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Surf Forecasts:
Thunders surfForecast / Mentawi Islands / Indonesia
48hr Weather and Surf, issued 6 am Wednesday 20 May 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
30.4° C
(Which is slightly warmer than usual)How big are the waves at Thunders today?
The current surf forecast for Thunders at 11AM is: 1.0m 16s primary swell from a Southwest direction and 1.2m 12s secondary swell from a South direction (forecast issued at 06:00am May 20). The wind direction is predicted to be glassy and the swell rating is 3.
| Time (WIB) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (20 May) | 3.5ft (1.0m) | 16s |
| Afternoon (20 May) | 3.5ft (1.1m) | 16s |
| Evening (20 May) | 3.5ft (1.1m) | 15s |
Table - waves today at Thunders. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastHeavy rain (total 34mm), heaviest during Fri morning. Warm (max 29°C on Wed morning, min 27°C on Wed night). Wind will be generally light. | ||||||||||||||||||||||||
Wednesday 20 | Thursday 21 | Friday 22 | Sat 23 | |||||||||||||||||||||
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 |    |    |    |    | ||||||||||||||||||||
SW 16 | SW 16 | SW 16 | SW 16 | SW 16 | SW 15 | SW 15 | SW 15 | SW 15 | SW 15 | SW 15 | SW 15 | SW 15 | SW 16 | SW 16 | SW 15 | SW 15 | SW 15 | SW 15 | SW 15 | SW 15 | SW 15 | SW 15 | SW 15 | |
523 | 511 | 492 | 635 | 619 | 595 | 565 | 557 | 631 | 696 | 550 | 557 | 572 | 692 | 773 | 657 | 614 | 606 | 685 | 757 | 685 | 784 | 805 | 838 | |
Wind (km/h) | ||||||||||||||||||||||||
glassy | glassy | glassy | glassy | cross | glassy | glassy | glassy | glassy | glassy | glassy | glassy | glassy | glassy | glassy | glassy | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | |
High Tide | 8:17AM1.10m | 8:53PM0.56m | 9:08AM1.02m | 9:53PM0.55m | 10:03AM0.93m | 11:03PM0.56m | ||||||||||||||||||
Low Tide | 1:21AM0.05m | 3:11PM0.03m | 2:10AM0.11m | 4:05PM0.08m | 3:05AM0.18m | 5:02PM0.14m | ||||||||||||||||||
 |  |  | | |  | | | |  | | | |  | | | | | | | | | | | |
 | 6:16 | — | — | — | — | — | — | — | 6:16 | — | — | — | — | — | — | — | 6:16 | — | — | — | — | — | — | 6:16 |
 | — | — | — | — | 6:14 | — | — | — | — | — | — | — | 6:14 | — | — | — | — | — | — | — | 6:14 | — | — | 6:14 |
— | 2 | — | — | 1 | 1 | 3 | 2 | 1 | — | — | 3 | — | — | 1 | 3 | 2 | 2 | 4 | 2 | 3 | — | 1 | 4 | |
Temp °C | 27 | 27 | 29 | 29 | 29 | 28 | 28 | 27 | 27 | 27 | 29 | 28 | 29 | 28 | 28 | 27 | 27 | 27 | 27 | 28 | 28 | 28 | 27 | 27 |
32 | 31 | 34 | 33 | 33 | 33 | 33 | 32 | 32 | 32 | 35 | 33 | 33 | 32 | 33 | 31 | 30 | 30 | 30 | 31 | 31 | 30 | 28 | 29 | |
Swell 1 Height (m) Direction Period (s) | S 12 | S 12 | S 12 | S 12 | S 12 | S 11 | SW 15 | SW 15 | SW 15 | SW 15 | SW 15 | SW 15 | SW 15 | SW 16 | SW 16 | SW 15 | SW 15 | SW 15 | SW 15 | SW 15 | SW 15 | SW 15 | SW 15 | SW 15 |
 kJ | 469 | 400 | 400 | 393 | 383 | 274 | 565 | 557 | 631 | 696 | 550 | 557 | 572 | 692 | 773 | 657 | 614 | 606 | 685 | 757 | 685 | 784 | 805 | 838 |
Swell 2 Height (m) Direction Period (s) | SW 16 | SW 16 | SW 16 | SW 16 | SW 16 | SW 15 | S 9 | S 11 | S 11 | S 11 | S 11 | S 10 | S 10 | S 10 | S 9 | S 9 | S 10 | SSE 9 | S 10 | S 10 | S 9 | WNW 8 | WNW 7 | WNW 7 |
| kJ | 523 | 511 | 492 | 635 | 619 | 595 | 127 | 284 | 231 | 227 | 223 | 194 | 151 | 145 | 139 | 106 | 90 | 45 | 67 | 47 | 76 | 64 | 76 | 70 |
Swell 3 Height (m) Direction Period (s) | WNW 8 | WNW 8 | WNW 8 | WNW 8 | WNW 8 | WNW 8 | S 11 | WNW 7 | WNW 7 | WNW 7 | WNW 7 | WNW 7 | WNW 7 | WNW 7 | WNW 7 | SSE 9 | SSE 9 | S 10 | SSE 8 | SSE 8 | W 16 | S 9 | S 8 | S 8 |
| kJ | 20 | 12 | 11 | 11 | 11 | 11 | 125 | 11 | 11 | 5 | 5 | 5 | 5 | 5 | 5 | 16 | 16 | 47 | 40 | 39 | 20 | 73 | 49 | 50 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | NW 8 | NW 8 | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 17 | 15 | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 0 | 84 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 84 | 84 | 40 |
Best forecast wave conditions in Mentawi Islands | ||||||||||||||||||||||||
Best forecast wave conditions in Indonesia | ||||||||||||||||||||||||
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