Katahama Surf Break

Lat Long: 34.72° N 138.22° E

Katahama 48 hour detailed Surf Forecast

Issued: 2 pm 22 Sep 2026 (local time)

Forecast update in  hr  min

Today's Katahama sea temperature is
24.7°C
1.3° 

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


How big are the waves at Katahama today (22 Sep):

  • Afternoon surf: Afternoon surf (22 Sep, local time) - 3ft (0.9m), 8s period with SSE swell.
  • Evening surf: Evening surf (22 Sep, local time) - 2.5ft (0.8m), 8s period with SSE swell.

The current surf forecast for Katahama at 10PM is: 0.8m 8s primary swell from a South-southeast direction and 0.8m 4s secondary swell from a East direction (forecast issued at 02:00pm September 22). An open ocean swell of 0.3m 4s is not directed at the surf break. The wind direction is predicted to be cross-shore.

Time (JST) & DateWave HeightWave Period
Morning (22 Sep)--
Afternoon (22 Sep)3ft (0.9m)8s
Evening (22 Sep)2.5ft (0.8m)8s

Table - waves today at Katahama. (Swell directed towards the surf break)


Short Range Forecast

Some drizzle, heaviest during Thu night. Warm (max 29°C on Tue afternoon, min 22°C on Wed night). Wind will be generally light.

Tue
22
Wednesday
23
Thursday
24
12 PM
3 PM
6 PM
9 PM
12 AM
3 AM
6 AM
9 AM
12 PM
3 PM
6 PM
9 PM
12 AM
3 AM
6 AM
9 AM
12 PM
3 PM
6 PM
9 PM
Rating
(10 max)
0
0
0
0
0
0
0
0
0
0
0
0
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
Height Map
Wave
Height (m)
Direction
Period (s)
1
SSE
9
0.9
SSE
8
0.9
SSE
8
0.8
SSE
8
0.7
SSE
8
0.6
SSE
7
0.6
S
7
1.2
E
5
1.4
ENE
6
1.4
ENE
6
1.2
E
6
1.1
E
5
0.8
E
6
0.7
E
6
0.6
E
6
0.5
E
6
0.5
E
6
0.4
ESE
6
0.4
ESE
6
0.3
ESE
5
Wave Graph
Metric surfscale
Energy kJ
141
108
94
79
58
43
38
67
122
126
88
70
39
39
23
17
17
10
10
6
Wind (km/h)
10
E
10
NE
15
E
25
NE
20
ENE
25
NE
25
NE
25
NE
25
NE
25
NE
20
NE
20
NE
15
NE
10
NE
5
NNW
5
SW
15
SSW
10
S
10
ESE
10
NE
Wind State
cross-on
cross
cross-on
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
glassy
cross
cross-on
cross-on
cross-on
cross
High Tide
4:00PM1.58m
3:16AM1.47m
4:22PM1.63m
3:59AM1.56m
4:41PM1.67m
Low Tide
9:08AM0.57m
10:02PM0.97m
9:51AM0.54m
10:27PM0.84m
10:25AM0.54m
clear
clear
part cloud
part cloud
cloud
part cloud
cloud
part cloud
part cloud
part cloud
part cloud
part cloud
cloud
clear
part cloud
clear
part cloud
clear
part cloud
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:35
5:35
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:45
5:44
5:42
 mm
Temp °C
28
29
26
26
25
24
23
23
24
24
23
22
23
23
23
24
25
26
25
24
Feels °C
30
31
28
25
24
24
22
21
22
22
22
21
24
25
26
26
26
27
28
27
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
Map placeholder
How to use the Wavefinder 

FREE! Surf-Forecast.com widget for your website

The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Katahama surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.


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