Cape Mendocino surfForecast / CAL – Humboldt / USA

information circle48hr Weather and Surf, issued 10 pm Sunday 17 May 2026 PDT
Forecast update in hr  min  s Forecast update imminent
Cape Mendocino surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Cape Mendocino sea temperature is
9.6° C
(Which is 2.4°C colder than average for this time of year)

How big are the waves at Cape Mendocino today?

The current surf forecast for Cape Mendocino at 5AM is: 2.2m 9s primary swell from a Northwest direction and 0.4m 13s secondary swell from a South-southwest direction (forecast issued at 10:00pm May 17). An open ocean swell of 1.4m 8s is not directed at the surf break. The wind direction is predicted to be cross-offshore.

Time (PDT) & DateWave HeightWave Period
Morning (18 May)2.5ft (0.8m)11s
Afternoon (18 May)2.5ft (0.7m)17s
Evening (18 May)3.5ft (1.1m)16s

Table - waves today at Cape Mendocino. (Swell directed towards the surf break)


Updates in  hr  min  s Forecast update imminent

Short Range Forecast

Mostly dry. Very mild (max 14°C on Tue afternoon, min 9°C on Sun night). Mainly fresh winds.

Sun
17
Monday
18
Tuesday
19
Wednesday
20
8 PM
11 PM
2 AM
5 AM
8 AM
11 AM
2 PM
5 PM
8 PM
11 PM
2 AM
5 AM
8 AM
11 AM
2 PM
5 PM
8 PM
11 PM
2 AM
5 AM
8 AM
11 AM
2 PM
5 PM
Rating
(10 max)
0
0
0
2
0
0
0
0
0
2
1
1
1
1
1
1
0
1
1
1
0
0
0
0
Swell
Height Map
Height MapHeight Map
Height MapHeight MapHeight Map
Height MapHeight MapHeight Map
Height MapHeight MapHeight Map
Wave
Height (m)
Direction
Period (s)
1.4
WNW
11
1.7
WNW
11
1.5
WNW
11
2.2
NW
9
0.9
WNW
11
2.2
NW
8
2.2
NW
8
0.8
WNW
16
1
WNW
16
1.3
WNW
16
1.6
WNW
15
1.5
WNW
15
1.6
WNW
14
1.7
WNW
14
1.6
WNW
14
1.7
WNW
13
1.6
WNW
13
1.6
WNW
13
1.8
WNW
13
1.9
WNW
13
1.7
WNW
12
1.2
WNW
12
1.1
WNW
12
1.3
WNW
12
Wave Graph
Metric surfscale
Energy kJ
458
661
499
798
170
682
666
343
532
778
1162
911
996
1143
957
987
862
812
1060
1207
871
384
347
429
Wind (km/h)
30
N
25
N
25
N
25
N
20
N
30
NNW
30
N
35
N
30
N
25
N
30
N
30
N
30
N
30
N
30
N
30
N
25
N
25
N
30
N
35
N
35
N
35
N
35
N
35
N
cross
cross
cross
cross-off
cross
cross
cross
cross
cross
cross-off
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
High Tide
11:54PM2.02m
2:23PM1.39m
00:44AM1.98m
3:20PM1.39m
1:37AM1.89m
4:18PM1.41m
Low Tide
6:12PM0.79m
7:23AM-0.61m
7:05PM0.85m
8:16AM-0.57m
8:05PM0.89m
9:11AM-0.47m
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
part cloud
cloud
clear
clear
clear
clear
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:58
5:58
5:56
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
8:28
8:29
8:30
8:30
Temp °C
11
10
9
9
11
13
13
13
12
10
10
9
11
13
14
14
12
11
11
10
11
13
13
12
4
5
3
4
6
7
7
7
6
5
4
2
5
7
8
9
7
6
5
3
4
6
6
5
Swell 1
Height (m)
Direction
Period (s)
1.4
WNW
11
1.7
WNW
11
1.5
WNW
11
2.2
NW
9
0.9
WNW
11
0.7
WNW
11
0.5
WNW
18
0.8
WNW
16
1
WNW
16
1.3
WNW
16
1.6
WNW
15
1.5
WNW
15
1.6
NW
10
1.7
WNW
14
1.6
WNW
14
1.7
WNW
13
1.6
WNW
13
1.6
WNW
13
1.8
WNW
13
1.9
WNW
13
1.7
WNW
12
1.2
WNW
12
1.1
WNW
12
1.3
WNW
12
Energy kJ
458
661
499
798
170
107
178
343
532
778
1162
911
480
1143
957
987
862
812
1060
1207
871
384
347
429
Swell 2
Height (m)
Direction
Period (s)
0.4
SSW
14
0.4
SSW
13
0.4
SSW
13
0.4
SSW
13
0.4
SSW
13
0.4
NW
18
0.3
SSW
13
0.3
S
16
0.3
S
16
0.6
WNW
12
0.4
SW
17
1.3
WNW
10
1.6
WNW
14
0.4
SW
16
0.4
S
15
1.2
NW
8
0.4
SW
16
0.4
SW
16
0.4
SW
16
0.4
SW
16
0.4
SW
21
0.5
SW
21
0.4
SW
16
0.4
SW
16
Energy kJ
62
60
60
59
59
82
34
46
46
90
76
327
996
69
71
196
96
96
95
68
162
224
90
89
Swell 3
Height (m)
Direction
Period (s)
0.1
SW
18
0.2
SSW
18
0.1
SW
18
0.2
SSW
18
0.2
WNW
19
0.4
SSW
13
0.4
NW
14
0.3
SSW
13
0.3
WNW
13
0.4
SW
17
0.3
S
16
0.4
SW
17
0.4
SW
16
0.3
S
16
0.4
SW
16
0.4
SW
16
0.3
S
15
0.3
S
15
0.3
S
15
0.3
S
15
0.4
SW
16
0.4
SW
16
0.4
S
14
0.4
S
14
Energy kJ
12
31
13
32
37
58
52
34
35
74
46
70
69
42
69
69
39
39
38
38
66
65
61
60
Wind waves
Height (m)
Direction
Period (s)
3
NNW
9
3
NNW
9
2.5
NNW
9
1.4
N
8
2.2
NNW
9
2.2
NW
8
2.2
NW
8
2.4
NNW
8
2.5
NW
8
2.5
NNW
9
2.5
NNW
9
2.4
NNW
8
2.1
NNW
8
2.4
NNW
8
2.2
NNW
8
1.5
N
7
1.9
NNW
8
2
NNW
8
2
NNW
8
2.2
NNW
8
2.2
NNW
8
2.5
NNW
8
2.5
NNW
8
2.5
NNW
8
Energy kJ
1482
1205
998
252
732
682
666
750
860
1106
1133
782
575
790
590
251
419
471
489
599
618
1006
1031
1020
Nearest Offshore or Glassy
Rating
(10 max)
1
4
3
4
3
2
2
2
2
4
4
4
4
4
3
2
4
4
4
5
4
4
1
4
Distance (km)
438
59
54
40
40
234
436
437
234
59
59
59
54
262
316
436
109
59
52
51
54
289
294
262
Best forecast wave conditions in Humboldt County
Rating
(10 max)
4
3
4
3
4
4
4
4
4
4
5
4
Best forecast wave conditions in United States
Rating
(10 max)
4
6
5
4
4
3
4
4
4
4
4
4
4
4
4
3
4
4
4
5
4
4
3
4
Header Global
Rating
(10 max)
4
6
5
4
4
5
5
4
4
4
4
4
4
4
4
4
5
5
4
5
5
5
5
5
  • 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

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