Katahama Surf Break

Lat Long: 34.72° N 138.22° E

Katahama 48 hour detailed Surf Forecast

Issued: 8 am 05 Sep 2026 (local time)

Forecast update in  hr  min

Today's Katahama sea temperature is
27.6°C
0.4° 

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 (05 Sep):

  • Morning surf: Morning surf (05 Sep, local time) - 3ft (0.9m), 5s period with E swell.
  • Afternoon surf: Afternoon surf (05 Sep, local time) - 4.5ft (1.4m), 6s period with E swell.
  • Evening surf: Evening surf (05 Sep, local time) - 5ft (1.6m), 6s period with E swell.

The current surf forecast for Katahama at 3PM is: 1.4m 6s primary swell from a East direction and 0.1m 13s secondary swell from a East direction (forecast issued at 08:00am September 05). An open ocean swell of 1.1m 10s is not directed at the surf break. The wind direction is predicted to be cross-shore.

Time (JST) & DateWave HeightWave Period
Morning (05 Sep)3ft (0.9m)5s
Afternoon (05 Sep)4.5ft (1.4m)6s
Evening (05 Sep)5ft (1.6m)6s

Table - waves today at Katahama. (Swell directed towards the surf break)


Short Range Forecast

Heavy rain (total 113mm), heaviest during Sun night. Warm (max 24°C on Sat afternoon, min 20°C on Sun afternoon). Winds decreasing (strong winds from the ENE on Sun morning, calm by Mon afternoon).

Saturday
5
Sunday
6
Monday
7
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
Rating
(10 max)
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
Wave
Height (m)
Direction
Period (s)
0.4
SE
9
0.9
E
5
1
E
6
1.4
E
6
1.5
E
6
1.6
E
6
1.9
E
6
2.1
E
7
0.3
S
8
0.2
S
8
0.1
E
15
0.5
S
10
0.8
S
10
1.3
S
10
2.3
S
10
3
S
10
3
SSE
10
3
SSE
10
3.5
SSE
10
3.5
SSE
10
3.5
SSE
10
3
SSE
10
Wave Graph
Metric surfscale
Energy kJ
27
42
74
148
165
170
272
388
12
6
4
46
122
320
1055
1555
2016
1941
2216
2561
2210
1844
Wind (km/h)
15
NNE
15
NE
15
NE
15
ENE
20
NE
25
ENE
30
ENE
35
ENE
40
ENE
45
ENE
40
ENE
40
NE
40
NE
45
NE
35
NE
35
NNE
25
NE
15
NE
10
NE
10
N
5
WNW
10
WSW
Wind State
cross-off
cross
cross
cross
cross
cross
cross
cross
cross-on
cross
cross
cross
cross
cross
cross
cross-off
cross
cross
cross
cross-off
glassy
cross-off
High Tide
2:56PM1.34m
11:09PM1.37m
3:44PM1.45m
1:35AM1.37m
4:12PM1.54m
Low Tide
6:01AM0.65m
6:23PM1.30m
7:46AM0.62m
9:15PM1.22m
8:59AM0.55m
heavy rain
light rain
cloud
light rain
part cloud
part cloud
part cloud
cloud
cloud
cloud
light rain
light rain
light rain
mod rain
heavy rain
heavy rain
rain showers
light rain
mod rain
heavy rain
light rain
cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:22
5:22
5:22
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:08
6:07
6:06
 mm
11
3
1
2
5
5
7
26
14
5
4
7
26
1
Temp °C
21
22
23
23
24
24
24
23
23
23
23
22
20
21
20
21
22
22
23
24
24
24
Feels °C
22
23
24
24
24
23
21
19
17
17
17
17
14
16
16
18
21
24
26
27
29
28
  • 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
How to use the Wavefinder 

FREE! Surf-Forecast.com widget for your website

The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Katahama surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.


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