Big River Surf Break

Lat Long: 39.30° N 123.80° W

Big River Surf Forecast and Surf Report

Issued: 10 am 17 Oct 2026 (local time)

Forecast update in  hr  min

Today's Big River sea temperature is
13.4°C
0.3° 

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 17 Oct 2026:

  • Best quality surf: Saturday 17 Oct, 8PM (local time) - 3.5ft (1.0m), 18s period, SSW swell with cross-offshore winds.
  • Most powerful swell: Tuesday 20 Oct, 5AM (local time) - 10ft (3.0m), 13s period, WNW swell with 3,010 kJ wave energy.
  • Next surfable swell (1★+): Saturday 17 Oct, 8PM (local time) - 3.5ft (1.0m), 18s period with SSW 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 Saturday (Oct 17) at 8PM. The primary swell is predicted to be 1.0m and 18s period with a secondary swell of 0.9m and 11s. Another secondary swell of 2.0m and 7s 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 3.0m 13s and forecast to arrive on Tuesday (Oct 20) at 5AM. Winds are predicted to be cross-offshore at the time the swell arrives.

Wave TypeTime (PDT) & Date Wave Height & Period
Next good surf (1 star+) 8PM (Sat 17th Oct)3.5ft (1.0m) 18s
Best Surf 8PM (Sat 17th Oct)3.5ft (1.0m) 18s
Most Powerful 5AM (Tue 20th Oct)10ft (3.0m) 13s

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


Short Range Forecast

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

Days 4-6 Weather Summary

Mostly dry. Very mild (max 15°C on Wed morning, min 9°C on Thu morning). Wind will be generally light.

Saturday
17
Sunday
18
Monday
19
Tuesday
20
Wednesday
21
Thursday
22
Friday
23
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
2
3
4
2
2
4
3
4
4
3
3
3
2
2
2
3
3
4
4
4
4
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.9
SSW
18
1
SSW
18
1.6
WNW
12
2.3
WNW
12
2.3
WNW
11
2.4
WNW
13
1.9
NW
12
1.7
WNW
11
2.5
NW
14
2.5
WNW
12
2.2
WNW
11
1.6
NW
10
1.1
SSW
15
1.1
SSW
16
0.8
SSW
14
1.1
NW
18
1.6
NW
16
1.9
NW
14
2.3
NW
13
2.4
NW
8
3
NW
11
Wave Graph
Metric surfscale
Energy kJ
525
596
713
1411
1338
1828
1029
681
2448
2004
1230
517
543
628
247
694
1314
1378
1791
762
1740
Wind (km/h)
10
NW
15
NNW
10
NNW
15
NW
15
NW
10
NNW
10
NW
10
NNW
5
NNE
5
WSW
10
NW
10
ENE
10
SW
10
NW
5
ENE
10
NW
20
NNW
5
NNE
5
WNW
15
NNW
0
ENE
Wind State
cross
cross-off
cross-off
cross
cross
cross-off
cross
cross-off
glassy
on
cross
off
on
cross
glassy
cross
cross-off
off
glassy
cross-off
glassy
High Tide
3:41PM1.48m
7:20AM1.26m
4:55PM1.42m
8:01AM1.32m
6:13PM1.40m
8:30AM1.39m
7:22PM1.41m
8:55AM1.48m
8:23PM1.43m
9:19AM1.58m
9:18PM1.45m
9:43AM1.69m
10:10PM1.48m
Low Tide
9:53AM1.08m
11:31PM0.21m
11:27AM1.06m
00:30AM0.23m
12:49PM0.98m
1:21AM0.24m
1:51PM0.85m
2:04AM0.25m
2:39PM0.69m
2:41AM0.28m
3:21PM0.50m
3:15AM0.34m
4:01PM0.29m
3:49AM0.41m
clear
clear
clear
part cloud
part cloud
part cloud
cloud
cloud
cloud
cloud
part cloud
part cloud
cloud
part cloud
clear
clear
part cloud
clear
clear
clear
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:26
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7:26
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7:28
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7:28
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7:30
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7:31
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7:31
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<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
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6:32
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—
6:31
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—
6:30
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—
6:29
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6:28
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6:25
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6:24
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 mm
—
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—
—
—
—
—
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—
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—
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Temp °C
18
16
13
12
12
11
12
13
13
14
14
12
15
14
13
12
13
11
12
12
10
Feels °C
14
12
12
9
9
8
10
10
12
12
11
10
12
11
12
10
10
9
11
9
8
  • 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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