Cape Mendocino Surf Break

Lat Long: 40.42° N 124.40° W

Cape Mendocino Surf Forecast and Surf Report

Issued: 4 am 09 Aug 2026 (local time)

Forecast update in  hr  min

Today's Cape Mendocino sea temperature is
11.6° C
2.7° 

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


Cape Mendocino surf forecast from 9 Aug 2026:

  • Best quality surf: Friday 14 Aug, 11PM (local time) - 4.5ft (1.4m), 8s period, NW swell with cross-offshore winds.
  • Most powerful swell: Sunday 16 Aug, 5AM (local time) - 4ft (1.2m), 16s period, SSW swell with 724 kJ wave energy.
  • Next surfable swell (1★+): Thursday 13 Aug, 11PM (local time) - 2.5ft (0.7m), 16s period with SW swell.

Best Forecast Surf Conditions for Cape Mendocino this week:

The surf forecast for Cape Mendocino over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Thursday (Aug 13) at 11PM. The primary swell is predicted to be 0.7m and 16s period. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Cape Mendocino in the next 16 days are 1.2m 16s and forecast to arrive on Sunday (Aug 16) at 5AM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 3.0m 9s period and expected on Monday (Aug 10) at 2AM.

Wave TypeTime (PDT) & Date Wave Height & Period
Next good surf (1 star+)11PM (Thu 13th Aug)2.5ft (0.7m) 16s
Best Surf11PM (Fri 14th Aug)4.5ft (1.4m) 8s
Most Powerful 5AM (Sun 16th Aug)4ft (1.2m) 16s

Table - best surf conditions forecast for Cape Mendocino over the next 16 days.


The Lowdown

Alright folks, Rusty here. Let’s get into it for the Cape Mendocino stretch. We’ve got a pretty quiet run ahead, so don’t get your hopes up for anything firing just yet.

First off, the water is sitting at 53°F, which is a solid 5°F colder than usual for this time of year. That’s a noticeable chill, so you’ll want the thickest wetsuit you’ve got – it’s much colder than normal out there.

The first few days are a write-off. Sunday the 9th through to Thursday the 13th are all “poor surf conditions” with messy cross-shore winds and lumpy, choppy sea. The swell is tiny, around 1ft to 2ft, and the wind is howling from the NNW at 18 mph. Don’t even bother.

We start to see a shift on Friday the 14th. The morning session at Cape Mendocino looks alright – glassy conditions with a light SW wind, and a clean 2ft SSW groundswell. The energy is moderate (277), and the period is a solid 15 seconds, so there’s some shape there. It’s not big, but it’s clean. That’s your first real window.

Then things get a bit interesting. Saturday the 15th brings a bit more size, but the wind is cross-on, so it’s messy. However, Sunday the 16th afternoon has a standout moment: glassy conditions, a 3ft SSW swell with a 16-second period, and the combined energy is strong at 651. That’s the best on offer in the whole forecast – clean, punchy, and with that long-period groundswell for shape. It’s a small window, but it’s the one.

After that, we have a few more marginal days. Monday the 17th is cross-shore and lumpy. Tuesday the 18th afternoon goes glassy again with a 3ft SSW swell – another clean session, but smaller. Then Wednesday the 19th and Thursday the 20th are back to poor conditions. The second week dries up fast, with mostly small, cross-shore junk.

Friday the 21st through to Sunday the 23rd are all poor or marginal, with tiny 1ft to 2ft swells and cross-shore winds. The highlight in the second week is Monday the 24th morning – glassy, 2ft SW swell with a 18-second period. It’s small, but it’ll be clean. That’s the only other real option.

So, the best two windows: Sunday the 16th afternoon is your standout – glassy, solid 3ft, long-period groundswell. And for a quieter, cleaner session, Friday the 14th morning or Monday the 24th morning are your best bets. Don’t expect much else. The stretch from the 9th to the 13th is a total dead zone, and the second week is mostly a dud.

Rusty out.

Short Range Forecast

Mostly dry. Very mild (max 17°C on Mon afternoon, min 12°C on Sun night). Mainly fresh winds.

Days 4-6 Weather Summary

Mostly dry. Very mild (max 17°C on Wed afternoon, min 12°C on Fri night). Winds decreasing (fresh winds from the N on Wed morning, calm by Fri morning).

Sunday
9
Monday
10
Tuesday
11
Wednesday
12
Thursday
13
Friday
14
Saturday
15
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
0
0
0
0
0
0
0
0
0
1
2
2
3
2
2
3
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.7
SSW
16
0.6
SSW
16
0.6
SSW
15
0.6
SSW
14
0.6
SSW
14
0.4
SW
20
0.4
SW
19
0.4
SW
18
0.6
SSW
18
0.6
SSW
18
0.5
SW
17
0.6
SSW
16
0.6
SW
16
0.6
SW
16
0.7
SW
16
0.6
SSW
15
1.6
NW
8
0.7
SSW
18
1
SSW
17
1
SSW
16
1.1
SSW
16
Wave Graph
Metric surfscale
Energy kJ
263
196
167
165
163
134
95
115
209
207
137
173
206
201
245
150
291
280
576
505
627
Wind (km/h)
30
NNW
30
N
30
N
30
NNW
25
N
25
N
30
NNW
25
N
30
N
35
N
30
N
30
N
15
NNW
20
NNW
10
N
5
SW
10
NW
15
NNE
10
WSW
10
NW
5
NNE
Wind State
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross-on
cross
cross
glassy
cross-on
cross-off
cross-on
cross-on
glassy
High Tide
10:27AM1.35m
8:39PM2.04m
11:10AM1.45m
9:39PM2.09m
11:49AM1.53m
10:34PM2.09m
12:26PM1.60m
11:26PM2.05m
1:02PM1.66m
00:17AM1.94m
1:36PM1.71m
1:08AM1.78m
2:09PM1.74m
2:00AM1.60m
Low Tide
2:55PM0.97m
4:20AM-0.29m
3:57PM0.89m
5:08AM-0.34m
4:52PM0.79m
5:51AM-0.32m
5:45PM0.68m
6:32AM-0.24m
6:36PM0.58m
7:11AM-0.11m
7:28PM0.49m
7:49AM0.06m
8:19PM0.43m
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
cloud
clear
part cloud
part cloud
clear
cloud
part cloud
part cloud
part cloud
part cloud
part cloud
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:22
6:22
6:24
6:24
6:26
6:26
6:28
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
8:22
8:22
8:20
8:19
8:17
8:15
8:15
 mm
Temp °C
16
16
14
16
17
15
16
17
15
16
17
15
15
15
14
15
15
14
15
15
13
Feels °C
12
11
10
11
12
11
11
12
11
10
12
11
13
13
11
15
15
12
14
14
13
  • Map Icons:
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  • 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 Cape Mendocino Surf forecast

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

Cape Mendocino is 47 km (29 miles) from Eureka. If you plan a vacation in Humboldt County, look for hotels and other accommodation in Eureka. Eureka has rooms for a wide range of budgets as well as car hire and transport links.

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