Asakawa Surf Break

Lat Long: 33.63° N 134.38° E

Asakawa Surf Forecast and Surf Report

Issued: 8 am 05 Sep 2026 (local time)

Forecast update in  hr  min

Today's Asakawa sea temperature is
29.3°C
1.9° 

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


Asakawa surf forecast from 5 Sep 2026:

  • Best quality surf: Sunday 6 Sep, 9PM (local time) - 7ft (2.2m), 11s period, ESE swell with cross-offshore winds.
  • Most powerful swell: Sunday 6 Sep, 6PM (local time) - 7.5ft (2.3m), 11s period, ESE swell with 1,146 kJ wave energy.
  • Next surfable swell (1★+): Saturday 5 Sep, 3PM (local time) - 2.5ft (0.8m), 9s 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 (Sep 05) at 3PM. The primary swell is predicted to be 0.8m and 9s period with a secondary swell of 0.7m and 7s. 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 2.3m 11s and forecast to arrive on Sunday (Sep 06) at 6PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.3m 5s period and expected on Wednesday (Sep 09) at 9PM.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+) 3PM (Sat 5th Sep)2.5ft (0.8m) 9s
Best Surf 9PM (Sun 6th Sep)7ft (2.2m) 11s
Most Powerful 6PM (Sun 6th Sep)7.5ft (2.3m) 11s

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


The Lowdown

Alright, let’s talk about what’s brewing for Asakawa.

Alright, let's be straight with you. The next 16 days are a real mixed bag for Asakawa, and honestly, there's a lot of ordinary to poor conditions to wade through before we find any silver linings. This is a point break that's inconsistent, so you’ve got to be patient. The water is sitting at a toasty 85°, which is a touch warmer than what you'd normally expect for this time of year.

The first decent window of surf kicks off on Saturday the 5th. We’re looking at surfable waves, but the conditions are pretty average. Expect chest-high 3ft of south swell, with a period around 9 seconds. The wind is a cross-offshore from the NNE, so it won't be too choppy, but it's not glassy either. The combined energy is moderate at 237, but overall, it's just ordinary.

Saturday the 5th afternoon is a bit smaller, dropping to about waist-high 3ft. Still, manageable if you just need to get wet.

Sunday the 6th is where things start to look a bit more interesting, even if the reports call it marginal. The morning brings a jump in size to 7ft from the ESE – that's solid overhead stuff. The combined energy jumps to a strong 685. The period is still a short 9 seconds, so expect dumpy, punchy waves. The afternoon gets even bigger, hitting 8ft with a longer 10-second period and energy readings of 1050. This is proper strong wave energy. But listen, the wind is a cross-off from the NNE at 9 to 12 mph, so it will be clean. This is the standout of the whole forecast, and it's for experienced surfers only. If you’re a beginner, this is way too much. For the rest of you, Sunday afternoon looks like the best bet, with the biggest swell and clean conditions from a consistent offshore wind.

Monday the 7th is still sizeable, with 5ft to 6ft from the SE in the morning and afternoon. The period drops back to 9 seconds, so it's a bit less refined, but the wind stays cross-off and gentle, keeping it clean. The energy is moderate-to-strong. Tuesday the 8th drops off a bit but still has chest-high 4ft waves with a cross-off wind; not bad, but nothing to write home about.

The middle of the week, Wednesday the 9th, sees another pulse. Morning waves are 6ft from the SE with a light cross-off breeze, making for good conditions. This is a solid, rideable day.

Thursday the 10th is a write-off. The wind cranks up from the north at 16 to 19 mph, the swell drops, and the whole day is rated as poor. Take a day off.

Friday the 11th bounces back a little with some morning chest-high 5ft from the ESE. The period is short at 7 seconds, so the energy is low, but it's clean with light winds.

And then... we hit a wall. From Saturday the 12th all the way through to the end of the forecast on Sunday the 20th, the surf just drops away. We're talking waist-high dribble and smaller, with poor conditions and onshore winds. There's a brief moment on Monday the 14th where the morning is glassy, but the swell is only 4ft and the energy is weak. After that, it's a long stretch of nothing worth paddling out for. A few days show glassy conditions late in the run, like the 16th and 19th, but with waves only 0.9ft to 1ft, it’s not going to break.

So, to sum it up: your one true standout is Sunday the 6th afternoon at Asakawa. That’s the big, powerful swell with clean cross-off winds. If you can handle heavy, overhead waves, that’s your session. The rest of the first week has a few average days, but after that, it’s a long, dry spell. This is normal for an inconsistent spot like this, so keep an eye on the forecasts, because things can change.

Rusty.

Short Range Forecast

Heavy rain (total 28mm), heaviest during Sun afternoon. Warm (max 29°C on Mon afternoon, min 22°C on Sun afternoon). Wind will be generally light.

Days 4-6 Weather Summary

Heavy rain (total 31mm), heaviest during Wed afternoon. Warm (max 29°C on Tue morning, min 21°C on Thu night). Wind will be generally light.

Saturday
5
Sunday
6
Monday
7
Tuesday
8
Wednesday
9
Thursday
10
Friday
11
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
2
2
3
1
2
2
1
1
3
2
1
0
0
0
1
2
1
1
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1
S
9
0.8
SSW
9
0.9
ESE
7
2.1
ESE
9
2.3
ESE
10
1.9
ESE
10
1.6
SE
9
1.7
SE
9
1.6
SE
10
1.3
SE
9
1
S
10
2.1
SSE
10
1.8
SE
9
1.5
SSE
9
1.2
SE
8
1.1
SE
8
1.2
SE
8
1.3
ESE
8
1.6
ESE
7
1.4
SE
7
0.8
SSE
7
Wave Graph
Metric surfscale
Energy kJ
169
106
91
671
1004
800
405
468
459
257
190
798
516
354
206
176
191
181
251
178
71
Wind (km/h)
15
NNE
15
NE
15
NNE
15
NNE
20
NNE
15
N
20
NNE
15
NE
10
N
20
NNE
15
ENE
10
NNE
10
NNE
15
NNE
25
N
25
N
20
N
10
N
10
NNE
10
NE
5
N
Wind State
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
off
cross-off
cross
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
High Tide
1:51PM1.33m
11:00PM1.46m
3:35PM1.46m
1:17AM1.44m
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
Low Tide
5:35PM1.26m
7:28AM0.46m
8:34PM1.23m
8:55AM0.35m
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
cloud
light rain
cloud
light rain
heavy rain
heavy rain
part cloud
part cloud
part cloud
clear
part cloud
mod rain
mod rain
mod rain
rain showers
light rain
cloud
light rain
light rain
part cloud
cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:37
5:39
5:39
5:39
5:41
5:41
5:41
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:23
6:22
6:21
6:19
6:17
6:16
6:15
 mm
2
2
13
11
10
6
6
1
4
4
1
Temp °C
25
25
24
25
24
23
27
29
25
29
29
26
26
25
23
22
22
21
23
25
24
Feels °C
26
27
25
27
26
23
28
31
27
29
31
30
31
28
21
21
21
21
25
28
27
  • 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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