Big River surfForecast / CAL – Mendocino County / USA

information circle16 Day Weather and Surf, issued 10 am 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
10.6° C
(Which is 1.8°C colder than average for this time of year)

Big River surf forecast from 30 May 2026:

  • Best quality surf: Sunday 31 May, 5AM (local time) - 10ft (3.0m), 9s period, NW swell with cross-offshore winds.
  • Most powerful swell: Sunday 31 May, 5PM (local time) - 10ft (3.0m), 9s period, NW swell with 1,718 kJ wave energy.
  • Next surfable swell (1★+): Sunday 31 May, 5AM (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 5AM. The primary swell is predicted to be 3.0m and 9s period with a secondary swell of 0.5m and 22s. Another secondary swell of 0.4m 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 3.0m 9s and forecast to arrive on Sunday (May 31) at 5PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.8m 6s period and expected on Wednesday (Jun 03) at 8PM.

Wave TypeTime (PDT) & Date Wave Height & Period
Next good surf (1 star+) 5AM (Sun 31st May)10ft (3.0m) 9s
Best Surf 5AM (Sun 31st May)10ft (3.0m) 9s
Most Powerful 5PM (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 8°C on Sat night). Winds decreasing (fresh winds from the NNW on Sat night, calm by Mon night).

Days 4-6 Weather Summary

Mostly dry. Very mild (max 14°C on Wed afternoon, min 10°C on Tue night). Wind will be generally light.

Saturday
30
Sunday
31
Monday
1
Tuesday
2
Wednesday
3
Thursday
4
Friday
5
AM
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
3
2
2
4
3
2
4
1
1
3
1
2
3
2
2
3
2
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)
2.1
NW
8
3
NW
8
2.5
NW
8
3
NW
10
3
NW
9
2.1
NW
9
1.8
NW
10
1
SSW
18
1.1
SSW
17
1
SSW
16
1
SSW
16
1
SSW
16
0.9
SSW
16
0.9
SSW
15
2.4
NW
7
0.9
SSW
18
1.3
SSW
19
1
SSW
19
1.4
SSW
18
1.4
SSW
18
1.4
SSW
17
Wave Graph
Metric surfscale
Energy kJ
567
1303
908
1449
1718
703
623
659
742
559
539
525
382
348
516
520
1135
750
1159
1159
1107
Wind (km/h)
25
NNW
30
NNW
20
NNW
20
NW
15
NW
5
NNW
10
WNW
15
NW
5
N
15
NW
20
NW
15
NNW
20
NW
25
NW
10
NNW
20
NW
25
NW
20
NNW
20
NW
20
NNW
5
NE
cross-off
cross-off
cross-off
cross
cross
cross-off
cross
cross
cross-off
cross
cross
cross-off
cross
cross-off
cross-off
cross
cross
cross-off
cross
cross-off
off
High Tide
12:36PM1.17m
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
Low Tide
4:45PM0.81m
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
clear
clear
clear
clear
clear
clear
clear
part cloud
clear
part cloud
cloud
part cloud
clear
clear
clear
clear
part cloud
part cloud
clear
clear
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:50
5:50
5:50
5:50
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
Temp °C
10
11
11
11
12
12
13
12
11
12
11
11
13
14
13
13
14
11
12
13
11
4
5
4
7
8
10
11
9
9
9
7
9
8
8
10
10
10
8
8
9
9
Swell 1
Height (m)
Direction
Period (s)
1.3
WNW
12
0.5
SSW
14
1.3
WNW
11
0.8
SSW
21
0.8
SSW
20
1.7
WNW
10
1.8
NW
10
1.6
NW
10
1.8
NW
9
1
SSW
16
1
SSW
16
1
SSW
16
0.9
SSW
16
0.9
SSW
15
0.7
SW
14
1
W
10
1.3
SSW
19
1.1
WNW
11
1.4
SSW
18
1.4
SSW
18
1.4
SSW
17
Energy kJ
466
107
400
511
500
599
600
517
528
559
539
525
382
348
211
184
1135
314
1159
1159
1107
Swell 2
Height (m)
Direction
Period (s)
0.5
SSW
14
0.2
SSW
24
0.4
SSW
22
0.3
SSW
13
0.4
SW
16
0.8
SSW
20
1.3
NNW
10
1
NNW
9
1.1
SSW
17
0.8
WNW
9
0.1
SW
22
0.2
SSW
22
0.6
WNW
12
0.8
WNW
11
0.7
SSW
18
0.9
SSW
18
0.5
WNW
12
1
SSW
19
1.3
WNW
11
1.2
WNW
11
1.2
WNW
11
Energy kJ
104
54
185
32
66
485
305
147
742
96
18
45
109
167
276
520
83
750
401
319
313
Swell 3
Height (m)
Direction
Period (s)
0.2
SSW
19
0.2
SSW
19
0.4
SSW
13
0.3
SSW
13
0.5
SSW
16
1
SSW
18
1
SSW
18
0.5
NNW
8
0.1
S
12
0.1
S
15
0.2
S
14
0.5
SSW
19
0.6
SSW
19
0.5
SSW
21
0.8
SSW
15
0.1
S
12
0.8
SSW
16
0.1
S
13
0.1
S
11
0.1
S
11
Energy kJ
37
34
69
32
153
623
659
38
3
4
16
214
251
256
272
3
318
3
2
3
Wind waves
Height (m)
Direction
Period (s)
2.1
NW
8
3
NW
8
2.5
NW
8
3
NW
10
3
NW
9
2.1
NW
9
1.8
NW
8
1.5
NW
7
1.7
NW
7
2.1
NW
7
1.4
NW
6
1.3
NW
6
2.4
NW
7
2.1
NW
7
2.5
NW
7
1.9
NW
7
1.3
NW
6
1.3
NW
6
0.6
NW
5
Energy kJ
567
1303
908
1449
1718
703
375
206
255
382
129
107
516
472
635
331
132
100
14
Nearest Offshore or Glassy
Rating
(10 max)
2
2
4
4
3
4
3
3
4
2
1
3
2
2
3
3
2
4
2
3
4
Distance (km)
183
303
59
129
304
0
111
82
0
277
277
0
202
277
0
202
304
59
277
170
0
Best forecast wave conditions in Mendocino County
Rating
(10 max)
4
4
4
3
3
4
4
Best forecast wave conditions in United States
Rating
(10 max)
2
2
4
4
4
4
4
3
4
4
3
4
3
3
3
4
2
4
2
3
4
Header Global
Rating
(10 max)
7
7
6
5
5
4
5
5
6
4
4
5
5
5
4
5
8
5
5
7
9
  • 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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