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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 Thursday 21 May 2026 PDTForecast 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
9.1° C
(Which is 3.1°C colder than average for this time of year)How big are the waves at Big River today?
The current surf forecast for Big River at 10AM is: 2.1m 9s primary swell from a Northwest direction and 1.8m 8s secondary swell from a Northwest direction, 1.2m 11s secondary swell from a Northwest direction (forecast issued at 04:00am May 21). The wind direction is predicted to be cross-shore.
| Time (PDT) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (21 May) | 7ft (2.1m) | 9s |
| Afternoon (21 May) | 7ft (2.1m) | 10s |
| Evening (21 May) | 7ft (2.2m) | 9s |
Table - waves today at Big River. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastMostly dry. Very mild (max 13°C on Thu morning, min 9°C on Fri night). Wind will be generally light. | ||||||||||||||||||||||||
Thursday 21 | Friday 22 | Saturday 23 | ||||||||||||||||||||||
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 | |
Swell Height Map |    |    |    | |||||||||||||||||||||
NW 8 | NW 8 | NW 9 | NW 8 | NW 10 | NW 9 | NW 9 | NW 10 | NW 10 | NNW 10 | NW 10 | NW 10 | NW 10 | NW 10 | NW 9 | NW 9 | NW 9 | NW 9 | NW 8 | NW 8 | NW 8 | SW 16 | SW 16 | SW 16 | |
624 | 640 | 680 | 443 | 800 | 729 | 669 | 964 | 667 | 490 | 1047 | 1178 | 1115 | 948 | 904 | 718 | 781 | 465 | 341 | 284 | 203 | 258 | 258 | 258 | |
Wind (km/h) | ||||||||||||||||||||||||
cross-off | cross-off | cross-off | cross | cross | cross | glassy | glassy | glassy | glassy | cross-on | on | on | cross-on | glassy | glassy | glassy | cross | cross-on | on | on | cross-on | cross | glassy | |
High Tide | 2:30AM1.78m | 5:11PM1.34m | 3:36AM1.59m | 6:06PM1.40m | 4:52AM1.41m | 6:55PM1.49m | ||||||||||||||||||
Low Tide | 9:56AM-0.36m | 9:53PM0.81m | 10:52AM-0.21m | 11:21PM0.73m | 11:48AM-0.05m | |||||||||||||||||||
 | |  |  | | | |  | | | | | | | | | | | | | | | | | |
 | — | 5:56 | — | — | — | — | — | — | — | 5:56 | — | — | — | — | — | — | — | 5:54 | — | — | — | — | — | — |
 | — | — | — | — | — | — | 8:25 | — | — | — | — | — | — | — | 8:27 | — | — | — | — | — | — | — | 8:28 | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Temp °C | 10 | 9 | 10 | 13 | 13 | 13 | 11 | 10 | 11 | 12 | 12 | 12 | 12 | 12 | 11 | 10 | 10 | 9 | 11 | 11 | 11 | 11 | 10 | 9 |
7 | 6 | 7 | 11 | 10 | 11 | 10 | 9 | 10 | 11 | 10 | 9 | 9 | 11 | 11 | 9 | 9 | 7 | 10 | 8 | 8 | 9 | 9 | 9 | |
Swell 1 Height (m) Direction Period (s) | WNW 11 | WNW 11 | NW 8 | NW 8 | NW 10 | NW 9 | NW 9 | NW 10 | NW 10 | NNW 10 | NW 10 | NW 10 | NW 10 | NW 10 | NW 9 | NW 9 | NW 9 | NW 9 | NW 8 | NW 8 | NW 8 | NW 8 | NW 8 | NW 8 |
 kJ | 533 | 396 | 505 | 443 | 800 | 729 | 669 | 964 | 667 | 490 | 1047 | 1178 | 1115 | 948 | 904 | 718 | 781 | 465 | 341 | 284 | 182 | 145 | 131 | 108 |
Swell 2 Height (m) Direction Period (s) | SW 15 | SW 19 | NW 11 | NW 11 | SW 19 | NW 11 | WNW 10 | SW 15 | WNW 11 | WNW 10 | SW 18 | SW 18 | SW 18 | SW 18 | SW 15 | WNW 11 | SW 15 | NW 10 | NW 10 | WNW 10 | WNW 10 | WNW 10 | WNW 10 | WNW 10 |
| kJ | 112 | 131 | 341 | 341 | 184 | 176 | 189 | 116 | 300 | 462 | 154 | 154 | 154 | 154 | 104 | 143 | 109 | 154 | 142 | 125 | 168 | 122 | 122 | 120 |
Swell 3 Height (m) Direction Period (s) | S 14 | S 13 | SW 19 | SW 19 | SW 15 | SW 15 | SW 15 | S 13 | SW 15 | SW 17 | SW 15 | SW 15 | SW 15 | SW 15 | SW 18 | SW 14 | S 12 | SSW 15 | SSW 16 | SW 16 | SW 16 | SW 16 | SW 16 | SW 16 |
| kJ | 57 | 56 | 303 | 303 | 113 | 113 | 116 | 53 | 115 | 147 | 109 | 109 | 109 | 109 | 152 | 103 | 48 | 150 | 162 | 201 | 203 | 258 | 258 | 258 |
Wind waves Height (m) Direction Period (s) | NW 8 | NW 8 | NW 9 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | 624 | 640 | 680 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 202 | 160 | 23 | 0 | 0 | 0 | 0 | 19 | 57 | 57 | 82 | 0 | 0 | 0 | 7 | 7 | 85 | 84 | 84 | 13 | 0 |
Best forecast wave conditions in Mendocino County | ||||||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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