Big River Surf Break

Lat Long: 39.30° N 123.80° W

Big River Surf Forecast and Surf Report

Issued: 4 pm 31 Jul 2026 (local time)

Forecast update in  hr  min

Today's Big River sea temperature is
13.4° 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 1 Aug 2026:

  • Best quality surf: Monday 3 Aug, 5AM (local time) - 11ft (3.5m), 10s period, NW swell with cross-offshore winds.
  • Most powerful swell: Sunday 2 Aug, 8PM (local time) - 13ft (4.0m), 9s period, NW swell with 2,628 kJ wave energy.
  • Next surfable swell (1★+): Saturday 1 Aug, 2AM (local time) - 6.5ft (2.0m), 7s 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 (Aug 01) at 2AM. The primary swell is predicted to be 2.0m and 7s period with a secondary swell of 0.6m and 14s. Another secondary swell of 0.5m and 12s 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 4.0m 9s and forecast to arrive on Sunday (Aug 02) 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 1st Aug)6.5ft (2.0m) 7s
Best Surf 5AM (Mon 3rd Aug)11ft (3.5m) 10s
Most Powerful 8PM (Sun 2nd Aug)13ft (4.0m) 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 Sat night). Winds increasing (light winds from the N on Fri night, fresh winds from the NNW by Sat afternoon).

Days 5-7 Weather Summary

Mostly dry. Very mild (max 17°C on Mon afternoon, min 12°C on Tue night). Wind will be generally light.

Fri
31
Saturday
1
Sunday
2
Monday
3
Tuesday
4
Wednesday
5
Thursday
6
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
1
2
0
1
3
3
3
4
3
3
4
2
2
3
1
2
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)
1.9
NW
7
2
NW
7
1.9
NW
7
3
NW
8
3
NW
8
3
NW
9
3.5
NW
9
3.5
NW
10
3
NW
10
3
NW
10
3
NW
10
2.5
NW
10
2.3
NW
9
2.2
NW
9
2.3
NW
9
2.3
NW
9
3
NW
9
3
NW
10
3.5
NW
9
3
NW
9
Wave Graph
Metric surfscale
Energy kJ
321
347
335
1103
1220
1475
2166
2046
1665
1801
1460
1108
853
764
868
944
1297
1608
2088
1455
Wind (km/h)
20
NW
10
NNW
20
NW
30
NNW
20
NNW
20
NW
25
NNW
10
N
15
NW
10
WNW
10
NNW
5
W
10
WNW
0
NW
15
SW
15
NW
10
NNW
10
WNW
15
WNW
10
NNW
Wind State
cross
cross-off
cross
cross-off
cross-off
cross-off
cross-off
cross-off
cross
cross
cross-off
cross-on
cross-on
glassy
on
cross
cross-off
cross-on
cross
cross-off
High Tide
00:49AM1.71m
2:17PM1.52m
1:32AM1.59m
2:46PM1.58m
2:22AM1.44m
3:17PM1.65m
3:23AM1.27m
3:53PM1.71m
4:42AM1.13m
4:36PM1.77m
6:21AM1.05m
5:27PM1.83m
Low Tide
6:55PM0.72m
7:34AM-0.00m
7:42PM0.66m
8:04AM0.12m
8:35PM0.58m
8:34AM0.27m
9:34PM0.49m
9:07AM0.43m
10:41PM0.38m
9:45AM0.60m
11:55PM0.24m
10:33AM0.76m
1:08AM0.09m
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
part cloud
part cloud
part cloud
clear
part cloud
part cloud
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:13
6:15
6:16
6:16
6:18
6:18
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
8:28
8:27
8:25
8:24
8:23
8:22
8:22
 mm
Temp °C
14
14
16
16
15
15
16
15
16
17
15
15
16
14
14
15
14
15
15
14
Feels °C
11
12
13
11
11
11
12
11
14
15
14
15
15
14
12
14
14
14
13
14
  • 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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