Matsube Bay Surf Forecast

/ Chiba (19 surf breaks) /

Japan (129 surf breaks)

Surf Forecasts:

Matsube Bay surfForecast / Chiba / Japan

48hr Weather and Surf, issued 2 am Tuesday 16 Sep 2025 JST

Forecast update in hr min s Forecast update imminent

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

Today's Matsube Bay sea temperature is 27.2° C
(Which is 1.3°C warmer than normal for this time of year)

How big are the waves at Matsube Bay today?

The current surf forecast for Matsube Bay at 8AM is: 0.8m 9s primary swell from a East-southeast direction and 0.4m 13s secondary swell from a East-northeast direction, 0.4m 5s secondary swell from a East-northeast direction (forecast issued at 02:00am September 16). The wind direction is predicted to be cross-onshore.

Time (JST) & Date	Wave Height	Wave Period
Morning (16 Sep)	2.5ft (0.8m)	9s
Afternoon (16 Sep)	2.5ft (0.7m)	9s
Evening (16 Sep)	2.5ft (0.7m)	9s

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

Updates in hr min s Forecast update imminent

12 Days Hourly

Print Table

	Tuesday 16								Wednesday 17								Thursday 18
	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	12 PM	3 PM	6 PM	9 PM
Rating (10 max)	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	0
Swell Height Map See all maps
Wave Height (m) & direction (?)	ESE	ESE	ESE	ESE	ESE	ESE	ESE	ESE	ESE	ESE	ESE	ESE	ESE	ESE	ESE	ESE	SW	SW	SW	SW	SW	SW	SW	SW
Period(s) (?)	10	9	9	9	9	9	9	9	9	9	9	10	10	9	9	9	5	5	6	6	6	6	7	6
Wave Graph (?)
Energy (?)	102	115	109	158	150	129	125	126	125	101	93	110	117	117	126	112	135	126	132	159	227	226	402	104
Wind (km/h)	ESE	ENE	ENE	E	SE	SE	SE	S	SSW	SW	SSW	SW	SW	SW	SW	SW	SW	SW	SW	SW	SW	SW	NNE	NE
Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy	cross- on	cross	cross	cross- on	on	on	on	cross- on	cross	cross	cross	cross	cross	cross	cross	cross	cross	cross	cross	cross- off	cross	cross	cross- off	cross
High Tide / height (m)							4:32PM 1.19		9:23PM 1.20						3:39PM 1.23			12:35AM 1.19					3:45PM 1.26
Low Tide / height (m)			5:44AM 0.37					6:31PM 1.19				7:20AM 0.34				8:22PM 1.07				8:21AM 0.30				8:55PM 0.92

	Tuesday 16								Wednesday 17								Thursday 18
Sunrise	-	-	5:20	-	-	-	-	-	-	-	5:22	-	-	-	-	-	-	-	5:22	-	-	-	-	-
Sunset	-	-	-	-	-	5:45	-	-	-	-	-	-	-	5:44	-	-	-	-	-	-	-	5:42	-	-

Rain (mm)	-	1	1	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	2	1
Temp. °C	26	26	26	27	28	28	27	27	26	26	26	28	29	28	27	26	26	26	26	28	29	29	24	23
Feels °C (?)	30	30	30	30	31	32	31	31	30	30	30	30	30	29	30	28	27	27	28	28	29	30	24	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 Continuing clean conditions at Matsube Bay (light winds from the N at Katsuura 2 km from Matsube Bay). 0.6m 9s swell from the ESE with a 0.4m 9s swell from the E and a 0.3m 5s windswell from the SSW. 3 swells combining to make bigger set waves.
36 minutes ago Matsube Bay

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Actual: 36 min ago

6 km/h

Clean

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