Katahama Surf Break

Lat Long: 34.72° N 138.22° E

Katahama 48 hour detailed Surf Forecast

Issued: 2 am 30 Jul 2026 (local time)

Forecast update in  hr  min

Today's Katahama sea temperature is
27.2° 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 (30 Jul):

  • Morning surf: Morning surf (30 Jul, local time) - 1ft (0.3m), 10s period with SE swell.
  • Afternoon surf: Afternoon surf (30 Jul, local time) - 1ft (0.3m), 10s period with SE swell.
  • Evening surf: Evening surf (30 Jul, local time) - 0.5ft (0.2m), 12s period with ESE swell.

The current surf forecast for Katahama at 6AM is: 0.3m 10s primary swell from a Southeast direction (forecast issued at 02:00am July 30). An open ocean swell of 0.3m 8s is not directed at the surf break, a second open ocean swell of 1.0m 6s is not directed at the surf break. The wind direction is predicted to be offshore.

Time (JST) & DateWave HeightWave Period
Morning (30 Jul)1ft (0.3m)10s
Afternoon (30 Jul)1ft (0.3m)10s
Evening (30 Jul)0.5ft (0.2m)12s

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


Short Range Forecast

Mostly dry. Warm (max 34°C on Thu afternoon, min 27°C on Fri night). Wind will be generally light.

Thursday
30
Friday
31
Saturday
1
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
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
0
0
0
0
0
1
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)
0.4
SE
10
0.3
SE
10
0.3
SE
10
0.3
SE
10
0.3
SE
10
0.3
SE
10
0.2
ESE
10
0.2
ESE
12
0.3
ESE
9
0.3
ESE
9
0.3
ESE
9
0.4
SE
9
0.4
SE
9
0.3
ESE
9
1.1
SW
5
0.3
ESE
9
0.2
ESE
9
0.2
ESE
9
0.2
E
11
0.2
ESE
15
0.3
E
11
0.3
SE
17
0.5
SE
16
0.5
SE
16
Wave Graph
Metric surfscale
Energy kJ
23
14
14
14
14
15
9
15
17
17
17
22
22
17
65
17
8
8
9
22
22
46
125
125
Wind (km/h)
10
NW
5
WNW
10
WNW
15
W
10
WSW
20
WSW
25
WSW
10
W
5
NNW
5
WNW
5
WNW
5
ESE
10
SSE
10
SSE
10
SSW
5
ESE
10
NE
10
NNE
5
NNE
5
S
15
S
15
S
10
S
5
S
Wind State
off
cross-off
off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
off
glassy
glassy
cross-on
cross-on
cross
glassy
cross
cross-off
glassy
cross-on
cross-on
cross-on
cross-on
glassy
High Tide
5:17AM1.66m
6:40PM1.67m
5:56AM1.68m
7:05PM1.70m
6:37AM1.67m
7:32PM1.72m
Low Tide
11:55PM0.96m
12:06PM0.25m
00:26AM0.86m
12:36PM0.29m
1:00AM0.78m
1:07PM0.36m
clear
part cloud
part cloud
part cloud
part cloud
part cloud
clear
clear
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
clear
clear
clear
clear
clear
clear
clear
part cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
4:54
4:54
4:56
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:51
6:51
6:50
 mm
Temp °C
28
28
27
31
33
34
32
31
29
28
28
29
31
31
30
29
28
27
28
30
30
30
30
29
Feels °C
30
30
28
32
35
35
31
33
33
31
32
33
34
33
34
34
32
30
32
34
31
32
33
34
  • 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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