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 Monday 15 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 10AM is: 1.2m 8s primary swell from a West direction and 0.6m 11s secondary swell from a South-southwest direction (forecast issued at 06:00am December 15). An open ocean swell of 0.2m 4s is not directed at the surf break. The wind direction is predicted to be cross-offshore and the swell rating is 2.
| Time (WIB) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (15 Dec) | 4.5ft (1.3m) | 8s |
| Afternoon (15 Dec) | 2.5ft (0.7m) | 14s |
| Evening (15 Dec) | 2.5ft (0.7m) | 13s |
Table - waves today at Thunders. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Monday 15 | Tuesday 16 | Wednesday 17 | Thu 18 | |||||||||||||||||||||
| 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) (?) | 8 | 8 | 8 | 8 | 14 | 13 | 13 | 19 | 18 | 18 | 18 | 18 | 17 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 15 | 15 | 15 | 15 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 311 | 217 | 181 | 141 | 200 | 180 | 178 | 178 | 258 | 255 | 255 | 249 | 334 | 386 | 381 | 381 | 432 | 489 | 773 | 773 | 605 | 743 | 714 | 695 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | off | off | cross- off | off | cross- off | off | off | off | off | cross- off | glass | cross- off | cross- off | cross | cross- off | cross- off | cross- off | cross | cross | cross- off | cross- off | cross- off | cross | cross |
High Tide / height (m) | 2:07AM 0.53 | 3:10PM 0.80 | 3:15AM 0.50 | 3:53PM 0.84 | 4:12AM 0.49 | 4:32PM 0.88 | ||||||||||||||||||
Low Tide / height (m) | 7:53AM 0.24 | 10:14PM 0.30 | 8:39AM 0.23 | 10:59PM 0.23 | 9:24AM 0.21 | 11:35PM 0.18 | ||||||||||||||||||
Monday 15 | Tuesday 16 | Wednesday 17 | Thu 18 | |||||||||||||||||||||
| Sunrise | - | 6:03 | - | - | - | - | - | - | - | 6:05 | - | - | - | - | - | - | - | 6:05 | - | - | - | - | - | - |
| Sunset | - | - | - | - | 6:22 | - | - | - | - | - | - | - | 6:22 | - | - | - | - | - | - | - | 6:23 | - | - | - |
 |  |  | | |  | | |  |  |  | | |  | | | |  | | | | | | | |
Rain (mm) | 4 | 3 | 4 | 1 | 1 | - | 1 | - | - | - | - | 1 | 5 | 4 | 3 | - | 3 | 10 | 6 | 12 | 4 | 1 | 1 | 2 |
| Temp. °C | 23 | 23 | 24 | 24 | 25 | 25 | 24 | 25 | 25 | 25 | 27 | 27 | 27 | 26 | 25 | 25 | 25 | 24 | 26 | 25 | 25 | 26 | 26 | 25 |
| Feels °C (?) | 26 | 26 | 28 | 27 | 27 | 28 | 27 | 28 | 29 | 28 | 31 | 31 | 31 | 29 | 29 | 28 | 28 | 27 | 28 | 23 | 25 | 27 | 26 | 25 |
- Map Icons:
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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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