
Surf Forecasts:
Wanjapu surf forecast from 31 Jul 2026:
- Best quality surf: Thursday 6 Aug, 8AM (local time) - 7ft (2.2m), 18s period, SSW swell with cross-offshore winds.
- Most powerful swell: Friday 7 Aug, 2PM (local time) - 8ft (2.5m), 16s period, SSW swell with 3,592 kJ wave energy.
- Next surfable swell (1★+): Friday 31 Jul, 11PM (local time) - 4.5ft (1.4m), 17s 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 (Jul 31) at 11PM. The primary swell is predicted to be 1.4m and 17s period with a secondary swell of 0.6m and 6s. 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 07) at 2PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.4m 6s period and expected on Monday (Aug 03) at 8PM.
| Wave Type | Time (WITA) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11PM (Fri 31st Jul) | 4.5ft (1.4m) 17s |
| Best Surf | 8AM (Thu 6th Aug) | 7ft (2.2m) 18s |
| Most Powerful | 2PM (Fri 7th Aug) | 8ft (2.5m) 16s |
Table - best surf conditions forecast for Wanjapu over the next 16 days.
The Lowdown
Alright, Rusty here, let’s have a look at what’s cooking.
First up, we’ve got Wanjapu, a reliable reef break that’s exposed to the SW. The water temp is sitting at 79°, which is bang on average for this time of year, so nothing unusual there. The coming days look promising, but you’ll need to pick your windows.
The best early action kicks off Saturday morning, August 1st. It’s glassy, clean, with a 4ft SSW groundswell at a very long 16 seconds. That long period is going to produce some beautiful, powerful lines – perfect for a reef. The combined energy is strong at 1303, so there’s plenty of punch. This is a standout session for the advanced crew.
Sunday morning, August 2nd, is also a cracker. Another glassy start, with the swell building to 6ft from the SW, still at that juicy 16 seconds. The energy jumps to 1674, meaning even more push. The conditions will be pristine. This is your other true highlight.
As we move into the week, the swell stays in the 5ft to 6ft range, but winds become a bit more crossy or cross-onshore, so the cleanest windows will be the early mornings. The morning of Monday, August 3rd, has a clean cross-offshore breeze and a 6ft SSW swell – that’s very surfable. Tuesday morning, August 4th, is glassy again with a 5ft SW swell, but the period drops to 14 seconds, so it’s a bit less grunty.
From Wednesday the 5th onwards, the swell starts to build, but the winds get messier. It’s a lot of moderate cross-shore chop, especially in the afternoons. The swell hits 7ft by Thursday the 6th, but the quality is compromised.
Now, look out for Tuesday, August 11th. The morning has a 10ft SSW groundswell at a massive 18 seconds. The energy is enormous at 6979, and the wind is light offshore from the SW. This is serious, powerful swell – expert territory only. It’s a long-range call, so a bit less certain, but the potential is massive.
After that, the swell stays solid through the second week, with another 10ft pulse on Saturday, August 15th, but the winds are generally cross or cross-onshore, so it’s not as clean as those early glassy mornings. The 10ft swells are definitely for the experienced crew only.
Overall, the standout is Saturday morning, August 1st, and Sunday morning, August 2nd. If you can get out then, you’re in for a treat. The rest of the period has swell, but you’ll need to be picky about the wind.
Rusty.
