Asakawa Surf Break

Lat Long: 33.63° N 134.38° E

Asakawa Surf Forecast and Surf Report

Issued: 2 pm 24 Aug 2026 (local time)

Forecast update in  hr  min

Today's Asakawa sea temperature is
28.7°C
1.0° 

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


Asakawa surf forecast from 24 Aug 2026:

  • Best quality surf: Tuesday 25 Aug, 6AM (local time) - 8ft (2.5m), 14s period, SSE swell with glassy winds.
  • Most powerful swell: Tuesday 25 Aug, 9AM (local time) - 10ft (3.0m), 14s period, SSE swell with 3,875 kJ wave energy.
  • Next surfable swell (1★+): Tuesday 25 Aug, 6AM (local time) - 8ft (2.5m), 14s period with SSE 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 Tuesday (Aug 25) at 6AM. The primary swell is predicted to be 2.5m and 14s period with a secondary swell of 1.8m and 17s. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Asakawa in the next 16 days are 3.0m 14s and forecast to arrive on Tuesday (Aug 25) at 9AM. 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 (Tue 25th Aug)8ft (2.5m) 14s
Best Surf 6AM (Tue 25th Aug)8ft (2.5m) 14s
Most Powerful 9AM (Tue 25th Aug)10ft (3.0m) 14s

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


The Lowdown

Alright folks, Rusty here. We’ve got a look at Asakawa, and it’s a bit of a mixed bag over the next 16 days. The week starts with a real tease, but then conditions get messy. There’s a promising window later on, but you’ll need to be patient and a bit experienced to make the most of it.

The first real action is Monday morning, August 24th. The water is sitting at about 84°F, which is pretty much normal for this time of year. We’ve got a clean 4 ft swell from the SE, with a super long period of 19 seconds. That’s a proper groundswell rolling in, with plenty of energy behind it (1288). The wind is glassy, and Asakawa is a point break that loves this kind of incoming direction. This is your standout session for the early period. However, that long period makes it a bit tricky for the sandbanks; it will be better formed and more consistent here at the point. Keep in mind the spot is inconsistent, so when it’s on, it’s worth the wait, but it can be a bit of a gamble. Crowds are possible here.

After that glassy Monday, the wind turns onshore from the S and the swell jumps up to 7 ft - 10 ft with a shorter period. The energy is still strong (2415 to 3584), but the wind is spoiling it. The swell is big enough that it’s only for the more experienced crew, and the onshore wind will make it choppy and hard to manage. This messy pattern holds right through the end of the month into the first days of September. The swell drops off, but the wind stays mostly cross-onshore and the surf quality is poor. For about a week, from Wednesday the 27th of August through to Tuesday the 2nd of September, the outlook is pretty ordinary. You’ll see small, weak swell (energy dropping to as low as 61) and mostly grotty conditions.

Now, here’s the real hope. Thursday morning, September 3rd, things flip. A clean 5 ft swell from the S arrives with a nice 14-second period, and the wind turns cross-offshore from the NNE. This is clean, lined-up surf. The energy is solid at 1389. This is great for experienced surfers, but the 5 ft height is still manageable for a strong intermediate. The real standout of the whole forecast though is Friday morning, September 4th. The swell builds to 8 ft from the S with a 13-second period, and the wind stays clean cross-offshore from the NE. The energy is pumping at 2182. This is a big swell, definitely for experts only, but the conditions are excellent. The wind is light and clean, the water will be smooth. This is the session to circle on your calendar if you’ve got the skills.

The surf starts to fade out again that Friday afternoon, with the wind swinging onshore and the swell dropping through the rest of the weekend. By Monday the 7th and Tuesday the 8th of September, we’re back to small, weak conditions. The long-range call for the 3rd and 4th of September is promising, but always a bit less certain this far out.

Rusty.

Short Range Forecast

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

Days 5-7 Weather Summary

Moderate rain (total 19mm), heaviest on Thu afternoon. Warm (max 31°C on Thu afternoon, min 26°C on Thu night). Wind will be generally light.

Mon
24
Tuesday
25
Wednesday
26
Thursday
27
Friday
28
Saturday
29
Sunday
30
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
2
4
3
2
3
3
2
2
1
0
1
0
0
1
1
0
1
1
0
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
2.1
SE
16
2.4
SE
16
3
SSE
14
2.5
SSE
13
2.5
S
14
2.2
S
13
1.9
SSW
12
1.7
SSW
12
1.3
SSW
12
1
SSW
11
1.4
S
8
1.1
S
8
0.8
SSW
9
1.2
SSW
8
1
S
8
0.9
SSW
8
0.8
S
8
0.8
SSW
9
0.8
SSW
8
0.4
SE
10
Wave Graph
Metric surfscale
Energy kJ
2357
2844
3875
2005
2694
1592
1155
866
483
218
279
157
101
188
130
115
86
108
90
39
Wind (km/h)
15
S
5
WSW
5
S
10
S
10
WSW
10
S
15
SSW
10
SW
10
SW
15
S
10
WSW
5
SW
10
SSW
10
WSW
5
SSW
10
SSW
5
W
5
SSE
15
SSW
10
WSW
Wind State
on
cross
cross-on
on
cross
cross-on
cross-on
cross
cross-on
cross-on
cross
cross-on
cross-on
cross
glassy
cross-on
cross-off
glassy
cross-on
cross
High Tide
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
6:48AM1.84m
7:14PM1.82m
Low Tide
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
1:02PM0.31m
1:19AM0.40m
clear
clear
clear
clear
clear
clear
part cloud
part cloud
cloud
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
part cloud
thunderstorm
thunderstorm
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:30
5:31
5:31
5:31
5:33
5:33
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:38
6:37
6:37
6:35
6:34
6:32
6:30
 mm
2
4
4
3
1
3
2
Temp °C
30
26
31
30
26
31
29
27
31
31
27
30
29
27
31
30
27
31
31
26
Feels °C
33
31
34
33
30
34
33
31
34
34
32
34
33
32
35
34
32
35
33
30
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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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