
Surf Forecasts:
Wanjapu surf forecast from 15 Jul 2026:
- Best quality surf: Wednesday 15 Jul, 11PM (local time) - 5.5ft (1.7m), 16s period, SW swell with cross-offshore winds.
- Most powerful swell: Monday 20 Jul, 11AM (local time) - 7ft (2.1m), 17s period, SSW swell with 2,611 kJ wave energy.
- Next surfable swell (1★+): Wednesday 15 Jul, 11PM (local time) - 5.5ft (1.7m), 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 Wednesday (Jul 15) at 11PM. The primary swell is predicted to be 1.7m and 16s period with a secondary swell of 1.1m 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 2.1m 17s and forecast to arrive on Monday (Jul 20) at 11AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.0m 7s period and expected on Wednesday (Jul 15) at 11PM.
| Wave Type | Time (WITA) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11PM (Wed 15th Jul) | 5.5ft (1.7m) 16s |
| Best Surf | 11PM (Wed 15th Jul) | 5.5ft (1.7m) 16s |
| Most Powerful | 11AM (Mon 20th Jul) | 7ft (2.1m) 17s |
Table - best surf conditions forecast for Wanjapu over the next 16 days.
The Lowdown
Alright, this is Rusty. Let's get straight into it, folks. The next 16 days are a bit of a mixed bag for our local reef. The biggest story is the water temp: 80°F right now, which is bang on average for this time of year, so no surprises there.
The first real pulse of energy hits on Wednesday 15 July. We’ve got a solid, long-period groundswell from the SSW, right in the optimum slot for Wanjapu. The swell is 6ft with a 16-second period, which is a dreamy interval for a reef setup like this. It’s a good size with serious energy (2046). The wind is a light cross from the SSE, so it’s going to be a bit bumpy but still very rideable. This is a solid, consistent spot, so it should be handling that long-period energy well. I’d say Wednesday morning is the pick of the first week.
Thursday 16 July sees the swell drop a touch to 5ft with the same long period, but the wind swings more cross-on, making it less appealing. The energy is still moderate (1320), but that morning session is worth a look if you’re desperate.
Friday 17 July through Sunday 19 July is a bit of a let-down. The swell drops off and the wind stays cross, ruining the potential. The waves are there, but the quality is poor. Energy values drop into the 700-1000 range, and the wind is just too strong from the SE to keep it clean. The setup is better for a kite than a paddle.
Now, Monday 20 July is interesting. The swell jumps back up to 7ft from the SSW with a 17-second period. That’s a big, powerful, long-period groundswell. The energy is strong (2693). The afternoon session is the standout here, with a cross-offshore breeze from the SE, which should clean it right up. The size is getting into the expert-only zone, so if you’re not comfortable on a 6ft+ reef, sit this one out. The crowds are sometimes, so you might have a few heads out, but that’s standard for this spot.
The rest of the second week, from 21 July onwards, is a grind. The wind is relentless from the SE, and the swell gets mixed up with short-period junk. The energy stays moderate, but the quality is poor. The 26th and 27th bring some fresh, short-period SW swell, but it’s only 8 seconds, so it’s going to be a gutless, choppy mess at the reef. There’s a few days with a 6ft short-period swell, but the wind is just too strong. It’s a write-off for the paddle.
To sum it up: Wednesday 15 July morning is your best bet for a solid, clean session. Monday 20 July afternoon is the big, powerful, and clean option, but that’s for the experts. The rest of the run is a lesson in how cross-shore wind can ruin a good forecast.
Rusty.
