
Surf Forecasts:
Wanjapu surf forecast from 25 Jul 2026:
- Best quality surf: Thursday 30 Jul, 8PM (local time) - 3ft (0.9m), 19s period, SSW swell with cross-offshore winds.
- Most powerful swell: Saturday 1 Aug, 8PM (local time) - 5.5ft (1.7m), 18s period, SW swell with 1,777 kJ wave energy.
- Next surfable swell (1★+): Thursday 30 Jul, 5AM (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 Thursday (Jul 30) at 5AM. The primary swell is predicted to be 1.2m and 14s period with a secondary swell of 0.9m and 6s. Another secondary swell of 1.3m 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 1.7m 18s and forecast to arrive on Saturday (Aug 01) at 8PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 6s period and expected on Saturday (Aug 01) at 2AM.
| Wave Type | Time (WITA) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5AM (Thu 30th Jul) | 4ft (1.2m) 14s |
| Best Surf | 8PM (Thu 30th Jul) | 3ft (0.9m) 19s |
| Most Powerful | 8PM (Sat 1st Aug) | 5.5ft (1.7m) 18s |
Table - best surf conditions forecast for Wanjapu over the next 16 days.
The Lowdown
Alright, folks. Rusty here. Let’s break down the next 16 days. We’ve got only one break in the mix, a proper reef setup that needs everything to line up. It’s a slow start, so don’t get too wound up.
Kicking off with Wanjapu. The water is sitting at about 79°, which is pretty average for the time of year. The first week is a total washout. On the afternoon of the 25th, you’ve got a 1.0m SSW swell with a 14-second period, pushing 831 moderate energy, but the wind is a messy cross-off at 25 km/h from the ESE. It’s barely surfable.
There’s a big gap from there. Through the end of the week, it’s all cross-shore winds and poor conditions. You’ll see small pulses, like 0.6m on Monday morning, but it’s just a tease. The wind is never right. The wave comment is stuck on “poor surf conditions.” It’s a dry spell.
Then we get a real window. The morning of Saturday, the 1st of August, is a standout. The wind goes glassy—zero wind from the west. The swell is 1.3m from the SSW, with a 16-second period, and the energy is strong at 1408. That’s clean, lined-up reef surfing. The swell direction is a perfect match for the optimum SW, and the waves are going to be well-shaped. It’s not huge, but it’s quality. Crowds are "sometimes", so you might have some company, but it’s worth it.
The next morning, Sunday the 2nd, is also looking sharp. Glassy again, 1.8m from the SW with a 16-second period, and energy cranking at 1673. That’s a proper groundswell pushing through the reef. It’s a step up in size, but clean. This is the best on offer. The 1.8m is getting into the "not for beginners" territory, but for the advanced crew, it’s a dream.
Later in the week, on the 6th of August, the swell jumps to 2.5m from the SSW with a 17-18 second period. The energy is massive at 3875. This is a big, powerful, very long-period groundswell. For a reef, that’s a beautiful thing, but 2.5m is expert-only. The wind is a light cross-shore, but it’s in the window. The sets will be long and clean. If you’re not an advanced surfer, stay on the sand.
The second week stays solid with 2.2m to 1.9m SSW swells, but the wind is always a little cross or cross-on. It’s not as perfect as that first weekend window. The 7th and 8th have some light airs, so you might get a window, but the consistency isn’t there.
The bottom line: the first week is a dud. The standouts are the morning of the 1st of August and the morning of the 2nd of August. The 6th of August is a monster, but for experts only. Don’t bother before that.
Rusty.
Short Range ForecastLight rain (total 6mm), mostly falling on Sat afternoon. Warm (max 26°C on Sun morning, min 23°C on Sat night). Mainly fresh winds. | Days 5-7 Weather SummaryMostly dry. Warm (max 25°C on Tue afternoon, min 23°C on Tue night). Wind will be generally light. | |||||||||||||||||||
Sat 25 | Sunday 26 | Monday 27 | Tuesday 28 | Wednesday 29 | Thursday 30 | Friday 31 | ||||||||||||||
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 14 | SE 9 | SSE 9 | SE 7 | SE 8 | 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 18 | SW 17 | SW 16 |
Wave Graph | ||||||||||||||||||||
437 | 1188 | 258 | 429 | 535 | 116 | 268 | 308 | 318 | 314 | 429 | 489 | 523 | 508 | 553 | 643 | 565 | 1021 | 679 | 1057 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross | cross | cross-off | cross | cross | cross-off | cross | cross | cross-off | cross | cross | cross-off | cross | cross | cross-off | cross-on | cross | cross-off |
High Tide | 8:44PM1.58m | 7:40AM2.18m | 9:42PM1.74m | 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 | |||||||
Low Tide | 00:50AM1.43m | 3:15PM0.78m | 2:33AM1.35m | 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 | ||||||||
— | — | 6:20 | — | — | 6:20 | — | — | 6:20 | — | — | 6:20 | — | — | 6:20 | — | — | 6:18 | — | — | |
6:00 | — | — | 6:00 | — | — | 6:00 | — | — | 6:00 | — | — | 6:00 | — | — | 6:00 | — | — | 6:00 | — | |
mm | 2 | 2 | — | 2 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 25 | 24 | 26 | 26 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 |
Feels °C | 24 | 23 | 25 | 24 | 22 | 25 | 24 | 24 | 23 | 24 | 23 | 25 | 24 | 24 | 26 | 25 | 26 | 27 | 28 | 28 |
Swell 1 Height (m) Direction Period (s) | SSW 14 | SSE 9 | SW 13 | SW 13 | SSE 7 | S 8 | SW 13 | SSE 7 | SSW 16 | SSW 16 | SW 15 | SW 15 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | SSW 18 | SW 17 | SW 16 |
437 | 421 | 183 | 183 | 183 | 74 | 142 | 113 | 318 | 314 | 429 | 489 | 523 | 508 | 553 | 553 | 419 | 1021 | 679 | 1057 | |
Swell 2 Height (m) Direction Period (s) | WSW 17 | SSW 14 | SW 15 | SW 15 | SSW 13 | SW 14 | SSW 18 | SW 13 | SW 12 | SW 12 | S 6 | SSE 6 | SW 23 | SSE 6 | SSE 6 | SSW 19 | SSW 18 | SSW 13 | SSW 14 | SE 6 |
29 | 250 | 57 | 55 | 114 | 116 | 120 | 138 | 92 | 93 | 52 | 60 | 21 | 80 | 44 | 643 | 565 | 215 | 323 | 10 | |
Swell 3 Height (m) Direction Period (s) | — | SW 16 | — | — | SW 15 | SSW 12 | — | SSW 16 | — | — | — | SW 24 | — | SW 21 | SSW 20 | — | SSE 6 | SSE 6 | SSE 6 | S 7 |
— | 66 | — | — | 54 | 57 | — | 181 | — | — | — | 22 | — | 116 | 256 | — | 62 | 26 | 25 | 15 | |
Wind waves Height (m) Direction Period (s) | SSE 8 | SE 9 | SSE 9 | SE 7 | SE 8 | SE 7 | SE 7 | SE 7 | SSE 6 | SE 6 | SE 6 | SE 6 | SE 6 | SE 6 | SE 6 | SSE 6 | — | — | — | — |
365 | 1188 | 258 | 429 | 535 | 71 | 268 | 308 | 113 | 139 | 64 | 157 | 108 | 161 | 122 | 60 | — | — | — | — | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 118 | 20 | 119 | 119 | 33 | 119 | 118 | 21 | 119 | 116 | 108 | 119 | 119 | 2 | 119 | 118 | 0 | 119 | 108 | 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.










