Katahama Surf Break

Lat Long: 34.72° N 138.22° E

Katahama 48 hour detailed Surf Forecast

Issued: 8 am 17 Jul 2026 (local time)

Forecast update in  hr  min

Today's Katahama sea temperature is
25.3° C
0.9° 

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 (17 Jul):

  • Morning surf: Morning surf (17 Jul, local time) - 2ft (0.6m), 9s period with E swell.
  • Afternoon surf: Afternoon surf (17 Jul, local time) - 2ft (0.6m), 9s period with E swell.
  • Evening surf: Evening surf (17 Jul, local time) - 2ft (0.6m), 9s period with E swell.

The current surf forecast for Katahama at 12PM is: 0.6m 9s primary swell from a East direction (forecast issued at 08:00am July 17). An open ocean swell of 0.8m 7s is not directed at the surf break. The wind direction is predicted to be onshore.

Time (JST) & DateWave HeightWave Period
Morning (17 Jul)2ft (0.6m)9s
Afternoon (17 Jul)2ft (0.6m)9s
Evening (17 Jul)2ft (0.6m)9s

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


Short Range Forecast

Light rain (total 7mm), mostly falling on Fri night. Warm (max 29°C on Fri morning, min 25°C on Fri night). Wind will be generally light.

Friday
17
Saturday
18
Sunday
19
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)
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
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)
0.6
E
9
0.6
E
9
0.6
E
9
0.6
E
9
0.6
E
9
0.6
E
9
0.6
E
8
0.6
E
8
0.6
E
8
0.6
E
8
0.6
E
9
0.6
E
9
0.6
E
9
0.6
E
9
0.7
E
9
0.8
E
10
0.7
E
10
0.7
E
10
0.7
E
9
0.7
E
9
0.8
ESE
9
0.7
E
9
Wave Graph
Metric surfscale
Energy kJ
56
56
55
54
55
55
52
51
51
52
59
60
61
61
87
117
92
90
85
85
110
83
Wind (km/h)
5
ENE
10
ESE
15
SE
15
SE
15
ESE
15
ESE
15
ESE
15
ESE
15
ESE
15
ESE
15
SE
10
SE
10
SE
10
ESE
10
ESE
5
ESE
5
ESE
5
SE
10
S
15
S
10
SSW
5
SW
Wind State
cross
on
on
on
on
cross-on
on
cross-on
cross-on
cross-on
on
on
on
on
on
glassy
glassy
glassy
cross-on
cross-on
cross
cross
High Tide
6:18AM1.64m
7:38PM1.66m
7:02AM1.60m
8:10PM1.67m
7:49AM1.52m
8:44PM1.66m
Low Tide
1:03PM0.25m
1:32AM0.82m
1:38PM0.34m
2:16AM0.76m
2:14PM0.46m
clear
clear
part cloud
clear
part cloud
thunderstorm
rain showers
rain showers
rain showers
clear
part cloud
clear
clear
part cloud
rain showers
part cloud
cloud
part cloud
part cloud
part cloud
part cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
4:45
4:46
4:47
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:00
6:59
6:59
 mm
1
2
2
1
1
Temp °C
27
29
29
29
28
27
27
26
25
27
27
28
27
26
26
26
26
26
28
28
28
27
Feels °C
31
33
32
32
31
30
30
29
28
29
29
31
30
29
30
31
31
30
31
30
31
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.


Nearest locationNearest