Nazare Big Wave Challenge Gets Yellow Alert, Could Run Saturday in Giant Waves
70-foot plus waves predicted for Portuguese big wave tow surfing competition.
Surf Forecasts:
Thunders surfForecast / Mentawi Islands / Indonesia
48hr Weather and Surf, issued 12 pm Tuesday 16 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 6PM is: 0.9m 16s primary swell from a Southwest direction and 1.0m 7s secondary swell from a West direction (forecast issued at 12:00pm December 16). The wind direction is predicted to be cross-offshore and the swell rating is 3.
| Time (WIB) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (16 Dec) | 2ft (0.6m) | 18s |
| Afternoon (16 Dec) | 2.5ft (0.8m) | 17s |
| Evening (16 Dec) | 3ft (0.9m) | 16s |
Table - waves today at Thunders. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Tuesday 16 | Wednesday 17 | Thursday 18 | Friday 19 | |||||||||||||||||||||
| 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 | 4 AM | 7 AM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 18 | 18 | 17 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 15 | 15 | 15 | 15 | 15 | 14 | 14 | 14 | 14 | 14 | 14 | 13 | 13 | 13 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 255 | 249 | 334 | 386 | 381 | 381 | 432 | 489 | 532 | 532 | 605 | 657 | 631 | 767 | 472 | 412 | 536 | 529 | 521 | 500 | 357 | 309 | 304 | 295 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross | cross- off | cross- off | cross- off | cross- off | off | off | off | cross- 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 |
High Tide / height (m) | 3:53PM 0.84 | 4:12AM 0.49 | 4:32PM 0.88 | 5:00AM 0.49 | 5:10PM 0.91 | 5:41AM 0.49 | ||||||||||||||||||
Low Tide / height (m) | 10:59PM 0.23 | 9:24AM 0.21 | 11:35PM 0.18 | 10:07AM 0.19 | 12:08AM 0.13 | |||||||||||||||||||
Tuesday 16 | Wednesday 17 | Thursday 18 | Friday 19 | |||||||||||||||||||||
| Sunrise | - | - | - | - | - | - | - | 6:05 | - | - | - | - | - | - | - | 6:05 | - | - | - | - | - | - | - | 6:05 |
| Sunset | - | - | 6:22 | - | - | - | - | - | - | - | 6:23 | - | - | - | - | - | - | - | 6:23 | - | - | - | - | - |
 | | |  | | |  | | | | | | | | |  |  |  | |  | | | | | |
Rain (mm) | 2 | 4 | 2 | 1 | 3 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | 1 | 1 | 1 | - | - | - | - | - | 1 | 1 | 2 | 2 |
| Temp. °C | 27 | 26 | 26 | 26 | 26 | 26 | 25 | 25 | 26 | 26 | 26 | 25 | 25 | 25 | 25 | 25 | 27 | 27 | 27 | 27 | 26 | 26 | 26 | 26 |
| Feels °C (?) | 30 | 28 | 28 | 28 | 29 | 29 | 28 | 28 | 29 | 28 | 28 | 27 | 27 | 27 | 27 | 28 | 29 | 28 | 29 | 30 | 28 | 28 | 28 | 28 |
- 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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