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:
Damas Rivermouth surfForecast / Golfo de Nicoya / Costa Rica
48hr Weather and Surf, issued 5 pm Friday 12 Dec 2025 CSTForecast update in hr min s Forecast update imminent
Damas Rivermouth surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Damas Rivermouth sea temperature is
28.5° C
(Which is slightly warmer than usual)How big are the waves at Damas Rivermouth today?
The current surf forecast for Damas Rivermouth at 7PM is: 0.9m 7s primary swell from a South-southwest direction and 0.5m 12s secondary swell from a South-southwest direction (forecast issued at 05:00pm December 12). The wind direction is predicted to be cross-offshore.
| Time (CST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (12 Dec) | - | - |
| Afternoon (12 Dec) | 2ft (0.6m) | 12s |
| Evening (12 Dec) | 3ft (0.9m) | 7s |
Table - waves today at Damas Rivermouth. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Friday 12 | Saturday 13 | Sunday 14 | Monday 15 | |||||||||||||||||||||
| 3 PM | 6 PM | 9 PM | 0 AM | 3 AM | 6 AM | 9 AM | 12 PM | 3 PM | 6 PM | 9 PM | 0 AM | 3 AM | 6 AM | 9 AM | 12 PM | 3 PM | 6 PM | 9 PM | 0 AM | 3 AM | 6 AM | 9 AM | 12 PM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 12 | 12 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 16 | 16 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 104 | 75 | 84 | 105 | 108 | 108 | 108 | 105 | 84 | 82 | 82 | 66 | 79 | 79 | 79 | 85 | 85 | 83 | 83 | 85 | 96 | 113 | 113 | 110 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | on | cross | cross- off | glass | glass | cross- off | glass | cross- on | glass | glass | glass | glass | cross- off | cross- off | glass | on | on | glass | glass | glass | glass | cross- off | glass | cross- on |
High Tide / height (m) | 8:57PM 2.36 | 9:22AM 2.07 | 9:54PM 2.31 | 10:26AM 2.01 | 10:49PM 2.28 | 11:27AM 2.00 | ||||||||||||||||||
Low Tide / height (m) | 2:32PM 0.60 | 3:21AM 0.73 | 3:29PM 0.73 | 4:23AM 0.74 | 4:27PM 0.81 | 5:21AM 0.71 | ||||||||||||||||||
Friday 12 | Saturday 13 | Sunday 14 | Monday 15 | |||||||||||||||||||||
| Sunrise | - | - | - | - | - | 5:43 | - | - | - | - | - | - | - | 5:43 | - | - | - | - | - | - | - | 5:43 | - | - |
| Sunset | 5:17 | - | - | - | - | - | - | - | 5:17 | - | - | - | - | - | - | - | 5:19 | - | - | - | - | - | - | - |
 |  | | |  | | |  | | | | | |  | | | | | | | | | | | |
Rain (mm) | - | 2 | 1 | 1 | - | - | - | 1 | 1 | 3 | 1 | - | - | - | - | - | 1 | 2 | 1 | 3 | - | - | - | - |
| Temp. °C | 28 | 26 | 26 | 25 | 25 | 24 | 27 | 27 | 27 | 26 | 25 | 25 | 24 | 23 | 26 | 27 | 27 | 26 | 25 | 25 | 24 | 24 | 26 | 27 |
| Feels °C (?) | 31 | 30 | 30 | 29 | 28 | 26 | 31 | 30 | 31 | 31 | 29 | 29 | 27 | 25 | 29 | 30 | 30 | 31 | 30 | 29 | 28 | 27 | 30 | 30 |
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
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