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:
San Mateo surfForecast / Manabi / Ecuador
48hr Weather and Surf, issued 6 am Saturday 13 Dec 2025 -05Forecast update in hr min s Forecast update imminent
San Mateo surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's San Mateo sea temperature is
24.9° C
(Which is 1.5°C warmer than normal for this time of year)How big are the waves at San Mateo today?
The current surf forecast for San Mateo at 10AM is: 0.5m 12s primary swell from a Southwest direction and 0.9m 6s secondary swell from a Southwest direction (forecast issued at 06:00am December 13). The wind direction is predicted to be cross-onshore.
| Time (-05) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (13 Dec) | 1.5ft (0.5m) | 12s |
| Afternoon (13 Dec) | 1.5ft (0.5m) | 11s |
| Evening (13 Dec) | 1.5ft (0.5m) | 13s |
Table - waves today at San Mateo. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Saturday 13 | Sunday 14 | Monday 15 | Tue 16 | |||||||||||||||||||||
| 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) (?) | 12 | 12 | 12 | 11 | 13 | 16 | 13 | 11 | 11 | 11 | 11 | 11 | 15 | 15 | 15 | 15 | 12 | 11 | 11 | 16 | 16 | 16 | 12 | 12 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 71 | 66 | 65 | 63 | 87 | 66 | 85 | 57 | 56 | 57 | 57 | 56 | 54 | 54 | 56 | 75 | 41 | 58 | 58 | 91 | 91 | 91 | 68 | 68 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross | cross | cross- on | cross- on | cross- on | cross- on | cross | cross | cross | cross | cross- on | cross- on | cross- on | cross- on | cross- on | cross | cross | cross | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on |
High Tide / height (m) | 10:42AM 1.92 | 11:05PM 2.14 | 11:49AM 1.92 | 12:00AM 2.11 | 12:48PM 1.96 | 12:51AM 2.11 | ||||||||||||||||||
Low Tide / height (m) | 4:35AM 0.73 | 4:42PM 0.81 | 5:36AM 0.72 | 5:44PM 0.87 | 6:31AM 0.67 | 6:42PM 0.87 | ||||||||||||||||||
Saturday 13 | Sunday 14 | Monday 15 | Tue 16 | |||||||||||||||||||||
| Sunrise | - | 6:11 | - | - | - | - | - | - | - | 6:11 | - | - | - | - | - | - | - | 6:11 | - | - | - | - | - | - |
| Sunset | - | - | - | - | 6:22 | - | - | - | - | - | - | - | 6:22 | - | - | - | - | - | - | - | 6:22 | - | - | - |
 |  | | | |  |  | | |  | | | | | | | | | | | | | | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 21 | 21 | 23 | 23 | 22 | 21 | 21 | 21 | 21 | 21 | 23 | 24 | 23 | 21 | 21 | 21 | 21 | 21 | 23 | 24 | 23 | 22 | 21 | 21 |
| Feels °C (?) | 21 | 21 | 24 | 21 | 20 | 19 | 19 | 20 | 21 | 21 | 23 | 23 | 22 | 20 | 21 | 21 | 22 | 22 | 24 | 24 | 22 | 22 | 21 | 21 |
- 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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