Asakawa Surf Break

Lat Long: 33.63° N 134.38° E

Asakawa Surf Forecast and Surf Report

Issued: 8 am 07 Aug 2026 (local time)

Forecast update in  hr  min

Today's Asakawa sea temperature is
28.9° 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 7 Aug 2026:

  • Best quality surf: Saturday 8 Aug, 9PM (local time) - 4.5ft (1.4m), 11s period, SSW swell with glassy winds.
  • Most powerful swell: Friday 7 Aug, 6PM (local time) - 11ft (3.5m), 12s period, SSE swell with 3,707 kJ wave energy.
  • Next surfable swell (1★+): Saturday 8 Aug, 9PM (local time) - 4.5ft (1.4m), 11s 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 Saturday (Aug 08) at 9PM. The primary swell is predicted to be 1.4m and 11s period with a secondary swell of 1.3m and 8s. 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 12s and forecast to arrive on Friday (Aug 07) at 6PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 4s period and expected on Tuesday (Aug 11) at 12PM.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+) 9PM (Sat 8th Aug)4.5ft (1.4m) 11s
Best Surf 9PM (Sat 8th Aug)4.5ft (1.4m) 11s
Most Powerful 6PM (Fri 7th Aug)11ft (3.5m) 12s

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 shaping up for Asakawa over the next couple of weeks.

Honestly, this outlook is a bit of a heartbreaker for anyone looking to get a proper wave. The good news is, there’s some serious swell on the way, but the bad news is, the wind just won’t play nice for most of it. The biggest pulse of energy hits early on, with a solid 13ft SE groundswell coming through on Friday morning, packing a ton of energy (9885). That’s a proper slug of swell, but with a 12-second period and a cross-onshore Easterly breeze at 12 mph, it’s going to be a choppy, bumpy mess at Asakawa. The water is sitting at 84°, which is a touch warmer than normal for this time of year, so at least you won’t be cold while you’re getting frustrated.

Friday the 7th of August sees that big swell drop slightly to 12ft in the afternoon, but the wind stays cross-onshore, so it’s still a fight. The next couple of days, Saturday the 8th and Sunday the 9th, see the swell drop fast, but the wind stays on it or cross-onshore, keeping everything messy. There’s a window of glassy conditions on Monday morning the 10th, but the swell has dropped to a tiny 4ft S swell with a modest 10-second period and very weak energy (574). It’s surfable, but you’ll be scratching for something to ride.

The standout, if you can call it that, is likely Tuesday the 11th. The morning offers a clean, cross-offshore breeze from the NNE at 6 mph on a 4ft SSW swell, and the afternoon goes completely glassy with a 3ft S swell. The energy is dropping fast (368), but those conditions will be the cleanest of the entire forecast. For a point break like Asakawa, that’s your best bet for a smooth, longboard-style session.

After that, it’s a long, slow fade. From Wednesday the 12th onwards, the swell drops below 3ft and the winds get messy again. There’s a few glassy mornings on the 15th, 17th, and 18th, but the swell is barely a ripple. The 19th and 20th offer a cleaner cross-offshore breeze again, but again, the swell is tiny and weak. Honestly, after that Tuesday, you’re looking at a solid week of marginal conditions. Kite surfers might get a look in on the bigger, windier days, but for paddle surfing, it’s a waiting game.

So, if you’re chasing the biggest swell, Friday the 7th is the day to get out there, but take a bigger board and be ready for a bumpy ride. For the best quality waves, aim for Tuesday the 11th. Everything else is a gamble.

Rusty.

Short Range Forecast

Heavy rain (total 26mm), heaviest during Fri night. Warm (max 29°C on Sat afternoon, min 25°C on Sat night). Wind will be generally light.

Days 4-6 Weather Summary

Moderate rain (total 13mm), heaviest on Wed night. Warm (max 30°C on Tue morning, min 23°C on Tue night). Wind will be generally light.

Friday
7
Saturday
8
Sunday
9
Monday
10
Tuesday
11
Wednesday
12
Thursday
13
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
5
1
3
2
2
2
2
1
2
2
2
2
2
2
2
1
0
1
0
0
1
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
4
SSE
12
3.5
SSE
12
2.2
S
12
1.8
S
11
1.6
S
11
1.3
SSW
11
1
ESE
13
1
E
13
0.9
ESE
13
1.1
S
10
1
S
10
0.9
S
11
1.1
SSW
11
0.9
S
11
0.7
SW
12
0.8
S
10
0.8
S
10
0.9
SSW
10
0.8
SSW
10
0.8
SSW
9
0.7
SSW
9
Wave Graph
Metric surfscale
Energy kJ
5198
3806
1321
792
629
366
367
339
286
244
218
184
314
184
138
127
127
170
128
118
86
Wind (km/h)
20
E
15
ESE
10
ESE
10
ESE
10
SE
0
W
5
ESE
10
SSE
5
WNW
5
ENE
5
SE
10
N
10
NNE
0
SSE
10
NW
5
ESE
10
ESE
5
NE
10
ESE
10
SSE
5
NNE
Wind State
cross-on
cross-on
cross-on
cross-on
on
glassy
cross-on
on
glassy
glassy
glassy
cross-off
cross-off
glassy
cross-off
glassy
cross-on
glassy
cross-on
on
glassy
High Tide
1:18PM1.32m
11:38PM1.53m
3:21PM1.41m
1:11AM1.52m
4:29PM1.55m
2:42AM1.58m
5:14PM1.67m
3:52AM1.69m
5:51PM1.75m
4:49AM1.80m
6:24PM1.81m
5:39AM1.88m
6:54PM1.83m
Low Tide
5:43PM1.14m
7:33AM0.43m
7:55PM1.22m
8:57AM0.31m
9:34PM1.16m
10:02AM0.17m
10:33PM1.05m
10:55AM0.05m
11:18PM0.92m
11:39AM-0.00m
11:58PM0.78m
12:20PM0.01m
00:35AM0.66m
thunderstorm
thunderstorm
thunderstorm
thunderstorm
part cloud
part cloud
clear
part cloud
part cloud
part cloud
thunderstorm
clear
clear
clear
clear
rain showers
thunderstorm
rain showers
thunderstorm
thunderstorm
rain showers
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:18
5:18
5:18
5:20
5:20
5:20
5:22
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:58
6:57
6:55
6:54
6:53
6:52
6:52
 mm
7
7
10
2
3
1
2
7
5
2
2
Temp °C
27
27
26
28
29
26
29
29
26
29
28
26
30
30
25
27
25
24
26
28
25
Feels °C
30
30
29
31
31
31
32
33
31
33
33
30
33
34
28
30
28
28
29
31
30
  • Map Icons:
  • Break
  • 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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