Big River surfForecast / CAL – Mendocino County / USA

information circle48hr Weather and Surf, issued 10 am Tuesday 16 Sep 2025 PDT
Forecast 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
15.3° 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: 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) & DateWave HeightWave 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)

Updates in  hr  min  s Forecast update imminent
Tuesday
16
Wednesday
17
Thursday
18
Fri
19
8AM11AM2PM5PM8PM11PM2AM5AM8AM11AM2PM5PM8PM11PM2AM5AM8AM11AM2PM5PM8PM11PM2AM5AM
Rating
(10 max)
2
1
2
2
2
2
3
2
2
1
1
2
3
3
3
4
4
3
3
3
4
3
3
3
Swell
Height Map
Wave Height (m) & direction (?)
0.7
SSW
0.7
SSW
0.8
SSW
0.7
SSW
0.7
S
0.7
S
1.2
WNW
0.7
S
0.7
S
0.7
S
1.5
NW
1.6
NW
2.1
NW
2.2
NW
2.5
NW
3
NW
3
NW
3
NW
3
NW
3
NW
3
NW
3
NW
2.5
NW
2.5
NW
Period(s) (?)19181818181811171616107778101010101010101010
Wave
Graph
(?)Metric surfscale
Energy kJ (?)371337422329304298305273267264424254492521804160819021850179919241839166815061461
Wind
(km/h)
5
ESE
10
WSW
5
WNW
5
NW
10
NNW
10
N
5
N
5
N
5
NE
15
NW
15
NW
15
NW
10
NNW
10
NNW
15
NNW
10
NNW
5
NNW
10
NW
15
NW
10
NW
0
WSW
5
SSE
10
S
10
S
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
glasscross-
on
glassglasscross-
off
cross-
off
cross-
off
cross-
off
glasscrosscrosscrosscross-
off
cross-
off
cross-
off
cross-
off
cross-
off
crosscrosscrossglasscross-
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
Sunrise6:56-------6:56-------6:58-------
Sunset---7:22-------7:20-------7:19----
clear
part cloud
part cloud
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
cloud
part cloud
clear
part cloud
cloud
cloud
cloud
cloud
cloud
cloud
cloud
cloud
Rain (mm)
------------------------
Temp. °C181917171515151516181818161513131416161615151413
Feels °C (?)181817171414141415161616151411121415141516151311
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
Map placeholder

Eyeball surf reportRecent Eyeball Surf Reports for CAL - Mendocino County

  1. weather stationWind Update 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.

    Big River
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Actual: 37 min ago

3 km/h
WNW
Clean
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