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Surf Forecasts

Katagai surfForecast / Chiba / Japan

information circle12 Day Weather and Surf, issued 2 pm Wednesday 30 Apr 2025 JST
Forecast update in hr  min  s Forecast update imminent
Katagai surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Katagai sea temperature is
15.2° C
 (Which is 3.8°C colder than average for this time of year)

Best Forecast Surf Conditions for Katagai this week:

The surf forecast for Katagai over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Friday (May 02) at 9PM. The primary swell is predicted to be 1.8m and 8s period with a secondary swell of 0.2m and 10s. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Katagai in the next 12 days are 2.3m 8s and forecast to arrive on Friday (May 02) at 6PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.8m 5s period and expected on Saturday (May 03) at 12PM.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+) 9PM (Fri 2nd May)6ft (1.8m) 8s
Best Surf 9PM (Fri 2nd May)6ft (1.8m) 8s
Most Powerful 6PM (Fri 2nd May)7.5ft (2.3m) 8s

Table - best surf conditions forecast for Katagai over the next 12 days.

Hourly12 Days
Chiba Surf
Print Surf Table
Updates in  hr  min  s Forecast update imminent 
Wed
30
Thursday
01
Friday
02
Saturday
03
Sunday
04
Monday
05
Tuesday
06
Wednesday
07
Thursday
08
Friday
09
Saturday
10
Sunday
11
Mon
12
PMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAM
Rating
(10 max)
0
0
0
0
0
0
0
2
1
0
0
0
0
1
0
0
0
0
0
0
0
0
0
0
0
1
1
0
2
2
0
1
1
2
1
0
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
0.6
SE
0.5
SE
0.6
ESE
0.6
ESE
0.9
SSE
1.3
SE
1.8
SE
1.9
SE
1.8
SE
1.7
ESE
1.6
SE
1.2
ESE
1.5
S
0.8
ESE
0.7
ESE
0.6
ESE
0.6
ESE
0.5
ESE
0.5
ESE
0.5
ESE
0.5
ESE
0.5
ESE
0.5
ESE
0.8
SE
1.1
E
0.8
ESE
1
ESE
1.3
ESE
2.1
E
2
ESE
1.9
ESE
1.6
ESE
1.4
ESE
1.3
ESE
1.2
ESE
0.9
ESE
Period(s) (?)889856789999710101010109999988877899991099
Wave
Graph
(?)Metric surfscale
Energy (?)3630534844132325481492440456232200132967274515048464645771498793145593659605400348315259138
Wind
(km/h)
20
SSE
10
SSW
15
SSE
20
SSE
15
SSE
30
SE
20
SSE
10
WNW
10
NE
25
S
20
SW
30
SW
30
SW
5
NNW
20
NNW
25
SSW
20
S
15
SSE
20
SSE
15
SSE
20
SE
15
SSE
10
WNW
5
ESE
15
E
5
NNW
5
NNW
10
SSE
0
S
5
ENE
10
ESE
10
SE
5
E
5
NE
15
NNE
10
NE
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
on		cross-
on		cross-
on		cross-
on		ononcross-
on		offcrosscross-
on		crosscrosscrossglasscross-
off		crosscross-
on		cross-
on		cross-
on		onononoffcross-
on		cross-
on		glassglasscross-
on		glassglassononcross-
on		glasscross-
off		cross
High Tide
/ height (m)
6:52PM
1.32
4:50AM
1.55
7:50PM
1.23
5:22AM
1.50
9:02PM
1.15
5:57AM
1.42
10:43PM
1.12
6:37AM
1.29
12:11AM
1.13
7:40AM
1.15
12:48AM
1.15
10:30AM
1.04
1:13AM
1.19
12:39PM
1.05
1:35AM
1.23
1:53PM
1.11
1:56AM
1.26
2:46PM
1.19
2:16AM
1.30
3:30PM
1.25
2:36AM
1.34
4:10PM
1.30
2:57AM
1.37
Low Tide
/ height (m)
11:23PM
1.00
12:25PM
0.00
11:50PM
1.05
1:14PM
0.11
12:20AM
1.08
2:09PM
0.24
1:08AM
1.10
3:15PM
0.38
3:34AM
1.09
4:33PM
0.48
6:25AM
0.97
5:51PM
0.56
7:23AM
0.81
6:53PM
0.61
7:59AM
0.65
7:41PM
0.66
8:29AM
0.51
8:21PM
0.71
8:57AM
0.38
8:56PM
0.76
9:25AM
0.27
9:27PM
0.82
9:55AM
0.18
Wed
30
Thursday
01
Friday
02
Saturday
03
Sunday
04
Monday
05
Tuesday
06
Wednesday
07
Thursday
08
Friday
09
Saturday
10
Sunday
11
Mon
12
Sunrise--4:47--4:46--4:45--4:43--4:43--4:41--4:41--4:39--4:39--4:37--4:37--4:35
Sunset6:22--6:22--6:23--6:24--6:25--6:27--6:27--6:28--6:29--6:30--6:30--6:30--
clearclearclearclearpart cloudlight rainheavy rainrain showersclearclearpart cloudpart cloudclearclearclearclearpart cloudcloudlight rainmod rainlight raincloudpart cloudpart cloudcloudpart cloudcloudcloudlight rainpart cloudpart cloudcloudcloudheavy rainmod rainpart cloud
Rain (mm)
-----1111----------273-------2----128-
Temp. °C181718181718161617181822231520191718181718181819181819201819201920191619
Feels °C (?)131615141413131714131317181014121216151315172018171918191921211921211318

Short Range Forecast: Moderate rain (total 13mm), heaviest on Fri afternoon. Very mild (max 18°C on Wed afternoon, min 14°C on Fri night). Mainly fresh winds.

Days 3-6 Weather Summary Mostly dry. Warm (max 23°C on Sun afternoon, min 14°C on Sun night). Mainly fresh winds.

Days 6-9 Weather Summary Moderate rain (total 12mm), heaviest on Tue night. Very mild (max 19°C on Thu morning, min 16°C on Tue night). Wind will be generally light.

Long Range Forecast: Heavy rain (total 22mm), heaviest during Sun afternoon. Warm (max 20°C on Fri afternoon, min 15°C on Sun night). Wind will be generally light.

  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
<span class="translation_missing" title="translation missing: en.leaflet.map_placeholder_alt">Map Placeholder Alt</span>
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View detailed surf forecast for Katagai at:
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Information about the Katagai Surf forecast

The above surf forecast table for Katagai provides essential information for determining whether the surfing conditions will be good over the next 12 days. A general guide to surfing at Katagai can be found by selecting the local surf guide option on the grey menu. Our Katagai surf forecast is unique since it includes wave energy (power) that defines the real feel of the surf rather than just the height or the period. If you surf the same spot (Katagai) regularly then make a mental note of the wave energy from the surf forecast table each time you go. Very soon you may start to choose your surf days based on the wave energy alone combined with our forecast of favourable offshore wind conditions. Our star ratings will help here and of course you will also find the usual wave height and period predictions on our surf forecasts as well as a full break down of the swell components under our advanced users option (to reveal that, click the little Einstein character under the tide times).

Further information to help with frequently asked questions about our surf forecast for Katagai may be found under the help tab on the top menu and also by moving your mouse over the question marks on the surf forecast table itself. Please always bear in mind that the forecast is for near-shore open water and local factors at each surf break influence the actual breaking wave height, such as the beach / reef profile, water depths offshore and shelter.

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