Asakawa Surf Break

Lat Long: 33.63° N 134.38° E

Asakawa Surf Forecast and Surf Report

Issued: 2 pm 31 Jul 2026 (local time)

Forecast update in  hr  min

Today's Asakawa sea temperature is
28.7° C
1.2° 

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


Asakawa surf forecast from 31 Jul 2026:

  • Best quality surf: Wednesday 5 Aug, 9PM (local time) - 20ft (6.0m), 18s period, SE swell with cross-shore winds.
  • Most powerful swell: Thursday 6 Aug, 6AM (local time) - 25ft (7.5m), 18s period, SE swell with 33,861 kJ wave energy.
  • Next surfable swell (1★+): Saturday 1 Aug, 9PM (local time) - 1.5ft (0.4m), 11s period with SE 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 01) at 9PM. The primary swell is predicted to be 0.2m and 18s period with a secondary swell of 0.4m and 11s. 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 7.5m 18s and forecast to arrive on Thursday (Aug 06) at 6AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 4s period and expected on Sunday (Aug 02) at 12PM.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+) 9PM (Sat 1st Aug)1.5ft (0.4m) 11s
Best Surf 9PM (Wed 5th Aug)20ft (6.0m) 18s
Most Powerful 6AM (Thu 6th Aug)25ft (7.5m) 18s

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


The Lowdown

Alright, folks, Rusty here. Let's talk about the next couple of weeks at Asakawa.

The first few days are a bit of a tease, with some tiny waves but not much to write home about. We’ve got a slow start, but the end of the first week and into the second is where things get interesting. There’s a big gap of no real surf from the 31st through the 1st, with just tiny, poor conditions. Saturday the 2nd of August is the first time we see a pulse of proper swell, and it turns into a proper run.

The Standout: Wednesday, the 6th of August, is the big one, but it's for experts only. The early morning session on the 6th will see a massive 25ft swell from the SE, with a very long period of 18 seconds. The combined energy is an astronomical 33,184 (very strong). That’s a serious amount of water moving. The wind is a moderate cross-shore, which isn't perfect, but the sheer size and power will be something else. This is not a day for the faint of heart. The afternoon on the 6th stays huge at 23ft from the SSE, but the wind turns cross-onshore, making it a bit of a battle. Thursday the 5th of August is also huge, with 18ft swell from the SE and a good 18-second period, and light cross-shore wind. The combined energy is 17,158 (very strong). That’s another big day, but the wind is a little better than the 6th.

Before that, the 2nd of August is a nice warm-up. Sunday morning, the 2nd, we see a 2ft swell from the ESE with a long 18-second period, and a light cross-offshore wind. The combined energy is moderate (335). It’s clean, and the water is a touch warmer than normal at 84° for the time of year. The afternoon builds to 4ft from the ESE, still with that 16-second period and clean cross-offshore wind. The energy jumps to 579 (moderate). It’s a good, clean start to the run.

Don't Sleep on the Second Week: After the big stuff passes, the 10th of August (Monday) looks like a gem. The morning brings a 4ft, 13-second swell from the E with an offshore wind and combined energy of 865 (moderate). The forecast says "expect very good surf conditions," and that's a window of clean, fun waves. Then on the 11th of August (Tuesday), we have a glassy morning with a 4ft, 13-second swell from the ESE and energy of 906 (moderate). The afternoon is dead flat calm, glassy, with a 4ft swell from the same direction. That’s a solid day for a point break setup.

The 12th and 13th of August drop off in size, with 2ft to 3ft swells, but the winds are still clean or glassy. Good for a longboard on a quiet day, but nothing to get excited about.

Crowds & Caveats: Asakawa is a point break and is inconsistent. It doesn't break all the time, so when it does, it can get crowded. The crowds are listed as "sometimes," so you can expect company on the good days, especially the 5th and 6th of August. The very long period swells (18 seconds) will be great for this point, meaning nice, lined-up waves, but with those big swells, the paddle out will be a mission between sets.

The Letdown: From the 8th of August, things get messy. The 8th and 9th see a lot of onshore wind and risk of thunderstorms, with the swell dropping fast. It’s not worth paddling out for.

So, to sum it up: the 2nd of August is a clean start, the 5th and 6th of August are proper, expert-level big-wave days, and the 10th and 11th of August offer a second, more manageable window of clean, glassy conditions. The rest of the run is small or blown out.

Rusty.

Short Range Forecast

Some drizzle, heaviest during Mon morning. Warm (max 34°C on Sun morning, min 27°C on Fri night). Wind will be generally light.

Days 5-7 Weather Summary

Light rain (total 5mm), mostly falling on Mon afternoon. Warm (max 31°C on Wed morning, min 25°C on Tue night). Wind will be generally light.

Fri
31
Saturday
1
Sunday
2
Monday
3
Tuesday
4
Wednesday
5
Thursday
6
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
0
0
0
0
1
2
2
2
2
3
3
4
5
8
8
8
!
!
!
7
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.3
SE
13
0.4
SE
10
0.4
SE
10
0.4
SE
11
0.4
SE
16
0.5
ESE
18
1.1
ESE
16
1.2
ESE
15
1.4
ESE
16
2.3
ESE
16
2.3
ESE
18
3
ESE
18
3.5
ESE
18
4.5
ESE
17
5
SE
17
5.5
SE
18
6.5
SE
18
7.5
SE
18
7
SSE
17
6
SSE
16
Wave Graph
Metric surfscale
Energy kJ
26
23
28
29
64
174
568
621
1068
2719
3135
5788
7774
10622
13683
17158
27247
33184
27744
18963
Wind (km/h)
5
SSE
5
WNW
5
E
10
SSE
5
NNW
5
NNE
10
NNE
10
NNE
10
ENE
15
ESE
5
E
5
ESE
10
SE
0
ENE
10
E
10
ESE
10
NE
20
ENE
25
E
20
E
Wind State
on
glassy
glassy
on
off
cross-off
cross-off
cross-off
cross
cross-on
cross-on
cross-on
on
glassy
cross
cross-on
cross-off
cross
cross-on
cross
High Tide
7:36PM1.73m
7:00AM1.77m
8:00PM1.74m
7:37AM1.73m
8:25PM1.74m
8:17AM1.67m
8:51PM1.72m
9:03AM1.58m
9:19PM1.69m
9:59AM1.47m
9:52PM1.64m
11:18AM1.36m
10:35PM1.58m
Low Tide
1:15AM0.74m
1:31PM0.21m
1:47AM0.67m
2:00PM0.31m
2:22AM0.61m
2:31PM0.44m
3:01AM0.57m
3:03PM0.60m
3:47AM0.54m
3:40PM0.78m
4:44AM0.52m
4:27PM0.97m
clear
clear
clear
clear
clear
clear
clear
clear
rain showers
thunderstorm
thunderstorm
part cloud
clear
part cloud
clear
clear
clear
part cloud
thunderstorm
thunderstorm
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:13
5:13
5:15
5:16
5:16
5:16
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:04
7:02
7:01
7:00
7:00
6:59
6:59
 mm
1
3
2
1
10
Temp °C
31
28
33
33
29
34
34
31
30
28
27
30
28
26
31
31
28
31
30
27
Feels °C
35
32
36
37
33
37
38
36
33
32
32
33
31
30
34
35
32
32
31
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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