
Surf Forecasts:
Wanjapu surf forecast from 20 Jul 2026:
- Best quality surf: Saturday 25 Jul, 8AM (local time) - 6.5ft (2.0m), 8s period, SE swell with cross-offshore winds.
- Most powerful swell: Monday 20 Jul, 2PM (local time) - 6.5ft (2.0m), 17s period, SW swell with 2,320 kJ wave energy.
- Next surfable swell (1★+): Saturday 25 Jul, 5AM (local time) - 6ft (1.8m), 8s period with SE 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 Saturday (Jul 25) at 5AM. The primary swell is predicted to be 1.8m and 8s period with a secondary swell of 1.1m and 8s. Another secondary swell of 0.7m and 12s 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 2.0m 17s and forecast to arrive on Monday (Jul 20) at 2PM. 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 (Sat 25th Jul) | 6ft (1.8m) 8s |
| Best Surf | 8AM (Sat 25th Jul) | 6.5ft (2.0m) 8s |
| Most Powerful | 2PM (Mon 20th Jul) | 6.5ft (2.0m) 17s |
Table - best surf conditions forecast for Wanjapu over the next 16 days.
The Lowdown
Alright folks, it’s Rusty here. Let’s have a look at what’s coming up for Wanjapu. This is a solid reef break, exposed to the SW, and it’s a consistent wave when the conditions line up. It’s an advanced wave, so you’ve gotta be on your game, and it can get crowded at times, so keep your head on a swivel.
The water is sitting at 80°, which is bang on average for this time of year, so no surprises there.
The good news is there’s a massive pulse of long-period groundswell kicking off the forecast on Monday the 20th of July. We’re looking at a solid 7ft SW swell with a period of 17 seconds, and the combined energy is a massive 2416 – that’s proper strong. The trouble is, the wind is cross from the SE, so it’s going to be a bit lumpy with a cross-chop. Not the cleanest, but there’s plenty of power. The morning is the better call on Monday, as the afternoon winds pick up a notch.
Tuesday the 21st still has some size, around 6ft from the SW, but the period drops to 14 seconds and the wind stiffens to 16 mph cross-shore, making it messier. By Wednesday the 22nd, the swell really backs off, dropping to 4ft, and the energy is down to 667 (moderate). The wind is still cross and strong, so the quality is poor. Honestly, from Wednesday right through to the end of the month, it’s a bit of a flat spell for real quality. There are a few pulses of swell, but the wind is persistently cross or cross-off, and the wave comment keeps flagging marginal or poor conditions.
Now, there’s a glimmer on the horizon. Towards the end of the month, from the 30th of July, we see a new long-period SW groundswell filling in. The morning of Thursday the 30th is small, just 3ft, but with a period of 19 seconds and light winds. The energy is up to 1391 (moderate). The afternoon gets better, with 4ft and a 19-second period, and energy jumping to 1722. The wind is light cross-shore, so it’ll be a bit rippled but far from blown out.
The standout session looks like Friday the 31st of July. The morning has 6ft of SSW swell, period of 17 seconds, and a very light cross-onshore wind. The combined energy is a punchy 2031 (strong). The water will be clean with just small wind ripples. This is the best on offer, but it’s still a marginal call due to tide. The afternoon holds similar size at 6ft, but the wind goes cross again, so the morning is the window.
Going into the first week of August, we’ve got a slow decline. Saturday the 1st of August is still fun, with 5ft SSW swell in the morning, 16-second period, and light cross winds. The afternoon is cleaner with a cross-off breeze and 5ft SW swell. Both sessions have moderate energy (1416 and 1397). After that, the swell fades into the 3ft range with lower energy, so the real quality is gone by Sunday the 2nd.
The best bet in the whole forecast is Friday the 31st of July morning at Wanjapu. The swell is solid, the period is long, the energy is strong, and the wind is light. It’s a reef break, so that long period groundswell will really wrap in and give you some proper clean lines. It’s the pick of the 16 days, no question.
Rusty.
