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Surf Forecasts:
Asakawa surfForecast / Shikoku / Japan
16 Day Weather and Surf, issued 8 pm Monday 18 May 2026 JSTForecast update in hr min s Forecast update imminent
Asakawa surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Asakawa sea temperature is
21.3° C
(Which is normal for this time of year)Best Forecast Surf Conditions for Asakawa this week:
The surf forecast for Asakawa over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (May 19) at 3AM. The primary swell is predicted to be 0.8m and 10s period with a secondary swell of 0.4m and 4s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Asakawa in the next 16 days are 3.0m 8s and forecast to arrive on Sunday (May 24) at 6PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.4m 5s period and expected on Friday (May 22) at 3PM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3AM (Tue 19th May) | 2.5ft (0.8m) 10s |
| Best Surf | 12AM (Fri 22nd May) | 7.5ft (2.3m) 8s |
| Most Powerful | 6PM (Sun 24th May) | 10ft (3.0m) 8s |
Table - best surf conditions forecast for Asakawa over the next 16 days.
Updates in hr min s Forecast update imminent
Short Range ForecastHeavy rain (total 24mm), heaviest during Thu morning. Warm (max 24°C on Tue morning, min 18°C on Mon night). Winds increasing (calm on Wed morning, fresh winds from the SW by Thu morning). | Days 5-7 Weather SummaryHeavy rain (total 52mm), heaviest during Sat night. Warm (max 24°C on Fri morning, min 19°C on Thu night). Wind will be generally light. | ||||||||||||||||||||
Tuesday 19 | Wednesday 20 | Thursday 21 | Friday 22 | Saturday 23 | Sunday 24 | Mon 25 | |||||||||||||||
Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | |
Swell Height Map |  |  |  |  |  |  |  |  | |||||||||||||
ESE 10 | SE 10 | ESE 10 | ESE 11 | SE 10 | SE 10 | ESE 10 | S 7 | SSW 7 | SSW 8 | S 8 | SSW 8 | ESE 9 | ESE 6 | ESE 7 | ESE 6 | SE 7 | ESE 8 | ESE 8 | ESE 8 | ESE 9 | |
88 | 106 | 141 | 143 | 157 | 148 | 125 | 205 | 475 | 670 | 138 | 50 | 177 | 275 | 302 | 305 | 476 | 672 | 291 | 127 | 169 | |
Wind (km/h) | |||||||||||||||||||||
glassy | on | on | cross | glassy | glassy | cross | cross-on | cross | glassy | off | cross-off | glassy | cross-on | cross-on | cross-on | cross-on | cross-on | cross-off | cross-on | on | |
High Tide | 6:32AM1.85m | 8:35PM1.73m | 7:15AM1.79m | 9:31PM1.64m | 8:04AM1.69m | 10:32PM1.57m | 9:03AM1.55m | 11:37PM1.53m | 10:20AM1.42m | 00:38AM1.52m | 12:01PM1.33m | 1:31AM1.54m | 1:41PM1.33m | ||||||||
Low Tide | 1:03AM0.96m | 1:34PM-0.08m | 1:48AM1.03m | 2:24PM0.03m | 2:41AM1.07m | 3:18PM0.18m | 3:46AM1.10m | 4:18PM0.35m | 5:10AM1.07m | 5:24PM0.51m | 6:42AM0.98m | 6:35PM0.64m | 7:56AM0.83m | ||||||||
 |  | |  |  |  |  |  |  | | | | | | |  | | | |  | | |
 | — | 4:58 | — | — | 4:58 | — | — | 4:58 | — | — | 4:58 | — | — | 4:56 | — | — | 4:56 | — | — | 4:56 | — |
 | 6:57 | — | 6:58 | — | — | 6:59 | — | — | 6:59 | — | — | 7:00 | — | — | 7:00 | — | — | 7:00 | — | — | 7:01 |
— | — | — | 1 | 7 | 3 | — | 11 | 2 | 1 | — | — | 4 | 3 | 2 | 26 | 12 | 4 | — | — | — | |
Temp °C | 20 | 24 | 24 | 21 | 21 | 22 | 22 | 24 | 24 | 22 | 24 | 24 | 19 | 20 | 20 | 20 | 20 | 20 | 20 | 24 | 24 |
21 | 23 | 23 | 23 | 25 | 26 | 26 | 24 | 25 | 25 | 23 | 23 | 19 | 19 | 19 | 19 | 20 | 21 | 22 | 26 | 26 | |
Swell 1 Height (m) Direction Period (s) | ESE 10 | SE 10 | ESE 10 | ESE 11 | SE 10 | SE 10 | ESE 10 | ESE 9 | SE 9 | SSW 8 | S 8 | SSW 8 | ESE 9 | SW 6 | E 11 | — | — | S 8 | ESE 8 | ESE 8 | ESE 9 |
 kJ | 88 | 106 | 141 | 143 | 157 | 148 | 125 | 110 | 88 | 353 | 138 | 50 | 177 | 2 | 83 | — | — | 90 | 291 | 127 | 169 |
Swell 2 Height (m) Direction Period (s) | SE 4 | — | — | SSE 7 | SSE 6 | S 7 | — | — | — | ESE 10 | ESE 10 | ESE 9 | SW 7 | — | — | — | — | — | SSW 8 | SSW 7 | SSE 6 |
| kJ | 4 | — | — | 19 | 24 | 9 | — | — | — | 61 | 52 | 50 | 12 | — | — | — | — | — | 51 | 21 | 14 |
Swell 3 Height (m) Direction Period (s) | SE 11 | — | — | — | S 8 | — | — | — | — | — | SSE 7 | SSE 7 | SSE 7 | — | — | — | — | — | SSE 7 | SSE 7 | SW 7 |
| kJ | 31 | — | — | — | 5 | — | — | — | — | — | 41 | 19 | 9 | — | — | — | — | — | 36 | 15 | 12 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | SSE 5 | S 6 | S 7 | SSW 7 | SSW 8 | NNE 4 | NE 5 | — | ESE 6 | ESE 7 | ESE 6 | SE 7 | ESE 8 | NNE 4 | NNE 4 | NE 4 |
| kJ | — | — | — | — | — | 40 | 94 | 205 | 475 | 670 | 13 | 91 | — | 275 | 302 | 305 | 476 | 672 | 18 | 13 | 9 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 4 | 11 | 2 | 0 | 0 | 2 | 11 | 11 | 0 | 0 | 43 | 0 | 285 | 369 | 688 | 43 | 43 | 0 | 22 | 11 |
Best forecast wave conditions in Shikoku | |||||||||||||||||||||
Best forecast wave conditions in Japan | |||||||||||||||||||||
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 Asakawa 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 Asakawa Surf forecast
The above surf forecast table for Asakawa provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Asakawa can be found by selecting the local surf guide option on the grey menu. Our Asakawa 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 (Asakawa) 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 Asakawa 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.
Are you planning a holiday in Shikoku? If you are looking for accommodation near Asakawa, camping, hotels and holiday cottages in Shikoku, consider staying in Anan which is 41 km (25 miles) away. Other places in and around Shikoku where you can find information about places to rent, and car hire include Muroto which is 44 km (27 miles) away, Komatsushima, Aki and Kamojima.
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