Big River Surf Break

Lat Long: 39.30° N 123.80° W

Big River Surf Forecast and Surf Report

Issued: 10 am 25 Sep 2026 (local time)

Forecast update in  hr  min

Today's Big River sea temperature is
12.8°C
1.8° 

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 26 Sep 2026:

  • Best quality surf: Monday 28 Sep, 8PM (local time) - 4.5ft (1.4m), 15s period, NW swell with cross-offshore winds.
  • Most powerful swell: Thursday 1 Oct, 8PM (local time) - 16ft (5.0m), 10s period, NW swell with 5,037 kJ wave energy.
  • Next surfable swell (1★+): Saturday 26 Sep, 2AM (local time) - 8ft (2.4m), 9s 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 Saturday (Sep 26) at 2AM. The primary swell is predicted to be 2.4m and 9s period with a secondary swell of 0.6m and 13s. Another secondary swell of 0.5m and 13s 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 5.0m 10s and forecast to arrive on Thursday (Oct 01) at 8PM. 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+) 2AM (Sat 26th Sep)8ft (2.4m) 9s
Best Surf 8PM (Mon 28th Sep)4.5ft (1.4m) 15s
Most Powerful 8PM (Thu 1st Oct)16ft (5.0m) 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 Fri morning, min 10°C on Sun night). Winds decreasing (fresh winds from the NNW on Fri afternoon, calm by Sat morning).

Days 4-6 Weather Summary

Mostly dry. Very mild (max 16°C on Tue afternoon, min 10°C on Mon morning). Winds increasing (light winds from the N on Mon morning, fresh winds from the NNW by Tue afternoon).

Friday
25
Saturday
26
Sunday
27
Monday
28
Tuesday
29
Wednesday
30
Thursday
1
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
2
3
2
2
3
1
0
3
3
2
4
2
2
4
2
3
4
2
3
3
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.9
NW
10
2.5
NW
10
2.4
NW
9
2.2
NW
9
2.2
NW
8
2.1
NW
8
1.7
NW
8
2.3
NW
8
2.1
NW
8
1.1
NW
16
1.4
NW
16
1.6
NW
14
1.6
NW
14
3
NW
8
1.3
NW
13
2.3
NW
8
3.5
NW
9
3.5
NW
10
4
NW
10
5
NW
11
4
NW
11
Wave Graph
Metric surfscale
Energy kJ
692
1339
890
720
681
542
335
617
565
595
883
1016
893
1125
554
613
1988
2169
2988
4972
3472
Wind (km/h)
20
NW
35
NNW
10
N
10
NW
20
NW
5
N
15
NW
25
NW
15
N
10
WNW
20
NW
10
NNW
20
NW
30
NNW
15
N
15
NW
20
NNW
15
N
20
NW
30
NNW
20
NNW
Wind State
cross-off
cross-off
cross-off
cross
cross-off
cross-off
cross
cross
cross-off
cross
cross
cross-off
cross
cross-off
cross-off
cross
cross-off
cross-off
cross
cross-off
cross-off
High Tide
11:05AM1.63m
11:08PM1.65m
11:29AM1.73m
11:54PM1.61m
11:56AM1.81m
00:43AM1.54m
12:26PM1.88m
1:37AM1.46m
1:00PM1.92m
2:38AM1.36m
1:40PM1.92m
3:49AM1.27m
2:27PM1.88m
Low Tide
4:59PM0.37m
5:11AM0.24m
5:40PM0.22m
5:41AM0.34m
6:22PM0.09m
6:13AM0.47m
7:08PM-0.02m
6:47AM0.61m
7:58PM-0.07m
7:25AM0.74m
8:55PM-0.09m
8:08AM0.86m
10:00PM-0.07m
part cloud
clear
clear
cloud
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:05
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7:05
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7:07
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7:07
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7:07
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7:09
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7:09
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<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
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7:07
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7:06
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7:04
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7:02
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7:00
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6:59
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6:58
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 mm
—
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—
—
—
—
—
—
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Temp °C
15
15
14
14
14
12
14
14
12
14
14
12
15
16
15
15
15
13
15
15
14
Feels °C
12
11
9
13
12
10
12
11
9
12
11
10
11
11
10
12
11
10
12
10
9
  • 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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