Valnäs - Nord Koster Surf Break

Lat Long: 58.91° N 10.99° E

Valnäs - Nord Koster 48 hour detailed Surf Forecast

Issued: 1 pm 18 Sep 2026 (local time)

Forecast update in  hr  min

Today's Valnäs - Nord Koster sea temperature is
15.8°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 (18 Sep):

  • Afternoon surf: Afternoon surf (18 Sep, local time) - 6ft (1.8m), 6s period with SW swell.
  • Evening surf: Evening surf (18 Sep, local time) - 7ft (2.1m), 7s period with SW swell.

The current surf forecast for Valnäs - Nord Koster at 5PM is: 2.0m 7s primary swell from a Southwest direction (forecast issued at 01:00pm September 18). The wind direction is predicted to be cross-shore.

Time (CEST) & DateWave HeightWave Period
Morning (18 Sep)--
Afternoon (18 Sep)6ft (1.8m)6s
Evening (18 Sep)7ft (2.1m)7s

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


Short Range Forecast

Light rain (total 3mm), mostly falling on Fri afternoon. Very mild (max 16°C on Sat afternoon, min 13°C on Sat night). Winds decreasing (near gales from the SW on Sat afternoon, moderate winds from the NNW by Mon morning).

Fri
18
Saturday
19
Sunday
20
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)
1.6
SW
6
1.6
SW
6
2
SW
7
2.1
SW
7
2
SW
7
2
SW
7
1.8
SW
6
1.9
SW
6
2.1
SW
7
2.2
SW
7
3
SW
7
2.5
SW
8
2.1
SW
7
2.1
SW
7
2.1
SW
7
2.2
SW
7
2.1
SW
7
1.9
SW
7
1.8
SW
7
1.6
SW
7
1.7
SW
7
Wave Graph
Metric surfscale
Energy kJ
178
200
347
470
377
355
282
0
374
0
799
776
483
428
404
449
416
361
308
230
268
Wind (km/h)
40
SW
40
WSW
45
WSW
45
WSW
45
WSW
45
SW
40
SW
40
SW
50
SW
45
SW
55
SW
50
WSW
45
WSW
45
WSW
45
WSW
45
WSW
45
WSW
50
WSW
55
W
45
W
40
WNW
Wind State
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross-on
cross-on
cross-on
cross-on
High Tide
12:05PM0.25m
00:43AM0.30m
12:54PM0.27m
1:28AM0.31m
1:37PM0.28m
Low Tide
5:59PM0.10m
7:28AM0.13m
7:02PM0.10m
7:59AM0.12m
7:42PM0.08m
light rain
clear
rain showers
clear
cloud
cloud
cloud
light rain
light rain
cloud
cloud
clear
part cloud
part cloud
cloud
part cloud
clear
part cloud
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:52
6:54
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:29
7:25
7:22
 mm
1
1
1
1
Temp °C
14
14
15
15
14
14
14
15
15
16
16
15
14
14
13
13
14
15
15
15
14
Feels °C
6
6
6
6
5
6
6
8
6
8
6
6
5
5
4
4
5
5
4
6
5
  • 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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