Asu surfForecast / Nias / Indonesia

information circle48hr Weather and Surf, issued 12 am Wednesday 20 May 2026 WIB
Forecast update in hr  min  s Forecast update imminent
Asu surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Asu sea temperature is
30.3° C
(Which is slightly warmer than usual)

How big are the waves at Asu today?

The current surf forecast for Asu at 8AM is: 1.0m 16s primary swell from a Southwest direction and 1.1m 12s secondary swell from a South direction (forecast issued at 12:00am May 20). The wind direction is predicted to be cross-onshore.

Time (WIB) & DateWave HeightWave Period
Morning (20 May)3.5ft (1.1m)16s
Afternoon (20 May)3.5ft (1.1m)16s
Evening (20 May)4ft (1.2m)15s

Table - waves today at Asu. (Swell directed towards the surf break)


Updates in  hr  min  s Forecast update imminent

Short Range Forecast

Heavy rain (total 21mm), heaviest during Wed night. Warm (max 29°C on Tue night, min 28°C on Tue night). Wind will be generally light.

Wednesday
20
Thursday
21
Friday
22
1 AM
4 AM
7 AM
10 AM
1 PM
4 PM
7 PM
10 PM
1 AM
4 AM
7 AM
10 AM
1 PM
4 PM
7 PM
10 PM
1 AM
4 AM
7 AM
10 AM
1 PM
4 PM
7 PM
10 PM
Rating
(10 max)
2
1
2
2
1
0
0
1
1
1
1
1
1
0
1
1
1
1
0
0
0
0
0
1
Swell
Height Map
Height MapHeight MapHeight Map
Height MapHeight MapHeight Map
Height MapHeight MapHeight Map
Wave
Height (m)
Direction
Period (s)
1.1
SW
16
1.1
SW
16
0.9
SW
16
1.1
SW
16
1.1
SW
16
1.1
SW
16
1.2
SW
15
1.2
SW
15
1.2
SW
15
1.2
SW
15
1.2
SW
15
1.1
SW
15
1.2
SW
15
1.2
SW
15
1.2
SW
15
1.3
SW
15
1.3
SW
16
1.3
SW
15
1.2
SW
15
1.1
SW
14
1.1
SW
14
1.3
SW
14
1.3
SW
15
1.3
SW
15
Wave Graph
Metric surfscale
Energy kJ
574
574
432
560
546
603
674
657
640
631
631
535
614
614
614
744
773
753
614
528
520
676
685
685
Wind (km/h)
15
NW
15
NW
10
N
10
N
15
NW
20
NW
15
NW
10
NW
15
NW
10
NW
10
NNW
10
N
10
NNW
15
NW
15
NW
15
NW
10
NW
15
NNW
15
NNW
15
NW
20
WNW
20
WNW
20
W
15
WNW
on
on
cross-on
cross-on
on
on
on
on
on
on
on
cross-on
cross-on
on
on
on
on
on
cross-on
on
on
cross-on
cross-on
cross-on
High Tide
8:16AM0.85m
8:41PM0.43m
9:08AM0.79m
9:40PM0.41m
10:03AM0.72m
Low Tide
1:16AM0.01m
3:06PM0.06m
2:01AM0.06m
4:04PM0.10m
2:52AM0.13m
5:08PM0.14m
thunderstorm
thunderstorm
part cloud
thunderstorm
clear
part cloud
part cloud
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
clear
part cloud
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
clear
thunderstorm
thunderstorm
thunderstorm
thunderstorm
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:22
6:22
6:22
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:31
6:31
6:31
1
1
1
1
2
1
2
1
1
1
2
2
1
2
1
1
2
Temp °C
29
29
28
28
29
29
29
29
28
28
28
28
28
29
29
28
28
28
28
28
28
28
28
28
32
32
32
32
32
31
31
32
31
31
31
32
31
31
32
31
31
31
30
30
30
29
30
31
Swell 1
Height (m)
Direction
Period (s)
1.1
S
13
1.1
S
13
1.1
S
12
1.1
S
12
1.1
SW
16
1.1
SW
16
1.2
SW
15
1.2
SW
15
1.2
SW
15
1.2
SW
15
1.2
SW
15
1.1
SW
15
1.2
SW
15
1.2
SW
15
1.2
SW
15
1.3
SW
15
1.3
SW
16
1.3
SW
15
1.2
SW
15
1.1
SW
14
1.1
SW
14
1.3
SW
14
1.3
SW
15
1.3
SW
15
Energy kJ
398
383
347
336
546
603
674
657
640
631
631
535
614
614
614
744
773
753
614
528
520
676
685
685
Swell 2
Height (m)
Direction
Period (s)
1.1
SW
16
1.1
SW
16
0.9
SW
16
1.1
SW
16
0.8
S
12
0.7
S
12
0.7
S
12
1
S
12
0.9
S
12
0.9
S
12
0.9
S
11
0.9
S
11
0.8
S
11
0.8
S
11
0.8
S
11
0.8
S
11
0.6
S
9
0.7
S
10
0.6
WNW
8
0.7
WNW
8
0.8
WNW
8
0.9
WNW
8
0.9
WNW
8
0.9
WNW
8
Energy kJ
574
574
432
560
180
139
136
273
217
214
196
185
144
144
144
141
61
87
44
58
79
107
109
112
Swell 3
Height (m)
Direction
Period (s)
0.5
W
7
0.5
W
7
0.5
W
7
0.5
W
7
0.7
S
9
0.7
S
9
0.7
S
9
0.4
WNW
7
0.4
WNW
7
0.4
WNW
7
0.4
WNW
7
0.6
SW
17
0.4
WNW
7
0.4
WNW
7
0.5
WNW
7
0.5
WNW
7
0.5
WNW
7
0.6
WNW
7
0.7
S
10
0.6
S
10
0.6
S
10
0.6
S
9
0.6
S
9
0.5
S
9
Energy kJ
28
28
28
27
80
79
78
15
15
15
15
232
15
15
25
26
26
42
89
65
64
61
58
41
Wind waves
Height (m)
Direction
Period (s)
Energy kJ
Nearest Offshore or Glassy
Rating
(10 max)
4
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
2
2
3
Distance (km)
15
15
15
15
15
64
64
15
15
15
15
15
15
64
15
15
15
15
15
15
64
76
64
15
Best forecast wave conditions in Nias
Rating
(10 max)
4
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
2
2
3
Best forecast wave conditions in Indonesia
Rating
(10 max)
4
4
4
4
4
4
4
4
3
3
4
4
3
3
4
4
4
4
3
3
4
4
4
4
Header Global
Rating
(10 max)
4
4
5
5
5
4
4
4
5
5
4
4
5
5
4
4
4
4
5
5
5
7
8
7
  • 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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