Katahama Surf Break

Lat Long: 34.72° N 138.22° E

Katahama 48 hour detailed Surf Forecast

Issued: 2 am 13 Sep 2026 (local time)

Forecast update in  hr  min

Today's Katahama sea temperature is
27.0°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 (13 Sep):

  • Morning surf: Morning surf (13 Sep, local time) - 2.5ft (0.7m), 13s period with ESE swell.
  • Afternoon surf: Afternoon surf (13 Sep, local time) - 2ft (0.6m), 13s period with E swell.
  • Evening surf: Evening surf (13 Sep, local time) - 2.5ft (0.7m), 13s period with E swell.

The current surf forecast for Katahama at 10AM is: 0.7m 13s primary swell from a East-southeast direction and 0.5m 4s secondary swell from a East direction (forecast issued at 02:00am September 13). An open ocean swell of 0.4m 7s is not directed at the surf break. The wind direction is predicted to be cross-shore.

Time (JST) & DateWave HeightWave Period
Morning (13 Sep)2.5ft (0.7m)13s
Afternoon (13 Sep)2ft (0.6m)13s
Evening (13 Sep)2.5ft (0.7m)13s

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


Short Range Forecast

Moderate rain (total 13mm), heaviest on Tue night. Warm (max 27°C on Mon morning, min 22°C on Mon night). Wind will be generally light.

Sunday
13
Monday
14
Tuesday
15
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
12 AM
3 AM
6 AM
9 AM
12 PM
3 PM
6 PM
9 PM
Rating
(10 max)
0
1
0
0
0
0
1
2
2
1
1
2
0
0
1
1
2
2
2
2
2
2
2
1
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.6
ESE
13
0.7
ESE
13
0.7
ESE
13
0.7
ESE
13
0.6
E
13
0.6
E
13
0.7
E
13
0.7
E
13
0.7
E
13
0.6
E
12
0.7
E
12
0.9
ESE
12
0.7
E
12
0.7
E
12
0.7
E
12
0.9
SE
10
0.9
SSE
9
1.1
SE
9
1
SE
9
1
SE
9
0.9
SE
9
1
SE
9
0.6
E
14
0.7
SE
8
Wave Graph
Metric surfscale
Energy kJ
137
184
184
178
123
121
166
166
158
108
144
226
139
141
139
154
151
172
159
152
129
145
142
67
Wind (km/h)
10
NE
10
ENE
10
NE
10
NE
10
ESE
10
S
10
S
0
ENE
5
NNE
5
NNE
5
NNE
5
S
10
SSW
15
SW
25
WSW
10
SW
5
W
5
W
5
WNW
0
NE
0
NNW
5
NW
5
N
5
NNE
Wind State
cross
cross
cross
cross
on
cross-on
cross-on
glassy
glassy
cross-off
glassy
glassy
cross-on
cross
cross-off
cross
cross-off
cross-off
glassy
glassy
glassy
glassy
glassy
cross-off
High Tide
6:04AM1.72m
6:14PM1.79m
6:41AM1.70m
6:39PM1.80m
7:20AM1.64m
7:07PM1.78m
Low Tide
00:04AM0.54m
12:10PM0.57m
00:34AM0.46m
12:37PM0.65m
1:08AM0.42m
1:05PM0.75m
cloud
cloud
cloud
clear
clear
part cloud
clear
part cloud
clear
clear
clear
clear
thunderstorm
cloud
light rain
light rain
light rain
light rain
light rain
cloud
rain showers
light rain
cloud
cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:26
5:28
5:28
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:58
5:55
5:54
 mm
1
1
1
1
1
1
1
1
Temp °C
22
22
22
24
25
25
25
25
25
24
24
26
27
27
24
22
23
23
23
23
23
25
25
24
Feels °C
24
24
24
27
28
28
29
30
30
28
28
30
30
29
23
24
25
25
26
27
27
29
29
27
  • 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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