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Big River Surf Forecast
/ CAL – Mendocino County (14 breaks) / California (404 breaks) /
Surf Forecasts:
Big River surfForecast / CAL – Mendocino County / USA
48hr Weather and Surf, issued 10 am Tuesday 16 Sep 2025 PDT
How big are the waves at Big River today?
The current surf forecast for Big River at 2PM is: 0.8m 18s primary swell from a South-southwest direction and 0.8m 7s secondary swell from a Northwest direction (forecast issued at 10:00am September 16). The wind direction is predicted to be glassy and the swell rating is 2.
| Time (PDT) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (16 Sep) | 2.5ft (0.7m) | 19s |
| Afternoon (16 Sep) | 2.5ft (0.7m) | 18s |
| Evening (16 Sep) | 2.5ft (0.7m) | 18s |
Table - waves today at Big River. (Swell directed towards the surf break)
Tuesday 16 | Wednesday 17 | Thursday 18 | Fri 19 | |||||||||||||||||||||
| 8 AM | 11 AM | 2 PM | 5 PM | 8 PM | 11 PM | 2 AM | 5 AM | 8 AM | 11 AM | 2 PM | 5 PM | 8 PM | 11 PM | 2 AM | 5 AM | 8 AM | 11 AM | 2 PM | 5 PM | 8 PM | 11 PM | 2 AM | 5 AM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 19 | 18 | 18 | 18 | 18 | 18 | 11 | 17 | 16 | 16 | 10 | 7 | 7 | 7 | 8 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 371 | 337 | 422 | 329 | 304 | 298 | 305 | 273 | 267 | 264 | 424 | 254 | 492 | 521 | 804 | 1608 | 1902 | 1850 | 1799 | 1924 | 1839 | 1668 | 1506 | 1461 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | glass | cross- on | glass | glass | cross- off | cross- off | cross- off | cross- off | glass | cross | cross | cross | cross- off | cross- off | cross- off | cross- off | cross- off | cross | cross | cross | glass | cross- on | cross- on | cross- on |
High Tide / height (m) | 9:00AM 1.33 | 7:24PM 1.76 | 9:44AM 1.41 | 8:31PM 1.77 | 10:20AM 1.48 | 9:29PM 1.78 | ||||||||||||||||||
Low Tide / height (m) | 1:22PM 0.94 | 2:45AM -0.06 | 2:33PM 0.83 | 3:34AM -0.05 | 3:29PM 0.69 | 4:15AM -0.01 | ||||||||||||||||||
Tuesday 16 | Wednesday 17 | Thursday 18 | Fri 19 | |||||||||||||||||||||
| Sunrise | 6:56 | - | - | - | - | - | - | - | 6:56 | - | - | - | - | - | - | - | 6:58 | - | - | - | - | - | - | - |
| Sunset | - | - | - | 7:22 | - | - | - | - | - | - | - | 7:20 | - | - | - | - | - | - | - | 7:19 | - | - | - | - |
 |  | | |  | | | | | | | |  |  | | |  | | | | | | | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 18 | 19 | 17 | 17 | 15 | 15 | 15 | 15 | 16 | 18 | 18 | 18 | 16 | 15 | 13 | 13 | 14 | 16 | 16 | 16 | 15 | 15 | 14 | 13 |
| Feels °C (?) | 18 | 18 | 17 | 17 | 14 | 14 | 14 | 14 | 15 | 16 | 16 | 16 | 15 | 14 | 11 | 12 | 14 | 15 | 14 | 15 | 16 | 15 | 13 | 11 |
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
Recent Eyeball Surf Reports for CAL - Mendocino County
Continuing clean conditions at Big River (calm at Mendocino 3 km from Big River). 0.9m 7s swell from the NW with a 0.6m 9s swell from the WNW and a 0.5m 13s groundswell, also from the WNW. 3 swells combining to make bigger set waves.
Actual: 37 min ago
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