Asakawa Surf Break

Lat Long: 33.63° N 134.38° E

Asakawa Surf Forecast and Surf Report

Issued: 8 am 01 Sep 2026 (local time)

Forecast update in  hr  min

Today's Asakawa sea temperature is
28.9°C
1.4° 

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


Asakawa surf forecast from 1 Sep 2026:

  • Best quality surf: Sunday 6 Sep, 3AM (local time) - 8ft (2.5m), 8s period, E swell with cross-offshore winds.
  • Most powerful swell: Monday 7 Sep, 12PM (local time) - 10ft (3.0m), 9s period, E swell with 1,463 kJ wave energy.
  • Next surfable swell (1★+): Tuesday 1 Sep, 9PM (local time) - 3ft (0.9m), 8s period with S 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 01) at 9PM. The primary swell is predicted to be 0.9m and 8s period with a secondary swell of 0.5m and 12s. Another secondary swell of 0.3m and 3s 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 Monday (Sep 07) at 12PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 5s period and expected on Tuesday (Sep 08) at 3PM.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+) 9PM (Tue 1st Sep)3ft (0.9m) 8s
Best Surf 3AM (Sun 6th Sep)8ft (2.5m) 8s
Most Powerful12PM (Mon 7th Sep)10ft (3.0m) 9s

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


The Lowdown

G’day, Rusty here with a look at what Asakawa’s got cookin’ over the next couple of weeks. It’s a bit of a slow burn to start, but there’s some real firepower waiting if you can be patient.

Right now, we’re in a flat spell. Tuesday the 1st sees tiny, gutless 1ft to 2ft ESE slop with onshore winds, and the combined energy is a weak 114 to 144 – not worth paddling out for. Wednesday the 2nd isn’t much better with a messy 4ft to 4ft S to SSE swell and cross-onshore breezes creating wind ripples. That energy picks up to 257 to 366, but the conditions are ordinary.

Thursday the 3rd morning is where we finally see a glimmer. It’s a small 4ft SSE swell, but the wind goes glassy – dead calm – and that’s rare magic. The break’s a point, so it’s got the shape to handle small stuff, and the water’s sitting at 84°, which is a touch warmer than normal for this time of year. That morning sesh is your best bet early on. The afternoon turns clean with a cross-offshore breeze and a slightly bigger 4ft wave.

Friday the 4th pushes into 6ft, but heavy rain and strong cross-off winds (12 mph) make it a mission. Saturday the 5th sees 7ft to 7ft ESE swell, but the wind’s cross-shore and a bit chunky. The combined energy is ramping up (736 to 693), but the quality isn’t there yet.

Monday the 7th morning is a real standout. The swell sits at a solid 7ft from the ESE with a 9-second period, and the wind is light cross-off from the NNE – that’s clean, powerful surf. The combined energy reads 809 – moderate and punchy. This is the pick of the first week for sure. Asakawa is a point break that’s inconsistent, so when it fires like this, you want to be on it. Crowds are possible here, so get in early.

We then hit a bit of a lull through Tuesday the 8th with 6ft to 7ft and cross-shore chop, before Wednesday the 9th serves up a beauty. The morning shows 10ft of SE groundswell with a 12-second period – that’s proper long-period groundswell, packing a combined energy of 2401 (strong). The wind is light cross-off from the NE. This is for experienced surfers only – 10ft is big – but if you’ve got the skill, it’s firing. A point break like Asakawa will handle that long-period energy perfectly. The afternoon stays good but gets a little cross-choppy.

Thursday the 10th holds at 10ft to 12ft with the same SE groundswell, but the wind gets gusty and unsettled, with risk of thunderstorms. The energy is huge (2893 to 2962), but conditions are marginal.

Friday the 11th is a monster – 13ft SE swell with a 12-second period. The combined energy hits 4353 – that’s very strong. But the wind is onshore from the SE, making it a messy, dangerous beast. Only absolute experts should even look at it. The afternoon stays big and bumpy.

From Saturday the 12th through Monday the 14th, the swell drops back to 5ft to 8ft, but with onshore or cross-onshore winds and risk of thunderstorms, it’s pretty poor. Tuesday the 15th sees another pulse of big, long-period groundswell – 10ft from the ESE with a 15-second period. That combined energy of 4694 is enormous, but it’s onshore and messy again. Wednesday the 16th shifts to a 6ft to 7ft SSW groundswell with a very long 16-second period, but cross-onshore winds and thunderstorms ruin the party.

All in all, the real standouts are Thursday the 3rd morning for the glassy, small-stick session, and Monday the 7th morning for that clean, solid 7ft ESE swell. Wednesday the 9th morning is the big-wave highlight for the crew who can handle it. The long-range stuff from the 15th and 16th looks promising but the wind forecast is holding it back for now.

Rusty.

Short Range Forecast

Heavy rain (total 57mm), heaviest during Thu morning. Warm (max 30°C on Tue morning, min 24°C on Wed night). Wind will be generally light.

Days 4-6 Weather Summary

Heavy rain (total 115mm), heaviest during Fri morning. Warm (max 26°C on Sat morning, min 21°C on Fri night). Wind will be generally light.

Tuesday
1
Wednesday
2
Thursday
3
Friday
4
Saturday
5
Sunday
6
Monday
7
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
0
0
1
0
0
0
1
2
3
2
1
1
2
2
2
2
2
3
3
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)
0.4
ESE
13
0.5
E
12
0.9
S
8
1.1
S
8
1.3
SSE
9
1
S
8
1.1
SSE
8
1.3
SSE
10
1.9
SSE
10
1.7
SSE
9
1.7
SSE
8
1.2
SSE
8
2
ESE
8
2.1
ESE
8
2.3
ESE
9
1.9
ESE
8
2.3
ESE
8
2.5
ESE
8
2.2
ESE
9
1.8
ESE
9
1.4
ESE
9
Wave Graph
Metric surfscale
Energy kJ
59
80
105
177
268
147
153
320
717
484
388
188
483
547
785
454
722
977
778
516
281
Wind (km/h)
5
SSE
10
SSE
0
SW
10
E
10
SE
5
SE
5
NNE
15
NE
10
NNE
15
NE
20
NNE
20
NNE
20
NE
15
E
10
ENE
10
NE
10
E
5
NNW
10
NNE
10
NE
10
N
Wind State
on
on
glassy
cross-on
cross-on
on
glassy
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross
cross
cross-off
cross
glassy
cross-off
cross-off
cross-off
High Tide
8:03PM1.78m
8:53AM1.61m
8:30PM1.72m
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
Low Tide
2:01PM0.58m
2:31AM0.33m
2:32PM0.75m
3:16AM0.36m
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
clear
clear
rain showers
thunderstorm
thunderstorm
thunderstorm
heavy rain
rain showers
rain showers
heavy rain
heavy rain
rain showers
part cloud
part cloud
rain showers
rain showers
light rain
rain showers
light rain
thunderstorm
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:35
5:35
5:37
5:37
5:37
5:39
5:39
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:29
6:28
6:25
6:24
6:23
6:22
6:21
 mm
1
3
5
16
16
7
9
52
29
25
1
2
1
5
2
3
Temp °C
30
30
26
28
29
26
24
25
24
24
23
23
26
25
24
25
26
25
28
28
26
Feels °C
32
33
31
32
33
31
28
28
27
27
24
24
26
26
25
27
29
29
31
31
29
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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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