Using Surf-Forecast’s Historical Surf Data To Find The Most Consistent Waves On Earth
Using our statistical data for 7000 spots dating back to 2006, we can find those waves that break the most, with the best winds.
Surf Forecasts:
Big River surfForecast / CAL – Mendocino County / USA
48hr Weather and Surf, issued 9 am Thursday 18 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
13.0° C
(Which is slightly warmer than usual)How big are the waves at Big River today?
The current surf forecast for Big River at 12PM is: 1.7m 11s primary swell from a West direction and 1.2m 11s secondary swell from a Northwest direction, 0.3m 2s secondary swell from a South direction (forecast issued at 09:00am December 18). The wind direction is predicted to be cross-onshore.
| Time (PST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (18 Dec) | 6ft (1.8m) | 11s |
| Afternoon (18 Dec) | 5ft (1.6m) | 11s |
| Evening (18 Dec) | 7ft (2.1m) | 10s |
Table - waves today at Big River. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Thursday 18 | Friday 19 | Saturday 20 | Sun 21 | |||||||||||||||||||||
| 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) (?) | 11 | 11 | 11 | 11 | 10 | 10 | 10 | 11 | 11 | 11 | 11 | 10 | 11 | 13 | 12 | 12 | 12 | 12 | 12 | 12 | 11 | 11 | 11 | 11 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 785 | 750 | 566 | 507 | 440 | 934 | 1124 | 1400 | 1822 | 2261 | 2221 | 1277 | 1128 | 1053 | 992 | 1188 | 1100 | 1013 | 923 | 907 | 770 | 756 | 770 | 663 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross | cross- on | cross- on | cross | cross- on | cross- on | cross | cross | cross- on | on | on | cross- off | glass | cross- off | cross- off | cross- off | glass | glass | glass | glass | glass | glass | cross- off | cross- on |
High Tide / height (m) | 9:05AM 1.88 | 11:41PM 1.31 | 9:40AM 1.89 | 12:17AM 1.34 | 10:16AM 1.89 | 12:54AM 1.36 | ||||||||||||||||||
Low Tide / height (m) | 4:31PM -0.12 | 3:35AM 1.01 | 5:06PM -0.15 | 4:14AM 1.02 | 5:42PM -0.17 | |||||||||||||||||||
Thursday 18 | Friday 19 | Saturday 20 | Sun 21 | |||||||||||||||||||||
| Sunrise | - | 7:28 | - | - | - | - | - | - | - | 7:30 | - | - | - | - | - | - | - | 7:30 | - | - | - | - | - | - |
| Sunset | - | - | - | 4:52 | - | - | - | - | - | - | - | 4:53 | - | - | - | - | - | - | - | 4:53 | - | - | - | - |
 |  | |  |  | | | |  |  | |  | | | | | | | | | | | | | |
Rain (mm) | - | - | - | - | - | - | - | - | 3 | 10 | 6 | 1 | - | - | - | - | - | - | - | - | 1 | 4 | 3 | - |
| Temp. °C | 11 | 12 | 13 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 13 | 13 | 12 | 11 | 11 | 11 | 12 | 12 | 13 | 13 | 13 | 14 | 14 |
| Feels °C (?) | 9 | 9 | 10 | 11 | 12 | 12 | 12 | 11 | 9 | 10 | 13 | 12 | 12 | 10 | 9 | 10 | 10 | 11 | 11 | 12 | 13 | 14 | 12 | 13 |
- 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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