Wanjapu Surf Break

Lat Long: 9.65° S 119.02° E

Wanjapu Surf Forecast and Surf Report

Issued: 1 am 16 Aug 2026 (local time)

Forecast update in  hr  min

Today's Wanjapu sea temperature is
26.0° C
0.1° 

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


Wanjapu surf forecast from 15 Aug 2026:

  • Best quality surf: Wednesday 19 Aug, 5AM (local time) - 7ft (2.1m), 19s period, SW swell with cross-offshore winds.
  • Most powerful swell: Thursday 20 Aug, 5AM (local time) - 10ft (3.0m), 17s period, SW swell with 4,438 kJ wave energy.
  • Next surfable swell (1★+): Sunday 16 Aug, 5AM (local time) - 6ft (1.8m), 16s 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 Sunday (Aug 16) at 5AM. The primary swell is predicted to be 1.8m and 16s period with a secondary swell of 0.5m and 5s. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Wanjapu in the next 16 days are 3.0m 17s and forecast to arrive on Thursday (Aug 20) 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 1.7m 6s period and expected on Wednesday (Aug 19) at 8PM.

Wave TypeTime (WITA) & Date Wave Height & Period
Next good surf (1 star+) 5AM (Sun 16th Aug)6ft (1.8m) 16s
Best Surf 5AM (Wed 19th Aug)7ft (2.1m) 19s
Most Powerful 5AM (Thu 20th Aug)10ft (3.0m) 17s

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


The Lowdown

Alright, my friends, let's talk waves. We got a couple weeks of surf on tap, but it's not all going to be pretty. There's a lot of average stuff in between, but a few windows that are going to be straight-up firing.

Right off the bat, it’s a tad slow. The surf on Sunday is a couple feet and lined up, but there's a lot of chop on it and the wind's blowing all wrong. The water temp is about normal, so no worries there.

The first real day to get excited about is Monday morning, the 17th. We've got a 5ft southwest groundswell with a good 14-second period, and the ocean is as flat as a lake – glassy. The energy is moderate (1057), and the waves are going to be holding up clean on the reef. This will be an excellent session for the advanced guys.

Tuesday gets a little smaller, and the wind picks up in the afternoon. But then, hang on to your board, because Wednesday the 19th is the day. The swell jumps to 8ft, pumping in from the southwest with a big 18-second period, and the wind is dead calm again. That's a strong, long-period groundswell, the energy is flowing (3436), and Wanjapu (Big Island) is going to be at its best. This is the one to circle on the calendar.

Thursday the 20th is still solid, with 8ft+ in the morning, but it’s a bit crossed. The afternoon cleans up with a cross-off breeze and 8ft of swell, which is still a great session. The swell backs down a little for Friday and the weekend, but there's still 7ft of clean to semi-clean surf to be had. Just watch those afternoons when the wind picks up.

Into the following week, things settle down. We're looking at 5ft waves with a lot more chop from the cross-shore winds. It's rideable, but you'll be searching for the clean ones.

Now, the long-range look. Around Thursday the 27th, we see a long-period swell starting to show, with a 19-second period. The energy is back up (2485). Then Friday the 28th brings another 8ft pulse of SW groundswell, and the Sunday after that looks clean with 7ft and light winds. It's more than a week out, so take it with a grain of salt, but there's definitely something promising on the horizon.

So, Monday and Wednesday of the first week are your best bets for guaranteed quality. The end of the second week has potential, but it's a wait-and-see. This reef is a beauty when the long-period SSW swells line up, so keep your fingers crossed.

Rusty out.

Short Range Forecast

Mostly dry. Warm (max 27°C on Tue afternoon, min 23°C on Mon night). Wind will be generally light.

Days 4-6 Weather Summary

Mostly dry. Warm (max 27°C on Wed afternoon, min 23°C on Thu night). Wind will be generally light.

Sunday
16
Monday
17
Tuesday
18
Wednesday
19
Thursday
20
Friday
21
Saturday
22
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
3
3
4
4
3
3
3
2
4
5
4
5
4
5
4
3
4
5
3
2
4
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.9
SSW
16
1.8
SSW
16
1.7
SSW
15
1.6
SSW
14
1.5
SSW
14
1.3
SSW
14
1.2
SW
16
1.6
SW
16
2
SW
16
2.3
SW
18
2.5
SW
18
2.5
SW
17
3
SW
17
2.5
SW
16
2.3
SW
16
2.3
SW
15
2.4
SW
17
2.4
SW
17
2.4
SSW
16
2.2
SSW
16
1.9
SW
15
Wave Graph
Metric surfscale
Energy kJ
1811
1629
1174
1057
934
607
786
1239
2033
3415
3913
4284
4133
3545
2687
2325
3307
3259
2856
2503
1730
Wind (km/h)
5
SSW
10
SSE
10
E
5
S
10
SSE
10
ENE
5
SE
15
SSE
10
ESE
0
SSE
5
SE
10
ESE
10
SSE
15
ESE
15
ESE
15
SSE
20
ESE
15
E
10
S
20
SSE
10
ESE
Wind State
cross-on
cross
cross-off
glassy
cross
cross-off
cross
cross-on
cross-off
glassy
cross
cross-off
cross
cross-off
cross-off
cross
cross-off
cross-off
cross-on
cross
cross-off
High Tide
12:21PM2.83m
00:44AM2.93m
12:55PM2.63m
1:13AM2.88m
1:27PM2.39m
1:41AM2.76m
1:58PM2.13m
2:10AM2.58m
2:29PM1.87m
2:41AM2.37m
3:08PM1.61m
3:22AM2.16m
5:09PM1.39m
4:56AM1.98m
Low Tide
6:30PM0.18m
6:55AM0.32m
6:57PM0.33m
7:31AM0.42m
7:22PM0.52m
8:06AM0.57m
7:46PM0.72m
8:43AM0.77m
8:07PM0.93m
9:30AM0.97m
8:25PM1.13m
10:54AM1.14m
8:29PM1.34m
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
clear
clear
clear
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:13
6:13
6:13
6:13
6:11
6:11
6:11
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:01
6:01
6:01
6:01
6:01
6:01
6:01
 mm
Temp °C
26
26
25
26
26
25
26
27
25
26
27
25
26
27
25
26
27
25
25
26
25
Feels °C
29
29
26
29
29
26
28
30
27
29
30
28
27
28
26
26
27
25
26
27
26
  • Map Icons:
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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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