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:
Gualala Rivermouth surfForecast / CAL – Mendocino County / USA
48hr Weather and Surf, issued 9 am Saturday 13 Dec 2025 PSTForecast update in hr min s Forecast update imminent
Gualala Rivermouth surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Gualala Rivermouth sea temperature is
13.3° C
(Which is slightly warmer than usual)How big are the waves at Gualala Rivermouth today?
The current surf forecast for Gualala Rivermouth at 1PM is: 1.0m 12s primary swell from a West-northwest direction and 0.3m 12s secondary swell from a South direction (forecast issued at 09:00am December 13). The wind direction is predicted to be glassy and the swell rating is 2.
| Time (PST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (13 Dec) | 3.5ft (1.1m) | 12s |
| Afternoon (13 Dec) | 3.5ft (1.0m) | 12s |
| Evening (13 Dec) | 2.5ft (0.8m) | 12s |
Table - waves today at Gualala Rivermouth. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Saturday 13 | Sunday 14 | Monday 15 | Tue 16 | |||||||||||||||||||||
| 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) (?) | 12 | 12 | 12 | 12 | 11 | 12 | 12 | 12 | 11 | 11 | 11 | 11 | 10 | 10 | 10 | 9 | 9 | 9 | 9 | 9 | 11 | 10 | 12 | 12 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 374 | 311 | 288 | 237 | 156 | 240 | 180 | 171 | 160 | 155 | 149 | 141 | 128 | 123 | 118 | 113 | 81 | 78 | 76 | 76 | 240 | 496 | 913 | 1098 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | glass | glass | glass | glass | off | cross- on | off | off | off | glass | cross- off | glass | glass | glass | off | glass | glass | glass | on | cross- on | cross- on | cross | cross | cross |
High Tide / height (m) | 6:06AM 2.12 | 6:51PM 1.50 | 6:40AM 2.15 | 8:08PM 1.52 | 7:12AM 2.19 | 9:11PM 1.57 | ||||||||||||||||||
Low Tide / height (m) | 1:05PM 0.83 | 11:56PM 1.03 | 1:54PM 0.66 | 12:41AM 1.17 | 2:35PM 0.51 | 1:25AM 1.27 | ||||||||||||||||||
Saturday 13 | Sunday 14 | Monday 15 | Tue 16 | |||||||||||||||||||||
| Sunrise | - | 7:24 | - | - | - | - | - | - | - | 7:24 | - | - | - | - | - | - | - | 7:24 | - | - | - | - | - | - |
| Sunset | - | - | - | 4:52 | - | - | - | - | - | - | - | 4:52 | - | - | - | - | - | - | - | 4:52 | - | - | - | - |
 |  | | | | | | | | |  | |  | | | | | | |  |  | | | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 12 | 14 | 15 | 13 | 12 | 12 | 12 | 12 | 12 | 14 | 15 | 14 | 12 | 13 | 13 | 13 | 14 | 15 | 18 | 18 | 17 | 16 | 16 | 16 |
| Feels °C (?) | 9 | 12 | 13 | 11 | 9 | 10 | 9 | 9 | 9 | 12 | 12 | 12 | 11 | 12 | 10 | 11 | 12 | 12 | 15 | 16 | 16 | 16 | 16 | 16 |
- 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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