Asakawa Surf Break

Lat Long: 33.63° N 134.38° E

Asakawa Surf Forecast and Surf Report

Issued: 8 am 09 Sep 2026 (local time)

Forecast update in  hr  min

Today's Asakawa sea temperature is
28.2°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 9 Sep 2026:

  • Best quality surf: Sunday 13 Sep, 9PM (local time) - 4ft (1.2m), 9s period, SE swell with glassy winds.
  • Most powerful swell: Monday 14 Sep, 12PM (local time) - 4.5ft (1.3m), 9s period, ESE swell with 287 kJ wave energy.
  • Next surfable swell (1★+): Thursday 10 Sep, 12PM (local time) - 3.5ft (1.0m), 8s period with SSE 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 Thursday (Sep 10) at 12PM. The primary swell is predicted to be 1.0m and 8s period with a secondary swell of 0.1m and 16s. 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 1.3m 9s and forecast to arrive on Monday (Sep 14) at 12PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.3m 5s period and expected on Wednesday (Sep 09) at 6PM.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+)12PM (Thu 10th Sep)3.5ft (1.0m) 8s
Best Surf 9PM (Sun 13th Sep)4ft (1.2m) 9s
Most Powerful12PM (Mon 14th Sep)4.5ft (1.3m) 9s

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


The Lowdown

Alright, listen up. For the first week and a bit, Asakawa is basically a dud. Swell is tiny, the period is short, and the wind is mostly a pain. You’re looking at a solid 9-day gap of nothing worth paddling for. But hold on, because the second half is a whole different story.

Starting Wednesday the 9th, there’s a 10ft south swell, but a 12 mph cross-shore from the southwest is going to chop it to pieces. Plenty of energy (1581), but the wind ruins it.

Thursday the 10th is a step down, with 3ft to 6ft SSE swell, but the wind is better from the NNE. It’s clean, but the energy is low (141 to 456) and the period is a short 8 seconds. Surfable, but that’s about it.

Friday the 11th gives us a brief moment of glassy conditions on the morning with a 3ft SSE swell. The wind is a light 3 mph from the ENE, making it nearly glassy. The energy is weak at 123, but it’s the cleanest wave we’ve seen. Small, but the best of the early period.

From Saturday the 12th through to Tuesday the 16th, it’s a whole lot of nothing. Swell drops below 3ft, wind is all over the place, and the water temp is a warm 83°F, about 2°F warmer than normal. Nothing to get excited about.

Then, on Wednesday the 18th, we see a glimmer. A 2ft swell from the southeast, but with a very long 18-second period. That’s a groundswell, and it’s clean with glassy conditions. The energy is moderate at 339. By the afternoon, the swell bumps to 4ft with a 16-second period, and the energy jumps to 761. This is where it starts to build.

Now, the real standout. The weekend of the 19th and 20th is where you want to be in the water. Saturday the 19th brings a 8ft to 7ft SSE swell with a very long 16 to 17-second period. The wind is light and variable, from the NNE and ENE, leaving it glassy early and clean throughout. The energy is massive, hitting 4441 and 4065. This is excellent surf for experienced surfers, but not a beginner wave. The swell direction is from the SSE, which is a great match for the point. Crowds are “sometimes” an issue, so expect a few others.

Sunday the 20th is even bigger. We’re looking at 10ft from the S and SSE, with a 16-second period. The wind is onshore from the SE in the morning, but by the afternoon it turns glassy from the NE. The energy is over 4500. This is a solid, powerful swell. With a period over 15 seconds, this groundswell will be breaking a bit straight at the beach, but at a point break like Asakawa, it’s going to be a treat.

Monday the 21st is the peak, with 13ft to 15ft from the south, with a 17-second period. The wind is a cross-off from the NNE to NE, keeping it clean. The energy is an incredible 10,394 to 12,081. This is for experts only. Too big for anyone else.

Tuesday the 22nd is a write-off. A gale force wind from the SE at 40 mph and then 47 mph from the south absolutely destroys the 15ft swell. It’s dangerous and blown out.

Wednesday the 23rd is a monster. 26ft from the SSW with a 17-second period. The wind is glassy from the west in the morning, but the swell is simply too big for this break. The energy is 51,977. It’s a spectacle, not a surf session.

Finally, Thursday the 24th, the swell drops rapidly to 4ft from the south with a 10-second period, and glassy conditions return. The energy is back to 311. A clean, manageable wave to finish the run.

So, the best bet is the weekend of the 19th and 20th. That’s the clear winner. The glassy conditions and the long period groundswell from the SSE are a perfect match for the point. If you’re an expert, Monday the 21st is also a killer session, but expect a few more heads out.

Rusty.

Short Range Forecast

Heavy rain (total 37mm), heaviest during Wed morning. Warm (max 27°C on Wed morning, min 21°C on Wed night). Wind will be generally light.

Days 4-6 Weather Summary

Heavy rain (total 81mm), heaviest during Mon night. Warm (max 28°C on Sun afternoon, min 24°C on Mon night). Wind will be generally light.

Wednesday
9
Thursday
10
Friday
11
Saturday
12
Sunday
13
Monday
14
Tuesday
15
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
1
0
0
1
1
1
0
1
1
0
1
0
0
1
0
0
0
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)
3
S
9
1.8
SSE
8
1.2
SSE
8
1
SSE
8
1
SSE
8
1
SSE
8
0.9
SSE
8
1.1
SSE
8
0.9
SSE
7
0.7
SSE
7
0.4
SE
10
0.4
ESE
10
0.3
E
13
0.6
ESE
9
1.2
ESE
9
1.1
SE
9
1.1
SE
9
1.2
ESE
9
1.2
ESE
9
1
ESE
9
1
SE
9
Wave Graph
Metric surfscale
Energy kJ
1575
450
202
136
123
120
101
138
94
51
25
35
31
55
211
174
203
221
207
161
155
Wind (km/h)
20
SW
20
NNE
25
N
20
NNE
10
NE
5
NNE
5
ENE
10
ENE
5
NNE
5
NE
5
SE
5
ESE
5
ESE
10
SSE
5
SE
5
SSE
10
SSE
10
SE
5
SW
5
SW
5
N
Wind State
cross
cross-off
cross-off
cross-off
cross-off
glassy
glassy
cross
cross-off
cross-off
glassy
glassy
cross-on
on
glassy
on
on
cross-on
glassy
cross
off
High Tide
5:21PM1.76m
4:49AM1.79m
5:47PM1.81m
5:34AM1.87m
6:13PM1.84m
6:15AM1.89m
6:37PM1.84m
6:54AM1.85m
7:00PM1.83m
7:31AM1.78m
7:22PM1.79m
8:09AM1.67m
7:43PM1.73m
Low Tide
10:41AM0.18m
11:04PM0.73m
11:20AM0.16m
11:38PM0.57m
11:55AM0.21m
00:11AM0.43m
12:27PM0.30m
00:43AM0.33m
12:57PM0.43m
1:15AM0.29m
1:24PM0.57m
1:46AM0.29m
1:50PM0.72m
2:19AM0.34m
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<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:41
5:41
5:41
5:43
5:43
5:43
5:45
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:17
6:16
6:15
6:14
6:13
6:10
6:09
 mm
30
1
2
1
1
2
4
7
7
3
2
4
1
3
50
14
26
1
Temp °C
27
24
22
25
24
23
26
26
25
26
25
25
27
28
25
27
27
25
24
24
23
Feels °C
31
24
20
25
25
27
30
30
29
31
30
30
31
31
29
31
31
29
29
28
26
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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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