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Mera surfForecast / Chiba / Japan
12 Day Weather and Surf, issued 2 am Wednesday 24 Dec 2025 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
20.5° C
(Which is 1.5°C warmer than normal for this time of year)Best Forecast Surf Conditions for Mera this week:
The surf forecast for Mera over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Wednesday (Dec 24) at 3PM. The primary swell is predicted to be 3.0m and 8s period with a secondary swell of 2.5m and 8s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Mera in the next 12 days are 4.0m 8s and forecast to arrive on Friday (Dec 26) at 6AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 14s period and expected on Friday (Dec 26) at 9AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3PM (Wed 24th Dec) | 10ft (3.0m) 8s |
| Best Surf | 3PM (Wed 24th Dec) | 10ft (3.0m) 8s |
| Most Powerful | 6AM (Fri 26th Dec) | 13ft (4.0m) 8s |
Table - best surf conditions forecast for Mera over the next 12 days.
Updates in hr min s Forecast update imminent
Short Range Forecast Heavy rain (total 50mm), heaviest during Wed morning. Very mild (max 16°C on Wed night, min 3°C on Fri night). Winds increasing (light winds from the NNW on Wed afternoon, gales from the WSW by Thu night). | Days 3-6 Weather Summary Mostly dry. Very mild (max 14°C on Mon afternoon, min 4°C on Sat morning). Winds increasing (calm on Sat night, strong winds from the SW by Mon night). | ||||||||||||||||||||
Wednesday 24 | Thursday 25 | Friday 26 | Saturday 27 | Sunday 28 | Monday 29 | Tuesday 30 | |||||||||||||||
| AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Rating (10 max) | |||||||||||||||||||||
Swell Height Map |  |  |  |  |  |  |  | ||||||||||||||
| Wave Height (m) & direction (?) | |||||||||||||||||||||
| Period(s) (?) | 7 | 8 | 8 | 8 | 8 | 8 | 9 | 9 | 9 | 8 | 9 | 9 | 9 | 8 | 8 | 8 | 7 | 5 | 6 | 6 | 6 |
Wave (?)Graph  | |||||||||||||||||||||
 kJ (?) | 589 | 1131 | 1110 | 523 | 748 | 862 | 1797 | 1655 | 370 | 56 | 52 | 40 | 28 | 25 | 21 | 14 | 13 | 73 | 165 | 126 | 47 |
Wind (km/h) | |||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- on | cross- off | cross | on | cross- on | cross- on | cross- on | cross- off | off | off | cross- off | glass | cross- off | cross- off | cross- off | cross- on | on | on | cross- on | cross | cross- on |
High Tide / height (m) | 6:06PM 1.37 | 8:30AM 1.30 | 6:52PM 1.30 | 9:03AM 1.29 | 7:49PM 1.20 | 9:36AM 1.28 | 9:06PM 1.10 | 10:12AM 1.29 | 10:57PM 1.03 | 10:54AM 1.30 | 1:06AM 1.07 | 11:44AM 1.33 | 2:47AM 1.18 | ||||||||
Low Tide / height (m) | 12:59PM 0.89 | 1:21AM 0.10 | 1:43PM 0.85 | 1:58AM 0.21 | 2:36PM 0.80 | 2:39AM 0.36 | 3:42PM 0.72 | 3:24AM 0.53 | 5:00PM 0.60 | 4:20AM 0.72 | 6:19PM 0.44 | 5:36AM 0.88 | 7:26PM 0.26 | ||||||||
Wednesday 24 | Thursday 25 | Friday 26 | Saturday 27 | Sunday 28 | Monday 29 | Tuesday 30 | |||||||||||||||
| Sunrise | 6:45 | - | - | 6:45 | - | - | 6:46 | - | - | 6:46 | - | - | 6:47 | - | - | 6:47 | - | - | 6:47 | - | - |
| Sunset | - | 4:34 | - | - | 4:34 | - | - | 4:35 | - | - | 4:35 | - | - | 4:36 | - | - | 4:37 | - | - | 4:37 | - |
 | |  |  | |  |  | | | | | |  | |  | | | | | |  | |
Rain (mm) | 27 | 18 | 5 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 15 | 12 | 16 | 16 | 15 | 15 | 11 | 8 | 5 | 5 | 6 | 8 | 8 | 10 | 11 | 13 | 14 | 14 | 12 | 13 | 13 |
| Feels °C (?) | 10 | 11 | 14 | 15 | 12 | 10 | 3 | -1 | -4 | -1 | 2 | 5 | 2 | 5 | 7 | 8 | 9 | 4 | 6 | 10 | 8 |
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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.
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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 12 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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