Short Range ForecastLight rain (total 3mm), mostly falling on Wed night. Warm (max 26°C on Wed morning, min 24°C on Wed morning). Wind will be generally light. | Days 4-6 Weather SummarySome drizzle, heaviest during Sat night. Warm (max 26°C on Sat morning, min 24°C on Sat morning). Wind will be generally light. | ||||||||||||||||||||
Wednesday 15 | Thursday 16 | Friday 17 | Saturday 18 | Sunday 19 | Monday 20 | Tuesday 21 | |||||||||||||||
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 16 | SW 16 | SSW 16 | SW 15 | SW 15 | SW 15 | SW 18 | SW 16 | SW 16 | SW 15 | SW 15 | SW 14 | SW 14 | SW 13 | SW 19 | SSW 17 | SW 16 | SW 16 | SW 15 | SW 14 | SW 14 |
Wave Graph | |||||||||||||||||||||
1900 | 1611 | 1339 | 1059 | 940 | 844 | 521 | 1115 | 574 | 962 | 844 | 810 | 656 | 628 | 628 | 2611 | 2214 | 2066 | 1446 | 1187 | 811 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross-off | cross-on | cross | cross-off | cross | cross | cross-off | cross | cross | cross-off | cross | cross | cross-off | cross | cross-off | cross-off | cross | cross | cross |
High Tide | 10:25AM3.01m | 11:28PM2.39m | 11:12AM3.06m | 00:07AM2.54m | 11:57AM3.01m | 00:44AM2.65m | 12:39PM2.86m | 1:20AM2.70m | 1:20PM2.65m | 1:56AM2.69m | 2:00PM2.39m | 2:32AM2.62m | 2:41PM2.12m | 3:10AM2.50m | |||||||
Low Tide | 5:13PM-0.01m | 5:04AM0.68m | 5:52PM-0.03m | 5:51AM0.57m | 6:29PM0.03m | 6:36AM0.53m | 7:03PM0.15m | 7:20AM0.56m | 7:35PM0.32m | 8:04AM0.64m | 8:06PM0.52m | 8:49AM0.76m | 8:36PM0.74m | ||||||||
6:20 | — | — | 6:20 | — | — | 6:20 | — | — | 6:20 | — | — | 6:20 | — | — | 6:20 | — | — | 6:20 | — | — | |
— | 5:58 | — | — | 5:58 | — | — | 5:58 | — | — | 5:58 | — | — | 5:58 | — | — | 5:59 | — | — | 5:59 | — | |
mm | — | — | 1 | — | — | 1 | — | — | 1 | — | — | 1 | — | — | — | — | — | — | — | — | — |
Temp °C | 26 | 26 | 25 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 25 | 25 | 26 | 25 | 26 | 26 | 25 |
Feels °C | 29 | 29 | 28 | 29 | 28 | 26 | 27 | 27 | 26 | 28 | 27 | 26 | 26 | 26 | 24 | 25 | 25 | 23 | 25 | 25 | 23 |
Swell 1 Height (m) Direction Period (s) | SSW 16 | SW 16 | SSW 16 | SW 15 | SW 15 | SW 15 | SW 14 | SW 16 | SW 13 | SW 15 | SW 15 | SW 14 | SW 14 | SW 13 | SW 13 | SSW 17 | SW 16 | SW 16 | SW 15 | SW 14 | SW 14 |
1900 | 1611 | 1339 | 1059 | 940 | 844 | 521 | 1115 | 352 | 962 | 844 | 810 | 656 | 628 | 628 | 2611 | 2214 | 2066 | 1446 | 1187 | 811 | |
Swell 2 Height (m) Direction Period (s) | SE 7 | — | — | SE 7 | SSW 21 | SE 7 | SW 18 | — | SE 6 | SSE 6 | — | SE 7 | SSW 23 | SW 21 | SE 6 | — | — | — | — | — | — |
35 | — | — | 67 | 45 | 106 | 449 | — | 75 | 47 | — | 93 | 50 | 115 | 54 | — | — | — | — | — | — | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | SSW 20 | — | — | SW 16 | — | — | — | — | — | SW 19 | — | — | — | — | — | — |
— | — | — | — | — | 149 | — | — | 574 | — | — | — | — | — | 540 | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | SE 7 | SE 6 | SE 7 | SE 7 | SE 6 | SE 7 | SSE 7 | SE 6 | SE 6 | SE 6 | SE 6 | SE 7 | SE 7 | SE 6 | SE 6 | SE 6 | SE 5 | SE 6 | SE 5 | SE 5 | SE 5 |
111 | 51 | 111 | 194 | 156 | 276 | 76 | 109 | 209 | 128 | 122 | 284 | 65 | 99 | 139 | 82 | 33 | 44 | 28 | 45 | 39 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 2 | 116 | 0 | 119 | 119 | 33 | 116 | 2 | 33 | 119 | 262 | 0 | 119 | 118 | 0 | 116 | 118 | 108 | 116 | 265 | 108 |
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.










