Big River surfForecast / CAL – Mendocino County / USA

information circle12 Day Weather and Surf, issued 3 am Thursday 27 Nov 2025 PST
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
13.2° C
(Which is slightly warmer than usual)


Best Forecast Surf Conditions for Big River this week:

The surf forecast for Big River over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Thursday (Nov 27) at 10AM. The primary swell is predicted to be 1.3m and 11s period with a secondary swell of 0.6m and 18s. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Big River in the next 12 days are 2.5m 17s and forecast to arrive on Tuesday (Dec 02) at 4AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.3m 6s period and expected on Sunday (Nov 30) at 4AM.

Wave TypeTime (PST) & Date Wave Height & Period
Next good surf (1 star+)10AM (Thu 27th Nov)4.5ft (1.3m) 11s
Best Surf 7PM (Thu 27th Nov)7ft (2.1m) 12s
Most Powerful 4AM (Tue 2nd Dec)8ft (2.5m) 17s

Table - best surf conditions forecast for Big River over the next 12 days.

Updates in  hr  min  s Forecast update imminent

Short Range Forecast Mostly dry. Very mild (max 13°C on Thu morning, min 8°C on Sat night). Wind will be generally light.

Days 3-6 Weather Summary Mostly dry. Very mild (max 14°C on Tue morning, min 10°C on Sun morning). Wind will be generally light.

Thursday
27
Friday
28
Saturday
29
Sunday
30
Monday
01
Tuesday
02
Wednesday
03
AMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNight
Rating
(10 max)
3
3
4
3
4
3
3
3
4
3
2
3
3
4
4
4
4
4
4
4
4
Swell
Height Map
Wave Height (m) & direction (?)
1.3
WNW
1.5
WNW
2.3
WNW
2.3
WNW
1.5
WNW
1.5
WNW
1.3
WNW
1.5
WNW
2
W
1.8
W
1.6
W
1.3
W
1.3
WNW
1.8
WNW
2.5
WNW
2.5
W
2.5
WNW
2.3
WNW
2
W
1.9
WNW
1.7
WNW
Period(s) (?)111111111414141514121211211918161615151413
Wave
Graph
(?)Metric surfscale
Energy kJ (?)43555013551267886930595898146298972241014962509360933042942221617391399989
Wind
(km/h)
5
N
15
N
10
NNW
15
NW
15
NNW
5
ENE
5
N
10
NW
10
N
5
N
15
NNW
5
NE
5
SE
0
W
10
E
5
NNE
10
NNW
5
NE
5
NNW
15
NNW
10
NE
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
off
cross-
off
cross-
off
crosscross-
off
cross-
off
cross-
off
cross-
off
cross-
off
cross-
off
cross-
off
offcrossglasscross-
off
glasscross-
off
offglasscross-
off
off
High Tide
/ height (m)
3:11PM
1.41
5:37AM
1.53
4:34PM
1.32
6:09AM
1.65
6:02PM
1.26
6:42AM
1.79
7:23PM
1.26
7:17AM
1.94
8:37PM
1.30
7:55AM
2.07
9:43PM
1.36
8:36AM
2.19
10:43PM
1.41
Low Tide
/ height (m)
10:04AM
1.01
10:19PM
0.17
11:22AM
0.84
11:05PM
0.27
12:28PM
0.61
11:52PM
0.39
1:24PM
0.34
12:39AM
0.52
2:15PM
0.06
1:27AM
0.64
3:04PM
-0.19
2:15AM
0.74
3:53PM
-0.39
3:05AM
0.83
Thursday
27
Friday
28
Saturday
29
Sunday
30
Monday
01
Tuesday
02
Wednesday
03
Sunrise7:11--7:11--7:13--7:13--7:15--7:16--7:16--
Sunset-4:52--4:52--4:52--4:52--4:52--4:52--4:52-
clear
part cloud
part cloud
part cloud
clear
clear
clear
clear
part cloud
clear
clear
clear
clear
clear
clear
part cloud
clear
clear
clear
clear
clear
Rain (mm)
---------------------
Temp. °C13131212111012119121210131212141211121210
Feels °C (?)91211989987898111091199997
  • 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 12 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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