Asakawa Surf Break

Lat Long: 33.63° N 134.38° E

Asakawa Surf Forecast and Surf Report

Issued: 8 am 07 Sep 2026 (local time)

Forecast update in  hr  min

Today's Asakawa sea temperature is
28.9°C
1.6° 

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: Wednesday 9 Sep, 12AM (local time) - 6ft (1.8m), 9s period, S swell with cross-offshore winds.
  • Most powerful swell: Wednesday 9 Sep, 6AM (local time) - 8ft (2.5m), 9s period, SSE swell with 1,098 kJ wave energy.
  • Next surfable swell (1★+): Monday 7 Sep, 9PM (local time) - 5ft (1.6m), 9s 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 Monday (Sep 07) at 9PM. The primary swell is predicted to be 1.6m and 9s period with a secondary swell of 0.8m 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 2.5m 9s and forecast to arrive on Wednesday (Sep 09) at 6AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.4m 5s period and expected on Wednesday (Sep 09) at 9PM.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+) 9PM (Mon 7th Sep)5ft (1.6m) 9s
Best Surf12AM (Wed 9th Sep)6ft (1.8m) 9s
Most Powerful 6AM (Wed 9th Sep)8ft (2.5m) 9s

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


The Lowdown

Alright, Rusty here. Let’s take a look at what’s on offer.

Alright, let’s be straight with you – the next 16 days are a bit of a mixed bag at Asakawa. We’ve got some windows of opportunity, but nothing that’s screaming epic. The water is sitting at 84°, which is a touch warmer than normal for this time of year, so you won’t need a thick suit.

The first real chance to get wet comes on Monday, September 7th. It’s not a classic, with a 5ft to 6ft SE swell pushing through, but the wind is a cross-off from the N to NNE, keeping things clean. The combined energy is moderate, around 566 to 573. It’s a bit raw, but surfable.

Tuesday, the 8th, actually looks like the pick of the early week. The swell drops a touch to 4ft, but it switches to a clean S direction. The wind is a light cross-off from the NNE, and the combined energy is still decent at 471 to 483. This is the best quality you’ll see in the first week – clean, fun little waves.

Now, Wednesday the 9th gets a bit tricky. The swell jumps up to 8ft from the SSE, which is a bit of a handful, and the wind swings onshore from the SSE with a risk of thunderstorms. The combined energy spikes to 841, but the quality is poor. It’s going to be a messy, lumpy day. Not for beginners.

From Thursday the 10th through to the end of the first week, it really fades. Swell drops under 3ft, and the energy falls off a cliff. There’s a brief moment on Friday the 11th with glassy conditions and 3ft, but it’s weak. The 12th and 13th are similar – small, inconsistent, and mostly flat.

The second week doesn’t offer much hope. There’s a tiny pulse on Tuesday the 15th with 4ft ESE swell and glassy conditions, but it’s fleeting and the energy is low at 270. After that, it’s a long, slow fade into tiny, weak waves for the rest of the period. The 19th has a 4ft SSW swell, but it’s a short period and the wind is onshore.

Honestly, if you’re looking for the best of a bad bunch, aim for Tuesday the 8th. That’s the standout. It’s not big, but it’s clean, and the direction is right for Asakawa. The rest is mostly for the die-hards or those happy to sit on a longboard in small, clean conditions. It’s a quiet run.

Rusty.

Short Range Forecast

Heavy rain (total 58mm), heaviest during Wed morning. Warm (max 27°C on Mon afternoon, min 23°C on Wed night). Wind will be generally light.

Days 4-6 Weather Summary

Moderate rain (total 17mm), heaviest on Thu afternoon. Warm (max 28°C on Sat morning, min 22°C on Thu afternoon). Wind will be generally light.

Monday
7
Tuesday
8
Wednesday
9
Thursday
10
Friday
11
Saturday
12
Sunday
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)
1
1
2
2
2
3
1
1
0
0
1
1
1
1
1
1
0
1
1
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)
1.6
SE
9
1.8
SE
9
1.4
SE
8
1.3
S
9
1.3
S
9
1.8
S
9
2.3
SSE
9
1.7
SSE
8
1.1
SE
8
0.8
SE
8
1.1
SE
8
1.1
SE
8
0.9
SSE
8
0.9
SSE
7
0.9
SSE
7
0.7
S
7
0.7
SSE
7
0.6
S
7
0.6
ESE
9
0.6
S
11
1
ESE
9
Wave Graph
Metric surfscale
Energy kJ
406
540
283
287
280
544
829
379
154
69
147
143
101
84
66
47
49
36
55
86
157
Wind (km/h)
20
N
15
NNE
10
NNE
10
NNE
10
NNE
10
NE
15
SSE
20
N
20
N
20
NNE
10
N
5
NNE
0
E
5
E
5
NNE
5
ESE
10
SSE
0
SW
5
ESE
5
SE
5
NW
Wind State
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
on
cross-off
cross-off
cross-off
cross-off
glassy
glassy
glassy
glassy
glassy
on
glassy
glassy
on
glassy
High Tide
4:19PM1.58m
2:54AM1.54m
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
Low Tide
9:45PM1.08m
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
mod rain
rain showers
cloud
light rain
rain showers
heavy rain
thunderstorm
rain showers
part cloud
cloud
mod rain
light rain
rain showers
thunderstorm
part cloud
part cloud
thunderstorm
thunderstorm
thunderstorm
thunderstorm
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:39
5:39
5:41
5:41
5:41
5:43
5:43
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:21
6:19
6:17
6:16
6:15
6:14
6:13
 mm
6
1
3
2
23
22
1
10
2
1
2
1
1
1
2
Temp °C
25
27
25
26
27
27
27
26
25
23
22
23
26
26
24
28
28
26
28
28
25
Feels °C
27
28
27
29
31
32
31
28
26
23
23
27
31
31
28
33
33
32
32
32
30
  • 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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