Valnäs - Nord Koster Surf Break

Lat Long: 58.91° N 10.99° E

Valnäs - Nord Koster 48 hour detailed Surf Forecast

Issued: 7 pm 11 Sep 2026 (local time)

Forecast update in  hr  min

Today's Valnäs - Nord Koster sea temperature is
16.5°C
1.5° 

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 (12 Sep):

  • Morning surf: Morning surf (12 Sep, local time) - 2ft (0.6m), 7s period with SW swell.
  • Afternoon surf: Afternoon surf (12 Sep, local time) - 3.5ft (1.1m), 6s period with SW swell.
  • Evening surf: Evening surf (12 Sep, local time) - 5ft (1.6m), 6s period with SW swell.

The current surf forecast for Valnäs - Nord Koster at 1AM is: 0.8m 6s primary swell from a Southwest direction (forecast issued at 07:00pm September 11). An open ocean swell of 0.5m 5s is not directed at the surf break, a second open ocean swell of 0.5m 5s is not directed at the surf break. The wind direction is predicted to be cross-shore.

Time (CEST) & DateWave HeightWave Period
Morning (12 Sep)2ft (0.6m)7s
Afternoon (12 Sep)3.5ft (1.1m)6s
Evening (12 Sep)5ft (1.6m)6s

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


Short Range Forecast

Light rain (total 3mm), mostly falling on Fri night. Very mild (max 17°C on Sun afternoon, min 12°C on Mon morning). Mainly strong winds.

Fri
11
Saturday
12
Sunday
13
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
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.4
SSW
6
1.3
SSW
6
0.9
SW
6
0.8
SW
6
0.6
SW
7
0.6
SW
7
0.6
SW
7
0.9
SW
7
1.8
SW
6
1.6
SW
6
1.7
SW
6
1.6
SW
6
1.3
SW
6
1.1
SW
6
0.3
NNW
2
0.7
SW
6
0.6
SW
7
0.6
SW
7
0.4
SW
7
Wave Graph
Metric surfscale
Energy kJ
0
0
62
43
29
29
28
0
228
196
219
184
0
80
1
41
28
30
17
Wind (km/h)
35
S
30
SSW
20
SW
10
WSW
5
SSW
10
S
25
SSW
35
SW
40
SW
40
SW
30
SW
35
WSW
30
WSW
10
NNW
10
NNE
10
NW
10
NW
5
SSE
15
SSE
Wind State
cross-off
cross-off
cross
cross
glassy
cross-off
cross-off
cross
cross
cross
cross
cross
cross
on
cross
on
on
glassy
cross-off
High Tide
5:38PM0.30m
6:04AM0.26m
6:29PM0.28m
6:55AM0.24m
7:27PM0.27m
Low Tide
11:22PM-0.02m
11:36AM-0.01m
00:08AM0.00m
12:20PM0.01m
light rain
rain showers
rain showers
clear
clear
part cloud
part cloud
cloud
cloud
light rain
part cloud
clear
part cloud
part cloud
clear
clear
part cloud
part cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:35
6:39
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:49
7:45
7:43
 mm
3
1
1
1
Temp °C
15
15
16
16
15
15
14
14
14
14
15
15
15
14
14
16
17
16
15
Feels °C
9
10
14
15
15
14
9
7
6
6
10
10
10
13
13
14
14
15
12
  • 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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