Bankvaults surfForecast / Mentawi Islands / Indonesia

information circle12 Day Weather and Surf, issued 6 pm Thursday 18 Dec 2025 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
29.1° C
(Which is normal for this time of year)


Best Forecast Surf Conditions for Bankvaults this week:

The surf forecast for Bankvaults over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Friday (Dec 19) at 1AM. The primary swell is predicted to be 1.0m and 13s period with a secondary swell of 0.7m and 7s. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Bankvaults in the next 12 days are 1.0m 13s and forecast to arrive on Friday (Dec 19) at 1AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.3m 3s period and expected on Monday (Dec 22) at 7PM.

Wave TypeTime (WIB) & Date Wave Height & Period
Next good surf (1 star+) 1AM (Fri 19th Dec)3.5ft (1.0m) 13s
Best Surf 1AM (Fri 19th Dec)3.5ft (1.0m) 13s
Most Powerful 1AM (Fri 19th Dec)3.5ft (1.0m) 13s

Table - best surf conditions forecast for Bankvaults over the next 12 days.

Updates in  hr  min  s Forecast update imminent

Short Range Forecast Moderate rain (total 18mm), heaviest on Thu night. Warm (max 28°C on Thu afternoon, min 25°C on Fri night). Wind will be generally light.

Days 3-6 Weather Summary Moderate rain (total 10mm), heaviest on Tue night. Warm (max 28°C on Sun afternoon, min 25°C on Mon night). Wind will be generally light.

Thu
18
Friday
19
Saturday
20
Sunday
21
Monday
22
Tuesday
23
Wednesday
24
PMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAM
Rating
(10 max)
3
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
1
2
2
2
Swell
Height Map
Wave Height (m) & direction (?)
1.2
SW
1
SW
0.9
SSW
1
SW
0.8
SSW
1
SSW
1
SSW
0.6
SW
0.6
SW
0.7
SW
0.7
SW
0.9
SW
0.7
SW
0.8
SW
0.8
SW
0.8
SW
0.7
SW
0.9
S
0.8
SW
0.7
SW
0.8
SSW
Period(s) (?)141313131211111615151515141413131310141314
Wave
Graph
(?)Metric surfscale
Energy kJ (?)597347295326187243243206183217223309211231215208175154221180236
Wind
(km/h)
10
W
10
WNW
10
NW
10
W
10
WNW
10
NNW
5
WNW
10
NW
5
N
5
WSW
10
W
10
N
5
NNW
10
WNW
10
NNW
5
NW
15
NW
15
WNW
10
W
10
NW
15
NNW
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
off
cross-
off
offcross-
off
cross-
off
offcross-
off
offoffcross-
off
cross-
off
offoffcross-
off
offoffcross-
off
cross-
off
cross-
off
offoff
High Tide
/ height (m)
5:31PM
1.09
5:59AM
0.66
6:07PM
1.12
6:36AM
0.68
6:43PM
1.15
7:11AM
0.69
7:17PM
1.16
7:45AM
0.70
7:49PM
1.16
8:19AM
0.72
8:20PM
1.14
8:55AM
0.74
8:51PM
1.11
9:34AM
0.77
Low Tide
/ height (m)
12:07AM
0.17
11:05AM
0.18
12:39AM
0.13
11:45AM
0.15
1:11AM
0.10
12:23PM
0.13
1:44AM
0.09
1:01PM
0.14
2:18AM
0.09
1:39PM
0.16
2:52AM
0.10
2:19PM
0.20
3:27AM
0.11
Thu
18
Friday
19
Saturday
20
Sunday
21
Monday
22
Tuesday
23
Wednesday
24
Sunrise--6:11--6:13--6:13--6:13--6:13--6:15--6:15
Sunset6:25--6:25--6:27--6:27--6:28--6:28--6:29--
thunderstorm
thunderstorm
thunderstorm
thunderstorm
part cloud
thunderstorm
thunderstorm
clear
clear
part cloud
clear
part cloud
thunderstorm
part cloud
clear
thunderstorm
rain showers
thunderstorm
thunderstorm
thunderstorm
light rain
Rain (mm)
2923-11-----1--144763
Temp. °C282728282628282728282728282728282728272727
Feels °C (?)313031312932313132323031323031313030303029
  • 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 12 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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