
Surf Forecasts:
Wanjapu surf forecast from 6 Aug 2026:
- Best quality surf: Friday 7 Aug, 8PM (local time) - 8ft (2.5m), 16s period, SW swell with cross-offshore winds.
- Most powerful swell: Tuesday 11 Aug, 2AM (local time) - 8ft (2.5m), 17s period, SSW swell with 4,372 kJ wave energy.
- Next surfable swell (1★+): Friday 7 Aug, 2AM (local time) - 7ft (2.1m), 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 Friday (Aug 07) at 2AM. The primary swell is predicted to be 2.1m and 16s period with a secondary swell of 0.7m 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 17s and forecast to arrive on Tuesday (Aug 11) at 2AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.5m 6s period and expected on Friday (Aug 07) at 11PM.
| Wave Type | Time (WITA) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2AM (Fri 7th Aug) | 7ft (2.1m) 16s |
| Best Surf | 8PM (Fri 7th Aug) | 8ft (2.5m) 16s |
| Most Powerful | 2AM (Tue 11th Aug) | 8ft (2.5m) 17s |
Table - best surf conditions forecast for Wanjapu over the next 16 days.
The Lowdown
Alright folks, this is Rusty comin' at ya with a long-range look at Wanjapu. It's a solid, exposed reef that loves a good SW groundswell, and we've got some serious energy headin' our way. The water temp is about average for this time of year, so nothin' out of the ordinary there.
The first thing you gotta know is that this isn't a "grab your board and go" situation right now. The forecast is a bit of a slow burn, with a whole lot of "marginal" conditions in the first week. The swell is there, but the wind is blowin' cross or cross-onshore most of the time, which is gonna chop things up. Friday the 7th sees a solid 8ft to 8ft SSW swell rolling in, with a very long 16-second period, but it's messy. The combined energy is strong (2863 to 3549), but the wind is just not your friend. This pattern continues right through to Monday the 11th, with the swell staying in the 8ft to 8ft range and a whole lot of cross-shore chop. It's big, it's powerful, but it's not clean.
Now, there's a little glimmer of hope on Sunday the 9th afternoon. The wind goes light cross-off, the swell holds at 7ft from the SW, and the energy is strong (2255). The report even calls it "clean." That's your best bet for the first week, but it's a short window. For a solid reef like Wanjapu, that light offshore wind is a game-changer, so if you can get out there, you might score a few.
The real standout, the one you circle on the calendar, is lookin' like Wednesday the 19th of August. We've got a 10ft SW swell with a 17-second period, and the wind is forecast to be a light, clean cross-off breeze. The combined energy is a massive 4401, which is some serious power. This is a big, powerful groundswell, and it's gonna be fast and heavy on that reef. The report says "excellent surf conditions for experienced surfers," and I'm not gonna argue. This is not for the faint of heart; 10ft is a solid step up, and the long period means it'll be deep and bowly. This is the one to chase.
The days leading up to it, Monday the 18th, look a bit average with 15 mph cross-shore winds. Then on Thursday the 20th, the swell is still big at 10ft, but the wind is more cross-shore, which will take the edge off the perfection. The energy is even higher (5310 to 5435), but the wind isn't as kind. Wednesday the 19th is the clear winner.
The second week sees the swell ease off a bit, with the 22nd bringing a 7ft SW swell. The energy drops to 1755, and the wind is light cross-onshore. It's a bit of a fade-out, but that Wednesday session is the one that'll be remembered.
So, to sum it up: the first week is a test of patience with a lot of wind-affected swell. Sunday the 9th afternoon is a brief window of clean waves. The absolute standout, your best bet for a proper session, is Wednesday the 19th of August. That's your day. Keep your eyes on the forecast, as things can always tighten up, but that's the one to aim for.
Rusty, out.
