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Mandiri Surf Forecast
/ Sumatra – Mainland (12 surf breaks) /
Surf Forecasts:
Mandiri surfForecast / Sumatra – Mainland / Indonesia
48hr Weather and Surf, issued 6 pm Tuesday 16 Sep 2025 WIB
How big are the waves at Mandiri today?
The current surf forecast for Mandiri at 11PM is: 2.1m 16s primary swell from a South-southwest direction and 1.1m 7s secondary swell from a South-southeast direction, 1.6m 7s secondary swell from a South-southeast direction (forecast issued at 06:00pm September 16). The wind direction is predicted to be glassy and the swell rating is 4.
| Time (WIB) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (16 Sep) | - | - |
| Afternoon (16 Sep) | 6ft (1.8m) | 16s |
| Evening (16 Sep) | 6.5ft (2.0m) | 16s |
Table - waves today at Mandiri. (Swell directed towards the surf break)
Tuesday 16 | Wednesday 17 | Thursday 18 | Friday 19 | |||||||||||||||||||||
| 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 | 10 AM | 1 PM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 16 | 16 | 16 | 15 | 15 | 15 | 15 | 15 | 14 | 14 | 14 | 14 | 14 | 13 | 13 | 13 | 13 | 13 | 13 | 12 | 12 | 15 | 14 | 13 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 1626 | 1948 | 2054 | 2102 | 2047 | 1850 | 1825 | 1622 | 1393 | 1939 | 1206 | 1833 | 1541 | 1359 | 1339 | 1162 | 1162 | 606 | 835 | 555 | 488 | 1045 | 671 | 608 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross | glass | off | cross- off | glass | glass | cross- on | cross- on | glass | glass | glass | cross- off | cross- off | glass | cross- off | cross- on | cross | glass | cross- off | cross- off | off | glass | glass | on |
High Tide / height (m) | 1:47PM 0.49 | 2:12AM 0.95 | 4:02PM 0.54 | 3:45AM 0.95 | 5:14PM 0.65 | 4:55AM 0.97 | ||||||||||||||||||
Low Tide / height (m) | 6:09PM 0.38 | 10:18AM 0.28 | 8:34PM 0.44 | 11:17AM 0.24 | 10:30PM 0.40 | 11:55AM 0.20 | ||||||||||||||||||
Tuesday 16 | Wednesday 17 | Thursday 18 | Friday 19 | |||||||||||||||||||||
| Sunrise | - | - | - | - | - | 5:56 | - | - | - | - | - | - | - | 5:56 | - | - | - | - | - | - | - | 5:54 | - | - |
| Sunset | 6:00 | - | - | - | - | - | - | - | 6:00 | - | - | - | - | - | - | - | 6:00 | - | - | - | - | - | - | - |
 |  | | |  |  | | | | |  | | |  |  |  | |  |  | | |  |  | | |
Rain (mm) | 5 | 5 | 2 | 1 | 1 | 1 | 2 | 2 | 3 | 4 | 3 | 2 | 5 | 11 | 1 | - | 2 | - | - | - | - | - | - | 1 |
| Temp. °C | 27 | 26 | 25 | 25 | 25 | 25 | 27 | 27 | 27 | 26 | 25 | 24 | 24 | 24 | 25 | 26 | 26 | 26 | 25 | 25 | 24 | 25 | 28 | 28 |
| Feels °C (?) | 31 | 30 | 29 | 29 | 29 | 29 | 31 | 30 | 31 | 30 | 29 | 27 | 28 | 28 | 28 | 30 | 30 | 31 | 29 | 29 | 27 | 29 | 32 | 31 |
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Break
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 Sumatra - Mainland
Recent cross-shore wind 136 km from Mandiri has fallen light (calm at TanjungKarangRadinInten II). Waves should be turning clean at Mandiri. 1.8m 16s long period groundswell from the SSW with a 1.1m 7s swell from the SSE. 2 swells combining so expect closeout sets.
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