Katahama Surf Break

Lat Long: 34.72° N 138.22° E

Katahama 48 hour detailed Surf Forecast

Issued: 2 pm 05 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 (05 Sep):

  • Afternoon surf: Afternoon surf (05 Sep, local time) - 4.5ft (1.3m), 6s period with E swell.
  • Evening surf: Evening surf (05 Sep, local time) - 5.5ft (1.7m), 6s period with E swell.

The current surf forecast for Katahama at 11PM is: 1.8m 6s primary swell from a East direction and 0.3m 8s secondary swell from a South direction (forecast issued at 02:00pm September 05). An open ocean swell of 0.8m 9s is not directed at the surf break. The wind direction is predicted to be cross-shore.

Time (JST) & DateWave HeightWave Period
Morning (05 Sep)--
Afternoon (05 Sep)4.5ft (1.3m)6s
Evening (05 Sep)5.5ft (1.7m)6s

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


Short Range Forecast

Heavy rain (total 170mm), heaviest during Sun night. Warm (max 26°C on Mon morning, min 20°C on Sun afternoon). Winds decreasing (strong winds from the NE on Sun night, calm by Mon night).

Sat
5
Sunday
6
Monday
7
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)
1
E
6
1.3
E
6
1.5
E
6
1.7
E
6
1.9
E
6
2
E
6
2.2
E
7
0.2
S
8
0.1
SE
15
0.5
S
10
0.9
S
10
1.2
S
9
3
E
8
2.2
S
10
4
SSE
10
3.5
S
10
3.5
S
10
3.5
S
10
3
SSE
10
3
SSE
10
Wave Graph
Metric surfscale
Energy kJ
74
137
165
191
263
321
0
6
8
46
148
246
1082
1048
2777
2250
2316
2124
1941
2010
Wind (km/h)
15
NE
15
ENE
15
ENE
25
ENE
30
ENE
35
ENE
40
ENE
40
ENE
40
NE
35
NE
40
NE
45
NE
40
NE
45
NE
25
NE
10
ESE
30
S
10
SSW
5
N
0
NW
Wind State
cross
cross
cross
cross
cross
cross
cross-on
cross
cross
cross
cross
cross
cross
cross
cross
cross-on
cross-on
cross
cross-off
glassy
High Tide
2:56PM1.34m
11:09PM1.37m
3:44PM1.45m
1:35AM1.37m
4:12PM1.54m
Low Tide
6:23PM1.30m
7:46AM0.62m
9:15PM1.22m
8:59AM0.55m
cloud
cloud
part cloud
cloud
cloud
cloud
cloud
light rain
light rain
mod rain
heavy rain
light rain
heavy rain
heavy rain
heavy rain
heavy rain
thunderstorm
mod rain
mod rain
light rain
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:22
5:22
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:08
6:07
6:06
 mm
2
5
9
11
5
11
20
51
18
14
7
6
4
Temp °C
23
23
24
24
23
23
23
22
21
20
20
21
20
21
21
23
26
26
25
25
Feels °C
24
24
24
23
19
19
18
16
16
16
15
16
15
16
20
26
27
30
30
31
  • 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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