Asakawa Surf Break

Lat Long: 33.63° N 134.38° E

Asakawa Surf Forecast and Surf Report

Issued: 8 pm 28 Jul 2026 (local time)

Forecast update in  hr  min

Today's Asakawa sea temperature is
28.3° C
1.0° 

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


Asakawa surf forecast from 28 Jul 2026:

  • Best quality surf: Wednesday 5 Aug, 12AM (local time) - 11ft (3.5m), 18s period, ESE swell with glassy winds.
  • Most powerful swell: Wednesday 5 Aug, 3AM (local time) - 13ft (4.0m), 18s period, ESE swell with 9,098 kJ wave energy.
  • Next surfable swell (1★+): Wednesday 29 Jul, 3AM (local time) - 1.5ft (0.5m), 10s period with SE 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 (Jul 29) at 3AM. The primary swell is predicted to be 0.5m and 10s period with a secondary swell of 0.7m and 6s. 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 18s and forecast to arrive on Wednesday (Aug 05) at 3AM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.3m 2s period and expected on Friday (Jul 31) at 6AM.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+) 3AM (Wed 29th Jul)1.5ft (0.5m) 10s
Best Surf12AM (Wed 5th Aug)11ft (3.5m) 18s
Most Powerful 3AM (Wed 5th Aug)13ft (4.0m) 18s

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


The Lowdown

Alright folks, Rusty here. Let’s have a look at what’s on the cards for the local stretch.

To be straight with you, the first few days are a bit of a write-off. We’re looking at a gap from the start all the way through to the morning of Monday the 3rd of August where the surf is just too weak or the conditions are too messy to bother. You’ll be staring at flat, weak lines with practically no energy (84) and onshore junk. Don’t even bother until we get past that.

The first real window of interest kicks off on Tuesday the 4th of August. Asakawa (point break) is the standout here. Early morning we’ve got a solid 8ft swell from the ESE, with a very long period of 18 seconds – that’s proper groundswell energy. The wave energy is pumping through at 4480 (strong), and the wind is glassy. That’s clean, lined-up surf. This is a point break, so that long period will wrap in beautifully. For experienced surfers, this is the best on offer. The water temperature is about average for this time of year, no surprises.

That Tuesday afternoon gets a bit bumpy with a cross-onshore wind, so the morning is the clear target.

Now, Wednesday the 5th of August sees the swell jump up to 15ft in the morning and 18ft in the afternoon, still from the ESE with another 18 second period. Energy is huge (12544 to 18198). The wind is cross-offshore and clean. But let’s be real, this is big, powerful stuff – over 8ft. This is strictly for experts only. The wave quality is there, but it’s not for the faint of heart.

Thursday the 6th of August is just monstrous. We’re talking 26ft to 30ft swell with insane energy (38983 to 46676). The wind is solid cross-off, but this is too big for paddle surfing unless you’re a charger on a big gun. Honestly, this setup looks more interesting for kite surfing than paddle surfing. The swell is predicted to be too big for this break.

Friday the 7th of August takes a turn for the worse. The wind goes cross-on and strong, the swell is still huge at 28ft to 38ft, but it’s all blown out and messy. Skip it.

Conditions settle through the weekend, but the swell drops and the wind stays onshore. Not much to report until Monday the 10th of August. Afternoon at Asakawa sees a drop to 3ft from the east with a 13-second period, glassy conditions, and energy at 390 (moderate). It’s small but clean. That’s a nice little session if you’re on a log.

Tuesday the 11th of August morning is worth a mention: 4ft from the ESE, but the period is a short 6 seconds. Glassy though. The energy is moderate (339). Fun for a grovel, but not a standout.

The best bet in the second week looks like Wednesday the 12th of August. Morning session at Asakawa with a 5ft ESE swell, 8-second period, and a clean cross-off wind. Energy is moderate (520). It’s a nice, clean, manageable wave. Not a monster, but fun. The afternoon stays glassy at 5ft. Good for a longboard.

Looking further out, Thursday the 13th of August morning has potential: 6ft from the ESE, 9-second period, glassy. Energy is approaching strong (993). That’s a promising forecast, but it’s a fair way out, so keep an eye on it.

So, the real standout is Tuesday the 4th of August morning at Asakawa for the experienced crew, and Wednesday the 12th of August for a cleaner, more manageable session. The rest is either flat, blown out, or too big.

Rusty, signing off.

Short Range Forecast

Light rain (total 4mm), mostly falling on Tue night. Warm (max 33°C on Thu morning, min 27°C on Tue night). Wind will be generally light.

Days 5-7 Weather Summary

Light rain (total 8mm), mostly falling on Sun afternoon. Warm (max 33°C on Sat morning, min 27°C on Fri night). Wind will be generally light.

Wednesday
29
Thursday
30
Friday
31
Saturday
1
Sunday
2
Monday
3
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
1
1
1
1
0
0
0
0
0
0
0
0
1
0
1
2
2
3
3
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.5
SE
10
0.5
SE
10
0.5
SE
10
0.5
SE
10
0.4
SE
10
0.4
SE
10
0.4
SE
10
0.4
SE
9
0.4
SE
9
0.3
SE
11
0.4
SE
10
0.4
SE
11
0.3
ESE
15
0.5
ESE
16
0.9
ESE
16
1.2
ESE
15
1.5
ESE
16
1.8
ESE
17
2.2
ESE
18
Wave Graph
Metric surfscale
Energy kJ
48
48
48
47
23
23
23
24
23
20
28
29
42
147
382
619
1194
1792
2888
Wind (km/h)
5
NNW
5
WSW
0
S
5
WNW
5
ESE
10
SE
5
NW
5
ENE
5
E
5
NW
5
ENE
5
SE
0
NNW
5
E
10
SE
5
ESE
10
ESE
10
SE
5
SSE
Wind State
glassy
glassy
glassy
cross-off
glassy
cross-on
off
glassy
cross-on
glassy
glassy
glassy
glassy
cross-on
on
glassy
cross-on
on
on
High Tide
5:10AM1.68m
6:46PM1.68m
5:48AM1.74m
7:11PM1.71m
6:24AM1.77m
7:36PM1.73m
7:00AM1.77m
8:00PM1.74m
7:37AM1.73m
8:25PM1.74m
8:17AM1.67m
8:51PM1.72m
Low Tide
11:43PM0.96m
12:00PM0.17m
00:13AM0.89m
12:32PM0.15m
00:44AM0.81m
1:02PM0.16m
1:15AM0.74m
1:31PM0.21m
1:47AM0.67m
2:00PM0.31m
2:22AM0.61m
2:31PM0.44m
rain showers
thunderstorm
thunderstorm
part cloud
part cloud
clear
clear
clear
part cloud
clear
clear
clear
clear
part cloud
thunderstorm
thunderstorm
thunderstorm
thunderstorm
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:11
5:11
5:13
5:13
5:13
5:15
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:06
7:05
7:04
7:04
7:02
7:01
7:00
 mm
1
2
1
3
2
2
1
Temp °C
29
31
30
29
33
33
29
33
33
29
33
32
29
31
30
27
29
28
27
Feels °C
33
35
35
33
36
37
33
36
36
33
36
36
34
35
34
33
34
32
32
  • Map Icons:
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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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