Katahama Surf Break

Lat Long: 34.72° N 138.22° E

Katahama 48 hour detailed Surf Forecast

Issued: 8 pm 09 Sep 2026 (local time)

Forecast update in  hr  min

Today's Katahama sea temperature is
27.1°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 (10 Sep):

  • Morning surf: Morning surf (10 Sep, local time) - 0.5ft (0.2m), 15s period with ESE swell.
  • Afternoon surf: Afternoon surf (10 Sep, local time) - 1ft (0.3m), 15s period with ESE swell.
  • Evening surf: Evening surf (10 Sep, local time) - 1ft (0.3m), 15s period with ESE swell.

The current surf forecast for Katahama at 12AM is: 0.2m 16s primary swell from a East direction (forecast issued at 08:00pm September 09). An open ocean swell of 2.3m 9s is not directed at the surf break. The wind direction is predicted to be cross-onshore.

Time (JST) & DateWave HeightWave Period
Morning (10 Sep)0.5ft (0.2m)15s
Afternoon (10 Sep)1ft (0.3m)15s
Evening (10 Sep)1ft (0.3m)15s

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


Short Range Forecast

Heavy rain (total 74mm), heaviest during Thu afternoon. Warm (max 24°C on Wed night, min 20°C on Thu afternoon). Wind will be generally light.

Wed
9
Thursday
10
Friday
11
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
0
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.2
E
16
0.2
E
16
0.2
E
16
0.2
E
16
1.2
E
5
0.2
ESE
15
0.3
ESE
15
0.3
ESE
15
0.3
ESE
15
0.3
ESE
15
0.3
ESE
16
1
E
6
0.4
ESE
14
0.4
ESE
14
0.4
ESE
14
0.4
ESE
14
0.4
ESE
14
0.4
ESE
14
Wave Graph
Metric surfscale
Energy kJ
21
21
21
25
83
21
43
42
42
47
48
68
64
63
67
68
67
63
Wind (km/h)
15
SW
10
SW
10
E
15
ENE
20
NE
20
NE
25
NE
25
NE
20
NE
20
NE
20
NE
15
NE
15
ENE
10
ENE
10
NE
10
NE
10
NE
10
NE
Wind State
cross
cross
cross-on
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
High Tide
4:55PM1.64m
4:20AM1.61m
5:12PM1.68m
4:56AM1.67m
5:31PM1.72m
Low Tide
10:52PM0.87m
10:53AM0.46m
11:15PM0.76m
11:19AM0.48m
thunderstorm
rain showers
light rain
light rain
light rain
cloud
cloud
light rain
heavy rain
mod rain
cloud
cloud
light rain
light rain
light rain
mod rain
light rain
mod rain
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:24
5:26
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:02
6:01
6:00
 mm
3
2
1
1
1
4
24
6
3
2
2
8
4
8
Temp °C
27
24
23
23
22
22
21
20
20
20
21
21
21
21
21
21
21
21
Feels °C
30
27
25
24
22
21
19
18
19
20
21
21
22
23
23
23
23
23
  • 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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