Katahama Surf Break

Lat Long: 34.72° N 138.22° E

Katahama 48 hour detailed Surf Forecast

Issued: 2 am 22 Jul 2026 (local time)

Forecast update in  hr  min

Today's Katahama sea temperature is
26.3° C
0.2° 

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 Jul):

  • Morning surf: Morning surf (22 Jul, local time) - 2.5ft (0.8m), 5s period with SW swell.
  • Afternoon surf: Afternoon surf (22 Jul, local time) - 3.5ft (1.1m), 5s period with SW swell.
  • Evening surf: Evening surf (22 Jul, local time) - 1.5ft (0.5m), 10s period with E swell.

The current surf forecast for Katahama at 10AM is: 0.8m 5s primary swell from a Southwest direction and 0.2m 11s secondary swell from a East-southeast direction (forecast issued at 02:00am July 22). An open ocean swell of 0.5m 10s is not directed at the surf break. The wind direction is predicted to be cross-shore.

Time (JST) & DateWave HeightWave Period
Morning (22 Jul)2.5ft (0.8m)5s
Afternoon (22 Jul)3.5ft (1.1m)5s
Evening (22 Jul)1.5ft (0.5m)10s

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


Short Range Forecast

Mostly dry. Warm (max 31°C on Wed morning, min 27°C on Wed night). Wind will be generally light.

Wednesday
22
Thursday
23
Friday
24
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
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
1
1
1
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
Height Map
Wave
Height (m)
Direction
Period (s)
0.6
SW
4
0.6
SW
4
0.7
SW
5
0.8
SW
5
0.8
SW
5
1.1
SW
5
1.4
SW
5
0.5
E
10
0.5
E
10
0.5
E
10
0.4
E
10
0.4
E
10
0.4
E
10
0.4
E
10
0.4
E
10
0.4
E
10
0.4
E
9
0.4
E
9
0.4
E
9
0.4
E
9
0.3
E
9
0.3
SE
11
0.4
SE
11
0.4
SE
11
Wave Graph
Metric surfscale
Energy kJ
15
16
23
35
37
60
106
51
50
50
31
31
31
30
30
29
28
27
27
27
15
18
30
30
Wind (km/h)
10
WSW
10
WSW
10
WSW
10
SW
15
SSW
25
SW
20
WSW
15
WSW
10
WSW
5
NW
5
N
5
SE
10
SSE
15
S
10
SSW
5
S
5
ENE
10
ENE
10
ENE
10
E
20
SE
15
SSE
10
SSE
5
SSE
Wind State
cross-off
cross-off
cross-off
cross
cross-on
cross
cross-off
cross-off
cross-off
off
glassy
glassy
cross-on
cross-on
cross
glassy
cross-on
cross
cross
cross-on
on
on
on
glassy
High Tide
10:04PM1.58m
11:23AM1.19m
10:54PM1.52m
1:49PM1.20m
11:58PM1.48m
3:37PM1.30m
Low Tide
5:12AM0.68m
4:21PM0.95m
6:32AM0.63m
5:31PM1.11m
7:55AM0.56m
7:29PM1.21m
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
4:48
4:48
4:50
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:57
6:55
6:55
 mm
Temp °C
28
27
27
29
31
31
30
28
27
27
27
30
31
31
30
29
28
27
27
29
29
29
28
28
Feels °C
33
32
32
34
35
33
32
32
31
32
32
36
34
33
34
35
34
31
32
33
32
33
33
34
  • 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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