Short Range ForecastMostly dry. Warm (max 26°C on Sun morning, min 23°C on Fri night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 26°C on Mon afternoon, min 23°C on Mon night). Wind will be generally light. | |||||||||||||||||||
Fri 31 | Saturday 1 | Sunday 2 | Monday 3 | Tuesday 4 | Wednesday 5 | Thursday 6 | ||||||||||||||
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 | SSW 16 | SW 16 | SSW 18 | SW 16 | SSW 16 | SSW 16 | SSW 15 | SSW 15 | SW 15 | SW 14 | SW 14 | SW 13 | SW 14 | SW 15 | SW 19 | SSW 17 | SW 17 | SW 16 |
Wave Graph | ||||||||||||||||||||
679 | 1057 | 832 | 1302 | 1837 | 1652 | 1855 | 1765 | 1206 | 1158 | 1059 | 1031 | 1002 | 651 | 1064 | 1059 | 2669 | 2998 | 2761 | 2320 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | off | glassy | cross | cross-off | glassy | cross | cross-off | cross-off | cross | cross-off | glassy | cross-on | cross-off | cross-on | cross | cross-off | cross | cross | cross-off |
High Tide | 00:02AM2.51m | 11:48AM2.79m | 00:27AM2.61m | 12:18PM2.74m | 00:51AM2.69m | 12:49PM2.63m | 1:17AM2.72m | 1:21PM2.47m | 1:46AM2.72m | 1:56PM2.25m | 2:18AM2.67m | 2:38PM2.00m | 2:59AM2.58m | |||||||
Low Tide | 5:48PM0.18m | 5:48AM0.67m | 6:13PM0.18m | 6:20AM0.60m | 6:38PM0.23m | 6:53AM0.56m | 7:03PM0.33m | 7:28AM0.56m | 7:29PM0.46m | 8:07AM0.60m | 7:56PM0.62m | 8:52AM0.69m | 8:26PM0.81m | |||||||
— | — | 6:18 | — | — | 6:18 | — | — | 6:18 | — | — | 6:18 | — | — | 6:18 | — | — | 6:18 | — | — | |
6:00 | — | — | 6:00 | — | — | 6:00 | — | — | 6:00 | — | — | 6:00 | — | — | 6:00 | — | — | 6:00 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 25 | 24 | 25 | 25 | 24 | 26 | 26 | 25 | 26 | 26 | 25 | 25 | 26 | 25 | 25 | 26 | 25 | 25 | 25 | 25 |
Feels °C | 25 | 24 | 27 | 26 | 25 | 29 | 29 | 28 | 28 | 28 | 28 | 28 | 28 | 27 | 27 | 27 | 27 | 26 | 26 | 26 |
Swell 1 Height (m) Direction Period (s) | SW 17 | SW 16 | SSW 16 | SW 16 | SSW 18 | SW 16 | SSW 16 | SSW 16 | SSW 15 | SSW 15 | SW 15 | SW 14 | SW 14 | SW 13 | SW 14 | SW 15 | SW 19 | SSW 17 | SW 17 | SW 16 |
679 | 1057 | 832 | 1302 | 1837 | 1652 | 1855 | 1765 | 1206 | 1158 | 1059 | 1031 | 1002 | 651 | 1064 | 1059 | 2669 | 2998 | 2761 | 2320 | |
Swell 2 Height (m) Direction Period (s) | SSW 14 | SSE 6 | SW 19 | SE 6 | SE 6 | SE 7 | SE 7 | SE 6 | SE 7 | — | SE 6 | SE 6 | SE 6 | SW 16 | SW 22 | SW 21 | — | — | — | W 13 |
384 | 22 | 450 | 19 | 51 | 22 | 37 | 43 | 28 | — | 37 | 18 | 19 | 610 | 120 | 450 | — | — | — | 3 | |
Swell 3 Height (m) Direction Period (s) | SW 22 | SSW 22 | SE 6 | — | — | — | — | — | — | — | — | — | — | SE 6 | — | — | — | — | — | — |
73 | 45 | 21 | — | — | — | — | — | — | — | — | — | — | 46 | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | SSE 6 | — | — | — | — | — | SE 7 | — | — | SE 7 | — | — | SE 6 | ESE 6 | SSE 5 | SE 5 | SE 6 | SE 5 | SE 4 | SE 6 |
24 | — | — | — | — | — | 135 | — | — | 36 | — | — | 62 | 108 | 18 | 44 | 44 | 31 | 29 | 36 | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 116 | 0 | 0 | 2 | 0 | 0 | 108 | 0 | 0 | 116 | 0 | 0 | 118 | 0 | 119 | 118 | 0 | 118 | 118 | 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.











