Surf Break

Lat Long: 34.72° N 138.22° E

Katahama 48 hour detailed Surf Forecast

Issued: 8 pm 25 Sep 2026 (local time)

Forecast update in  hr  min

Today's Katahama sea temperature is
25.5°C
0.3° 

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 (26 Sep):

  • Morning surf: Morning surf (26 Sep, local time) - 1ft (0.3m), 8s period with E swell.
  • Afternoon surf: Afternoon surf (26 Sep, local time) - 2.5ft (0.8m), 5s period with E swell.
  • Evening surf: Evening surf (26 Sep, local time) - 1.5ft (0.4m), 10s period with E swell.

The current surf forecast for Katahama at 4AM is: 0.3m 8s primary swell from a East direction and 0.3m 4s secondary swell from a East-southeast direction, 0.2m 2s secondary swell from a South-southwest direction (forecast issued at 08:00pm September 25). The wind direction is predicted to be glassy.

Time (JST) & DateWave HeightWave Period
Morning (26 Sep)1ft (0.3m)8s
Afternoon (26 Sep)2.5ft (0.8m)5s
Evening (26 Sep)1.5ft (0.4m)10s

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


Short Range Forecast

Moderate rain (total 11mm), heaviest on Fri night. Warm (max 24°C on Fri night, min 19°C on Sat night). Wind will be generally light.

Fri
25
Saturday
26
Sunday
27
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
0
0
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.3
E
9
0.3
E
10
0.3
E
8
0.3
E
8
0.3
E
8
0.3
E
8
0.3
E
10
0.8
E
5
0.9
E
5
0.4
E
10
0.3
E
10
0.8
ENE
5
0.3
E
10
0.3
E
10
0.3
E
10
0.3
E
10
0.7
E
4
0.3
E
9
Wave Graph
Metric surfscale
Energy kJ
15
17
13
12
13
12
17
27
45
30
17
39
17
17
17
16
12
15
Wind (km/h)
10
SE
5
SE
0
NNW
5
N
5
N
5
NE
10
E
15
NE
20
NE
15
NE
15
NE
15
ENE
15
NE
10
NE
10
NE
10
E
5
E
10
NE
Wind State
on
glassy
glassy
glassy
cross-off
cross
cross-on
cross
cross
cross
cross
cross
cross
cross
cross
cross-on
cross-on
cross
High Tide
4:59PM1.70m
5:09AM1.68m
5:19PM1.74m
5:43AM1.70m
5:40PM1.78m
Low Tide
11:13PM0.60m
11:17AM0.59m
11:38PM0.50m
11:42AM0.64m
thunderstorm
rain showers
light rain
light rain
cloud
cloud
light rain
light rain
cloud
cloud
cloud
light rain
light rain
cloud
part cloud
cloud
light rain
cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
—
—
—
5:37
—
—
—
—
—
—
—
5:37
—
—
—
—
—
—
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
—
—
—
—
—
—
—
5:38
—
—
—
—
—
—
—
5:37
—
—
 mm
1
2
1
1
—
—
1
1
—
—
—
2
1
—
—
—
2
—
Temp °C
24
24
24
23
23
23
24
21
20
19
20
19
19
20
21
23
21
21
Feels °C
26
27
27
26
26
25
25
21
19
18
20
19
19
20
21
24
23
23
  • 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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