
Surf Forecasts:
Wanjapu surf forecast from 22 Jul 2026:
- Best quality surf: Sunday 26 Jul, 8AM (local time) - 7ft (2.2m), 8s period, SE swell with cross-offshore winds.
- Most powerful swell: Wednesday 29 Jul, 2AM (local time) - 4.5ft (1.3m), 15s period, SSW swell with 720 kJ wave energy.
- Next surfable swell (1★+): Friday 24 Jul, 5AM (local time) - 3ft (0.9m), 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 Friday (Jul 24) at 5AM. The primary swell is predicted to be 0.9m 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 1.3m 15s and forecast to arrive on Wednesday (Jul 29) at 2AM. Winds are predicted to be cross-offshore at the time the swell arrives.
| Wave Type | Time (WITA) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5AM (Fri 24th Jul) | 3ft (0.9m) 14s |
| Best Surf | 8AM (Sun 26th Jul) | 7ft (2.2m) 8s |
| Most Powerful | 2AM (Wed 29th Jul) | 4.5ft (1.3m) 15s |
Table - best surf conditions forecast for Wanjapu over the next 16 days.
The Lowdown
G'day, I'm Rusty. Let's have a look at what's on the cards for us.
Alright, the first thing you need to know is that the next week and a bit is a bit of a write-off. We're looking at a long stretch of marginal to poor conditions from the start of the forecast on the 22nd of July all the way through to the end of the month. The swell is there, but it's just not coming together with the wind. We've got a persistent cross-shore breeze, mostly from the southeast, that's keeping things lumpy and messy. It's not until we hit the first of August that things really start to turn around.
So, for the first week, from the 22nd of July for about ten days, you're better off finding something else to do. The surf quality is just not there. There's a slight bump in energy on the 25th with a short period swell from the southeast at 6 ft, but the wind is swinging around and the period is a low 8 seconds, so it's not going to be any good. Then, on the 28th, we get a 16-second groundswell, but it's only 3 ft and the wind is still cross-shore, so it's just frustrating.
Now, the real story starts on the 1st of August. That's when the magic happens. The standout window is from the 1st of August through to the 3rd of August. We get a solid SW groundswell, with a period of 14 to 16 seconds, which is a proper long-period groundswell. The combined swell energy is strong, hitting between 1001 and 1698, so there's plenty of power. But the best part is the wind. We're looking at glassy conditions, with a slight air and offshores from the west-southwest or northwest. That's the absolute dream ticket for a reef break like Wanjapu. The water temperature is sitting at 80°F, which is pretty much normal for this time of year, so no wetsuit needed. The swell is around 5 ft to 6 ft, which is a nice size, but it's a bit much for beginners. It's a consistent, advanced reef break that's exposed to the SW, so it's going to be handling that groundswell perfectly. Just be aware that crowds are possible here, so get there early.
The week after, from the 4th of August onward, the swell sticks around but the wind starts to shift. We get a huge push of energy, with combined swell energy readings hitting over 3000, and the swell size bumps up to 7 ft to 8 ft on the 5th and 6th of August. That's a big, powerful swell that's only for experienced surfers. The period is still good, 15 to 19 seconds, but the wind is cross-onshore, which will put a bit of a crumble on the face. It's still surfable, but it's not the perfection of the first few days of August.
This is Rusty, signing off. See you in the water.
