Valnäs - Nord Koster Surf Break

Lat Long: 58.91° N 10.99° E

Valnäs - Nord Koster 48 hour detailed Surf Forecast

Issued: 1 am 05 Sep 2026 (local time)

Forecast update in  hr  min

Today's Valnäs - Nord Koster sea temperature is
17.5°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 (05 Sep):

  • Morning surf: Morning surf (05 Sep, local time) - 2.5ft (0.7m), 7s period with SW swell.
  • Afternoon surf: Afternoon surf (05 Sep, local time) - 3.5ft (1.0m), 8s period with SW swell.
  • Evening surf: Evening surf (05 Sep, local time) - 2.5ft (0.8m), 8s period with SW swell.

The current surf forecast for Valnäs - Nord Koster at 7AM is: 0.6m 6s primary swell from a Southwest direction (forecast issued at 01:00am September 05). The wind direction is predicted to be onshore.

Time (CEST) & DateWave HeightWave Period
Morning (05 Sep)2.5ft (0.7m)7s
Afternoon (05 Sep)3.5ft (1.0m)8s
Evening (05 Sep)2.5ft (0.8m)8s

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


Short Range Forecast

Light rain (total 9mm), mostly falling on Sun night. Very mild (max 17°C on Sat night, min 13°C on Sat morning). Winds increasing (calm on Sat night, strong winds from the WSW by Sun night).

Saturday
5
Sunday
6
Monday
7
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)
0
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)
0.5
SW
7
0.6
SW
6
0.7
SW
7
0.8
SW
8
1
SW
8
1
SW
8
0.8
SW
8
0.8
SW
8
0.7
SW
7
0.7
SW
7
0.7
SW
7
0.6
SW
7
0.6
SW
7
0.4
SW
7
1.1
SW
7
2.1
SW
7
1.6
SW
6
1.3
SW
6
1.3
SW
5
1.4
SW
5
1.5
SSW
6
1.3
SSW
6
0.8
WSW
6
0.6
SW
7
Wave Graph
Metric surfscale
Energy kJ
0
29
44
79
123
126
86
79
52
45
47
29
29
16
116
371
177
100
0
0
0
0
44
35
Wind (km/h)
10
NE
5
NNW
5
NW
5
NE
10
NNW
15
NW
10
W
15
WSW
10
WSW
0
N
5
N
5
WNW
15
SW
20
SSW
40
WSW
40
WSW
30
SW
35
SW
35
SW
35
SSW
30
S
35
S
40
S
30
SSW
Wind State
cross
glassy
on
glassy
cross-on
on
cross-on
cross-on
cross-on
glassy
glassy
on
cross
cross-off
cross-on
cross
cross
cross
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
High Tide
00:51AM0.29m
1:04PM0.26m
1:40AM0.31m
1:53PM0.29m
2:26AM0.33m
2:38PM0.31m
Low Tide
6:10AM0.10m
6:23PM0.05m
7:12AM0.08m
7:25PM0.03m
8:02AM0.05m
8:18PM0.01m
cloud
cloud
cloud
light rain
part cloud
clear
clear
clear
clear
clear
part cloud
part cloud
part cloud
part cloud
part cloud
cloud
light rain
light rain
light rain
light rain
clear
part cloud
cloud
cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:20
6:22
6:24
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
8:07
8:04
8:00
 mm
1
1
3
3
1
Temp °C
13
13
13
13
14
14
16
17
17
16
15
14
15
16
16
15
15
15
16
15
16
17
17
17
Feels °C
11
12
12
12
12
11
13
14
15
16
15
13
12
12
8
8
10
9
11
10
11
12
11
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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