Katahama Surf Break

Katahama 48 hour detailed Surf Forecast

Lat Long: 34.72° N 138.22° E

Issued: 8 am 30 Jun 2026 (local time)

Forecast update in  hr  min

Today's Katahama sea temperature is
23.1° C

1.2°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 (30 Jun):

  • Morning surf: Morning surf (30 Jun, local time) - 2ft (0.6m), 10s period with SE swell.
  • Afternoon surf: Afternoon surf (30 Jun, local time) - 1.5ft (0.5m), 9s period with SE swell.
  • Evening surf: Evening surf (30 Jun, local time) - 1.5ft (0.5m), 9s period with SE swell.

The current surf forecast for Katahama at 2PM is: 0.5m 9s primary swell from a Southeast direction and 0.3m 3s secondary swell from a East-southeast direction (forecast issued at 08:00am June 30). An open ocean swell of 1.0m 7s is not directed at the surf break. The wind direction is predicted to be cross-onshore.

Time (JST) & DateWave HeightWave Period
Morning (30 Jun)2ft (0.6m)10s
Afternoon (30 Jun)1.5ft (0.5m)9s
Evening (30 Jun)1.5ft (0.5m)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 27mm), heaviest during Thu morning. Warm (max 25°C on Wed morning, min 21°C on Wed night). Winds increasing (calm on Tue night, fresh winds from the W by Thu night).

Tuesday
30
Wednesday
1
Thursday
2
Fri
3
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
0
0
1
0
1
1
0
0
0
0
1
0
0
1
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)
0.6
SE
10
0.6
SE
10
0.6
SE
9
0.5
SE
9
0.5
SE
9
0.5
SE
9
0.5
SE
9
0.5
SE
9
0.5
SE
9
0.4
ESE
10
0.6
ESE
9
0.6
ESE
9
0.6
ESE
9
0.5
ESE
9
0.4
ESE
9
0.4
ESE
9
0.4
ESE
9
1.2
SSW
5
1.6
SW
6
0.4
ESE
9
0.3
ESE
9
0.3
ESE
9
0.4
SE
9
0.3
ESE
9
Wave Graph
Metric surfscale
Energy kJ
58
58
52
41
41
41
41
41
41
36
55
55
54
46
31
31
31
59
184
30
16
15
20
16
Wind (km/h)
10
NE
10
ENE
10
SSE
10
SSW
10
SSW
5
WSW
5
NNW
5
N
5
NNE
5
ENE
15
SSE
5
SSW
5
SSW
10
WSW
10
W
5
W
5
S
15
SW
25
SW
25
SW
30
WSW
20
WSW
30
W
30
W
Wind State
cross
cross
on
cross-on
cross-on
cross-off
glassy
glassy
glassy
cross-on
on
cross-on
cross
cross-off
cross-off
glassy
glassy
cross
cross
cross
cross-off
cross-off
cross-off
cross-off
High Tide
4:35AM1.61m
6:37PM1.55m
5:15AM1.63m
7:07PM1.58m
5:57AM1.62m
7:39PM1.60m
Low Tide
11:46AM0.14m
11:57PM1.03m
12:19PM0.14m
00:36AM0.97m
12:54PM0.18m
1:19AM0.91m
clear
cloud
cloud
part cloud
clear
part cloud
clear
clear
clear
part cloud
cloud
cloud
cloud
cloud
light rain
light rain
mod rain
mod rain
thunderstorm
light rain
rain showers
part cloud
part cloud
cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
4:35
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
2
6
7
4
3
4
Temp °C
22
24
24
24
24
23
22
22
22
24
25
25
24
24
23
21
21
23
24
24
24
24
23
22
Feels °C
24
26
26
26
26
26
25
25
25
27
26
28
27
27
25
24
24
25
24
24
24
24
22
19
Swell 1
Height (m)
Direction
Period (s)
0.9
SW
8
0.7
SW
7
0.9
SSW
7
1
SSW
7
1
SSW
7
0.9
SSW
7
0.6
SW
7
0.9
SW
7
0.8
SSW
7
0.7
SW
7
0.7
SW
7
0.8
SSW
7
0.9
SW
7
0.5
ESE
9
0.8
SW
6
0.6
SW
6
0.4
ESE
9
0.4
ESE
9
0.4
ESE
9
0.4
ESE
9
0.3
ESE
9
2.2
SW
8
0.4
SE
9
0.3
ESE
9
Energy kJ
82
56
81
85
83
73
42
69
59
44
44
59
67
46
51
30
31
31
30
30
16
574
20
16
Swell 2
Height (m)
Direction
Period (s)
0.6
SE
10
0.6
SE
10
0.6
SE
9
0.5
SE
9
0.5
SE
9
0.5
SE
9
0.7
S
7
0.5
SE
9
0.5
SE
9
0.4
ESE
10
0.6
ESE
9
0.6
ESE
9
0.6
ESE
9
0.2
ESE
13
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
0.3
ESE
9
0.2
ESE
12
0.2
ESE
12
Energy kJ
58
58
52
41
41
41
45
41
41
36
55
55
54
17
31
31
16
16
16
15
15
15
15
14
Swell 3
Height (m)
Direction
Period (s)
0.2
ESE
14
0.2
ESE
14
0.2
ESE
14
0.2
ESE
14
0.2
ESE
14
0.2
ESE
13
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
0.3
ESE
13
0.2
ESE
13
0.2
ESE
13
0.2
ESE
12
0.2
ESE
12
Energy kJ
19
18
18
18
18
18
41
18
17
17
17
17
17
34
17
17
15
15
Wind waves
Height (m)
Direction
Period (s)
0.3
ENE
3
0.3
ESE
3
0.9
SW
7
0.4
WSW
3
0.6
SSW
6
1.2
SSW
5
1.6
SW
6
2.5
SW
7
2.5
SW
8
2.2
SW
8
2.3
SW
8
Energy kJ
2
2
65
5
24
59
184
677
776
619
632
Nearest Offshore or Glassy
Rating
(10 max)
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
3
2
1
1
1
Distance (km)
13
13
13
104
6
2
2
2
2
13
148
6
6
2
6
6
65
208
129
351
103
112
103
112
Best forecast wave conditions in Shizuoka
Rating
(10 max)
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
Best forecast wave conditions in Japan
Rating
(10 max)
1
1
1
1
1
1
2
2
1
1
1
1
1
1
1
1
1
1
1
3
3
2
4
2
Header Global
Rating
(10 max)
6
5
5
5
5
5
5
5
5
5
5
5
5
5
4
5
4
5
5
5
6
6
6
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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