Surf Forecasts:
Wanjapu surf forecast from 26 Jul 2026:
- Best quality surf: Thursday 30 Jul, 5PM (local time) - 3ft (0.9m), 19s period, SSW swell with cross-offshore winds.
- Most powerful swell: Sunday 2 Aug, 5PM (local time) - 6.5ft (2.0m), 17s period, SSW swell with 2,406 kJ wave energy.
- Next surfable swell (1★+): Tuesday 28 Jul, 2AM (local time) - 5.5ft (1.7m), 7s period with SE 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 (Jul 28) at 2AM. The primary swell is predicted to be 1.7m and 7s period with a secondary swell of 1.1m and 7s. Another secondary swell of 0.6m and 13s 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 2.0m 17s and forecast to arrive on Sunday (Aug 02) at 5PM. Winds are predicted to be cross-shore at the time the swell arrives.
| Wave Type | Time (WITA) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2AM (Tue 28th Jul) | 5.5ft (1.7m) 7s |
| Best Surf | 5PM (Thu 30th Jul) | 3ft (0.9m) 19s |
| Most Powerful | 5PM (Sun 2nd Aug) | 6.5ft (2.0m) 17s |
Table - best surf conditions forecast for Wanjapu over the next 16 days.
The Lowdown
Alright, let’s keep it in feet and knots this time around. Rusty here with the Wanjapu outlook.
Wanjapu is a reef break for the experienced crew, exposed to SW swell, and consistent. Water temperature is 79°F, right around normal for this time of year - nothing weird going on with the temp.
We’ve got a slow start. Monday 27 July and Tuesday 28 July are full of poor surf conditions and cross-shore winds - not worth paddling out. Wednesday 29 July and Thursday 30 July mornings stay marginal with cross-shore breeze and questionable tides.
But Thursday 30 July afternoon starts to wake up. The wind goes cross-offshore and turns clean, with a 3ft SSW swell at 19 seconds - that’s a long period groundswell, and the energy’s moderate (1245). This is excellent for experienced surfers. Not big, but it’ll be silky.
The absolute standout is Saturday 1 August morning. Glassy conditions, 4ft SSW groundswell at 16 seconds, energy at 1313. Zero wind, clean faces, solid period. Crowds are “sometimes” so you might see a few others, but that morning glass will be worth it. That’s your best session of the first week.
Sunday 2 August keeps the groundswell rolling: 6–7ft SSW at 17 seconds, with energy peaking at 2448 on the afternoon. But the cross-shore wind messes with the shine a little. Monday 3 August morning goes glassy again - 6ft SW at 16 seconds, 1612 energy - another excellent session for experienced surfers. Just be ready for the long period at a reef; the sets will be spaced out.
From 6 August, it gets serious. Thursday 6 August morning has 7ft SSW at 18 seconds, with 2847 energy - that’s strong. But the cross-onshore wind will put some bump on the face. By Saturday 8 August morning we’re looking at 8ft SSW at 17 seconds and 4036 energy. That’s powerful, heavy swell. Only for experts. The cross-onshore wind is a bit of a buzzkill but the size and energy are impressive.
Sunday 9 August through Tuesday 11 August stay in the 7–8ft range with period around 15–17 seconds. Winds stay cross to cross-onshore, so it’s not perfect but there’s non-stop swell.
Best on offer: Thursday 30 July afternoon for the clean cross-offshore lines, even if it’s only 3ft, and Saturday 1 August morning for the glassy 4ft groundswell with solid period. Those two mornings are the ones to circle.
Second week is heavy and powerful but dirtier with the wind. Still plenty of swell for the experienced crew.
Rusty out.
