Asakawa Surf Break

Lat Long: 33.63° N 134.38° E

Asakawa Surf Forecast and Surf Report

Issued: 2 pm 29 Aug 2026 (local time)

Forecast update in  hr  min

Today's Asakawa sea temperature is
29.1°C
1.5° 

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


Asakawa surf forecast from 29 Aug 2026:

  • Best quality surf: Saturday 5 Sep, 3PM (local time) - 7.5ft (2.3m), 8s period, ESE swell with cross-offshore winds.
  • Most powerful swell: Saturday 5 Sep, 9PM (local time) - 8ft (2.5m), 9s period, ESE swell with 1,228 kJ wave energy.
  • Next surfable swell (1★+): Sunday 30 Aug, 12AM (local time) - 3ft (0.9m), 7s 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 Sunday (Aug 30) at 12AM. The primary swell is predicted to be 0.9m and 7s period with a secondary swell of 0.3m and 11s. Another secondary swell of 1.0m and 5s is also forecast. 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 Saturday (Sep 05) at 9PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 4s period and expected on Saturday (Sep 05) at 12AM.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+)12AM (Sun 30th Aug)3ft (0.9m) 7s
Best Surf 3PM (Sat 5th Sep)7.5ft (2.3m) 8s
Most Powerful 9PM (Sat 5th Sep)8ft (2.5m) 9s

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


The Lowdown

Alright, let’s get into it.

The next couple weeks are a bit of a slow burn, but there’s definitely a couple of windows worth circling on the calendar, especially into the first full week of September.

The start of the run, from Saturday the 29th through the 2nd, is pretty flat and messy. We’ve got small, grovely swell in the 2ft to 5ft range, but the wind is messy and it’s not doing us any favors. Saturday afternoon’s got a bit of push but it’s cross-on and choppy, so it’s a pass. Sunday morning’s got a tiny bit of clean glass, but at 4ft it’s not worth getting too excited about. We get a couple of small, short-period pulses through Monday and Tuesday, but they’re all cross-on or onshore and the wave comment is straight-up poor. It’s pretty much a wasteland until midweek.

Now, Wednesday the 3rd is when things start to get interesting. It’s still small early with a glassy 3ft from the south at 8 seconds, but the afternoon is the first real standout. Swell jumps to 6ft from the ESE with a 7-second period, and the wind is light and cross-off, cleaning it up nicely. The energy is still moderate at 494, but the conditions are looking good. This is the first time we can actually paddle out with some hope.

The 5th is another one to circle. Saturday morning is glassy but small at 3ft. Then the afternoon: boom. The swell is up to 8ft from the ESE with an 8-second period, energy jumps to 816, and we get a clean cross-off with barely any wind. That’s going to be proper fun at Asakawa (Point). Consistent enough to make it worth your while.

Then we get into the meaty part. Sunday the 6th and Monday the 7th see the swell really fill in, but it gets big and a bit wild. We’re talking 10ft to 12ft from the ESE with moderate to fresh cross-shore winds. That’s expert territory, and it’s probably going to be a bit of a washing machine. The morning of the 7th is 12ft and cross-shore, but look at Monday afternoon – the wind drops to glassy, the swell eases to 10ft from the ESE at 11 seconds, and the energy is off the charts at 2329. That right there is the standout of the whole run. It’s big, but it’s clean and glassy, and if you’re experienced, you’ll be licking your lips.

Tuesday and Wednesday the 8th and 9th keep the good times rolling. Tuesday’s still solid at 8ft from the ESE with a 12 to 13-second period, but the wind is cross-shore to onshore. Wednesday morning, though, is another gem: glassy, 7ft from the ESE with a 13-second period, and the energy is still strong at 1799. Excellent conditions for those who know what they’re doing.

After that, we start to fade. From the 10th onwards, the size drops back under 7ft, and the wind gets up out of the north, turning everything cross-off and clean but cutting the energy. Thursday and Friday have some small, clean leftovers, but it’s getting marginal. By the weekend of the 12th and 13th, we’re down to tiny, short-period leftovers in the 2ft range, and the wind is howling 45 to 55 km/h out of the north. That’s not surfable for a paddle.

So, bottom line: the first few days are a write-off, then Wednesday the 3rd afternoon gives us a first taste, and then the real show is from Saturday the 5th afternoon through to Wednesday the 9th. If you can only make one session, make it Monday the 7th afternoon – that’s the jewel. Wednesday the 9th morning is a close second. After that, it’s time to hang up the wetsuit for a few days.

The water’s running a touch warmer than normal at 84°, so that’s nice, but the crowds at Asakawa can be a factor, so worth getting in early for those clean windows.

Rusty out.

Short Range Forecast

Light rain (total 7mm), mostly falling on Sat afternoon. Warm (max 31°C on Sat afternoon, min 25°C on Mon night). Wind will be generally light.

Days 5-7 Weather Summary

Moderate rain (total 19mm), heaviest on Thu afternoon. Warm (max 29°C on Tue afternoon, min 24°C on Thu afternoon). Wind will be generally light.

Sat
29
Sunday
30
Monday
31
Tuesday
1
Wednesday
2
Thursday
3
Friday
4
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
0
1
1
0
1
0
0
0
0
0
1
0
0
1
1
2
2
1
0
1
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.3
SSW
5
0.9
SSW
7
1.1
SW
8
0.8
SSW
7
0.9
SSW
7
0.7
S
8
0.6
S
8
0.6
S
8
0.4
ESE
13
0.8
S
8
1
S
8
1
S
8
1
S
8
1
SSE
8
0.8
S
10
1.7
ESE
7
1.1
ESE
8
1
ESE
8
0.9
S
9
0.9
ESE
8
Wave Graph
Metric surfscale
Energy kJ
73
91
129
73
76
71
51
47
59
89
131
136
144
144
121
255
169
147
130
117
Wind (km/h)
15
SW
10
W
5
ESE
10
SSW
5
W
5
S
15
S
5
SW
5
SSE
15
SSE
5
SSW
10
SE
15
SE
0
WNW
5
NE
10
NE
5
NNE
5
ESE
10
SSE
5
S
Wind State
cross-on
cross-off
glassy
cross-on
cross-off
cross-on
cross-on
cross
on
on
glassy
on
on
glassy
glassy
cross-off
cross-off
cross-on
on
glassy
High Tide
6:52PM1.81m
6:48AM1.84m
7:14PM1.82m
7:26AM1.80m
7:38PM1.81m
8:07AM1.73m
8:03PM1.78m
8:53AM1.61m
8:30PM1.72m
9:51AM1.47m
9:02PM1.65m
11:18AM1.35m
9:43PM1.56m
Low Tide
00:48AM0.49m
1:02PM0.31m
1:19AM0.40m
1:31PM0.43m
1:53AM0.35m
2:01PM0.58m
2:31AM0.33m
2:32PM0.75m
3:16AM0.36m
3:06PM0.93m
4:13AM0.42m
3:51PM1.11m
thunderstorm
clear
clear
thunderstorm
thunderstorm
clear
clear
clear
clear
clear
rain showers
cloud
part cloud
thunderstorm
light rain
light rain
light rain
rain showers
thunderstorm
thunderstorm
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:33
5:35
5:35
5:35
5:37
5:37
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:32
6:30
6:30
6:29
6:28
6:25
6:24
 mm
2
3
2
2
4
3
5
3
2
2
2
Temp °C
31
27
30
30
27
30
30
26
30
29
26
28
29
26
26
25
25
28
28
26
Feels °C
34
31
35
34
31
32
32
30
32
31
31
31
32
30
31
29
30
32
32
31
  • 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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