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Asa Surf Forecast
/ Kattegat and Skagerrack (6 surf breaks) /
Surf Forecasts:
Asa surfForecast / Kattegat and Skagerrack / Sweden
12 Day Weather and Surf, issued 7 pm Thursday 18 Sep 2025 CEST
Best Forecast Surf Conditions for Asa this week:
The most powerful waves expected at Asa in the next 12 days are 2.1m 6s and forecast to arrive on Sunday (Sep 21) at 5PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 5s period and expected on Tuesday (Sep 23) at 8AM.
| Wave Type | Time (CEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 5PM (Sun 21st Sep) | 7ft (2.1m) 6s |
Table - best surf conditions forecast for Asa over the next 12 days.
Short Range Forecast Moderate rain (total 10mm), heaviest on Sat night. Very mild (max 18°C on Fri afternoon, min 15°C on Thu night). Winds increasing (light winds from the S on Sat night, strong winds from the SSW by Sun afternoon). | Days 3-6 Weather Summary Light rain (total 7mm), mostly falling on Mon night. Very mild (max 14°C on Sun night, min 9°C on Mon morning). Winds decreasing (strong winds from the W on Mon night, calm by Tue night). | |||||||||||||||||||||
Friday 19 | Saturday 20 | Sunday 21 | Monday 22 | Tuesday 23 | Wednesday 24 | Thu 25 | ||||||||||||||||
| Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | ||
Rating (10 max) | ||||||||||||||||||||||
Swell Height Map |  |  |  |  |  |  |  |  | ||||||||||||||
| Wave Height (m) & direction (?) | — | — | — | |||||||||||||||||||
| Period(s) (?) | 5 | 5 | 5 | 5 | 5 | 5 | 4 | 4 | 6 | 6 | 7 | 4 | 6 | 5 | 5 | 4 | 7 | - | - | 4 | - | |
Wave (?)Graph  | ||||||||||||||||||||||
 kJ (?) | 126 | 109 | 56 | 44 | 64 | 27 | 8 | 19 | 188 | 136 | 109 | 18 | 312 | 21 | 3 | 4 | 1 | 0 | 0 | 1 | 0 | |
Wind (km/h) | ||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- on | cross- on | on | on | on | cross- on | cross- on | cross- on | on | cross | cross- off | cross- on | cross- on | cross- off | cross- off | glass | cross | cross- on | off | off | cross | |
High Tide / height (m) | 5:55AM 0.14 | 5:52PM 0.14 | 6:31AM 0.13 | 6:34PM 0.13 | 7:05AM 0.11 | 7:15PM 0.12 | 7:40AM 0.10 | 8:00PM 0.11 | 8:21AM 0.08 | 8:52PM 0.11 | 9:01AM 0.08 | 9:55PM 0.10 | 9:54AM 0.08 | |||||||||
Low Tide / height (m) | 11:30PM 0.00 | 11:48AM 0.03 | 12:11AM -0.00 | 12:20PM 0.02 | 12:52AM 0.00 | 12:52PM 0.01 | 1:33AM 0.01 | 1:25PM 0.01 | 2:17AM 0.01 | 2:03PM 0.01 | 3:08AM 0.03 | 2:49PM 0.02 | 4:19AM 0.04 | 3:51PM 0.03 | ||||||||
Friday 19 | Saturday 20 | Sunday 21 | Monday 22 | Tuesday 23 | Wednesday 24 | Thu 25 | ||||||||||||||||
| Sunrise | - | 6:48 | - | - | 6:50 | - | - | 6:52 | - | - | 6:54 | - | - | 6:56 | - | - | 6:58 | - | - | 7:01 | - | |
| Sunset | - | - | 7:21 | - | - | 7:17 | - | - | 7:15 | - | - | 7:12 | - | - | 7:08 | - | - | 7:07 | - | - | 7:04 | |
 |  | | | | |  |  |  | |  | | | | |  | | | | | | ||
Rain (mm) | - | - | - | - | - | - | 8 | 2 | - | - | - | - | 7 | - | - | - | - | - | - | - | - | |
| Temp. °C | 16 | 16 | 18 | 18 | 17 | 18 | 17 | 17 | 16 | 14 | 12 | 14 | 14 | 11 | 13 | 12 | 12 | 13 | 13 | 11 | 12 | |
| Feels °C (?) | 10 | 12 | 15 | 15 | 14 | 16 | 15 | 12 | 9 | 6 | 6 | 8 | 5 | 6 | 8 | 8 | 9 | 10 | 9 | 8 | 8 | |
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
Recent Eyeball Surf Reports for Kattegat and Skagerrack
The wind is still cross-on at Asa (fresh winds from the W at Nidingen 10 km from Asa). 1.4m 5s windswell from the WSW to make surfable waves.
1 h 55 min ago
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 Asa 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.
Information about the Asa Surf forecast
The above surf forecast table for Asa provides essential information for determining whether the surfing conditions will be good over the next 12 days. A general guide to surfing at Asa can be found by selecting the local surf guide option on the grey menu. Our Asa 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 (Asa) 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 Asa 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.
Asa is 17 km (11 miles) from Kungsbacka. If you plan a holiday in Kattegat and Skagerrack, look for hotels and other accommodation in Kungsbacka. Kungsbacka has rooms for a wide range of budgets as well as car hire and transport links.
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