Surf Forecasts:
Valnäs - Nord Koster surf forecast from 12 Sep 2026:
- Most powerful swell: Saturday 19 Sep, 8PM (local time) - 10ft (3.0m), 8s period, SW swell with 979 kJ wave energy.
Best Forecast Surf Conditions for Valnäs - Nord Koster this week:
The most powerful waves expected at Valnäs - Nord Koster in the next 16 days are 3.0m 8s and forecast to arrive on Saturday (Sep 19) at 8PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.5m 8s period and expected on Saturday (Sep 19) at 5PM.
| Wave Type | Time (CEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 8PM (Sat 19th Sep) | 10ft (3.0m) 8s |
Table - best surf conditions forecast for Valnäs - Nord Koster over the next 16 days.
Short Range ForecastModerate rain (total 12mm), heaviest on Tue afternoon. Very mild (max 16°C on Sun afternoon, min 13°C on Sun night). Winds decreasing (strong winds from the SSW on Sat night, calm by Sun afternoon). | Days 5-7 Weather SummaryModerate rain (total 13mm), heaviest on Tue night. Very mild (max 16°C on Tue night, min 13°C on Thu night). Winds decreasing (near gales from the WSW on Thu afternoon, moderate winds from the WSW by Fri morning). | ||||||||||||||||||
Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | ||||||||||||||
Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map |  |  |  |  |  |  |  | ||||||||||||
Wave Height (m) Direction Period (s) | SW 6 | SW 6 | SW 6 | SW 7 | SW 6 | SW 6 | SW 4 | SSW 5 | SSW 6 | SW 6 | SSW 6 | SSW 7 | SW 8 | SW 7 | SW 7 | SW 7 | SW 6 | SW 5 | SW 6 |
Wave Graph  | |||||||||||||||||||
 kJ | 0 | 0 | 33 | 17 | 6 | 6 | 0 | 0 | 0 | 0 | 0 | 0 | 519 | 121 | 0 | 261 | 0 | 23 | 193 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-on | glassy | cross-off | off | cross-off | cross | cross-off | cross-off | cross | cross | cross | cross | cross-on | cross | cross | cross | cross | cross |
High Tide | 6:55AM0.24m | 7:27PM0.27m | 7:54AM0.23m | 8:32PM0.26m | 8:59AM0.22m | 9:42PM0.26m | 10:06AM0.22m | 10:49PM0.27m | 11:09AM0.24m | 11:50PM0.28m | 12:05PM0.25m | 00:43AM0.30m | |||||||
Low Tide | 00:08AM0.00m | 12:20PM0.01m | 00:55AM0.03m | 1:07PM0.03m | 1:48AM0.07m | 2:01PM0.06m | 2:51AM0.10m | 3:04PM0.09m | 4:22AM0.13m | 4:24PM0.10m | 6:36AM0.13m | 5:59PM0.10m | |||||||
 |  |  |  |  | |  |  |  | | | | | | | | |  | | |
 | — | 6:39 | — | — | 6:41 | — | — | 6:43 | — | — | 6:45 | — | — | 6:47 | — | — | 6:50 | — | — |
 | 7:45 | — | 7:43 | — | — | 7:39 | — | — | 7:37 | — | — | 7:35 | — | — | 7:31 | — | — | 7:29 | — |
mm | 2 | — | — | — | — | — | — | 2 | 8 | 12 | — | — | — | — | — | — | — | 1 | 1 |
Temp °C | 15 | 15 | 16 | 16 | 14 | 14 | 14 | 14 | 15 | 16 | 15 | 15 | 14 | 14 | 15 | 14 | 14 | 15 | 15 |
Feels °C | 10 | 13 | 17 | 14 | 12 | 11 | 11 | 8 | 8 | 11 | 9 | 7 | 5 | 9 | 8 | 5 | 9 | 7 | 7 |
Swell 1 Height (m) Direction Period (s) | — | SW 6 | SW 6 | SW 7 | SW 6 | SW 6 | — | — | — | — | — | — | SW 8 | SW 7 | SW 7 | — | SW 6 | SW 5 | — |
| kJ | — | 71 | 33 | 17 | 6 | 6 | — | — | — | — | — | — | 269 | 121 | 65 | — | 46 | 23 | — |
Swell 2 Height (m) Direction Period (s) | — | SSE 5 | SSE 5 | S 4 | — | — | — | — | — | — | — | — | — | — | — | — | — | S 5 | — |
| kJ | — | 8 | 5 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | 5 | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | SW 6 | — | N 2 | — | — | — | SW 4 | SSW 5 | SSW 6 | SW 6 | SSW 6 | SSW 7 | SW 8 | — | — | SW 7 | — | — | SW 6 |
| kJ | 147 | — | 1 | — | — | — | 22 | 103 | 130 | 188 | 202 | 251 | 519 | — | — | 261 | — | — | 193 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 791 | 66 | 809 | 479 | 312 | 479 | 479 | 482 | 482 | 484 | 479 | 846 | 845 | 479 | 254 | 865 | 479 | 1060 | 498 |
Best forecast wave conditions in Kattegat and Skagerrack | |||||||||||||||||||
Best forecast wave conditions in Sweden | |||||||||||||||||||
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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 16 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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