Asakawa Surf Break

Lat Long: 33.63° N 134.38° E

Asakawa Surf Forecast and Surf Report

Issued: 2 am 29 Jul 2026 (local time)

Forecast update in  hr  min

Today's Asakawa sea temperature is
28.3° 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 28 Jul 2026:

  • Best quality surf: Wednesday 5 Aug, 6AM (local time) - 18ft (5.5m), 18s period, ESE swell with offshore winds.
  • Most powerful swell: Wednesday 5 Aug, 9AM (local time) - 21ft (6.5m), 19s period, ESE swell with 27,305 kJ wave energy.
  • Next surfable swell (1★+): Wednesday 29 Jul, 9AM (local time) - 1.5ft (0.5m), 10s 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 Wednesday (Jul 29) at 9AM. The primary swell is predicted to be 0.5m and 10s period with a secondary swell of 0.5m and 6s. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Asakawa in the next 16 days are 6.5m 19s and forecast to arrive on Wednesday (Aug 05) 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 0.5m 3s period and expected on Sunday (Aug 02) at 3AM.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+) 9AM (Wed 29th Jul)1.5ft (0.5m) 10s
Best Surf 6AM (Wed 5th Aug)18ft (5.5m) 18s
Most Powerful 9AM (Wed 5th Aug)21ft (6.5m) 19s

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


The Lowdown

Alright folks, Rusty here. Let’s have a look at what’s in store for Asakawa over the next couple of weeks.

Truth be told, we’re in for a bit of a slow start. The first few days are pretty flat and unexciting, so don’t get your hopes up just yet. We’ve got a gap of about four or five days with nothing really worth paddling out for, but once we get past that, things start to get interesting.

The first bit of real action shows up on Sunday, the 2nd of August. We’ve got a little pulse of energy coming through, with swell climbing to 3 ft out of the ESE, and a very long period of 15 seconds. The combined energy is moderate (343). The wind is a bit of a sore point though – it’s onshore, so the conditions won’t be perfect. It’s a marginal call, but at least there’s some life in the water.

Then Monday the 3rd, the swell really starts to build. We’re looking at 6 ft from the ESE with a period of 17 seconds, and the energy jumps right up to strong (1626). The wind is still cross-onshore though, so while the power is there, the surface won’t be glassy. This one’s for the more experienced crew as the size is getting up there.

By Tuesday the 4th, it’s getting solid. Waves are 10 ft from the ESE, period of 18 seconds, and the energy is very strong (5242). But again, the wind is cross-onshore, so it’s a bit of a battle. Still, for the chargers out there, there’s plenty of grunt.

Now here’s the standout – Wednesday the 5th and Thursday the 6th of August. This is a true big-wave event. We’re looking at 21 ft to 26 ft swell from the SE and SSE, with periods of 16 to 19 seconds. The energy numbers are massive – up to 50,920 – and the wind is offshore from the NE. This is as clean as it gets for a setup this size. But let’s be real, this is only for experts. If you’re not comfortable in solid, heavy water, stay on the beach. This is a proper, pull-out-your-biggest-gun kind of swell.

After that, it drops back down quickly. The wind turns onshore and lumpy from Friday the 7th onwards, and the swell fades to a bumpy 8 ft on Saturday, then down to 3 ft by Sunday. The conditions are poor, and the break is a bit too exposed and inconsistent for the messy leftovers.

The tail end of the window, around the 13th of August, shows another pulse. We’ve got 13 ft from the ESE with a period of 12 seconds, and the wind is clean offshore from the NE. This is excellent for experienced surfers. The energy is strong (4554), and the waves should have some real shape. It’s a promising note to end the outlook on, but it’s a long way out, so keep an eye on the forecasts.

Remember, Asakawa is a bit inconsistent and the optimum swell direction is SE. The water temperature is sitting at 83°, which is about a degree warmer than usual for this time of year, so it’s a little on the warm side.

Stay safe out there, and respect the ocean.

Rusty

Short Range Forecast

Light rain (total 2mm), mostly falling on Wed morning. Warm (max 33°C on Thu morning, min 27°C on Fri night). Wind will be generally light.

Days 4-6 Weather Summary

Light rain (total 4mm), mostly falling on Mon morning. Warm (max 33°C on Sat morning, min 27°C on Sun night). Wind will be generally light.

Wednesday
29
Thursday
30
Friday
31
Saturday
1
Sunday
2
Monday
3
Tuesday
4
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
1
1
0
0
0
0
0
0
0
0
1
0
1
3
3
3
4
4
4
9
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.5
SE
10
0.5
SE
10
0.5
SE
10
0.4
SE
10
0.4
SE
10
0.4
SE
10
0.4
SE
9
0.4
SE
9
0.4
SE
10
0.4
SE
10
0.4
SE
11
0.4
SE
16
0.5
ESE
15
0.9
ESE
15
1.2
ESE
16
1.7
ESE
17
2.1
ESE
18
2.3
ESE
17
3
ESE
18
3.5
ESE
18
4.5
ESE
18
Wave Graph
Metric surfscale
Energy kJ
48
48
47
23
23
23
24
23
23
28
29
66
125
314
706
1608
2640
3099
5242
6657
12823
Wind (km/h)
5
SW
5
SE
5
NW
5
ESE
5
SE
5
NW
0
E
5
SE
5
NW
5
NE
5
ESE
5
NNW
5
E
10
SSE
0
WSW
10
SE
10
SSE
5
SE
5
SE
10
SE
0
WNW
Wind State
glassy
glassy
off
glassy
on
glassy
glassy
cross-on
glassy
glassy
cross-on
off
cross
on
glassy
cross-on
on
glassy
cross-on
on
glassy
High Tide
6:46PM1.68m
5:48AM1.74m
7:11PM1.71m
6:24AM1.77m
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
Low Tide
12:00PM0.17m
00:13AM0.89m
12:32PM0.15m
00:44AM0.81m
1:02PM0.16m
1:15AM0.74m
1:31PM0.21m
1:47AM0.67m
2:00PM0.31m
2:22AM0.61m
2:31PM0.44m
3:01AM0.57m
3:03PM0.60m
thunderstorm
thunderstorm
part cloud
clear
clear
clear
clear
clear
clear
clear
part cloud
part cloud
clear
clear
clear
thunderstorm
thunderstorm
rain showers
thunderstorm
thunderstorm
thunderstorm
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:11
5:11
5:13
5:13
5:13
5:15
5:16
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:05
7:04
7:04
7:02
7:01
7:00
7:00
 mm
1
1
1
1
2
2
1
1
Temp °C
31
32
29
33
33
29
33
33
29
33
33
29
32
32
28
30
30
27
29
28
27
Feels °C
36
36
33
36
37
33
36
37
33
36
37
33
35
36
34
35
34
33
34
32
33
  • Map Icons:
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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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