Surf Break

Lat Long: 34.72° N 138.22° E

Katahama 48 hour detailed Surf Forecast

Issued: 8 pm 16 Oct 2026 (local time)

Forecast update in  hr  min

Today's Katahama sea temperature is
24.3°C
0.3° 

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 (17 Oct):

  • Morning surf: Morning surf (17 Oct, local time) - 1ft (0.3m), 8s period with ESE swell.
  • Afternoon surf: Afternoon surf (17 Oct, local time) - 4ft (1.2m), 7s period with E swell.
  • Evening surf: Evening surf (17 Oct, local time) - 4ft (1.2m), 7s period with E swell.

The current surf forecast for Katahama at 4AM is: 0.4m 8s primary swell from a East-southeast direction (forecast issued at 08:00pm October 16). An open ocean swell of 0.2m 4s is not directed at the surf break, a second open ocean swell of 0.4m 7s is not directed at the surf break. The wind direction is predicted to be cross-offshore.

Time (JST) & DateWave HeightWave Period
Morning (17 Oct)1ft (0.3m)8s
Afternoon (17 Oct)4ft (1.2m)7s
Evening (17 Oct)4ft (1.2m)7s

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


Short Range Forecast

Mostly dry. Warm (max 23°C on Mon morning, min 19°C on Sat night). Wind will be generally light.

Fri
16
Saturday
17
Sunday
18
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
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
6
0.3
ESE
8
0.3
ESE
8
0.4
ESE
8
0.4
ESE
8
0.3
ESE
8
1.1
E
6
1.2
E
7
1.2
E
7
1.2
E
7
1.1
E
8
1.1
E
8
1
E
8
1
ESE
6
0.9
ESE
6
0.9
ESE
6
0.8
ESE
6
0.9
SE
6
Wave Graph
Metric surfscale
Energy kJ
13
13
12
19
19
11
78
126
150
155
145
157
131
72
64
53
41
47
Wind (km/h)
10
E
10
NE
5
N
10
NNW
10
NNE
15
NE
15
ENE
15
SE
15
ESE
15
ESE
10
ENE
10
ENE
10
ENE
15
ENE
10
E
15
ESE
10
ESE
0
S
Wind State
cross-on
cross
cross-off
cross-off
cross-off
cross
cross
on
on
cross-on
cross-on
cross-on
cross
cross-on
cross-on
on
on
glassy
High Tide
7:35PM1.59m
10:10AM1.38m
8:17PM1.46m
12:13PM1.38m
Low Tide
2:58AM0.45m
3:04PM1.18m
4:09AM0.56m
5:23PM1.21m
cloud
cloud
clear
clear
clear
clear
part cloud
part cloud
cloud
part cloud
part cloud
clear
part cloud
part cloud
clear
clear
clear
cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
—
—
—
5:52
—
—
—
—
—
—
—
5:54
—
—
—
—
—
—
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
—
—
—
—
—
—
—
5:10
—
—
—
—
—
—
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5:08
—
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 mm
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
Temp °C
21
21
21
20
20
21
22
22
21
21
20
20
19
20
21
21
22
22
Feels °C
20
20
21
19
19
19
21
20
19
20
19
19
18
18
20
19
21
22
  • 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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