Katahama Surf Break

Lat Long: 34.72° N 138.22° E

Katahama 48 hour detailed Surf Forecast

Issued: 8 pm 03 Sep 2026 (local time)

Forecast update in  hr  min

Today's Katahama sea temperature is
26.8°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):

  • Morning surf: Morning surf (04 Sep, local time) - 1.5ft (0.5m), 9s period with SE swell.
  • 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 5AM is: 0.5m 10s primary swell from a East direction (forecast issued at 08:00pm September 03). An open ocean swell of 1.1m 10s is not directed at the surf break, a second open ocean swell of 0.4m 3s is not directed at the surf break. The wind direction is predicted to be offshore.

Time (JST) & DateWave HeightWave Period
Morning (04 Sep)1.5ft (0.5m)9s
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 32mm), heaviest during Fri night. Warm (max 27°C on Thu night, min 21°C on Fri night). Winds increasing (calm on Fri afternoon, strong winds from the ENE by Sun afternoon).

Thu
3
Friday
4
Saturday
5
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
1
1
1
0
1
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
Wave
Height (m)
Direction
Period (s)
0.6
E
10
0.6
E
10
0.5
E
10
0.5
E
10
0.4
E
10
0.5
SE
9
0.4
E
9
0.4
E
9
0.4
SE
6
0.4
E
9
0.4
E
9
0.4
SE
9
0.5
E
9
1
E
6
1.2
E
6
1.6
E
6
0.1
E
13
0.3
S
8
Wave Graph
Metric surfscale
Energy kJ
69
69
48
47
30
41
27
27
10
27
26
26
41
66
102
187
3
12
Wind (km/h)
15
WSW
10
W
5
N
5
NW
5
NW
5
NE
10
E
5
NW
20
NNW
15
N
15
NNE
15
NE
15
NE
20
NE
25
NE
30
NE
25
ENE
30
ENE
Wind State
cross-off
cross-off
cross-off
off
glassy
glassy
cross-on
glassy
off
cross-off
cross-off
cross-off
cross
cross
cross
cross
cross
cross
High Tide
8:51PM1.59m
11:47AM1.25m
9:34PM1.48m
2:56PM1.34m
Low Tide
4:27AM0.62m
3:30PM1.19m
6:01AM0.65m
6:23PM1.30m
part cloud
thunderstorm
thunderstorm
cloud
cloud
cloud
cloud
thunderstorm
light rain
light rain
mod rain
mod rain
light rain
light rain
light rain
cloud
part cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:20
5:22
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:12
6:09
6:08
 mm
1
1
2
2
5
10
7
1
1
2
Temp °C
28
27
25
25
25
26
27
26
22
21
21
21
22
22
23
23
23
23
Feels °C
30
30
29
29
28
30
30
30
22
22
22
21
23
22
22
21
21
19
  • 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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