Katahama Surf Break

Katahama 48 hour detailed Surf Forecast

Lat Long: 34.72° N 138.22° E

Issued: 8 pm 18 Jun 2026 (local time)

Forecast update in  hr  min

Today's Katahama sea temperature is
21.3° C

2.2°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 (19 Jun):

  • Morning surf: Morning surf (19 Jun, local time) - 2ft (0.6m), 6s period with SSE swell.
  • Afternoon surf: Afternoon surf (19 Jun, local time) - 1ft (0.3m), 10s period with SE swell.
  • Evening surf: Evening surf (19 Jun, local time) - 1ft (0.3m), 10s period with SE swell.

The current surf forecast for Katahama at 4AM is: 0.2m 11s primary swell from a South-southeast direction (forecast issued at 08:00pm June 18). An open ocean swell of 1.5m 8s is not directed at the surf break. The wind direction is predicted to be cross-shore.

Time (JST) & DateWave HeightWave Period
Morning (19 Jun)2ft (0.6m)6s
Afternoon (19 Jun)1ft (0.3m)10s
Evening (19 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 48mm), heaviest during Sat night. Warm (max 29°C on Sun afternoon, min 21°C on Thu night). Winds increasing (calm on Thu night, fresh winds from the WSW by Sun afternoon).

Thu
18
Friday
19
Saturday
20
Sunday
21
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
0
1
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)
0.1
SE
15
0.2
E
10
0.8
SSE
7
0.2
SSE
11
0.7
SSE
6
0.6
SSE
6
0.6
SSE
6
0.5
SE
6
0.3
SE
10
0.3
SE
10
0.3
SE
10
0.3
SE
10
0.3
SE
10
0.3
SE
10
0.4
SE
10
0.4
SE
10
0.4
SE
10
0.4
SE
10
0.4
SE
10
0.3
SE
9
0.3
SE
9
0.3
SE
9
0.4
SE
9
0.3
SE
11
Wave Graph
Metric surfscale
Energy kJ
9
8
57
11
33
28
22
16
16
16
15
15
15
15
24
24
24
24
43
14
13
13
21
19
Wind (km/h)
20
WSW
15
WSW
10
W
5
NNE
5
NE
10
ESE
10
SE
10
SE
10
SE
5
ESE
5
ESE
5
NE
5
ENE
10
E
10
ESE
10
ESE
10
ESE
15
SE
15
SSW
20
SW
20
SW
10
W
25
WSW
30
WSW
Wind State
cross-off
cross-off
cross-off
glassy
cross
cross-on
on
on
on
on
on
glassy
cross
cross-on
cross-on
on
cross-on
on
cross-on
cross
cross
cross-off
cross-off
cross-off
High Tide
8:11PM1.54m
7:06AM1.51m
8:52PM1.54m
7:58AM1.41m
9:38PM1.52m
9:00AM1.30m
Low Tide
1:49AM0.93m
2:02PM0.26m
2:47AM0.90m
2:47PM0.38m
3:51AM0.85m
clear
clear
clear
clear
clear
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
cloud
cloud
cloud
light rain
light rain
light rain
mod rain
mod rain
light rain
mod rain
rain showers
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
4:33
4:33
4:33
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:01
7:01
7:02
7:02
 mm
1
4
5
10
9
4
9
6
Temp °C
24
22
22
21
22
23
23
24
23
23
23
22
23
23
23
22
21
21
22
22
23
23
28
29
Feels °C
24
23
25
24
25
25
25
26
25
26
26
25
26
25
26
24
23
22
24
23
24
26
27
27
Swell 1
Height (m)
Direction
Period (s)
0.1
SE
15
1.7
SSW
8
0.8
SSE
7
1.5
SSW
8
1.1
SW
8
0.9
SW
8
0.8
SW
8
0.8
SW
7
0.9
SSW
7
0.8
SW
7
0.7
SW
7
0.8
SW
7
0.7
SW
7
0.7
SW
7
0.7
SW
7
0.8
SW
7
0.7
SW
7
0.6
SW
6
0.4
SE
10
0.3
SE
9
0.3
SE
9
0.3
SE
9
0.4
SE
9
0.3
SE
9
Energy kJ
9
388
57
292
157
96
79
65
90
59
47
57
47
49
49
55
44
31
23
14
13
13
21
13
Swell 2
Height (m)
Direction
Period (s)
0.1
SE
15
0.2
E
10
0.3
SE
11
0.2
SSE
11
0.7
SSE
6
0.6
SSE
6
0.6
SSE
6
0.5
SE
6
0.3
SE
10
0.3
SE
10
0.3
SE
10
0.3
SE
10
0.3
SE
10
0.3
SE
10
0.4
SE
10
0.4
SE
10
0.4
SE
10
0.4
SE
10
0.3
E
5
0.2
SSE
12
0.2
SSE
11
0.2
E
9
0.2
SSE
11
0.3
E
9
Energy kJ
9
8
19
11
33
28
22
15
16
16
15
15
15
15
24
24
24
24
4
13
13
7
12
16
Swell 3
Height (m)
Direction
Period (s)
0.3
ENE
10
0.1
SE
11
0.1
E
9
0.1
E
10
0.2
SSE
11
0.2
ESE
8
0.3
SE
10
0.3
SE
10
0.3
E
8
0.3
SSE
5
0.3
SSE
5
0.2
E
9
0.3
SE
5
0.2
E
9
0.1
SE
13
0.1
SE
12
0.1
SE
12
0.2
E
9
0.2
E
9
0.2
E
9
0.2
E
9
0.2
SSE
11
0.2
ENE
10
0.3
SE
11
Energy kJ
18
5
2
2
11
6
16
16
12
5
5
6
3
6
6
6
6
6
6
6
7
12
9
19
Wind waves
Height (m)
Direction
Period (s)
1.9
SSW
9
0.7
WSW
4
1.4
SW
8
0.3
ESE
4
0.7
SE
4
1
SSW
4
1.8
SW
7
2.1
SW
7
2
SW
8
1.8
SW
8
1.8
SW
8
Energy kJ
575
14
264
3
13
43
271
470
432
383
435
Nearest Offshore or Glassy
Rating
(10 max)
2
2
3
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
2
3
2
3
1
1
Distance (km)
65
2
2
2
2
13
13
105
13
2
13
13
13
13
13
13
13
355
355
351
94
2
65
124
Best forecast wave conditions in Shizuoka
Rating
(10 max)
2
2
3
1
2
1
1
1
1
1
1
1
1
1
1
1
2
3
1
Best forecast wave conditions in Japan
Rating
(10 max)
3
2
3
2
2
1
1
1
1
1
1
1
1
1
1
1
1
3
3
4
3
3
1
3
Header Global
Rating
(10 max)
9
9
5
5
5
5
5
6
6
7
5
4
7
6
5
5
4
5
5
5
5
9
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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