Short Range ForecastMostly dry. Warm (max 26°C on Mon afternoon, min 23°C on Tue night). Mainly fresh winds. | Days 4-6 Weather SummaryMostly dry. Warm (max 26°C on Thu morning, min 23°C on Thu night). Winds decreasing (fresh winds from the SE on Thu night, light winds from the ESE by Sat morning). | ||||||||||||||||||||
Monday 20 | Tuesday 21 | Wednesday 22 | Thursday 23 | Friday 24 | Saturday 25 | Sunday 26 | |||||||||||||||
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 17 | SW 16 | SW 16 | SW 14 | SW 14 | SW 14 | SW 13 | SW 13 | SSW 13 | SSW 14 | SW 14 | SW 14 | SSW 13 | SSW 13 | SE 7 | SSW 15 | SE 8 | SSW 14 | SSW 13 | SSE 8 | SE 8 |
Wave Graph | |||||||||||||||||||||
2375 | 2173 | 1909 | 1340 | 1187 | 811 | 509 | 382 | 458 | 268 | 463 | 469 | 304 | 295 | 392 | 443 | 408 | 246 | 229 | 294 | 533 | |
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 | cross | cross-off | cross | cross | cross-off | cross | cross | cross-off | cross | cross | cross-off |
High Tide | 2:00PM2.39m | 2:32AM2.62m | 2:41PM2.12m | 3:10AM2.50m | 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 | ||||||||
Low Tide | 8:04AM0.64m | 8:06PM0.52m | 8:49AM0.76m | 8:36PM0.74m | 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 | |||||||
6:20 | — | — | 6:20 | — | — | 6:20 | — | — | 6:20 | — | — | 6:20 | — | — | 6:20 | — | — | 6:20 | — | — | |
— | 5:59 | — | — | 5:59 | — | — | 5:59 | — | — | 5:59 | — | — | 5:59 | — | — | 6:00 | — | — | 6:00 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 1 |
Temp °C | 25 | 26 | 25 | 26 | 25 | 25 | 26 | 25 | 25 | 26 | 26 | 25 | 26 | 26 | 25 | 25 | 26 | 25 | 26 | 26 | 24 |
Feels °C | 25 | 26 | 23 | 24 | 23 | 22 | 23 | 23 | 22 | 22 | 23 | 21 | 25 | 25 | 22 | 25 | 25 | 22 | 23 | 24 | 21 |
Swell 1 Height (m) Direction Period (s) | SW 17 | SW 16 | SW 16 | SW 14 | SW 14 | SW 14 | SW 13 | SW 13 | SSW 13 | SW 12 | SW 14 | SW 14 | SSW 13 | SSW 13 | SSE 8 | SSW 15 | SSW 14 | SSW 14 | SSW 13 | SW 13 | SE 8 |
2375 | 2173 | 1909 | 1340 | 1187 | 811 | 509 | 382 | 458 | 195 | 463 | 469 | 304 | 295 | 173 | 443 | 367 | 246 | 229 | 183 | 161 | |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | SW 18 | SSW 16 | SSW 15 | SSW 14 | SW 18 | SW 18 | SW 18 | SSW 16 | SW 12 | S 9 | WSW 17 | SW 16 | SW 15 | SW 15 | SW 13 |
— | — | — | — | — | — | 78 | 166 | 152 | 268 | 49 | 12 | 78 | 155 | 227 | 56 | 30 | 66 | 60 | 55 | 183 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | SW 18 | WSW 16 | SW 16 | SSW 16 | WSW 18 | — | — | SW 15 | — | S 8 |
— | — | — | — | — | — | — | — | — | — | — | 12 | 25 | 40 | 226 | 31 | — | — | 57 | — | 55 | |
Wind waves Height (m) Direction Period (s) | SSE 6 | SE 6 | SE 6 | SE 6 | SE 5 | SE 6 | SE 6 | SE 6 | SE 6 | SSE 6 | SSE 6 | SSE 6 | SSE 6 | SE 6 | SE 7 | SE 8 | SE 8 | SE 7 | SSE 8 | SSE 8 | SE 8 |
41 | 89 | 102 | 80 | 85 | 80 | 80 | 108 | 83 | 82 | 119 | 97 | 62 | 201 | 392 | 196 | 408 | 211 | 204 | 294 | 533 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 119 | 118 | 108 | 120 | 265 | 108 | 262 | 265 | 108 | 265 | 265 | 33 | 119 | 265 | 33 | 119 | 118 | 108 | 119 | 1682 | 33 |
Best forecast wave conditions in Sumba | |||||||||||||||||||||
Best forecast wave conditions in Indonesia | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)
Wind Speed (km/h)
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.










