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Surf Forecasts:

Valnäs - Nord Koster surfForecast / Kattegat and Skagerrack / Sweden

information circle12 Day Weather and Surf, issued 1 am Sunday 14 Sep 2025 CEST
Forecast update in hr  min  s Forecast update imminent
Valnäs - Nord Koster surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Valnäs - Nord Koster sea temperature is
17.3° C
 (Which is 2.6°C warmer than normal for this time of year)

Best Forecast Surf Conditions for Valnäs - Nord Koster this week:

The surf forecast for Valnäs - Nord Koster over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Sep 16) at 11AM. The primary swell is predicted to be 1.2m and 9s period with a secondary swell of 0.3m and 2s. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Valnäs - Nord Koster in the next 12 days are 2.5m 8s and forecast to arrive on Wednesday (Sep 17) at 5AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.4m 7s period and expected on Monday (Sep 15) at 11PM.

Wave TypeTime (CEST) & Date Wave Height & Period
Next good surf (1 star+)11AM (Tue 16th Sep)4ft (1.2m) 9s
Best Surf11AM (Tue 16th Sep)4ft (1.2m) 9s
Most Powerful 5AM (Wed 17th Sep)8ft (2.5m) 8s

Table - best surf conditions forecast for Valnäs - Nord Koster over the next 12 days.

Updates in  hr  min  s Forecast update imminent 
12 DaysHourly
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Short Range Forecast Heavy rain (total 35mm), heaviest during Sun afternoon. Very mild (max 15°C on Sun night, min 12°C on Sun morning). Winds decreasing (strong winds from the SW on Mon night, calm by Tue afternoon).

Days 3-6 Weather Summary Moderate rain (total 15mm), heaviest on Thu morning. Very mild (max 15°C on Wed afternoon, min 11°C on Fri afternoon). Winds increasing (light winds from the W on Wed morning, strong winds from the WSW by Wed night).

Sunday
14
Monday
15
Tuesday
16
Wednesday
17
Thursday
18
Friday
19
Saturday
20
AMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNight
Rating
(10 max)
0
0
0
0
0
0
1
1
1
1
0
0
0
0
0
0
0
0
0
0
0
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
0.7
SW
0.6
SW
0.4
SW
0.3
SW
0.3
SW
2.2
SSW
1.3
SW
1
SW
2
SW
2.1
WSW
0.3
SW
1.9
SW
1.4
SW
2.3
SW
2.1
SW
1.1
SW
0.7
SW
0.4
SW
0.3
SW
0.3
SW
0.1
SW
Period(s) (?)777668998788678888676
Wave
Graph
(?)Metric surfscale
Energy kJ (?)453016650281163446403104241234944641596621772
Wind
(km/h)
25
SE
15
SE
15
SW
20
SSE
45
SE
40
SSW
25
S
5
W
10
WSW
5
W
10
WSW
35
SW
10
SW
10
WNW
15
W
15
W
20
N
20
W
15
NNW
10
W
15
SSW
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
offoffcrossoffoffcross-
off		cross-
off		glasscrosscross-
on		crosscrosscrossoncross-
on		cross-
on		cross-
on		cross-
on		cross-
on		cross-
on		cross-
off
High Tide
/ height (m)
11:54AM
0.26
12:34AM
0.31
12:52PM
0.28
1:29AM
0.33
1:44PM
0.30
2:18AM
0.34
2:31PM
0.32
3:02AM
0.34
3:15PM
0.32
3:44AM
0.32
3:56PM
0.31
4:23AM
0.30
4:35PM
0.30
5:00AM
0.28
Low Tide
/ height (m)
5:12PM
0.05
6:16AM
0.08
6:29PM
0.04
7:20AM
0.07
7:31PM
0.03
8:09AM
0.05
8:21PM
0.01
8:49AM
0.04
9:05PM
0.00
9:26AM
0.02
9:45PM
-0.00
10:00AM
0.02
10:23PM
-0.00
Sunday
14
Monday
15
Tuesday
16
Wednesday
17
Thursday
18
Friday
19
Saturday
20
Sunrise6:41--6:43--6:45--6:47--6:50--6:52--6:54--
Sunset-7:39--7:37--7:35--7:31--7:29--7:25--7:22-
rain showers
mod rain
rain showers
rain showers
mod rain
mod rain
rain showers
part cloud
rain showers
clear
clear
light rain
light rain
light rain
rain showers
light rain
rain showers
clear
clear
part cloud
light rain
Rain (mm)
2731884-2--343122---2
Temp. °C141415141515141515141515141314141213111212
Feels °C (?)111012108710141313111212121211810788
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
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Eyeball surf reportRecent Eyeball Surf Reports for Kattegat and Skagerrack

  1. weather stationWind Update The wind is still cross-off at Valnäs - Nord Koster (moderate winds from the ESE at Stromtangen Lighthouse 28 km from Valnäs - Nord Koster). 0.7m 7s swell from the SW with a 0.4m 7s swell, also from the SW. 2 swells combining to make bigger set waves.

    1 hour 13 minutes ago Valnäs - Nord Koster
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28 km away, 1 h 13 min ago

22 km/h
ESE
0.0
17.3
Air / Water (°C)
Please reload the page to see if there are any updates.

FREE! Surf-Forecast.com widget for your website

The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Valnäs - Nord Koster surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.

View detailed surf forecast for Valnäs - Nord Koster at:
surf-forecast.com

Information about the Valnäs - Nord Koster Surf forecast

The above surf forecast table for Valnäs - Nord Koster provides essential information for determining whether the surfing conditions will be good over the next 12 days. A general guide to surfing at Valnäs - Nord Koster can be found by selecting the local surf guide option on the grey menu. Our Valnäs - Nord Koster surf forecast is unique since it includes wave energy (power) that defines the real feel of the surf rather than just the height or the period. If you surf the same spot (Valnäs - Nord Koster) regularly then make a mental note of the wave energy from the surf forecast table each time you go. Very soon you may start to choose your surf days based on the wave energy alone combined with our forecast of favourable offshore wind conditions. Our star ratings will help here and of course you will also find the usual wave height and period predictions on our surf forecasts as well as a full break down of the swell components under our advanced users option (to reveal that, click the little Einstein character under the tide times).

Further information to help with frequently asked questions about our surf forecast for Valnäs - Nord Koster may be found under the help tab on the top menu and also by moving your mouse over the question marks on the surf forecast table itself. Please always bear in mind that the forecast is for near-shore open water and local factors at each surf break influence the actual breaking wave height, such as the beach / reef profile, water depths offshore and shelter.

Valnäs - Nord Koster is 32 km (20 miles) from Fredrikstad. If you plan a holiday in Kattegat and Skagerrack, look for hotels and other accommodation in Fredrikstad. Fredrikstad has rooms for a wide range of budgets as well as car hire and transport links.

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