Big River Surf Break

Lat Long: 39.30° N 123.80° W

Big River Surf Forecast and Surf Report

Issued: 4 am 10 Aug 2026 (local time)

Forecast update in  hr  min

Today's Big River sea temperature is
13.2° C
1.1° 

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 Aug 2026:

  • Best quality surf: Tuesday 11 Aug, 2AM (local time) - 8ft (2.5m), 9s period, NW swell with cross-offshore winds.
  • Most powerful swell: Tuesday 11 Aug, 2AM (local time) - 8ft (2.5m), 9s period, NW swell with 1,011 kJ wave energy.
  • Next surfable swell (1★+): Monday 10 Aug, 8PM (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 Monday (Aug 10) at 8PM. The primary swell is predicted to be 2.4m and 9s period with a secondary swell of 0.5m and 14s. Another secondary swell of 0.4m and 20s 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 2.5m 9s and forecast to arrive on Tuesday (Aug 11) at 2AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 6s period and expected on Sunday (Aug 16) at 11PM.

Wave TypeTime (PDT) & Date Wave Height & Period
Next good surf (1 star+) 8PM (Mon 10th Aug)8ft (2.4m) 9s
Best Surf 2AM (Tue 11th Aug)8ft (2.5m) 9s
Most Powerful 2AM (Tue 11th Aug)8ft (2.5m) 9s

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


Short Range Forecast

Mostly dry. Very mild (max 15°C on Wed morning, min 11°C on Mon night). Wind will be generally light.

Days 4-6 Weather Summary

Mostly dry. Very mild (max 14°C on Thu morning, min 12°C on Thu morning). Wind will be generally light.

Monday
10
Tuesday
11
Wednesday
12
Thursday
13
Friday
14
Saturday
15
Sunday
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)
2
2
4
2
2
3
3
2
3
1
2
2
0
1
3
2
1
3
2
1
2
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
2.2
NW
9
2.2
NW
9
2.5
NW
9
2.1
NW
9
2.1
NW
9
2.3
NW
8
2.5
NW
9
2.3
NW
8
2.3
NW
8
2.1
NW
9
1.8
NW
8
1.6
NW
8
1.4
NW
8
1.4
NW
8
0.8
SSW
18
1
SSW
17
1
SSW
16
1.1
SSW
16
1.1
SSW
16
1.1
SSW
16
0.9
SSW
14
Wave Graph
Metric surfscale
Energy kJ
698
698
1011
639
671
645
951
675
719
625
457
324
239
239
360
563
499
627
612
596
330
Wind (km/h)
10
WNW
10
WNW
5
NNW
10
WNW
10
WNW
15
NNW
15
NW
15
NW
5
NNW
10
WSW
10
WNW
0
SE
15
SW
5
WNW
0
SE
10
W
10
WNW
5
SE
10
SW
15
NW
5
ENE
Wind State
cross
cross
cross-off
cross-on
cross
cross-off
cross
cross
glassy
on
cross-on
glassy
on
cross-on
glassy
cross-on
cross
glassy
on
cross
glassy
High Tide
11:01AM1.34m
9:35PM2.11m
11:39AM1.43m
10:31PM2.12m
12:16PM1.52m
11:23PM2.07m
12:51PM1.60m
00:13AM1.95m
1:26PM1.67m
1:04AM1.79m
2:02PM1.71m
1:57AM1.60m
2:37PM1.73m
2:54AM1.40m
Low Tide
3:21PM0.83m
4:52AM-0.35m
4:20PM0.73m
5:35AM-0.34m
5:15PM0.62m
6:15AM-0.27m
6:09PM0.52m
6:53AM-0.14m
7:02PM0.45m
7:30AM0.03m
7:56PM0.39m
8:05AM0.23m
8:52PM0.36m
clear
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<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:22
6:24
6:24
6:24
6:26
6:26
6:28
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
8:16
8:15
8:14
8:13
8:12
8:10
8:08
 mm
Temp °C
14
14
12
14
14
13
15
15
13
14
14
13
13
14
12
13
13
12
13
14
13
Feels °C
12
12
11
12
12
11
13
12
12
12
13
13
11
13
11
12
11
11
12
12
12
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
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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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