Katahama Surf Break

Lat Long: 34.72° N 138.22° E

Katahama 48 hour detailed Surf Forecast

Issued: 8 am 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 (15 Sep):

  • Morning surf: Morning surf (15 Sep, local time) - 3.5ft (1.1m), 9s period with SE swell.
  • Afternoon surf: Afternoon surf (15 Sep, local time) - 2ft (0.6m), 14s period with E swell.
  • Evening surf: Evening surf (15 Sep, local time) - 2.5ft (0.8m), 8s period with ESE swell.

The current surf forecast for Katahama at 3PM is: 0.6m 14s primary swell from a East direction and 1.0m 6s secondary swell from a South direction, 0.8m 9s secondary swell from a East-southeast direction (forecast issued at 08:00am September 15). The wind direction is predicted to be cross-shore.

Time (JST) & DateWave HeightWave Period
Morning (15 Sep)3.5ft (1.1m)9s
Afternoon (15 Sep)2ft (0.6m)14s
Evening (15 Sep)2.5ft (0.8m)8s

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


Short Range Forecast

Heavy rain (total 65mm), heaviest during Wed night. Warm (max 25°C on Tue morning, min 20°C on Thu night). Wind will be generally light.

Tuesday
15
Wednesday
16
Thursday
17
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)
1
1
1
1
0
2
1
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
Height Map
Wave
Height (m)
Direction
Period (s)
1.1
SE
9
1.1
SE
9
0.8
ESE
9
0.6
E
14
0.8
ESE
9
0.8
ESE
8
0.8
ESE
8
0.5
E
13
0.5
E
13
0.5
E
13
0.5
E
13
0.5
E
13
0.5
E
13
0.5
E
12
1.1
E
6
0.5
E
12
1.2
E
7
1.4
E
7
0.3
E
12
0.3
E
12
0.2
SSE
9
0.1
SE
9
Wave Graph
Metric surfscale
Energy kJ
179
202
101
131
86
86
86
92
92
84
84
83
82
75
75
71
128
188
25
25
8
3
Wind (km/h)
5
NE
10
ENE
10
NE
10
ENE
10
ENE
10
NNE
10
NE
10
NE
10
NE
10
NE
15
NE
15
ENE
20
NE
10
ENE
15
NE
10
NE
15
NE
25
NE
25
ENE
20
ENE
20
ENE
25
NE
Wind State
cross
cross
cross
cross
cross
cross-off
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
High Tide
7:20AM1.64m
7:07PM1.78m
8:05AM1.54m
7:37PM1.73m
8:59AM1.43m
8:10PM1.64m
Low Tide
1:05PM0.75m
1:47AM0.42m
1:36PM0.87m
2:33AM0.47m
2:10PM1.01m
light rain
light rain
thunderstorm
thunderstorm
thunderstorm
thunderstorm
cloud
cloud
light rain
mod rain
light rain
mod rain
mod rain
heavy rain
rain showers
light rain
light rain
cloud
part cloud
clear
part cloud
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:28
5:30
5:30
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:54
5:53
5:52
 mm
3
3
2
1
1
2
1
6
1
6
6
11
23
1
1
Temp °C
23
23
25
25
24
24
24
24
23
23
23
22
22
22
21
21
22
22
23
23
22
21
Feels °C
26
26
28
28
27
27
27
27
26
26
25
23
22
24
22
22
22
20
21
21
20
18
  • 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.


Nearest locationNearest