Katahama Surf Break

Katahama 48 hour detailed Surf Forecast

Lat Long: 34.72° N 138.22° E

Issued: 8 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) - 3ft (0.9m), 5s period with E swell.
  • Afternoon surf: Afternoon surf (23 Jun, local time) - 1.5ft (0.4m), 11s period with SE swell.
  • Evening surf: Evening surf (23 Jun, local time) - 1.5ft (0.4m), 10s period with SE swell.

The current surf forecast for Katahama at 4PM is: 0.4m 11s primary swell from a Southeast direction and 0.7m 5s secondary swell from a East direction (forecast issued at 08:00am June 23). An open ocean swell of 0.4m 6s is not directed at the surf break. The wind direction is predicted to be glassy.

Time (JST) & DateWave HeightWave Period
Morning (23 Jun)3ft (0.9m)5s
Afternoon (23 Jun)1.5ft (0.4m)11s
Evening (23 Jun)1.5ft (0.4m)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 30mm), heaviest during Thu night. Warm (max 23°C on Wed morning, min 19°C on Thu morning). Wind will be generally light.

Tuesday
23
Wednesday
24
Thursday
25
Fri
26
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
12 AM
3 AM
Rating
(10 max)
0
0
0
1
0
0
1
0
0
0
0
0
0
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
Wave
Height (m)
Direction
Period (s)
0.4
SE
11
0.9
E
5
0.9
E
5
0.4
SE
11
0.4
SE
9
0.4
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
0.4
SE
11
0.4
SE
11
0.4
SE
11
0.5
SSW
17
0.8
SSW
16
0.4
SE
11
0.4
SE
10
0.4
SE
10
0.8
E
4
0.4
SE
10
0.4
SE
10
1.7
SSW
14
Wave Graph
Metric surfscale
Energy kJ
41
43
43
43
23
26
45
37
37
38
41
41
41
41
41
0
0
40
37
36
18
26
26
0
Wind (km/h)
10
E
10
E
10
ESE
5
SE
5
SSE
5
SE
0
E
5
N
5
N
5
NE
5
SSE
10
SSW
10
SW
0
WSW
5
NE
10
NE
5
NE
15
ENE
20
NE
20
NE
20
NE
10
ENE
10
NE
5
S
Wind State
cross-on
cross-on
cross-on
glassy
glassy
glassy
glassy
glassy
cross-off
cross
cross-on
cross-on
cross
glassy
glassy
cross-off
cross
cross
cross
cross
cross
cross
cross
glassy
High Tide
12:16PM1.14m
00:17AM1.48m
2:05PM1.18m
1:10AM1.48m
3:24PM1.27m
1:58AM1.49m
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
cloud
cloud
part cloud
clear
clear
clear
clear
cloud
cloud
cloud
cloud
cloud
cloud
light rain
light rain
light rain
light rain
light rain
light rain
mod rain
light rain
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
4:33
4:33
4:35
4:35
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:02
7:02
7:04
7:04
 mm
1
1
1
1
3
4
2
2
4
6
3
Temp °C
21
21
21
21
21
21
21
20
20
21
23
22
22
21
21
21
20
20
19
19
20
20
20
21
Feels °C
23
22
22
23
23
23
24
22
21
22
24
22
23
23
23
22
21
20
18
18
19
21
22
24
Swell 1
Height (m)
Direction
Period (s)
0.6
SW
6
0.4
SW
6
0.4
SE
11
0.4
SE
11
0.5
E
4
0.3
ESE
4
0.5
E
10
0.5
E
10
0.5
E
10
0.5
E
10
0.5
E
10
0.5
E
10
0.5
E
10
0.5
E
10
0.5
SSW
14
0.6
SSW
13
0.8
SSW
16
1
SSW
15
1.3
SSW
14
1.5
SSW
14
1.6
SSW
14
1.5
SSW
14
1.5
SSW
14
1.7
SSW
14
Energy kJ
24
13
43
43
9
3
45
50
50
50
51
51
50
47
105
111
284
417
732
838
957
857
845
1065
Swell 2
Height (m)
Direction
Period (s)
0.5
W
5
0.4
SE
11
0.4
SW
6
0.4
SW
6
0.4
SE
9
0.4
SE
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
S
10
0.5
SSW
17
0.6
SSW
12
0.8
SSW
12
0.4
SE
10
0.4
SE
10
0.3
SE
10
1.3
SSW
8
1.4
SSW
7
1.2
SSW
7
Energy kJ
11
43
9
9
23
26
15
37
37
38
41
41
41
33
49
164
99
158
37
36
16
207
203
139
Swell 3
Height (m)
Direction
Period (s)
0.4
SE
11
0.4
W
4
0.2
W
4
0.2
ENE
10
0.3
ENE
10
0.3
ENE
10
0.3
SE
12
0.3
S
5
0.2
SSE
5
0.2
SSW
5
0.3
S
11
0.4
SSW
11
0.4
SSW
10
0.4
SE
11
0.4
SE
11
0.4
ENE
9
0.4
SSW
9
0.4
SE
11
0.1
E
19
0.1
E
19
0.2
ESE
12
0.4
SE
10
0.4
SE
10
0.4
SW
9
Energy kJ
41
6
1
9
19
18
23
4
2
3
23
40
36
41
41
28
26
40
7
7
15
26
26
20
Wind waves
Height (m)
Direction
Period (s)
0.8
E
5
0.9
E
5
0.9
E
5
0.7
E
5
0.6
E
4
0.3
ENE
3
0.3
ENE
3
0.3
ENE
3
0.5
E
8
0.7
ENE
3
0.8
ENE
4
0.8
E
4
0.6
E
4
0.5
E
4
1.2
SSW
7
Energy kJ
30
40
37
21
14
1
1
2
37
11
16
18
11
8
120
Nearest Offshore or Glassy
Rating
(10 max)
1
1
2
3
1
1
1
1
1
1
1
1
1
1
1
1
2
1
1
1
1
4
4
3
Distance (km)
94
94
236
236
104
94
6
6
94
94
13
6
6
2
2
2
13
103
103
103
103
13
13
2
Best forecast wave conditions in Shizuoka
Rating
(10 max)
1
1
1
1
1
1
1
1
1
1
1
1
2
2
4
4
3
Best forecast wave conditions in Japan
Rating
(10 max)
2
2
2
3
3
1
2
2
2
2
2
2
2
2
4
4
3
2
2
3
3
4
4
3
Header Global
Rating
(10 max)
5
5
5
5
5
5
5
5
7
8
9
9
9
9
8
7
6
5
5
5
5
5
5
4
  • 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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