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Surf Forecasts:
Thunders surfForecast / Mentawi Islands / Indonesia
48hr Weather and Surf, issued 6 am Saturday 25 Apr 2026 WIBForecast 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
30.0° C
(Which is normal for this time of year)How big are the waves at Thunders today?
The current surf forecast for Thunders at 1PM is: 1.1m 18s primary swell from a South-southwest direction and 1.3m 12s secondary swell from a South direction (forecast issued at 06:00am April 25). The wind direction is predicted to be cross-shore.
| Time (WIB) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (25 Apr) | 3ft (0.9m) | 19s |
| Afternoon (25 Apr) | 4ft (1.2m) | 17s |
| Evening (25 Apr) | 5.5ft (1.7m) | 17s |
Table - waves today at Thunders. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastModerate rain (total 18mm), heaviest on Sat night. Warm (max 29°C on Sat morning, min 25°C on Sat night). Wind will be generally light. | ||||||||||||||||||||||||
Saturday 25 | Sunday 26 | Monday 27 | Tue 28 | |||||||||||||||||||||
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 | 4 PM | 7 PM | 10 PM | 1 AM | |
Swell Height Map |    |    |    |    | ||||||||||||||||||||
S 12 | S 12 | SSW 19 | SSW 18 | SSW 17 | SSW 17 | SSW 16 | SSW 16 | SSW 16 | SSW 16 | SSW 15 | SSW 15 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | SSW 13 | SSW 13 | SSW 13 | SSW 13 | SSW 13 | SSW 13 | S 12 | S 12 | |
584 | 488 | 772 | 817 | 908 | 1201 | 2013 | 1707 | 1822 | 1776 | 1685 | 1421 | 1382 | 1206 | 1075 | 1045 | 849 | 811 | 679 | 590 | 581 | 572 | 522 | 425 | |
Wind (km/h) | ||||||||||||||||||||||||
cross-on | glassy | glassy | cross | glassy | glassy | cross-off | cross-off | cross-off | cross-off | glassy | cross-off | cross | glassy | glassy | glassy | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | |
High Tide | 12:42PM0.77m | 2:15AM0.56m | 2:05PM0.74m | 3:20AM0.66m | 3:13PM0.73m | |||||||||||||||||||
Low Tide | 5:25AM0.32m | 8:06PM0.22m | 7:37AM0.36m | 9:04PM0.20m | 9:17AM0.32m | 9:45PM0.18m | ||||||||||||||||||
 |  |  | |  | |  | | |  | | | |  | | | | | | | | | | | |
 | 6:16 | — | — | — | — | — | — | — | 6:16 | — | — | — | — | — | — | — | 6:16 | — | — | — | — | — | — | 6:16 |
 | — | — | — | — | 6:16 | — | — | — | — | — | — | — | 6:16 | — | — | — | — | — | — | — | 6:16 | — | — | 6:16 |
— | — | — | — | 1 | — | 5 | 5 | 2 | — | — | — | — | — | — | 1 | — | — | — | — | — | — | — | — | |
Temp °C | 27 | 27 | 29 | 29 | 29 | 29 | 27 | 26 | 25 | 25 | 26 | 28 | 28 | 28 | 27 | 27 | 26 | 27 | 29 | 29 | 29 | 28 | 28 | 28 |
31 | 32 | 34 | 33 | 34 | 34 | 31 | 28 | 26 | 28 | 31 | 31 | 31 | 33 | 31 | 32 | 29 | 29 | 31 | 30 | 31 | 31 | 31 | 31 | |
Swell 1 Height (m) Direction Period (s) | S 12 | S 12 | S 12 | S 12 | SSW 17 | SSW 17 | SSW 16 | SSW 16 | SSW 16 | SSW 16 | SSW 15 | SSW 15 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | SSW 13 | SSW 13 | SSW 13 | SSW 13 | SSW 13 | SSW 13 | S 12 | S 12 |
 kJ | 584 | 488 | 480 | 472 | 908 | 1201 | 2013 | 1707 | 1822 | 1776 | 1685 | 1421 | 1382 | 1206 | 1075 | 1045 | 849 | 811 | 679 | 590 | 581 | 572 | 522 | 425 |
Swell 2 Height (m) Direction Period (s) | SW 14 | SSW 19 | SSW 19 | SSW 18 | S 12 | S 12 | SW 13 | SW 13 | SW 13 | SW 13 | — | — | — | SW 15 | — | S 20 | S 19 | S 18 | S 18 | S 18 | S 17 | S 16 | S 16 | S 16 |
| kJ | 103 | 391 | 772 | 817 | 411 | 396 | 45 | 44 | 44 | 27 | — | — | — | 8 | — | 8 | 29 | 60 | 56 | 150 | 215 | 264 | 251 | 318 |
Swell 3 Height (m) Direction Period (s) | S 20 | SW 14 | SW 14 | SW 14 | SW 14 | SW 13 | — | — | — | — | — | — | — | — | — | — | — | S 24 | SW 23 | SW 23 | WSW 17 | SW 17 | SSW 21 | SE 8 |
| kJ | 200 | 130 | 127 | 67 | 46 | 45 | — | — | — | — | — | — | — | — | — | — | — | 11 | 21 | 21 | 29 | 11 | 45 | 11 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | SSE 3 | SSE 3 | SSE 3 | SSE 3 |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 3 | 3 | 4 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 3 | 0 | 0 | 84 | 0 | 0 | 0 | 31 | 31 | 0 | 0 | 0 | 84 | 0 | 0 | 0 | 3 | 3 | 62 | 62 | 62 | 3 | 9 | 9 |
Best forecast wave conditions in Mentawi Islands | ||||||||||||||||||||||||
Best forecast wave conditions in Indonesia | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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