Asakawa Surf Break

Lat Long: 33.63° N 134.38° E

Asakawa Surf Forecast and Surf Report

Issued: 2 am 23 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 22 Aug 2026:

  • Best quality surf: Tuesday 25 Aug, 6AM (local time) - 11ft (3.5m), 16s period, SSE swell with glassy winds.
  • Most powerful swell: Tuesday 25 Aug, 12PM (local time) - 11ft (3.5m), 16s period, SSE swell with 6,132 kJ wave energy.
  • Next surfable swell (1★+): Sunday 23 Aug, 9AM (local time) - 2ft (0.6m), 8s 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 Sunday (Aug 23) at 9AM. The primary swell is predicted to be 0.6m and 8s 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 3.5m 16s and forecast to arrive on Tuesday (Aug 25) at 12PM. 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+) 9AM (Sun 23rd Aug)2ft (0.6m) 8s
Best Surf 6AM (Tue 25th Aug)11ft (3.5m) 16s
Most Powerful12PM (Tue 25th Aug)11ft (3.5m) 16s

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


The Lowdown

Alright, this is Rusty, and I’ve got the local scoop for Asakawa over the next sixteen days. Let’s get into it.

Things will start off very quiet and ordinary, but we’ve got a real window of power coming up that’s worth keeping an eye on. The first few days are for the patient, but if you can wait until the middle of next week, there’s some serious groundswell lining up.

Sunday the 23rd is a washout. Tiny 2ft swell from the SSW with weak energy (95), and it’s glassy in the morning but the period is a short 8 seconds. Not worth a paddle. Monday the 24th is where it starts to get interesting. A jump to 4ft from the SE with a very long 18-second period, and the energy is already pumping at 1210. The morning is glassy and clean, so that’s your first real look. The water is sitting at 83°, which is about normal for this time of year.

Tuesday the 25th brings a solid pulse. Swell hits 12ft from the SSE, period dropping to 15 seconds, and the energy is huge at 5909. That’s a lot of water moving. But the wind is cross-on, and the report calls it marginal. This is serious size – over 8ft, so it’s for experienced surfers only. The point should handle the long period well, but the wind is a bit messy. Wednesday the 26th holds similar size at 10ft, with some clouds and a risk of thunderstorms. Still onshore wind, so it’s not going to be pristine.

The standout in this whole run is likely Thursday the 27th afternoon. The swell drops to 5ft from the SSE, but the period is still a solid 9 seconds, and the wind goes glassy with light rain. That’s going to be clean and fun. The morning of the 27th is still a bit lumpy, but by the afternoon, it’s the best combo of size and conditions in the first week. Friday the 28th also has glassy mornings and afternoons with 4ft to 5ft from the S, so that’s a good end to the week.

After the 29th, it gets messy again with a drop in size and some onshore winds through the end of August and into September. The next real highlight comes on Wednesday the 2nd of September. The morning shows 7ft from the S with a 14-second period, and the wind is cross-off from the NE. That’s clean, with excellent conditions for experienced surfers. Energy is at 1951 – strong and punchy. That’s a day to mark on the calendar.

The weekend of the 5th and 6th looks blown out with strong winds and lumpy surf, but then Sunday the 6th afternoon turns glassy again with 6ft from the ESE and a 10-second period. Energy jumps to 1006, so that’s another solid, clean session. The 7th of September has clean offshore winds in the morning and afternoon as well, with 6ft and 5ft.

Asakawa is a point break that’s inconsistent, so don’t expect waves every day. This run has a big gap of poor to marginal surf from the 29th right through to the 1st of September. But when it fires, it’s worth the wait. The crowd factor is “sometimes” here, so you might have company on the good days, but it’s not a circus.

The best on offer is Monday the 24th morning for the long period glassy start, and Wednesday the 2nd of September morning for the clean, powerful S swell. Those are the two you want to aim for.

Rusty.

Short Range Forecast

Mostly dry. Warm (max 31°C on Sun morning, min 25°C on Mon night). Wind will be generally light.

Days 4-6 Weather Summary

Moderate rain (total 17mm), heaviest on Thu morning. Warm (max 30°C on Wed morning, min 25°C on Fri night). Wind will be generally light.

Sunday
23
Monday
24
Tuesday
25
Wednesday
26
Thursday
27
Friday
28
Saturday
29
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
3
2
5
4
3
4
4
3
4
2
2
1
2
2
2
1
1
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.6
SSW
8
0.4
SE
13
0.7
SE
12
1.3
SE
18
2.1
SE
16
2.5
SE
16
3.5
SSE
15
3.5
SSE
15
3
SSE
14
3
S
14
2.5
S
13
2
S
12
1.9
S
11
1.6
SSE
9
1.4
SSE
8
1.1
S
9
1.5
S
9
1.4
S
9
1.3
S
9
1.3
S
9
1.2
SSE
8
Wave Graph
Metric surfscale
Energy kJ
54
45
152
1176
2133
3369
5875
5403
3496
3970
2219
1155
813
397
268
185
372
311
263
281
190
Wind (km/h)
5
SE
10
S
5
WSW
5
SSE
10
S
5
SW
5
ESE
10
SSE
5
WNW
5
SSE
10
SSE
0
NW
5
S
5
WSW
5
WSW
5
SW
5
S
5
NNW
5
ENE
5
S
5
SE
Wind State
glassy
cross-on
cross
glassy
on
glassy
cross-on
on
glassy
on
on
glassy
on
glassy
cross
glassy
glassy
glassy
cross
on
on
High Tide
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
5:36AM1.78m
6:30PM1.78m
6:12AM1.83m
6:52PM1.81m
Low Tide
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
12:05PM0.20m
00:18AM0.60m
12:33PM0.23m
00:48AM0.49m
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
part cloud
thunderstorm
rain showers
thunderstorm
light rain
part cloud
part cloud
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:28
5:30
5:30
5:31
5:31
5:31
5:33
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:39
6:38
6:37
6:37
6:35
6:34
6:32
 mm
3
2
4
1
4
3
1
5
12
Temp °C
31
30
27
31
30
26
30
30
26
30
29
27
27
26
26
30
29
27
29
28
26
Feels °C
34
33
32
35
34
31
33
33
31
34
33
32
32
31
31
34
34
32
33
32
31
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  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
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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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