Katahama Surf Break

Lat Long: 34.72° N 138.22° E

Katahama 48 hour detailed Surf Forecast

Issued: 2 am 12 Sep 2026 (local time)

Forecast update in  hr  min

Today's Katahama sea temperature is
27.1°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 (12 Sep):

  • Morning surf: Morning surf (12 Sep, local time) - 2ft (0.6m), 14s period with ESE swell.
  • Afternoon surf: Afternoon surf (12 Sep, local time) - 2ft (0.6m), 14s period with ESE swell.
  • Evening surf: Evening surf (12 Sep, local time) - 2ft (0.6m), 13s period with ESE swell.

The current surf forecast for Katahama at 6AM is: 0.6m 14s primary swell from a East-southeast direction and 1.0m 5s secondary swell from a East direction (forecast issued at 02:00am September 12). An open ocean swell of 0.7m 7s is not directed at the surf break. The wind direction is predicted to be cross-shore.

Time (JST) & DateWave HeightWave Period
Morning (12 Sep)2ft (0.6m)14s
Afternoon (12 Sep)2ft (0.6m)14s
Evening (12 Sep)2ft (0.6m)13s

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


Short Range Forecast

Moderate rain (total 10mm), heaviest on Mon night. Warm (max 27°C on Mon morning, min 22°C on Sat morning). Wind will be generally light.

Saturday
12
Sunday
13
Monday
14
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
0
0
0
0
0
0
0
0
0
0
0
0
0
1
2
2
1
1
2
0
0
1
2
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)
0.5
E
14
0.5
E
14
0.6
ESE
14
0.6
ESE
14
0.6
ESE
14
0.6
ESE
14
0.6
ESE
14
0.6
ESE
13
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
0.8
SE
10
Wave Graph
Metric surfscale
Energy kJ
94
94
145
149
147
149
145
139
137
184
184
178
123
121
166
166
158
108
144
226
139
141
141
127
Wind (km/h)
15
NE
15
NE
15
NE
15
NE
15
NE
15
NE
10
NE
15
NE
10
NE
10
ENE
10
NE
10
ENE
10
SE
10
S
10
S
0
E
5
N
5
N
5
NNE
0
S
15
SSW
15
SSW
10
SW
10
W
Wind State
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
on
cross-on
cross-on
glassy
glassy
cross-off
cross-off
glassy
cross-on
cross
cross
cross-off
High Tide
5:30AM1.71m
5:51PM1.76m
6:04AM1.72m
6:14PM1.79m
6:41AM1.70m
6:39PM1.80m
Low Tide
11:38PM0.64m
11:44AM0.52m
00:04AM0.54m
12:10PM0.57m
00:34AM0.46m
12:37PM0.65m
light rain
light rain
light rain
light rain
cloud
cloud
cloud
cloud
cloud
part cloud
part cloud
part cloud
part cloud
clear
clear
clear
clear
clear
clear
clear
part cloud
part cloud
part cloud
cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:26
5:26
5:28
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:59
5:58
5:55
 mm
3
4
3
1
Temp °C
22
22
22
22
22
23
23
23
23
23
23
24
25
26
25
25
25
24
24
26
27
27
26
26
Feels °C
24
24
23
23
23
24
25
25
25
26
26
27
28
29
29
30
30
27
27
31
29
29
29
29
  • 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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