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Surf Forecasts:
Thunders surfForecast / Mentawi Islands / Indonesia
48hr Weather and Surf, issued 6 am Monday 18 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: 1.5m 15s primary swell from a South direction and 0.7m 9s secondary swell from a West direction (forecast issued at 06:00am May 18). The wind direction is predicted to be cross-onshore.
| Time (WIB) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (18 May) | 4.5ft (1.4m) | 15s |
| Afternoon (18 May) | 5ft (1.5m) | 14s |
| Evening (18 May) | 5ft (1.5m) | 14s |
Table - waves today at Thunders. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastModerate rain (total 11mm), heaviest on Tue night. Warm (max 29°C on Mon morning, min 27°C on Mon night). Wind will be generally light. | ||||||||||||||||||||||||
Monday 18 | Tuesday 19 | Wednesday 20 | Thu 21 | |||||||||||||||||||||
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 15 | S 15 | S 15 | S 15 | S 14 | S 14 | S 14 | S 14 | S 13 | S 13 | S 13 | S 13 | S 13 | SW 16 | S 12 | S 12 | SW 16 | SW 16 | SW 16 | SW 16 | SW 16 | SW 15 | SW 15 | SW 15 | |
548 | 631 | 892 | 1051 | 868 | 868 | 999 | 971 | 796 | 760 | 760 | 749 | 633 | 432 | 563 | 477 | 523 | 511 | 492 | 635 | 627 | 595 | 565 | 557 | |
Wind (km/h) | ||||||||||||||||||||||||
cross-on | cross-on | cross-on | on | on | on | on | cross-on | cross-on | glassy | glassy | cross-on | cross | cross-on | glassy | glassy | glassy | glassy | glassy | cross-on | cross-on | on | glassy | cross-on | |
High Tide | 6:41AM1.16m | 7:11PM0.61m | 7:28AM1.15m | 8:00PM0.58m | 8:17AM1.10m | 8:53PM0.56m | ||||||||||||||||||
Low Tide | 1:30PM-0.03m | 00:36AM0.02m | 2:20PM-0.01m | 1:21AM0.05m | 3:11PM0.03m | |||||||||||||||||||
 |  |  |  |  | |  |  | | | | | | | | | | | | | | | | | |
 | 6:16 | — | — | — | — | — | — | — | 6:16 | — | — | — | — | — | — | — | 6:16 | — | — | — | — | — | — | 6:16 |
 | — | — | — | — | 6:14 | — | — | — | — | — | — | — | 6:14 | — | — | — | — | — | — | — | 6:14 | — | — | 6:14 |
— | — | 1 | — | — | — | — | 1 | 1 | — | 1 | 1 | 1 | — | 1 | 1 | 2 | — | — | — | — | — | — | — | |
Temp °C | 27 | 27 | 28 | 29 | 29 | 28 | 28 | 27 | 27 | 27 | 29 | 29 | 29 | 28 | 28 | 27 | 27 | 27 | 28 | 28 | 29 | 28 | 28 | 27 |
30 | 30 | 31 | 33 | 32 | 32 | 32 | 31 | 31 | 32 | 35 | 34 | 33 | 32 | 33 | 32 | 32 | 32 | 33 | 32 | 33 | 32 | 32 | 31 | |
Swell 1 Height (m) Direction Period (s) | S 15 | S 15 | S 15 | S 15 | S 14 | S 14 | S 14 | S 14 | S 13 | S 13 | S 13 | S 13 | S 13 | S 12 | S 12 | S 12 | S 12 | S 12 | S 12 | S 12 | S 10 | S 11 | SW 15 | SW 15 |
 kJ | 548 | 631 | 892 | 1051 | 868 | 868 | 999 | 971 | 796 | 760 | 760 | 749 | 633 | 362 | 563 | 477 | 469 | 400 | 400 | 387 | 308 | 326 | 565 | 557 |
Swell 2 Height (m) Direction Period (s) | SSW 13 | SSW 12 | W 9 | W 9 | W 9 | W 8 | W 8 | SW 18 | SW 18 | SW 18 | SW 18 | SW 16 | SW 16 | SW 16 | SW 16 | SW 16 | SW 16 | SW 16 | SW 16 | SW 16 | SW 16 | SW 15 | S 9 | S 11 |
| kJ | 253 | 240 | 76 | 56 | 55 | 52 | 51 | 375 | 370 | 304 | 246 | 260 | 310 | 432 | 498 | 443 | 523 | 511 | 492 | 635 | 627 | 595 | 133 | 284 |
Swell 3 Height (m) Direction Period (s) | WNW 9 | W 9 | S 8 | SW 19 | SW 19 | SW 19 | SW 18 | W 8 | W 8 | W 8 | W 8 | WNW 8 | WNW 8 | S 9 | WNW 8 | WNW 8 | WNW 8 | WNW 8 | WNW 8 | WNW 8 | WNW 8 | WNW 8 | S 11 | WNW 7 |
| kJ | 82 | 78 | 33 | 236 | 133 | 130 | 155 | 35 | 35 | 34 | 34 | 22 | 22 | 122 | 22 | 21 | 12 | 12 | 12 | 11 | 11 | 11 | 127 | 11 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 3 | 3 | 3 | 3 | 62 | 3 | 3 | 3 | 3 | 0 | 0 | 84 | 84 | 9 | 0 | 0 | 0 | 0 | 0 | 62 | 84 | 31 | 0 | 3 |
Best forecast wave conditions in Mentawi Islands | ||||||||||||||||||||||||
Best forecast wave conditions in Indonesia | ||||||||||||||||||||||||
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