Asakawa Surf Break

Lat Long: 33.63° N 134.38° E

Asakawa Surf Forecast and Surf Report

Issued: 8 pm 25 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 25 Aug 2026:

  • Best quality surf: Wednesday 26 Aug, 6AM (local time) - 6.5ft (2.0m), 12s period, S swell with glassy winds.
  • Most powerful swell: Wednesday 2 Sep, 12AM (local time) - 13ft (4.0m), 14s period, S swell with 5,690 kJ wave energy.
  • Next surfable swell (1★+): Wednesday 26 Aug, 6AM (local time) - 6.5ft (2.0m), 12s 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 Wednesday (Aug 26) at 6AM. The primary swell is predicted to be 2.0m and 12s period with a secondary swell of 0.9m and 10s. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Asakawa in the next 16 days are 4.0m 14s and forecast to arrive on Wednesday (Sep 02) at 12AM. Winds are predicted to be onshore at the time the swell arrives.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+) 6AM (Wed 26th Aug)6.5ft (2.0m) 12s
Best Surf 6AM (Wed 26th Aug)6.5ft (2.0m) 12s
Most Powerful12AM (Wed 2nd Sep)13ft (4.0m) 14s

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


The Lowdown

G'day, I'm Rusty, and I've got the goods on what's happening with the surf around here. The only break we're looking at is Asakawa, a point break that's a bit of a fickle beast—it's inconsistent, so you've gotta be patient. The water temp is sitting at 84°, which is a touch warmer than average for this time of year, so you'll be sweet in just boardshorts.

The first week is a bit of a write-off, to be honest. We've got a fair bit of energy kicking around, but the wind's just not playing ball. Tuesday the 25th of August has some size with a 8ft swell from the SSE, and the combined energy is pumping at 3331, but it's onshore and the quality is marginal. Not one to get excited about. Wednesday the 26th and Thursday the 27th are all cross-onshore winds and choppy conditions, with the swell dropping and the energy falling into the moderate range (around 783 to 388). Forget about it.

Then there's a bit of a reprieve. Friday the 28th morning, the wind goes glassy, and we've got a 4ft SSW swell with a short 8-second period. The energy is moderate at 407, and it's rated as "expect good surf conditions." That's your best chance for a clean, if small, session. Saturday the 29th and Sunday the 30th mornings are also glassy, but the swell is tiny—down to 3ft and 3ft, with weak energy around 155 and 102. It's surfable, but you'll be working for it.

The start of September brings a pulse of proper swell. On the 1st of September, we see a 5ft SSE groundswell with a very long 15-second period, and the energy jumps to 1064. But the wind is cross-onshore, so it's messy. The 2nd and 3rd of September have even more size—7ft to 8ft—and energy in the strong range (1444 to 2861), but the wind stays onshore or cross-onshore, and the conditions are poor. It's a tease.

The real standout, and the one to circle on your calendar, is Tuesday the 9th of September. The morning brings a 10ft swell from the east, with a combined energy of 2710. The wind is glassy calm, and the guidance says it's excellent for experienced surfers. That's a big swell, so it's for the crew who know what they're doing—but with clean conditions and a point break setup, it could be a day to remember. The wind is offshore (NNW is the optimum for Asakawa), and whilst the swell direction is a bit off, the quality is there. The afternoon before, on the 8th, also looks promising with a 7ft SE swell, glassy conditions, and "expect very good surf conditions," so that's a solid lead-in.

Overall, it's a slow start with a lot of dirty wind, but the second week has some real potential, especially around the 8th and 9th of September. Keep an eye on the forecast, 'cause things can change, but right now, that's the window.

Rusty.

Short Range Forecast

Light rain (total 7mm), mostly falling on Fri afternoon. Warm (max 31°C on Wed morning, min 26°C on Tue night). Wind will be generally light.

Days 5-7 Weather Summary

Heavy rain (total 32mm), heaviest during Sat night. Warm (max 30°C on Sat afternoon, min 25°C on Fri night). Wind will be generally light.

Wednesday
26
Thursday
27
Friday
28
Saturday
29
Sunday
30
Monday
31
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
3
1
0
1
1
0
1
0
0
1
1
0
1
1
0
0
0
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)
2.5
SSE
12
2
S
11
1.5
S
11
1.2
SSW
11
1.4
SSW
10
1.2
S
10
1
S
9
0.9
SSW
8
1.2
S
8
1.2
SSW
8
0.9
S
8
1.1
SSW
7
0.8
SSW
7
1.1
SW
5
0.4
SE
10
0.7
S
8
0.9
SSE
10
0.9
SSE
10
1.6
SSE
12
Wave Graph
Metric surfscale
Energy kJ
1961
1006
565
308
378
279
169
119
181
155
90
125
73
74
31
55
177
163
669
Wind (km/h)
10
WSW
10
SSW
20
SSW
10
WSW
15
SW
20
SSW
10
WSW
10
SW
10
SSW
5
W
5
SSW
10
SW
10
W
0
NE
10
SSW
10
SW
10
SSE
15
SE
10
ESE
Wind State
cross
cross-on
cross-on
cross
cross-on
cross-on
cross
cross-on
cross-on
glassy
glassy
cross-on
cross-off
glassy
cross-on
cross
on
on
cross-on
High Tide
4:20AM1.60m
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
Low Tide
10:55PM0.96m
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
clear
clear
part cloud
part cloud
part cloud
cloud
part cloud
rain showers
mod rain
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
clear
clear
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
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:37
6:37
6:35
6:34
6:32
6:30
6:30
 mm
1
6
9
1
5
10
2
4
1
19
Temp °C
27
31
31
27
31
31
27
30
29
26
29
30
27
30
29
27
30
29
26
Feels °C
32
34
33
31
33
33
31
34
33
31
33
35
32
35
34
32
33
32
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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