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Surf Forecasts:
Thunders surfForecast / Mentawi Islands / Indonesia
48hr Weather and Surf, issued 12 pm Thursday 18 Sep 2025 WIB
How big are the waves at Thunders today?
The current surf forecast for Thunders at 3PM is: 1.7m 13s primary swell from a South direction and 0.3m 7s secondary swell from a West-northwest direction (forecast issued at 12:00pm September 18). The wind direction is predicted to be cross-shore.
| Time (WIB) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (18 Sep) | 5.5ft (1.7m) | 13s |
| Afternoon (18 Sep) | 5.5ft (1.7m) | 13s |
| Evening (18 Sep) | 5ft (1.6m) | 13s |
Table - waves today at Thunders. (Swell directed towards the surf break)
Thursday 18 | Friday 19 | Saturday 20 | Sunday 21 | |||||||||||||||||||||
| 10 AM | 1 PM | 4 PM | 7 PM | 10 PM | 1 AM | 4 AM | 7 AM | 10 AM | 1 PM | 4 PM | 7 PM | 10 PM | 1 AM | 4 AM | 7 AM | 10 AM | 1 PM | 4 PM | 7 PM | 10 PM | 1 AM | 4 AM | 7 AM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 13 | 13 | 13 | 12 | 13 | 14 | 12 | 12 | 12 | 17 | 17 | 18 | 14 | 16 | 17 | 18 | 17 | 17 | 16 | 16 | 16 | 16 | 16 | 16 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 1074 | 1018 | 1018 | 660 | 862 | 1081 | 454 | 544 | 544 | 400 | 377 | 418 | 1045 | 1018 | 1949 | 2264 | 986 | 952 | 875 | 940 | 940 | 1397 | 917 | 822 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- on | cross | cross- on | cross- on | cross- off | cross | glass | glass | glass | on | on | cross- on | cross- on | cross- off | cross- off | cross- off | glass | cross | glass | glass | glass | cross | glass | cross |
High Tide / height (m) | 4:21PM 0.55 | 4:18AM 0.85 | 5:02PM 0.65 | 5:02AM 0.88 | 5:36PM 0.75 | 5:39AM 0.88 | ||||||||||||||||||
Low Tide / height (m) | 9:48PM 0.26 | 11:11AM 0.13 | 10:45PM 0.21 | 11:37AM 0.11 | 11:29PM 0.17 | |||||||||||||||||||
Thursday 18 | Friday 19 | Saturday 20 | Sunday 21 | |||||||||||||||||||||
| Sunrise | - | - | - | - | - | - | - | 6:09 | - | - | - | - | - | - | - | 6:09 | - | - | - | - | - | - | - | 6:09 |
| Sunset | - | - | 6:15 | - | - | - | - | - | - | - | 6:15 | - | - | - | - | - | - | - | 6:15 | - | - | - | - | - |
 |  | |  |  | |  | | | | | | | | | |  | | | |  | | |  | |
Rain (mm) | - | 1 | - | - | 1 | 1 | - | 1 | 1 | - | - | - | 1 | 1 | - | - | - | - | 1 | - | - | - | - | - |
| Temp. °C | 28 | 28 | 28 | 27 | 26 | 26 | 26 | 26 | 27 | 28 | 27 | 27 | 26 | 26 | 26 | 26 | 27 | 28 | 28 | 27 | 27 | 27 | 26 | 26 |
| Feels °C (?) | 31 | 31 | 31 | 30 | 30 | 30 | 30 | 30 | 31 | 32 | 31 | 31 | 29 | 30 | 30 | 30 | 31 | 31 | 32 | 31 | 31 | 31 | 30 | 30 |
- Map Icons:
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Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
Recent Eyeball Surf Reports for Mentawi Islands
Continuing clean conditions at Thunders (light winds from the WSW at MiaPadang 253 km from Thunders). 1.1m 10s swell from the S with a 0.4m 10s swell from the SW. 2 swells combining to make bigger set waves.
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