Bankvaults surfForecast / Mentawi Islands / Indonesia

information circle16 Day Weather and Surf, issued 6 pm Friday 15 May 2026 WIB
Forecast update in hr  min  s Forecast update imminent
Bankvaults surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Bankvaults sea temperature is
30.3° C
(Which is slightly warmer than usual)

Best Forecast Surf Conditions for Bankvaults this week:

The surf forecast for Bankvaults over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Saturday (May 16) at 1AM. The primary swell is predicted to be 1.5m and 14s period with a secondary swell of 0.7m and 9s. The wind is predicted to be offshore as the swell arrives.

The most powerful waves expected at Bankvaults in the next 16 days are 1.5m 15s and forecast to arrive on Monday (May 18) at 1PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.0m 4s period and expected on Saturday (May 16) at 4AM.

Wave TypeTime (WIB) & Date Wave Height & Period
Next good surf (1 star+) 1AM (Sat 16th May)5ft (1.5m) 14s
Best Surf 4AM (Mon 18th May)4.5ft (1.3m) 16s
Most Powerful 1PM (Mon 18th May)5ft (1.5m) 15s

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


Updates in  hr  min  s Forecast update imminent

Short Range Forecast

Heavy rain (total 44mm), heaviest during Fri afternoon. Warm (max 30°C on Mon morning, min 26°C on Fri night). Wind will be generally light.

Days 5-7 Weather Summary

Heavy rain (total 53mm), heaviest during Tue night. Warm (max 29°C on Mon afternoon, min 26°C on Wed night). Wind will be generally light.

Fri
15
Saturday
16
Sunday
17
Monday
18
Tuesday
19
Wednesday
20
Thursday
21
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
Rating
(10 max)
4
3
3
2
2
2
3
3
3
3
4
4
2
3
3
3
3
3
3
3
3
Swell
Height Map
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
14
1.5
SSW
14
1.4
SSW
13
1.3
SSW
13
1.3
SSW
13
1.1
SSW
13
1
SSW
13
0.8
S
16
1.2
S
15
1.5
S
15
1.4
S
14
1.4
S
13
1.3
S
13
1
SW
16
1
SW
16
1.1
SW
16
1.1
SW
15
1.1
SW
15
1.1
SW
15
1.2
SW
16
1
SW
14
Wave Graph
Metric surfscale
Energy kJ
1047
879
722
538
543
396
372
333
640
984
768
663
555
504
492
619
557
550
557
683
398
Wind (km/h)
15
NNW
25
NNW
20
NW
20
NW
15
NW
10
NW
10
N
10
NNW
10
N
15
N
10
NNW
20
NNW
20
NW
15
NW
20
N
20
NW
15
WNW
10
NNW
5
NNW
5
NNW
5
N
off
off
off
cross-off
cross-off
cross-off
cross-off
off
cross-off
cross-off
off
off
cross-off
off
off
off
cross-off
off
off
glassy
cross-off
High Tide
5:07PM0.86m
5:31AM1.27m
5:54PM0.85m
6:14AM1.35m
6:39PM0.83m
6:58AM1.38m
7:26PM0.80m
7:44AM1.36m
8:14PM0.77m
8:33AM1.30m
9:07PM0.74m
9:25AM1.22m
10:07PM0.71m
10:22AM1.11m
Low Tide
10:47PM0.06m
11:58AM0.03m
11:30PM0.02m
12:46PM-0.02m
00:13AM-0.01m
1:33PM-0.04m
00:57AM-0.01m
2:21PM-0.01m
1:42AM0.03m
3:10PM0.04m
2:30AM0.10m
4:02PM0.11m
3:24AM0.19m
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
mod rain
part cloud
part cloud
part cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:18
6:18
6:18
6:18
6:18
6:18
6:18
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:20
6:20
6:20
6:20
6:20
6:20
6:20
6:20
14
4
5
1
4
3
8
4
1
6
8
7
4
15
4
3
6
Temp °C
27
27
29
29
27
28
28
27
30
29
27
29
29
27
29
29
27
29
29
28
29
29
28
30
30
28
32
32
32
32
31
30
30
30
29
31
30
29
33
33
33
33
Swell 1
Height (m)
Direction
Period (s)
1.6
SSW
14
1.5
SSW
14
1.4
SSW
13
1.3
SSW
13
1.3
SSW
13
1.1
SSW
13
1
SSW
13
0.9
SSW
13
1.2
S
15
1.5
S
15
1.4
S
14
1.4
S
13
1.3
S
13
1.2
S
12
1.1
S
12
1.1
SW
16
1.1
SW
15
1.1
SW
15
1.1
SW
15
1.2
SW
16
1
SW
14
Energy kJ
1047
879
722
538
543
396
372
282
640
984
768
663
555
413
336
619
557
550
557
683
398
Swell 2
Height (m)
Direction
Period (s)
0.4
SE
8
0.7
W
9
0.2
SSE
7
1.2
W
9
0.8
W
9
0.7
W
9
0.8
W
9
0.8
S
16
0.6
W
9
0.6
W
8
0.8
SW
18
0.7
SW
17
0.8
SW
16
1
SW
16
1
SW
16
1
S
12
1
S
11
0.7
S
9
0.9
S
9
0.8
S
10
0.7
S
9
Energy kJ
15
73
5
220
96
74
101
333
55
51
375
297
366
504
492
273
224
78
140
116
81
Swell 3
Height (m)
Direction
Period (s)
0.2
SSE
8
0.2
SSE
7
0.1
W
15
0.6
SW
16
0.2
SSE
6
0.5
W
5
0.4
SW
15
0.7
W
9
0.6
S
10
0.6
SW
19
0.6
WNW
8
0.6
W
8
0.5
W
8
0.6
WNW
8
0.4
WNW
8
0.1
W
10
0.4
WNW
7
0.6
S
11
0.3
WNW
7
0.3
WNW
7
0.7
SSW
17
Energy kJ
6
5
4
157
4
12
75
78
66
236
53
49
33
47
22
2
20
82
9
9
258
Wind waves
Height (m)
Direction
Period (s)
0.8
WNW
8
0.9
N
6
1.2
WNW
9
0.5
N
4
0.7
W
5
0.2
N
3
0.5
N
4
0.4
NNW
4
0.3
NNW
3
0.5
NW
7
0.4
NNW
4
0.4
NW
7
Energy kJ
92
50
216
9
28
1
9
7
2
27
5
16
Nearest Offshore or Glassy
Rating
(10 max)
4
3
3
3
3
2
3
3
3
3
4
4
3
3
3
3
3
3
3
3
3
Distance (km)
0
0
0
90
90
0
0
0
0
10
0
0
92
0
0
0
0
0
0
0
0
Best forecast wave conditions in Mentawi Islands
Rating
(10 max)
4
4
3
3
3
3
3
3
3
4
4
4
3
3
3
3
3
3
3
3
3
Best forecast wave conditions in Indonesia
Rating
(10 max)
4
4
3
3
3
4
4
4
4
4
4
4
3
3
4
3
3
3
3
3
3
Header Global
Rating
(10 max)
6
5
4
6
4
5
7
4
6
4
4
4
4
4
4
6
5
4
7
5
5
  • Map Icons:
  • Break
  • 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 Bankvaults Surf forecast

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

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