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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 4 am Tuesday 16 Sep 2025 PDT
How big are the waves at Big River today?
The current surf forecast for Big River at 9AM is: 0.7m 19s primary swell from a South-southwest direction and 0.9m 9s secondary swell from a West-northwest direction, 0.7m 7s secondary swell from a Northwest direction (forecast issued at 04:00am 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 | ||||||||||||||||||||||
| 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 | 8 AM | 11 AM | 2 PM | 5 PM | 8 PM | 11 PM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    | |||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 20 | 19 | 19 | 18 | 18 | 18 | 18 | 18 | 11 | 17 | 16 | 10 | 10 | 16 | 7 | 7 | 8 | 10 | 10 | 10 | 10 | 10 | 10 | 10 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 196 | 292 | 371 | 337 | 422 | 329 | 304 | 298 | 305 | 273 | 267 | 320 | 415 | 254 | 492 | 492 | 664 | 1541 | 1864 | 2026 | 1975 | 1979 | 1979 | 1803 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | glass | glass | glass | cross- on | cross- on | cross | 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 |
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) | 1:47AM -0.05 | 1:22PM 0.94 | 2:45AM -0.06 | 2:33PM 0.83 | 3:34AM -0.05 | 3:29PM 0.69 | ||||||||||||||||||
Tuesday 16 | Wednesday 17 | Thursday 18 | ||||||||||||||||||||||
| Sunrise | - | - | 6:56 | - | - | - | - | - | - | - | 6:56 | - | - | - | - | - | - | - | 6:58 | - | - | - | - | - |
| Sunset | - | - | - | - | - | 7:22 | - | - | - | - | - | - | - | 7:20 | - | - | - | - | - | - | - | 7:19 | - | - |
 | |  | |  | | | | | | | | | | | |  | |  | | | |  | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 18 | 18 | 18 | 19 | 17 | 17 | 16 | 15 | 15 | 15 | 16 | 18 | 18 | 17 | 16 | 15 | 13 | 13 | 14 | 16 | 16 | 16 | 15 | 15 |
| Feels °C (?) | 18 | 18 | 18 | 18 | 17 | 17 | 15 | 14 | 14 | 14 | 15 | 16 | 16 | 15 | 16 | 14 | 11 | 11 | 13 | 14 | 14 | 15 | 16 | 15 |
- 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). 1.1m 9s swell from the NW with a 0.6m 16s long period groundswell from the S and a 0.4m 15s groundswell from the SSW. 3 swells combining to make bigger set waves.
Actual: 22 min ago
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