Asakawa Surf Break

Lat Long: 33.63° N 134.38° E

Asakawa Surf Forecast and Surf Report

Issued: 2 am 03 Aug 2026 (local time)

Forecast update in  hr  min

Today's Asakawa sea temperature is
29.0° C
1.5° 

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


Asakawa surf forecast from 2 Aug 2026:

  • Best quality surf: Wednesday 5 Aug, 6PM (local time) - 20ft (6.0m), 17s period, ESE swell with cross-shore winds.
  • Most powerful swell: Friday 7 Aug, 6AM (local time) - 23ft (7.0m), 16s period, SSE swell with 24,447 kJ wave energy.
  • Next surfable swell (1★+): Tuesday 4 Aug, 9PM (local time) - 13ft (4.0m), 17s period with ESE 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 04) at 9PM. The primary swell is predicted to be 4.0m and 17s period with a secondary swell of 3.5m and 16s. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Asakawa in the next 16 days are 7.0m 16s and forecast to arrive on Friday (Aug 07) at 6AM. Winds are predicted to be cross-offshore at the time the swell arrives.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+) 9PM (Tue 4th Aug)13ft (4.0m) 17s
Best Surf 6PM (Wed 5th Aug)20ft (6.0m) 17s
Most Powerful 6AM (Fri 7th Aug)23ft (7.0m) 16s

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


The Lowdown

Alright folks, Rusty here, and I've got a good look at the next couple of weeks for us. We're talking about Asakawa, a point break that's pretty inconsistent and can be a bit of a tease. The water's sitting at a warm 84°, which is a touch warmer than normal for this time of year, so you can leave the steamer at home.

The immediate forecast is a bit of a slow grind. Monday the 3rd kicks off with small, weak 5ft swell from the ESE, and a light cross-on breeze. The energy is pitifully low (1263), so honestly, don't even bother. The surf is marginal and the conditions are just not there.

We finally get a pulse of energy beginning on Tuesday the 4th. The swell picks up to 10ft from the ESE, but it's still carrying that cross-on wind. The combined energy climbs to a moderate 6692, but it's still a bit messy. The afternoon looks better with an 12ft swell from the ESE and a period of 17 seconds, giving it some real grunt. The combined energy (14172) is a good sign of the power coming in.

Now, for the standout. You want to circle Wednesday the 5th and Thursday the 6th. Wednesday morning is a beauty. The swell is a solid 15ft from the SE, with a very long 17-second period driving it. The energy is massive (12450), and we have a clean, cross-shore breeze from the ENE. That's a recipe for some serious, well-shaped lines at this point break. The afternoon bumps up to 16ft, still with that same long period and clean cross-shore wind. This is the best on offer, but it's a heavy wave. At 15ft to 16ft, this is expert territory only. The size, the power, and the period are no joke.

Thursday the 6th is even bigger, with 21ft swells from the ESE. The energy is off the charts (22487). The wind is cross-shore, but the forecast explicitly says the swell is too big for this break. Plus, it's a point break, so a long period groundswell of 17 seconds can make the waves break a bit too fast and closed out. This is for the absolute elite, or maybe just for watching from the cliff.

The swell starts to back off toward the end of the week, but it stays big. Friday the 7th and Saturday the 8th see 15ft to 13ft swells, but the wind turns more onshore and the conditions get messy, with a lot of cross-chop. The energy is still high, but the quality drops.

After the 8th, we enter a lull. There's a big gap of a few days with very little surf. Sunday the 9th and Monday the 10th are small, weak, and onshore.

Then, a few interesting windows pop up later. Tuesday the 11th of August offers a 8ft easterly swell with glassy conditions in the morning. The energy is moderate (2926), and with a period of 11 seconds, it should be a fun, manageable size for experienced surfers. The glassy wind is a major plus for clean waves.

Finally, Wednesday the 12th has a very small 3ft SSW swell with glassy conditions, but the energy is a weak 676. It's a session for a longboard or a foiler.

The real highlight is the Wednesday the 5th to Thursday the 6th window. Massive, powerful, long-period groundswell with clean cross-shore winds. It's a world-class swell, but it's for experts only. For the rest of us, the early morning of Tuesday the 11th looks like a nice, clean, and much more manageable option.

Rusty.

Short Range Forecast

Light rain (total 4mm), mostly falling on Mon morning. Warm (max 31°C on Mon morning, min 25°C on Tue night). Wind will be generally light.

Days 4-6 Weather Summary

Heavy rain (total 155mm), heaviest during Sat afternoon. Warm (max 31°C on Thu morning, min 25°C on Sat morning). Wind will be generally light.

Monday
3
Tuesday
4
Wednesday
5
Thursday
6
Friday
7
Saturday
8
Sunday
9
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
2
2
3
5
7
8
8
8
9
!
!
!
!
7
6
5
0
3
3
0
2
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.5
ESE
16
1.7
ESE
16
2.1
ESE
17
3
ESE
16
3.5
ESE
17
4
ESE
17
4.5
SE
17
5
SE
17
6
SE
16
6.5
SE
17
6.5
SE
16
6.5
SSE
16
6
SSE
16
4.5
S
15
4
S
15
4
S
15
3.5
SSW
15
3
SSW
16
3
SSW
16
2.4
SSW
15
1.7
SSW
14
Wave Graph
Metric surfscale
Energy kJ
1223
1393
2437
4324
8086
9386
12450
15148
17958
22487
21353
20673
17850
7958
7387
7301
5386
4918
3913
2508
1080
Wind (km/h)
10
ESE
10
SE
10
ESE
10
SE
15
SSE
5
ESE
15
ENE
10
E
15
NE
20
ENE
30
E
20
NE
25
ENE
20
E
15
ENE
15
ENE
20
ESE
20
E
25
E
20
ESE
20
E
Wind State
cross-on
on
cross-on
cross-on
on
glassy
cross
cross
cross-off
cross
cross
cross-off
cross
cross
cross
cross
cross-on
cross
cross
cross-on
cross
High Tide
8:51PM1.72m
9:03AM1.58m
9:19PM1.69m
9:59AM1.47m
9:52PM1.64m
11:18AM1.36m
10:35PM1.58m
1:18PM1.32m
11:38PM1.53m
3:21PM1.41m
1:11AM1.52m
4:29PM1.55m
2:42AM1.58m
Low Tide
2:31PM0.44m
3:01AM0.57m
3:03PM0.60m
3:47AM0.54m
3:40PM0.78m
4:44AM0.52m
4:27PM0.97m
6:00AM0.50m
5:43PM1.14m
7:33AM0.43m
7:55PM1.22m
8:57AM0.31m
9:34PM1.16m
thunderstorm
thunderstorm
thunderstorm
part cloud
rain showers
part cloud
clear
clear
clear
clear
thunderstorm
rain showers
mod rain
thunderstorm
thunderstorm
mod rain
thunderstorm
thunderstorm
rain showers
light rain
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:15
5:16
5:16
5:16
5:18
5:18
5:18
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:00
7:00
6:59
6:59
6:58
6:57
6:55
 mm
1
1
1
1
2
7
6
4
6
9
93
28
3
1
Temp °C
31
29
27
29
28
26
30
31
27
31
31
27
27
28
27
26
25
26
27
28
26
Feels °C
35
34
31
33
30
31
32
33
30
31
31
29
28
30
30
29
27
28
27
29
28
  • 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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