Surf Break

Lat Long: 34.72° N 138.22° E

Katahama 48 hour detailed Surf Forecast

Issued: 2 pm 17 Oct 2026 (local time)

Forecast update in  hr  min

Today's Katahama sea temperature is
24.1°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 (17 Oct):

  • Afternoon surf: Afternoon surf (17 Oct, local time) - 3.5ft (1.1m), 6s 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 10PM is: 1.1m 7s primary swell from a East direction and 0.2m 7s secondary swell from a South-southeast direction, 0.1m 12s secondary swell from a South direction (forecast issued at 02:00pm October 17). The wind direction is predicted to be cross-onshore.

Time (JST) & DateWave HeightWave Period
Morning (17 Oct)--
Afternoon (17 Oct)3.5ft (1.1m)6s
Evening (17 Oct)4ft (1.2m)7s

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


Short Range Forecast

Light rain (total 2mm), mostly falling on Tue morning. Warm (max 24°C on Mon morning, min 19°C on Sat night). Wind will be generally light.

Sat
17
Sunday
18
Monday
19
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
1
1
1
1
1
0
0
0
1
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.8
E
5
1.1
E
6
1.2
E
7
1.2
E
7
1.1
E
7
1
E
7
0.9
ESE
6
0.9
ESE
6
0.9
ESE
6
0.9
ESE
6
0.9
ESE
6
0.9
ESE
6
0.9
SE
6
0.9
SE
6
0.9
SE
6
1
SE
7
1
SE
7
1.1
SE
8
1.1
SE
8
1.1
SE
9
Wave Graph
Metric surfscale
Energy kJ
29
100
146
150
127
112
56
55
43
47
55
55
54
62
66
102
102
138
138
172
Wind (km/h)
10
ESE
15
SE
15
ESE
15
ESE
15
ENE
10
ENE
10
ENE
15
ENE
15
E
15
SE
10
ESE
5
NE
5
NNE
5
N
5
NNW
5
W
15
SW
20
SW
20
WSW
20
WSW
Wind State
on
on
on
cross-on
cross
cross-on
cross
cross
cross-on
on
on
glassy
glassy
glassy
glassy
cross-off
cross
cross
cross-off
cross-off
High Tide
10:10AM1.38m
8:17PM1.46m
12:13PM1.38m
9:29PM1.31m
1:42PM1.44m
Low Tide
3:04PM1.18m
4:09AM0.56m
5:23PM1.21m
5:40AM0.64m
7:47PM1.11m
part cloud
part cloud
clear
clear
part cloud
clear
clear
clear
clear
clear
clear
part cloud
cloud
cloud
cloud
part cloud
part cloud
cloud
cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
—
—
—
—
—
5:54
—
—
—
—
—
—
—
5:54
—
—
—
—
—
—
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
—
5:10
—
—
—
—
—
—
—
5:08
—
—
—
—
—
—
—
5:07
—
—
 mm
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
Temp °C
23
22
21
21
20
20
19
19
21
22
21
21
20
20
21
21
24
24
23
23
Feels °C
23
20
19
20
19
19
18
17
19
20
20
21
20
20
22
21
23
22
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 

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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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