
Surf Forecasts:
Wanjapu surf forecast from 1 Aug 2026:
- Best quality surf: Saturday 8 Aug, 5AM (local time) - 8ft (2.5m), 16s period, SSW swell with cross-offshore winds.
- Most powerful swell: Saturday 8 Aug, 5AM (local time) - 8ft (2.5m), 16s period, SSW swell with 3,870 kJ wave energy.
- Next surfable swell (1★+): Saturday 1 Aug, 11PM (local time) - 4.5ft (1.3m), 18s 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 (Aug 01) at 11PM. The primary swell is predicted to be 1.3m and 18s period with a secondary swell of 1.2m and 15s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Wanjapu in the next 16 days are 2.5m 16s and forecast to arrive on Saturday (Aug 08) at 5AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.8m 7s period and expected on Sunday (Aug 02) at 8PM.
| Wave Type | Time (WITA) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11PM (Sat 1st Aug) | 4.5ft (1.3m) 18s |
| Best Surf | 5AM (Sat 8th Aug) | 8ft (2.5m) 16s |
| Most Powerful | 5AM (Sat 8th Aug) | 8ft (2.5m) 16s |
Table - best surf conditions forecast for Wanjapu over the next 16 days.
The Lowdown
G’day, Rusty here. Let’s break down the next couple of weeks at Wanjapu. It’s a reef break, exposed to the southwest, and it’s consistent—so there’s always something on the cards, but not everything’s worth a paddle.
Starting Saturday afternoon, August 1st, there’s swell—5.2ft from the southwest, period at 16 seconds. Energy is moderate at 1365, but the cross-shore breeze makes it a bit messy. It’s a marginal call, the kind of session you’d only take if you’re keen. Sunday, August 2nd, is similar—6ft, still cross-shore, energy building to 2014 by the afternoon, but quality’s not there yet.
Then Monday morning, August 3rd, is where things start to clean up. Swell drops to 5.6ft from the south-southwest, period at 15 seconds, and the wind turns light cross-offshore. That’s the first real window—clean lines, the reef working proper. It’s still only 5.6ft, so it’s friendly for a lot of blokes, energy moderate at 1242. Good start.
From Monday afternoon through Wednesday, August 5th, we hit a flat patch in quality—swell holds around 5.2ft, but wind keeps swinging cross-on or cross, and energy drops below 1100. These are forgettable, lumpy sessions. Water’s at 78.8°, which is about average for this time of year, so at least the temp’s fine.
Thursday, August 6th, brings a bump—6.9ft to 7.2ft from the south-southwest, period stretching to 18 seconds. That’s proper groundswell. Energy jumps over 2700, so there’s real push. But wind is cross-on in the morning, cross with a chop in the afternoon. It’s surfable, just not pristine.
Friday, August 7th, pushes into 7.5ft to 8.2ft range, still south-southwest, period 17 seconds. Energy over 3000—strong. Morning has light cross-on wind, afternoon turns choppier with a 20 km/h cross breeze. This is advanced territory. Not for beginners, that’s for sure.
Saturday, August 8th, holds 8.2ft, period 16 seconds, energy around 3300. Wind is lighter—cross-shore but only 10 to 15 km/h—so it’s a bit cleaner. This is shaping as one of the better days of the first week. Still big and powerful, but more manageable. If you’re experienced, worth a look.
Sunday, August 9th, eases—6.9ft in the morning, 6.6ft by afternoon, period dropping to 15 seconds. Energy moderate around 2000. Wind cross-shore, light, not perfect, but doable.
Monday, August 10th, has a weird morning—wind from the west-southwest, offshore, which is good, but swell is 6.2ft at 14 seconds, energy only moderate. By afternoon, wind swings cross-on, and it gets choppy. Quality drops off.
Tuesday, August 11th, is where it gets serious. Morning has 8.2ft of south-southwest swell at 17 seconds, energy jumping over 4100—strong. But wind is cross-on, and by afternoon it’s 25 km/h with full chop. This is poor surf, a mess. If you’re a kite surfer, this setup might be more interesting.
Wednesday, August 12th, pulls back—6.6ft, 15 seconds, energy under 2000. Wind cross-on in the morning, cross in the afternoon. Workable, but nothing special.
Thursday, August 13th, drops further—5.6ft, 13-second period, energy around 1800. Wind light cross-on morning, cross afternoon. It’s mediocre, small, a little disorganized.
Friday, August 14th, rebuilds slightly—6.2ft, 15 seconds, energy up over 2200. Wind stays light and cross-shore, so it’s cleaner. Not big, but period is better. A decent, mellow session.
