Mera Surf Break

Lat Long: 34.90° N 139.84° E

Mera Surf Forecast and Surf Report

Issued: 2 am 17 Sep 2026 (local time)

Forecast update in  hr  min

Today's Mera sea temperature is
25.8°C
0.2° 

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


Mera surf forecast from 16 Sep 2026:

  • Best quality surf: Monday 21 Sep, 9AM (local time) - 5.5ft (1.7m), 11s period, SE swell with glassy winds.
  • Most powerful swell: Sunday 20 Sep, 9PM (local time) - 16ft (5.0m), 13s period, SE swell with 8,483 kJ wave energy.
  • Next surfable swell (1★+): Monday 21 Sep, 9AM (local time) - 5.5ft (1.7m), 11s period with SE swell.

Best Forecast Surf Conditions for Mera this week:

The surf forecast for Mera over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Monday (Sep 21) at 9AM. The primary swell is predicted to be 1.7m and 11s period with a secondary swell of 1.6m and 10s. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Mera in the next 16 days are 5.0m 13s and forecast to arrive on Sunday (Sep 20) 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 2.3m 6s period and expected on Sunday (Sep 20) at 6PM.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+) 9AM (Mon 21st Sep)5.5ft (1.7m) 11s
Best Surf 9AM (Mon 21st Sep)5.5ft (1.7m) 11s
Most Powerful 9PM (Sun 20th Sep)16ft (5.0m) 13s

Table - best surf conditions forecast for Mera over the next 16 days.


Short Range Forecast

Heavy rain (total 22mm), heaviest during Sat morning. Warm (max 23°C on Thu afternoon, min 19°C on Thu night). Mainly strong winds.

Days 4-6 Weather Summary

Heavy rain (total 54mm), heaviest during Sun morning. Warm (max 26°C on Mon morning, min 22°C on Sun morning). Mainly near gales.

Thursday
17
Friday
18
Saturday
19
Sunday
20
Monday
21
Tuesday
22
Wednesday
23
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
0
0
2
4
8
0
0
3
4
0
1
0
0
0
0
0
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.6
E
12
0.2
SSE
9
0.6
E
11
0.3
SE
8
0.3
SE
11
1.6
SE
13
3.5
SE
14
4
SE
13
4.5
SE
12
4.5
SE
12
4.5
SE
12
4.5
SE
12
1.7
SE
11
1.2
E
10
0.9
E
9
0.5
SSE
8
1.1
E
9
0.8
E
5
0.4
SE
7
0.4
SE
9
0.3
SSE
8
Wave Graph
Metric surfscale
Energy kJ
103
8
91
10
23
839
4749
6007
6082
5813
5710
5731
677
271
129
38
192
37
12
20
14
Wind (km/h)
30
NE
35
NE
40
NNE
45
NNE
45
NNE
45
N
45
N
40
NNE
35
NNE
50
N
50
NNE
40
N
5
SSW
20
S
15
ENE
20
NE
30
ENE
10
E
20
NE
15
ENE
10
ENE
Wind State
off
off
off
cross-off
cross-off
cross-off
cross-off
cross-off
off
cross-off
cross-off
cross-off
glassy
cross-on
cross-off
off
cross-off
cross-off
off
off
cross-off
High Tide
6:51PM1.45m
9:37AM1.11m
7:13PM1.38m
7:37PM1.30m
8:22PM1.20m
3:07PM1.24m
00:00AM1.16m
3:20PM1.31m
1:33AM1.25m
3:36PM1.37m
2:27AM1.35m
Low Tide
1:09PM0.94m
2:17AM0.44m
1:24PM1.02m
3:17AM0.52m
4:59AM0.57m
6:48AM0.53m
8:05PM1.09m
7:52AM0.45m
8:35PM0.97m
8:35AM0.38m
9:03PM0.85m
rain showers
clear
part cloud
part cloud
cloud
cloud
mod rain
light rain
heavy rain
heavy rain
heavy rain
part cloud
clear
clear
clear
part cloud
part cloud
rain showers
part cloud
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:24
5:24
5:24
5:26
5:26
5:26
5:28
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:45
5:44
5:43
5:40
5:39
5:37
5:37
 mm
1
9
1
11
37
14
3
Temp °C
21
23
20
20
21
21
22
23
23
22
23
25
26
26
25
25
25
25
25
25
25
Feels °C
17
19
15
14
16
16
19
21
20
16
16
25
29
26
28
25
23
25
25
26
27
  • 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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Information about the Mera Surf forecast

The above surf forecast table for Mera provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Mera can be found by selecting the local surf guide option on the grey menu. Our Mera 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 (Mera) 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 Mera 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.

Mera is 9 km (6 miles) from Tateyama. If you plan a holiday in Chiba, look for hotels and other accommodation in Tateyama. Tateyama has rooms for a wide range of budgets as well as car hire and transport links.

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