Mera surfForecast / Chiba / Japan

information circle48hr Weather and Surf, issued 2 am Monday 04 May 2026 JST
Forecast update in hr  min  s Forecast update imminent
Mera surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Mera sea temperature is
18.9° C
(Which is slightly cooler than normal)

How big are the waves at Mera today?

The current surf forecast for Mera at 5AM is: 3.5m 8s primary swell from a South-southwest direction and 0.5m 10s secondary swell from a East-southeast direction (forecast issued at 02:00am May 04). An open ocean swell of 0.1m 10s is not directed at the surf break. The wind direction is predicted to be onshore.

Time (JST) & DateWave HeightWave Period
Morning (04 May)13ft (4.0m)9s
Afternoon (04 May)11ft (3.5m)9s
Evening (04 May)11ft (3.5m)9s

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


Updates in  hr  min  s Forecast update imminent

Short Range Forecast

Heavy rain (total 20mm), heaviest during Mon morning. Warm (max 20°C on Mon morning, min 14°C on Mon night). Winds decreasing (near gales from the SW on Mon afternoon, light winds from the SSE by Wed night).

Monday
4
Tuesday
5
Wednesday
6
12 AM
3 AM
6 AM
9 AM
12 PM
3 PM
6 PM
9 PM
12 AM
3 AM
6 AM
9 AM
12 PM
3 PM
6 PM
9 PM
12 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
3
0
1
2
0
0
0
0
0
0
0
0
0
0
0
0
Swell
Height Map
<span class="translation_missing" title="translation missing: en.components.forecast-table.maps.snow_map">Snow Map</span><span class="translation_missing" title="translation missing: en.components.forecast-table.maps.snow_map">Snow Map</span><span class="translation_missing" title="translation missing: en.components.forecast-table.maps.snow_map">Snow Map</span>
<span class="translation_missing" title="translation missing: en.components.forecast-table.maps.snow_map">Snow Map</span><span class="translation_missing" title="translation missing: en.components.forecast-table.maps.snow_map">Snow Map</span><span class="translation_missing" title="translation missing: en.components.forecast-table.maps.snow_map">Snow Map</span>
<span class="translation_missing" title="translation missing: en.components.forecast-table.maps.snow_map">Snow Map</span><span class="translation_missing" title="translation missing: en.components.forecast-table.maps.snow_map">Snow Map</span><span class="translation_missing" title="translation missing: en.components.forecast-table.maps.snow_map">Snow Map</span>
Wave
Height (m)
Direction
Period (s)
2.2
SSW
6
3
SSW
7
4
SSW
8
4
SW
9
3.5
SW
9
3.5
SW
9
3.5
SW
9
3.5
SW
9
3
SW
9
2.1
SW
9
1.6
SW
9
1.3
SW
9
1
SW
8
0.9
SW
8
0.6
ESE
10
0.6
ESE
10
0.6
ESE
10
0.6
ESE
9
0.6
ESE
9
0.9
SE
6
0.9
SE
6
0.6
ESE
9
0.6
ESE
9
0.6
ESE
9
Wave Graph
Metric surfscale
Energy kJ
384
937
