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 am Monday 15 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
28.6° C
(Which is slightly warmer than usual)How big are the waves at Damas Rivermouth today?
The current surf forecast for Damas Rivermouth at 12PM is: 1.0m 6s primary swell from a South-southwest direction and 0.4m 15s secondary swell from a Southwest direction (forecast issued at 05:00am December 15). The wind direction is predicted to be glassy.
| Time (CST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (15 Dec) | 3.5ft (1.0m) | 7s |
| Afternoon (15 Dec) | 1.5ft (0.4m) | 15s |
| Evening (15 Dec) | 3.5ft (1.0m) | 6s |
Table - waves today at Damas Rivermouth. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Monday 15 | Tuesday 16 | Wednesday 17 | Thu 18 | |||||||||||||||||||||
| 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 | 3 PM | 6 PM | 9 PM | 0 AM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 7 | 7 | 7 | 15 | 15 | 6 | 6 | 6 | 16 | 6 | 13 | 13 | 13 | 13 | 14 | 15 | 15 | 15 | 15 | 15 | 12 | 12 | 13 | 13 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 83 | 85 | 83 | 78 | 78 | 75 | 75 | 75 | 91 | 73 | 98 | 95 | 53 | 63 | 74 | 134 | 134 | 104 | 75 | 75 | 39 | 55 | 84 | 109 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross | glass | off | glass | on | cross | cross- off | cross- off | cross- off | cross- off | glass | glass | on | cross- on | cross- off | cross- off | cross- off | cross- off | glass | on | on | glass | glass | glass |
High Tide / height (m) | 11:27AM 2.00 | 11:41PM 2.28 | 12:21PM 2.04 | 12:29AM 2.32 | 1:09PM 2.10 | |||||||||||||||||||
Low Tide / height (m) | 5:21AM 0.71 | 5:24PM 0.83 | 6:12AM 0.65 | 6:15PM 0.81 | 6:59AM 0.57 | 7:03PM 0.75 | ||||||||||||||||||
Monday 15 | Tuesday 16 | Wednesday 17 | Thu 18 | |||||||||||||||||||||
| Sunrise | - | 5:43 | - | - | - | - | - | - | - | 5:45 | - | - | - | - | - | - | - | 5:46 | - | - | - | - | - | - |
| Sunset | - | - | - | - | 5:19 | - | - | - | - | - | - | - | 5:20 | - | - | - | - | - | - | - | 5:20 | - | - | - |
 |  | | | | | |  |  |  |  | | | | | | |  | | | | | | | |
Rain (mm) | 2 | 5 | 2 | 1 | 1 | 2 | 1 | 1 | - | - | - | - | - | 1 | - | 1 | - | - | - | - | - | - | - | - |
| Temp. °C | 25 | 25 | 25 | 27 | 27 | 25 | 25 | 24 | 23 | 23 | 26 | 26 | 27 | 26 | 25 | 24 | 24 | 24 | 26 | 27 | 27 | 26 | 26 | 25 |
| Feels °C (?) | 29 | 29 | 29 | 31 | 30 | 29 | 29 | 27 | 24 | 24 | 29 | 30 | 30 | 30 | 28 | 26 | 26 | 26 | 29 | 29 | 30 | 30 | 30 | 29 |
- 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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