
Surf Forecasts:
Wanjapu surf forecast from 19 Jul 2026:
- Best quality surf: Saturday 25 Jul, 8AM (local time) - 3.5ft (1.0m), 15s period, SSW 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, 8AM (local time) - 3.5ft (1.0m), 15s 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 Saturday (Jul 25) at 8AM. The primary swell is predicted to be 1.0m and 15s period with a secondary swell of 0.7m and 7s. 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-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.4m 7s period and expected on Saturday (Jul 25) at 2AM.
| Wave Type | Time (WITA) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8AM (Sat 25th Jul) | 3.5ft (1.0m) 15s |
| Best Surf | 8AM (Sat 25th Jul) | 3.5ft (1.0m) 15s |
| 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
Righto, grab a coffee and settle in, because I’ve been staring at the charts for Wanjapu and it’s a bit of a mixed bag. Let’s break it down.
The overall pattern for the next couple of weeks is one of persistent, moderate cross-shore winds and a lot of “marginal” surf. The swell is there, but it’s fighting a cross-chop most of the time, which means it’s going to be lumpy and not the kind of day you’d call your mates about. The water temperature is sitting at a balmy 80° with a 0.9° anomaly, so it’s bang on average for this time of year – no need for a thick wetsuit, just a springy.
The first real chance to get wet comes Sunday, July 19th, but don’t hold your breath. The morning shows a 4ft swell from the southwest, with a period of 14 seconds, but the wind is a cross-shore from the southeast at 9 mph. The combined energy is moderate at 735. It’s a breeze, but it’s that slight cross-shore that’ll put a bit of a ruffle on the face. The afternoon gets worse with the wind ramping up to 19 mph, making it lumpy. Scores are low, so it’s a pass.
Monday, July 20th, the swell picks up to 6ft from the southwest, with a much longer period of 17 seconds – that’s proper groundswell energy, and the combined energy jumps to 2243. The wind is still cross-shore, 9 mph in the morning. This is the best of the first week, but with the cross-shore wind, it’ll be a bit sectiony. This is a day for the experienced surfer who knows the reef – the long period will make it wall up, but at 6ft it’s getting a bit too big for beginners.
Tuesday, July 21st, drops a touch to 6ft from the southwest, period 15 seconds, moderate energy (1417). The wind is still cross-shore at 16 mph. The pattern holds through Wednesday, where the swell drops to 4ft and the energy weakens. The rest of the week into the weekend (July 23rd to 26th) is similar – small, cross-shore, with the occasional bump in size but no real change in the wind. Saturday, July 25th, has a moment in the morning with a 3ft, 15-second period swell and a light breeze at 6 mph, but the wind is still cross-shore, so it’s just a slight improvement.
Now, there’s a gap of a few days where the swell is small and the wind is messy, until we hit the end of the month. The week starting July 28th has a bit more to offer. The morning of July 28th has a 3ft, 16-second period swell from the SW with a light cross-onshore wind – not ideal, but the light wind means it’s not blown out. The energy is moderate at 614.
The real standout, though, is the afternoon of the 29th of July. The swell is 5ft from the southwest, period 14 seconds, and the wind shifts to a cross-offshore from the ESE at 9 mph. The guide says “clean.” That’s the word. The cross-offshore will groom the reef, giving you clean, lined-up waves. The combined energy is 872 – moderate. This is the one to circle on the calendar. It’s not huge, but it’ll be good quality.
The first couple of days of August are promising, but they’re a long way out. August 1st Saturday afternoon sees a 8ft swell from the SW with a 17-second period and a strong energy of 3584. The wind is cross-shore at 16 mph, so it’s a bit lumpy. But the morning of Sunday, August 2nd, is a real looker: 8ft, 16-second period, and a light cross-shore breeze at 6 mph. The combined energy is 3696. For the experts, this is a big, powerful swell. At 8ft, it’s expert-only territory. Monday, August 3rd, the wind drops to nearly nothing, with a 6ft, 14-second period and a combined energy of 3240 – the light cross-onshore will be a manageable ripple. This is a solid run of swell, but week-two forecasts are always a bit more of a gamble.
So, to sum it up: the best on offer is the afternoon of July 29th for the cleanest conditions, and the morning of August 2nd for the biggest, most powerful swell, but it’s only for the brave. The rest of the time, you’ll be battling the cross-shore wind.
Rusty.
