Katahama Surf Break

Lat Long: 34.72° N 138.22° E

Katahama 48 hour detailed Surf Forecast

Issued: 2 pm 30 Aug 2026 (local time)

Forecast update in  hr  min

Today's Katahama sea temperature is
27.6°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):

  • Afternoon surf: Afternoon surf (30 Aug, local time) - 1ft (0.3m), 4s 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 10PM is: 0.4m 11s primary swell from a East direction and 0.2m 5s secondary swell from a East direction (forecast issued at 02:00pm August 30). An open ocean swell of 0.5m 7s is not directed at the surf break, a second open ocean swell of 0.5m 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)--
Afternoon (30 Aug)1ft (0.3m)4s
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 Wed morning, min 24°C on Tue night). Wind will be generally light.

Sun
30
Monday
31
Tuesday
1
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
1
0
0
1
1
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.3
E
11
0.3
E
4
0.3
E
11
0.4
E
11
0.5
S
7
0.2
ENE
2
0.3
ENE
5
0.2
E
5
0.4
ESE
3
0.4
ESE
3
0.4
ESE
14
0.4
ESE
14
0.6
E
13
0.7
E
13
0.7
ESE
13
0.8
ESE
12
0.8
ESE
12
0.8
ESE
12
0.8
E
12
0.8
E
11
Wave Graph
Metric surfscale
Energy kJ
22
2
22
39
0
1
5
2
2
3
64
74
130
168
165
205
192
186
177
157
Wind (km/h)
10
ESE
10
SSE
10
SE
10
E
5
NE
5
ENE
5
ENE
10
E
10
SE
15
SE
15
SE
15
ESE
10
ESE
10
ENE
10
NE
10
E
15
SSE
15
SSE
10
S
0
SSE
Wind State
on
cross-on
on
cross-on
cross
cross
cross-on
cross-on
on
on
on
on
cross-on
cross
cross
cross-on
on
cross-on
cross-on
glassy
High Tide
6:48PM1.79m
7:07AM1.67m
7:15PM1.79m
7:49AM1.59m
7:45PM1.75m
Low Tide
12:38PM0.51m
1:06AM0.53m
1:07PM0.61m
1:43AM0.50m
1:37PM0.73m
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
clear
part cloud
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:18
5:18
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:16
6:15
6:14
 mm
Temp °C
24
25
25
25
25
25
25
27
27
27
26
26
26
25
25
26
27
27
26
26
Feels °C
27
27
28
29
29
29
29
30
29
29
29
29
30
29
28
29
29
29
29
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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