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Surf Forecasts:
Big River surfForecast / CAL – Mendocino County / USA
48hr Weather and Surf, issued 9 am Friday 05 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
13.3° C
(Which is slightly warmer than usual)How big are the waves at Big River today?
The current surf forecast for Big River at 2PM is: 1.1m 11s primary swell from a West direction and 0.3m 16s secondary swell from a South-southwest direction, 1.3m 6s secondary swell from a Northwest direction (forecast issued at 09:00am December 05). The wind direction is predicted to be cross-offshore.
| Time (PST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (05 Dec) | 3.5ft (1.0m) | 12s |
| Afternoon (05 Dec) | 3.5ft (1.1m) | 11s |
| Evening (05 Dec) | 3.5ft (1.0m) | 11s |
Table - waves today at Big River. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Friday 05 | Saturday 06 | Sunday 07 | Mon 08 | |||||||||||||||||||||
| 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 | 11 | 11 | 11 | 11 | 11 | 11 | 12 | 14 | 13 | 13 | 16 | 14 | 13 | 12 | 12 | 12 | 12 | 12 | 11 | 11 | 11 | 11 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 289 | 274 | 251 | 297 | 247 | 247 | 291 | 242 | 274 | 596 | 632 | 744 | 1494 | 1536 | 1034 | 712 | 579 | 514 | 593 | 429 | 408 | 408 | 427 | 425 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | off | glass | cross- off | cross- off | cross- off | cross- off | glass | glass | cross- off |
High Tide / height (m) | 10:08AM 2.27 | 12:34AM 1.46 | 10:57AM 2.23 | 1:27AM 1.47 | 11:49AM 2.13 | 2:21AM 1.49 | ||||||||||||||||||
Low Tide / height (m) | 5:32PM -0.55 | 4:49AM 0.91 | 6:22PM -0.51 | 5:46AM 0.93 | 7:13PM -0.41 | |||||||||||||||||||
Friday 05 | Saturday 06 | Sunday 07 | Mon 08 | |||||||||||||||||||||
| Sunrise | - | 7:18 | - | - | - | - | - | - | - | 7:20 | - | - | - | - | - | - | - | 7:20 | - | - | - | - | - | - |
| Sunset | - | - | - | 4:51 | - | - | - | - | - | - | - | 4:51 | - | - | - | - | - | - | - | 4:51 | - | - | - | - |
 |  | | |  | | | | | | | | | | | | |  | | | | | | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 9 | 10 | 12 | 13 | 13 | 12 | 12 | 12 | 11 | 12 | 13 | 12 | 12 | 11 | 11 | 11 | 11 | 12 | 13 | 13 | 13 | 12 | 11 | 11 |
| Feels °C (?) | 7 | 8 | 9 | 11 | 10 | 9 | 10 | 10 | 9 | 10 | 9 | 8 | 9 | 8 | 9 | 8 | 9 | 10 | 10 | 11 | 12 | 11 | 10 | 10 |
- 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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