Navarro Rivermouth Surf Break

Lat Long: 39.19° N 123.76° W

Navarro Rivermouth Surf Forecast and Surf Report

Issued: 4 am 31 Aug 2026 (local time)

Forecast update in  hr  min

Today's Navarro Rivermouth sea temperature is
12.2°C
2.6° 

Navarro Rivermouth surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


Navarro Rivermouth surf forecast from 31 Aug 2026:

  • Best quality surf: Wednesday 2 Sep, 5AM (local time) - 1.5ft (0.5m), 18s period, SW swell with cross-offshore winds.
  • Most powerful swell: Thursday 3 Sep, 11PM (local time) - 6ft (1.8m), 10s period, NW swell with 637 kJ wave energy.
  • Next surfable swell (1★+): Monday 31 Aug, 11PM (local time) - 3ft (0.9m), 7s period with NW swell.

Best Forecast Surf Conditions for Navarro Rivermouth this week:

The surf forecast for Navarro Rivermouth over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Monday (Aug 31) at 11PM. The primary swell is predicted to be 0.9m and 7s period. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Navarro Rivermouth in the next 16 days are 1.8m 10s and forecast to arrive on Thursday (Sep 03) at 11PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.2m 15s period and expected on Saturday (Sep 05) at 8PM.

Wave TypeTime (PDT) & Date Wave Height & Period
Next good surf (1 star+)11PM (Mon 31st Aug)3ft (0.9m) 7s
Best Surf 5AM (Wed 2nd Sep)1.5ft (0.5m) 18s
Most Powerful11PM (Thu 3rd Sep)6ft (1.8m) 10s

Table - best surf conditions forecast for Navarro Rivermouth over the next 16 days.


The Lowdown

Alright folks, Rusty here. Let’s have a look at what’s on offer at the Navarro Rivermouth over the next couple of weeks.

Right off the bat, we’ve got a long wait on our hands. The first few days are a total write-off – poor surf conditions with onshore or cross-onshore winds, short period swell, and generally messy. The combined wave energy is moderate at best early on, around 211 (moderate energy) on the Monday morning, but the quality is just not there.

The first real glimmer of hope doesn’t show up until Thursday the 3rd of September, early in the morning. That’s the first time we see clean surf, with light cross-offshore winds from the SSE and a 5ft swell from the WNW with a period of 9 seconds. The combined energy bumps up to 351 (moderate energy), and the water is sitting at 54° – that’s 5° colder than usual for this time of year, so expect a proper chill. The afternoon of that day is a bit more questionable with cross-onshore wind, but it’s the best bet for a paddle.

After that, it gets a bit frustrating. The wind swings around and turns everything choppy again from Friday the 4th through the weekend. The swell hangs around 4ft to 6ft but the wind is a mess. There’s a decent pulse of energy on the 7th of September, Monday afternoon – glassy conditions with a 7ft NW swell and 560 (moderate-to-strong energy) – but that’s a rare moment.

The standout window, and I mean the *real* standout, looks like Wednesday the 9th of September. That afternoon we’ve got a solid 12ft swell from the NW with a period of 9 seconds, and the combined energy is a massive 2426 (strong energy). But here’s the kicker – the forecast says it’s too big for this break. This is a rivermouth, and that kind of size will be a washing machine. Only for experts, and even then, you’d want to be real comfortable with a big, powerful, cross-onshore setup. The morning of the 9th is a bit smaller at 7ft, but still cross-onshore.

Thursday the 10th of September is more of the same – big, powerful, but again, the 12ft afternoon pulse is flagged as too big. Friday the 11th drops back a touch to 8ft, but the wind is still cross-onshore. For the second week, the pattern holds: consistent NW swell, but the wind is rarely your friend. The 13th of September (Sunday) sees a 7ft to 8ft swell with a long period of 11 to 12 seconds (1328 energy), which is groundswell – great for points and reefs, but at a rivermouth it might just close out. Light winds offer some hope, but it’s a gamble.

Honestly, if you’re looking to get wet, your best bet is Thursday the 3rd of September for a clean, manageable size. That’s the one day where everything lines up for a decent, crowd-free session at a spot that’s often a bit inconsistent. The rest of the window is either too windy, too big, or both.

Stay patient, and keep an eye on that wind shift.

Rusty.

Short Range Forecast

Some drizzle, heaviest during Wed night. Very mild (max 16°C on Tue afternoon, min 11°C on Mon morning). Wind will be generally light.

Days 4-6 Weather Summary

Light rain (total 2mm), mostly falling on Thu morning. Very mild (max 16°C on Thu morning, min 10°C on Fri night). Wind will be generally light.

Monday
31
Tuesday
1
Wednesday
2
Thursday
3
Friday
4
Saturday
5
Sunday
6
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
0
0
0
0
0
1
0
0
2
2
2
1
0
0
2
0
0
2
0
0
2
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.3
NW
7
1.1
NW
7
0.8
NW
7
0.6
NW
11
0.9
NW
10
0.8
NW
10
0.6
SW
18
1
WNW
9
1.4
W
8
1.5
WNW
9
1.7
WNW
10
1.7
WNW
10
1.7
NW
10
1.5
NW
10
1.3
NW
10
1.3
NW
9
1.3
NW
9
1.3
NW
9
0.8
NW
9
1.4
NW
8
1.6
NW
6
Wave Graph
Metric surfscale
Energy kJ
194
115
59
71
167
127
246
157
264
351
544
532
623
442
334
307
272
281
109
283
220
Wind (km/h)
10
WNW
10
NW
5
ENE
10
SSW
10
SSW
10
E
20
SSW
15
SSW
10
SE
5
SSE
5
SW
5
NW
20
NW
25
NNW
5
ENE
10
WNW
15
NW
10
NE
15
WNW
10
NW
0
SSE
Wind State
on
cross-on
glassy
cross-on
cross-on
off
cross
cross-on
cross-off
cross-off
cross-on
cross-on
cross-on
cross-on
cross-off
cross-on
cross-on
cross-off
cross-on
cross-on
glassy
High Tide
1:52PM1.76m
2:31AM1.40m
2:26PM1.80m
3:40AM1.27m
3:08PM1.82m
5:08AM1.18m
4:00PM1.83m
6:50AM1.19m
5:03PM1.83m
8:14AM1.27m
6:14PM1.84m
9:11AM1.37m
7:27PM1.87m
Low Tide
8:12PM0.27m
8:02AM0.55m
9:07PM0.20m
8:43AM0.72m
10:10PM0.14m
9:34AM0.88m
11:23PM0.09m
10:47AM1.00m
00:40AM0.02m
12:15PM1.04m
1:50AM-0.05m
1:36PM0.98m
2:50AM-0.12m
clear
part cloud
part cloud
cloud
part cloud
part cloud
part cloud
part cloud
light rain
light rain
part cloud
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:41
6:43
6:43
6:45
6:46
6:46
6:47
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:46
7:45
7:44
7:43
7:40
7:38
7:37
 mm
1
2
Temp °C
14
15
15
15
16
15
16
16
16
16
16
14
14
15
13
14
14
13
15
16
14
Feels °C
12
13
14
14
14
14
13
13
15
16
16
14
10
11
10
11
11
12
12
13
14
  • 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 Navarro Rivermouth Surf forecast

The above surf forecast table for Navarro Rivermouth provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Navarro Rivermouth can be found by selecting the local surf guide option on the grey menu. Our Navarro Rivermouth 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 (Navarro Rivermouth) 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 Navarro Rivermouth 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.

Navarro Rivermouth is 48 km (30 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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