Katahama Surf Break

Lat Long: 34.72° N 138.22° E

Katahama 48 hour detailed Surf Forecast

Issued: 8 pm 11 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 2AM is: 0.5m 14s primary swell from a East direction and 0.9m 4s secondary swell from a East direction (forecast issued at 08:00pm September 11). An open ocean swell of 0.9m 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

Heavy rain (total 20mm), heaviest during Fri night. Warm (max 27°C on Mon afternoon, min 22°C on Fri night). Wind will be generally light.

Fri
11
Saturday
12
Sunday
13
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
0
0
1
1
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.4
ESE
14
0.4
ESE
14
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
Wave Graph
Metric surfscale
Energy kJ
67
63
94
94
145
149
147
149
145
139
137
184
184
178
123
121
166
166
Wind (km/h)
10
ENE
10
ENE
15
NE
15
NE
15
NE
15
NE
15
NE
15
NE
10
NE
15
NE
10
NE
10
NE
10
NE
10
ENE
10
E
5
SSE
10
SE
5
E
Wind State
cross-on
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross-on
on
on
cross-on
High Tide
5:31PM1.72m
5:30AM1.71m
5:51PM1.76m
6:04AM1.72m
6:14PM1.79m
Low Tide
11:38PM0.64m
11:44AM0.52m
00:04AM0.54m
12:10PM0.57m
light rain
light rain
light rain
light rain
light rain
light rain
light rain
cloud
cloud
cloud
light rain
cloud
part cloud
clear
part cloud
part cloud
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:26
5:26
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:00
5:59
5:58
 mm
2
4
4
5
3
2
1
1
Temp °C
22
22
22
22
22
22
22
22
22
22
22
22
23
24
25
26
25
24
Feels °C
25
25
24
24
24
24
23
23
24
23
23
24
26
27
28
30
29
28
  • 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