Katahama Surf Break

Lat Long: 34.72° N 138.22° E

Katahama 48 hour detailed Surf Forecast

Issued: 2 pm 15 Jul 2026 (local time)

Forecast update in  hr  min

Today's Katahama sea temperature is
25.2° C
1.0° 

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 (15 Jul):

  • Afternoon surf: Afternoon surf (15 Jul, local time) - 1.5ft (0.4m), 10s period with ESE swell.
  • Evening surf: Evening surf (15 Jul, local time) - 1.5ft (0.4m), 9s period with ESE swell.

The current surf forecast for Katahama at 10PM is: 0.4m 9s primary swell from a East-southeast direction (forecast issued at 02:00pm July 15). An open ocean swell of 0.7m 9s is not directed at the surf break, a second open ocean swell of 0.8m 4s is not directed at the surf break. The wind direction is predicted to be cross-offshore.

Time (JST) & DateWave HeightWave Period
Morning (15 Jul)--
Afternoon (15 Jul)1.5ft (0.4m)10s
Evening (15 Jul)1.5ft (0.4m)9s

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


Short Range Forecast

Light rain (total 8mm), mostly falling on Fri afternoon. Warm (max 30°C on Wed afternoon, min 25°C on Fri night). Wind will be generally light.

Wed
15
Thursday
16
Friday
17
Sat
18
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
12 AM
3 AM
6 AM
9 AM
Rating
(10 max)
0
0
0
0
0
0
1
1
0
0
0
1
1
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
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.4
ESE
10
0.4
ESE
10
0.4
ESE
9
0.4
ESE
9
0.4
ESE
9
0.3
SE
11
0.5
E
9
0.5
E
9
0.5
E
9
0.5
E
8
0.6
E
8
0.6
E
8
0.6
E
9
0.6
E
9
0.6
E
9
0.6
E
9
0.6
E
9
0.6
E
9
0.7
E
9
0.6
E
9
0.5
E
8
0.6
E
8
0.6
E
8
0.6
E
8
Wave Graph
Metric surfscale
Energy kJ
30
31
29
28
27
18
41
37
36
35
52
52
56
57
56
56
55
54
74
53
35
51
51
51
Wind (km/h)
15
SSW
20
SW
25
WSW
15
SW
15
WSW
10
WSW
0
NNW
5
E
10
SSE
10
S
10
SSW
5
WSW
5
NE
5
ENE
10
NE
10
ESE
15
ESE
20
SE
20
ESE
15
ESE
15
ESE
10
E
10
NE
10
E
Wind State
cross-on
cross
cross-off
cross-off
cross-off
cross-off
glassy
glassy
cross-on
cross-on
cross-on
glassy
glassy
cross
cross
on
on
on
on
cross-on
cross-on
cross-on
cross
cross-on
High Tide
6:42PM1.61m
5:36AM1.65m
7:09PM1.64m
6:18AM1.64m
7:38PM1.66m
7:02AM1.60m
Low Tide
11:58AM0.19m
00:15AM0.97m
12:30PM0.21m
00:51AM0.89m
1:03PM0.25m
1:32AM0.82m
clear
clear
clear
part cloud
part cloud
part cloud
clear
clear
clear
clear
part cloud
part cloud
part cloud
part cloud
part cloud
thunderstorm
thunderstorm
thunderstorm
thunderstorm
part cloud
part cloud
clear
clear
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
4:45
4:45
4:46
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:00
7:00
7:00
6:59
 mm
2
1
3
2
Temp °C
30
30
29
28
27
26
26
28
30
30
29
28
28
27
27
27
28
28
26
25
25
25
25
26
Feels °C
32
31
30
31
30
29
31
32
34
34
33
33
33
32
31
31
31
31
28
27
27
28
28
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.


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