Short Range ForecastMostly dry. Warm (max 26°C on Mon morning, min 22°C on Wed night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 26°C on Sat afternoon, min 23°C on Thu morning). Wind will be generally light. | ||||||||||||||||||||
Monday 27 | Tuesday 28 | Wednesday 29 | Thursday 30 | Friday 31 | Saturday 1 | Sunday 2 | |||||||||||||||
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 14 | SE 7 | SE 7 | SSW 16 | SSW 16 | SW 15 | SW 15 | SSW 14 | SSW 14 | SSW 14 | SSW 19 | SSW 18 | SSW 17 | SW 17 | SW 16 | SSW 16 | SW 16 | SSW 18 | SW 16 | SSW 17 | SSW 16 |
Wave Graph  | |||||||||||||||||||||
 kJ | 116 | 314 | 263 | 318 | 314 | 503 | 489 | 523 | 501 | 545 | 643 | 565 | 1009 | 679 | 1057 | 843 | 1286 | 1663 | 1652 | 2406 | 1787 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross-off | cross | cross | cross-off | cross | cross | cross-off | cross | cross-off | cross-off | cross | cross | cross-off | glassy | cross | cross-off | cross | cross | cross-off |
High Tide | 8:44AM2.30m | 10:17PM1.91m | 9:32AM2.46m | 10:45PM2.07m | 10:11AM2.61m | 11:11PM2.23m | 10:45AM2.72m | 11:37PM2.38m | 11:17AM2.79m | 00:02AM2.51m | 11:48AM2.79m | 00:27AM2.61m | 12:18PM2.74m | 00:51AM2.69m | |||||||
Low Tide | 3:54PM0.60m | 3:28AM1.20m | 4:26PM0.44m | 4:08AM1.04m | 4:55PM0.31m | 4:43AM0.89m | 5:22PM0.22m | 5:16AM0.77m | 5:48PM0.18m | 5:48AM0.67m | 6:13PM0.18m | 6:20AM0.60m | 6:38PM0.23m | ||||||||
 | |  | | | | | | | | | | |  | | | | | | | | |
 | 6:20 | — | — | 6:20 | — | — | 6:20 | — | — | 6:20 | — | — | 6:18 | — | — | 6:18 | — | — | 6:18 | — | — |
 | — | 6:00 | — | — | 6:00 | — | — | 6:00 | — | — | 6:00 | — | — | 6:00 | — | — | 6:00 | — | — | 6:00 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 26 | 25 | 25 | 25 | 25 | 24 | 25 | 25 | 24 | 25 | 25 | 24 | 25 | 25 | 24 | 25 | 26 | 25 | 26 | 26 | 25 |
Feels °C | 26 | 23 | 24 | 25 | 24 | 23 | 25 | 24 | 22 | 24 | 24 | 24 | 26 | 27 | 25 | 28 | 28 | 28 | 28 | 29 | 26 |
Swell 1 Height (m) Direction Period (s) | S 7 | SW 13 | SSE 7 | SSW 16 | SSW 16 | SW 15 | SW 15 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | SW 14 | SSW 17 | SW 17 | SW 16 | SSW 16 | SW 16 | SSW 18 | SW 16 | SSW 17 | SSW 16 |
| kJ | 53 | 142 | 113 | 318 | 314 | 503 | 489 | 523 | 501 | 545 | 553 | 463 | 1009 | 679 | 1057 | 843 | 1286 | 1663 | 1652 | 2406 | 1787 |
Swell 2 Height (m) Direction Period (s) | SW 14 | SSW 18 | SW 13 | SW 12 | SW 12 | — | SW 24 | SW 23 | SSE 6 | SSW 20 | SSW 19 | SSW 18 | SSW 13 | SSW 14 | SE 6 | SW 19 | SE 7 | SE 6 | SE 7 | — | SE 6 |
| kJ | 116 | 120 | 138 | 92 | 92 | — | 22 | 21 | 62 | 256 | 643 | 565 | 215 | 390 | 20 | 450 | 22 | 33 | 44 | — | 39 |
Swell 3 Height (m) Direction Period (s) | SSW 12 | — | SSW 16 | — | — | — | — | — | SW 21 | S 6 | — | SSE 6 | SSE 6 | SSE 6 | SW 22 | SE 6 | — | SW 21 | SSW 20 | — | — |
| kJ | 57 | — | 181 | — | — | — | — | — | 116 | 19 | — | 49 | 26 | 26 | 73 | 20 | — | 117 | 336 | — | — |
Wind waves Height (m) Direction Period (s) | SE 7 | SE 7 | SE 7 | SSE 6 | SE 6 | SE 6 | SSE 6 | SE 6 | — | — | SSE 6 | — | — | — | — | — | SE 7 | SE 6 | — | SE 6 | — |
| kJ | 105 | 314 | 263 | 82 | 159 | 88 | 67 | 124 | — | — | 49 | — | — | — | — | — | 75 | 91 | — | 42 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 119 | 119 | 0 | 116 | 118 | 33 | 119 | 262 | 0 | 119 | 0 | 0 | 119 | 108 | 0 | 0 | 108 | 0 | 2 | 262 | 0 |
Best forecast wave conditions in Sumba | |||||||||||||||||||||
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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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