Choshi Surf Forecast

/ Chiba (19 surf breaks) /

Japan (129 surf breaks) / Lat Long: (35.71° N 140.80° E)

Surf Forecasts:

Choshi surfForecast / Chiba / Japan

12 Day Weather and Surf, issued 8 am Saturday 13 Sep 2025 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 26.4° C
(Which is slightly warmer than usual)

Best Forecast Surf Conditions for Choshi this week:

The surf forecast for Choshi over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Sunday (Sep 14) at 6PM. The primary swell is predicted to be 1.2m and 6s period with a secondary swell of 0.7m and 6s. Another secondary swell of 0.3m and 10s is also forecast. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Choshi in the next 12 days are 1.9m 8s and forecast to arrive on Saturday (Sep 20) at 12PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.0m 4s period and expected on Saturday (Sep 20) at 6AM.

Wave Type	Time (JST) & Date	Wave Height & Period
Next good surf (1 star+)	6PM (Sun 14th Sep)	4ft (1.2m) 6s
Best Surf	6PM (Sun 14th Sep)	4ft (1.2m) 6s
Most Powerful	12PM (Sat 20th Sep)	6ft (1.9m) 8s

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

Updates in hr min s Forecast update imminent

12 Days Hourly

Print Table

	Short Range Forecast Light rain (total 2mm), mostly falling on Sat morning. Warm (max 30°C on Sun morning, min 25°C on Sun night). Winds decreasing (strong winds from the SSW on Sat night, calm by Mon night).									Days 3-6 Weather Summary Moderate rain (total 12mm), heaviest on Thu night. Warm (max 28°C on Wed morning, min 21°C on Thu night). Winds increasing (light winds from the W on Wed night, strong winds from the NE by Thu night).
	Saturday 13			Sunday 14			Monday 15			Tuesday 16			Wednesday 17			Thursday 18			Friday 19
	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night
Rating (10 max)	0	0	0	0	0	0	0	0	1	0	0	0	0	0	0	1	0	0	0	0	1
Swell Height Map See all maps
Wave Height (m) & direction (?)	ENE	E	S	SSW	SSW	S	E	E	ESE	ESE	ESE	ESE	ESE	ESE	E	ESE	ENE	NE	ENE	ENE	ENE
Period(s) (?)	6	11	5	7	6	6	14	13	10	9	9	9	9	10	9	10	4	6	6	6	7
Wave Graph (?)
kJ (?)	24	21	62	204	113	19	32	31	36	46	46	64	45	57	43	52	35	128	131	136	222
Wind (km/h)	SSW	SSW	SW	SW	SW	NE	NNE	NE	ESE	ENE	SE	S	SSW	S	SSW	NNE	NE	NE	NE	NE	NE
Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy	cross- on	cross- on	cross	cross	cross	cross	cross- off	cross	glass	cross	on	cross- on	cross- on	cross- on	cross	cross- off	cross	cross	cross	cross	cross- off
High Tide / height (m)			6:26PM 1.50	10:05AM 1.12		6:47PM 1.47			7:07PM 1.40			6:22PM 1.31		3:32PM 1.30	11:46PM 1.24		3:30PM 1.32	1:32AM 1.31		3:39PM 1.34	2:31AM 1.39
Low Tide / height (m)		12:37PM 1.00	2:14AM 0.31		12:23PM 1.11		3:25AM 0.37			5:04AM 0.41			6:41AM 0.40		8:11PM 1.18	7:48AM 0.37		8:34PM 1.04	8:36AM 0.36		9:02PM 0.89

	Saturday 13			Sunday 14			Monday 15			Tuesday 16			Wednesday 17			Thursday 18			Friday 19
Sunrise	5:16	-	-	5:16	-	-	5:18	-	-	5:18	-	-	5:20	-	-	5:20	-	-	5:20	-	-
Sunset	-	5:47	-	-	5:45	-	-	5:45	-	-	5:44	-	-	5:42	-	-	5:40	-	-	5:38	-

Rain (mm)	2	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	1	11	2	2	6
Temp. °C	27	27	27	30	28	26	26	26	26	27	27	27	28	28	26	27	26	22	21	21	21
Feels °C (?)	27	26	25	33	31	29	27	28	30	30	29	30	29	28	28	31	26	18	18	19	20

Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)
Wind Speed (km/h)

Recent Eyeball Surf Reports for Chiba

Wind Update Offshore wind reported 22 km from Tsurigasaki Surfing Beach (Tokyo 2020) (light winds from the S at Katsuura 22 km from Tsurigasaki Surfing Beach (Tokyo 2020)). 0.6m 6s windswell from the ENE with a 0.4m 10s swell from the E and a 0.2m 11s groundswell from the SE. 3 swells combining to make bigger set waves.
1 hour 4 minutes ago Tsurigasaki Surfing Beach (Tokyo 2020)

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2 h 4 min ago

15 km/h

SSW

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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.

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 12 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.