Katahama Surf Break

Lat Long: 34.72° N 138.22° E

Katahama 48 hour detailed Surf Forecast

Issued: 8 am 25 Jul 2026 (local time)

Forecast update in  hr  min

Today's Katahama sea temperature is
27.1° 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 (25 Jul):

  • Morning surf: Morning surf (25 Jul, local time) - 1ft (0.3m), 16s period with SE swell.
  • Afternoon surf: Afternoon surf (25 Jul, local time) - 1ft (0.3m), 16s period with SE swell.
  • Evening surf: Evening surf (25 Jul, local time) - 1ft (0.3m), 15s period with SE swell.

The current surf forecast for Katahama at 1PM is: 0.3m 16s primary swell from a Southeast direction and 0.4m 10s secondary swell from a Southeast direction (forecast issued at 08:00am July 25). An open ocean swell of 0.3m 4s is not directed at the surf break. The wind direction is predicted to be cross-onshore.

Time (JST) & DateWave HeightWave Period
Morning (25 Jul)1ft (0.3m)16s
Afternoon (25 Jul)1ft (0.3m)16s
Evening (25 Jul)1ft (0.3m)15s

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


Short Range Forecast

Mostly dry. Warm (max 31°C on Sat afternoon, min 25°C on Mon night). Wind will be generally light.

Saturday
25
Sunday
26
Monday
27
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
12 PM
3 PM
6 PM
9 PM
Rating
(10 max)
1
1
0
0
0
0
0
0
0
0
0
0
0
1
1
1
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
Wave
Height (m)
Direction
Period (s)
0.3
SE
16
0.3
SE
16
0.3
SE
16
0.3
SE
16
0.3
SE
16
0.3
SE
15
0.4
SE
15
0.4
SE
15
0.4
SE
15
0.3
SE
15
0.4
SE
15
0.4
SE
14
0.4
SE
14
0.4
SE
14
0.4
SE
14
0.4
SE
14
0.4
SE
14
0.4
SE
10
0.4
SE
10
0.5
E
9
0.3
SE
14
0.5
SE
10
Wave Graph
Metric surfscale
Energy kJ
41
41
40
40
39
37
58
57
56
41
54
74
74
73
73
72
72
38
38
41
37
48
Wind (km/h)
5
N
5
SE
15
SSE
15
SSE
15
SSE
15
ESE
15
ESE
10
E
5
SSE
10
SSE
15
S
15
SSW
10
S
10
WSW
10
W
10
N
10
E
10
ESE
15
SSE
20
SSE
15
SE
10
ESE
Wind State
glassy
glassy
cross-on
on
on
on
cross-on
cross-on
on
cross-on
cross-on
cross-on
cross-on
cross-off
cross-off
cross-off
cross-on
cross-on
cross-on
on
on
on
High Tide
4:33PM1.40m
2:19AM1.48m
5:08PM1.49m
3:12AM1.52m
5:34PM1.54m
Low Tide
9:03AM0.46m
9:20PM1.21m
9:53AM0.37m
10:20PM1.18m
10:33AM0.31m
clear
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
cloud
cloud
part cloud
part cloud
clear
clear
part cloud
cloud
part cloud
part cloud
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
4:50
4:52
4:52
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:54
6:53
6:53
 mm
Temp °C
27
29
30
31
29
27
26
26
26
27
28
28
28
28
27
26
26
26
27
27
26
26
Feels °C
33
34
33
34
32
31
29
30
30
30
31
31
32
33
31
30
30
30
29
28
28
29
  • 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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