Cape Sebastian Surf Break

Lat Long: 42.32° N 124.42° W

Cape Sebastian 48 hour detailed Surf Forecast

Issued: 4 am 18 Aug 2026 (local time)

Forecast update in  hr  min

Today's Cape Sebastian sea temperature is
12.9° C
1.3° 

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


How big are the waves at Cape Sebastian today (18 Aug):

  • Morning surf: Morning surf (18 Aug, local time) - 2.5ft (0.7m), 14s period with SW swell.
  • Afternoon surf: Afternoon surf (18 Aug, local time) - 2ft (0.6m), 14s period with SSW swell.
  • Evening surf: Evening surf (18 Aug, local time) - 2.5ft (0.7m), 15s period with SW swell.

The current surf forecast for Cape Sebastian at 9AM is: 0.7m 14s primary swell from a Southwest direction and 0.4m 8s secondary swell from a West-northwest direction (forecast issued at 04:00am August 18). An open ocean swell of 0.9m 6s is not directed at the surf break. The wind direction is predicted to be cross-offshore.

Time (PDT) & DateWave HeightWave Period
Morning (18 Aug)2.5ft (0.7m)14s
Afternoon (18 Aug)2ft (0.6m)14s
Evening (18 Aug)2.5ft (0.7m)15s

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


Short Range Forecast

Mostly dry. Warm (max 20°C on Tue afternoon, min 13°C on Wed night). Winds decreasing (fresh winds from the NNW on Tue afternoon, calm by Thu morning).

Tuesday
18
Wednesday
19
Thursday
20
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
3
3
2
3
1
1
1
2
3
3
3
3
2
3
3
2
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
0.7
SW
15
0.7
SW
14
0.7
SW
14
0.6
SSW
14
0.6
SSW
14
0.7
SW
14
0.7
SW
15
0.8
SSW
16
0.8
SSW
16
0.8
SSW
16
0.9
WNW
12
0.9
WNW
12
0.7
SW
15
0.9
WNW
12
0.8
SSW
15
0.8
SSW
15
0.8
SSW
15
0.8
SSW
15
0.9
WNW
11
1.2
WNW
11
0.9
WNW
11
0.9
WNW
11
0.7
SW
14
Wave Graph
Metric surfscale
Energy kJ
272
217
214
208
131
133
211
239
322
326
322
258
237
242
233
272
288
288
278
217
319
206
191
200
Wind (km/h)
10
N
15
N
15
N
25
NNW
25
NNW
30
NNW
30
N
20
N
15
N
20
N
20
N
25
NNW
30
NNW
25
NNW
20
NNW
5
N
5
N
5
NNW
0
NNW
10
NW
15
NW
15
NW
10
NNW
5
N
Wind State
off
off
cross-off
cross-off
cross-off
cross-off
cross-off
off
off
cross-off
off
cross-off
cross-off
cross-off
cross-off
glassy
off
glassy
glassy
cross-off
cross-off
cross-off
cross-off
cross-off
High Tide
4:28AM2.09m
4:18PM2.63m
5:38AM1.92m
4:59PM2.54m
7:07AM1.84m
5:49PM2.47m
Low Tide
9:53AM1.22m
11:21PM0.84m
10:29AM1.43m
00:26AM0.86m
11:14AM1.60m
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
part cloud
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
part cloud
part cloud
part cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:26
6:28
6:28
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
8:14
8:13
8:10
 mm
Temp °C
14
15
16
19
19
20
19
16
14
15
16
20
19
19
16
14
13
13
14
16
17
17
14
14
Feels °C
13
13
14
16
15
15
14
12
11
11
13
16
15
15
13
14
13
13
14
15
16
16
14
14
  • 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 Cape Sebastian 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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