Asakawa Surf Break

Lat Long: 33.63° N 134.38° E

Asakawa Surf Forecast and Surf Report

Issued: 2 pm 09 Sep 2026 (local time)

Forecast update in  hr  min

Today's Asakawa sea temperature is
28.0°C
0.8° 

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


Asakawa surf forecast from 9 Sep 2026:

  • Best quality surf: Tuesday 15 Sep, 3AM (local time) - 5ft (1.6m), 9s period, SE swell with cross-offshore winds.
  • Most powerful swell: Tuesday 15 Sep, 3AM (local time) - 5ft (1.6m), 9s period, SE swell with 427 kJ wave energy.
  • Next surfable swell (1★+): Thursday 10 Sep, 12PM (local time) - 3.5ft (1.0m), 8s 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 Thursday (Sep 10) at 12PM. The primary swell is predicted to be 1.0m and 8s period with a secondary swell of 0.1m and 16s. 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 1.6m 9s and forecast to arrive on Tuesday (Sep 15) at 3AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.2m 6s period and expected on Thursday (Sep 10) at 3AM.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+)12PM (Thu 10th Sep)3.5ft (1.0m) 8s
Best Surf 3AM (Tue 15th Sep)5ft (1.6m) 9s
Most Powerful 3AM (Tue 15th Sep)5ft (1.6m) 9s

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


The Lowdown

Alright, Rusty here. Let’s have a look at what’s cookin’ at Asakawa over the next couple of weeks.

Straight up, the first week is a write-off. You’re lookin’ at a long, flat spell from now until about the 14th. Small, weak waves with lousy wind and ordinary conditions. Not worth paddlin’ out for.

Things finally start to stir on Monday the 14th. The morning shows some promise with a 4ft swell from the ESE, period around 9 seconds, and glassy conditions. The combined energy’s moderate at 363, so there’s some push there. It’s only an intermediate-level wave, so nothin’ too heavy, but with the glass, it’ll be clean.

Tuesday the 15th morning is a similar story – 4ft from the ESE, glassy again, decent energy at 282. That’s your best early-week option. Small, but clean and fun on the point.

Now, hold on to your board. The real standout is Saturday the 19th through Monday the 21st. We’ve got a proper pulse comin’ in. On Saturday afternoon, we’re lookin’ at a 15ft swell from the SE with a very long 16-second period – that’s groundswell, folks. Combined energy is through the roof at 9688, strong stuff. Sunday the 20th afternoon pumps even bigger: 20ft from the SSE, period 16 seconds, and energy at 19230 – that’s a serious wall of water. This is expert territory, over 8ft. The wind is light cross or cross-on, which keeps things manageable, but the quality is marked as marginal due to tide. Still, for the experienced crew, this is the best on offer.

Monday the 21st settles a touch: 10ft from the SSE in the morning, 12-second period, clean cross-off wind. Then afternoon it backs to 8ft from the SE, glassy, with energy at 1457. Excellent conditions for experienced surfers.

The water temp is 82°, which is about normal for this time of year with a +0.8° anomaly – nothin’ wild.

Asakawa is a point break and inconsistent, so these waves won’t be rollin’ through every set, but when they do, that long-period groundswell will wrap in nicely. The swell direction is SE to SSE, and the optimum is SE, so that’s a good match.

After Monday, it drops off again. Wednesday the 23rd gets messy with onshore wind and choppy surf, and Thursday the 24th afternoon sees a small, clean 5ft from the SE with 14-second period and glassy offshore wind – a nice little tail-end wave for the patient surfer.

Keep your eyes on that weekend – it’s the main event, but it’s a long way out, so treat the size and timing as promising but not locked in.

Rusty.

Short Range Forecast

Heavy rain (total 23mm), heaviest during Fri morning. Warm (max 27°C on Sat morning, min 21°C on Wed night). Wind will be generally light.

Days 5-7 Weather Summary

Heavy rain (total 45mm), heaviest during Mon night. Warm (max 28°C on Sun morning, min 23°C on Mon afternoon). Wind will be generally light.

Wed
9
Thursday
10
Friday
11
Saturday
12
Sunday
13
Monday
14
Tuesday
15
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
1
0
0
1
1
1
1
1
1
0
1
0
0
1
2
1
2
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)
1.8
SSE
8
1.2
SSE
8
1
SSE
8
1
SSE
8
1
SSE
8
0.9
SSE
8
0.9
SSE
8
1
S
7
1
S
7
1.2
S
6
0.5
ESE
9
0.3
E
13
0.8
SE
9
1.1
SE
9
1.1
ESE
9
1.1
SE
9
1.4
SE
9
1.3
ESE
9
1.1
SE
9
1
SE
9
Wave Graph
Metric surfscale
Energy kJ
434
202
136
123
117
88
94
109
89
89
46
32
95
182
194
190
338
270
197
152
Wind (km/h)
20
N
25
NNE
15
NNE
10
NNE
0
NNE
5
NE
5
NE
5
NNW
0
ENE
10
S
5
S
5
SE
10
SSE
5
SSE
5
SSE
5
ESE
5
NW
5
NNE
0
SSE
5
WNW
Wind State
cross-off
cross-off
cross-off
cross-off
glassy
glassy
cross-off
glassy
glassy
cross-on
glassy
on
on
glassy
glassy
glassy
off
glassy
glassy
glassy
High Tide
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
8:09AM1.67m
7:43PM1.73m
Low Tide
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
1:50PM0.72m
2:19AM0.34m
rain showers
part cloud
cloud
light rain
part cloud
mod rain
rain showers
rain showers
thunderstorm
thunderstorm
thunderstorm
thunderstorm
clear
thunderstorm
rain showers
light rain
heavy rain
light rain
thunderstorm
light rain
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:41
5:41
5:43
5:43
5:43
5:45
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:17
6:16
6:15
6:14
6:13
6:10
6:09
 mm
1
2
8
5
3
4
6
3
1
3
3
5
22
2
2
4
Temp °C
25
23
24
22
23
24
25
25
27
27
25
28
28
25
27
24
23
25
25
23
Feels °C
26
22
25
24
27
29
30
30
32
31
29
31
32
30
31
29
26
29
30
27
  • 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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