Asakawa Surf Break

Lat Long: 33.63° N 134.38° E

Asakawa Surf Forecast and Surf Report

Issued: 8 am 26 Aug 2026 (local time)

Forecast update in  hr  min

Today's Asakawa sea temperature is
28.8°C
1.1° 

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


Asakawa surf forecast from 26 Aug 2026:

  • Best quality surf: Friday 28 Aug, 9PM (local time) - 2.5ft (0.8m), 7s period, S swell with glassy winds.
  • Most powerful swell: Wednesday 2 Sep, 12PM (local time) - 11ft (3.5m), 15s period, SSE swell with 5,839 kJ wave energy.
  • Next surfable swell (1★+): Friday 28 Aug, 9PM (local time) - 2.5ft (0.8m), 7s 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 Friday (Aug 28) at 9PM. The primary swell is predicted to be 0.8m and 7s period with a secondary swell of 0.4m and 9s. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Asakawa in the next 16 days are 3.5m 15s and forecast to arrive on Wednesday (Sep 02) at 12PM. Winds are predicted to be onshore at the time the swell arrives.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+) 9PM (Fri 28th Aug)2.5ft (0.8m) 7s
Best Surf 9PM (Fri 28th Aug)2.5ft (0.8m) 7s
Most Powerful12PM (Wed 2nd Sep)11ft (3.5m) 15s

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


The Lowdown

Alright, Rusty here. Let’s take a look at what Asakawa has in store.

Right now, Asakawa is a bit of a waiting game. The water temp is sitting at a toasty 84°F, which is a touch warmer than normal for this time of year. That’s nice, but the surf just isn’t there to start with. We’ve got a long dry spell before anything decent shows up. From now through the end of August, and well into the first week of September, conditions are pretty grim. You’ll see small, weak swells with poor winds and a lot of chop. There’s a couple of glassy mornings – Saturday the 29th and Sunday the 30th – where you could squeak out a surfable wave on the small stuff (3ft to 3ft), but honestly, the energy is weak (71 to 135 combined) and the swell period is short, so it’s pretty ordinary. Nothing worth getting excited about.

Then there’s a big gap of surfable but ugly conditions. The winds are onshore, swells get messy, and even when a bigger groundswell tries to push in around the 1st and 2nd of September, it’s accompanied by strong winds and risk of t-storms. The energy ramps up huge (4186 to 4763 combined) with 10ft swell and a long 15-16 second period on the 2nd, but with onshore winds and that exposed point, it’s a washing machine. Not for paddling – looks more interesting for kite surfing if you’re into that.

The real standout, the one to circle on your calendar, is the 8th of September (Tuesday) into the 9th. On the 8th morning, we’ve got a solid 13ft S swell (period 12 seconds) pouring in with a light offshore from the NNW. The energy is massive (7079 combined). This is exceptional – but listen, it’s big and powerful. This is for experts only, no question. By the afternoon of the 8th, the wind goes glassy and the swell drops a touch to 12ft, still excellent, still only for the crew who know what they’re doing.

The 9th of September morning is also a beauty: 10ft SSE swell, glassy conditions, clean. Still big, still for experienced surfers only. The point at Asakawa will really show its magic during this stretch – that long period groundswell will wrap in nicely, but it can make the waves a bit straight at certain spots, so pick your peak.

So, to sum it up: don’t bother paddling out until the second week of September. The first week is a write-off. The 8th and 9th of September are your prime days – big, clean, and for the brave. After that, it tapers off into smaller, more manageable stuff with lighter winds, but nothing that will blow you away.

Rusty

Short Range Forecast

Light rain (total 6mm), mostly falling on Fri afternoon. Warm (max 31°C on Wed morning, min 26°C on Wed night). Wind will be generally light.

Days 4-6 Weather Summary

Heavy rain (total 46mm), heaviest during Mon night. Warm (max 30°C on Sun morning, min 26°C on Sat night). Wind will be generally light.

Wednesday
26
Thursday
27
Friday
28
Saturday
29
Sunday
30
Monday
31
Tuesday
1
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
2
0
1
0
0
0
0
0
1
1
0
1
1
0
0
0
0
0
0
0
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
2
S
11
1.6
S
11
1.2
SSW
11
1.1
SSE
9
1
SSE
10
1.1
S
9
0.9
SSW
8
0.9
SSW
8
0.8
S
7
0.9
SSW
7
0.9
SSW
7
1
SSW
7
0.8
SSW
6
0.7
S
7
0.4
S
12
0.7
S
10
0.6
S
10
0.6
S
12
0.9
S
13
1.4
S
15
2.3
S
16
Wave Graph
Metric surfscale
Energy kJ
1006
640
308
180
179
198
116
94
69
97
94
108
45
52
46
98
67
102
276
835
2576
Wind (km/h)
10
SSW
20
SSW
10
SW
15
SW
20
SSW
15
SW
10
SW
10
SW
5
W
0
ESE
10
SSW
10
W
0
SSE
10
SSW
10
SW
5
SSE
10
SE
15
E
20
SE
20
SE
30
SSE
Wind State
cross-on
cross-on
cross
cross-on
cross-on
cross
cross-on
cross-on
cross-off
glassy
cross-on
cross-off
glassy
cross-on
cross
on
cross-on
cross-on
cross-on
on
on
High Tide
5:47PM1.67m
4:59AM1.70m
6:08PM1.73m
5:36AM1.78m
6:30PM1.78m
6:12AM1.83m
6:52PM1.81m
6:48AM1.84m
7:14PM1.82m
7:26AM1.80m
7:38PM1.81m
8:07AM1.73m
8:03PM1.78m
Low Tide
11:05AM0.27m
11:22PM0.84m
11:35AM0.21m
11:50PM0.72m
12:05PM0.20m
00:18AM0.60m
12:33PM0.23m
00:48AM0.49m
1:02PM0.31m
1:19AM0.40m
1:31PM0.43m
1:53AM0.35m
2:01PM0.58m
2:31AM0.33m
part cloud
part cloud
clear
part cloud
part cloud
part cloud
rain showers
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
rain showers
thunderstorm
thunderstorm
clear
rain showers
thunderstorm
thunderstorm
thunderstorm
thunderstorm
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:31
5:31
5:31
5:33
5:33
5:35
5:35
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:37
6:35
6:34
6:32
6:30
6:30
6:29
 mm
1
4
1
2
9
5
1
4
4
1
20
18
11
21
Temp °C
31
31
27
31
31
27
30
29
26
29
29
27
30
29
27
29
29
27
27
27
27
Feels °C
33
33
31
33
33
31
34
34
31
34
34
32
35
34
32
31
32
30
30
30
28
  • 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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