Big River Surf Break

Lat Long: 39.30° N 123.80° W

Big River Surf Forecast and Surf Report

Issued: 4 pm 05 Aug 2026 (local time)

Forecast update in  hr  min

Today's Big River sea temperature is
12.1° C
2.1° 

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 6 Aug 2026:

  • Best quality surf: Saturday 8 Aug, 11PM (local time) - 10ft (3.0m), 8s period, NW swell with cross-offshore winds.
  • Most powerful swell: Tuesday 11 Aug, 8PM (local time) - 10ft (3.0m), 9s period, NW swell with 1,664 kJ wave energy.
  • Next surfable swell (1★+): Thursday 6 Aug, 2AM (local time) - 2.5ft (0.8m), 9s 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 Thursday (Aug 06) at 2AM. The primary swell is predicted to be 0.5m and 14s period with a secondary swell of 0.8m and 9s. Another secondary swell of 0.8m and 8s is also forecast. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Big River in the next 16 days are 3.0m 9s and forecast to arrive on Tuesday (Aug 11) 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 (Thu 6th Aug)2.5ft (0.8m) 9s
Best Surf11PM (Sat 8th Aug)10ft (3.0m) 8s
Most Powerful 8PM (Tue 11th Aug)10ft (3.0m) 9s

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


Short Range Forecast

Mostly dry. Very mild (max 16°C on Sat morning, min 11°C on Thu night). Wind will be generally light.

Days 5-7 Weather Summary

Mostly dry. Very mild (max 16°C on Sat afternoon, min 12°C on Sat night). Wind will be generally light.

Wed
5
Thursday
6
Friday
7
Saturday
8
Sunday
9
Monday
10
Tuesday
11
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
0
2
0
0
1
0
1
2
1
2
2
1
3
4
2
3
4
3
3
4
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.1
NW
8
0.8
WNW
9
0.5
SW
13
0.5
SW
13
0.6
SSW
13
0.4
SSW
18
0.5
SSW
19
1.8
NW
7
1.7
NW
8
2.4
NW
8
3
NW
8
2.5
NW
9
3
NW
9
3
NW
9
2.5
NW
9
3
NW
9
3
NW
9
3
NW
9
3
NW
9
3
NW
9
Wave Graph
Metric surfscale
Energy kJ
138
93
88
84
113
126
203
336
320
746
984
987
1274
1312
1055
1242
1255
1312
1445
1385
Wind (km/h)
10
SW
5
ENE
10
WNW
15
NW
5
NW
10
NW
15
NW
10
NNW
15
NW
15
NW
15
NNW
15
NW
15
NW
10
NNW
10
WNW
5
WNW
10
NNW
10
WNW
10
WNW
5
NNE
Wind State
on
glassy
cross
cross
glassy
cross
cross
cross-off
cross
cross
cross-off
cross
cross
cross-off
cross
cross-on
cross-off
cross-on
cross
glassy
High Tide
4:36PM1.77m
6:21AM1.05m
5:27PM1.83m
8:05AM1.07m
6:28PM1.90m
9:23AM1.16m
7:33PM1.98m
10:17AM1.25m
8:36PM2.05m
11:01AM1.34m
9:35PM2.11m
11:39AM1.43m
10:31PM2.12m
Low Tide
11:55PM0.24m
10:33AM0.76m
1:08AM0.09m
11:38AM0.87m
2:15AM-0.07m
12:57PM0.93m
3:14AM-0.21m
2:14PM0.91m
4:05AM-0.31m
3:21PM0.83m
4:52AM-0.35m
4:20PM0.73m
part cloud
part cloud
clear
part cloud
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
part cloud
clear
clear
part cloud
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:18
6:20
6:20
6:22
6:22
6:24
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
8:22
8:22
8:20
8:19
8:17
8:16
8:15
 mm
Temp °C
14
13
15
15
13
15
15
13
16
16
15
16
16
14
16
16
14
15
15
13
Feels °C
12
13
14
13
12
13
13
12
13
13
12
13
13
12
15
14
13
14
13
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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