Katahama Surf Break

Lat Long: 34.72° N 138.22° E

Katahama 48 hour detailed Surf Forecast

Issued: 8 am 08 Sep 2026 (local time)

Forecast update in  hr  min

Today's Katahama sea temperature is
27.1°C
0.0° 

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 (08 Sep):

  • Morning surf: Morning surf (08 Sep, local time) - 6.5ft (2.0m), 9s period with S swell.
  • Afternoon surf: Afternoon surf (08 Sep, local time) - 3.5ft (1.0m), 8s period with SE swell.
  • Evening surf: Evening surf (08 Sep, local time) - 1.5ft (0.4m), 10s period with SE swell.

The current surf forecast for Katahama at 2PM is: 1.0m 8s primary swell from a Southeast direction (forecast issued at 08:00am September 08). An open ocean swell of 1.8m 10s is not directed at the surf break. The wind direction is predicted to be cross-onshore.

Time (JST) & DateWave HeightWave Period
Morning (08 Sep)6.5ft (2.0m)9s
Afternoon (08 Sep)3.5ft (1.0m)8s
Evening (08 Sep)1.5ft (0.4m)10s

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


Short Range Forecast

Heavy rain (total 103mm), heaviest during Thu night. Warm (max 28°C on Tue morning, min 20°C on Thu night). Wind will be generally light.

Tuesday
8
Wednesday
9
Thursday
10
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)
3
3
2
0
0
0
0
0
0
0
0
0
0
0
0
1
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)
2.1
S
9
2
S
9
1.9
S
9
1
SE
8
0.9
SE
8
0.4
SE
10
0.3
E
9
0.3
E
9
0.4
ESE
10
0.3
ESE
10
0.2
E
17
0.2
E
17
0.2
E
16
0.2
E
16
0.2
E
16
2.1
S
8
1.2
E
5
1.1
E
6
1
E
6
1.5
S
8
1.4
S
8
1.3
S
8
Wave Graph
Metric surfscale
Energy kJ
716
637
586
125
107
25
13
14
32
18
23
22
21
21
21
625
82
74
69
304
258
223
Wind (km/h)
5
N
5
E
5
SE
10
SSE
5
SSE
10
SSW
10
WSW
15
WSW
20
SW
20
SW
25
SW
20
SW
15
SW
5
SSW
10
SSE
15
ENE
25
ENE
20
NE
20
NE
20
NE
20
NE
20
NE
Wind State
glassy
glassy
on
cross-on
cross-on
cross
cross-off
cross-off
cross
cross
cross
cross
cross
glassy
cross-on
cross
cross
cross
cross
cross
cross
cross
High Tide
4:35PM1.60m
3:41AM1.53m
4:55PM1.64m
4:20AM1.61m
5:12PM1.68m
Low Tide
9:47AM0.49m
10:29PM0.99m
10:23AM0.46m
10:52PM0.87m
10:53AM0.46m
rain showers
clear
thunderstorm
thunderstorm
thunderstorm
mod rain
thunderstorm
rain showers
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
heavy rain
light rain
light rain
light rain
light rain
light rain
cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:24
5:24
5:24
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:05
6:02
6:01
 mm
1
1
2
4
6
6
4
5
4
5
5
5
5
4
11
2
1
2
1
1
Temp °C
25
26
28
28
27
26
26
26
26
28
28
28
27
26
26
21
21
21
21
21
21
21
Feels °C
30
31
33
32
32
31
30
29
28
30
30
30
30
31
30
22
20
20
20
21
20
20
  • 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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