Katahama Surf Break

Lat Long: 34.72° N 138.22° E

Katahama 48 hour detailed Surf Forecast

Issued: 2 pm 04 Sep 2026 (local time)

Forecast update in  hr  min

Today's Katahama sea temperature is
27.6°C
0.4° 

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 Sep):

  • Afternoon surf: Afternoon surf (04 Sep, local time) - 1.5ft (0.4m), 9s period with E swell.
  • Evening surf: Evening surf (04 Sep, local time) - 1.5ft (0.4m), 9s period with E swell.

The current surf forecast for Katahama at 6PM is: 0.4m 6s primary swell from a East-southeast direction and 0.4m 3s secondary swell from a East-northeast direction (forecast issued at 02:00pm September 04). An open ocean swell of 0.9m 9s is not directed at the surf break, a second open ocean swell of 0.7m 11s is not directed at the surf break. The wind direction is predicted to be glassy.

Time (JST) & DateWave HeightWave Period
Morning (04 Sep)--
Afternoon (04 Sep)1.5ft (0.4m)9s
Evening (04 Sep)1.5ft (0.4m)9s

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


Short Range Forecast

Heavy rain (total 145mm), heaviest during Sun night. Warm (max 26°C on Fri afternoon, min 21°C on Fri night). Winds increasing (calm on Fri afternoon, strong winds from the NE by Sun morning).

Fri
4
Saturday
5
Sunday
6
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
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)
0.4
E
9
0.4
E
9
0.4
ESE
6
0.4
E
9
0.4
E
9
0.4
SE
9
0.4
SE
9
0.9
E
5
1.4
E
6
1.4
E
6
0.1
E
13
0.4
S
8
0.3
S
8
0.1
SE
12
0.3
S
8
0.2
S
8
0.3
SSE
8
0.4
S
9
0.7
S
10
1.3
S
10
Wave Graph
Metric surfscale
Energy kJ
27
27
16
27
26
28
27
37
125
148
3
20
11
6
12
6
13
28
89
374
Wind (km/h)
10
E
0
NW
5
NNW
10
NE
15
NNW
15
NNE
20
NE
15
NE
15
NE
20
ENE
25
NE
30
ENE
30
NE
35
NE
40
NE
45
NE
45
NE
45
NE
45
NE
40
NE
Wind State
cross-on
glassy
glassy
cross
cross-off
cross-off
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
High Tide
11:47AM1.25m
9:34PM1.48m
2:56PM1.34m
11:09PM1.37m
3:44PM1.45m
Low Tide
3:30PM1.19m
6:01AM0.65m
6:23PM1.30m
7:46AM0.62m
cloud
cloud
cloud
cloud
light rain
heavy rain
mod rain
light rain
cloud
cloud
cloud
cloud
cloud
cloud
cloud
light rain
light rain
mod rain
mod rain
heavy rain
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:22
5:22
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:09
6:08
6:07
 mm
1
11
10
1
3
4
7
9
12
Temp °C
26
26
26
26
22
21
22
22
23
24
23
23
23
24
24
22
21
21
21
21
Feels °C
29
30
30
29
22
22
22
23
23
24
21
20
19
19
19
16
15
15
15
16
  • 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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