Big River surfForecast / CAL – Mendocino County / USA

information circle16 Day Weather and Surf, issued 10 pm Saturday 30 May 2026 PDT
Forecast update in hr  min  s Forecast update imminent
Big River surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Big River sea temperature is
10.7° C
(Which is 1.7°C colder than average for this time of year)

Big River surf forecast from 31 May 2026:

  • Best quality surf: Sunday 31 May, 8AM (local time) - 10ft (3.0m), 9s period, NW swell with cross-offshore winds.
  • Most powerful swell: Sunday 31 May, 8PM (local time) - 10ft (3.0m), 9s period, NW swell with 1,718 kJ wave energy.
  • Next surfable swell (1★+): Sunday 31 May, 8AM (local time) - 10ft (3.0m), 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 Sunday (May 31) at 8AM. The primary swell is predicted to be 3.0m and 9s period with a secondary swell of 2.5m and 10s. Another secondary swell of 0.5m and 21s 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 3.0m 9s and forecast to arrive on Sunday (May 31) 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+) 8AM (Sun 31st May)10ft (3.0m) 9s
Best Surf 8AM (Sun 31st May)10ft (3.0m) 9s
Most Powerful 8PM (Sun 31st May)10ft (3.0m) 9s

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


Updates in  hr  min  s Forecast update imminent

Short Range Forecast

Mostly dry. Very mild (max 13°C on Mon morning, min 7°C on Sat night). Winds decreasing (fresh winds from the NNW on Sat night, calm by Mon night).

Days 5-7 Weather Summary

Mostly dry. Very mild (max 14°C on Wed afternoon, min 9°C on Thu night). Winds increasing (light winds from the NNW on Tue night, fresh winds from the NW by Fri afternoon).

Sunday
31
Monday
1
Tuesday
2
Wednesday
3
Thursday
4
Friday
5
Sat
6
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Rating
(10 max)
3
2
2
4
2
2
3
2
1
3
0
1
3
2
2
3
2
1
2
1
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
2.5
NW
8
3
NW
10
3
NW
9
2.1
NW
9
1
SSW
18
1
SSW
18
1.1
SSW
17
1
SSW
16
1
SSW
16
1
SSW
16
0.9
SSW
16
2.2
NW
6
3
NW
7
2.5
NW
8
3.5
NW
8
3
NW
8
1.3
SSW
18
1.3
SSW
18
1.3
SSW
17
1.2
SSW
16
1.2
SSW
16
Wave Graph
Metric surfscale
Energy kJ
836
1488
1569
703
623
659
742
559
539
525
382
363
844
909
1628
1082
943
943
911
700
683
Wind (km/h)
20
NNW
15
NW
15
NW
10
N
10
WNW
15
NW
5
NNW
15
NW
20
NW
10
NNW
25
NW
35
NW
20
NNW
25
NW
30
NNW
20
NNW
35
NW
35
NW
20
NNW
20
NW
35
NW
cross-off
cross
cross
cross-off
cross-on
cross
glassy
cross
cross
cross-off
cross
cross-off
cross-off
cross
cross-off
cross-off
cross-off
cross-off
cross-off
cross
cross
High Tide
10:53PM1.77m
1:18PM1.18m
11:26PM1.75m
1:59PM1.19m
00:01AM1.73m
2:41PM1.19m
00:37AM1.68m
3:24PM1.19m
1:15AM1.62m
4:08PM1.21m
1:57AM1.54m
4:50PM1.25m
2:45AM1.43m
5:28PM1.31m
Low Tide
6:14AM-0.25m
5:21PM0.85m
6:50AM-0.25m
5:57PM0.87m
7:28AM-0.23m
6:36PM0.90m
8:06AM-0.20m
7:20PM0.92m
8:46AM-0.15m
8:12PM0.93m
9:26AM-0.09m
9:16PM0.92m
10:06AM-0.02m
clear
clear
clear
clear
clear
part cloud
clear
clear
part cloud
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:50
5:50
5:50
5:48
5:48
5:48
5:48
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
8:34
8:34
8:35
8:36
8:37
8:37
8:37
8:37
Temp °C
11
12
12
11
13
12
11
12
12
11
13
14
13
12
12
12
12
12
11
12
12
5
8
8
8
11
9
9
9
9
9
7
7
8
7
7
7
5
6
4
8
6
Swell 1
Height (m)
Direction
Period (s)
1.3
WNW
11
2.5
NW
10
0.8
SSW
20
1.6
NW
10
1.7
NW
10
1.5
WNW
10
1.6
NW
9
1.1
NW
8
1
SSW
16
1
SSW
16
0.9
SSW
16
0.8
SSW
15
0.7
SW
14
0.9
SSW
18
1.3
SSW
19
1
SSW
19
1.3
SSW
18
1.3
SSW
18
1.3
SSW
17
1.2
SSW
16
1.2
SSW
16
Energy kJ
400
1308
500
520
546
448
418
161
539
525
382
283
211
520
1135
750
943
943
911
700
683
Swell 2
Height (m)
Direction
Period (s)
0.4
SSW
22
0.8
SSW
21
0.4
SW
16
0.8
SSW
20
1.2
NNW
10
1.1
NNW
9
1.1
SSW
17
1
SSW
16
0.6
WNW
9
0.2
SSW
22
0.5
WNW
12
0.6
SSW
19
0.7
SSW
18
0.9
W
10
0.1
S
12
0.7
SSW
16
0.1
S
13
0.1
S
13
1.1
WNW
11
0.1
S
12
0.1
S
12
Energy kJ
185
511
66
485
264
176
742
559
49
45
75
251
276
161
3
220
3
3
260
3
3
Swell 3
Height (m)
Direction
Period (s)
0.4
SSW
13
0.3
SSW
13
0.3
SSW
13
0.5
SSW
16
1
SSW
18
1
SSW
18
0.6
NNW
8
0.1
S
12
0.1
SW
22
0.2
S
14
0.5
SSW
19
0.1
S
13
0.5
SSW
21
0.7
SW
15
0.1
S
12
0.1
S
12
Energy kJ
69
32
32
153
623
659
53
3
18
16
214
4
256
217
3
3
Wind waves
Height (m)
Direction
Period (s)
2.5
NW
8
3
NW
10
3
NW
9
2.1
NW
9
1.1
NW
6
1.4
NW
7
2
NW
7
1.4
NW
6
2.2
NW
6
3
NW
7
2.5
NW
8
3.5
NW
8
3
NW
8
2.5
NW
8
3
NW
7
1.4
NW
6
1.3
WNW
10
2.3
NW
6
Energy kJ
836
1488
1569
703
91
200
347
143
363
844
909
1628
1082
886
821
146
347
426
Nearest Offshore or Glassy
Rating
(10 max)
4
4
4
4
3
3
3
2
3
3
2
2
3
4
3
4
3
3
4
3
2
Distance (km)
59
129
304
0
111
59
0
277
82
0
202
304
59
183
304
59
202
304
59
194
277
Best forecast wave conditions in Mendocino County
Rating
(10 max)
4
4
3
4
3
3
4
4
Best forecast wave conditions in United States
Rating
(10 max)
4
4
4
4
4
4
4
3
3
4
3
2
4
4
3
5
4
3
4
3
3
Header Global
Rating
(10 max)
6
5
5
4
5
5
5
6
4
5
4
5
5
4
5
5
9
7
6
6
5
  • 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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