Short Range ForecastMostly dry. Warm (max 26°C on Fri afternoon, min 23°C on Thu night). Mainly fresh winds. | Days 4-6 Weather SummaryLight rain (total 2mm), mostly falling on Sat afternoon. Warm (max 26°C on Sun morning, min 23°C on Sat morning). Winds increasing (light winds from the SSE on Sat morning, fresh winds from the SE by Sun afternoon). | ||||||||||||||||||||
Wednesday 22 | Thursday 23 | Friday 24 | Saturday 25 | Sunday 26 | Monday 27 | Tuesday 28 | |||||||||||||||
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) | SSW 13 | SW 13 | SSW 13 | SSW 14 | SSW 14 | SSW 14 | SSW 13 | SSW 13 | SSW 16 | SSW 15 | SE 8 | SE 8 | SSE 8 | SE 7 | SE 7 | SW 14 | SE 7 | SE 7 | SW 16 | SSW 16 | SSW 15 |
Wave Graph | |||||||||||||||||||||
581 | 382 | 458 | 268 | 538 | 357 | 362 | 295 | 318 | 443 | 416 | 719 | 248 | 349 | 452 | 116 | 227 | 233 | 362 | 441 | 720 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross | cross | cross | cross-off | cross | cross | cross-off | cross-on | cross-off | cross-off | cross | cross | cross-off | cross | cross | cross-off | cross-on | cross | cross-off |
High Tide | 3:28PM1.85m | 3:54AM2.36m | 4:35PM1.62m | 4:51AM2.22m | 6:36PM1.51m | 6:14AM2.14m | 8:44PM1.58m | 7:40AM2.18m | 9:42PM1.74m | 8:44AM2.30m | 10:17PM1.91m | 9:32AM2.46m | 10:45PM2.07m | ||||||||
Low Tide | 9:39AM0.90m | 9:06PM0.96m | 10:44AM1.01m | 9:41PM1.16m | 12:23PM1.06m | 10:37PM1.34m | 2:13PM0.95m | 00:50AM1.43m | 3:15PM0.78m | 2:33AM1.35m | 3:54PM0.60m | 3:28AM1.20m | 4:26PM0.44m | 4:08AM1.04m | |||||||
6:20 | — | — | 6:20 | — | — | 6:20 | — | — | 6:20 | — | — | 6:20 | — | — | 6:20 | — | — | 6:20 | — | — | |
— | 5:59 | — | — | 5:59 | — | — | 5:59 | — | — | 6:00 | — | — | 6:00 | — | — | 6:00 | — | — | 6:00 | — | |
mm | — | — | — | — | — | — | — | — | — | — | 1 | 1 | — | — | — | — | — | — | — | — | 1 |
Temp °C | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 26 | 25 | 25 | 25 | 25 | 26 | 26 | 25 | 26 | 26 | 25 | 26 | 26 | 26 |
Feels °C | 22 | 23 | 22 | 21 | 22 | 22 | 23 | 25 | 23 | 26 | 23 | 23 | 25 | 23 | 23 | 27 | 26 | 24 | 28 | 28 | 27 |
Swell 1 Height (m) Direction Period (s) | SSW 13 | SW 13 | SSW 13 | SW 12 | SSW 14 | SSE 6 | SSW 13 | SSW 13 | SSE 7 | SSW 15 | SSW 14 | SSE 8 | SW 13 | SW 13 | SE 8 | S 7 | SSW 17 | SSE 7 | SW 16 | SSW 16 | SSW 15 |
581 | 382 | 458 | 195 | 538 | 90 | 362 | 295 | 167 | 443 | 367 | 248 | 183 | 183 | 94 | 61 | 200 | 110 | 362 | 441 | 720 | |
Swell 2 Height (m) Direction Period (s) | SW 18 | SSW 16 | SSW 15 | SSW 14 | SW 18 | SSW 14 | SW 18 | SSW 16 | SSW 12 | WSW 18 | WSW 17 | SSW 14 | SW 15 | SW 15 | S 7 | SW 14 | SSW 12 | SW 13 | SSE 6 | SW 12 | SSE 6 |
80 | 166 | 152 | 268 | 49 | 357 | 78 | 155 | 199 | 31 | 29 | 250 | 57 | 55 | 86 | 116 | 61 | 138 | 57 | 93 | 67 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | SSW 8 | WSW 16 | SW 16 | SSW 16 | — | — | SW 16 | SW 15 | — | SW 13 | SSW 12 | SW 13 | SSW 16 | SW 12 | — | S 26 |
— | — | — | — | — | 26 | 25 | 40 | 318 | — | — | 66 | 57 | — | 183 | 57 | 62 | 179 | 92 | — | 13 | |
Wind waves Height (m) Direction Period (s) | SE 5 | SE 6 | SE 6 | SE 5 | SSE 5 | SE 6 | SSE 6 | SSE 6 | SE 7 | SSE 7 | SE 8 | SE 8 | SSE 8 | SE 7 | SE 7 | SE 8 | SE 7 | SE 7 | SE 7 | SE 6 | SE 6 |
74 | 88 | 72 | 60 | 75 | 171 | 38 | 74 | 279 | 127 | 416 | 719 | 248 | 349 | 452 | 57 | 227 | 233 | 159 | 120 | 190 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 118 | 265 | 108 | 265 | 265 | 20 | 119 | 118 | 20 | 119 | 262 | 33 | 119 | 262 | 20 | 119 | 262 | 20 | 119 | 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.










