Big River Surf Break

Lat Long: 39.30° N 123.80° W

Big River Surf Forecast and Surf Report

Issued: 10 am 10 Oct 2026 (local time)

Forecast update in  hr  min

Today's Big River sea temperature is
13.5°C
0.6° 

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


Big River surf forecast from 10 Oct 2026:

  • Best quality surf: Sunday 11 Oct, 8PM (local time) - 13ft (4.0m), 10s period, NW swell with cross-offshore winds.
  • Most powerful swell: Sunday 11 Oct, 5PM (local time) - 13ft (4.0m), 10s period, NW swell with 3,248 kJ wave energy.
  • Next surfable swell (1★+): Sunday 11 Oct, 8AM (local time) - 11ft (3.5m), 10s period with NW swell.

Best Forecast Surf Conditions for Big River this week:

The surf forecast for Big River over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Sunday (Oct 11) at 8AM. The primary swell is predicted to be 3.5m and 10s period with a secondary swell of 1.0m and 17s. Another secondary swell of 0.6m and 16s is also forecast. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Big River in the next 16 days are 4.0m 10s and forecast to arrive on Sunday (Oct 11) at 5PM. Winds are predicted to be cross-shore at the time the swell arrives.

Wave TypeTime (PDT) & Date Wave Height & Period
Next good surf (1 star+) 8AM (Sun 11th Oct)11ft (3.5m) 10s
Best Surf 8PM (Sun 11th Oct)13ft (4.0m) 10s
Most Powerful 5PM (Sun 11th Oct)13ft (4.0m) 10s

Table - best surf conditions forecast for Big River over the next 16 days.


Short Range Forecast

Mostly dry. Very mild (max 15°C on Sun afternoon, min 9°C on Sun morning). Winds decreasing (strong winds from the NW on Sat afternoon, calm by Mon night).

Days 4-6 Weather Summary

Mostly dry. Very mild (max 18°C on Thu morning, min 10°C on Tue morning). Wind will be generally light.

Saturday
10
Sunday
11
Monday
12
Tuesday
13
Wednesday
14
Thursday
15
Friday
16
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
3
1
3
4
2
4
3
3
4
3
2
4
2
2
3
2
2
3
2
1
3
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
3
NW
9
4
NW
9
3.5
NW
10
3
NW
10
4
NW
10
3
NW
10
1.5
WNW
18
1.5
WNW
16
1.5
WNW
16
1.4
WNW
14
1.4
WNW
14
1.4
WNW
14
1.2
SSW
16
1.2
SSW
16
1.1
SSW
15
1.5
NW
12
1.6
NW
12
1
SSW
15
1.4
NW
12
0.9
SSW
15
0.9
SSW
20
Wave Graph
Metric surfscale
Energy kJ
1467
2928
2192
1915
3248
2018
1309
1122
1054
774
774
763
679
697
498
678
694
422
488
309
544
Wind (km/h)
25
NNW
45
NW
25
NNW
15
NW
15
NW
10
ENE
5
SSW
10
NW
5
ENE
5
WNW
15
NW
5
NNE
5
W
10
NW
5
NNE
5
W
5
NW
5
NNE
10
WNW
10
NW
10
N
Wind State
cross-off
cross-off
cross-off
cross-off
cross
off
cross-on
cross
cross-off
cross-on
cross
off
cross-on
cross
off
cross-on
cross
off
cross-on
cross
cross-off
High Tide
11:19AM1.85m
00:12AM1.51m
11:48AM1.86m
1:01AM1.45m
12:17PM1.84m
1:52AM1.38m
12:47PM1.80m
2:47AM1.31m
1:20PM1.73m
3:48AM1.25m
1:57PM1.65m
5:00AM1.22m
2:42PM1.56m
Low Tide
5:49PM0.04m
5:36AM0.52m
6:30PM-0.03m
6:09AM0.66m
7:10PM-0.04m
6:42AM0.78m
7:53PM-0.02m
7:16AM0.89m
8:39PM0.04m
7:54AM0.98m
9:30PM0.11m
8:42AM1.04m
10:29PM0.17m
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
clear
clear
clear
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:18
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7:20
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7:20
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7:22
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7:22
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7:24
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7:24
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<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
—
6:44
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—
6:42
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—
6:40
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—
6:38
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—
6:37
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6:36
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6:35
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 mm
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
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Temp °C
13
14
13
13
15
13
15
14
12
13
13
12
15
14
15
18
17
17
20
17
16
Feels °C
8
6
5
9
11
10
13
12
11
11
10
10
12
12
12
15
15
14
17
14
13
  • 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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Information about the Big River Surf forecast

The above surf forecast table for Big River provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Big River can be found by selecting the local surf guide option on the grey menu. Our Big River surf forecast is unique since it includes wave energy (power) that defines the real feel of the surf rather than just the height or the period. If you surf the same spot (Big River) regularly then make a mental note of the wave energy from the surf forecast table each time you go. Very soon you may start to choose your surf days based on the wave energy alone combined with our forecast of favourable offshore wind conditions. Our star ratings will help here and of course you will also find the usual wave height and period predictions on our surf forecasts as well as a full break down of the swell components under our advanced users option (to reveal that, click the little Einstein character under the tide times).

Further information to help with frequently asked questions about our surf forecast for Big River may be found under the help tab on the top menu and also by moving your mouse over the question marks on the surf forecast table itself. Please always bear in mind that the forecast is for near-shore open water and local factors at each surf break influence the actual breaking wave height, such as the beach / reef profile, water depths offshore and shelter.

Big River is 54 km (34 miles) from Ukiah. If you plan a vacation in Mendocino County, look for hotels and other accommodation in Ukiah. Ukiah has rooms for a wide range of budgets as well as car hire and transport links.

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