Surf Forecasts:
Asa surf forecast from 18 Sep 2026:
- Best quality surf: Thursday 24 Sep, 5PM (local time) - 4.5ft (1.4m), 5s period, W swell with glassy winds.
- Most powerful swell: Monday 21 Sep, 2AM (local time) - 8ft (2.5m), 8s period, WNW swell with 766 kJ wave energy.
- Next surfable swell (1★+): Thursday 24 Sep, 5PM (local time) - 4.5ft (1.4m), 5s period with W swell.
Best Forecast Surf Conditions for Asa this week:
The surf forecast for Asa over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Thursday (Sep 24) at 5PM. The primary swell is predicted to be 1.4m and 5s period. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Asa in the next 16 days are 2.5m 8s and forecast to arrive on Monday (Sep 21) at 2AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.2m 5s period and expected on Thursday (Sep 24) at 11PM.
| Wave Type | Time (CEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5PM (Thu 24th Sep) | 4.5ft (1.4m) 5s |
| Best Surf | 5PM (Thu 24th Sep) | 4.5ft (1.4m) 5s |
| Most Powerful | 2AM (Mon 21st Sep) | 8ft (2.5m) 8s |
Table - best surf conditions forecast for Asa over the next 16 days.
Short Range ForecastModerate rain (total 12mm), heaviest on Sat afternoon. Very mild (max 17°C on Sat afternoon, min 13°C on Sun morning). Mainly strong winds. | Days 5-7 Weather SummaryModerate rain (total 14mm), heaviest on Wed night. Very mild (max 15°C on Mon afternoon, min 12°C on Tue morning). Winds decreasing (fresh winds from the NW on Mon afternoon, light winds from the NE by Tue morning). | |||||||||||||||||||
Fri 18 | Saturday 19 | Sunday 20 | Monday 21 | Tuesday 22 | Wednesday 23 | Thursday 24 | ||||||||||||||
PM | 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) | WSW 5 | WSW 5 | SW 6 | SSW 6 | WSW 6 | WSW 6 | W 6 | WNW 8 | WNW 7 | NW 6 | NW 5 | WNW 8 | W 7 | W 5 | S 2 | S 3 | S 3 | SSW 4 | WSW 5 | NW 6 |
Wave Graph  | ||||||||||||||||||||
 kJ | 94 | 82 | 240 | 233 | 188 | 161 | 212 | 766 | 559 | 126 | 7 | 6 | 1 | 1 | 1 | 5 | 5 | 39 | 66 | 31 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | on | on | on | cross-on | cross-on | cross-on | cross-on | cross | cross | off | off | cross | cross | cross | cross-on | on | cross-on | on | glassy |
High Tide | 2:14PM0.11m | 3:25AM0.15m | 3:03PM0.12m | 4:07AM0.15m | 3:44PM0.13m | 4:41AM0.15m | 4:20PM0.14m | 5:10AM0.15m | 4:54PM0.14m | 5:36AM0.13m | 5:27PM0.13m | 6:01AM0.12m | 6:01PM0.13m | |||||||
Low Tide | 8:31PM0.03m | 9:38AM0.07m | 9:20PM0.03m | 10:13AM0.07m | 10:03PM0.03m | 10:43AM0.06m | 10:42PM0.03m | 11:08AM0.05m | 11:18PM0.02m | 11:31AM0.04m | 11:53PM0.02m | 11:53AM0.03m | 00:26AM0.02m | |||||||
 |  |  | |  | |  | |  | |  | | |  | |  | | | | | |
 | — | — | 6:48 | — | — | 6:50 | — | — | 6:52 | — | — | 6:54 | — | — | 6:56 | — | — | 6:58 | — | — |
 | 7:22 | — | — | 7:21 | — | — | 7:17 | — | — | 7:15 | — | — | 7:12 | — | — | 7:08 | — | — | 7:07 | — |
mm | 2 | 1 | 1 | 3 | 1 | 1 | 2 | 1 | — | — | — | — | — | — | — | — | 14 | — | — | — |
Temp °C | 15 | 14 | 16 | 17 | 17 | 14 | 14 | 13 | 14 | 15 | 15 | 13 | 15 | 14 | 13 | 14 | 15 | 14 | 13 | 14 |
Feels °C | 9 | 8 | 10 | 11 | 11 | 7 | 6 | 4 | 7 | 8 | 11 | 10 | 12 | 11 | 9 | 10 | 13 | 11 | 12 | 13 |
Swell 1 Height (m) Direction Period (s) | NW 8 | WNW 5 | — | WNW 8 | — | — | — | — | — | — | NW 5 | WNW 8 | W 7 | — | — | — | — | — | — | NW 6 |
| kJ | 3 | 19 | — | 13 | — | — | — | — | — | — | 6 | 6 | 1 | — | — | — | — | — | — | 31 |
Swell 2 Height (m) Direction Period (s) | — | WNW 8 | — | W 6 | — | — | — | — | — | — | WNW 9 | NW 4 | — | W 5 | — | — | — | — | — | WSW 4 |
| kJ | — | 7 | — | 1 | — | — | — | — | — | — | 7 | 1 | — | 1 | — | — | — | — | — | 1 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | NW 9 | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | 3 | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | WSW 5 | WSW 5 | SW 6 | SSW 6 | WSW 6 | WSW 6 | W 6 | WNW 8 | WNW 7 | NW 6 | — | — | — | — | S 2 | S 3 | S 3 | SSW 4 | WSW 5 | NNE 3 |
| kJ | 94 | 82 | 240 | 233 | 188 | 161 | 212 | 766 | 559 | 126 | — | — | — | — | 1 | 5 | 5 | 39 | 66 | 1 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 684 | 684 | 1072 | 1072 | 1104 | 1104 | 1153 | 875 | 902 | 835 | 662 | 328 | 328 | 416 | 416 | 901 | 658 | 658 | 328 | 139 |
Best forecast wave conditions in Kattegat and Skagerrack | ||||||||||||||||||||
Best forecast wave conditions in Sweden | ||||||||||||||||||||
Header Global | ||||||||||||||||||||
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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 16 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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