Katahama Surf Break

Lat Long: 34.72° N 138.22° E

Katahama 48 hour detailed Surf Forecast

Issued: 2 am 22 Aug 2026 (local time)

Forecast update in  hr  min

Today's Katahama sea temperature is
26.8° C
0.8° 

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 Aug):

  • Morning surf: Morning surf (22 Aug, local time) - 1.5ft (0.5m), 10s period with E swell.
  • Afternoon surf: Afternoon surf (22 Aug, local time) - 2ft (0.6m), 10s period with E swell.
  • Evening surf: Evening surf (22 Aug, local time) - 2.5ft (0.7m), 11s period with E swell.

The current surf forecast for Katahama at 6AM is: 0.5m 10s primary swell from a East direction (forecast issued at 02:00am August 22). An open ocean swell of 0.9m 9s is not directed at the surf break. The wind direction is predicted to be cross-offshore.

Time (JST) & DateWave HeightWave Period
Morning (22 Aug)1.5ft (0.5m)10s
Afternoon (22 Aug)2ft (0.6m)10s
Evening (22 Aug)2.5ft (0.7m)11s

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


Short Range Forecast

Light rain (total 6mm), mostly falling on Sat night. Warm (max 28°C on Sat morning, min 25°C on Sun night). Wind will be generally light.

Saturday
22
Sunday
23
Monday
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
1
1
1
0
0
0
0
1
1
1
0
0
0
0
1
2
2
3
4
2
3
3
4
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)
0.4
ESE
9
0.4
SE
11
0.4
SE
13
0.4
SE
14
0.4
SE
13
0.6
E
10
0.7
E
11
0.7
E
11
0.7
E
11
0.6
E
10
0.5
E
10
0.6
E
10
0.4
E
10
0.4
SE
13
0.5
SE
12
0.6
SSE
12
0.6
SSE
13
0.6
SSE
18
0.9
SSE
18
1.5
SSE
17
1.8
SSE
16
2.1
SSE
15
2.3
SSE
16
2.4
SSE
16
Wave Graph
Metric surfscale
Energy kJ
29
31
49
49
47
73
112
112
108
71
47
71
31
47
73
98
108
218
572
1265
1692
2116
2682
2787
Wind (km/h)
5
SW
5
WSW
5
W
10
WSW
20
SSW
15
SSW
10
SSW
5
SW
5
WSW
5
WNW
0
NNW
5
E
15
SSE
10
SSE
10
SE
5
SSE
5
N
0
WNW
0
N
5
SE
10
S
15
SSW
15
SW
10
WSW
Wind State
cross-off
cross-off
cross-off
cross-off
cross
cross
cross
cross
glassy
glassy
glassy
cross-on
on
on
on
glassy
glassy
glassy
glassy
glassy
cross-on
cross
cross
cross-off
High Tide
10:40PM1.45m
3:42PM1.37m
00:41AM1.39m
4:19PM1.48m
2:17AM1.43m
4:45PM1.55m
Low Tide
7:17AM0.62m
7:59PM1.28m
8:42AM0.55m
9:44PM1.21m
9:38AM0.47m
clear
clear
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
thunderstorm
part cloud
clear
part cloud
part cloud
thunderstorm
thunderstorm
thunderstorm
thunderstorm
clear
clear
clear
part cloud
thunderstorm
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:11
5:11
5:13
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:27
6:25
6:24
 mm
1
1
1
1
1
1
Temp °C
26
26
26
28
28
28
27
27
26
26
26
27
26
26
26
26
26
25
25
27
27
28
27
26
Feels °C
30
30
30
31
30
30
30
32
30
31
31
31
28
30
30
31
31
30
30
32
30
31
30
29
  • 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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