Cape Mendocino surfForecast / CAL – Humboldt / USA

information circle48hr Weather and Surf, issued 10 am Monday 18 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 1PM is: 0.8m 10s primary swell from a West-northwest direction and 0.4m 18s secondary swell from a West-northwest direction (forecast issued at 10:00am May 18). An open ocean swell of 2.1m 8s is not directed at the surf break. The wind direction is predicted to be cross-shore.

Time (PDT) & DateWave HeightWave Period
Morning (18 May)7ft (2.1m)9s
Afternoon (18 May)2.5ft (0.7m)17s
Evening (18 May)4ft (1.2m)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 Mon night). Mainly fresh winds.

Monday
18
Tuesday
19
Wednesday
20
Thu
21
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
8 PM
11 PM
2 AM
5 AM
Rating
(10 max)
1
0
0
0
0
3
1
1
1
1
1
1
2
2
1
1
0
0
0
0
0
0
0
0
Swell
Height Map
Height MapHeight MapHeight Map
Height MapHeight MapHeight Map
Height MapHeight MapHeight Map
Height MapHeight MapHeight Map
Wave
Height (m)
Direction
Period (s)
2.1
NW
9
2.2
NW
8
0.9
WNW
10
0.8
WNW
16
1
WNW
16
1.6
WNW
16
1.8
WNW
15
2
WNW
15
2.1
WNW
14
1.7
WNW
14
1.6
WNW
14
1.7
WNW
13
1.7
WNW
13
2
WNW
13
1.8
WNW
13
1.8
WNW
13
1.5
WNW
12
1.2
WNW
12
1.2
WNW
12
1.3
WNW
12
1.4
WNW
12
1.5
WNW
11
1.4
WNW
11
1.3
WNW
11
Wave Graph
Metric surfscale
Energy kJ
711
682
178
343
539
1214
1507
1626
1724
1143
957
987
958
1289
1060
1100
702
384
371
429
518
563
441
396
Wind (km/h)
20
N
25
NNW
30
NNW
30
N
25
N
20
NNE
30
N
30
N
30
N
30
N
30
N
25
N
25
N
20
N
30
N
35
N
35
N
35
N
35
N
30
N
30
N
25
N
25
N
25
N
cross
cross
cross
cross
cross
cross-off
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
High Tide
2:23PM1.39m
00:44AM1.98m
3:20PM1.39m
1:37AM1.89m
4:18PM1.41m
2:36AM1.75m
Low Tide
7:23AM-0.61m
7:05PM0.85m
8:16AM-0.57m
8:05PM0.89m
9:11AM-0.47m
9:15PM0.90m
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
cloud
clear
part cloud
part cloud
cloud
part cloud
clear
clear
clear
clear
part cloud
part cloud
part cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:58
5:58
5:56
5:56
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
8:29
8:30
8:30
8:31
Temp °C
11
13
13
12
11
10
10
9
11
13
14
13
12
11
10
10
11
12
13
12
11
10
10
10
6
7
7
6
5
6
4
3
5
7
9
8
8
7
4
4
4
5
6
6
5
5
5
5
Swell 1
Height (m)
Direction
Period (s)
2.1
NW
9
0.7
WNW
11
0.9
WNW
10
0.9
WNW
10
1
WNW
16
1.6
WNW
16
1.8
WNW
15
2
WNW
15
2.1
WNW
14
1.7
WNW
14
1.6
WNW
14
1.7
WNW
13
1.7
WNW
13
2
WNW
13
1.8
WNW
13
1.8
WNW
13
1.5
WNW
12
1.2
WNW
12
1.2
WNW
12
1.3
WNW
12
1.4
WNW
12
1.5
WNW
11
1.4
WNW
11
1.3
WNW
11
Energy kJ
711
107
163
154
539
1214
1507
1626
1724
1143
957
987
958
1289
1060
1100
702
384
371
429
518
563
441
396
Swell 2
Height (m)
Direction
Period (s)
0.9
WNW
11
0.4
NW
18
0.5
WNW
18
0.8
WNW
16
0.6
WNW
13
0.4
SW
17
0.4
SW
17
0.4
SW
17
0.4
SW
16
0.4
SW
16
0.4
S
15
0.4
SW
16
1.3
NW
8
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
0.5
SW
16
0.5
SW
16
0.5
SW
15
0.4
SW
15
Energy kJ
186
82
178
343
114
74
76
70
69
69
71
69
211
96
95
68
162
224
90
89
122
118
112
79
Swell 3
Height (m)
Direction
Period (s)
0.4
SSW
13
0.4
SSW
13
0.3
SSW
13
0.3
S
16
0.3
S
16
0.3
S
16
0.3
S
16
0.3
S
16
0.3
S
16
0.3
S
16
0.4
SW
16
0.4
S
15
0.4
SW
16
0.3
S
15
0.3
S
15
0.4
S
15
0.4
SW
16
0.4
SW
16
0.4
S
14
0.4
S
14
0.4
S
14
0.4
S
14
0.4
S
14
0.4
S
14
Energy kJ
59
58
34
46
46
46
46
45
45
42
69
69
96
39
38
67
66
65
61
60
58
58
58
58
Wind waves
Height (m)
Direction
Period (s)
0.9
N
8
2.2
NW
8
2
NNW
8
2.1
NNW
8
2.3
NW
8
2.5
NNW
8
2.5
NNW
8
2.3
NNW
8
2.2
NNW
8
2.3
NNW
8
2.2
NNW
8
2.1
NNW
8
1.5
N
8
1.5
N
7
2
NNW
8
2.2
NNW
8
2.4
NNW
8
2.5
NNW
8
2.5
NNW
8
2.5
NNW
8
2.4
NNW
8
2.3
NNW
9
2.5
NNW
9
2.5
NNW
9
Energy kJ
105
682
541
532
699
837
913
705
597
735
605
506
253
246
474
629
751
973
931
817
827
813
977
1045
Nearest Offshore or Glassy
Rating
(10 max)
3
2
3
1
2
4
4
4
4
4
4
2
4
4
5
5
4
3
3
4
2
4
4
4
Distance (km)
40
246
436
438
234
41
59
59
40
262
294
436
134
59
54
51
54
244
289
262
334
41
40
40
Best forecast wave conditions in Humboldt County
Rating
(10 max)
3
4
4
4
4
4
5
5
4
4
4
4
Best forecast wave conditions in United States
Rating
(10 max)
4
4
4
4
4
4
4
4
4
4
4
3
4
4
5
5
4
4
3
4
3
4
4
4
Header Global
Rating
(10 max)
5
5
4
4
4
4
4
4
5
4
5
5
5
4
5
5
4
5
5
4
4
5
5
4
  • 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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