops off – mostly marginal, with a few mornings that could be okay but not special. The swell sticks around, but the wind is your enemy here.
Then things look promising again on Friday morning, September 11 – that’s over two weeks away, so treat it as a long-range possibility. Glassy WSW winds at 3 mph, 7ft SW swell at 16 seconds, and strong energy at 2568. It’s still for experts, but if it holds, it could be another beauty.
There are no other breaks in this forecast, so Wanjapu is your only option. Keep an eye on that Friday morning window – that’s the one to plan for.
Rusty.
Short Range ForecastMostly dry. Warm (max 26°C on Fri afternoon, min 23°C on Fri night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 26°C on Mon afternoon, min 23°C on Tue night). Wind will be generally light. | ||||||||||||||||||||
Friday 28 | Saturday 29 | Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | |||||||||||||||
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) | SW 17 | SW 16 | SW 16 | SW 16 | SW 15 | SW 14 | SW 13 | SW 13 | SW 19 | SW 19 | SW 18 | SW 18 | SW 18 | SW 16 | SW 17 | SW 17 | SW 16 | SW 16 | SW 16 | SW 16 | SW 15 |
Wave Graph  | |||||||||||||||||||||
 kJ | 4343 | 3808 | 2905 | 2158 | 1576 | 1094 | 711 | 690 | 738 | 1044 | 1367 | 2318 | 3028 | 1504 | 2561 | 2748 | 2384 | 1809 | 1783 | 1265 | 924 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | cross-on | cross-off | glassy | cross | cross-off | cross-on | cross | cross-off | cross-on | cross | cross-off | cross-on | cross | cross-off | cross-on | cross | cross-off | cross-on | cross | cross-off |
High Tide | 10:29AM2.73m | 11:05PM2.60m | 10:59AM2.81m | 11:26PM2.76m | 11:29AM2.82m | 11:49PM2.88m | 11:58AM2.77m | 00:13AM2.96m | 12:28PM2.65m | 00:39AM2.97m | 12:59PM2.46m | 1:08AM2.92m | 1:33PM2.22m | 1:40AM2.79m | |||||||
Low Tide | 4:53PM0.25m | 4:58AM0.55m | 5:16PM0.20m | 5:28AM0.39m | 5:40PM0.20m | 5:58AM0.28m | 6:04PM0.24m | 6:30AM0.24m | 6:29PM0.34m | 7:03AM0.26m | 6:54PM0.47m | 7:40AM0.37m | 7:21PM0.65m | ||||||||
 | |  | | | | | | | | | | | | | | | | | | | |
 | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — |
 | — | 6:01 | — | — | 6:00 | — | — | 6:00 | — | — | 6:00 | — | — | 6:00 | — | — | 6:00 | — | — | 6:00 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 25 | 26 | 25 | 25 | 26 | 25 | 25 | 26 | 25 | 25 | 26 | 25 | 26 | 26 | 25 | 25 | 26 | 25 | 25 | 26 | 25 |
Feels °C | 27 | 27 | 27 | 27 | 28 | 27 | 27 | 26 | 27 | 27 | 29 | 28 | 27 | 27 | 27 | 27 | 28 | 26 | 26 | 27 | 26 |
Swell 1 Height (m) Direction Period (s) | SW 17 | SW 16 | SW 16 | SW 16 | SW 15 | SW 14 | SW 13 | SW 13 | SW 13 | SW 19 | SW 18 | SW 18 | SW 18 | SW 16 | SW 17 | SW 17 | SW 16 | SW 16 | SW 16 | SW 16 | SW 15 |
| kJ | 4343 | 3808 | 2905 | 2158 | 1576 | 1094 | 711 | 690 | 535 | 1044 | 1367 | 2318 | 3028 | 1504 | 2561 | 2748 | 2384 | 1809 | 1783 | 1265 | 924 |
Swell 2 Height (m) Direction Period (s) | SE 6 | — | SE 6 | SE 5 | S 22 | SSE 6 | SW 22 | SSW 21 | SW 19 | SW 12 | SW 12 | SW 11 | — | SW 19 | — | — | — | — | W 18 | — | — |
| kJ | 31 | — | 27 | 21 | 9 | 20 | 121 | 302 | 738 | 336 | 278 | 128 | — | 1161 | — | — | — | — | 6 | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | S 26 | SSW 24 | SE 5 | SSW 5 | SE 6 | SE 5 | — | SE 6 | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | 13 | 54 | 6 | 3 | 15 | 6 | — | 32 | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | SE 6 | — | — | SE 5 | — | — | SSE 5 | — | SE 5 | SE 4 | SE 6 | SE 5 | SE 6 | SE 6 | SE 5 | SE 5 | SE 6 | SE 5 | SE 5 | SE 5 |
| kJ | — | 52 | — | — | 24 | — | — | 8 | — | 25 | 23 | 72 | 31 | 58 | 44 | 25 | 58 | 36 | 21 | 47 | 24 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 108 | 0 | 0 | 108 | 0 | 116 | 108 | 0 | 116 | 262 | 0 | 119 | 119 | 0 | 118 | 262 | 0 | 119 | 120 | 0 |
Best forecast wave conditions in Sumba | |||||||||||||||||||||
Best forecast wave conditions in Indonesia | |||||||||||||||||||||
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Information about the Wanjapu Surf forecast
The above surf forecast table for Wanjapu provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Wanjapu can be found by selecting the local surf guide option on the grey menu. Our Wanjapu 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 (Wanjapu) 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 Wanjapu 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.
Wanjapu is 24 km (15 miles) from the city of Adalara. If you plan a holiday in Sumba, look for hotels and other accommodation in Adalara. Adalara has rooms for a wide range of budgets as well as car hire and transport links.
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