Amatu Surf Forecast

/ Chiba (19 surf breaks) /

Japan (129 surf breaks) / Lat Long: (35.12° N 140.19° E)

Surf Forecasts:

Amatu surfForecast / Chiba / Japan

48hr Weather and Surf, issued 2 pm Thursday 23 Oct 2025 JST

Forecast update in hr min s Forecast update imminent

Amatu surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.

Today's Amatu sea temperature is 24.9° C
(Which is 2.0°C warmer than normal for this time of year)

How big are the waves at Amatu today?

The current surf forecast for Amatu at 8PM is: 2.0m 8s primary swell from a East-northeast direction (forecast issued at 02:00pm October 23). The wind direction is predicted to be cross-offshore.

Time (JST) & Date	Wave Height	Wave Period
Morning (23 Oct)	-	-
Afternoon (23 Oct)	4.5ft (1.4m)	8s
Evening (23 Oct)	6.5ft (2.0m)	8s

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

Updates in hr min s Forecast update imminent

12 Days Hourly

Print Table

	Thursday 23				Friday 24								Saturday 25								Sunday 26
	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)	1	0	0	0	2	2	1	2	1	0	1	1	1	1	2	1	1	2	1	1	3	2	2	3
Swell Height Map See all maps
Wave Height (m) & direction (?)	ENE	E	ENE	ENE	E	E	E	E	ENE	E	E	E	E	E	E	E	E	E	ESE	E	ESE	ESE	ESE	ESE
Period(s) (?)	8	8	8	8	8	8	8	8	8	8	8	8	8	9	9	9	9	9	8	8	8	8	8	8
Wave Graph (?)
kJ (?)	419	229	450	460	535	539	552	552	473	418	428	439	409	398	509	342	335	290	290	324	367	307	264	549
Wind (km/h)	NNE	NNE	NNE	NNE	NNE	NNE	NNE	N	NNE	NE	NE	NNE	NE	NNE	N	N	N	N	N	N	N	N	N	N
Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy	cross- off	cross- off	cross- off	cross- off	cross- off	cross- off	cross- off	cross- off	cross- off	cross- off	cross- off	cross- off	cross- off	cross- off	cross- off	cross- off	cross- off	off	cross- off	cross- off	cross- off	off	cross- off	cross- off
High Tide / height (m)			4:39PM 1.52					6:10AM 1.41			5:01PM 1.51					6:49AM 1.35			5:24PM 1.48					7:32AM 1.29
Low Tide / height (m)	11:05AM 0.76				11:24PM 0.16				11:31AM 0.82				11:54PM 0.16				11:57AM 0.89					12:27AM 0.19

	Thursday 23				Friday 24								Saturday 25								Sunday 26
Sunrise	-	-	-	-	-	-	5:52	-	-	-	-	-	-	-	5:52	-	-	-	-	-	-	-	5:52	-
Sunset	-	4:54	-	-	-	-	-	-	-	4:53	-	-	-	-	-	-	-	4:52	-	-	-	-	-	-

Rain (mm)	-	-	-	-	-	-	-	1	-	-	-	1	-	1	1	-	-	-	-	-	-	1	1	3
Temp. °C	16	17	16	16	16	15	15	14	15	15	16	15	16	15	15	16	17	17	16	16	17	17	16	16
Feels °C (?)	10	11	11	11	12	10	10	10	10	10	12	11	13	12	12	13	14	15	14	14	17	17	15	16

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 The wind is still offshore at Amatu (light winds from the N at Katsuura 11 km from Amatu). 2.3m 8s swell from the NE with a 1.2m 8s swell from the E. 2 swells combining so expect closeout sets.
1 hour 15 minutes ago Amatu

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1 h 15 min ago

11 km/h

Offshore

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