Valnäs - Nord Koster Surf Break

Lat Long: 58.91° N 10.99° E

Valnäs - Nord Koster 48 hour detailed Surf Forecast

Issued: 7 am 20 Sep 2026 (local time)

Forecast update in  hr  min

Today's Valnäs - Nord Koster sea temperature is
15.7°C
1.7° 

Valnäs - Nord Koster surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


How big are the waves at Valnäs - Nord Koster today (20 Sep):

  • Morning surf: Morning surf (20 Sep, local time) - 7ft (2.1m), 7s period with SW swell.
  • Afternoon surf: Afternoon surf (20 Sep, local time) - 7ft (2.1m), 7s period with SW swell.
  • Evening surf: Evening surf (20 Sep, local time) - 5.5ft (1.7m), 7s period with SW swell.

The current surf forecast for Valnäs - Nord Koster at 2PM is: 2.1m 7s primary swell from a Southwest direction (forecast issued at 07:00am September 20). The wind direction is predicted to be cross-shore.

Time (CEST) & DateWave HeightWave Period
Morning (20 Sep)7ft (2.1m)7s
Afternoon (20 Sep)7ft (2.1m)7s
Evening (20 Sep)5.5ft (1.7m)7s

Table - waves today at Valnäs - Nord Koster. (Swell directed towards the surf break)


Short Range Forecast

Mostly dry. Very mild (max 17°C on Mon afternoon, min 10°C on Tue morning). Winds decreasing (strong winds from the W on Sun afternoon, light winds from the WSW by Tue night).

Sunday
20
Monday
21
Tuesday
22
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)
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
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)
2.1
SW
7
2
SW
7
2.1
SW
7
2.1
SW
7
2
SW
7
1.8
SW
7
1.7
WSW
7
1.3
SW
7
1.1
SW
7
0.8
SW
7
0.7
SW
7
0.6
SW
7
0.5
SW
7
0.4
SW
6
0.3
SW
7
0.3
SW
6
0.1
SW
6
0.2
WSW
6
0.1
SW
6
0.1
SW
6
0.1
SW
6
0.1
SW
6
0.1
SW
5
Wave Graph
Metric surfscale
Energy kJ
404
355
420
432
389
322
274
184
118
75
53
30
21
11
7
7
2
4
1
1
1
1
1
Wind (km/h)
40
WSW
40
WSW
45
WSW
45
WSW
50
W
45
WNW
40
WNW
25
NW
20
NW
25
NNW
25
NNW
25
NNW
20
NNW
15
NNE
20
NE
15
N
10
NE
10
NE
10
NE
10
WNW
10
W
5
WSW
5
SSE
Wind State
cross
cross
cross
cross
cross-on
cross-on
cross-on
on
on
on
cross-on
cross-on
on
cross
cross
cross-on
cross-off
cross
cross
on
cross-on
cross
off
High Tide
1:37PM0.28m
2:08AM0.31m
2:15PM0.29m
2:44AM0.31m
2:51PM0.29m
Low Tide
7:59AM0.12m
7:42PM0.08m
8:18AM0.11m
8:12PM0.07m
8:34AM0.09m
8:40PM0.05m
clear
clear
cloud
cloud
part cloud
clear
clear
clear
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
clear
cloud
cloud
part cloud
cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:54
6:56
6:58
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:22
7:20
7:16
 mm
Temp °C
14
14
14
14
16
15
15
14
14
14
14
16
17
17
13
12
11
10
10
12
12
12
12
Feels °C
6
6
5
5
6
6
6
8
8
8
8
9
11
12
8
7
7
7
7
9
9
10
9
  • 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 

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