Surf Forecast Surf Report

Thunders surfForecast / Mentawi Islands / Indonesia

information circle12 Day Weather and Surf, issued 6 am Friday 16 May 2025 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
29.9° C
(Which is normal for this time of year)


Best Forecast Surf Conditions for Thunders this week:

The surf forecast for Thunders over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Friday (May 16) at 1PM. The primary swell is predicted to be 1.2m and 15s period with a secondary swell of 0.7m and 10s. The wind is predicted to be offshore as the swell arrives.

The most powerful waves expected at Thunders in the next 12 days are 1.6m 16s and forecast to arrive on Thursday (May 22) at 10AM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 6s period and expected on Friday (May 16) at 1PM.

Wave TypeTime (WIB) & Date Wave Height & Period
Next good surf (1 star+) 1PM (Fri 16th May)4ft (1.2m) 15s
Best Surf 1AM (Thu 22nd May)4.5ft (1.4m) 17s
Most Powerful10AM (Thu 22nd May)5ft (1.6m) 16s

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

Updates in  hr  min  s Forecast update imminent
Friday
16
Saturday
17
Sunday
18
Monday
19
Tuesday
20
Wednesday
21
Thursday
22
Friday
23
Saturday
24
Sunday
25
Monday
26
Tuesday
27
AMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNight
Rating
(10 max)
0
Swell
Height Map
Wave Height (m) & direction (?)
1.1
SW
1.2
SSW
1.2
SSW
0.9
SSW
0.9
SSW
0.8
SSW
1.1
SW
1
SW
0.9
SW
0.7
SW
0.9
SW
0.9
SW
0.8
SW
0.9
SW
0.8
SW
0.9
SW
1.1
SW
1.4
SW
1.6
SW
1.6
SW
1.4
SW
1.3
SSW
1.7
SSW
1.7
SSW
1.6
SSW
1.5
SSW
1.3
SSW
1.3
SSW
1.2
SSW
1.1
SSW
0.9
SSW
0.7
SSW
0.9
SSW
0.8
SSW
0.8
SSW
0.7
S
Period(s) (?)151515141416151414141313131313171717161615181716151514131313131312121219
Wave
Graph
(?)Metric surfscale
Energy (?)5815685683573623305374122722062612952502902024107541048123912249181086156114151067911732634506427238173210161158336
Wind
(km/h)
30
NNW
25
NNW
20
NNW
25
NNW
20
NW
15
NW
15
NNW
20
NW
10
NW
10
NNW
15
WNW
5
WNW
5
N
5
WSW
10
SSE
5
ESE
5
SSW
5
SSE
5
W
10
WSW
5
SW
5
WNW
15
W
5
WSW
10
W
15
W
10
NNW
10
NW
15
WNW
10
NNW
10
NNW
10
W
5
N
5
NNW
10
W
5
NNW
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
offoffcross-
off
cross-
off
cross-
off
cross-
off
offcross-
off
cross-
off
offcross-
off
glassglassglasscross-
on
cross-
on
onglassglasscross-
on
glasscross-
off
cross-
off
glasscrosscrossoffcross-
off
cross-
off
cross-
off
cross-
off
cross-
off
offcross-
off
crossglass
High Tide
/ height (m)
8:16PM
0.51
8:27AM
0.91
8:56PM
0.49
9:05AM
0.88
9:47PM
0.49
9:50AM
0.85
10:56PM
0.50
10:46AM
0.81
12:18AM
0.56
11:53AM
0.77
1:31AM
0.65
1:09PM
0.74
2:31AM
0.76
2:23PM
0.71
3:22AM
0.88
3:29PM
0.68
4:09AM
1.00
4:28PM
0.66
4:55AM
1.08
5:21PM
0.63
5:42AM
1.14
6:12PM
0.61
Low Tide
/ height (m)
2:40PM
0.11
1:34AM
0.15
3:20PM
0.14
2:09AM
0.20
4:06PM
0.17
2:51AM
0.25
4:58PM
0.19
3:50AM
0.31
5:56PM
0.20
5:15AM
0.36
6:54PM
0.19
7:00AM
0.37
7:48PM
0.17
8:34AM
0.31
8:37PM
0.14
9:47AM
0.21
9:23PM
0.11
10:48AM
0.12
10:08PM
0.07
11:42AM
0.04
10:53PM
0.05
12:32PM
-0.01
11:37PM
0.03
Friday
16
Saturday
17
Sunday
18
Monday
19
Tuesday
20
Wednesday
21
Thursday
22
Friday
23
Saturday
24
Sunday
25
Monday
26
Tuesday
27
Sunrise6:16--6:16--6:16--6:16--6:16--6:16--6:16--6:16--6:16--6:16--6:16--6:16--
Sunset-6:14--6:14--6:14--6:14--6:14--6:14--6:14--6:14--6:14--6:14--6:15--6:15-
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Rain (mm)
--1--5--9--3--1-------------------1-
Temp. °C282828292928303028292928292928292827292928292927292827292827292927292827
Feels °C (?)282930303031323231313233333433333231323232313230313030313029313230333131

Short Range Forecast: Moderate rain (total 15mm), heaviest on Sun night. Warm (max 30°C on Sun morning, min 27°C on Fri night). Winds decreasing (fresh winds from the NNW on Fri morning, light winds from the N by Sun night).

Days 3-6 Weather Summary Light rain (total 4mm), mostly falling on Mon night. Warm (max 29°C on Mon morning, min 27°C on Mon night). Wind will be generally light.

Days 6-9 Weather Summary Mostly dry. Warm (max 29°C on Thu morning, min 26°C on Fri night). Wind will be generally light.

Long Range Forecast: Some drizzle, heaviest during Tue afternoon. Warm (max 29°C on Sun morning, min 26°C on Sun night). Wind will be generally light.

  • 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 Thunders Surf forecast

The above surf forecast table for Thunders provides essential information for determining whether the surfing conditions will be good over the next 12 days. A general guide to surfing at Thunders can be found by selecting the local surf guide option on the grey menu. Our Thunders 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 (Thunders) 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 Thunders 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.

Are you planning a holiday in Mentawi Islands? If you are looking for accommodation near Thunders, camping, hotels and holiday cottages in Mentawi Islands, consider staying in Sungaipenuh which is 172 km (107 miles) away.

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