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:
Capitola Rivermouth surfForecast / CAL – Santa Cruz / USA
48hr Weather and Surf, issued 9 am Tuesday 16 Dec 2025 PSTForecast update in hr min s Forecast update imminent
Capitola Rivermouth surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Capitola Rivermouth sea temperature is
14.1° C
(Which is 1.3°C warmer than normal for this time of year)How big are the waves at Capitola Rivermouth today?
The current surf forecast for Capitola Rivermouth at 12PM is: 0.3m 13s primary swell from a Southwest direction (forecast issued at 09:00am December 16). An open ocean swell of 1.4m 12s is not directed at the surf break. The wind direction is predicted to be glassy.
| Time (PST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (16 Dec) | 1ft (0.3m) | 13s |
| Afternoon (16 Dec) | 1ft (0.3m) | 13s |
| Evening (16 Dec) | 6ft (1.8m) | 12s |
Table - waves today at Capitola Rivermouth. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Tuesday 16 | Wednesday 17 | Thursday 18 | Fri 19 | |||||||||||||||||||||
| 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 | 4 AM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 16 | 13 | 13 | 13 | 15 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 11 | 11 | 11 | 11 | 10 | 11 | 13 | 12 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 66 | 27 | 27 | 27 | 54 | 956 | 841 | 827 | 734 | 726 | 628 | 628 | 615 | 604 | 604 | 520 | 411 | 323 | 282 | 21 | 196 | 21 | 42 | 39 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- off | glass | glass | glass | cross- off | glass | glass | glass | glass | glass | cross | cross | cross- off | cross- off | glass | off | off | glass | cross | glass | off | cross- off | glass | glass |
High Tide / height (m) | 7:15AM 2.09 | 9:32PM 1.48 | 7:48AM 2.12 | 10:16PM 1.51 | 8:22AM 2.15 | 10:57PM 1.53 | ||||||||||||||||||
Low Tide / height (m) | 2:45PM 0.36 | 1:32AM 1.23 | 3:21PM 0.27 | 2:12AM 1.27 | 3:57PM 0.21 | 2:50AM 1.29 | ||||||||||||||||||
Tuesday 16 | Wednesday 17 | Thursday 18 | Fri 19 | |||||||||||||||||||||
| Sunrise | - | 7:13 | - | - | - | - | - | - | - | 7:13 | - | - | - | - | - | - | - | 7:15 | - | - | - | - | - | - |
| Sunset | - | - | - | 4:52 | - | - | - | - | - | - | - | 4:52 | - | - | - | - | - | - | - | 4:52 | - | - | - | - |
 |  | |  |  |  | | | |  | | | | | | | | | | | | | | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 13 | 16 | 19 | 19 | 16 | 15 | 15 | 15 | 14 | 15 | 19 | 19 | 16 | 13 | 12 | 11 | 11 | 15 | 18 | 18 | 15 | 14 | 14 | 13 |
| Feels °C (?) | 11 | 15 | 19 | 20 | 15 | 15 | 16 | 16 | 14 | 16 | 20 | 19 | 16 | 13 | 12 | 10 | 9 | 13 | 16 | 17 | 14 | 13 | 14 | 13 |
- 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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