Katahama Surf Break

Lat Long: 34.72° N 138.22° E

Katahama 48 hour detailed Surf Forecast

Issued: 8 pm 07 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) - 3ft (0.9m), 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 1AM is: 2.4m 9s primary swell from a South direction (forecast issued at 08:00pm September 07). An open ocean swell of 0.5m 9s is not directed at the surf break. The wind direction is predicted to be glassy and the swell rating is 3.

Time (JST) & DateWave HeightWave Period
Morning (08 Sep)6.5ft (2.0m)9s
Afternoon (08 Sep)3ft (0.9m)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 74mm), heaviest during Tue night. Warm (max 28°C on Tue morning, min 21°C on Thu morning). Wind will be generally light.

Mon
7
Tuesday
8
Wednesday
9
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)
4
3
2
3
3
2
2
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)
2.5
S
9
2.5
S
9
2.4
S
9
2.3
S
9
2.1
S
9
2
S
9
1.9
S
9
0.9
SE
8
0.9
SE
8
0.4
SE
10
0.3
E
9
0.3
E
9
0.3
E
9
0.3
ESE
10
0.2
E
17
0.2
E
17
0.2
E
16
0.2
E
16
Wave Graph
Metric surfscale
Energy kJ
1210
1041
950
865
716
649
586
109
107
25
13
13
13
18
23
22
21
21
Wind (km/h)
10
NNE
10
NE
5
NE
5
NNE
5
NE
5
ENE
5
SE
10
SSE
5
SSE
15
SSW
15
SSW
20
SW
20
WSW
20
SW
25
SW
20
SW
10
SW
5
SSW
Wind State
cross-off
cross
cross
glassy
glassy
cross-on
on
cross-on
cross-on
cross-on
cross
cross
cross-off
cross
cross
cross
cross
glassy
High Tide
4:12PM1.54m
2:51AM1.44m
4:35PM1.60m
3:41AM1.53m
4:55PM1.64m
Low Tide
10:00PM1.10m
9:47AM0.49m
10:29PM0.99m
10:23AM0.46m
light rain
light rain
light rain
rain showers
rain showers
clear
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:24
5:24
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:06
6:05
6:02
 mm
3
4
4
4
1
1
1
3
4
7
8
6
4
3
2
3
4
Temp °C
24
24
24
24
24
26
28
28
27
27
27
27
26
27
28
28
28
26
Feels °C
28
27
28
28
28
30
33
32
32
31
30
29
28
29
30
31
32
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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