Big River surfForecast / CAL – Mendocino County / USA

information circle16 Day Weather and Surf, issued 4 am Friday 29 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
11.0° C
(Which is 1.4°C colder than average for this time of year)

Big River surf forecast from 29 May 2026:

  • Best quality surf: Sunday 31 May, 5AM (local time) - 6ft (1.9m), 10s period, NW swell with cross-offshore winds.
  • Most powerful swell: Friday 29 May, 2PM (local time) - 8ft (2.4m), 14s period, NW swell with 2,423 kJ wave energy.
  • Next surfable swell (1★+): Sunday 31 May, 5AM (local time) - 6ft (1.9m), 10s 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 1.9m and 10s period with a secondary swell of 0.5m and 22s. Another secondary swell of 2.0m and 8s 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 2.4m 14s and forecast to arrive on Friday (May 29) at 2PM. Winds are predicted to be cross-shore at the time the swell arrives.

Wave TypeTime (PDT) & Date Wave Height & Period
Next good surf (1 star+) 5AM (Sun 31st May)6ft (1.9m) 10s
Best Surf 5AM (Sun 31st May)6ft (1.9m) 10s
Most Powerful 2PM (Fri 29th May)8ft (2.4m) 14s

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 12°C on Fri morning, min 8°C on Sat night). Winds decreasing (fresh winds from the NNW on Sat afternoon, light winds from the NNW by Sun night).

Days 4-6 Weather Summary

Mostly dry. Very mild (max 13°C on Wed morning, min 9°C on Mon night). Winds increasing (calm on Mon night, fresh winds from the NW by Wed afternoon).

Friday
29
Saturday
30
Sunday
31
Monday
1
Tuesday
2
Wednesday
3
Thursday
4
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
3
1
2
3
2
2
4
3
2
3
1
1
3
1
0
3
1
2
4
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
2.4
WNW
14
1.8
WNW
14
1.5
WNW
13
3
NW
9
3.5
NW
8
2.5
NW
8
3
NW
10
3
NW
9
3
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
0.8
SSW
15
2.5
NW
7
0.9
SSW
18
1.3
SSW
19
1
SSW
19
Wave Graph
Metric surfscale
Energy kJ
2346
1351
734
1160
1701
908
1672
1569
1360
623
659
742
559
539
525
382
283
681
520
1135
750
Wind (km/h)
15
NW
20
NW
15
NNW
25
NW
35
NNW
20
NNW
15
NW
20
NW
10
N
10
WNW
15
NW
10
N
15
NW
20
NW
15
NNW
20
NW
30
NW
20
NNW
20
NW
20
NW
10
NNW
cross
cross
cross-off
cross
cross-off
cross-off
cross
cross
cross-off
cross
cross
cross-off
cross
cross
cross-off
cross
cross
cross-off
cross
cross
cross-off
High Tide
11:51AM1.15m
10:22PM1.77m
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
Low Tide
4:09PM0.75m
5:39AM-0.23m
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
part cloud
part cloud
part cloud
clear
clear
clear
clear
clear
clear
clear
part cloud
part cloud
part cloud
part cloud
clear
clear
clear
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:52
5:50
5:50
5:50
5:50
5:48
5:48
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
8:32
8:34
8:34
8:35
8:36
8:37
8:37
Temp °C
12
12
11
10
11
11
12
12
11
12
12
11
11
12
10
13
13
12
12
13
11
9
9
8
4
5
4
8
8
8
9
9
9
8
8
7
8
7
7
8
9
7
Swell 1
Height (m)
Direction
Period (s)
2.4
WNW
14
1.8
WNW
14
1.5
WNW
13
0.5
SSW
14
0.5
SSW
14
1.3
WNW
11
3
NW
10
0.8
SSW
20
2.5
NW
9
1.7
NW
10
1.6
NW
10
1.1
SSW
17
1
SSW
16
1
SSW
16
1
SSW
16
0.9
SSW
16
0.8
SSW
15
0.7
SW
14
0.9
WNW
9
1.3
SSW
19
1
SSW
19
Energy kJ
2346
1351
734
104
107
386
1480
500
1162
546
480
742
559
539
525
382
283
211
144
1135
750
Swell 2
Height (m)
Direction
Period (s)
0.6
SSW
14
0.6
SSW
14
0.5
SSW
14
0.2
SSW
19
0.2
SSW
24
0.4
SSW
22
0.8
SSW
21
0.4
SW
16
0.8
SSW
20
1.3
NNW
10
1.2
NNW
9
0.9
WNW
9
0.7
WNW
9
0.1
SW
22
0.2
SSW
22
0.5
SSW
19
0.7
WNW
11
0.7
SSW
18
0.9
SSW
18
0.5
WNW
12
0.9
WNW
11
Energy kJ
145
156
110
37
54
185
511
66
485
305
222
145
73
18
45
214
130
276
520
82
206
Swell 3
Height (m)
Direction
Period (s)
0.1
S
21
0.1
S
26
0.2
SSW
24
0.2
SSW
19
0.4
SSW
13
0.3
SSW
13
0.3
SSW
13
0.5
SSW
16
1
SSW
18
1
SSW
18
0.1
S
14
0.1
S
15
0.1
S
15
0.2
S
14
0.5
W
12
0.6
SSW
19
0.5
SSW
21
0.8
SSW
15
0.1
S
12
0.8
SSW
16
Energy kJ
9
13
56
34
69
32
32
153
623
659
4
4
4
16
77
251
256
272
3
318
Wind waves
Height (m)
Direction
Period (s)
1.5
NW
8
1.9
NW
7
2.3
NW
8
3
NW
9
3.5
NW
8
2.5
NW
8
3
NW
10
3
NW
9
3
NW
9
1.7
NNW
9
1.8
NW
8
1.7
NW
7
2.1
NW
7
2.1
NW
7
1.1
NW
5
1.7
NW
6
2.5
NW
7
1.7
NW
7
2.1
NW
7
1.7
NW
7
Energy kJ
313
312
684
1160
1701
908
1672
1569
1360
459
354
301
445
408
74
183
681
271
415
248
Nearest Offshore or Glassy
Rating
(10 max)
2
1
3
2
2
4
4
4
4
3
4
3
2
2
3
2
2
3
4
2
4
Distance (km)
202
305
59
202
303
39
129
304
0
160
59
0
160
304
0
273
305
59
129
304
0
Best forecast wave conditions in Mendocino County
Rating
(10 max)
3
4
4
4
4
3
3
4
Best forecast wave conditions in United States
Rating
(10 max)
2
2
4
3
3
4
4
4
4
4
4
4
4
2
4
3
3
4
4
3
4
Header Global
Rating
(10 max)
5
5
5
7
7
6
5
5
4
4
5
8
4
6
5
5
5
5
5
7
6
  • 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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