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

48hr Weather and Surf, issued 2 pm Wednesday 20 Aug 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 24.3° C
(Which is 2.2°C colder than average for this time of year)

How big are the waves at Choshi today?

The current surf forecast for Choshi at 5PM is: 1.1m 5s primary swell from a South direction and 0.3m 10s secondary swell from a East direction, 0.2m 13s secondary swell from a East-southeast direction (forecast issued at 02:00pm August 20). The wind direction is predicted to be cross-onshore.

Time (JST) & Date	Wave Height	Wave Period
Morning (20 Aug)	-	-
Afternoon (20 Aug)	3.5ft (1.0m)	5s
Evening (20 Aug)	3ft (0.9m)	5s

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

Updates in hr min s Forecast update imminent

12 Days Hourly

Print Table

	Wednesday 20				Thursday 21								Friday 22								Saturday 23
	12 PM	3 PM	6 PM	9 PM	0 AM	3 AM	6 AM	9 AM	12 PM	3 PM	6 PM	9 PM	0 AM	3 AM	6 AM	9 AM	12 PM	3 PM	6 PM	9 PM	0 AM	3 AM	6 AM	9 AM
Rating (10 max)	0	0	0	0	0	0	0	1	0	0	0	1	0	0	0	0	0	0	0	0	0	0	0	0
Swell Height Map See all maps
Wave Height (m) & direction (?)	E	S	S	S	S	S	SSW	S	ESE	ESE	ESE	S	E	ESE	ESE	ESE	ESE	E	ESE	SE	SE	SE	ESE	ESE
Period(s) (?)	10	5	5	5	5	5	6	5	13	12	12	5	9	12	12	12	10	8	10	10	9	9	9	9
Wave Graph (?)
Energy (?)	48	81	111	75	66	56	158	52	60	59	70	57	35	30	30	31	20	24	17	32	32	28	32	31
Wind (km/h)	S	SSW	SSW	SSW	SSW	SSW	SSW	S	ESE	E	SSE	SSW	NE	NE	ENE	E	ESE	SE	SSE	S	SSW	SSW	SW	SSW
Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy	cross- on	cross- on	cross	cross	cross	cross	cross	glass	cross- on	cross- on	on	glass	glass	cross	cross	cross- on	on	on	on	cross- on	cross- on	cross	cross	cross- on
High Tide / height (m)			4:22PM 1.31			1:08AM 1.36					4:32PM 1.33			2:19AM 1.43					4:46PM 1.34				3:13AM 1.48
Low Tide / height (m)				8:32PM 1.18				8:55AM 0.18					9:11PM 1.06				9:38AM 0.17				9:46PM 0.94

	Wednesday 20				Thursday 21								Friday 22								Saturday 23
Sunrise	-	-	-	-	-	-	4:58	-	-	-	-	-	-	-	5:00	-	-	-	-	-	-	-	5:01	-
Sunset	-	-	6:21	-	-	-	-	-	-	-	6:20	-	-	-	-	-	-	-	6:17	-	-	-	-	-

Rain (mm)	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-
Temp. °C	29	28	28	27	26	26	26	28	29	28	28	27	27	27	27	28	28	28	28	27	27	26	26	28
Feels °C (?)	30	27	28	28	28	28	30	33	33	31	31	33	32	31	31	32	31	31	32	31	31	30	29	31

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 Still cross-shore at Choshi (moderate winds from the SSW at Choshi 6 km from Choshi). 1.0m 5s windswell from the S with a 0.4m 10s swell from the E and a 0.2m 13s groundswell, also from the E as well as a 0.2m 10s swell, also from the SE. 4 swells combining to make bigger set waves.
1 hour 9 minutes ago Choshi

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1 h 9 min ago

20 km/h

SSW

Cross-Shore

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