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Surf Forecasts:

Asakawa surfForecast / Shikoku / Japan

information circle12 Day Weather and Surf, issued 8 am Tuesday 16 Sep 2025 JST
Forecast 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
28.2° C
 (Which is 1.4°C warmer than normal for this time of year)

Best Forecast Surf Conditions for Asakawa this week:

The surf forecast for Asakawa over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Wednesday (Sep 17) at 12AM. The primary swell is predicted to be 0.6m and 9s period with a secondary swell of 0.1m and 15s. Another secondary swell of 0.2m and 4s is also forecast. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Asakawa in the next 12 days are 2.2m 13s and forecast to arrive on Tuesday (Sep 23) at 9AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.3m 5s period and expected on Monday (Sep 22) at 9AM.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+)12AM (Wed 17th Sep)2ft (0.6m) 9s
Best Surf 9AM (Tue 23rd Sep)7ft (2.2m) 13s
Most Powerful 9AM (Tue 23rd Sep)7ft (2.2m) 13s

Table - best surf conditions forecast for Asakawa over the next 12 days.

Updates in  hr  min  s Forecast update imminent 
12 DaysHourly
Print Table

Short Range Forecast Heavy rain (total 23mm), heaviest during Thu afternoon. Warm (max 31°C on Wed morning, min 22°C on Thu night). Wind will be generally light.

Days 3-6 Weather Summary Moderate rain (total 13mm), heaviest on Sat night. Warm (max 27°C on Sun morning, min 21°C on Sun night). Wind will be generally light.

Tuesday
16
Wednesday
17
Thursday
18
Friday
19
Saturday
20
Sunday
21
Monday
22
AMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNight
Rating
(10 max)
0
0
1
0
0
1
0
0
0
0
0
1
1
1
1
1
2
3
2
2
3
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
0.5
SE
0.5
SE
0.6
ESE
0.5
SE
0.3
SE
0.4
ESE
0.4
SE
0.5
SE
0.5
SE
0.5
SE
0.5
SE
0.6
E
0.8
ESE
0.8
ESE
0.4
ESE
0.7
SSE
1.2
SSE
1.6
SSE
1.5
SSE
1.5
SSE
1.7
SSE
Period(s) (?)91099119101010999999111412111111
Wave
Graph
(?)Metric surfscale
Energy (?)46536743557465996145438698113781846227548028201024
Wind
(km/h)
5
ENE
10
S
10
W
5
SSW
10
SSW
5
W
5
ENE
5
SSE
10
N
10
NNE
5
SE
0
W
5
E
5
SSW
5
NW
10
NNE
15
NE
15
N
25
NNE
20
NNE
15
N
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
glassoncross-
off		glasscross-
on		cross-
off		glassoncross-
off		cross-
off		glassglassglassglassoffcross-
off		cross-
off		cross-
off		cross-
off		cross-
off		cross-
off
High Tide
/ height (m)
3:38PM
1.45
1:11AM
1.37
4:16PM
1.55
2:54AM
1.46
4:44PM
1.63
3:54AM
1.58
5:08PM
1.70
4:40AM
1.69
5:30PM
1.74
5:19AM
1.77
5:51PM
1.77
5:54AM
1.81
6:11PM
1.79
Low Tide
/ height (m)
8:52PM
1.23
8:51AM
0.44
9:51PM
1.07
9:49AM
0.36
10:26PM
0.91
10:31AM
0.31
10:56PM
0.75
11:06AM
0.30
11:24PM
0.60
11:36AM
0.32
11:51PM
0.48
12:04PM
0.38
12:18AM
0.38
Tuesday
16
Wednesday
17
Thursday
18
Friday
19
Saturday
20
Sunday
21
Monday
22
Sunrise5:45--5:46--5:47--5:47--5:48--5:48--5:48--
Sunset-6:07--6:07--6:06--6:04--6:02--6:01--6:00-
clear
thunderstorm
clear
clear
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
rain showers
part cloud
part cloud
thunderstorm
thunderstorm
thunderstorm
rain showers
thunderstorm
part cloud
part cloud
cloud
light rain
Rain (mm)
-2--412863--12412---2
Temp. °C303027313027292825262624252525272724252521
Feels °C (?)353532353532343328293029293030292925232419
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
Map placeholder

Eyeball surf reportRecent Eyeball Surf Reports for Shikoku

  1. weather stationWind Update The wind is still cross-off at Asakawa (light winds from the NE at Murotomisaki(47899-0) 46 km from Asakawa). 0.4m 9s swell from the SE with a 0.2m 4s local chop from the S and a 0.1m 13s groundswell from the ESE. 3 swells combining to make bigger set waves.

    1 hour 34 minutes ago Asakawa
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<
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46 km away, 1 h 34 min ago

19 km/h
NE
0.0
28.2
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 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.

View detailed surf forecast for Asakawa at:
surf-forecast.com

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 12 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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