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Surf Forecasts:
Mera surfForecast / Chiba / Japan
16 Day Weather and Surf, issued 8 pm Wednesday 20 May 2026 JSTForecast 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
20.9° C
(Which is normal for this time of year)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 Thursday (May 21) at 9PM. The primary swell is predicted to be 2.3m and 8s period with a secondary swell of 1.9m and 8s. Another secondary swell of 0.6m and 10s is also forecast. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Mera in the next 16 days are 1.4m 15s and forecast to arrive on Thursday (May 28) at 3AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.5m 9s period and expected on Friday (May 22) at 9PM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9PM (Thu 21st May) | 7.5ft (2.3m) 8s |
| Best Surf | 9PM (Thu 21st May) | 7.5ft (2.3m) 8s |
| Most Powerful | 3AM (Thu 28th May) | 4.5ft (1.4m) 15s |
Table - best surf conditions forecast for Mera over the next 16 days.
Updates in hr min s Forecast update imminent
Short Range ForecastModerate rain (total 17mm), heaviest on Thu night. Warm (max 23°C on Thu morning, min 13°C on Fri night). Winds increasing (light winds from the NE on Thu night, near gales from the NNE by Fri afternoon). | Days 5-7 Weather SummaryModerate rain (total 15mm), heaviest on Sun afternoon. Warm (max 23°C on Tue morning, min 18°C on Sun afternoon). Wind will be generally light. | ||||||||||||||||||||
Thursday 21 | Friday 22 | Saturday 23 | Sunday 24 | Monday 25 | Tuesday 26 | Wed 27 | |||||||||||||||
Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | |
Swell Height Map |  |  |  |  |  |  |  |  | |||||||||||||
ESE 10 | SSW 6 | SW 7 | SW 8 | SW 8 | SW 8 | SW 8 | SW 8 | SW 7 | E 9 | ESE 9 | ESE 8 | E 8 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 | SSE 16 | SSE 15 | |
142 | 244 | 630 | 634 | 255 | 136 | 42 | 9 | 8 | 586 | 572 | 459 | 313 | 209 | 215 | 145 | 130 | 110 | 73 | 91 | 181 | |
Wind (km/h) | |||||||||||||||||||||
on | on | on | off | cross-off | cross-off | cross-off | off | off | cross-off | cross-off | glassy | cross-on | cross-on | on | cross-on | cross | cross-on | cross-on | cross-on | on | |
High Tide | 6:11AM1.37m | 9:21PM1.22m | 7:00AM1.27m | 10:18PM1.18m | 8:06AM1.14m | 11:11PM1.16m | 9:52AM1.03m | 11:56PM1.16m | 12:00PM1.00m | 00:34AM1.19m | 1:37PM1.05m | 1:08AM1.24m | 2:46PM1.13m | ||||||||
Low Tide | 1:04AM0.96m | 1:49PM-0.01m | 1:57AM0.95m | 2:43PM0.14m | 3:10AM0.92m | 3:43PM0.30m | 4:51AM0.84m | 4:48PM0.45m | 6:23AM0.70m | 5:55PM0.58m | 7:23AM0.53m | 6:56PM0.68m | 8:08AM0.37m | ||||||||
 |  | |  |  | | | |  | | |  |  |  | |  | |  |  | | | |
 | — | 4:33 | — | — | 4:33 | — | — | 4:31 | — | — | 4:31 | — | — | 4:31 | — | — | 4:31 | — | — | 4:30 | — |
 | 6:39 | — | 6:39 | — | — | 6:40 | — | — | 6:42 | — | — | 6:43 | — | — | 6:43 | — | — | 6:44 | — | — | 6:45 |
1 | 2 | 2 | 10 | — | 1 | 1 | — | — | 1 | 2 | 9 | 2 | — | — | — | — | 1 | — | — | — | |
Temp °C | 22 | 23 | 22 | 19 | 16 | 15 | 14 | 18 | 19 | 19 | 19 | 18 | 19 | 21 | 22 | 22 | 23 | 23 | 22 | 22 | 22 |
23 | 20 | 19 | 20 | 9 | 6 | 6 | 13 | 14 | 16 | 19 | 20 | 21 | 22 | 22 | 24 | 24 | 23 | 21 | 19 | 19 | |
Swell 1 Height (m) Direction Period (s) | ESE 10 | ESE 10 | ESE 10 | SW 8 | SW 8 | SW 8 | SW 8 | SW 8 | SW 7 | SW 7 | SW 7 | ESE 8 | E 8 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 | ESE 9 |
 kJ | 142 | 115 | 83 | 378 | 255 | 136 | 42 | 9 | 8 | 2 | 2 | 459 | 313 | 209 | 215 | 145 | 130 | 110 | 73 | 76 | 92 |
Swell 2 Height (m) Direction Period (s) | NE 8 | NE 8 | NE 8 | ESE 10 | ESE 10 | ESE 10 | — | S 7 | S 7 | — | — | — | SSW 6 | SSW 8 | SSW 8 | SW 8 | SW 8 | SW 7 | SW 7 | SSE 16 | SSE 15 |
| kJ | 3 | 2 | 2 | 72 | 54 | 37 | — | 4 | 3 | — | — | — | 108 | 165 | 168 | 71 | 45 | 26 | 11 | 91 | 181 |
Swell 3 Height (m) Direction Period (s) | — | — | NE 12 | NE 7 | NE 10 | — | — | — | — | — | — | — | E 16 | N 4 | ESE 11 | SSE 6 | SSE 6 | ESE 15 | SE 10 | SE 10 | ENE 8 |
| kJ | — | — | 5 | 2 | 4 | — | — | — | — | — | — | — | 5 | 2 | 12 | 26 | 12 | 22 | 16 | 16 | 7 |
Wind waves Height (m) Direction Period (s) | S 4 | SSW 6 | SW 7 | SW 8 | NE 4 | NNE 6 | ENE 9 | ENE 9 | ENE 9 | E 9 | ESE 9 | — | NNW 4 | — | — | — | — | SSE 5 | SSE 4 | S 5 | SSW 5 |
| kJ | 13 | 244 | 630 | 634 | 26 | 231 | 990 | 753 | 675 | 586 | 572 | — | 40 | — | — | — | — | 10 | 15 | 53 | 70 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 73 | 61 | 43 | 0 | 483 | 517 | 585 | 808 | 850 | 47 | 0 | 0 | 12 | 12 | 64 | 33 | 36 | 88 | 64 | 1031 | 1039 |
Best forecast wave conditions in Chiba | |||||||||||||||||||||
Best forecast wave conditions in Japan | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
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FREE! Surf-Forecast.com widget for your website
The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Mera surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
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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