
Surf Forecasts:
Wanjapu surf forecast from 8 Jul 2026:
- Best quality surf: Saturday 11 Jul, 2AM (local time) - 6ft (1.8m), 16s period, SW swell with cross-offshore winds.
- Most powerful swell: Tuesday 14 Jul, 11PM (local time) - 6ft (1.9m), 18s period, SSW swell with 2,138 kJ wave energy.
- Next surfable swell (1★+): Saturday 11 Jul, 2AM (local time) - 6ft (1.8m), 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 Saturday (Jul 11) at 2AM. The primary swell is predicted to be 1.8m and 16s 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 1.9m 18s and forecast to arrive on Tuesday (Jul 14) at 11PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 6s period and expected on Saturday (Jul 11) at 5PM.
| Wave Type | Time (WITA) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2AM (Sat 11th Jul) | 6ft (1.8m) 16s |
| Best Surf | 2AM (Sat 11th Jul) | 6ft (1.8m) 16s |
| Most Powerful | 11PM (Tue 14th Jul) | 6ft (1.9m) 18s |
Table - best surf conditions forecast for Wanjapu over the next 16 days.
Alright, this is Rusty, and I’ve got a look at what’s coming down the pipe for Wanjapu. It’s a reef setup, exposed to that SW swell, and in the two weeks ahead, it’s mostly a story of frustrated potential.
We kick things off Thursday, July 9th, with some SW swell pushing 7 ft on the morning, a 15-second period, but the wind is a cross-shore SE breeze at 12 mph, putting a bit of a cross-chop on the surface. The energy’s there, reading 2030, but it’s not clean – the conditions are just a bit messy. This sets the tone for a while. The water temp is running about average for this time of year, nothing wild to report.
Friday the 10th and Saturday the 11th offer similar stories. The swell stays in that 5 ft to 6 ft range, but the wind is a constant cross-shore or cross-on. The period is nice and long, 14 to 18 seconds, which gives it good shape and power, but with the wind on it, the surface isn't that classic clean line. The combined energy reads around 1773 to 1341 for those mornings, so there's grunt, but it's fighting the breeze.
Now, the standout – and it’s the one to pencil in – is the morning of Friday, July 17th. We’ve got a clean 5 ft SW swell, but the kicker is the wind: glassy. No chop, no ripple. A 14-second period giving it some push. The energy reading is 997, moderate, but when it’s that glassy, a reef like Wanjapu can really come alive. That 5 ft won’t be huge, but it’ll be clean, which is a major positive. This is the best call of the 16 days, hands down. The only other half-decent look is a couple days later, Sunday July 19th, where we get a cross-off breeze and 6 ft SW swell – that’ll be clean, but not as pristine as that Friday glass-off.
The second week has a bit more swell, with Tuesday July 21st seeing 7 ft in the morning and the energy climbing to 2291. That’s powerful, but there's a cross-shore wind. Thursday the 23rd is the tail end, with the swell fading to 4 ft and a longer 16-second period, but the wind picks up again, so it’s not the highlight.
Honestly, there are a lot of days where the wind is from the SE or S, cross or cross-on, and the waves are just a bit too bumpy to call it great. The energy is moderate to strong, but the quality isn’t there. If you’re looking at that Friday 17th morning with glassy conditions, that’s your window. If you’re a beginner, be careful when the swell pushes over 5 ft, and over 7 ft it’s for experts only. The long period from the SW likes this reef, but the wind needs to play ball.
Rusty, signing off.
