Katahama Surf Break

Lat Long: 34.72° N 138.22° E

Katahama 48 hour detailed Surf Forecast

Issued: 2 am 30 Aug 2026 (local time)

Forecast update in  hr  min

Today's Katahama sea temperature is
27.7°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 (30 Aug):

  • Morning surf: Morning surf (30 Aug, local time) - 1ft (0.3m), 11s period with E swell.
  • Afternoon surf: Afternoon surf (30 Aug, local time) - 1ft (0.3m), 11s period with E swell.
  • Evening surf: Evening surf (30 Aug, local time) - 1.5ft (0.4m), 11s period with E swell.

The current surf forecast for Katahama at 8AM is: 0.3m 11s primary swell from a East direction and 0.5m 4s secondary swell from a East direction (forecast issued at 02:00am August 30). An open ocean swell of 1.0m 6s is not directed at the surf break, a second open ocean swell of 0.4m 8s is not directed at the surf break. The wind direction is predicted to be cross-onshore.

Time (JST) & DateWave HeightWave Period
Morning (30 Aug)1ft (0.3m)11s
Afternoon (30 Aug)1ft (0.3m)11s
Evening (30 Aug)1.5ft (0.4m)11s

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


Short Range Forecast

Mostly dry. Warm (max 28°C on Tue morning, min 24°C on Sun morning). Wind will be generally light.

Sunday
30
Monday
31
Tuesday
1
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
0
0
0
0
0
0
0
0
0
1
1
0
0
0
0
0
1
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
E
11
0.3
E
11
0.3
E
11
0.3
E
11
0.3
E
11
0.3
E
11
0.3
E
11
0.4
E
11
0.2
ENE
6
0.2
ENE
5
0.3
ENE
5
0.3
E
5
0.4
E
4
0.3
ESE
14
0.4
ESE
14
0.4
ESE
14
0.6
E
13
0.7
E
13
0.7
ESE
13
0.7
ESE
12
0.8
ESE
12
0.8
ESE
12
0.8
ESE
12
0.8
E
11
Wave Graph
Metric surfscale
Energy kJ
38
21
21
22
22
22
22
39
3
3
5
4
5
38
64
74
130
168
165
160
192
186
186
157
Wind (km/h)
15
E
10
E
10
E
5
E
5
ESE
10
SSE
10
SSE
5
SSE
5
E
5
ENE
10
ENE
10
ENE
10
ESE
15
SSE
10
SE
5
SE
5
NE
5
NNE
10
NE
10
ENE
10
SSE
15
S
10
SSW
0
SW
Wind State
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
on
glassy
glassy
cross
cross-on
on
on
on
on
glassy
cross-off
cross
cross-on
cross-on
cross-on
cross-on
glassy
High Tide
6:28AM1.72m
6:48PM1.79m
7:07AM1.67m
7:15PM1.79m
7:49AM1.59m
7:45PM1.75m
Low Tide
00:33AM0.59m
12:38PM0.51m
1:06AM0.53m
1:07PM0.61m
1:43AM0.50m
1:37PM0.73m
rain showers
part cloud
cloud
part cloud
cloud
part cloud
part cloud
part cloud
cloud
part cloud
part cloud
part cloud
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>
5:16
5:18
5:18
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:16
6:15
6:14
 mm
2
Temp °C
24
23
23
24
25
25
25
25
25
25
25
26
27
27
26
26
26
25
25
27
28
28
27
26
Feels °C
26
25
26
27
28
28
28
29
30
29
29
29
30
29
29
31
31
29
29
31
31
31
31
31
  • 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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