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Surf Forecasts:

Thunders surfForecast / Mentawi Islands / Indonesia

information circle48hr Weather and Surf, issued 12 am Wednesday 21 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
29.2° C
 (Which is normal for this time of year)

How big are the waves at Thunders today?

The current surf forecast for Thunders at 9AM is: 1.2m 20s primary swell from a South-southwest direction and 1.4m 9s secondary swell from a West direction (forecast issued at 12:00am January 21). The wind direction is predicted to be cross-offshore and the swell rating is 4.

Time (WIB) & DateWave HeightWave Period
Morning (21 Jan)4ft (1.2m)20s
Afternoon (21 Jan)4.5ft (1.4m)19s
Evening (21 Jan)5ft (1.6m)18s

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

Updates in  hr  min  s Forecast update imminent 
12 DaysHourly
Print Table
Wednesday
21
Thursday
22
Friday
23
10 PM1 AM4 AM7 AM10 AM1 PM4 PM7 PM10 PM1 AM4 AM7 AM10 AM1 PM4 PM7 PM10 PM1 AM4 AM7 AM10 AM1 PM4 PM7 PM
Rating
(10 max)
4
4
4
4
4
3
3
4
4
3
3
3
3
3
3
2
2
0
4
2
1
1
1
2
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
1.2
SSW
1.2
SSW
1
S
1
S
1.2
SSW
1.4
SSW
1.4
SSW
1.5
S
1.6
SSW
1.6
SSW
1.6
SSW
1.9
SSW
1.9
SSW
1.8
SSW
1.7
SSW
1.7
SSW
1.6
SSW
1.6
SSW
1.5
SSW
1.4
SSW
1.4
SSW
1.4
SSW
1.4
SSW
1.6
SSW
Period(s) (?)141422212019191818171616161515141414141313131414
Wave
Graph
(?)Metric surfscale
Energy kJ (?)56156194391711521513139114371633154113821785176214601174114310021002837673663673714876
Wind
(km/h)
15
NW
10
NNW
10
NNW
15
NNW
15
NW
15
NW
15
NW
15
NW
15
NW
20
WNW
20
NW
15
WNW
20
NW
25
WNW
25
WNW
25
WNW
25
W
20
WSW
15
WNW
15
NW
30
WNW
30
NW
25
NW
20
NW
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
off		offcross-
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		crosscross-
on		cross-
off		cross-
off		cross-
off		cross-
off		cross-
off		cross-
off
High Tide
/ height (m)
7:16PM
1.01
7:51AM
0.67
7:47PM
1.00
8:24AM
0.72
8:18PM
0.97
8:59AM
0.77
Low Tide
/ height (m)
1:56AM
0.05
1:17PM
0.15
2:22AM
0.04
1:57PM
0.16
2:49AM
0.04
2:39PM
0.19
Wednesday
21
Thursday
22
Friday
23
Sunrise---6:22-------6:22-------6:22----
Sunset------6:37-------6:37-------6:37-
cloud
cloud
cloud
thunderstorm
part cloud
cloud
thunderstorm
thunderstorm
thunderstorm
cloud
cloud
part cloud
thunderstorm
thunderstorm
thunderstorm
light rain
mod rain
light rain
cloud
part cloud
part cloud
thunderstorm
thunderstorm
thunderstorm
Rain (mm)
---1--112---3235102---222
Temp. °C272727272728282727272626272726242425252627282726
Feels °C (?)293030292829292929282627282726232426272826272727
  • 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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FREE! Surf-Forecast.com widget for your website

The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Thunders surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.

View detailed surf forecast for Thunders at:
surf-forecast.com

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