Katahama Surf Break

Lat Long: 34.72° N 138.22° E

Katahama 48 hour detailed Surf Forecast

Issued: 8 pm 21 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) - 0.5ft (0.2m), 11s period with ESE 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) - 0.5ft (0.1m), 11s period with SE swell.

The current surf forecast for Katahama at 5AM is: 0.7m 5s primary swell from a Southwest direction and 0.2m 11s secondary swell from a East-southeast direction (forecast issued at 08:00pm July 21). An open ocean swell of 0.5m 10s is not directed at the surf break. The wind direction is predicted to be cross-offshore.

Time (JST) & DateWave HeightWave Period
Morning (22 Jul)0.5ft (0.2m)11s
Afternoon (22 Jul)3.5ft (1.1m)5s
Evening (22 Jul)0.5ft (0.1m)11s

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


Short Range Forecast

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

Tue
21
Wednesday
22
Thursday
23
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
1
1
0
0
0
0
0
0
Swell
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
0.6
SW
4
0.6
SW
4
0.7
SW
5
0.2
ESE
11
0.8
SW
5
1.1
SW
5
0.1
SE
11
0.1
SE
11
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
Wave Graph
Metric surfscale
Energy kJ
12
14
15
16
22
11
35
55
4
5
50
50
31
31
31
30
30
29
Wind (km/h)
15
SW
10
WSW
10
WSW
10
WSW
5
WSW
5
SSW
15
S
20
SW
25
WSW
15
WSW
10
WSW
5
NW
5
N
5
SE
10
S
15
SSW
15
SW
5
S
Wind State
cross
cross-off
cross-off
cross-off
cross-off
glassy
cross-on
cross
cross-off
cross-off
cross-off
glassy
glassy
glassy
cross-on
cross-on
cross
glassy
High Tide
10:04PM1.58m
11:23AM1.19m
10:54PM1.52m
1:49PM1.20m
Low Tide
3:33PM0.78m
5:12AM0.68m
4:21PM0.95m
6:32AM0.63m
5:31PM1.11m
thunderstorm
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
4:48
4:48
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:58
6:57
6:55
 mm
1
Temp °C
29
28
28
27
27
29
30
31
30
28
27
27
27
29
31
31
30
28
Feels °C
33
32
33
32
33
35
34
33
32
32
31
33
32
34
34
33
34
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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