Katahama Surf Break

Lat Long: 34.72° N 138.22° E

Katahama 48 hour detailed Surf Forecast

Issued: 2 am 06 Sep 2026 (local time)

Forecast update in  hr  min

Today's Katahama sea temperature is
27.3°C
0.1° 

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 (06 Sep):

  • Morning surf: Morning surf (06 Sep, local time) - 0.5ft (0.2m), 8s period with S swell.
  • Afternoon surf: Afternoon surf (06 Sep, local time) - 2ft (0.6m), 9s period with S swell.
  • Evening surf: Evening surf (06 Sep, local time) - 4ft (1.2m), 9s period with S swell.

The current surf forecast for Katahama at 7AM is: 0.1m 12s primary swell from a Southeast direction (forecast issued at 02:00am September 06). An open ocean swell of 0.4m 9s is not directed at the surf break, a second open ocean swell of 0.2m 8s is not directed at the surf break, a second open ocean swell of 2.3m 7s is not directed at the surf break. The wind direction is predicted to be cross-shore.

Time (JST) & DateWave HeightWave Period
Morning (06 Sep)0.5ft (0.2m)8s
Afternoon (06 Sep)2ft (0.6m)9s
Evening (06 Sep)4ft (1.2m)9s

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


Short Range Forecast

Heavy rain (total 181mm), heaviest during Sun night. Warm (max 26°C on Tue afternoon, min 20°C on Sun afternoon). Winds decreasing (strong winds from the NE on Sun morning, calm by Mon night).

Sunday
6
Monday
7
Tuesday
8
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
6 PM
9 PM
Rating
(10 max)
0
0
0
0
0
0
0
0
0
1
2
3
4
!
!
4
3
3
2
2
2
0
1
2
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)
1.8
E
6
2
E
6
0.1
SE
12
0.2
S
8
0.1
SE
15
0.6
S
9
0.9
S
9
1.2
S
9
1.3
S
9
2.4
E
8
2.1
S
10
2.4
S
10
2.5
S
9
3
SSE
9
3
S
9
2.5
S
9
2.4
S
9
2.2
S
9
1.7
S
8
2
S
9
1.9
S
9
0.4
SE
10
1.1
SE
8
1.1
SE
8
Wave Graph
Metric surfscale
Energy kJ
237
321
6
6
8
62
142
235
288
765
821
1279
1163
1779
1553
1225
950
792
412
621
575
35
180
176
Wind (km/h)
30
ENE
40
ENE
45
ENE
40
NE
45
NE
45
NE
35
NE
35
NE
35
NE
35
NE
15
NE
5
E
10
NNE
10
NE
5
SSE
10
WSW
10
W
5
W
0
N
5
ENE
10
NE
10
NE
10
ENE
5
NE
Wind State
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross-on
cross-off
cross-off
glassy
cross-off
cross-off
glassy
glassy
cross
cross
cross
cross
glassy
High Tide
11:09PM1.37m
3:44PM1.45m
1:35AM1.37m
4:12PM1.54m
2:51AM1.44m
4:35PM1.60m
Low Tide
7:46AM0.62m
9:15PM1.22m
8:59AM0.55m
10:00PM1.10m
9:47AM0.49m
cloud
light rain
light rain
light rain
light rain
heavy rain
heavy rain
light rain
light rain
mod rain
heavy rain
heavy rain
heavy rain
rain showers
light rain
light rain
rain showers
light rain
light rain
light rain
thunderstorm
thunderstorm
thunderstorm
rain showers
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:22
5:22
5:24
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:07
6:06
6:05
 mm
1
1
1
4
15
16
4
2
6
65
28
13
4
3
3
1
1
2
2
1
1
1
2
Temp °C
24
23
23
23
22
21
20
21
21
21
22
23
23
24
24
25
24
24
24
25
25
26
26
25
Feels °C
21
18
17
17
16
16
17
17
18
18
23
27
26
28
29
29
28
28
29
30
29
30
31
30
  • 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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