Asakawa Surf Break

Lat Long: 33.63° N 134.38° E

Asakawa Surf Forecast and Surf Report

Issued: 2 am 08 Sep 2026 (local time)

Forecast update in  hr  min

Today's Asakawa sea temperature is
28.5°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 Sep 2026:

  • Best quality surf: Tuesday 8 Sep, 6PM (local time) - 8ft (2.5m), 10s period, SSE swell with glassy winds.
  • Most powerful swell: Wednesday 9 Sep, 6AM (local time) - 10ft (3.0m), 9s period, S swell with 1,406 kJ wave energy.
  • Next surfable swell (1★+): Tuesday 8 Sep, 6PM (local time) - 8ft (2.5m), 10s 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 (Sep 08) at 6PM. The primary swell is predicted to be 2.5m and 10s period with a secondary swell of 1.9m and 10s. Another secondary swell of 1.2m and 8s is also forecast. 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 9s and forecast to arrive on Wednesday (Sep 09) at 6AM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 5s period and expected on Wednesday (Sep 09) at 9PM.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+) 6PM (Tue 8th Sep)8ft (2.5m) 10s
Best Surf 6PM (Tue 8th Sep)8ft (2.5m) 10s
Most Powerful 6AM (Wed 9th Sep)10ft (3.0m) 9s

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


The Lowdown

Alright, Rusty here, let's talk about what's cooking at Asakawa over the next couple of weeks.

It's a bit of a slow start, but there's a proper pulse of energy building for the second week that has me sitting up straight. We're looking at a classic point break setup, and while it's inconsistent, when it does fire, it can be a gem. The water is sitting at 83°, which is a touch warmer than normal for this time of year, so you can leave the steamer at home.

The first few days are pretty ordinary. Tuesday morning, we've got a 5ft south swell with a 9-second period, but it's cross-shore and a bit messy with a risk of thunderstorms. The combined energy is moderate at 590. It's surfable, but nothing to write home about. Wednesday sees a bump in size with a 10ft SSE swell, but the wind is straight onshore and strong, which will just chop it up. Thursday and Friday clean up nicely with light glassy conditions and a cross-offshore breeze, but the swell drops right back to 3ft to 4ft. The energy is weak, only around 130-240. It's small, clean, and fun for a longboard, but it's not going to get the heart pumping.

Saturday and Sunday are tiny and poor, with the swell fading to 1ft. There's a real lull here for a few days.

Then, things get interesting. Monday, the 14th of September, we see a new ESE swell pushing in at 5ft with a 9-second period, and the wind goes glassy calm. The energy jumps to 587. This is looking pretty good. The morning of Tuesday the 15th holds clean with 4ft, but the afternoon turns onshore and poor.

Now, the real standout. Look at the 21st of September, Monday. The forecast is for a 6ft swell from the SE, but the period – that's a 16-second groundswell, very long period. The combined energy is a massive 2300. The wind is offshore from the NNW, clean and glassy. For a point break like Asakawa, a long period SE swell with offshore wind is the recipe for some seriously good, lined-up waves. This is for experienced surfers though, as that energy is strong. The following day, Tuesday the 22nd, holds similar quality with a 8ft ESE swell, also a 15-second period and offshore wind, energy at 3433. This is the best of the forecast. After that, it drops off quickly by Wednesday the 23rd.

So, to sum it up: the first week is small and average. The absolute standout is that Monday the 21st and Tuesday the 22nd of September. The swell direction (SE and ESE) is a perfect match for the optimum (SE), the wind is offshore, and the wave energy is pumping. Get ready for that. It's a bit of a wait, but it could be worth every second.

Stay stoked, Rusty.

Short Range Forecast

Heavy rain (total 49mm), heaviest during Tue morning. Warm (max 27°C on Tue afternoon, min 21°C on Wed night). Wind will be generally light.

Days 4-6 Weather Summary

Heavy rain (total 23mm), heaviest during Fri afternoon. Warm (max 28°C on Sun morning, min 24°C on Fri night). Wind will be generally light.

Tuesday
8
Wednesday
9
Thursday
10
Friday
11
Saturday
12
Sunday
13
Monday
14
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
2
3
0
2
0
1
1
1
1
1
1
1
1
1
0
0
0
2
2
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
S
9
1.8
S
9
2.5
S
10
3
SSE
9
2.4
SSE
9
1.3
SSE
8
1.3
SSE
8
1.3
SSE
9
1.2
SSE
8
1
SSE
8
1
SSE
8
0.9
SSE
7
0.9
SSE
7
0.7
SSE
7
0.6
S
7
0.3
E
13
0.3
E
13
0.7
ESE
9
1.3
ESE
9
1.5
ESE
9
1.3
ESE
9
Wave Graph
Metric surfscale
Energy kJ
375
551
1363
1236
803
237
212
228
184
123
120
76
75
47
36
33
34
71
268
351
292
Wind (km/h)
10
E
10
SE
5
S
20
S
10
SSW
15
N
15
N
15
NNE
5
NNE
5
ESE
5
S
5
NNE
5
NNE
5
SE
0
SSW
10
ESE
10
SE
10
ESE
5
ESE
0
N
5
N
Wind State
cross
cross-on
cross-on
on
cross-on
cross-off
cross-off
cross-off
cross-off
glassy
glassy
glassy
glassy
glassy
glassy
cross-on
cross-on
cross-on
glassy
glassy
glassy
High Tide
4:52PM1.68m
3:59AM1.68m
5:21PM1.76m
4:49AM1.79m
5:47PM1.81m
5:34AM1.87m
6:13PM1.84m
6:15AM1.89m
6:37PM1.84m
6:54AM1.85m
7:00PM1.83m
7:31AM1.78m
7:22PM1.79m
Low Tide
9:55AM0.25m
10:28PM0.91m
10:41AM0.18m
11:04PM0.73m
11:20AM0.16m
11:38PM0.57m
11:55AM0.21m
00:11AM0.43m
12:27PM0.30m
00:43AM0.33m
12:57PM0.43m
1:15AM0.29m
1:24PM0.57m
1:46AM0.29m
mod rain
thunderstorm
rain showers
thunderstorm
thunderstorm
light rain
light rain
part cloud
part cloud
rain showers
thunderstorm
rain showers
rain showers
thunderstorm
thunderstorm
thunderstorm
thunderstorm
mod rain
thunderstorm
thunderstorm
light rain
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:39
5:41
5:41
5:41
5:43
5:43
5:43
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:19
6:17
6:16
6:15
6:14
6:13
6:10
 mm
10
8
12
6
4
5
4
1
4
1
2
4
2
2
1
6
3
1
5
Temp °C
26
27
27
27
27
22
23
25
24
26
27
25
27
27
26
28
28
26
26
26
25
Feels °C
31
32
33
30
32
23
25
26
28
31
32
30
32
32
32
31
32
31
31
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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