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Surf Forecasts:

Choshi surfForecast / Chiba / Japan

information circle16 Day Weather and Surf, issued 2 am Tuesday 17 Mar 2026 JST
Forecast update in hr  min  s Forecast update imminent
Choshi surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Choshi sea temperature is
15.1° C
 (Which is 1.2°C colder than average for this time of year)

Best Forecast Surf Conditions for Choshi this week:

The surf forecast for Choshi over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Thursday (Mar 19) at 9AM. The primary swell is predicted to be 1.6m and 14s period with a secondary swell of 1.1m and 7s. The wind is predicted to be offshore as the swell arrives.

The most powerful waves expected at Choshi in the next 16 days are 2.0m 14s and forecast to arrive on Tuesday (Mar 17) at 9AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.6m 7s period and expected on Saturday (Mar 21) at 6AM.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+) 9AM (Thu 19th Mar)5ft (1.6m) 14s
Best Surf 3PM (Mon 23rd Mar)10ft (3.0m) 8s
Most Powerful 9AM (Tue 17th Mar)6.5ft (2.0m) 14s

Table - best surf conditions forecast for Choshi over the next 16 days.

Updates in  hr  min  s Forecast update imminent 
16 DaysHourly
Print Table

Short Range Forecast Heavy rain (total 21mm), heaviest during Thu morning. Very mild (max 15°C on Wed night, min 9°C on Thu night). Winds increasing (light winds from the ENE on Tue morning, fresh winds from the NE by Thu afternoon).

Days 3-6 Weather Summary Light rain (total 2mm), mostly falling on Fri afternoon. Very mild (max 14°C on Sun morning, min 5°C on Fri night). Winds increasing (calm on Sat morning, fresh winds from the SSW by Sun afternoon).

Tuesday
17
Wednesday
18
Thursday
19
Friday
20
Saturday
21
Sunday
22
Monday
23
AMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNight
Rating
(10 max)
2
2
3
2
0
1
4
1
2
0
0
1
2
0
0
0
0
0
0
!
3
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
2
E
1.8
E
1.7
E
1.7
E
1.7
E
1.8
E
1.6
E
1.4
E
1.6
ENE
1.7
ENE
1
E
1.1
E
0.9
ENE
0.9
ENE
0.8
ENE
0.7
ENE
1.1
S
1.1
S
1.5
SE
3
ESE
1.4
SSE
Period(s) (?)14141313141414141313141413131212556811
Wave
Graph
(?)Metric surfscale
Energy kJ (?)15311190100110061110127997171589294642948029028919814253621361267452
Wind
(km/h)
15
ENE
10
E
10
E
15
SE
25
S
30
SSW
20
NW
30
NNE
25
NE
20
ENE
20
ENE
30
NNW
15
N
20
SE
30
SSW
25
SW
35
SSW
35
SSW
25
S
25
N
25
NNW
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
on		cross-
on		cross-
on		oncross-
on		crossoffcross-
off		crosscross-
on		crosscross-
off		cross-
off		oncrosscrosscrosscrosscross-
on		cross-
off		off
High Tide
/ height (m)
2:52PM
1.23
4:11AM
1.18
3:38PM
1.30
4:28AM
1.22
4:23PM
1.32
4:45AM
1.25
5:09PM
1.31
5:03AM
1.28
5:55PM
1.26
5:22AM
1.30
6:45PM
1.17
5:43AM
1.31
7:41PM
1.06
Low Tide
/ height (m)
9:16AM
0.63
9:39PM
0.14
9:48AM
0.48
10:11PM
0.18
10:20AM
0.33
10:41PM
0.26
10:54AM
0.19
11:10PM
0.37
11:30AM
0.07
11:38PM
0.50
12:09PM
0.00
12:03AM
0.64
12:51PM
-0.02
12:24AM
0.76
Tuesday
17
Wednesday
18
Thursday
19
Friday
20
Saturday
21
Sunday
22
Monday
23
Sunrise5:46--5:43--5:43--5:41--5:39--5:39--5:37--
Sunset-5:45--5:45--5:45--5:46--5:47--5:49--5:50-
cloud
clear
part cloud
part cloud
light rain
mod rain
mod rain
cloud
light rain
cloud
rain showers
part cloud
clear
clear
clear
clear
part cloud
light rain
light rain
heavy rain
rain showers
Rain (mm)
----1810-2-1------15132
Temp. °C10111213141512131210111091012141414151110
Feels °C (?)6798910974465545658962
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
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The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Choshi 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.

View detailed surf forecast for Choshi at:
surf-forecast.com

Information about the Choshi Surf forecast

The above surf forecast table for Choshi provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Choshi can be found by selecting the local surf guide option on the grey menu. Our Choshi 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 (Choshi) 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 Choshi 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.

Choshi is 4 km (2 miles) from Hasaki. If you plan a holiday in Chiba, look for hotels and other accommodation in Hasaki. Hasaki has rooms for a wide range of budgets as well as car hire and transport links.

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