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Surf Forecasts:

Big River surfForecast / CAL – Mendocino County / USA

information circle12 Day Weather and Surf, issued 3 pm Tuesday 17 Feb 2026 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
13.0° C
 (Which is 1.4°C warmer than normal for this time of year)

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 Wednesday (Feb 18) at 4AM. The primary swell is predicted to be 4.5m and 13s period with a secondary swell of 0.2m and 13s. 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 4.5m 13s and forecast to arrive on Tuesday (Feb 17) at 10PM. Winds are predicted to be cross-shore at the time the swell arrives.

Wave TypeTime (PST) & Date Wave Height & Period
Next good surf (1 star+) 4AM (Wed 18th Feb)15ft (4.5m) 13s
Best Surf 4AM (Wed 18th Feb)15ft (4.5m) 13s
Most Powerful10PM (Tue 17th Feb)15ft (4.5m) 13s

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

Updates in  hr  min  s Forecast update imminent 
12 DaysHourly
Print Table

Short Range Forecast Heavy rain (total 21mm), heaviest during Wed night. Mild temperatures (max 9°C on Wed morning, min 2°C on Thu night). Winds increasing (calm on Wed afternoon, strong winds from the NNW by Thu afternoon).

Days 3-6 Weather Summary Heavy rain (total 59mm), heaviest during Sun morning. Very mild (max 14°C on Sun afternoon, min 5°C on Fri night). Winds increasing (light winds from the S on Fri afternoon, near gales from the SE by Sat night).

Tue
17
Wednesday
18
Thursday
19
Friday
20
Saturday
21
Sunday
22
Monday
23
PMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAM
Rating
(10 max)
0
4
3
3
3
3
2
5
3
1
1
0
0
0
0
0
0
1
1
4
3
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
3.5
W
4.5
WNW
4.5
WNW
4
WNW
3
WNW
3
NW
4
NW
3.5
NW
2.2
NW
1.2
NW
1.1
WNW
1.6
SSE
2.1
SSE
4.5
S
3.5
S
4
SSW
3.5
SW
3
WSW
3
WSW
2
WSW
1.4
WSW
Period(s) (?)12131313121111111010967101110101010109
Wave
Graph
(?)Metric surfscale
Energy kJ (?)40026627644054362280205839982723967281201148395390627782659222318021779772333
Wind
(km/h)
30
WNW
25
NNW
30
NW
15
NW
15
ESE
20
N
45
NNW
10
NNE
10
E
10
S
20
ESE
30
ESE
35
SE
45
SE
40
SSE
40
SSE
35
S
20
SSW
20
SW
10
E
10
ESE
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
on		cross-
off		cross-
off		crosscross-
off		cross-
off		cross-
off		cross-
off		cross-
off		cross-
on		cross-
off		cross-
off		crosscrosscross-
on		cross-
on		cross-
on		cross-
on		oncross-
off		cross-
off
High Tide
/ height (m)
11:50PM
1.54
11:13AM
1.76
12:17AM
1.63
11:59AM
1.66
12:45AM
1.70
12:49PM
1.51
1:16AM
1.77
1:48PM
1.34
1:52AM
1.81
3:00PM
1.18
2:35AM
1.83
4:33PM
1.07
3:28AM
1.83
Low Tide
/ height (m)
5:15PM
-0.11
5:14AM
0.55
5:45PM
-0.04
5:59AM
0.44
6:15PM
0.09
6:49AM
0.33
6:46PM
0.25
7:43AM
0.24
7:19PM
0.42
8:44AM
0.16
7:55PM
0.60
9:55AM
0.09
8:40PM
0.77
11:13AM
0.02
Tue
17
Wednesday
18
Thursday
19
Friday
20
Saturday
21
Sunday
22
Monday
23
Sunrise--7:03--7:01--7:00--6:58--6:58--6:56--6:54
Sunset5:53--5:54--5:55--5:57--5:58--5:59--6:00--
rain showers
rain showers
rain showers
cloud
mod rain
rain showers
clear
part cloud
cloud
cloud
part cloud
cloud
part cloud
mod rain
heavy rain
light rain
rain showers
rain showers
rain showers
clear
clear
Rain (mm)
571-71-------83641012--
Temp. °C7899688799612111213141412121113
Feels °C (?)-11342-2-2165043266688910
  • 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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The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Big River surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.

View detailed surf forecast for Big River at:
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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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