Katahama Surf Break

Katahama 48 hour detailed Surf Forecast

Lat Long: 34.72° N 138.22° E

Issued: 8 pm 30 Jun 2026 (local time)

Forecast update in  hr  min

Today's Katahama sea temperature is
23.0° 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 (01 Jul):

  • Morning surf: Morning surf (01 Jul, local time) - 1.5ft (0.4m), 10s period with ESE swell.
  • Afternoon surf: Afternoon surf (01 Jul, local time) - 1.5ft (0.5m), 9s period with SE swell.
  • Evening surf: Evening surf (01 Jul, local time) - 1.5ft (0.4m), 9s period with ESE swell.

The current surf forecast for Katahama at 3AM is: 0.5m 9s primary swell from a Southeast direction (forecast issued at 08:00pm June 30). An open ocean swell of 0.7m 7s is not directed at the surf break, a second open ocean swell of 0.6m 7s is not directed at the surf break. The wind direction is predicted to be glassy.

Time (JST) & DateWave HeightWave Period
Morning (01 Jul)1.5ft (0.4m)10s
Afternoon (01 Jul)1.5ft (0.5m)9s
Evening (01 Jul)1.5ft (0.4m)9s

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 48mm), heaviest during Wed night. Warm (max 27°C on Thu afternoon, min 21°C on Wed night). Winds increasing (calm on Tue night, fresh winds from the SW by Thu morning).

Tue
30
Wednesday
1
Thursday
2
Friday
3
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
12 PM
3 PM
Rating
(10 max)
0
1
0
0
0
0
0
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)
0.5
SE
9
0.5
SE
9
0.5
SE
9
0.5
SE
9
0.5
SE
9
0.4
ESE
10
0.5
SE
9
0.5
SE
9
0.5
SE
9
0.4
ESE
9
0.4
ESE
9
0.4
ESE
9
1.1
SW
5
0.4
ESE
9
0.4
ESE
9
0.4
SE
9
0.4
SE
9
0.3
ESE
9
0.3
ESE
9
0.8
E
4
0.9
E
5
0.8
E
5
0.7
E
5
0.3
ESE
9
Wave Graph
Metric surfscale
Energy kJ
41
41
41
41
41
36
41
41
40
32
31
31
51
30
32
20
20
15
16
17
34
30
28
16
Wind (km/h)
10
S
5
WSW
5
NW
0
N
5
N
5
ESE
10
SSE
10
SSW
5
SW
10
WSW
5
W
5
S
15
SSW
35
SW
25
WSW
25
WSW
25
WSW
25
W
10
N
15
E
15
ENE
10
NE
10
ENE
5
SSE
Wind State
cross-on
cross-off
off
glassy
glassy
on
on
cross-on
cross
cross-off
glassy
cross-on
cross
cross
cross-off
cross-off
cross-off
cross-off
cross-off
cross-on
cross-on
cross
cross
cross-on
High Tide
6:37PM1.55m
5:15AM1.63m
7:07PM1.58m
5:57AM1.62m
7:39PM1.60m
6:41AM1.58m
Low Tide
11:57PM1.03m
12:19PM0.14m
00:36AM0.97m
12:54PM0.18m
1:19AM0.91m
1:31PM0.24m
clear
part cloud
part cloud
clear
part cloud
part cloud
cloud
cloud
cloud
light rain
light rain
mod rain
heavy rain
thunderstorm
thunderstorm
rain showers
clear
clear
part cloud
light rain
light rain
cloud
part cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
4:37
4:37
4:37
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:04
7:04
7:04
7:04
 mm
1
3
8
19
12
2
1
1
1
Temp °C
24
23
23
22
22
24
24
24
24
23
22
21
23
24
25
27
26
25
22
21
21
21
22
23
Feels °C
27
26
26
26
25
27
27
26
27
26
25
24
25
22
26
28
25
24
23
21
22
21
23
24
Swell 1
Height (m)
Direction
Period (s)
1
SSW
7
1
SSW
7
0.7
S
7
0.7
S
7
0.6
S
7
0.8
SSW
7
0.8
SSW
6
0.8
SSW
6
0.9
SW
7
0.8
SSW
6
0.7
SW
6
0.6
SW
6
0.4
ESE
9
0.4
ESE
9
0.4
ESE
9
0.4
SE
9
0.4
SE
9
0.3
ESE
9
1.9
SW
8
1.6
SW
8
1.3
SW
7
1.1
SW
7
0.9
SW
7
0.8
SW
7
Energy kJ
83
91
47
44
32
56
52
52
63
54
39
30
31
30
32
20
20
15
452
300
174
115
82
57
Swell 2
Height (m)
Direction
Period (s)
0.5
SE
9
0.5
SE
9
0.6
SW
7
0.6
SW
7
0.6
SW
7
0.4
ESE
10
0.5
SE
9
0.5
SE
9
0.5
SE
9
0.4
ESE
9
0.4
ESE
9
0.4
ESE
9
0.2
ESE
13
0.2
ESE
13
0.2
ESE
13
0.2
ESE
12
0.2
ESE
12
0.2
ESE
12
0.3
ESE
9
0.2
ESE
12
0.3
ESE
9
0.3
ESE
9
0.3
ESE
9
0.3
ESE
9
Energy kJ
41
41
43
42
37
36
41
41
40
32
31
31
16
16
16
15
15
15
16
14
16
16
16
16
Swell 3
Height (m)
Direction
Period (s)
0.2
ESE
14
0.2
ESE
13
0.5
SE
9
0.5
SE
9
0.5
SE
9
0.2
ESE
13
0.2
ESE
13
0.2
ESE
13
0.2
ESE
13
0.2
ESE
13
0.2
ESE
13
0.2
ESE
13
0.1
SE
9
0.1
SE
9
0.1
SE
9
0.1
SE
9
0.2
ESE
12
0.2
E
12
0.2
ESE
12
0.2
ESE
12
0.2
ESE
12
0.2
ESE
12
Energy kJ
18
18
41
41
41
17
17
17
17
17
17
17
3
3
3
3
14
11
14
14
14
14
Wind waves
Height (m)
Direction
Period (s)
0.2
E
3
0.2
SSE
5
1.1
SW
5
2.2
SW
6
2.5
SW
8
2.2
SW
8
2.2
SW
8
2.2
SW
8
2.2
WSW
8
0.8
E
4
0.9
E
5
0.8
E
5
0.7
E
5
0.5
E
5
Energy kJ
1
2
51
384
818
574
619
624
589
17
34
30
28
14
Nearest Offshore or Glassy
Rating
(10 max)
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
1
3
1
2
1
1
1
1
1
Distance (km)
65
2
2
2
2
6
104
6
6
2
6
65
208
124
94
132
105
103
2
132
94
13
13
13
Best forecast wave conditions in Shizuoka
Rating
(10 max)
1
1
1
1
1
1
1
1
1
1
1
2
2
1
1
1
1
Best forecast wave conditions in Japan
Rating
(10 max)
1
2
2
2
1
1
1
1
1
1
2
1
1
2
2
3
3
2
2
1
1
1
1
1
Header Global
Rating
(10 max)
5
5
5
5
5
5
5
5
5
5
5
4
5
5
8
5
7
6
6
5
7
8
9
9
  • 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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