Katahama Surf Break

Lat Long: 34.72° N 138.22° E

Katahama 48 hour detailed Surf Forecast

Issued: 8 pm 15 Sep 2026 (local time)

Forecast update in  hr  min

Today's Katahama sea temperature is
26.5°C
0.1° 

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 (16 Sep):

  • Morning surf: Morning surf (16 Sep, local time) - 2ft (0.6m), 13s period with E swell.
  • Afternoon surf: Afternoon surf (16 Sep, local time) - 2ft (0.6m), 13s period with E swell.
  • Evening surf: Evening surf (16 Sep, local time) - 1.5ft (0.5m), 12s period with E swell.

The current surf forecast for Katahama at 2AM is: 0.8m 8s primary swell from a East-southeast direction (forecast issued at 08:00pm September 15). An open ocean swell of 0.7m 6s is not directed at the surf break. The wind direction is predicted to be cross-offshore.

Time (JST) & DateWave HeightWave Period
Morning (16 Sep)2ft (0.6m)13s
Afternoon (16 Sep)2ft (0.6m)13s
Evening (16 Sep)1.5ft (0.5m)12s

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


Short Range Forecast

Heavy rain (total 51mm), heaviest during Wed morning. Warm (max 25°C on Tue night, min 20°C on Thu night). Wind will be generally light.

Tue
15
Wednesday
16
Thursday
17
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)
2
2
1
1
1
2
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)
0.6
E
14
0.8
ESE
8
0.8
ESE
8
0.5
E
13
0.9
SE
8
0.6
E
13
0.9
ESE
8
0.6
E
13
0.5
E
13
0.5
E
12
0.5
E
12
1.2
E
6
1.3
E
6
1.3
E
7
1.3
E
7
1.4
E
7
1.6
E
6
2
E
7
Wave Graph
Metric surfscale
Energy kJ
142
86
88
90
93
121
94
119
82
75
71
94
143
150
159
206
193
342
Wind (km/h)
5
SW
5
NNE
5
NNE
5
N
5
N
10
NNE
10
ENE
15
SE
10
ENE
20
NE
20
NE
20
NE
20
NE
20
NE
20
NE
20
NE
20
ENE
25
ENE
Wind State
glassy
glassy
cross-off
cross-off
glassy
cross-off
cross
on
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
High Tide
7:07PM1.78m
8:05AM1.54m
7:37PM1.73m
8:59AM1.43m
8:10PM1.64m
Low Tide
1:47AM0.42m
1:36PM0.87m
2:33AM0.47m
2:10PM1.01m
part cloud
thunderstorm
thunderstorm
thunderstorm
mod rain
heavy rain
thunderstorm
thunderstorm
light rain
light rain
light rain
light rain
part cloud
cloud
part cloud
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:30
5:30
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:53
5:52
 mm
1
2
3
9
22
2
3
3
3
2
1
Temp °C
25
25
24
23
22
22
23
23
23
22
22
21
21
22
23
24
23
22
Feels °C
29
30
28
26
25
25
26
25
26
23
22
21
21
21
22
23
21
19
  • 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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