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Big River surfForecast / CAL – Mendocino County / USA

information circle12 Day Weather and Surf, issued 4 am Thursday 14 Aug 2025 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
13.7° C
 (Which is slightly cooler than normal)

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 Friday (Aug 15) at 8AM. The primary swell is predicted to be 1.8m and 6s period with a secondary swell of 0.8m and 15s. Another secondary swell of 0.2m and 12s 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 12 days are 3.0m 8s and forecast to arrive on Thursday (Aug 14) 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 (Fri 15th Aug)2.5ft (0.8m) 15s
Best Surf 8AM (Sun 17th Aug)5.5ft (1.7m) 10s
Most Powerful 8PM (Thu 14th Aug)10ft (3.0m) 8s

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

Hourly12 Days
Mendocino County Surf
Print Surf Table
Updates in  hr  min  s Forecast update imminent 

Short Range Forecast Mostly dry. Very mild (max 17°C on Fri morning, min 13°C on Thu morning). Winds decreasing (fresh winds from the NW on Fri afternoon, light winds from the NW by Sat night).

Days 3-6 Weather Summary Mostly dry. Very mild (max 16°C on Sun afternoon, min 12°C on Sun night). Wind will be generally light.

Thursday
14
Friday
15
Saturday
16
Sunday
17
Monday
18
Tuesday
19
Wednesday
20
AMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNight
Rating
(10 max)
1
1
2
0
0
1
0
1
2
2
1
3
1
1
2
1
0
2
1
0
2
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
1
SSW
2.5
NW
2.2
NW
0.8
SSW
1.9
NW
0.8
SSW
0.7
SSW
1.6
NW
1.9
NW
1.7
NW
1.6
NW
1.6
NW
1.3
NW
0.7
SW
0.6
SW
0.7
SW
0.7
SW
0.7
SW
0.8
SSW
1.9
NW
2.3
NW
Period(s) (?)147714614148101010101017161616161678
Wave
Graph
(?)Metric surfscale
Energy (?)7561213883526558390330550884813762743562589379466512544547665861
Wind
(km/h)
20
NW
25
NNW
20
NNW
25
NW
30
NW
15
NNW
15
NW
15
NW
10
NW
10
WNW
15
NW
0
NW
10
WNW
15
NW
5
E
10
WNW
20
NW
5
N
15
NW
20
NW
15
NNW
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
crosscross-
off		cross-
off		crosscross-
off		cross-
off		crosscrosscrosscross-
on		crossglasscross-
on		crossglasscrosscrosscross-
off		crosscrosscross-
off
High Tide
/ height (m)
3:34PM
1.82
4:38AM
1.20
4:20PM
1.86
6:17AM
1.11
5:16PM
1.87
8:01AM
1.12
6:21PM
1.89
9:19AM
1.20
7:29PM
1.92
10:13AM
1.29
8:33PM
1.95
10:54AM
1.36
9:31PM
1.98
Low Tide
/ height (m)
8:56AM
0.42
10:25PM
0.24
9:37AM
0.62
11:41PM
0.14
10:29AM
0.79
12:57AM
0.04
11:38AM
0.91
2:07AM
-0.07
1:02PM
0.95
3:08AM
-0.16
2:19PM
0.92
3:59AM
-0.21
3:22PM
0.84
4:44AM
-0.22
Thursday
14
Friday
15
Saturday
16
Sunday
17
Monday
18
Tuesday
19
Wednesday
20
Sunrise6:26--6:26--6:28--6:28--6:30--6:31--6:31--
Sunset-8:12--8:10--8:08--8:07--8:06--8:05--8:04-
part cloudclearclearclearclearpart cloudpart cloudpart cloudpart cloudpart cloudclearclearclearclearclearclearclearclearclearclearclear
Rain (mm)
---------------------
Temp. °C151615171717171715151615151615141514151514
Feels °C (?)131211141314161615141414141314121212121112
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
Map placeholder

Eyeball surf reportRecent Eyeball Surf Reports for CAL - Mendocino County

  1. weather stationWind Update Continuing clean conditions at Big River (calm at Mendocino 3 km from Big River). 2.0m 7s swell from the NW with a 0.8m 14s groundswell from the SSW. 2 swells combining to make bigger set waves.

    1 hour 41 minutes ago Big River
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1 h 41 min ago

0 km/h
ENE
Clean
Please reload the page to see if there are any updates.

FREE! Surf-Forecast.com widget for your website

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:
surf-forecast.com

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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