Asakawa Surf Break

Lat Long: 33.63° N 134.38° E

Asakawa Surf Forecast and Surf Report

Issued: 2 am 21 Aug 2026 (local time)

Forecast update in  hr  min

Today's Asakawa sea temperature is
28.2° C
0.5° 

Asakawa surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


Asakawa surf forecast from 21 Aug 2026:

  • Best quality surf: Tuesday 25 Aug, 6AM (local time) - 13ft (4.0m), 16s period, SSE swell with glassy winds.
  • Most powerful swell: Tuesday 25 Aug, 3PM (local time) - 15ft (4.5m), 16s period, SSE swell with 10,010 kJ wave energy.
  • Next surfable swell (1★+): Saturday 22 Aug, 6AM (local time) - 2.5ft (0.8m), 9s period with SSW swell.

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 Saturday (Aug 22) at 6AM. The primary swell is predicted to be 0.8m and 9s period with a secondary swell of 0.4m and 11s. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Asakawa in the next 16 days are 4.5m 16s and forecast to arrive on Tuesday (Aug 25) at 3PM. Winds are predicted to be cross-onshore at the time the swell arrives.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+) 6AM (Sat 22nd Aug)2.5ft (0.8m) 9s
Best Surf 6AM (Tue 25th Aug)13ft (4.0m) 16s
Most Powerful 3PM (Tue 25th Aug)15ft (4.5m) 16s

Table - best surf conditions forecast for Asakawa over the next 16 days.


The Lowdown

Alright, let’s get into it. I’m looking at the next 16 days here, and honestly, the first few days are a bit of a write-off. We’ve got a slow start, but there is some serious firepower coming our way if you’ve got the patience and the skill.

The first decent window is a long way off. We’re looking at a gap of nearly three days with nothing worth paddling out for. The early stuff is small, messy, and not worth your time.

Friday, August 21st through to Sunday, August 23rd is flat or junky. Tiny swell around 1ft to 3ft, short period, and the wind is all over the place. It’s just not on.

Now, Monday, August 24th is where things start to get interesting. The morning session at Asakawa is a standout. We’ve got a solid 5ft swell coming from the SE, with a period of 19 seconds. That’s a very long-period groundswell, so it’s going to have a lot of power and shape. The energy is strong, sitting at 2114. The wind is glassy, which is a massive plus. This is a point break, so that long period will work beautifully – it’s not going to close out. The water is a warm 83°, and that’s about average for the time of year, so no surprises there. This is excellent for experienced surfers, but at 5ft, it’s pushing it for beginners. The crowds are a possibility here, so get there early.

Tuesday, August 25th morning is the absolute top of the menu. This is for experts only. We’re talking 13ft swell from the SSE, with a 16-second period. The combined energy is a massive 8733. The wind is glassy again. This is exceptional, but it’s big. You need to know what you’re doing. The afternoon blows up a bit with a cross-onshore wind, so the morning is the window.

Wednesday, August 26th and Thursday, August 27th are still solid in size, 12ft and 8ft, but the wind turns onshore and choppy, so the quality drops right off. It’s not worth the hassle.

Friday, August 28th morning is a nice little recovery. 8ft from the SSE, glassy wind, and the swell energy is down to 820. It’s a good, clean wave for the intermediate crew.

After that, it tails off again through the end of August and into the start of September. Small, weak, and choppy.

But then, hold on. Thursday, September 3rd is another huge one. The morning shows 8ft from the ESE, but the period is a staggering 20 seconds. The energy is 5979. The afternoon is even bigger at 12ft from the E, with a 19-second period and energy at 9420. This is very long-period groundswell, and it’s going to be a freight train. The morning has a slight cross-onshore, but it’s light. The afternoon is onshore, so the morning is the call. This is a major event, but it’s 13 days out, so treat it as promising but not locked in. It’s an expert-only day.

So, to sum it up: the two absolute standouts are Monday, August 24th morning and Tuesday, August 25th morning. The first is a beautiful, powerful groundswell with glass, the second is a proper big-wave day for the brave. The 3rd of September is a long-range beast that could be epic or a messy mess depending on the wind.

For the rest of it, it’s mostly small or onshore. Not much to get excited about.

- Rusty

Short Range Forecast

Light rain (total 3mm), mostly falling on Fri afternoon. Warm (max 30°C on Sat morning, min 25°C on Fri night). Wind will be generally light.

Days 4-6 Weather Summary

Heavy rain (total 81mm), heaviest during Wed night. Warm (max 29°C on Mon morning, min 25°C on Mon night). Winds increasing (calm on Mon night, fresh winds from the SE by Wed night).

Friday
21
Saturday
22
Sunday
23
Monday
24
Tuesday
25
Wednesday
26
Thursday
27
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
1
0
0
1
0
0
0
0
0
4
2
5
7
7
5
1
1
0
0
0
1
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.9
S
9
0.9
S
10
0.8
SSW
9
0.8
SSW
9
0.7
SSW
9
0.6
SSW
8
0.4
ESE
11
0.4
SW
9
0.6
ESE
12
1.6
SE
19
2.5
SE
16
3.5
SSE
16
4
SSE
16
4.5
SSE
16
4
SSE
14
3.5
SSE
12
3.5
SSE
11
4
SSE
11
3.5
S
11
2.5
SSE
10
2.5
SSE
9
Wave Graph
Metric surfscale
Energy kJ
127
145
108
108
80
55
38
24
102
1844
3631
6144
8699
10010
7164
3030
2686
4169
2626
1394
1012
Wind (km/h)
5
SSE
10
SSW
5
WSW
5
SE
15
S
5
WSW
5
S
10
S
10
SW
5
SE
15
SSE
0
NNW
5
ESE
10
ESE
5
E
20
ESE
20
SE
35
SE
25
SE
25
S
15
SW
Wind State
glassy
cross-on
cross
glassy
cross-on
cross
on
on
cross-on
glassy
on
glassy
glassy
cross-on
cross
cross-on
cross-on
on
on
cross-on
cross-on
High Tide
2:05PM1.21m
10:36PM1.39m
4:20PM1.32m
00:36AM1.34m
4:43PM1.42m
2:31AM1.38m
5:04PM1.52m
3:35AM1.49m
5:25PM1.60m
4:20AM1.60m
5:47PM1.67m
4:59AM1.70m
6:08PM1.73m
Low Tide
4:07PM1.20m
7:28AM0.66m
8:19PM1.26m
8:57AM0.58m
9:51PM1.18m
9:51AM0.47m
10:27PM1.07m
10:31AM0.36m
10:55PM0.96m
11:05AM0.27m
11:22PM0.84m
11:35AM0.21m
11:50PM0.72m
part cloud
thunderstorm
thunderstorm
clear
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:28
5:28
5:28
5:30
5:30
5:31
5:31
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:43
6:40
6:39
6:38
6:37
6:37
6:35
 mm
2
1
1
14
11
11
44
27
23
13
Temp °C
29
28
26
30
29
26
30
30
26
29
29
26
29
29
26
27
27
26
26
26
26
Feels °C
32
32
31
33
32
30
32
34
31
33
32
32
32
33
30
30
30
27
28
28
30
  • 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
How to use the Wavefinder 
submit an eyeball surf report

Quick surf report for Asakawa:

join our community of surf reporters

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.

Nearest locationNearest