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Surf Forecasts:
Big River surfForecast / CAL – Mendocino County / USA
48hr Weather and Surf, issued 3 am Sunday 07 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
13.2° C
(Which is slightly warmer than usual)How big are the waves at Big River today?
The current surf forecast for Big River at 10AM is: 1.4m 12s primary swell from a West-northwest direction and 1.3m 11s secondary swell from a Northwest direction (forecast issued at 03:00am December 07). The wind direction is predicted to be cross-offshore and the swell rating is 3.
| Time (PST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (07 Dec) | 4.5ft (1.4m) | 12s |
| Afternoon (07 Dec) | 4.5ft (1.3m) | 12s |
| Evening (07 Dec) | 4.5ft (1.3m) | 11s |
Table - waves today at Big River. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Sunday 07 | Monday 08 | Tuesday 09 | ||||||||||||||||||||||
| 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 | 1 PM | 4 PM | 7 PM | 10 PM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    | |||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 13 | 12 | 12 | 12 | 12 | 11 | 11 | 11 | 11 | 11 | 9 | 9 | 10 | 12 | 13 | 13 | 13 | 12 | 12 | 13 | 13 | 13 | 12 | 12 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 1034 | 712 | 599 | 514 | 521 | 408 | 408 | 408 | 433 | 425 | 210 | 264 | 394 | 355 | 1346 | 1632 | 1817 | 1652 | 1652 | 1734 | 1789 | 1885 | 1890 | 1880 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | glass | off | off | cross- off | cross | cross- off | cross- off | cross- off | off | off | off | cross- off | cross | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off |
High Tide / height (m) | 1:27AM 1.47 | 11:49AM 2.13 | 2:21AM 1.49 | 12:43PM 1.97 | 3:14AM 1.51 | 1:42PM 1.77 | ||||||||||||||||||
Low Tide / height (m) | 5:46AM 0.93 | 7:13PM -0.41 | 6:48AM 0.94 | 8:04PM -0.27 | 7:59AM 0.93 | 8:54PM -0.10 | ||||||||||||||||||
Sunday 07 | Monday 08 | Tuesday 09 | ||||||||||||||||||||||
| Sunrise | - | - | - | 7:20 | - | - | - | - | - | - | - | 7:22 | - | - | - | - | - | - | - | 7:22 | - | - | - | - |
| Sunset | - | - | - | - | - | 4:51 | - | - | - | - | - | - | - | 4:51 | - | - | - | - | - | - | - | 4:51 | - | - |
 |  | |  |  | | | | | | | | | | | | | | | | | | | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 11 | 11 | 12 | 13 | 13 | 13 | 13 | 12 | 12 | 12 | 12 | 12 | 13 | 12 | 12 | 12 | 11 | 11 | 11 | 12 | 14 | 13 | 13 | 13 |
| Feels °C (?) | 9 | 9 | 10 | 11 | 10 | 11 | 12 | 11 | 11 | 10 | 10 | 10 | 10 | 10 | 10 | 11 | 10 | 10 | 10 | 10 | 11 | 10 | 11 | 12 |
- 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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