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 11 am Thursday 11 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 5PM is: 0.7m 12s primary swell from a South-southwest direction and 0.5m 6s secondary swell from a South direction (forecast issued at 11:00am December 11). The wind direction is predicted to be glassy.
| Time (CST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (11 Dec) | 1.5ft (0.5m) | 13s |
| Afternoon (11 Dec) | 2.5ft (0.7m) | 12s |
| Evening (11 Dec) | 2ft (0.6m) | 12s |
Table - waves today at Damas Rivermouth. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Thursday 11 | Friday 12 | Saturday 13 | Sunday 14 | |||||||||||||||||||||
| 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 | 3 AM | 6 AM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 13 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 6 | 6 | 16 | 16 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 84 | 155 | 155 | 152 | 115 | 113 | 111 | 109 | 107 | 106 | 104 | 84 | 86 | 105 | 105 | 102 | 84 | 82 | 82 | 64 | 60 | 53 | 66 | 66 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | glass | on | on | glass | glass | glass | cross- off | cross- off | glass | on | on | glass | glass | glass | off | glass | glass | on | glass | glass | cross- off | cross- off | cross- off | cross- off |
High Tide / height (m) | 7:21AM 2.36 | 8:01PM 2.45 | 8:20AM 2.19 | 8:57PM 2.36 | 9:22AM 2.07 | 9:54PM 2.31 | ||||||||||||||||||
Low Tide / height (m) | 1:37PM 0.44 | 2:18AM 0.66 | 2:32PM 0.60 | 3:21AM 0.73 | 3:29PM 0.73 | 4:23AM 0.74 | ||||||||||||||||||
Thursday 11 | Friday 12 | Saturday 13 | Sunday 14 | |||||||||||||||||||||
| Sunrise | 5:41 | - | - | - | - | - | - | 5:43 | - | - | - | - | - | - | - | 5:43 | - | - | - | - | - | - | - | 5:43 |
| Sunset | - | - | 5:16 | - | - | - | - | - | - | - | 5:17 | - | - | - | - | - | - | - | 5:17 | - | - | - | - | - |
 | |  |  | |  |  | | | |  | | | | | | | | |  |  | | | | |
Rain (mm) | - | - | 1 | 2 | 1 | 1 | - | - | - | - | - | - | 1 | - | - | - | - | 1 | 2 | - | - | - | - | - |
| Temp. °C | 27 | 28 | 28 | 27 | 26 | 24 | 23 | 23 | 27 | 27 | 27 | 26 | 26 | 25 | 24 | 24 | 27 | 27 | 25 | 25 | 25 | 24 | 24 | 24 |
| Feels °C (?) | 31 | 31 | 32 | 32 | 30 | 27 | 24 | 24 | 31 | 29 | 30 | 30 | 31 | 29 | 27 | 27 | 31 | 30 | 30 | 29 | 29 | 27 | 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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