Katahama Surf Break

Katahama 48 hour detailed Surf Forecast

Lat Long: 34.72° N 138.22° E

Issued: 2 am 23 Jun 2026 (local time)

Forecast update in  hr  min

Today's Katahama sea temperature is
22.5° C

1.4°C colder than average for this time of year

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 (23 Jun):

  • Morning surf: Morning surf (23 Jun, local time) - 3.5ft (1.1m), 5s period with E swell.
  • Afternoon surf: Afternoon surf (23 Jun, local time) - 3ft (0.9m), 5s period with E swell.
  • Evening surf: Evening surf (23 Jun, local time) - 1ft (0.3m), 10s period with SE swell.

The current surf forecast for Katahama at 6AM is: 1.0m 5s primary swell from a East direction (forecast issued at 02:00am June 23). An open ocean swell of 0.6m 6s is not directed at the surf break, a second open ocean swell of 0.5m 5s is not directed at the surf break. The wind direction is predicted to be cross-onshore.

Time (JST) & DateWave HeightWave Period
Morning (23 Jun)3.5ft (1.1m)5s
Afternoon (23 Jun)3ft (0.9m)5s
Evening (23 Jun)1ft (0.3m)10s

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


Updates in  hr  min  s Forecast update imminent

Short Range Forecast

Heavy rain (total 75mm), heaviest during Thu night. Warm (max 23°C on Thu night, min 19°C on Thu morning). Winds increasing (calm on Tue afternoon, strong winds from the SW by Thu night).

Tuesday
23
Wednesday
24
Thursday
25
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
12 PM
3 PM
6 PM
9 PM
Rating
(10 max)
0
0
0
0
0
1
0
0
1
0
0
0
0
0
0
1
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
Wave
Height (m)
Direction
Period (s)
0.4
SE
10
0.4
SE
11
1
E
5
1.1
E
5
1.2
E
5
0.9
E
5
0.4
SE
9
0.3
SE
10
0.5
E
10
0.4
SE
10
0.4
SE
10
0.4
SE
10
0.4
SE
11
0.4
SE
11
0.6
E
10
0.5
E
9
0.5
SSW
14
0.5
SSW
17
0.8
SSW
16
0.4
SE
11
0.4
SE
10
1.3
ESE
5
0.7
SE
5
1.5
SSW
14
Wave Graph
Metric surfscale
Energy kJ
36
29
47
62
76
43
23
16
45
37
37
38
41
41
65
42
0
0
0
40
37
66
27
0
Wind (km/h)
15
ENE
10
NE
10
ENE
15
ENE
10
NE
5
E
5
NE
5
NNE
5
NNE
5
NNE
5
NNE
10
NE
5
ESE
10
S
5
SSW
5
SE
5
ENE
10
ENE
15
E
20
ENE
25
NE
20
NE
20
ENE
10
ENE
Wind State
cross
cross
cross-on
cross
cross
glassy
glassy
glassy
glassy
cross-off
glassy
cross
cross-on
cross-on
cross-on
glassy
glassy
cross
cross-on
cross
cross
cross
cross
cross
High Tide
11:22PM1.49m
12:16PM1.14m
00:17AM1.48m
2:05PM1.18m
1:10AM1.48m
3:24PM1.27m
Low Tide
6:18AM0.71m
5:33PM0.83m
7:30AM0.60m
6:45PM0.95m
8:31AM0.49m
8:02PM1.03m
light rain
light rain
light rain
light rain
light rain
cloud
cloud
part cloud
part cloud
clear
clear
part cloud
part cloud
cloud
cloud
cloud
cloud
cloud
light rain
light rain
mod rain
light rain
light rain
heavy rain
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
4:33
4:33
4:35
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:02
7:02
7:04
 mm
1
1
1
1
2
1
4
7
5
5
12
Temp °C
22
21
21
20
20
21
21
20
20
20
20
21
22
22
22
21
21
21
20
19
19
19
20
20
Feels °C
23
22
23
20
21
23
23
22
22
21
22
22
23
22
23
23
23
22
21
18
17
18
19
21
Swell 1
Height (m)
Direction
Period (s)
1.1
WSW
6
0.7
SW
6
0.6
SW
6
0.4
SW
6
0.4
SE
11
0.4
SE
11
0.4
SE
9
0.3
SE
10
0.5
E
10
0.5
E
10
0.5
E
10
0.6
E
10
0.5
E
10
0.6
E
10
0.6
E
10
0.5
E
9
0.5
SSW
14
0.6
SSW
13
0.8
SSW
16
0.9
SSW
15
1.4
SSW
14
1.5
SSW
14
1.7
SSW
14
1.9
S
7
Energy kJ
98
39
24
14
32
43
23
16
45
50
50
71
50
71
65
42
105
111
277
344
834
826
1122
387
Swell 2
Height (m)
Direction
Period (s)
0.4
SE
10
0.6
W
5
0.5
W
5
0.4
SE
11
0.4
SW
6
0.4
SW
6
0.4
SW
6
0.3
ENE
10
0.3
SE
10
0.4
SE
10
0.4
SE
10
0.4
SE
10
0.4
SE
11
0.4
SE
11
0.4
SE
11
0.4
SSW
10
0.5
E
9
0.5
SSW
17
0.7
SSW
12
0.8
SSW
12
0.4
SE
10
0.4
SE
10
0.8
E
5
1.5
SSW
14
Energy kJ
36
19
11
31
9
9
9
18
15
37
37
38
41
41
41
33
43
160
131
158
37
36
29
779
Swell 3
Height (m)
Direction
Period (s)
0.2
ENE
10
0.4
SE
11
0.4
SE
11
0.3
W
5
0.2
W
4
0.2
ENE
10
0.3
ENE
10
0.2
WSW
6
0.3
SE
12
0.2
S
5
0.2
S
5
0.2
SSW
12
0.3
S
11
0.4
SSW
11
0.4
SSW
10
0.4
SE
11
0.5
S
10
0.4
ENE
9
0.5
S
9
0.4
SE
11
0.1
E
10
0.1
E
19
0.7
SE
5
0.4
SW
9
Energy kJ
9
29
41
4
1
9
19
4
23
2
2
14
22
40
36
41
49
27
40
40
2
7
27
23
Wind waves
Height (m)
Direction
Period (s)
0.3
E
3
0.7
E
4
1
E
5
1.1
E
5
1.2
E
5
0.9
E
5
0.6
E
5
0.4
ESE
4
0.4
ENE
3
0.4
ENE
3
0.3
E
4
0.4
ENE
4
0.5
E
8
0.7
E
4
1.3
ESE
5
2.2
SSW
7
Energy kJ
2
14
47
62
76
42
15
6
4
5
2
5
36
12
66
489
Nearest Offshore or Glassy
Rating
(10 max)
1
1
1
1
1
1
1
1
1
2
2
2
1
1
1
1
1
2
1
1
1
1
1
1
Distance (km)
13
13
94
94
150
2
104
104
6
186
186
186
6
104
65
2
2
13
208
103
103
103
66
103
Best forecast wave conditions in Shizuoka
Rating
(10 max)
1
1
1
1
1
1
1
1
1
1
2
1
Best forecast wave conditions in Japan
Rating
(10 max)
1
2
2
2
3
3
3
3
2
3
3
2
2
2
2
2
2
4
2
2
2
1
1
4
Header Global
Rating
(10 max)
6
5
5
5
5
5
5
5
5
5
7
8
7
9
9
9
8
7
6
6
5
5
5
5
  • 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
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