Short Range ForecastMostly dry. Warm (max 27°C on Thu morning, min 23°C on Wed night). Winds decreasing (fresh winds from the ESE on Wed night, light winds from the S by Sat afternoon). | Days 5-7 Weather SummaryMostly dry. Warm (max 26°C on Sun morning, min 23°C on Sat night). Wind will be generally light. | ||||||||||||||||||||
Thursday 9 | Friday 10 | Saturday 11 | Sunday 12 | Monday 13 | Tuesday 14 | Wed 15 | |||||||||||||||
Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | |
Swell Height Map | |||||||||||||||||||||
Wave Height (m) Direction Period (s) | SW 16 | SW 15 | SW 15 | SW 15 | SW 18 | SW 16 | SW 16 | SW 15 | SW 14 | SW 14 | SW 14 | SW 13 | SW 13 | SW 13 | SSW 21 | SSW 19 | SSW 17 | SSW 18 | SSW 16 | SSW 17 | SW 16 |
Wave Graph | |||||||||||||||||||||
2205 | 1936 | 1619 | 1045 | 1111 | 1852 | 1602 | 1237 | 1187 | 725 | 534 | 424 | 136 | 282 | 288 | 758 | 1120 | 1663 | 1141 | 1970 | 1652 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross | cross | cross-off | cross | cross | cross-off | cross | cross-on | off | cross-on | cross | cross-off | cross-on | cross | cross-off | cross | cross | cross-off | cross | cross |
High Tide | 3:52AM2.44m | 4:25PM1.80m | 4:52AM2.44m | 6:06PM1.67m | 6:06AM2.47m | 7:51PM1.70m | 7:23AM2.57m | 9:08PM1.84m | 8:32AM2.73m | 10:02PM2.02m | 9:32AM2.89m | 10:47PM2.21m | 10:25AM3.01m | ||||||||
Low Tide | 9:14PM0.84m | 10:35AM0.92m | 10:00PM1.02m | 12:01PM0.86m | 11:06PM1.16m | 1:33PM0.70m | 00:38AM1.23m | 2:47PM0.48m | 2:08AM1.17m | 3:44PM0.26m | 3:17AM1.01m | 4:31PM0.09m | 4:14AM0.84m | 5:13PM-0.01m | |||||||
— | 6:20 | — | — | 6:20 | — | — | 6:20 | — | — | 6:20 | — | — | 6:20 | — | — | 6:20 | — | — | 6:20 | — | |
5:55 | — | 5:55 | — | — | 5:55 | — | — | 5:57 | — | — | 5:57 | — | — | 5:57 | — | — | 5:57 | — | — | 5:58 | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 |
Temp °C | 25 | 27 | 27 | 25 | 26 | 26 | 25 | 26 | 26 | 25 | 26 | 26 | 25 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 25 |
Feels °C | 22 | 26 | 26 | 22 | 25 | 25 | 23 | 27 | 28 | 26 | 28 | 28 | 26 | 28 | 28 | 28 | 27 | 26 | 25 | 26 | 24 |
Swell 1 Height (m) Direction Period (s) | SW 16 | SW 15 | SW 15 | SW 15 | SW 18 | SW 16 | SW 16 | SW 15 | SW 14 | SW 14 | SW 14 | SW 13 | SE 6 | SW 13 | SW 13 | SSW 19 | SSW 17 | SSW 18 | SSW 16 | SSW 17 | SW 16 |
2205 | 1936 | 1619 | 1045 | 1111 | 1852 | 1602 | 1237 | 1187 | 725 | 534 | 424 | 39 | 282 | 265 | 758 | 1120 | 1663 | 1141 | 1970 | 1652 | |
Swell 2 Height (m) Direction Period (s) | — | SW 24 | SW 21 | SW 19 | SW 14 | — | SSE 6 | SSE 6 | SSE 6 | SSE 6 | SE 6 | SSE 6 | SW 13 | SE 6 | SSW 21 | SE 6 | SW 20 | SSW 21 | SSW 19 | — | — |
— | 22 | 117 | 540 | 604 | — | 64 | 29 | 30 | 51 | 14 | 20 | 136 | 18 | 288 | 54 | 388 | 297 | 943 | — | — | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | S 6 | — | — | S 6 | — | SW 12 | S 6 | W 15 | SW 12 | SSE 6 | — | SE 7 | — | — |
— | — | — | — | — | — | — | 19 | — | — | 12 | — | 114 | 12 | 4 | 203 | 33 | — | 88 | — | — | |
Wind waves Height (m) Direction Period (s) | SE 6 | SE 6 | SE 6 | SE 6 | SSE 6 | SSE 6 | SE 6 | SE 6 | ESE 6 | — | — | SE 6 | — | — | SE 6 | SE 6 | — | SE 6 | SE 7 | SSE 7 | SE 6 |
69 | 72 | 150 | 59 | 58 | 105 | 122 | 56 | 26 | — | — | 56 | — | — | 34 | 152 | — | 89 | 244 | 57 | 107 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 33 | 119 | 407 | 33 | 119 | 116 | 0 | 116 | 108 | 0 | 2 | 116 | 0 | 2 | 118 | 0 | 119 | 118 | 33 | 119 | 118 |
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.











