Valnäs - Nord Koster Surf Break

Lat Long: 58.91° N 10.99° E

Valnäs - Nord Koster 48 hour detailed Surf Forecast

Issued: 1 am 10 Aug 2026 (local time)

Forecast update in  hr  min

Today's Valnäs - Nord Koster sea temperature is
17.2° C
0.4° 

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 (10 Aug):

  • Morning surf: Morning surf (10 Aug, local time) - 5ft (1.6m), 6s period with SW swell.
  • Afternoon surf: Afternoon surf (10 Aug, local time) - 5ft (1.6m), 6s period with SW swell.
  • Evening surf: Evening surf (10 Aug, local time) - 4.5ft (1.4m), 7s period with SW swell.

The current surf forecast for Valnäs - Nord Koster at 9AM is: 1.6m 6s primary swell from a Southwest direction (forecast issued at 01:00am August 10). An open ocean swell of 0.3m 5s is not directed at the surf break. The wind direction is predicted to be cross-onshore.

Time (CEST) & DateWave HeightWave Period
Morning (10 Aug)5ft (1.6m)6s
Afternoon (10 Aug)5ft (1.6m)6s
Evening (10 Aug)4.5ft (1.4m)7s

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


Short Range Forecast

Mostly dry. Very mild (max 19°C on Mon afternoon, min 14°C on Mon night). Winds decreasing (strong winds from the W on Mon morning, light winds from the NW by Tue morning).

Monday
10
Tuesday
11
Wednesday
12
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)
1.3
SSW
5
1.4
SW
6
1.6
SW
6
1.7
SW
6
1.7
SW
6
1.5
SW
6
1.4
SW
7
1.8
WSW
7
1.1
SW
7
0.8
SW
7
0.7
SW
6
0.6
SW
6
0.4
SW
6
0.4
SW
5
0.3
SW
5
0.4
SW
4
0.4
SW
4
0.3
SW
4
0.3
SW
6
0.4
SW
5
0.4
SW
5
0.3
SSW
4
0.3
SW
5
0.2
SSW
4
Wave Graph
Metric surfscale
Energy kJ
0
127
167
205
210
172
171
315
116
61
41
24
12
0
4
4
5
2
5
0
0
0
3
0
Wind (km/h)
35
SW
40
WSW
50
W
45
WSW
45
SW
40
WSW
35
W
30
NW
25
N
15
NNE
15
NW
10
NW
15
WSW
20
SW
20
SW
15
SSW
15
SE
20
SE
15
SE
15
S
20
SSW
15
SSW
15
S
20
S
Wind State
cross
cross
cross-on
cross-on
cross
cross-on
cross-on
on
cross-on
cross-on
on
on
cross
cross
cross
cross-off
off
off
off
cross-off
cross-off
cross-off
cross-off
cross-off
High Tide
3:26AM0.33m
3:39PM0.31m
4:10AM0.34m
4:26PM0.32m
4:56AM0.33m
5:14PM0.32m
Low Tide
9:02AM0.04m
9:17PM-0.00m
9:49AM0.02m
10:07PM-0.01m
10:34AM-0.00m
10:56PM-0.02m
cloud
light rain
clear
clear
clear
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
part cloud
clear
part cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:22
5:24
5:26
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
9:17
9:15
9:13
 mm
1
Temp °C
16
16
15
15
17
19
19
17
16
14
15
15
16
17
17
16
15
14
14
15
15
15
16
16
Feels °C
9
9
5
6
8
11
12
11
11
11
12
12
12
13
14
14
12
11
12
12
12
13
13
13
  • 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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