4 Mile Surf Break

Lat Long: 36.99° N 122.16° W

4 Mile 48 hour detailed Surf Forecast

Issued: 4 am 20 Aug 2026 (local time)

Forecast update in  hr  min

Today's 4 Mile sea temperature is
15.9° C
1.2° 

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


How big are the waves at 4 Mile today (20 Aug):

  • Morning surf: Morning surf (20 Aug, local time) - 2.5ft (0.8m), 14s period with SSW swell.
  • Afternoon surf: Afternoon surf (20 Aug, local time) - 2.5ft (0.7m), 14s period with SSW swell.
  • Evening surf: Evening surf (20 Aug, local time) - 2.5ft (0.8m), 14s period with SSW swell.

The current surf forecast for 4 Mile at 9AM is: 0.8m 14s primary swell from a South-southwest direction and 0.7m 7s secondary swell from a West-northwest direction (forecast issued at 04:00am August 20). The wind direction is predicted to be cross-shore.

Time (PDT) & DateWave HeightWave Period
Morning (20 Aug)2.5ft (0.8m)14s
Afternoon (20 Aug)2.5ft (0.7m)14s
Evening (20 Aug)2.5ft (0.8m)14s

Table - waves today at 4 Mile. (Swell directed towards the surf break)


Short Range Forecast

Mostly dry. Warm (max 21°C on Sat afternoon, min 14°C on Thu morning). Wind will be generally light.

Thursday
20
Friday
21
Saturday
22
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
8 PM
11 PM
Rating
(10 max)
2
2
2
1
0
0
1
2
2
2
2
0
0
0
0
2
1
2
2
0
0
0
1
2
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.8
SSW
15
0.8
SSW
14
0.8
SSW
14
0.7
SSW
14
0.7
SSW
14
0.8
SSW
14
0.8
SSW
14
0.8
SSW
14
0.7
SSW
14
0.7
SSW
14
0.6
SSW
14
0.4
SW
18
0.4
SW
18
0.4
SW
18
0.4
SW
18
0.5
SSW
13
0.5
SSW
13
0.5
SSW
13
0.5
SSW
13
0.5
SSW
13
0.4
SW
17
0.4
SSW
17
0.6
SSW
16
1.3
NW
6
Wave Graph
Metric surfscale
Energy kJ
252
220
217
173
178
236
236
236
183
180
156
105
101
99
99
99
99
99
98
99
75
111
175
114
Wind (km/h)
5
NNW
10
NNW
10
NNW
15
WNW
20
WNW
25
NW
20
NW
10
NNW
15
NNW
15
NNW
10
NNW
20
WNW
25
WNW
25
NW
20
NW
15
NNW
15
NNW
15
NNW
15
NNW
20
NW
25
WNW
25
NW
20
NNW
10
NNW
Wind State
glassy
cross-off
cross-off
cross
cross
cross
cross-off
cross-off
cross-off
cross-off
cross-off
cross
cross
cross
cross
cross-off
cross-off
cross-off
cross-off
cross
cross
cross
cross-off
cross-off
High Tide
7:01AM1.33m
4:57PM1.88m
8:32AM1.39m
5:58PM1.89m
9:19AM1.45m
6:56PM1.93m
Low Tide
11:53PM0.64m
10:03AM1.27m
1:01AM0.58m
11:22AM1.34m
1:57AM0.51m
12:43PM1.34m
cloud
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
clear
clear
clear
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:28
6:30
6:31
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:53
7:52
7:51
 mm
Temp °C
13
13
14
18
19
19
17
15
14
14
15
18
18
18
16
14
14
14
14
19
21
20
17
16
Feels °C
13
12
13
16
16
16
14
14
12
12
14
15
15
14
13
12
12
12
12
16
17
16
14
15
  • 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
How to use the Wavefinder 

FREE! Surf-Forecast.com widget for your website

The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our 4 Mile surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.


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