Katahama Surf Break

Lat Long: 34.72° N 138.22° E

Katahama 48 hour detailed Surf Forecast

Issued: 2 am 14 Sep 2026 (local time)

Forecast update in  hr  min

Today's Katahama sea temperature is
26.8°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 (14 Sep):

  • Morning surf: Morning surf (14 Sep, local time) - 3ft (0.9m), 12s period with ESE swell.
  • Afternoon surf: Afternoon surf (14 Sep, local time) - 2.5ft (0.7m), 12s period with E swell.
  • Evening surf: Evening surf (14 Sep, local time) - 3.5ft (1.0m), 10s period with SE swell.

The current surf forecast for Katahama at 6AM is: 0.7m 12s primary swell from a East direction and 0.6m 7s secondary swell from a Southeast direction (forecast issued at 02:00am September 14). The wind direction is predicted to be cross-offshore.

Time (JST) & DateWave HeightWave Period
Morning (14 Sep)3ft (0.9m)12s
Afternoon (14 Sep)2.5ft (0.7m)12s
Evening (14 Sep)3.5ft (1.0m)10s

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


Short Range Forecast

Heavy rain (total 40mm), heaviest during Wed night. Warm (max 27°C on Mon morning, min 21°C on Mon night). Wind will be generally light.

Monday
14
Tuesday
15
Wednesday
16
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)
2
1
1
2
0
0
1
1
2
2
2
2
1
1
1
0
1
2
1
1
0
0
0
0
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)
0.7
E
13
0.6
E
12
0.7
E
12
0.9
ESE
12
0.7
E
12
0.7
E
12
0.9
SE
10
1
SE
10
1
SSE
9
1
SE
9
1
SE
9
1
SE
9
1
SE
9
1
SE
9
0.6
E
14
0.8
ESE
8
0.8
ESE
8
0.7
E
13
0.6
E
13
0.6
E
13
0.9
ESE
8
0.9
ESE
8
0.5
E
13
1.3
E
6
Wave Graph
Metric surfscale
Energy kJ
158
108
144
226
139
141
139
181
176
152
156
152
149
142
142
84
86
165
121
121
100
116
82
118
Wind (km/h)
5
N
5
N
5
N
5
SSE
10
SW
15
SW
15
SW
15
SW
10
WSW
5
NNE
5
NNE
5
N
5
NE
10
NE
10
NE
10
NE
10
NNE
10
NNE
10
NNE
10
NE
15
NE
15
ENE
20
NE
25
NE
Wind State
glassy
cross-off
cross-off
glassy
cross
cross
cross
cross-off
cross-off
glassy
glassy
cross-off
cross
cross
cross
cross
cross-off
cross-off
cross-off
cross
cross
cross
cross
cross
High Tide
6:41AM1.70m
6:39PM1.80m
7:20AM1.64m
7:07PM1.78m
8:05AM1.54m
7:37PM1.73m
Low Tide
00:34AM0.46m
12:37PM0.65m
1:08AM0.42m
1:05PM0.75m
1:47AM0.42m
1:36PM0.87m
clear
part cloud
part cloud
part cloud
cloud
cloud
part cloud
thunderstorm
light rain
light rain
light rain
light rain
light rain
thunderstorm
part cloud
rain showers
rain showers
cloud
thunderstorm
thunderstorm
thunderstorm
thunderstorm
mod rain
mod rain
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:28
5:28
5:30
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:55
5:54
5:53
 mm
1
3
1
2
3
3
4
1
1
2
2
1
2
6
8
Temp °C
24
25
26
26
27
27
26
25
23
22
21
22
22
23
23
23
23
23
23
23
24
23
22
21
Feels °C
29
29
30
30
29
29
29
27
25
24
24
25
25
26
26
25
25
25
26
26
26
25
22
20
  • 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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