Big River Surf Break

Lat Long: 39.30° N 123.80° W

Big River Surf Forecast and Surf Report

Issued: 10 am 18 Oct 2026 (local time)

Forecast update in  hr  min

Today's Big River sea temperature is
14.2°C
0.5° 

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 18 Oct 2026:

  • Best quality surf: Sunday 18 Oct, 11PM (local time) - 7.5ft (2.3m), 13s period, WNW swell with cross-offshore winds.
  • Most powerful swell: Tuesday 20 Oct, 8AM (local time) - 10ft (3.0m), 13s period, NW swell with 2,522 kJ wave energy.
  • Next surfable swell (1★+): Sunday 18 Oct, 11PM (local time) - 7.5ft (2.3m), 13s period with WNW 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 18) at 11PM. The primary swell is predicted to be 2.3m and 13s period with a secondary swell of 1.1m and 16s. 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 8AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 6s period and expected on Sunday (Oct 25) at 5AM.

Wave TypeTime (PDT) & Date Wave Height & Period
Next good surf (1 star+)11PM (Sun 18th Oct)7.5ft (2.3m) 13s
Best Surf11PM (Sun 18th Oct)7.5ft (2.3m) 13s
Most Powerful 8AM (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 14°C on Tue morning, min 9°C on Mon morning). Wind will be generally light.

Days 4-6 Weather Summary

Mostly dry. Very mild (max 15°C on Wed morning, min 10°C on Thu night). Wind will be generally light.

Sunday
18
Monday
19
Tuesday
20
Wednesday
21
Thursday
22
Friday
23
Saturday
24
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
4
4
4
4
4
3
2
3
1
2
3
3
3
3
3
2
2
2
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
2.3
WNW
12
2.2
WNW
11
2.2
WNW
13
1.9
NW
12
1.7
WNW
11
1.9
NW
14
2.5
WNW
12
2.4
WNW
12
1.5
WNW
10
1.1
SSW
15
1.1
SSW
16
0.8
SSW
14
1
SSW
15
2.4
NW
7
2.1
NW
8
2.3
NW
9
3
NW
9
2.5
NW
9
1.8
NW
11
1.2
NW
10
1.1
NW
10
Wave Graph
Metric surfscale
Energy kJ
1411
1207
1622
1047
681
1480
2237
1624
494
543
620
247
456
540
539
885
1503
974
749
316
255
Wind (km/h)
15
NW
15
NNW
10
NNW
5
NW
15
NW
0
ENE
5
SSW
10
NNW
5
NE
10
W
10
NNW
5
SSE
10
SW
15
NNW
5
NE
10
NW
10
NW
5
N
5
WNW
10
NW
5
NNE
Wind State
cross
cross-off
cross-off
glassy
cross-off
glassy
glassy
cross-off
off
cross-on
cross-off
cross-on
on
cross-off
glassy
cross
cross
cross-off
cross
cross
cross-off
High Tide
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
10:09AM1.81m
11:02PM1.49m
Low Tide
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
4:42PM0.09m
4:23AM0.50m
clear
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cloud
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part cloud
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clear
part cloud
clear
clear
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
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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7:33
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<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
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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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6:23
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 mm
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Temp °C
12
12
11
11
12
11
14
14
14
15
15
13
14
13
11
12
13
12
15
13
12
Feels °C
9
9
8
10
9
9
12
11
11
14
13
12
13
11
9
10
11
10
13
10
10
  • 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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