1959
2644
2199
2147
2150
2019
1452
744
412
269
142
100
69
63
61
59
58
58
56
56
55
55
Wind (km/h)
45
SSW
60
SSW
65
SW
55
SW
55
SW
55
SW
55
WSW
50
WSW
20
NNE
40
NNE
35
NNE
20
NE
15
SE
15
SSE
20
SSE
20
S
20
S
15
SSW
15
S
15
SSE
15
S
20
SSE
20
SSE
20
SSE
on
on
on
on
on
on
on
on
cross-off
cross-off
off
off
cross
cross
cross
cross-on
cross-on
cross-on
cross-on
cross
cross-on
cross-on
cross-on
cross
High Tide
4:47AM1.39m
6:52PM1.27m
5:13AM1.36m
7:31PM1.22m
5:39AM1.31m
8:16PM1.16m
Low Tide
11:26PM0.75m
11:50AM-0.02m
11:57PM0.79m
12:22PM0.02m
00:29AM0.83m
12:57PM0.07m
cloud
light rain
light rain
rain showers
clear
part cloud
part cloud
cloud
clear
part cloud
cloud
part cloud
clear
clear
clear
clear
part cloud
part cloud
cloud
cloud
cloud
cloud
cloud
light rain
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
4:48
4:47
4:46
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:27
6:28
6:29
1
1
6
2
Temp °C
20
20
21
20
19
19
19
17
18
15
14
15
16
16
16
17
18
18
18
18
18
18
17
18
13
11
11
13
10
9
9
7
13
6
5
9
12
12
12
13
14
15
16
15
16
15
15
16
Swell 1
Height (m)
Direction
Period (s)
0.6
ESE
9
0.6
ESE
10
0.5
ESE
10
0.5
ESE
10
0.4
ESE
10
0.4
ESE
10
0.4
ESE
10
0.4
ESE
10
0.4
ESE
10
2.1
SW
9
1.6
SW
9
1.3
SW
9
1
SW
8
0.9
SW
8
0.7
SW
8
0.6
SW
8
0.6
ESE
10
0.6
ESE
9
0.6
ESE
9
0.6
ESE
9
0.9
SE
6
0.9
SE
5
0.8
SE
5
0.7
SE
5
Energy kJ
68
71
51
54
39
33
42
42
42
744
412
269
142
100
69
51
61
59
58
58
44
42
35
30
Swell 2
Height (m)
Direction
Period (s)
0.1
NE
10
0.1
NE
10
0.3
E
10
0.5
S
7
0.4
ESE
10
0.4
ESE
10
0.4
ESE
10
0.5
ESE
10
0.6
ESE
10
0.6
ESE
10
0.5
SW
8
0.4
WSW
8
0.4
SW
7
0.4
SW
7
0.6
ESE
9
0.6
ESE
9
0.6
ESE
9
0.6
ESE
9
Energy kJ
4
4
17
27
41
39
38
55
64
63
30
23
14
13
56
56
55
55
Swell 3
Height (m)
Direction
Period (s)
0.4
ESE
10
0.3
SSE
7
0.4
S
7
0.3
S
7
0.4
ENE
4
0.1
N
11
0.4
SW
7
0.2
WSW
7
0.2
WSW
7
0.2
WSW
6
0.1
SW
6
Energy kJ
42
9
15
8
7
2
13
5
4
4
1
Wind waves
Height (m)
Direction
Period (s)
2.2
SSW
6
3
SSW
7
4
SSW
8
4
SW
9
3.5
SW
9
3.5
SW
9
3.5
SW
9
3.5
SW
9
3
SW
9
1.1
NE
4
1
NE
5
0.8
ENE
4
0.7
E
4
0.6
E
4
0.7
SE
4
0.8
SE
4
0.9
SE
5
0.9
SE
5
0.9
SE
6
Energy kJ
384
937
1959
2644
2199
2147
2150
2019
1452
49
44
20
14
12
17
25
32
42
50
Nearest Offshore or Glassy
Rating
(10 max)
2
5
3
2
4
4
1
3
1
2
1
2
1
1
1
1
1
1
1
1
1
1
1
1
Distance (km)
767
504
500
483
483
521
500
50
69
56
55
0
36
47
64
64
64
74
36
64
64
64
64
70
Best forecast wave conditions in Chiba
Rating
(10 max)
2
2
2
1
1
1
1
1
1
1
1
1
1
1
1
Best forecast wave conditions in Japan
Rating
(10 max)
3
5
4
4
4
4
1
4
1
2
1
2
1
1
1
1
1
1
1
1
1
1
1
1
Header Global
Rating
(10 max)
5
4
4
4
4
4
5
5
5
5
5
4
5
5
5
5
5
5
5
5
5
5
8
5
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
Map placeholder

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