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Surf Forecasts:
Thunders surfForecast / Mentawi Islands / Indonesia
48hr Weather and Surf, issued 6 pm Thursday 21 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
30.2° C
(Which is slightly warmer than usual)How big are the waves at Thunders today?
The current surf forecast for Thunders at 10PM is: 1.3m 16s primary swell from a Southwest direction and 0.8m 10s secondary swell from a South direction, 0.4m 7s secondary swell from a Northwest direction (forecast issued at 06:00pm May 21). The wind direction is predicted to be cross-offshore and the swell rating is 3.
| Time (WIB) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (21 May) | - | - |
| Afternoon (21 May) | 3.5ft (1.1m) | 15s |
| Evening (21 May) | 4.5ft (1.3m) | 16s |
Table - waves today at Thunders. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastHeavy rain (total 26mm), heaviest during Thu night. Warm (max 29°C on Sun morning, min 26°C on Thu night). Wind will be generally light. | ||||||||||||||||||||||||
Thu 21 | Friday 22 | Saturday 23 | Sun 24 | |||||||||||||||||||||
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 | |
Swell Height Map |    |    |    |    | ||||||||||||||||||||
SW 15 | SW 16 | SW 16 | SW 15 | SW 15 | SW 15 | SW 15 | SW 15 | SW 15 | SW 15 | SW 15 | SW 15 | SW 14 | SW 14 | SW 14 | SW 14 | SSW 14 | SW 14 | SW 14 | SSW 13 | SSW 13 | SSW 13 | SW 13 | SW 13 | |
572 | 692 | 773 | 657 | 614 | 606 | 685 | 844 | 773 | 784 | 805 | 838 | 701 | 595 | 604 | 711 | 663 | 564 | 540 | 553 | 465 | 458 | 394 | 394 | |
Wind (km/h) | ||||||||||||||||||||||||
cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | off | off | glassy | cross-off | cross-off | cross-off | off | off | off | off | cross-off | |
High Tide | 9:53PM0.55m | 10:03AM0.93m | 11:03PM0.56m | 11:03AM0.84m | 00:20AM0.61m | 12:08PM0.75m | ||||||||||||||||||
Low Tide | 4:05PM0.08m | 3:05AM0.18m | 5:02PM0.14m | 4:11AM0.27m | 6:01PM0.18m | 5:39AM0.34m | ||||||||||||||||||
 |  | | | | | | | |  | |  | |  |  | | | | | | | | | | |
 | — | — | — | — | 6:16 | — | — | — | — | — | — | — | 6:16 | — | — | — | — | — | — | — | 6:16 | — | — | — |
 | 6:14 | — | — | — | — | — | — | — | 6:14 | — | — | — | — | — | — | — | 6:14 | — | — | — | — | — | — | 6:14 |
3 | 3 | 2 | 4 | 3 | 1 | 3 | 2 | 1 | — | — | — | — | — | — | — | — | — | — | 1 | 2 | 1 | — | — | |
Temp °C | 28 | 27 | 27 | 26 | 27 | 27 | 27 | 28 | 28 | 27 | 27 | 27 | 27 | 27 | 28 | 28 | 28 | 28 | 28 | 27 | 27 | 27 | 28 | 29 |
30 | 30 | 30 | 29 | 29 | 29 | 29 | 29 | 29 | 28 | 30 | 31 | 30 | 31 | 32 | 33 | 33 | 33 | 33 | 31 | 31 | 31 | 32 | 32 | |
Swell 1 Height (m) Direction Period (s) | SW 15 | SW 16 | SW 16 | SW 15 | SW 15 | SW 15 | SW 15 | SW 15 | SW 15 | SW 15 | SW 15 | SW 15 | SW 14 | SW 14 | SW 14 | SW 14 | SSW 14 | SW 14 | SW 14 | SSW 13 | SSW 13 | SSW 13 | SW 13 | SW 13 |
 kJ | 572 | 692 | 773 | 657 | 614 | 606 | 685 | 844 | 773 | 784 | 805 | 838 | 701 | 595 | 604 | 711 | 663 | 564 | 540 | 553 | 465 | 458 | 394 | 394 |
Swell 2 Height (m) Direction Period (s) | S 10 | S 10 | S 10 | S 10 | S 9 | S 10 | S 10 | S 10 | S 9 | SSE 9 | S 8 | W 6 | W 6 | W 7 | W 7 | S 8 | WNW 7 | WNW 8 | WNW 8 | WNW 8 | WNW 8 | WNW 8 | WNW 8 | WNW 8 |
| kJ | 151 | 143 | 118 | 121 | 38 | 92 | 67 | 48 | 78 | 30 | 34 | 52 | 55 | 59 | 33 | 31 | 29 | 49 | 50 | 36 | 36 | 37 | 39 | 38 |
Swell 3 Height (m) Direction Period (s) | W 7 | W 7 | SSE 9 | SSE 9 | S 10 | SSE 9 | SSE 8 | SSE 9 | W 16 | SSW 10 | S 10 | S 8 | S 8 | S 8 | WNW 7 | W 6 | S 7 | S 7 | S 7 | SE 8 | SE 8 | SE 8 | S 7 | S 9 |
| kJ | 1 | 1 | 8 | 16 | 48 | 16 | 28 | 30 | 20 | 34 | 18 | 34 | 34 | 35 | 18 | 21 | 26 | 23 | 23 | 2 | 2 | 2 | 17 | 24 |
Wind waves Height (m) Direction Period (s) | NW 7 | NW 7 | NW 7 | NW 7 | NW 7 | NW 7 | NW 4 | WNW 4 | WNW 6 | W 6 | W 6 | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | 12 | 12 | 12 | 17 | 17 | 23 | 6 | 10 | 68 | 78 | 68 | — | — | — | — | — | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 31 | 0 | 0 | 0 | 84 | 84 | 84 | 84 | 84 | 84 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Best forecast wave conditions in Mentawi Islands | ||||||||||||||||||||||||
Best forecast wave conditions in Indonesia | ||||||||||||||||||||||||
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