Using Surf-Forecast’s Historical Surf Data To Find The Most Consistent Waves On Earth
Using our statistical data for 7000 spots dating back to 2006, we can find those waves that break the most, with the best winds.
Surf Forecasts:
Mera surfForecast / Chiba / Japan
48hr Weather and Surf, issued 2 am Friday 19 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
20.8° C
(Which is 1.5°C warmer than normal for this time of year)How big are the waves at Mera today?
The current surf forecast for Mera at 8AM is: 0.2m 10s primary swell from a East-southeast direction (forecast issued at 02:00am December 19). An open ocean swell of 0.4m 14s is not directed at the surf break, a second open ocean swell of 0.7m 4s is not directed at the surf break. The wind direction is predicted to be offshore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (19 Dec) | 0.5ft (0.2m) | 11s |
| Afternoon (19 Dec) | 0.5ft (0.2m) | 11s |
| Evening (19 Dec) | 0.5ft (0.2m) | 11s |
Table - waves today at Mera. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Friday 19 | Saturday 20 | Sunday 21 | ||||||||||||||||||||||
| 0 AM | 3 AM | 6 AM | 9 AM | 12 PM | 3 PM | 6 PM | 9 PM | 0 AM | 3 AM | 6 AM | 9 AM | 12 PM | 3 PM | 6 PM | 9 PM | 0 AM | 3 AM | 6 AM | 9 AM | 12 PM | 3 PM | 6 PM | 9 PM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    | |||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 6 | 10 | 10 | 11 | 11 | 11 | 11 | 11 | 5 | 6 | 6 | 6 | 6 | 6 | 7 | 7 | 7 | 7 | 8 | 8 | 8 | 8 | 9 | 9 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 10 | 10 | 10 | 11 | 11 | 11 | 11 | 11 | 83 | 155 | 138 | 128 | 156 | 299 | 448 | 494 | 602 | 681 | 645 | 650 | 727 | 1204 | 1486 | 1004 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | off | off | off | off | off | glass | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | on | on | on | on | on |
High Tide / height (m) | 5:08AM 1.33 | 3:08PM 1.42 | 5:42AM 1.36 | 3:43PM 1.43 | 6:17AM 1.37 | 4:17PM 1.44 | ||||||||||||||||||
Low Tide / height (m) | 9:53PM 0.08 | 9:58AM 0.94 | 10:27PM 0.03 | 10:36AM 0.94 | 11:01PM -0.01 | 11:11AM 0.93 | ||||||||||||||||||
Friday 19 | Saturday 20 | Sunday 21 | ||||||||||||||||||||||
| Sunrise | - | - | - | 6:41 | - | - | - | - | - | - | - | 6:43 | - | - | - | - | - | - | - | 6:43 | - | - | - | - |
| Sunset | - | - | - | - | - | 4:30 | - | - | - | - | - | - | - | 4:31 | - | - | - | - | - | - | - | 4:31 | - | - |
 |  | |  |  | | | |  | | | | |  | | | | |  |  | | |  | | |
Rain (mm) | - | - | - | - | - | - | - | - | 1 | 1 | - | - | - | 1 | 4 | 4 | 3 | 2 | 10 | 15 | 12 | 3 | - | - |
| Temp. °C | 11 | 11 | 11 | 11 | 12 | 14 | 16 | 16 | 16 | 17 | 17 | 18 | 19 | 19 | 17 | 19 | 19 | 18 | 18 | 18 | 16 | 17 | 19 | 18 |
| Feels °C (?) | 6 | 6 | 7 | 7 | 9 | 13 | 14 | 13 | 12 | 12 | 10 | 12 | 14 | 16 | 13 | 13 | 12 | 11 | 11 | 11 | 10 | 12 | 16 | 15 |
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
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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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