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:
Big River surfForecast / CAL – Mendocino County / USA
48hr Weather and Surf, issued 3 pm Tuesday 16 Dec 2025 PSTForecast update in hr min s Forecast update imminent
Big River surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Big River sea temperature is
13.1° C
(Which is slightly warmer than usual)How big are the waves at Big River today?
The current surf forecast for Big River at 6PM is: 2.1m 12s primary swell from a West direction and 0.7m 12s secondary swell from a Northwest direction, 0.4m 3s secondary swell from a South direction (forecast issued at 03:00pm December 16). The wind direction is predicted to be cross-onshore.
| Time (PST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (16 Dec) | - | - |
| Afternoon (16 Dec) | 7ft (2.2m) | 12s |
| Evening (16 Dec) | 7ft (2.1m) | 12s |
Table - waves today at Big River. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Tuesday 16 | Wednesday 17 | Thursday 18 | Friday 19 | |||||||||||||||||||||
| 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 | 4 AM | 7 AM | 10 AM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 11 | 11 | 11 | 11 | 11 | 10 | 10 | 10 | 10 | 11 | 11 | 11 | 11 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 1447 | 1321 | 1204 | 1236 | 1236 | 1378 | 1472 | 1344 | 1321 | 997 | 1040 | 1193 | 1279 | 1148 | 688 | 748 | 842 | 712 | 486 | 925 | 1167 | 1375 | 1612 | 1945 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- on | cross- on | cross- on | cross- on | cross- on | on | cross- on | cross | cross | cross- off | cross- off | glass | glass | glass | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | cross | cross | cross- on | cross- on |
High Tide / height (m) | 10:18PM 1.24 | 8:31AM 1.86 | 11:03PM 1.28 | 9:05AM 1.88 | 11:41PM 1.31 | 9:40AM 1.89 | ||||||||||||||||||
Low Tide / height (m) | 3:20PM 0.03 | 2:15AM 0.95 | 3:56PM -0.06 | 2:56AM 0.99 | 4:31PM -0.12 | 3:35AM 1.01 | ||||||||||||||||||
Tuesday 16 | Wednesday 17 | Thursday 18 | Friday 19 | |||||||||||||||||||||
| Sunrise | - | - | - | - | - | - | - | 7:28 | - | - | - | - | - | - | - | 7:28 | - | - | - | - | - | - | - | 7:30 |
| Sunset | - | 4:52 | - | - | - | - | - | - | - | 4:52 | - | - | - | - | - | - | - | 4:52 | - | - | - | - | - | - |
 | |  | | | | |  | | |  | | |  | |  | | | | | | | | | |
Rain (mm) | 3 | 3 | 3 | 3 | 2 | 3 | 2 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 3 |
| Temp. °C | 15 | 15 | 15 | 15 | 15 | 14 | 14 | 13 | 12 | 11 | 10 | 10 | 10 | 11 | 12 | 13 | 13 | 14 | 15 | 14 | 13 | 14 | 14 | 14 |
| Feels °C (?) | 14 | 14 | 13 | 12 | 12 | 12 | 13 | 11 | 9 | 7 | 8 | 9 | 9 | 9 | 10 | 10 | 10 | 12 | 14 | 12 | 11 | 12 | 11 | 9 |
- 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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