
Surf Forecasts:
Wanjapu surf forecast from 28 Jul 2026:
- Best quality surf: Thursday 30 Jul, 11PM (local time) - 3.5ft (1.0m), 19s period, SW swell with cross-offshore winds.
- Most powerful swell: Sunday 2 Aug, 11PM (local time) - 6ft (1.9m), 16s period, SSW swell with 1,787 kJ wave energy.
- Next surfable swell (1★+): Wednesday 29 Jul, 11PM (local time) - 4ft (1.2m), 14s period with SSW 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 Wednesday (Jul 29) at 11PM. The primary swell is predicted to be 1.2m and 14s period with a secondary swell of 0.4m and 21s. Another secondary swell of 1.2m and 6s 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 1.9m 16s and forecast to arrive on Sunday (Aug 02) at 11PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.4m 6s period and expected on Sunday (Aug 02) at 8PM.
| Wave Type | Time (WITA) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11PM (Wed 29th Jul) | 4ft (1.2m) 14s |
| Best Surf | 11PM (Thu 30th Jul) | 3.5ft (1.0m) 19s |
| Most Powerful | 11PM (Sun 2nd Aug) | 6ft (1.9m) 16s |
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 coming weeks. We’ve got one spot that’s really going to do the talking for this whole stretch: Wanjapu. It’s a consistent, advanced reef break that’s exposed to the SW swell, and it’s where all the action is.
The water’s sitting at a pretty normal 79°F for this time of year, so nothing weird going on there.
Right now, the first few days are a bit of a write-off. Tuesday afternoon the 28th is a no-go – we’ve got a weak 3ft, 16-second groundswell from the SSW, but the 25 km/h cross-shore wind is just wrecking it. The combined energy is only 573, so it’s weak and messy. Wednesday and Thursday are similar stories: small surf, cross-shore winds, and a lot of chop. The swell is building a little, but the conditions are just “marginal” at best. You’re not missing anything.
Now, things start to get interesting on Saturday morning, August 1st. The wind goes glassy, which is a huge plus. We’ve got a clean 4ft, 16-second SSW groundswell pumping in, with strong energy (1301). That’s a solid, clean wave for an experienced surfer. The downside? It’s a reef break, and it’s *sometimes* crowded, so expect some company. This is the first real standout.
The surf keeps ticking over through the weekend and into early next week, but the winds are a bit cross-shore again. The swell holds around 5ft to 6ft, with decent energy. Not bad, but not perfect.
Then, Tuesday morning, August 4th – another glassy morning! This time with 5ft, 14-second swell from the SW. The energy is a little lower (1035) but the glassy wind makes it a quality session. Another good call for the early risers.
The real highlight, the one you’ve been waiting for, is Friday morning, August 7th. We’ve got glassy conditions again, and the swell has jumped to a solid 8ft, 16-second groundswell from the SSW. The energy is massive (2765). This is a powerful, clean wave. But listen, at 8ft, this is getting into the "experts only" territory. It’s going to be a big, powerful reef break. If you’re not confident, give it a miss. The crowd will probably be there, but for the right reasons.
The swell pushes even bigger on Saturday the 8th, hitting 8ft, and the wind is cross-on, which will make it a bit of a beast. That’s for the brave, or the kitesurfers, honestly. The setup is more challenging for a paddle surfer.
After that, the swell slowly fades through the second week. We’ve got a lot of 6ft to 7ft swell, but the winds are often cross-shore or cross-on, and the chop builds. The period is still long (15-17 seconds), so it’s a proper groundswell, but the conditions are just not as clean. The last few days, from the 9th to the 12th of August, are mostly marginal with moderate to fresh winds. It’s not a total washout, but it’s not the prime time.
The bottom line: The standout windows are the glassy mornings of Saturday, August 1st, Tuesday, August 4th, and especially Friday, August 7th. The 7th is the biggest, cleanest, and most powerful day of the whole outlook. The second week is more of a gamble with the wind.
Rusty out.
Short Range ForecastMostly dry. Warm (max 25°C on Tue afternoon, min 22°C on Wed night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 26°C on Sun morning, min 23°C on Fri night). Wind will be generally light. | |||||||||||||||||||
Tue 28 | Wednesday 29 | Thursday 30 | Friday 31 | Saturday 1 | Sunday 2 | Monday 3 | ||||||||||||||
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 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 | SW 16 | SW 16 | SW 15 | SW 15 | SW 15 |
Wave Graph | ||||||||||||||||||||
314 | 503 | 489 | 515 | 501 | 545 | 643 | 565 | 1009 | 679 | 1057 | 832 | 1302 | 1663 | 1652 | 1714 | 1611 | 1074 | 1045 | 1045 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-off | cross | cross | cross-off | cross | cross | cross-off | cross-on | cross | off | glassy | cross | cross-off | cross | cross | cross-off | cross | cross | cross-off |
High Tide | 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 | 12:49PM2.63m | 1:17AM2.72m | |||||||
Low Tide | 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 | 6:53AM0.56m | 7:03PM0.33m | |||||||
— | — | 6:20 | — | — | 6:20 | — | — | 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 | 25 | 25 | 25 | 24 | 25 | 25 | 25 | 25 | 25 | 24 | 25 | 25 | 25 | 26 | 26 | 25 | 26 | 26 | 25 |
Feels °C | 24 | 23 | 25 | 25 | 22 | 25 | 25 | 25 | 26 | 26 | 25 | 27 | 27 | 27 | 28 | 29 | 26 | 28 | 29 | 28 |
Swell 1 Height (m) Direction Period (s) | 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 | SW 16 | SW 16 | SW 15 | SW 15 | SW 15 |
314 | 503 | 489 | 515 | 501 | 545 | 553 | 463 | 1009 | 679 | 1057 | 832 | 1302 | 1663 | 1652 | 1714 | 1611 | 1074 | 1045 | 1045 | |
Swell 2 Height (m) Direction Period (s) | SW 12 | — | SW 24 | SW 23 | SSE 6 | SSE 6 | SSW 19 | SSW 18 | SSW 13 | SSW 14 | SSE 6 | SW 19 | SSE 6 | SE 7 | SE 7 | — | SE 6 | SSE 6 | SE 6 | SE 6 |
92 | — | 22 | 21 | 65 | 33 | 643 | 565 | 215 | 390 | 26 | 450 | 15 | 36 | 37 | — | 37 | 27 | 18 | 26 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | SW 21 | SSW 20 | — | SSE 6 | SSE 6 | SSE 6 | SSW 22 | SE 6 | — | — | — | — | — | — | — | — |
— | — | — | — | 116 | 256 | — | 51 | 28 | 27 | 45 | 19 | — | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | SE 6 | SE 6 | SSE 6 | SE 6 | SE 6 | SE 6 | SSE 6 | — | — | SE 7 | — | — | — | — | — | SE 6 | — | — | SE 6 | — |
167 | 88 | 60 | 132 | 135 | 96 | 44 | — | — | 85 | — | — | — | — | — | 34 | — | — | 53 | — | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 116 | 33 | 119 | 262 | 0 | 119 | 262 | 0 | 119 | 108 | 0 | 0 | 108 | 0 | 2 | 119 | 0 | 2 | 116 | 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.