Short Range ForecastSome drizzle, heaviest during Sun morning. Warm (max 26°C on Sun morning, min 23°C on Mon night). Mainly fresh winds. | Days 4-6 Weather SummaryMostly dry. Warm (max 26°C on Wed morning, min 23°C on Thu night). Mainly fresh winds. | ||||||||||||||||||||
Sunday 19 | Monday 20 | Tuesday 21 | Wednesday 22 | Thursday 23 | Friday 24 | Saturday 25 | |||||||||||||||
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 14 | SW 13 | SW 13 | SW 17 | SW 16 | SW 16 | SW 15 | SSW 14 | SW 14 | SSW 13 | SW 13 | SSW 13 | SSW 14 | SW 14 | SSW 14 | SSW 13 | SW 13 | SSW 16 | SSW 15 | SSW 14 | SE 8 |
Wave Graph | |||||||||||||||||||||
647 | 628 | 637 | 2191 | 2173 | 1909 | 1358 | 1111 | 811 | 581 | 382 | 458 | 268 | 463 | 425 | 304 | 245 | 227 | 443 | 367 | 345 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross-off | cross | cross | cross | cross | cross | cross | cross | cross | cross-off | cross | cross | cross-off | cross | cross | cross-off | cross | cross-off | cross-off |
High Tide | 1:20PM2.65m | 1:56AM2.69m | 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 | ||||||||
Low Tide | 7:35PM0.32m | 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 | ||||||||
6:20 | — | — | 6:20 | — | — | 6:20 | — | — | 6:20 | — | — | 6:20 | — | — | 6:20 | — | — | 6:20 | — | — | |
— | 5:58 | — | — | 5:59 | — | — | 5:59 | — | — | 5:59 | — | — | 5:59 | — | — | 5:59 | — | — | 6:00 | — | |
mm | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 26 | 26 | 25 | 26 | 26 | 25 | 26 | 26 | 25 | 26 | 25 | 25 | 26 | 26 | 25 | 26 | 26 | 25 | 25 | 26 | 25 |
Feels °C | 26 | 26 | 24 | 26 | 26 | 22 | 24 | 24 | 22 | 23 | 23 | 21 | 23 | 24 | 22 | 25 | 25 | 22 | 25 | 26 | 25 |
Swell 1 Height (m) Direction Period (s) | SW 14 | SW 13 | SW 13 | SW 17 | SW 16 | SW 16 | SW 15 | SSW 14 | SW 14 | SSW 13 | SW 13 | SSW 13 | SSW 12 | SW 14 | SSW 14 | SSW 13 | SW 13 | SSE 7 | SSW 15 | SSW 14 | SSE 8 |
647 | 628 | 637 | 2191 | 2173 | 1909 | 1358 | 1111 | 811 | 581 | 382 | 458 | 174 | 463 | 425 | 304 | 245 | 131 | 443 | 367 | 150 | |
Swell 2 Height (m) Direction Period (s) | SW 22 | SW 21 | SE 6 | — | — | — | — | — | — | SW 18 | SSW 16 | SSW 15 | SSW 14 | SW 18 | SW 18 | SW 18 | SSW 17 | SW 12 | S 8 | S 8 | SSW 14 |
19 | 112 | 73 | — | — | — | — | — | — | 78 | 166 | 152 | 268 | 49 | 12 | 78 | 159 | 227 | 68 | 84 | 243 | |
Swell 3 Height (m) Direction Period (s) | — | — | SSW 19 | — | — | — | — | — | — | — | — | — | — | — | — | WSW 16 | SW 16 | SSW 16 | SE 7 | WSW 17 | SW 16 |
— | — | 475 | — | — | — | — | — | — | — | — | — | — | — | — | 25 | 40 | 226 | 41 | 29 | 67 | |
Wind waves Height (m) Direction Period (s) | SE 6 | SE 6 | SE 6 | SE 6 | SE 6 | SE 6 | SSE 6 | SE 5 | SE 6 | SE 6 | SE 6 | SSE 6 | SSE 6 | SSE 6 | SSE 6 | SSE 6 | SSE 6 | SE 7 | SE 7 | SE 7 | SE 8 |
59 | 151 | 188 | 49 | 64 | 86 | 55 | 79 | 77 | 72 | 118 | 59 | 72 | 127 | 100 | 55 | 209 | 189 | 174 | 160 | 345 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 119 | 262 | 33 | 119 | 118 | 108 | 263 | 265 | 108 | 120 | 262 | 108 | 262 | 265 | 33 | 262 | 118 | 20 | 116 | 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.










