Surf Forecasts:
Wanjapu surf forecast from 24 Aug 2026:
- Best quality surf: Friday 28 Aug, 2AM (local time) - 6ft (1.8m), 18s period, SW swell with glassy winds.
- Most powerful swell: Friday 28 Aug, 11AM (local time) - 8ft (2.5m), 17s period, SW swell with 4,343 kJ wave energy.
- Next surfable swell (1★+): Tuesday 25 Aug, 8AM (local time) - 4.5ft (1.4m), 14s 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 Tuesday (Aug 25) at 8AM. The primary swell is predicted to be 1.4m and 14s period with a secondary swell of 0.7m and 18s. Another secondary swell of 0.6m and 5s is also forecast. 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 17s and forecast to arrive on Friday (Aug 28) at 11AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.6m 6s period and expected on Friday (Aug 28) at 11PM.
| Wave Type | Time (WITA) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8AM (Tue 25th Aug) | 4.5ft (1.4m) 14s |
| Best Surf | 2AM (Fri 28th Aug) | 6ft (1.8m) 18s |
| Most Powerful | 11AM (Fri 28th Aug) | 8ft (2.5m) 17s |
Table - best surf conditions forecast for Wanjapu over the next 16 days.
The Lowdown
Alright, let’s run that down in feet and miles per hour for those who think in imperial.
This is Rusty. The water’s sitting warm at 78°, right around normal for the season.
First few days at Wanjapu (a reef break) are a bit of a battle. Monday and Tuesday the 24th–25th, you’ve got 6–7 foot SW swell but the wind’s cross or cross-onshore, so it’s lumpy and chunky. The wave energy is moderate, not huge.
Wednesday the 26th, morning glass-off. That’s your first true standout. Waves are around 6 feet from the SW with a 14-second period – long lines, clean face, proper groundswell. The energy is strong. This reef break is consistent and can get crowded, so get in early.
Friday the 28th the swell pumps up to 8 feet from the SW with a 17-second period. That’s very long period groundswell, and the energy hits 4343. That is a serious, expert-only day. Beginners stay well clear.
The morning of Sunday the 30th, we get a light offshore breeze again, but the swell drops to 5 feet and energy is lower. Still a fun wave.
Then Monday the 31st, look at that swell: only 4 feet but with a laughably long 21-second period. That’s the kind of pulse that only a reef or point can turn into perfection. Offshore wind in the morning.
The real powerhouse is Tuesday the 1st of September: glassy morning, 2.2m (7 feet) of SW groundswell with a 17-second period, and energy at 2833. Easy standout of the whole outlook.
After that, a slow decline through early September with mostly cross winds and moderate energy. Nothing laps the two glassy mornings we nailed down. The first week’s morning sessions are the gold.
That’s it from me.
Rusty.
Short Range ForecastMostly dry. Warm (max 26°C on Mon afternoon, min 23°C on Mon night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 26°C on Thu afternoon, min 23°C on Thu night). Wind will be generally light. | ||||||||||||||||||||
Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | Sunday 30 | |||||||||||||||
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 | SW 16 | SW 15 | SW 14 | SW 16 | SSW 15 | SW 14 | SSW 14 | SW 13 | SSW 12 | SW 21 | SW 18 | SW 17 | SW 16 | SW 16 | SW 15 | SW 15 | SW 14 | SW 13 | SW 13 | SW 19 |
Wave Graph  | |||||||||||||||||||||
 kJ | 1972 | 1531 | 1237 | 1016 | 1449 | 1409 | 1187 | 1065 | 854 | 521 | 589 | 2127 | 4343 | 3855 | 2721 | 2130 | 1576 | 1094 | 792 | 711 | 546 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross-off | cross | cross | cross-off | glassy | cross-on | glassy | cross-on | cross-on | glassy | cross-on | cross | glassy | cross-on | cross | cross-off | on | cross | glassy |
High Tide | 9:48PM1.77m | 8:39AM2.20m | 10:04PM1.98m | 9:23AM2.40m | 10:23PM2.20m | 9:58AM2.59m | 10:44PM2.40m | 10:29AM2.73m | 11:05PM2.60m | 10:59AM2.81m | 11:26PM2.76m | 11:29AM2.82m | 11:49PM2.88m | ||||||||
Low Tide | 3:12PM0.86m | 2:42AM1.40m | 3:41PM0.66m | 3:26AM1.18m | 4:06PM0.49m | 3:59AM0.96m | 4:30PM0.34m | 4:29AM0.75m | 4:53PM0.25m | 4:58AM0.55m | 5:16PM0.20m | 5:28AM0.39m | 5:40PM0.20m | ||||||||
 | |  | | | | | | | | | | |  | | | | | | | | |
 | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — |
 | — | 6:01 | — | — | 6:01 | — | — | 6:01 | — | — | 6:01 | — | — | 6:01 | — | — | 6:00 | — | — | 6:00 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 25 | 26 | 24 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 26 | 24 | 25 | 26 | 25 | 25 | 26 | 25 | 25 | 26 | 24 |
Feels °C | 26 | 27 | 25 | 26 | 27 | 26 | 27 | 27 | 26 | 26 | 27 | 25 | 27 | 28 | 26 | 27 | 28 | 27 | 27 | 28 | 25 |
Swell 1 Height (m) Direction Period (s) | SSW 15 | SW 16 | SW 15 | SW 14 | SW 16 | SSW 15 | SW 14 | SSW 14 | SW 13 | SSW 12 | SW 12 | SW 18 | SW 17 | SW 16 | SW 16 | SW 15 | SW 15 | SW 14 | SW 13 | SW 13 | SW 13 |
| kJ | 1972 | 1531 | 1237 | 1016 | 1449 | 1409 | 1187 | 1065 | 854 | 521 | 379 | 2127 | 4343 | 3855 | 2721 | 2130 | 1576 | 1094 | 792 | 711 | 424 |
Swell 2 Height (m) Direction Period (s) | SW 21 | SW 19 | — | — | — | — | SE 4 | — | SSW 16 | SW 16 | SW 15 | SSW 14 | — | — | SE 6 | — | S 26 | SSW 23 | SW 23 | SW 21 | SW 19 |
| kJ | 17 | 131 | — | — | — | — | 6 | — | 107 | 421 | 589 | 982 | — | — | 32 | — | 13 | 54 | 130 | 222 | 546 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | SW 24 | SW 22 | SW 21 | SE 5 | — | — | — | — | — | — | — | S 7 | SSE 8 |
| kJ | — | — | — | — | — | — | — | — | 22 | 166 | 517 | 30 | — | — | — | — | — | — | — | 1 | 67 |
Wind waves Height (m) Direction Period (s) | SE 5 | SE 5 | SE 5 | SSE 4 | SE 4 | SE 5 | — | — | SE 4 | — | ESE 6 | SE 5 | — | SE 4 | SE 6 | SE 5 | SE 5 | SSE 5 | — | SSE 5 | SE 5 |
| kJ | 26 | 37 | 49 | 12 | 19 | 66 | — | — | 21 | — | 23 | 51 | — | 32 | 88 | 24 | 26 | 28 | — | 23 | 55 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 119 | 118 | 33 | 119 | 118 | 0 | 0 | 108 | 0 | 116 | 118 | 0 | 118 | 118 | 0 | 118 | 118 | 33 | 116 | 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.
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