Wanjapu Surf Break

Lat Long: 9.65° S 119.02° E

Wanjapu Surf Forecast and Surf Report

Issued: 1 pm 31 Aug 2026 (local time)

Forecast update in  hr  min

Today's Wanjapu sea temperature is
26.4°C
0.0° 

Wanjapu surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


Wanjapu surf forecast from 31 Aug 2026:

  • Best quality surf: Wednesday 2 Sep, 5AM (local time) - 7.5ft (2.3m), 17s period, SW swell with cross-offshore winds.
  • Most powerful swell: Tuesday 1 Sep, 11AM (local time) - 7.5ft (2.3m), 18s period, SW swell with 3,219 kJ wave energy.
  • Next surfable swell (1★+): Monday 31 Aug, 11PM (local time) - 6ft (1.9m), 18s 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 Monday (Aug 31) at 11PM. The primary swell is predicted to be 1.9m and 18s period with a secondary swell of 0.9m and 11s. Another secondary swell of 0.9m 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 2.3m 18s and forecast to arrive on Tuesday (Sep 01) 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 1.1m 5s period and expected on Wednesday (Sep 02) at 2AM.

Wave TypeTime (WITA) & Date Wave Height & Period
Next good surf (1 star+)11PM (Mon 31st Aug)6ft (1.9m) 18s
Best Surf 5AM (Wed 2nd Sep)7.5ft (2.3m) 17s
Most Powerful11AM (Tue 1st Sep)7.5ft (2.3m) 18s

Table - best surf conditions forecast for Wanjapu over the next 16 days.


The Lowdown

G’day, Rusty here. Alright, listen up, we’ve got a solid run of swell on the horizon for Wanjapu, but it’s a bit of a mixed bag with the wind. The standout window is the first morning, Monday the 31st of August, with the rest of the week a bit of a gamble until conditions clean up again later.

The surf kicks off with a beauty on Monday morning. We’re looking at a 4ft SW groundswell, and the period is a very long 19 seconds. That’s proper energy, with a combined swell energy reading of 1393 (moderate), and the water temp is a comfortable 79°, which is about average for the time of year. The wind is glassy from the SSW at 3 mph. That’s dead clean, perfect for the advanced crew that this reef break demands. It’s a consistent spot, too, so expect sets to roll through. Just be aware, crowds are sometimes an issue here.

By Monday afternoon, the wind swings to a cross-shore 9 mph from the SSE, and the swell bumps up to 5ft. The glass is gone, and it becomes marginal. The rest of the week is a bit of a grind. Tuesday the 1st of September shows a 7ft SW swell (18-second period) with a cross-onshore wind, making it choppy. Tuesday afternoon cleans up a bit with a cross-offshore breeze, but the quality is still just okay. Wednesday the 2nd and Thursday the 3rd are similar stories: plenty of swell (8ft and 6ft) but the wind is never quite right, leaving a light chop on the surface.

You hit a bit of a lull from Friday the 4th through the weekend, with smaller swell dropping to 5ft and periods shortening to 14 seconds. The energy drops (combined energy down to 825 on Friday arvo), and the wind stays messy. Not worth getting excited about.

Now, things start looking up again on Tuesday the 9th of September. Wednesday morning the 9th has a 8ft SSW swell with a 16-second period, and while the wind is onshore, the energy is building (combined energy 3744). The real turn comes Wednesday afternoon: the wind shifts to a cross-offshore breeze from the SE at 9 mph, and you’ve got a 8ft SSW swell running. That’s clean, powerful surf. The combined energy is 3404 (strong). This is the second standout of the forecast.

Thursday the 10th of September also has decent potential in the afternoon with a clean cross-offshore wind again, with a 7ft SSW swell. After that, the second week settles into a pattern of consistent 5ft to 8ft SW swells, but mostly with cross or cross-onshore winds, so it’ll be a matter of picking the morning windows when the breeze is lighter. The best of the later week is probably Tuesday the 15th of September morning, with a 7ft SW swell (16-second period) and light cross-onshore winds, but it’s a long way out. For now, lock in that Monday morning glass-off and the Wednesday the 9th arvo session.

Rusty.

Short Range Forecast

Mostly dry. Warm (max 26°C on Mon afternoon, min 23°C on Mon night). Wind will be generally light.

Days 5-7 Weather Summary

Light rain (total 2mm), mostly falling on Fri night. Warm (max 26°C on Thu afternoon, min 23°C on Thu night). Wind will be generally light.

Mon
31
Tuesday
1
Wednesday
2
Thursday
3
Friday
4
Saturday
5
Sunday
6
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
2
4
3
4
4
3
2
3
3
2
3
1
0
3
3
2
2
2
3
2
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.5
SW
18
1.9
SW
18
2.3
SW
18
2.2
SW
17
2.2
SW
17
2.3
SW
17
2.1
SW
16
1.9
SW
16
1.9
SW
16
1.6
SW
16
1.5
SW
15
1.5
SW
14
1.4
SW
14
1.2
SW
13
1.8
SW
14
2
SSW
16
1.9
SSW
14
1.9
SSW
14
2.3
SSW
17
2.3
SSW
16
Wave Graph
Metric surfscale
Energy kJ
1367
2318
3219
2846
2726
2913
2384
1809
1694
1265
924
915
799
488
1179
1832
1447
1463
3022
2550
Wind (km/h)
15
SSE
15
ESE
15
SSE
15
ESE
15
ESE
10
S
20
SSE
20
SE
10
SSE
25
SE
10
ESE
15
S
25
SE
15
ESE
10
SSW
20
SSE
20
SE
20
SE
15
SE
20
SE
Wind State
cross-on
cross-off
cross
cross-off
cross-off
cross-on
cross
cross-off
cross-on
cross
cross-off
cross-on
cross
cross-off
cross-on
cross
cross
cross
cross
cross
High Tide
00:13AM2.96m
12:28PM2.65m
00:39AM2.97m
12:59PM2.46m
1:08AM2.92m
1:33PM2.22m
1:40AM2.79m
2:11PM1.94m
2:20AM2.60m
3:06PM1.65m
3:17AM2.37m
5:44PM1.46m
Low Tide
6:04PM0.24m
6:30AM0.24m
6:29PM0.34m
7:03AM0.26m
6:54PM0.47m
7:40AM0.37m
7:21PM0.65m
8:23AM0.55m
7:48PM0.86m
9:21AM0.78m
8:20PM1.10m
11:03AM0.97m
9:18PM1.37m
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
rain showers
clear
part cloud
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:05
6:05
6:05
6:05
6:03
6:03
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:00
6:00
6:00
6:00
6:00
6:00
6:00
 mm
2
Temp °C
26
25
26
26
25
25
26
25
26
26
25
25
26
25
25
26
25
26
26
25
Feels °C
28
26
27
26
26
27
27
26
28
26
26
25
25
25
27
28
26
26
27
27
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  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
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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.

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