Katahama Surf Break

Lat Long: 34.72° N 138.22° E

Katahama 48 hour detailed Surf Forecast

Issued: 8 am 04 Aug 2026 (local time)

Forecast update in  hr  min

Today's Katahama sea temperature is
27.3° 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 (04 Aug):

  • Morning surf: Morning surf (04 Aug, local time) - 8ft (2.5m), 17s period with SE swell.
  • Afternoon surf: Afternoon surf (04 Aug, local time) - 10ft (3.0m), 16s period with ESE swell.
  • Evening surf: Evening surf (04 Aug, local time) - 11ft (3.5m), 16s period with ESE swell.

The current surf forecast for Katahama at 3PM is: 3.0m 16s primary swell from a East-southeast direction and 0.3m 14s secondary swell from a East direction (forecast issued at 08:00am August 04). An open ocean swell of 2.3m 7s is not directed at the surf break. The wind direction is predicted to be cross-onshore and the swell rating is 11.

Time (JST) & DateWave HeightWave Period
Morning (04 Aug)8ft (2.5m)17s
Afternoon (04 Aug)10ft (3.0m)16s
Evening (04 Aug)11ft (3.5m)16s

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


Short Range Forecast

Mostly dry. Warm (max 30°C on Thu morning, min 24°C on Tue morning). Wind will be generally light.

Tuesday
4
Wednesday
5
Thursday
6
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)
3
3
3
!
!
!
!
!
!
!
!
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)
2.3
SE
16
2.5
SE
17
2.5
SE
16
3
ESE
16
3.5
ESE
16
3.5
ESE
16
3.5
SE
16
3.5
SE
16
3.5
SE
15
3.5
SE
16
3.5
SE
16
4
SE
15
4
SE
15
4
SE
15
4
SE
14
3.5
SSE
14
3.5
SSE
14
3.5
SSE
14
3.5
SSE
15
4
SSE
15
3.5
SSE
14
3.5
S
14
Wave Graph
Metric surfscale
Energy kJ
2756
3538
3545
4905
5492
5392
6861
6128
6068
6378
6619
6432
6356
6186
5842
4511
4468
4988
5826
6019
5755
5491
Wind (km/h)
25
ENE
20
ENE
20
ENE
15
ENE
15
E
20
ENE
25
NE
20
NE
20
NE
25
NE
25
ENE
20
ENE
25
ENE
25
ENE
25
NE
20
NE
20
NE
25
ENE
20
E
25
ESE
25
ESE
20
E
Wind State
cross
cross
cross
cross-on
cross-on
cross-on
cross
cross
cross
cross
cross
cross-on
cross
cross
cross
cross
cross
cross
cross-on
on
cross-on
cross-on
High Tide
8:59AM1.40m
9:11PM1.64m
10:09AM1.28m
9:52PM1.58m
12:14PM1.20m
Low Tide
3:10AM0.65m
2:49PM0.75m
4:08AM0.65m
3:28PM0.92m
5:20AM0.65m
4:17PM1.09m
cloud
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
4:58
4:58
5:00
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:46
6:45
6:45
 mm
Temp °C
24
24
27
29
28
26
25
24
24
27
28
29
28
27
27
26
26
28
30
30
28
27
Feels °C
22
22
25
28
29
26
23
22
22
25
27
29
28
27
28
27
27
28
31
30
29
29
  • 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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