Asu Surf Break

Lat Long: 0.92° N 97.25° E

Asu Surf Forecast and Surf Report

Issued: 12 am 18 Aug 2026 (local time)

Forecast update in  hr  min

Today's Asu sea temperature is
30.0° C
0.8° 

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


Asu surf forecast from 17 Aug 2026:

  • Best quality surf: Wednesday 19 Aug, 10PM (local time) - 10ft (3.0m), 17s period, SSW swell with cross-offshore winds.
  • Most powerful swell: Wednesday 19 Aug, 10PM (local time) - 10ft (3.0m), 17s period, SSW swell with 5,177 kJ wave energy.
  • Next surfable swell (1★+): Tuesday 18 Aug, 7AM (local time) - 4.5ft (1.3m), 18s period with SSW swell.

Best Forecast Surf Conditions for Asu this week:

The surf forecast for Asu over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Aug 18) at 7AM. The primary swell is predicted to be 1.3m and 18s period with a secondary swell of 1.1m and 13s. The wind is predicted to be offshore as the swell arrives.

The most powerful waves expected at Asu in the next 16 days are 3.0m 17s and forecast to arrive on Wednesday (Aug 19) at 10PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 6s period and expected on Sunday (Aug 23) at 1PM.

Wave TypeTime (WIB) & Date Wave Height & Period
Next good surf (1 star+) 7AM (Tue 18th Aug)4.5ft (1.3m) 18s
Best Surf10PM (Wed 19th Aug)10ft (3.0m) 17s
Most Powerful10PM (Wed 19th Aug)10ft (3.0m) 17s

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


Short Range Forecast

Moderate rain (total 18mm), heaviest on Tue night. Warm (max 28°C on Mon night, min 27°C on Tue night). Wind will be generally light.

Days 4-6 Weather Summary

Light rain (total 9mm), mostly falling on Thu night. Warm (max 28°C on Thu night, min 27°C on Thu night). Wind will be generally light.

Tuesday
18
Wednesday
19
Thursday
20
Friday
21
Saturday
22
Sunday
23
Monday
24
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
4
4
5
5
5
6
5
5
4
4
4
5
4
4
3
3
3
4
4
4
4
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.6
SSW
17
1.5
SW
19
2.1
SSW
17
2.5
SSW
18
3
SSW
18
3
SSW
17
2.5
SSW
16
2.5
SSW
16
2.3
SSW
16
2.2
SSW
15
2.1
SSW
15
2.3
SSW
17
2.3
SSW
16
2.2
SSW
15
2.1
SSW
14
1.8
SSW
14
1.8
SSW
14
1.6
SSW
13
1.2
SSW
18
1.2
SSW
16
1.8
SSW
16
Wave Graph
Metric surfscale
Energy kJ
1438
1626
2403
4148
5043
5058
3929
3421
2583
2325
1972
3102
2588
2158
1752
1355
1179
919
887
779
1697
Wind (km/h)
10
SSE
10
SW
10
S
0
W
10
WSW
5
S
15
SE
15
SSE
10
SSE
10
ESE
5
SE
10
SE
10
SE
15
S
20
SSE
20
SSE
20
S
10
S
15
SE
15
S
15
SSE
Wind State
off
cross-off
cross-off
glassy
cross-on
cross-off
off
cross-off
off
off
glassy
off
off
cross-off
cross-off
cross-off
cross-off
cross-off
off
cross-off
cross-off
High Tide
9:04AM0.58m
9:49PM0.65m
9:29AM0.49m
10:31PM0.60m
9:51AM0.40m
11:27PM0.55m
10:00AM0.33m
00:57AM0.52m
12:03PM0.27m
2:43AM0.53m
3:37PM0.29m
3:52AM0.58m
4:33PM0.34m
Low Tide
3:03PM0.07m
3:50AM0.21m
3:28PM0.10m
4:40AM0.26m
3:54PM0.14m
6:09AM0.30m
4:29PM0.18m
11:38AM0.27m
5:37PM0.22m
11:05AM0.22m
8:06PM0.23m
11:18AM0.18m
9:34PM0.19m
thunderstorm
thunderstorm
thunderstorm
thunderstorm
part cloud
rain showers
part cloud
part cloud
thunderstorm
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
clear
clear
clear
clear
thunderstorm
thunderstorm
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:30
6:30
6:30
6:30
6:28
6:28
6:28
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:38
6:38
6:37
6:37
6:37
6:37
6:37
 mm
2
1
5
2
5
9
1
9
Temp °C
28
28
28
28
28
28
27
28
28
27
28
28
28
28
28
28
28
28
28
28
27
Feels °C
32
31
31
33
31
31
29
31
32
30
32
32
31
30
30
29
29
30
31
30
29
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
Map placeholder
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Information about the Asu Surf forecast

The above surf forecast table for Asu provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Asu can be found by selecting the local surf guide option on the grey menu. Our Asu 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 (Asu) 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 Asu 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.

Are you planning a holiday in Nias? If you are looking for accommodation near Asu, camping, hotels and holiday cottages in Nias, consider staying in Afia which is 60 km (37 miles) away.

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