Short Range ForecastMostly dry. Warm (max 26°C on Fri morning, min 23°C on Thu night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 26°C on Tue morning, min 23°C on Sun night). Wind will be generally light. | ||||||||||||||||||
Friday 7 | Saturday 8 | Sunday 9 | Monday 10 | Tuesday 11 | Wednesday 12 | ||||||||||||||
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 16 | SW 16 | SSW 16 | SW 16 | SSW 16 | SSW 16 | SSW 16 | SSW 16 | SW 16 | SSW 15 | SW 14 | SSW 18 | SSW 17 | SSW 17 | SSW 16 | SSW 16 | SSW 17 | SSW 17 | SSW 16 |
Wave Graph | |||||||||||||||||||
2146 | 2795 | 3549 | 3319 | 3062 | 2821 | 2472 | 2518 | 2233 | 1911 | 1340 | 3634 | 4372 | 3680 | 2648 | 2550 | 2643 | 2072 | 1750 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-on | cross | cross-off | cross-on | cross | cross | cross | cross-off | cross-off | cross-on | cross-on | cross | cross-on | cross | cross | cross | cross | cross-off |
High Tide | 2:59AM2.58m | 3:35PM1.72m | 3:56AM2.45m | 5:28PM1.51m | 5:27AM2.35m | 8:08PM1.58m | 7:16AM2.41m | 9:21PM1.83m | 8:37AM2.59m | 10:03PM2.10m | 9:36AM2.79m | 10:39PM2.37m | |||||||
Low Tide | 8:26PM0.81m | 9:51AM0.81m | 9:01PM1.02m | 11:22AM0.90m | 9:58PM1.24m | 1:29PM0.82m | 00:15AM1.38m | 2:52PM0.59m | 2:20AM1.24m | 3:43PM0.35m | 3:28AM0.99m | 4:23PM0.17m | 4:18AM0.72m | ||||||
— | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | |
6:00 | — | 6:00 | — | — | 6:00 | — | — | 6:00 | — | — | 6:00 | — | — | 6:01 | — | — | 6:01 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 25 | 26 | 26 | 25 | 25 | 26 | 25 | 26 | 25 | 25 | 24 | 25 | 24 | 26 | 26 | 24 | 25 | 25 | 25 |
Feels °C | 26 | 27 | 27 | 27 | 27 | 26 | 24 | 26 | 26 | 25 | 26 | 26 | 24 | 26 | 25 | 23 | 25 | 26 | 24 |
Swell 1 Height (m) Direction Period (s) | SW 16 | SW 16 | SSW 16 | SW 16 | SSW 16 | SSW 16 | SSW 16 | SSW 16 | SW 16 | SSW 15 | SW 14 | SSW 18 | SSW 17 | SSW 17 | SSW 16 | SSW 16 | SSW 17 | SSW 17 | SSW 16 |
2146 | 2795 | 3549 | 3319 | 3062 | 2821 | 2472 | 2518 | 2233 | 1911 | 1340 | 3634 | 4372 | 3680 | 2648 | 2550 | 2643 | 2072 | 1750 | |
Swell 2 Height (m) Direction Period (s) | SE 6 | SE 6 | — | SE 6 | — | WSW 20 | — | — | — | — | SSW 19 | — | SSW 21 | — | SW 19 | — | — | — | — |
35 | 51 | — | 25 | — | 39 | — | — | — | — | 1044 | — | 1154 | — | 1351 | — | — | — | — | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | SE 6 | SE 6 | ESE 5 | SE 6 | SE 5 | SE 4 | SE 5 | SE 4 | SSE 4 | — | — | — | — | — | — | SE 4 | SSE 6 | — | — |
102 | 17 | 87 | 72 | 25 | 27 | 35 | 27 | 22 | — | — | — | — | — | — | 6 | 48 | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 0 | 120 | 118 | 0 | 118 | 262 | 108 | 118 | 0 | 0 | 118 | 118 | 33 | 119 | 358 | 108 | 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.











