The Patch surfForecast / CAL – Marin County / USA

information circle48hr Weather and Surf, issued 10 pm Monday 18 May 2026 PDT
Forecast update in hr  min  s Forecast update imminent
The Patch surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's The Patch sea temperature is
11.9° C
(Which is normal for this time of year)

How big are the waves at The Patch today?

The current surf forecast for The Patch at 4AM is: 1.7m 10s primary swell from a West-northwest direction and 0.7m 16s secondary swell from a West direction (forecast issued at 10:00pm May 18). The wind direction is predicted to be cross-offshore and the swell rating is 3.

Time (PDT) & DateWave HeightWave Period
Morning (19 May)5ft (1.5m)10s
Afternoon (19 May)4.5ft (1.4m)10s
Evening (19 May)3.5ft (1.0m)14s

Table - waves today at The Patch. (Swell directed towards the surf break)


Updates in  hr  min  s Forecast update imminent

Short Range Forecast

Mostly dry. Warm (max 22°C on Tue afternoon, min 10°C on Wed night). Wind will be generally light.

Mon
18
Tuesday
19
Wednesday
20
Thursday
21
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)
2
2
3
3
3
3
3
2
2
3
2
3
3
2
2
3
3
3
2
3
2
2
1
1
Swell
Height Map
Height MapHeight Map
Height MapHeight MapHeight Map
Height MapHeight MapHeight Map
Height MapHeight MapHeight Map
Wave
Height (m)
Direction
Period (s)
1.9
WNW
10
2
WNW
10
1.8
WNW
10
1.7
WNW
10
1.6
WNW
10
1.4
WNW
10
1.4
WNW
10
1.4
WNW
10
1
W
14
1
W
13
1.1
W
13
1.6
WNW
10
1.6
WNW
10
1.4
WNW
10
1.3
WNW
10
1.3
WNW
10
1.3
WNW
10
1.6
WNW
10
1.8
WNW
10
1.8
WNW
11
1.6
WNW
11
1.5
WNW
11
1.4
WNW
11
1.4
WNW
11
Wave Graph
Metric surfscale
Energy kJ
669
717
578
563
443
370
394
402
372
345
414
443
443
370
325
290
319
434
603
745
586
521
444
444
Wind (km/h)
20
NW
15
NW
10
NW
10
NW
0
NNE
0
NNW
15
W
20
WNW
20
NW
10
WNW
10
WSW
5
SSW
5
SSW
10
S
10
SW
10
WNW
15
WNW
10
WNW
5
W
5
SSW
5
S
10
SSW
10
WSW
10
WSW
cross-off
cross-off
cross-off
cross-off
glassy
glassy
cross-off
cross-off
cross-off
cross-off
cross
glassy
glassy
on
cross-on
cross-off
cross-off
cross-off
cross
glassy
on
on
cross-on
cross-on
High Tide
1:02AM1.41m
3:38PM1.00m
1:55AM1.34m
4:36PM1.01m
2:54AM1.24m
Low Tide
7:42PM0.52m
8:52AM-0.35m
8:42PM0.54m
9:47AM-0.29m
9:52PM0.55m
10:45AM-0.21m
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
part cloud
cloud
clear
clear
clear
clear
clear
part cloud
clear
part cloud
part cloud
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:56
5:56
5:56
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
8:15
8:16
8:17
8:17
Temp °C
16
15
15
15
16
20
22
19
13
12
11
11
11
15
16
15
12
11
11
10
12
16
16
16
11
11
12
12
14
18
18
14
9
9
9
10
10
13
14
13
10
9
10
9
11
14
14
14
Swell 1
Height (m)
Direction
Period (s)
0.3
W
18
0.5
W
16
1.8
WNW
10
1.7
WNW
10
1.6
WNW
10
1.4
WNW
10
1.4
WNW
10
0.9
W
14
1
W
14
1.3
WNW
9
1.4
WNW
9
1.6
WNW
10
1.6
WNW
10
1.4
WNW
10
1.3
WNW
10
1.3
WNW
10
1.3
WNW
10
1.6
WNW
10
1.8
WNW
10
1.8
WNW
11
1.6
WNW
11
1.5
WNW
11
1.4
WNW
11
1.4
WNW
11
Energy kJ
55
135
578
563
443
370
394
329
372
255
326
443
443
370
325
290
319
434
603
745
586
521
444
444
Swell 2
Height (m)
Direction
Period (s)
0.3
SW
17
0.3
SW
17
0.6
W
16
0.7
W
16
0.8
W
15
0.9
W
15
0.9
W
14
0.3
SW
16
0.3
SW
16
1
W
13
1.1
W
13
0.9
W
13
0.9
W
13
0.9
W
13
0.9
WNW
12
1
W
12
0.9
WNW
12
1
W
12
0.8
WNW
12
0.4
SW
19
0.6
SW
19
0.5
SW
19
0.4
SW
19
0.4
SW
15
Energy kJ
45
46
186
248
291
343
333
42
42
345
414
268
268
263
220
274
224
270
186
133
236
184
133
84
Swell 3
Height (m)
Direction
Period (s)
0.2
SSW
12
0.2
SSW
16
0.3
SW
17
0.3
SSW
15
0.3
SSW
15
0.3
SSW
15
0.3
SW
16
0.2
SSW
15
0.3
SSW
15
0.3
SW
16
0.3
SSW
14
0.3
SW
21
0.4
SW
21
0.4
SW
21
0.3
SW
16
0.4
SW
16
0.4
SW
16
0.4
SW
15
0.3
SW
15
0.3
SW
15
0.3
SSW
13
0.3
SSW
13
0.4
SW
15
0.3
SSW
13
Energy kJ
15
25
44
45
43
43
40
21
42
42
40
72
162
162
40
64
85
82
35
36
34
34
82
31
Wind waves
Height (m)
Direction
Period (s)
1.9
WNW
10
2
WNW
10
1.4
WNW
10
1.3
WNW
10
Energy kJ
669
717
402
290
Nearest Offshore or Glassy
Rating
(10 max)
2
3
3
3
3
3
3
2
4
2
2
3
3
2
2
2
2
3
2
3
2
2
4
4
Distance (km)
83
21
0
0
0
0
0
120
54
0
22
0
0
22
22
0
0
0
22
0
22
22
263
203
Best forecast wave conditions in Marin County
Rating
(10 max)
3
4
3
3
3
3
3
2
4
4
2
2
3
3
4
2
4
2
2
Best forecast wave conditions in United States
Rating
(10 max)
4
4
4
4
4
4
4
4
4
4
4
4
4
4
2
4
4
4
3
4
4
3
4
4
Header Global
Rating
(10 max)
4
4
4
4
4
4
4
5
5
5
4
4
4
5
5
5
4
5
4
4
4
5
4
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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