Using Surf-Forecast’s Historical Surf Data To Find The Most Consistent Waves On Earth
Using our statistical data for 7000 spots dating back to 2006, we can find those waves that break the most, with the best winds.
Surf Forecasts:
Mandiri surfForecast / Sumatra – Mainland / Indonesia
48hr Weather and Surf, issued 12 pm Saturday 20 Dec 2025 WIBForecast update in hr min s Forecast update imminent
Mandiri surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Mandiri sea temperature is
29.1° C
(Which is slightly warmer than usual)How big are the waves at Mandiri today?
The current surf forecast for Mandiri at 7PM is: 0.9m 10s primary swell from a South-southwest direction and 0.6m 12s secondary swell from a Southwest direction, 0.6m 4s secondary swell from a West direction (forecast issued at 12:00pm December 20). The wind direction is predicted to be cross-shore.
| Time (WIB) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (20 Dec) | 3.5ft (1.0m) | 11s |
| Afternoon (20 Dec) | 3.5ft (1.0m) | 11s |
| Evening (20 Dec) | 3.5ft (1.1m) | 10s |
Table - waves today at Mandiri. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Saturday 20 | Sunday 21 | Monday 22 | Tuesday 23 | |||||||||||||||||||||
| 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) (?) | 12 | 11 | 12 | 16 | 10 | 10 | 10 | 10 | 9 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 14 | 14 | 14 | 10 | 14 | 14 | 13 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 324 | 256 | 256 | 173 | 240 | 279 | 284 | 279 | 136 | 176 | 217 | 255 | 314 | 223 | 223 | 314 | 372 | 305 | 301 | 297 | 313 | 268 | 318 | 262 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- on | cross- on | cross- on | cross | cross | cross | cross- off | cross | cross | cross- on | cross- on | cross | cross | cross- off | cross- off | cross- off | cross- on | cross- on | cross- on | cross | cross- off | cross- off | cross- off | glass |
High Tide / height (m) | 7:04PM 1.13 | 8:00AM 0.64 | 7:39PM 1.15 | 8:34AM 0.66 | 8:14PM 1.15 | |||||||||||||||||||
Low Tide / height (m) | 12:15PM 0.29 | 2:08AM 0.08 | 12:53PM 0.28 | 2:39AM 0.08 | 1:31PM 0.28 | 3:10AM 0.08 | ||||||||||||||||||
Saturday 20 | Sunday 21 | Monday 22 | Tuesday 23 | |||||||||||||||||||||
| Sunrise | - | - | - | - | - | - | - | 5:48 | - | - | - | - | - | - | - | 5:48 | - | - | - | - | - | - | - | 5:48 |
| Sunset | - | - | 6:14 | - | - | - | - | - | - | - | 6:14 | - | - | - | - | - | - | - | 6:15 | - | - | - | - | - |
 |  | |  |  | | |  | | | | | | | | | | | | | | | | | |
Rain (mm) | - | 1 | 1 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 28 | 28 | 28 | 27 | 26 | 26 | 25 | 26 | 28 | 29 | 28 | 27 | 27 | 26 | 25 | 26 | 28 | 28 | 28 | 27 | 26 | 26 | 26 | 26 |
| Feels °C (?) | 29 | 29 | 29 | 29 | 28 | 28 | 27 | 28 | 29 | 31 | 30 | 30 | 30 | 29 | 27 | 29 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 |
- 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 Mandiri 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.
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