- Forecast
- Maps
- Live
- Weather State
- Spot Information
Surf Forecasts:
Thunders surfForecast / Mentawi Islands / Indonesia
48hr Weather and Surf, issued 6 pm 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
30.2° C
(Which is slightly warmer than usual)How big are the waves at Thunders today?
The current surf forecast for Thunders at 2AM is: 1.1m 15s primary swell from a Southwest direction and 1.1m 11s secondary swell from a South direction (forecast issued at 06:00pm May 20). The wind direction is predicted to be glassy and the swell rating is 3.
| Time (WIB) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (21 May) | 3.5ft (1.1m) | 15s |
| Afternoon (21 May) | 3.5ft (1.1m) | 15s |
| Evening (21 May) | 4ft (1.2m) | 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 55mm), heaviest during Wed night. Warm (max 29°C on Wed afternoon, min 25°C on Thu afternoon). Wind will be generally light. | ||||||||||||||||||||||||
Wed 20 | Thursday 21 | Friday 22 | Sat 23 | |||||||||||||||||||||
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 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 | SW 14 | SW 14 | SW 14 | SSW 14 | |
619 | 595 | 565 | 557 | 631 | 696 | 550 | 557 | 572 | 692 | 783 | 666 | 614 | 606 | 685 | 685 | 685 | 784 | 805 | 838 | 621 | 540 | 548 | 653 | |
Wind (km/h) | ||||||||||||||||||||||||
glassy | glassy | glassy | glassy | off | off | off | cross-off | 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 | cross-off | off | cross-off | |
High Tide | 8:53PM0.56m | 9:08AM1.02m | 9:53PM0.55m | 10:03AM0.93m | 11:03PM0.56m | 11:03AM0.84m | ||||||||||||||||||
Low Tide | 3:11PM0.03m | 2:10AM0.11m | 4:05PM0.08m | 3:05AM0.18m | 5:02PM0.14m | 4:11AM0.27m | ||||||||||||||||||
 |  | | | | | | | | |  | | | |  |  | | | | | | | | | |
 | — | — | — | — | 6:16 | — | — | — | — | — | — | — | 6:16 | — | — | — | — | — | — | — | 6:16 | — | — | — |
 | 6:14 | — | — | — | — | — | — | — | 6:14 | — | — | — | — | — | — | — | 6:14 | — | — | — | — | — | — | 6:14 |
1 | 2 | 6 | 3 | 2 | 1 | 5 | 4 | 5 | 2 | 1 | 2 | 3 | 2 | — | — | — | 1 | 2 | 3 | 3 | 2 | 3 | 2 | |
Temp °C | 29 | 28 | 27 | 27 | 27 | 27 | 27 | 28 | 26 | 25 | 26 | 26 | 26 | 27 | 28 | 29 | 29 | 27 | 27 | 26 | 27 | 26 | 27 | 28 |
34 | 34 | 32 | 32 | 31 | 31 | 31 | 30 | 27 | 27 | 28 | 28 | 28 | 29 | 30 | 30 | 31 | 28 | 28 | 28 | 29 | 29 | 31 | 31 | |
Swell 1 Height (m) Direction Period (s) | 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 | SW 14 | SW 14 | SW 14 | SSW 14 |
 kJ | 383 | 274 | 565 | 557 | 631 | 696 | 550 | 557 | 572 | 692 | 783 | 666 | 614 | 606 | 685 | 685 | 685 | 784 | 805 | 838 | 621 | 540 | 548 | 653 |
Swell 2 Height (m) Direction Period (s) | 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 | S 10 | S 10 | S 10 | S 9 | S 9 | S 8 | S 8 | S 8 | W 8 | W 7 | WNW 7 |
| kJ | 619 | 595 | 127 | 284 | 279 | 227 | 223 | 194 | 151 | 143 | 137 | 106 | 90 | 68 | 47 | 48 | 78 | 55 | 50 | 34 | 34 | 115 | 109 | 111 |
Swell 3 Height (m) Direction Period (s) | WNW 8 | WNW 8 | S 11 | WNW 7 | WNW 7 | WNW 7 | WNW 7 | WNW 7 | WNW 7 | S 10 | S 16 | SE 9 | NW 7 | SSE 9 | SSE 8 | SSE 8 | W 16 | W 16 | S 11 | SE 8 | SE 8 | S 8 | SSW 9 | SSE 8 |
| kJ | 11 | 11 | 125 | 11 | 11 | 5 | 5 | 5 | 5 | 71 | 5 | 21 | 12 | 31 | 28 | 40 | 20 | 20 | 9 | 3 | 3 | 34 | 26 | 21 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | NW 7 | NW 7 | NW 7 | WNW 4 | NW 7 | WNW 4 | WNW 6 | WNW 6 | WNW 6 | WNW 6 | WNW 5 | WNW 7 | NNW 4 | NNW 3 | N 4 |
| kJ | — | — | — | — | — | — | — | — | — | 12 | 12 | 12 | 2 | 17 | 13 | 53 | 68 | 50 | 43 | 40 | 84 | 6 | 3 | 13 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 162 | 0 | 31 | 84 | 84 | 84 | 84 | 0 | 84 | 84 | 84 | 84 | 84 | 84 | 0 | 0 | 0 |
Best forecast wave conditions in Mentawi Islands | ||||||||||||||||||||||||
Best forecast wave conditions in Indonesia | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
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 Thunders 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.
Nearest