Thunders surfForecast / Mentawi Islands / Indonesia

information circle48hr Weather and Surf, issued 6 am Friday 16 Jan 2026 WIB
Forecast update in hr  min  s Forecast update imminent
Thunders surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Thunders sea temperature is
29.5° C
(Which is normal for this time of year)


How big are the waves at Thunders today?

The current surf forecast for Thunders at 11AM is: 0.8m 14s primary swell from a Southwest direction and 0.8m 6s secondary swell from a West direction (forecast issued at 06:00am January 16). An open ocean swell of 0.4m 3s is not directed at the surf break. The wind direction is predicted to be cross-offshore.

Time (WIB) & DateWave HeightWave Period
Morning (16 Jan)2.5ft (0.8m)14s
Afternoon (16 Jan)2.5ft (0.8m)14s
Evening (16 Jan)2.5ft (0.8m)13s

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

Updates in  hr  min  s Forecast update imminent
Friday
16
Saturday
17
Sunday
18
Mon
19
4AM7AM10AM1PM4PM7PM10PM1AM4AM7AM10AM1PM4PM7PM10PM1AM4AM7AM10AM1PM4PM7PM10PM1AM
Rating
(10 max)
1
1
1
1
1
1
2
2
2
1
2
1
1
2
1
3
3
4
2
2
3
2
2
2
Swell
Height Map
Wave Height (m) & direction (?)
0.9
SW
0.8
SW
0.8
SW
0.8
SW
0.8
SW
0.8
SW
0.8
SW
0.8
SW
0.7
SW
0.8
SW
0.7
SW
1
SW
1
SW
1
SW
0.9
SSW
1.1
SW
0.9
SW
1.1
SW
1.1
SW
0.8
SSW
1.4
SW
1.4
SW
1.5
SSW
1.4
SW
Period(s) (?)141414141413131317131616161615151915151817181717
Wave
Graph
(?)Metric surfscale
Energy kJ (?)3362852692572572422462462911992684964834774095035464894894071235124913831207
Wind
(km/h)
15
NW
15
NW
20
NNW
20
WNW
20
NW
20
NW
20
NW
20
NW
20
NW
15
NNW
20
NW
25
NW
25
WNW
25
NW
25
NW
20
NW
15
NNW
15
NW
25
WNW
20
WNW
20
WNW
20
W
20
W
20
W
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
off
cross-
off
cross-
off
cross-
off
cross-
off
cross-
off
cross-
off
cross-
off
cross-
off
cross-
off
cross-
off
cross-
off
cross-
off
cross-
off
cross-
off
cross-
off
cross-
off
cross-
off
cross-
off
cross-
off
cross-
off
crosscrosscross
High Tide
/ height (m)
4:48AM
0.42
4:56PM
0.85
5:34AM
0.46
5:36PM
0.91
6:11AM
0.50
6:12PM
0.95
Low Tide
/ height (m)
9:36AM
0.23
12:07AM
0.16
10:31AM
0.20
12:35AM
0.12
11:17AM
0.17
Friday
16
Saturday
17
Sunday
18
Mon
19
Sunrise-6:20-------6:20-------6:20------
Sunset----6:37-------6:37-------6:37---
thunderstorm
thunderstorm
part cloud
part cloud
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
mod rain
Rain (mm)
41--12234312212122322436
Temp. °C262627282827272726262726252525262526262626262626
Feels °C (?)282728282928282827282826252625272728262727272727
  • 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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