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:
Telescopes surfForecast / Mentawi Islands / Indonesia
48hr Weather and Surf, issued 12 am Monday 15 Dec 2025 WIBForecast update in hr min s Forecast update imminent
Telescopes surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Telescopes sea temperature is
29.4° C
(Which is slightly warmer than usual)How big are the waves at Telescopes today?
The current surf forecast for Telescopes at 2AM is: 1.4m 9s primary swell from a West direction and 0.6m 11s secondary swell from a South-southwest direction, 0.5m 4s secondary swell from a North direction (forecast issued at 12:00am December 15). The wind direction is predicted to be cross-onshore.
| Time (WIB) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (15 Dec) | 3.5ft (1.0m) | 8s |
| Afternoon (15 Dec) | 2.5ft (0.7m) | 14s |
| Evening (15 Dec) | 2.5ft (0.7m) | 13s |
Table - waves today at Telescopes. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Monday 15 | Tuesday 16 | Wednesday 17 | ||||||||||||||||||||||
| 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 | 4 PM | 7 PM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 9 | 9 | 8 | 8 | 8 | 8 | 14 | 14 | 13 | 13 | 18 | 18 | 18 | 18 | 17 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 15 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 422 | 304 | 228 | 161 | 124 | 93 | 206 | 186 | 180 | 178 | 216 | 211 | 211 | 209 | 302 | 274 | 271 | 268 | 381 | 367 | 477 | 471 | 471 | 519 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross | cross | cross- on | cross- on | on | on | on | on | on | cross- on | cross | cross- off | cross- off | cross- on | cross- on | cross | cross | cross- on | cross- on | on | on | on | on | on |
High Tide / height (m) | 2:41AM 0.69 | 3:29PM 0.98 | 3:43AM 0.67 | 4:14PM 1.03 | 4:35AM 0.66 | 4:54PM 1.07 | ||||||||||||||||||
Low Tide / height (m) | 9:04PM 0.44 | 8:04AM 0.30 | 10:16PM 0.37 | 8:53AM 0.28 | 11:01PM 0.30 | 9:40AM 0.26 | ||||||||||||||||||
Monday 15 | Tuesday 16 | Wednesday 17 | ||||||||||||||||||||||
| Sunrise | - | - | - | 6:09 | - | - | - | - | - | - | - | 6:09 | - | - | - | - | - | - | - | 6:09 | - | - | - | - |
| Sunset | - | - | - | - | - | - | 6:22 | - | - | - | - | - | - | - | 6:23 | - | - | - | - | - | - | - | 6:23 | - |
 | | |  |  | | | | | |  | | |  | | |  | | | | | |  | | |
Rain (mm) | 2 | 2 | 3 | 4 | 2 | 1 | 2 | 4 | 5 | 3 | 3 | 1 | 1 | 2 | 2 | 2 | - | 2 | 3 | 3 | 1 | 5 | 6 | 1 |
| Temp. °C | 25 | 26 | 26 | 26 | 26 | 26 | 25 | 25 | 25 | 25 | 26 | 26 | 26 | 27 | 26 | 26 | 27 | 26 | 26 | 26 | 27 | 25 | 25 | 26 |
| Feels °C (?) | 26 | 29 | 28 | 29 | 29 | 29 | 26 | 27 | 27 | 28 | 30 | 29 | 30 | 30 | 29 | 29 | 30 | 30 | 28 | 28 | 30 | 24 | 26 | 26 |
- 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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