Big River Surf Break

Lat Long: 39.30° N 123.80° W

Big River 48 hour detailed Surf Forecast

Issued: 4 am 31 Aug 2026 (local time)

Forecast update in  hr  min

Today's Big River sea temperature is
12.8°C
2.0° 

Big River surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


How big are the waves at Big River today (31 Aug):

  • Morning surf: Morning surf (31 Aug, local time) - 3.5ft (1.0m), 14s period with SSW swell.
  • Afternoon surf: Afternoon surf (31 Aug, local time) - 3ft (0.9m), 14s period with SSW swell.
  • Evening surf: Evening surf (31 Aug, local time) - 2.5ft (0.8m), 14s period with SSW swell.

The current surf forecast for Big River at 11AM is: 1.0m 14s primary swell from a South-southwest direction and 1.3m 7s secondary swell from a Northwest direction (forecast issued at 04:00am August 31). The wind direction is predicted to be cross-onshore.

Time (PDT) & DateWave HeightWave Period
Morning (31 Aug)3.5ft (1.0m)14s
Afternoon (31 Aug)3ft (0.9m)14s
Evening (31 Aug)2.5ft (0.8m)14s

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


Short Range Forecast

Some drizzle, heaviest during Wed night. Very mild (max 17°C on Wed morning, min 11°C on Mon morning). Wind will be generally light.

Monday
31
Tuesday
1
Wednesday
2
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)
4
3
2
1
1
1
2
2
2
2
2
0
0
1
0
2
2
2
1
0
0
0
1
1
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
2.1
NW
8
1.8
NW
8
1
SSW
14
1
SSW
14
1
SSW
14
0.9
SSW
14
0.8
SSW
14
0.8
SSW
14
0.8
SSW
13
0.8
SSW
13
0.8
SSW
13
0.8
SSW
13
0.8
SSW
13
0.8
SSW
13
0.7
SSW
13
1
NW
10
0.7
SSW
13
0.7
SSW
13
0.6
SW
18
0.6
SW
18
1
WNW
9
1
WNW
9
1
WNW
8
0.6
SSW
16
Wave Graph
Metric surfscale
Energy kJ
539
400
400
394
394
321
229
217
204
201
198
198
198
198
163
184
151
154
252
246
165
157
137
175
Wind (km/h)
5
N
5
N
5
NNE
10
WNW
15
NW
10
NW
10
NNW
5
NE
5
E
10
E
5
SE
10
SSW
10
SSW
10
SSW
10
S
10
ESE
10
ESE
10
ESE
10
SE
20
SSW
20
SSW
15
SSW
10
SSE
10
SE
Wind State
glassy
cross-off
glassy
cross-on
cross
cross
cross-off
glassy
cross-off
cross-off
glassy
cross-on
on
on
cross-on
cross-off
cross-off
cross-off
cross
cross-on
on
on
cross
cross
High Tide
1:31AM1.53m
1:48PM1.75m
2:27AM1.39m
2:22PM1.79m
3:33AM1.25m
3:02PM1.82m
Low Tide
7:23AM0.35m
8:15PM0.26m
7:55AM0.51m
9:11PM0.20m
8:31AM0.67m
10:17PM0.14m
clear
clear
clear
clear
part cloud
part cloud
part cloud
part cloud
cloud
cloud
cloud
cloud
cloud
part cloud
part cloud
clear
part cloud
cloud
part cloud
part cloud
part cloud
part cloud
part cloud
cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:41
6:43
6:43
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:47
7:45
7:44
 mm
Temp °C
11
11
11
14
15
15
15
14
14
14
15
15
16
15
15
15
14
15
15
17
16
15
15
16
Feels °C
10
10
10
13
13
14
14
14
14
13
14
13
14
13
13
14
12
13
13
14
13
13
14
15
  • 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
How to use the Wavefinder 

FREE! Surf-Forecast.com widget for your website

The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Big River surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.


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