Nazare Big Wave Challenge Gets Yellow Alert, Could Run Saturday in Giant Waves
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Surf Forecasts:
Thunders surfForecast / Mentawi Islands / Indonesia
48hr Weather and Surf, issued 6 am Wednesday 17 Dec 2025 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
29.4° C
(Which is slightly warmer than usual)How big are the waves at Thunders today?
The current surf forecast for Thunders at 12PM is: 1.1m 16s primary swell from a Southwest direction and 0.8m 7s secondary swell from a West direction (forecast issued at 06:00am December 17). The wind direction is predicted to be offshore and the swell rating is 3.
| Time (WIB) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (17 Dec) | 3.5ft (1.0m) | 16s |
| Afternoon (17 Dec) | 3.5ft (1.1m) | 15s |
| Evening (17 Dec) | 4ft (1.2m) | 15s |
Table - waves today at Thunders. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Wednesday 17 | Thursday 18 | Friday 19 | Sat 20 | |||||||||||||||||||||
| 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 | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 16 | 16 | 16 | 16 | 15 | 15 | 15 | 15 | 15 | 14 | 14 | 14 | 14 | 14 | 14 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 12 | 12 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 432 | 489 | 532 | 532 | 605 | 589 | 631 | 767 | 757 | 536 | 529 | 529 | 401 | 450 | 357 | 309 | 304 | 295 | 295 | 245 | 281 | 238 | 255 | 218 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | off | off | off | off | cross- off | cross- off | cross- off | cross- off | cross- 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 |
High Tide / height (m) | 4:12AM 0.49 | 4:32PM 0.88 | 5:00AM 0.49 | 5:10PM 0.91 | 5:41AM 0.49 | 5:47PM 0.93 | ||||||||||||||||||
Low Tide / height (m) | 9:24AM 0.21 | 11:35PM 0.18 | 10:07AM 0.19 | 12:08AM 0.13 | 10:48AM 0.16 | 12:41AM 0.10 | ||||||||||||||||||
Wednesday 17 | Thursday 18 | Friday 19 | Sat 20 | |||||||||||||||||||||
| Sunrise | - | 6:05 | - | - | - | - | - | - | - | 6:05 | - | - | - | - | - | - | - | 6:05 | - | - | - | - | - | - |
| Sunset | - | - | - | - | 6:23 | - | - | - | - | - | - | - | 6:23 | - | - | - | - | - | - | - | 6:24 | - | - | - |
 |  |  | | |  | | | | | | |  | | | | | | | | | |  | | |
Rain (mm) | 2 | 1 | - | 1 | 3 | - | 1 | 1 | 2 | 5 | 1 | - | - | 1 | 2 | 2 | 3 | 2 | 2 | 2 | 1 | - | - | 1 |
| Temp. °C | 25 | 25 | 26 | 26 | 27 | 26 | 26 | 25 | 25 | 26 | 26 | 27 | 27 | 26 | 26 | 26 | 26 | 26 | 27 | 27 | 28 | 27 | 27 | 26 |
| Feels °C (?) | 28 | 28 | 28 | 28 | 29 | 28 | 28 | 26 | 26 | 28 | 28 | 29 | 29 | 28 | 29 | 28 | 28 | 28 | 29 | 28 | 29 | 29 | 29 | 28 |
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Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
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