Katahama Surf Break

Lat Long: 34.72° N 138.22° E

Katahama 48 hour detailed Surf Forecast

Issued: 8 pm 29 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) - 1ft (0.3m), 11s period with E swell.

The current surf forecast for Katahama at 1AM is: 0.4m 11s primary swell from a East direction and 0.4m 4s secondary swell from a East-northeast direction (forecast issued at 08:00pm August 29). An open ocean swell of 1.4m 6s 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)1ft (0.3m)11s

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


Short Range Forecast

Light rain (total 7mm), mostly falling on Sat night. Warm (max 28°C on Mon morning, min 24°C on Sat night). Wind will be generally light.

Sat
29
Sunday
30
Monday
31
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
Swell
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
0.4
E
11
0.4
E
11
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
0.3
E
11
0.3
SE
10
0.1
E
5
0.3
E
2
0.6
E
3
0.3
ESE
14
0.4
ESE
14
0.4
ESE
14
Wave Graph
Metric surfscale
Energy kJ
41
39
38
38
21
22
22
22
22
22
21
16
1
1
7
38
64
74
Wind (km/h)
10
WSW
5
NNW
10
NE
10
E
10
ESE
10
E
5
ESE
10
SSE
5
SSE
5
ESE
10
ENE
5
ENE
10
ENE
10
ENE
15
E
10
ESE
10
ESE
10
NE
Wind State
cross-off
cross-off
cross
cross-on
cross-on
cross-on
cross-on
on
cross-on
cross-on
cross
cross
cross
cross
cross-on
on
cross-on
cross
High Tide
6:23PM1.76m
6:28AM1.72m
6:48PM1.79m
7:07AM1.67m
7:15PM1.79m
Low Tide
00:33AM0.59m
12:38PM0.51m
1:06AM0.53m
1:07PM0.61m
thunderstorm
thunderstorm
rain showers
part cloud
cloud
cloud
cloud
part cloud
part cloud
cloud
cloud
part cloud
part cloud
part cloud
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:16
5:18
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:17
6:16
6:15
 mm
1
5
2
Temp °C
27
26
25
24
24
24
25
25
25
25
25
25
25
26
28
28
27
27
Feels °C
31
31
29
27
27
27
28
28
29
29
29
29
28
29
31
31
30
30
  • 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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