Big River surfForecast / CAL – Mendocino County / USA

information circle48hr Weather and Surf, issued 4 pm Wednesday 20 May 2026 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
9.3° C
(Which is 2.8°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 7PM is: 3.0m 9s primary swell from a Northwest direction and 1.3m 12s secondary swell from a West-northwest direction, 0.5m 16s secondary swell from a Southwest direction (forecast issued at 04:00pm May 20). The wind direction is predicted to be cross-offshore and the swell rating is 4.

Time (PDT) & DateWave HeightWave Period
Morning (20 May)--
Afternoon (20 May)7ft (2.2m)9s
Evening (20 May)10ft (3.0m)9s

Table - waves today at Big River. (Swell directed towards the surf break)


Updates in  hr  min  s Forecast update imminent

Short Range Forecast

Mostly dry. Very mild (max 13°C on Thu morning, min 9°C on Wed night). Wind will be generally light.

Wed
20
Thursday
21
Friday
22
Sat
23
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
8 AM
11 AM
Rating
(10 max)
1
3
4
4
4
3
3
2
2
2
3
3
3
3
3
2
1
2
3
3
2
2
1
0
Swell
Height Map
Height MapHeight MapHeight Map
Height MapHeight MapHeight Map
Height MapHeight MapHeight Map
Height MapHeight MapHeight Map
Wave
Height (m)
Direction
Period (s)
2.1
NW
9
2.5
NW
9
3
NW
9
3
NW
9
2.5
NW
9
2.1
NW
8
1.4
NW
11
1.4
NW
11
1.8
NW
10
2
NW
9
2.2
NW
9
1.6
WNW
11
1.6
WNW
10
2.3
NW
10
2.4
NW
10
2.5
NW
10
2.3
NW
10
2.2
NW
10
2.3
NW
9
2.1
NW
9
2.1
NW
9
1.8
NW
9
1.6
NW
8
1.5
NW
8
Wave Graph
Metric surfscale
Energy kJ
611
931
1342
1215
1224
602
459
433
672
626
764
573
530
964
1111
1178
1026
869
850
718
669
516
358
284
Wind (km/h)
15
NW
10
NW
15
NNW
15
NNW
10
NNW
10
NNW
10
NNW
10
WNW
15
NW
10
NW
0
NW
5
NNW
5
N
0
SSE
10
S
15
SW
15
SW
5
WSW
5
W
5
S
5
S
5
S
5
SSW
15
SW
cross
cross
cross-off
cross-off
cross-off
cross-off
cross-off
cross
cross
cross
glassy
glassy
glassy
glassy
cross-on
on
on
cross-on
glassy
glassy
cross-on
cross-on
cross-on
on
High Tide
4:11PM1.30m
2:30AM1.78m
5:11PM1.34m
3:36AM1.59m
6:06PM1.40m
4:52AM1.41m
Low Tide
8:33PM0.83m
9:56AM-0.36m
9:53PM0.81m
10:52AM-0.21m
11:21PM0.73m
clear
clear
part cloud
clear
clear
clear
clear
part cloud
part cloud
clear
part cloud
part cloud
clear
clear
clear
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
clear
clear
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:56
5:56
5:54
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
8:25
8:25
8:27
8:28
Temp °C
12
12
11
10
9
9
10
13
13
13
11
11
11
11
12
12
12
12
10
9
9
9
10
10
9
9
8
7
6
6
8
11
10
11
11
10
10
10
10
9
9
11
9
8
7
8
9
7
Swell 1
Height (m)
Direction
Period (s)
1.3
WNW
12
1.3
WNW
12
1.3
WNW
12
1.3
WNW
12
0.5
SW
15
1.3
WNW
11
1.8
NW
8
1.8
NW
8
1.8
NW
10
2
NW
9
2.2
NW
9
1.8
NW
9
1.7
NNW
9
2.3
NW
10
2.4
NW
10
2.5
NW
10
2.3
NW
10
2.2
NW
10
2.3
NW
9
2.1
NW
9
2.1
NW
9
1.8
NW
9
1.6
NW
8
1.5
NW
8
Energy kJ
500
429
421
407
112
396
459
433
672
626
764
551
519
964
1111
1178
1026
869
850
718
669
516
358
284
Swell 2
Height (m)
Direction
Period (s)
0.4
SW
16
0.4
SW
16
0.5
SW
16
0.5
SW
15
0.4
S
14
0.4
SW
19
1.4
NW
11
1.4
NW
11
1.4
NW
9
1.2
WNW
11
1.1
NW
10
1.6
WNW
11
1.6
WNW
10
0.5
SW
17
0.5
SW
18
0.5
SW
18
0.5
SW
18
0.5
SW
18
0.5
SW
15
0.7
NW
11
0.7
NW
11
0.9
NW
10
0.8
WNW
10
0.8
WNW
10
Energy kJ
90
89
122
116
57
131
423
423
307
300
248
573
530
147
154
154
154
154
104
115
115
157
130
125
Swell 3
Height (m)
Direction
Period (s)
0.4
S
14
0.4
S
14
0.4
S
14
0.4
S
14
0.4
S
14
0.4
S
13
0.6
SW
19
0.6
SW
19
0.5
SW
19
0.5
SW
15
0.5
SW
15
0.5
SW
15
0.5
SW
15
0.4
S
13
0.5
SW
15
0.5
SW
15
0.5
SW
15
0.5
SW
15
0.4
SSW
18
0.4
SW
14
0.5
SW
15
0.6
SSW
15
0.6
SSW
16
0.6
SW
16
Energy kJ
59
58
57
57
57
56
303
303
184
113
116
116
115
51
109
109
109
109
121
74
109
150
162
201
Wind waves
Height (m)
Direction
Period (s)
2.1
NW
9
2.5
NW
9
3
NW
9
3
NW
9
2.5
NW
9
2.1
NW
8
Energy kJ
611
931
1342
1215
1224
602
Nearest Offshore or Glassy
Rating
(10 max)
1
4
4
4
4
3
3
3
2
4
3
3
3
3
4
3
3
3
3
3
3
3
3
3
Distance (km)
160
29
0
0
0
0
0
111
160
23
0
0
0
0
19
57
57
57
0
0
13
19
19
85
Best forecast wave conditions in Mendocino County
Rating
(10 max)
4
4
4
4
4
4
4
4
4
3
3
4
3
3
3
3
3
3
Best forecast wave conditions in United States
Rating
(10 max)
3
4
4
4
4
4
4
3
3
4
4
4
4
3
4
3
3
3
4
4
4
3
3
3
Header Global
Rating
(10 max)
5
5
5
5
5
5
4
5
4
4
5
7
8
7
6
5
5
6
7
7
8
8
7
6
  • 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

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