Surf Forecasts:
Wanjapu surf forecast from 25 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, 2PM (local time) - 10ft (3.0m), 17s period, SW swell with 4,278 kJ wave energy.
- Next surfable swell (1★+): Tuesday 25 Aug, 11PM (local time) - 5.5ft (1.7m), 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 Tuesday (Aug 25) at 11PM. The primary swell is predicted to be 1.7m and 16s period with a secondary swell of 0.9m and 5s. 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 Friday (Aug 28) 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 1.2m 6s period and expected on Tuesday (Sep 01) at 2AM.
| Wave Type | Time (WITA) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11PM (Tue 25th Aug) | 5.5ft (1.7m) 16s |
| Best Surf | 2AM (Fri 28th Aug) | 6ft (1.8m) 18s |
| Most Powerful | 2PM (Fri 28th Aug) | 10ft (3.0m) 17s |
Table - best surf conditions forecast for Wanjapu over the next 16 days.
The Lowdown
Alright crew, Rusty here. Let's have a look at what Wanjapu has in store for us.
It's a bit of a tricky outlook, to be honest. The swell is coming through fairly consistently from the SW, but very rarely are the winds playing nice for clean conditions. The water temp is sitting at 78°, which is about normal for this time of year, so don't expect any surprises there.
We start off with no real quality on Tuesday the 25th. There's a 5ft SW swell but that SSE wind is creating a bumpy cross-shore mess, so it's a pass.
Wednesday the 26th morning actually looks like the best window of the early period. The swell holds at 6ft from the SW, but crucially we get a clean 3 mph offshore wind from the SSW. The combined energy is moderate (1194) and it's a reef break, so that long 14-second period should set up nicely. It's a solid call for advanced surfers, though you might have some company on the takeoff.
After that, things get a bit messy. The rest of that week and into the weekend is mostly cross-onshore winds making for choppy faces. The swell does bump up on Friday the 28th to a solid 8ft from the SW with a very long 17-second period – that's powerful (4090 combined energy) but at that height and with the cross-onshore wind, it's really one for experienced guys only. For most of us, it's a washout.
We get another good window on Monday the 31st morning. The swell drops to a clean 4ft but the period is super long at 19 seconds and the wind is offshore from the SSW. It will be a bit small but incredibly clean and lined-up on that reef. A good time for a more relaxed session.
Tuesday September 1st morning has a bigger 7ft SW swell (2263 combined energy) and the wind is only a light cross-onshore, so the surface quality won't be perfect but there will be plenty of power. The same goes for Wednesday September 2nd morning with a similar 7ft SW swell and a 17-second period, just with a touch of cross-onshore wind again. It's a frustrating pattern.
Honestly, for the standouts, Wednesday the 26th morning and Monday the 31st morning are your best bets for clean conditions. If you want raw power and are confident in your abilities, Friday the 28th morning has the biggest swell, but the wind will be an issue.
The rest of the outlook into the second week holds similar sized SW swells but it's a repeating story of either cross or cross-onshore winds keeping the surface bumpy. There are no perfect days on offer.
Stay patient, pick your window, and enjoy the clean ones while they last.
Rusty.
Short Range ForecastMostly dry. Warm (max 26°C on Tue morning, min 23°C on Tue night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 26°C on Fri afternoon, min 23°C on Sat night). Wind will be generally light. | ||||||||||||||||||||
Tuesday 25 | Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | Sunday 30 | Monday 31 | |||||||||||||||
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 | SW 16 | SW 15 | SW 14 | SSW 14 | SW 13 | SSW 12 | SW 21 | SW 18 | SW 17 | SW 16 | SW 16 | SW 16 | SW 15 | SW 14 | SW 13 | SW 13 | SW 19 | SW 19 | SW 18 | SW 18 |
Wave Graph | |||||||||||||||||||||
1016 | 1449 | 1237 | 1187 | 1065 | 769 | 521 | 589 | 2127 | 4090 | 3587 | 2905 | 2158 | 1672 | 1094 | 711 | 690 | 738 | 1044 | 1382 | 2078 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross-off | on | cross | glassy | cross-on | cross-on | glassy | cross-on | cross-on | cross-off | on | cross | cross-off | cross-on | cross | cross-off | on | cross | cross-off |
High Tide | 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 | 11:58AM2.77m | 00:13AM2.96m | |||||||
Low Tide | 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 | 5:58AM0.28m | 6:04PM0.24m | ||||||||
6:09 | — | — | 6:09 | — | — | 6:09 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | |
— | 6:01 | — | — | 6:01 | — | — | 6:01 | — | — | 6:01 | — | — | 6:00 | — | — | 6:00 | — | — | 6:00 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 26 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 26 | 25 | 25 | 26 | 25 | 25 | 26 | 25 | 25 | 26 | 25 |
Feels °C | 27 | 27 | 26 | 27 | 27 | 27 | 27 | 26 | 26 | 26 | 27 | 26 | 27 | 26 | 26 | 27 | 28 | 27 | 27 | 28 | 26 |
Swell 1 Height (m) Direction Period (s) | SW 14 | SW 16 | SW 15 | SW 14 | SSW 14 | SW 13 | SSW 12 | SW 12 | SW 18 | SW 17 | SW 16 | SW 16 | SW 16 | SW 15 | SW 14 | SW 13 | SW 13 | SW 13 | SW 19 | SW 18 | SW 18 |
1016 | 1449 | 1237 | 1187 | 1065 | 769 | 521 | 379 | 2127 | 4090 | 3587 | 2905 | 2158 | 1672 | 1094 | 711 | 690 | 527 | 1044 | 1382 | 2078 | |
Swell 2 Height (m) Direction Period (s) | — | — | SE 5 | — | — | SSW 16 | SW 16 | SW 15 | SSW 14 | — | — | SE 6 | SE 5 | S 26 | SSE 5 | SW 22 | SSW 21 | SW 19 | SW 12 | SSW 12 | SE 6 |
— | — | 22 | — | — | 107 | 421 | 589 | 934 | — | — | 20 | 14 | 13 | 15 | 121 | 302 | 738 | 336 | 387 | 33 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | SE 5 | SW 22 | SW 21 | SE 5 | — | — | — | — | S 26 | SSW 24 | SE 5 | S 5 | SE 6 | SSE 6 | — | SW 11 |
— | — | — | — | — | 9 | 166 | 522 | 25 | — | — | — | — | 13 | 54 | 6 | 2 | 21 | 12 | — | 126 | |
Wind waves Height (m) Direction Period (s) | SSE 5 | SE 4 | SE 5 | SE 4 | SE 4 | — | — | SE 6 | — | — | SE 6 | — | — | — | — | — | SSE 5 | — | — | SE 5 | SE 6 |
14 | 28 | 60 | 7 | 6 | — | — | 29 | — | — | 20 | — | — | — | — | — | 8 | — | — | 57 | 92 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 119 | 262 | 0 | 2 | 118 | 0 | 116 | 118 | 0 | 118 | 118 | 0 | 118 | 118 | 0 | 116 | 118 | 0 | 116 | 118 | 21 |
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.











