Katahama Surf Break

Lat Long: 34.72° N 138.22° E

Katahama 48 hour detailed Surf Forecast

Issued: 8 pm 09 Jul 2026 (local time)

Forecast update in  hr  min

Today's Katahama sea temperature is
23.7° C
1.9° 

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 (10 Jul):

  • Morning surf: Morning surf (10 Jul, local time) - 8ft (2.5m), 15s period with S swell.
  • Afternoon surf: Afternoon surf (10 Jul, local time) - 2ft (0.6m), 10s period with E swell.
  • Evening surf: Evening surf (10 Jul, local time) - 1.5ft (0.4m), 8s period with E swell.

The current surf forecast for Katahama at 3AM is: 2.5m 15s primary swell from a South direction (forecast issued at 08:00pm July 09). An open ocean swell of 0.9m 20s is not directed at the surf break. The wind direction is predicted to be glassy and the swell rating is 4.

Time (JST) & DateWave HeightWave Period
Morning (10 Jul)8ft (2.5m)15s
Afternoon (10 Jul)2ft (0.6m)10s
Evening (10 Jul)1.5ft (0.4m)8s

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


Short Range Forecast

Mostly dry. Warm (max 27°C on Sat afternoon, min 23°C on Thu night). Wind will be generally light.

Thu
9
Friday
10
Saturday
11
Sunday
12
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
12 AM
3 AM
6 AM
9 AM
12 PM
3 PM
Rating
(10 max)
3
4
4
4
4
5
!
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
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
2.5
SSE
14
2.5
S
14
2.5
S
15
2.5
S
15
2.5
S
15
2.5
S
15
3
S
17
0.6
E
10
0.4
ESE
8
0.4
E
8
0.4
ESE
10
0.4
ESE
10
0.4
E
10
0.4
E
9
4
SSW
17
4
SSW
17
4
SSW
17
0.2
ESE
12
0.4
ESE
9
0.4
ESE
9
0.4
ESE
10
0.4
ESE
10
0.4
E
9
0.4
E
9
Wave Graph
Metric surfscale
Energy kJ
2410
2643
2753
2942
2863
2960
5803
67
21
20
32
31
29
28
0
0
0
14
34
34
36
39
26
26
Wind (km/h)
10
S
0
SSE
0
WNW
5
WNW
5
NNW
5
ESE
10
S
15
SSW
10
SSW
5
SSW
5
SW
5
W
5
WSW
10
SW
15
SW
20
SSW
15
SW
10
WSW
10
WSW
10
WSW
10
W
10
SSW
15
SW
15
SSW
Wind State
cross-on
glassy
glassy
glassy
glassy
glassy
cross-on
cross-on
cross-on
glassy
cross-off
glassy
glassy
cross
cross
cross
cross
cross-off
cross-off
cross-off
cross-off
cross
cross
cross
High Tide
1:05AM1.48m
4:01PM1.32m
2:02AM1.49m
4:50PM1.41m
2:51AM1.52m
Low Tide
6:53PM1.09m
8:44AM0.47m
8:28PM1.15m
9:36AM0.37m
9:42PM1.16m
10:18AM0.29m
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
clear
clear
part cloud
part cloud
part cloud
part cloud
part cloud
cloud
cloud
cloud
cloud
part cloud
cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
4:41
4:41
4:41
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:02
7:01
7:01
7:01
 mm
Temp °C
25
24
24
23
23
25
26
26
25
24
24
23
23
25
26
27
26
25
24
24
24
25
27
26
Feels °C
27
27
28
26
26
28
27
27
27
28
28
27
27
28
28
28
28
28
27
27
28
28
29
28
  • 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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