Katahama Surf Break

Lat Long: 34.72° N 138.22° E

Katahama 48 hour detailed Surf Forecast

Issued: 8 pm 16 Sep 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 (17 Sep):

  • Evening surf: Evening surf (17 Sep, local time) - 1.5ft (0.5m), 12s period with E swell.

The current surf forecast for Katahama at 12AM is: 0.5m 12s primary swell from a East direction and 0.7m 8s secondary swell from a Southeast direction, 0.9m 4s secondary swell from a East-northeast direction (forecast issued at 08:00pm September 16). The wind direction is predicted to be cross-shore.

Time (JST) & DateWave HeightWave Period
Morning (17 Sep)--
Afternoon (17 Sep)--
Evening (17 Sep)1.5ft (0.5m)12s

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


Short Range Forecast

Heavy rain (total 28mm), heaviest during Wed night. Warm (max 27°C on Sat afternoon, min 20°C on Thu night). Mainly fresh winds.

Wed
16
Thursday
17
Friday
18
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
1
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)
0.9
ESE
8
0.5
E
12
0.5
E
12
1
E
8
1.1
E
7
1.3
E
7
1.4
E
7
1.7
E
7
2
E
7
0.1
S
9
1.9
E
7
1.8
E
8
1.7
E
8
0.3
E
12
0.3
E
12
0.3
E
11
0.2
SSE
11
0.4
SE
16
Wave Graph
Metric surfscale
Energy kJ
94
75
71
124
114
162
199
278
363
2
388
377
372
23
23
23
12
86
Wind (km/h)
20
NE
20
NE
15
ENE
15
NNE
20
NE
20
NE
20
ENE
20
NE
25
ENE
25
ENE
25
NE
20
NE
20
NE
30
NE
25
ENE
25
ENE
25
ENE
25
NE
Wind State
cross
cross
cross
cross-off
cross
cross
cross-on
cross
cross-on
cross
cross
cross
cross
cross
cross
cross-on
cross
cross
High Tide
7:37PM1.73m
8:59AM1.43m
8:10PM1.64m
10:22AM1.32m
8:46PM1.52m
Low Tide
2:33AM0.47m
2:10PM1.01m
3:29AM0.55m
2:53PM1.15m
heavy rain
heavy rain
rain showers
rain showers
clear
clear
clear
part cloud
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:30
5:31
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:52
5:51
 mm
11
23
4
1
Temp °C
21
21
21
22
22
23
24
24
24
22
21
21
20
21
25
26
25
24
Feels °C
21
21
21
23
22
23
23
23
22
19
19
20
18
17
22
24
23
22
  • 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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