Now, the standout: Saturday, August 15th. We’re looking at 9.8ft of south
Short Range ForecastMostly dry. Warm (max 26°C on Sun morning, min 23°C on Sat night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 26°C on Wed afternoon, min 23°C on Tue night). Wind will be generally light. | ||||||||||||||||||
Sunday 2 | Monday 3 | Tuesday 4 | Wednesday 5 | Thursday 6 | Friday 7 | ||||||||||||||
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 18 | SW 16 | SSW 16 | SSW 16 | SSW 15 | SW 15 | SW 15 | SW 14 | SW 14 | SW 16 | SW 14 | SW 15 | SW 19 | SSW 18 | SW 17 | SW 16 | SSW 17 | SW 16 | SSW 16 |
Wave Graph | |||||||||||||||||||
1663 | 1652 | 1855 | 1765 | 1206 | 1045 | 1059 | 1031 | 1002 | 525 | 1016 | 966 | 2501 | 2672 | 2652 | 2146 | 3354 | 3400 | 3630 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross | cross-off | cross | cross | cross-off | cross-on | cross | cross | cross-on | cross | cross-off | cross-on | cross | cross-off | cross-on | cross | cross-off |
High Tide | 00:27AM2.61m | 12:18PM2.74m | 00:51AM2.69m | 12:49PM2.63m | 1:17AM2.72m | 1:21PM2.47m | 1:46AM2.72m | 1:56PM2.25m | 2:18AM2.67m | 2:38PM2.00m | 2:59AM2.58m | 3:35PM1.72m | 3:56AM2.45m | ||||||
Low Tide | 6:20AM0.60m | 6:38PM0.23m | 6:53AM0.56m | 7:03PM0.33m | 7:28AM0.56m | 7:29PM0.46m | 8:07AM0.60m | 7:56PM0.62m | 8:52AM0.69m | 8:26PM0.81m | 9:51AM0.81m | 9:01PM1.02m | |||||||
— | 6:18 | — | — | 6:18 | — | — | 6:18 | — | — | 6:18 | — | — | 6:18 | — | — | 6:16 | — | — | |
6:00 | — | 6:00 | — | — | 6:00 | — | — | 6:00 | — | — | 6:00 | — | — | 6:00 | — | — | 6:00 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 24 | 26 | 26 | 25 | 26 | 26 | 25 | 25 | 25 | 25 | 25 | 26 | 25 | 25 | 26 | 25 | 25 | 25 | 25 |
Feels °C | 26 | 28 | 29 | 27 | 28 | 29 | 29 | 27 | 27 | 28 | 27 | 28 | 26 | 26 | 26 | 25 | 27 | 27 | 26 |
Swell 1 Height (m) Direction Period (s) | SSW 18 | SW 16 | SSW 16 | SSW 16 | SSW 15 | SW 15 | SW 15 | SW 14 | SW 14 | SW 13 | SW 14 | SW 15 | SW 19 | SSW 18 | SW 17 | SW 16 | SSW 17 | SW 16 | SSW 16 |
1663 | 1652 | 1855 | 1765 | 1206 | 1045 | 1059 | 1031 | 1002 | 525 | 1016 | 966 | 2501 | 2672 | 2652 | 2146 | 3354 | 3400 | 3630 | |
Swell 2 Height (m) Direction Period (s) | SE 6 | SE 7 | SE 7 | SE 6 | SE 7 | — | SE 6 | SSE 6 | SSE 6 | SW 16 | SW 22 | SW 21 | SE 5 | SE 6 | — | — | — | — | SE 5 |
23 | 30 | 37 | 39 | 36 | — | 35 | 26 | 26 | 521 | 120 | 358 | 30 | 43 | — | — | — | — | 29 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | SE 6 | SW 22 | — | — | — | — | — | — | — | — |
— | — | — | — | — | — | — | — | — | 32 | 120 | — | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | — | — | SE 7 | — | SE 7 | SE 7 | SE 6 | — | SE 6 | SE 6 | SSE 6 | SE 5 | SE 5 | — | SE 5 | SE 5 | SE 6 | SE 5 | SE 5 |
— | — | 183 | — | 118 | 44 | 92 | — | 83 | 83 | 20 | 60 | 74 | — | 37 | 28 | 44 | 49 | 55 | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 0 | 0 | 116 | 0 | 2 | 108 | 0 | 2 | 116 | 20 | 116 | 118 | 0 | 119 | 118 | 0 | 2 | 262 | 2 |
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.











