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Surf Forecasts

Matsube Bay surfForecast / Chiba / Japan

information circle12 Day Weather and Surf, issued 8 am Monday 12 May 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
17.8° C
 (Which is 2.3°C colder than average for this time of year)

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 Monday (May 12) at 6PM. The primary swell is predicted to be 0.7m and 11s period with a secondary swell of 0.1m and 11s. Another secondary swell of 1.1m and 6s is also forecast. 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 1.7m 7s and forecast to arrive on Monday (May 19) at 3PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.8m 5s period and expected on Saturday (May 17) at 12PM.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+) 6PM (Mon 12th May)2.5ft (0.7m) 11s
Best Surf 6PM (Mon 12th May)2.5ft (0.7m) 11s
Most Powerful 3PM (Mon 19th May)5.5ft (1.7m) 7s

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

Hourly12 Days
Chiba Surf
Print Surf Table
Updates in  hr  min  s Forecast update imminent 
Monday
12
Tuesday
13
Wednesday
14
Thursday
15
Friday
16
Saturday
17
Sunday
18
Monday
19
Tuesday
20
Wednesday
21
Thursday
22
Friday
23
AMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNight
Rating
(10 max)
0
0
0
0
0
0
0
0
1
0
0
0
0
0
0
0
1
1
0
0
0
0
0
0
0
0
0
2
0
0
0
0
0
0
0
0
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
0.8
ESE
0.7
E
0.7
E
0.5
E
0.5
E
0.5
E
0.4
E
0.5
ESE
0.5
ESE
0.5
E
0.6
ESE
0.6
ESE
0.5
E
0.5
E
0.5
E
1.5
S
1.3
S
0.7
SE
0.8
SSE
0.8
ESE
0.7
ESE
1.4
SSW
1.7
SSW
2.3
SSW
3.5
SSW
3
SSW
1.2
S
1.6
E
1.3
E
0.9
ESE
0.8
ESE
0.9
ESE
0.9
ESE
0.8
ESE
0.8
ESE
0.8
ESE
Period(s) (?)12121111101010101010101010109777678677998761091010101010
Wave
Graph
(?)Metric surfscale
Energy (?)1861341165651483159585278754847452111545350625513723448616761191160222141166100132137109103107
Wind
(km/h)
25
WSW
20
SW
20
NE
10
NE
10
SE
5
SSW
10
ESE
10
SE
5
SSE
5
SE
15
SSE
15
SSW
15
SSW
10
NE
20
WSW
15
SW
15
SW
5
W
15
SSW
20
SSW
20
SW
15
SSW
20
SSW
45
SSW
55
SSW
55
SW
30
SW
20
NNE
30
NE
5
ENE
15
ENE
15
E
10
ESE
15
ENE
10
ESE
10
SSE
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
off		crosscrosscrossoncrossononglassoncross-
on		crosscross-
on		crosscross-
off		crosscross-
off		cross-
off		crosscross-
on		crosscross-
on		crosscrosscrosscrosscrosscross-
off		crosscrosscross-
on		cross-
on		cross-
on		cross-
on		cross-
on		on
High Tide
/ height (m)
5:06PM
1.32
3:41AM
1.41
5:42PM
1.32
4:06AM
1.42
6:20PM
1.30
4:33AM
1.42
7:00PM
1.26
5:01AM
1.41
7:46PM
1.22
5:32AM
1.38
8:40PM
1.19
6:07AM
1.33
9:44PM
1.18
6:50AM
1.25
10:50PM
1.20
7:56AM
1.15
11:44PM
1.23
9:53AM
1.06
12:25AM
1.27
12:01PM
1.06
12:58AM
1.31
1:36PM
1.13
1:29AM
1.36
Low Tide
/ height (m)
10:14AM
0.17
10:15PM
0.84
10:44AM
0.12
10:43PM
0.89
11:16AM
0.10
11:10PM
0.93
11:51AM
0.11
11:39PM
0.96
12:28PM
0.14
12:11AM
0.99
1:09PM
0.19
12:52AM
1.03
1:55PM
0.25
1:56AM
1.05
2:49PM
0.33
3:42AM
1.04
3:52PM
0.41
5:35AM
0.94
5:02PM
0.49
6:46AM
0.77
6:12PM
0.57
7:34AM
0.58
7:14PM
0.66
Monday
12
Tuesday
13
Wednesday
14
Thursday
15
Friday
16
Saturday
17
Sunday
18
Monday
19
Tuesday
20
Wednesday
21
Thursday
22
Friday
23
Sunrise4:37--4:37--4:35--4:35--4:33--4:33--4:33--4:31--4:31--4:31--4:30--4:30--
Sunset-6:31--6:32--6:34--6:34--6:35--6:36--6:37--6:37--6:37--6:38--6:39--6:40-
cloudcloudcloudpart cloudclearpart cloudcloudcloudclearpart cloudpart cloudpart cloudcloudmod rainheavy rainlight rainpart cloudpart cloudpart cloudpart cloudpart cloudlight rainlight rainmod rainmod rainlight rainpart cloudcloudpart cloudpart cloudclearclearpart cloudpart cloudpart cloudpart cloud
Rain (mm)
-------------8242-----11781----------
Temp. °C191916181918202019212019201718192019222220212122222221191718191919201918
Feels °C (?)161613171717202020211919191718191919212119222118161517181217161618181717

Short Range Forecast: Mostly dry. Warm (max 20°C on Wed morning, min 16°C on Mon night). Wind will be generally light.

Days 3-6 Weather Summary Heavy rain (total 34mm), heaviest during Fri night. Warm (max 21°C on Thu morning, min 16°C on Fri night). Wind will be generally light.

Days 6-9 Weather Summary Moderate rain (total 18mm), heaviest on Mon night. Warm (max 22°C on Sun morning, min 19°C on Tue night). Winds decreasing (near gales from the SW on Tue afternoon, light winds from the W by Tue night).

Long Range Forecast: Mostly dry. Warm (max 20°C on Fri morning, min 17°C on Wed afternoon). Winds decreasing (fresh winds from the NE on Wed afternoon, calm by Fri night).

  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
<span class="translation_missing" title="translation missing: en.leaflet.map_placeholder_alt">Map Placeholder Alt</span>
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View detailed surf forecast for Matsube Bay at:
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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.

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