Asakawa Surf Break

Lat Long: 33.63° N 134.38° E

Asakawa Surf Forecast and Surf Report

Issued: 8 am 03 Sep 2026 (local time)

Forecast update in  hr  min

Today's Asakawa sea temperature is
29.1°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 3 Sep 2026:

  • Best quality surf: Monday 7 Sep, 3AM (local time) - 13ft (4.0m), 10s period, E swell with cross-offshore winds.
  • Most powerful swell: Monday 7 Sep, 3AM (local time) - 13ft (4.0m), 10s period, E swell with 3,208 kJ wave energy.
  • Next surfable swell (1★+): Thursday 3 Sep, 6PM (local time) - 4.5ft (1.3m), 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 Thursday (Sep 03) at 6PM. The primary swell is predicted to be 1.3m and 10s period with a secondary swell of 0.4m and 10s. 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 4.0m 10s and forecast to arrive on Monday (Sep 07) 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 5s period and expected on Friday (Sep 04) at 3PM.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+) 6PM (Thu 3rd Sep)4.5ft (1.3m) 10s
Best Surf 3AM (Mon 7th Sep)13ft (4.0m) 10s
Most Powerful 3AM (Mon 7th Sep)13ft (4.0m) 10s

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


The Lowdown

Righto, let’s get stuck into this one. Over the next 16 days, we’ve got a bit of a mixed bag here at Asakawa. It’s a point break that’s inconsistent, but when it lines up, it can really deliver. The water temp is sitting at 84° which is a touch warmer than normal for this time of year, so you’ll be in boardies for sure.

The start is a bit quiet. Thursday the 3rd sees some small 4ft to 4ft SSE swell, and while the morning glass-off is a dream, the energy is only moderate, and it’s just surfable, nothing to get excited about. Friday the 4th comes in a little cleaner with a 5ft S swell and a 10-second period, energy picking up, but we’ve got a fair bit of rain around and a cross-off wind that’s keeping it clean enough. Still, the quality isn’t quite there.

Saturday the 5th drops right off. Swell drops to 3ft and the energy is weak. That’s a day to leave the board in the car.

Now, the real action starts on Sunday the 6th. The morning brings a 5ft ESE swell with 9-second period and moderate energy. It’s looking good. But the standout? Sunday afternoon. The swell bumps to a solid 7ft from the east, period hitting 10 seconds, and the combined energy jumps to 844 – that’s strong. Winds are light and cross-off, so the waves will be clean. This is a winner. Monday the 7th morning is also pumping with 7ft ESE swell and 716 energy, and Tuesday the 8th holds strong with 6ft to 6ft SE swell and energy in the 660-690 range. This stretch from Sunday afternoon through Tuesday is the best on offer. Clean, consistent, and solid waves for the intermediate crew.

Wednesday the 9th has glassy conditions and 6ft to 6ft SE swell, but the energy drops a bit, so still good but not the standout.

There’s a bit of a lull from Thursday the 10th through to Monday the 14th, with waves dropping to 4ft to 5ft. The wind stays messy at times, and on Thursday afternoon we get a 30 km/h onshore blow that’s just poor. Not worth paddling out for.

Tuesday the 15th shows a building 6ft ESE swell, but the period is short at 7 seconds, and the energy is moderate. The afternoon jumps to 8ft ESE with 806 energy, but the wind goes onshore and the conditions are marginal. This is more for the experts if they’re keen, but the quality is questionable.

Now for the big one – Wednesday the 16th morning. This is the true standout of the whole outlook. A 10ft SSE swell with a 9-second period, and the combined energy is massive at 1329. Glassy conditions, clear skies. This is big, powerful surf. At 10ft it’s expert territory, no doubt. The afternoon cranks up to 13ft from the south with a 12-second period and an energy reading of 4477 – that’s very strong. But the wind swings cross-on and it gets choppy, so the morning window is the one to chase. This is a serious swell.

After that, Thursday the 17th morning drops to 5ft S swell with glassy conditions again, energy at 482. A good cleanup wave. Friday the 18th fades fast to 2ft S swell and weak energy, and it’s pretty ordinary.

Overall, don’t bother with the first few days or the middle lull. Your two real standouts are Sunday afternoon the 6th through Tuesday the 8th for clean, solid intermediate waves, and then the big one on Wednesday the 16th morning for the experts – that’s a session to remember. Keep an eye on the forecast for that one.

Rusty

Short Range Forecast

Heavy rain (total 86mm), heaviest during Fri afternoon. Warm (max 29°C on Thu afternoon, min 22°C on Fri afternoon). Wind will be generally light.

Days 4-6 Weather Summary

Heavy rain (total 36mm), heaviest during Tue afternoon. Warm (max 26°C on Sun afternoon, min 24°C on Sun morning). Wind will be generally light.

Thursday
3
Friday
4
Saturday
5
Sunday
6
Monday
7
Tuesday
8
Wednesday
9
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
1
1
2
0
0
0
2
3
1
3
1
2
3
3
1
2
2
1
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.1
SSE
8
1.2
SSE
10
1.5
S
10
1.5
S
10
1.4
S
10
1.8
E
7
0.8
S
8
0.8
S
8
1
ESE
9
1.6
ESE
9
2
E
10
2.5
ESE
10
2
ESE
9
1.7
ESE
9
1.4
SE
9
1.8
SE
10
1.9
SE
10
1.8
SE
9
1.8
SE
9
1.7
SE
9
1.8
SE
9
Wave Graph
Metric surfscale
Energy kJ
157
294
450
426
369
329
82
84
158
388
799
1170
680
464
338
589
660
564
526
461
531
Wind (km/h)
5
W
5
ENE
5
N
15
NNE
20
NNE
10
N
20
N
25
NE
15
NNE
15
NNE
10
NE
20
ENE
15
NNE
20
NNE
10
N
15
NNE
10
NNE
5
E
5
SSE
5
SE
20
NNE
Wind State
glassy
cross
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross
cross-off
cross-off
cross-off
cross-off
cross-off
cross-on
glassy
glassy
cross-off
High Tide
9:51AM1.47m
9:02PM1.65m
11:18AM1.35m
9:43PM1.56m
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
Low Tide
3:06PM0.93m
4:13AM0.42m
3:51PM1.11m
5:37AM0.48m
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
thunderstorm
thunderstorm
light rain
heavy rain
heavy rain
heavy rain
part cloud
part cloud
cloud
cloud
part cloud
light rain
light rain
rain showers
part cloud
rain showers
mod rain
heavy rain
mod rain
mod rain
mod rain
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:37
5:37
5:37
5:39
5:39
5:39
5:41
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:25
6:24
6:23
6:22
6:21
6:19
6:17
 mm
2
1
1
20
50
12
5
4
1
2
8
16
10
8
9
Temp °C
27
29
25
24
23
22
28
28
24
25
26
25
25
25
24
26
25
26
27
27
26
Feels °C
33
34
28
26
24
22
27
28
25
27
28
26
28
26
26
28
29
31
33
33
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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