Katahama Surf Break

Katahama 48 hour detailed Surf Forecast

Lat Long: 34.72° N 138.22° E

Issued: 2 pm 01 Jul 2026 (local time)

Forecast update in  hr  min

Today's Katahama sea temperature is
22.9° C

1.7°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):

  • 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 (0.5m), 9s period with SE swell.

The current surf forecast for Katahama at 6PM is: 0.5m 9s primary swell from a Southeast direction and 0.2m 13s secondary swell from a East-southeast direction (forecast issued at 02:00pm July 01). An open ocean swell of 0.7m 6s is not directed at the surf break. The wind direction is predicted to be cross-offshore.

Time (JST) & DateWave HeightWave Period
Morning (01 Jul)--
Afternoon (01 Jul)1.5ft (0.5m)9s
Evening (01 Jul)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 32mm), heaviest during Wed night. Warm (max 26°C on Thu afternoon, min 21°C on Wed night). Winds decreasing (fresh winds from the SW on Thu morning, calm by Fri night).

Wed
1
Thursday
2
Friday
3
Sat
4
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
6 AM
9 AM
Rating
(10 max)
0
0
1
1
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
Height Map
Wave
Height (m)
Direction
Period (s)
0.5
SE
9
0.5
SE
9
0.5
SE
9
0.5
SE
9
0.4
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
0.4
SE
9
0.6
E
9
0.7
ESE
4
0.7
E
4
0.3
ESE
9
0.3
ESE
9
0.3
ESE
9
0.3
ESE
9
0.3
ESE
9
0.3
ESE
9
0.3
ESE
9
0.3
E
9
0.3
E
9
Wave Graph
Metric surfscale
Energy kJ
41
41
40
40
31
31
62
31
30
20
19
19
56
14
17
17
17
16
16
16
16
16
14
14
Wind (km/h)
10
S
10
SW
15
WSW
10
WSW
5
SSW
15
SSW
25
SW
35
SW
30
SW
20
WSW
15
WSW
10
NW
5
NE
10
E
10
E
10
NE
10
ENE
10
NE
5
ENE
5
E
5
ENE
5
NNE
5
ENE
5
E
Wind State
cross-on
cross
cross-off
cross-off
glassy
cross-on
cross
cross
cross
cross-off
cross-off
off
cross
cross-on
cross-on
cross
cross
cross
cross
glassy
glassy
glassy
glassy
cross-on
High Tide
7:07PM1.58m
5:57AM1.62m
7:39PM1.60m
6:41AM1.58m
8:13PM1.61m
7:29AM1.51m
Low Tide
12:19PM0.14m
00:36AM0.97m
12:54PM0.18m
1:19AM0.91m
1:31PM0.24m
2:07AM0.86m
cloud
cloud
cloud
cloud
mod rain
mod rain
thunderstorm
mod rain
thunderstorm
thunderstorm
thunderstorm
part cloud
cloud
light rain
light rain
cloud
cloud
cloud
part cloud
part cloud
part cloud
cloud
part cloud
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
6
10
4
6
2
1
1
1
1
Temp °C
24
25
23
22
21
22
24
24
24
25
26
24
22
21
21
21
21
21
22
22
22
21
21
23
Feels °C
26
27
24
24
24
24
24
22
24
27
29
27
25
22
22
22
22
22
24
24
25
23
23
25
Swell 1
Height (m)
Direction
Period (s)
0.7
SW
6
0.7
SSW
6
0.5
SE
9
0.7
SW
6
0.7
SW
6
0.4
ESE
9
0.4
ESE
9
0.4
ESE
9
0.4
ESE
9
0.4
SE
9
0.4
SE
9
0.4
SE
9
1.8
SW
8
1.6
SW
8
1.4
SW
8
1.3
SW
8
1.1
SW
8
1
SW
7
0.9
SW
7
0.9
SW
7
0.6
SW
7
0.6
SW
7
0.6
SSW
7
0.4
SW
7
Energy kJ
40
34
40
42
39
31
31
31
30
20
19
19
383
324
247
191
143
107
77
77
42
31
30
15
Swell 2
Height (m)
Direction
Period (s)
0.5
SE
9
0.5
SE
9
0.2
ESE
13
0.5
SE
9
0.4
ESE
9
0.2
ESE
13
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
0.3
ESE
9
0.3
ESE
9
0.4
S
5
0.4
S
5
0.3
E
9
0.3
E
9
Energy kJ
41
41
17
40
31
17
16
16
16
15
15
15
15
14
17
17
17
16
16
16
9
9
14
14
Swell 3
Height (m)
Direction
Period (s)
0.2
ESE
13
0.2
ESE
13
0.2
ESE
13
0.2
ESE
13
0.2
ESE
13
0.2
SSE
9
0.1
SE
9
0.1
SE
9
0.1
SE
9
0.2
ESE
12
0.1
SE
9
0.2
ESE
12
0.2
ESE
12
0.2
ESE
12
0.2
ESE
12
0.2
ESE
12
0.2
ESE
12
0.3
ESE
9
0.3
ESE
9
0.2
ESE
12
0.3
S
5
Energy kJ
17
17
17
17
17
8
3
3
3
15
3
14
14
14
14
14
14
16
16
14
5
Wind waves
Height (m)
Direction
Period (s)
0.7
SW
6
0.8
SSW
6
1.1
SW
5
2.3
SW
7
2.5
SW
7
2.5
SW
7
2.3
SW
8
2.1
SW
8
0.6
E
9
0.7
ESE
4
0.7
E
4
0.5
E
4
0.5
E
4
0.5
E
4
0.5
E
4
0.5
E
4
0.4
E
3
0.3
E
3
0.3
E
3
0.3
E
3
Energy kJ
40
42
62
437
677
641
601
489
56
14
16
7
7
7
7
6
4
2
2
2
Nearest Offshore or Glassy
Rating
(10 max)
1
1
1
1
1
1
2
1
2
3
2
3
1
1
1
1
1
1
1
1
1
1
1
1
Distance (km)
6
6
6
6
6
208
355
124
103
94
2
2
6
124
94
150
13
13
13
13
13
65
202
208
Best forecast wave conditions in Shizuoka
Rating
(10 max)
1
1
1
1
1
3
2
3
1
1
1
1
1
1
1
1
Best forecast wave conditions in Japan
Rating
(10 max)
1
1
1
1
1
2
2
1
2
3
3
3
2
2
2
2
1
1
1
1
1
1
1
1
Header Global
Rating
(10 max)
5
5
5
5
5
4
5
5
8
5
7
7
6
5
6
7
9
9
5
5
6
6
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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