Valnäs - Nord Koster Surf Break

Lat Long: 58.91° N 10.99° E

Valnäs - Nord Koster 48 hour detailed Surf Forecast

Issued: 1 pm 21 Sep 2026 (local time)

Forecast update in  hr  min

Today's Valnäs - Nord Koster sea temperature is
15.8°C
1.9° 

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 (21 Sep):

  • Morning surf: Morning surf (21 Sep, local time) - 2.5ft (0.8m), 7s period with SW swell.
  • Afternoon surf: Afternoon surf (21 Sep, local time) - 1.5ft (0.5m), 7s period with SW swell.
  • Evening surf: Evening surf (21 Sep, local time) - 1.5ft (0.4m), 6s period with SW swell.

The current surf forecast for Valnäs - Nord Koster at 7PM is: 0.4m 6s primary swell from a Southwest direction (forecast issued at 01:00pm September 21). The wind direction is predicted to be cross-onshore.

Time (CEST) & DateWave HeightWave Period
Morning (21 Sep)2.5ft (0.8m)7s
Afternoon (21 Sep)1.5ft (0.5m)7s
Evening (21 Sep)1.5ft (0.4m)6s

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 11°C on Tue morning). Wind will be generally light.

Mon
21
Tuesday
22
Wednesday
23
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
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.6
SW
7
0.5
SW
7
0.4
SW
7
0.4
SW
6
0.3
SW
7
0.3
SW
6
0.3
SW
6
0.1
SW
6
0.1
SW
6
0.1
SW
6
0.1
SW
6
0.1
SW
5
0.1
SW
5
0.1
SW
5
0.1
SW
5
0.1
SW
5
0.4
SW
4
0.5
S
4
0.5
S
4
0.5
S
4
0.4
S
4
Wave Graph
Metric surfscale
Energy kJ
39
22
15
10
7
7
6
1
1
1
1
1
1
1
1
1
0
0
0
0
0
Wind (km/h)
25
NNW
25
NNW
20
N
15
N
15
NE
10
NNE
10
ENE
10
ENE
5
ESE
5
WSW
10
SW
10
S
15
S
15
SSE
15
SE
15
SE
20
SE
20
SSE
20
SSE
15
SSE
15
ESE
Wind State
on
cross-on
cross-on
cross-on
cross
cross
cross-off
cross-off
glassy
cross
cross
cross-off
cross-off
off
off
off
off
cross-off
cross-off
off
off
High Tide
2:15PM0.29m
2:44AM0.31m
2:51PM0.29m
3:18AM0.29m
3:26PM0.29m
Low Tide
8:18AM0.11m
8:12PM0.07m
8:34AM0.09m
8:40PM0.05m
8:54AM0.07m
9:09PM0.04m
clear
clear
clear
clear
clear
clear
part cloud
clear
clear
part cloud
part cloud
clear
clear
clear
part cloud
cloud
cloud
cloud
cloud
cloud
cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:58
7:01
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:20
7:16
7:14
 mm
Temp °C
14
16
17
17
13
12
12
11
11
13
13
13
13
13
12
11
12
13
13
13
13
Feels °C
8
10
11
12
9
9
8
8
9
10
10
10
10
10
8
7
8
9
9
10
10
  • 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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