
Surf Forecasts:
Wanjapu surf forecast from 8 Aug 2026:
- Best quality surf: Tuesday 11 Aug, 5AM (local time) - 8ft (2.5m), 17s period, SSW swell with cross-offshore winds.
- Most powerful swell: Tuesday 11 Aug, 2AM (local time) - 10ft (3.0m), 17s period, SSW swell with 4,660 kJ wave energy.
- Next surfable swell (1★+): Sunday 9 Aug, 2PM (local time) - 7ft (2.2m), 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 Sunday (Aug 09) at 2PM. The primary swell is predicted to be 2.2m and 16s period with a secondary swell of 0.9m and 4s. 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 3.0m 17s and forecast to arrive on Tuesday (Aug 11) at 2AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.0m 5s period and expected on Sunday (Aug 09) at 5AM.
| Wave Type | Time (WITA) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2PM (Sun 9th Aug) | 7ft (2.2m) 16s |
| Best Surf | 5AM (Tue 11th Aug) | 8ft (2.5m) 17s |
| Most Powerful | 2AM (Tue 11th Aug) | 10ft (3.0m) 17s |
Table - best surf conditions forecast for Wanjapu over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s have a look at what’s on the menu for the next couple of weeks.
We’ve got one spot on the radar, and it's a proper reef break. The forecast is for a solid, persistent run of SW groundswell, but there’s a catch: the wind is mostly from the SE or SSE, which puts it in a cross or cross-onshore position for most of the period. That means the wave faces are going to have a bit of texture or chop on them, not the kind of glassy perfection you dream about. The swell energy is strong, hitting four-digit figures throughout, but the conditions are going to keep the quality in that "marginal" bracket.
The first real window of opportunity doesn't show up until the weekend of the 15th and 16th. On Saturday the 15th, the morning session at Wanjapu is where it’s at. The wind goes glassy—absolutely dead calm—and you’ve got a clean 6 ft SSW swell rolling in with a long 17-second period. The combined energy reads 1836, which is solid. This is groundswell at its finest, and on a reef, that long period is going to produce some proper, well-shaped lines. The sets will be a bit spread out, but the paddle out will be easier. This is the standout session for the whole forecast. Keep in mind, this is a reef break for advanced surfers, and it can get a crowd sometimes.
Sunday morning the 16th is a very similar story: glassy conditions again, 6 ft SSW swell at 16 seconds, and energy at 1673. Another cracker of a morning for those who can handle the reef.
The rest of the outlook is a bit of a mixed bag. The swell hangs around at decent sizes—between 6 ft and 8 ft—but the wind is almost always cross or cross-onshore, creating that slight chop. The period stays long, mostly between 14 and 18 seconds, so the energy is real. But without clean wind, the surface will be bumpy. The mornings on the 17th and 23rd of August show some offshore wind, but the wave state is listed as "unknown," so it's a gamble.
For the middle of the second week, from the 19th to the 21st of August, the swell pushes up to 8 ft and the energy is massive (over 3500), but with moderate cross-shore winds, that’s big, powerful, and messy. That’s a setup that looks more interesting for kite surfing than paddle surfing for most.
So, to wrap it up: if you're keen, your best bet is to aim for the early mornings of Saturday the 15th and Sunday the 16th. That’s where the magic is hiding. The rest of the time, it’s a waiting game.
Stay salty,
Rusty.
Short Range ForecastMostly dry. Warm (max 25°C on Sat night, min 23°C on Sat night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 26°C on Fri afternoon, min 23°C on Tue night). Wind will be generally light. | ||||||||||||||||||
Sunday 9 | Monday 10 | Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | ||||||||||||||
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 16 | SSW 16 | SW 16 | SSW 15 | SW 14 | SSW 18 | SSW 17 | SSW 17 | SSW 16 | SSW 16 | SSW 17 | SSW 17 | SSW 16 | SSW 17 | SSW 16 | SSW 16 | SSW 16 | SSW 15 | SSW 15 |
Wave Graph | |||||||||||||||||||
2472 | 2518 | 2233 | 1980 | 1340 | 3491 | 4660 | 3937 | 3191 | 2359 | 2551 | 1994 | 643 | 1907 | 1928 | 1671 | 1527 | 1102 | 974 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross | cross-off | cross-on | cross-on | cross | cross | cross | cross | cross | cross | cross | cross | cross-on | cross-off | cross-on | cross-on | cross |
High Tide | 5:27AM2.35m | 8:08PM1.58m | 7:16AM2.41m | 9:21PM1.83m | 8:37AM2.59m | 10:03PM2.10m | 9:36AM2.79m | 10:39PM2.37m | 10:24AM2.94m | 11:11PM2.60m | 11:06AM2.99m | 11:43PM2.79m | |||||||
Low Tide | 9:58PM1.24m | 1:29PM0.82m | 00:15AM1.38m | 2:52PM0.59m | 2:20AM1.24m | 3:43PM0.35m | 3:28AM0.99m | 4:23PM0.17m | 4:18AM0.72m | 4:59PM0.06m | 5:02AM0.51m | 5:31PM0.03m | |||||||
— | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:15 | — | — | 6:15 | — | — | |
6:00 | — | 6:00 | — | — | 6:00 | — | — | 6:01 | — | — | 6:01 | — | — | 6:01 | — | — | 6:01 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 25 | 25 | 25 | 24 | 24 | 25 | 24 | 25 | 25 | 24 | 25 | 25 | 24 | 25 | 25 | 24 | 25 | 26 | 25 |
Feels °C | 25 | 25 | 26 | 24 | 25 | 26 | 24 | 26 | 24 | 24 | 25 | 26 | 24 | 26 | 26 | 25 | 27 | 28 | 27 |
Swell 1 Height (m) Direction Period (s) | SSW 16 | SSW 16 | SW 16 | SSW 15 | SW 14 | SSW 18 | SSW 17 | SSW 17 | SSW 16 | SSW 16 | SSW 17 | SSW 17 | SSW 13 | SSW 17 | SSW 16 | SSW 16 | SSW 16 | SSW 15 | SSW 15 |
2472 | 2518 | 2233 | 1980 | 1340 | 3491 | 4660 | 3937 | 3191 | 2359 | 2551 | 1994 | 581 | 1907 | 1928 | 1671 | 1527 | 1102 | 974 | |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | SSW 19 | — | SW 21 | — | SW 19 | — | — | — | SSW 16 | — | — | SSW 24 | SW 21 | SW 21 | SSW 19 |
— | — | — | — | 1044 | — | 368 | — | 1100 | — | — | — | 643 | — | — | 54 | 117 | 222 | 475 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | SW 21 | SSE 6 | SSE 7 |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 117 | 13 | 18 | |
Wind waves Height (m) Direction Period (s) | SE 4 | SE 4 | SE 5 | SE 5 | — | — | — | — | SSE 6 | SSE 6 | SSE 6 | SSE 4 | S 4 | SE 4 | — | S 8 | — | SSE 6 | — |
24 | 34 | 22 | 35 | — | — | — | — | 22 | 23 | 20 | 12 | 10 | 16 | — | 33 | — | 14 | — | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 108 | 118 | 265 | 33 | 116 | 118 | 108 | 119 | 119 | 108 | 116 | 118 | 108 | 118 | 118 | 0 | 118 | 119 | 33 |
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.











