Matsube Bay Surf Forecast

/ Chiba (19 surf breaks) /

Japan (129 surf breaks)

Surf Forecasts:

Matsube Bay surfForecast / Chiba / Japan

12 Day Weather and Surf, issued 2 am Wednesday 05 Nov 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 21.3° C
(Which is slightly cooler than normal)

Best Forecast Surf Conditions for Matsube Bay this week:

The surf forecast for Matsube Bay over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Friday (Nov 07) at 6AM. The primary swell is predicted to be 2.5m and 11s period with a secondary swell of 0.1m and 13s. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Matsube Bay in the next 12 days are 4.0m 11s and forecast to arrive on Thursday (Nov 06) at 9PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 4s period and expected on Wednesday (Nov 12) at 9AM.

Wave Type	Time (JST) & Date	Wave Height & Period
Next good surf (1 star+)	6AM (Fri 7th Nov)	8ft (2.5m) 11s
Best Surf	6AM (Fri 7th Nov)	8ft (2.5m) 11s
Most Powerful	9PM (Thu 6th Nov)	13ft (4.0m) 11s

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

Updates in hr min s Forecast update imminent

12 Days Hourly

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	Short Range Forecast Moderate rain (total 16mm), heaviest on Thu morning. Very mild (max 19°C on Fri afternoon, min 13°C on Fri night). Winds decreasing (fresh winds from the N on Thu morning, light winds from the W by Fri afternoon).									Days 3-6 Weather Summary Heavy rain (total 21mm), heaviest during Sun night. Warm (max 20°C on Sun afternoon, min 13°C on Mon night). Winds increasing (light winds from the SSE on Sat night, strong winds from the SW by Sun night).
	Wednesday 05			Thursday 06			Friday 07			Saturday 08			Sunday 09			Monday 10			Tuesday 11
	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	2	3	4	3	3	0	0	0	0	0	0	3	0	1	2	2	0
Swell Height Map See all maps
Wave Height (m) & direction (?)	ENE	NE	ESE	ENE	ENE	E	E	E	E	ENE	ENE	ESE	S	S	SSE	S	S	S	SSW	SSW	SSW
Period(s) (?)	8	8	6	7	9	11	11	11	10	10	10	10	13	13	14	8	12	13	14	14	13
Wave Graph (?)
kJ (?)	59	95	108	249	867	2439	1168	972	615	274	192	163	127	158	2444	328	138	366	213	351	342
Wind (km/h)	NNE	NE	ENE	N	NNE	N	N	W	NW	ENE	ENE	ESE	SSW	SSW	SSW	NNW	N	N	NNE	SE	SW
Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy	cross- off	cross	cross- on	cross- off	cross- off	cross- off	cross- off	cross- off	off	cross	cross- on	cross- on	cross- on	cross	cross	off	cross- off	cross- off	cross- off	on	cross
High Tide / height (m)		3:22PM 1.48		5:07AM 1.45	3:49PM 1.52		5:58AM 1.43	4:18PM 1.54		6:50AM 1.37	4:50PM 1.53		7:47AM 1.29	5:24PM 1.49		8:53AM 1.21		6:01PM 1.41	10:14AM 1.16		6:45PM 1.29
Low Tide / height (m)	9:46AM 0.72		10:14PM 0.00	10:23AM 0.82		10:54PM -0.09	10:57AM 0.91		11:36PM -0.11	11:30AM 0.99		12:21AM -0.06		12:02PM 1.05	1:09AM 0.05		12:38PM 1.08	2:04AM 0.19		1:36PM 1.09

	Wednesday 05			Thursday 06			Friday 07			Saturday 08			Sunday 09			Monday 10			Tuesday 11
Sunrise	6:01	-	-	6:03	-	-	6:03	-	-	6:05	-	-	6:05	-	-	6:07	-	-	6:07	-	-
Sunset	-	4:40	-	-	4:39	-	-	4:38	-	-	4:37	-	-	4:37	-	-	4:37	-	-	4:36	-

Rain (mm)	-	1	9	5	-	-	-	-	1	1	-	3	1	-	16	-	-	-	-	-	2
Temp. °C	18	17	17	14	16	15	18	19	17	14	15	17	19	20	20	20	20	15	16	16	19
Feels °C (?)	14	13	15	8	11	11	16	18	16	8	11	15	17	17	14	17	14	8	13	14	15

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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Information about the Matsube Bay Surf forecast

The above surf forecast table for Matsube Bay provides essential information for determining whether the surfing conditions will be good over the next 12 days. A general guide to surfing at Matsube Bay can be found by selecting the local surf guide option on the grey menu. Our Matsube Bay 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 (Matsube Bay) 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 Matsube Bay 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.

Matsube Bay is 2 km (1 miles) from Katsuura. If you plan a holiday in Chiba, look for hotels and other accommodation in Katsuura. Katsuura has rooms for a wide range of budgets as well as car hire and transport links.