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Surf Forecasts:
Mera surfForecast / Chiba / Japan
48hr Weather and Surf, issued 8 am Thursday 21 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)How big are the waves at Mera today?
The current surf forecast for Mera at 4PM is: 2.5m 8s primary swell from a Southwest direction and 0.7m 10s secondary swell from a East-southeast direction (forecast issued at 08:00am May 21). An open ocean swell of 0.1m 8s is not directed at the surf break. The wind direction is predicted to be cross-onshore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (21 May) | 6.5ft (2.0m) | 6s |
| Afternoon (21 May) | 8ft (2.5m) | 7s |
| Evening (21 May) | 8ft (2.4m) | 8s |
Table - waves today at Mera. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastModerate rain (total 13mm), heaviest on Sat night. Warm (max 23°C on Thu morning, min 14°C on Fri afternoon). Winds decreasing (strong winds from the NNE on Fri morning, light winds from the ESE by Sat night). | ||||||||||||||||||||||||
Thursday 21 | Friday 22 | Saturday 23 | Sun 24 | |||||||||||||||||||||
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 | 12 AM | 3 AM | |
Swell Height Map |    |    |    |    | ||||||||||||||||||||
ESE 10 | SSW 6 | SSW 7 | SW 7 | SW 8 | SW 8 | SW 8 | SSW 8 | SSW 8 | SW 8 | SW 8 | SSW 8 | SW 8 | SW 8 | SW 8 | SW 8 | SW 8 | SW 8 | SW 7 | E 9 | E 9 | E 9 | E 9 | ESE 6 | |
142 | 291 | 545 | 761 | 822 | 754 | 381 | 278 | 219 | 169 | 129 | 98 | 59 | 48 | 31 | 22 | 9 | 9 | 8 | 533 | 471 | 544 | 553 | 289 | |
Wind (km/h) | ||||||||||||||||||||||||
on | on | on | on | cross-off | off | off | cross-off | cross-off | cross-off | cross-off | off | off | off | off | off | off | off | off | cross-off | cross-off | cross-off | cross-off | cross-off | |
High Tide | 6:11AM1.37m | 9:21PM1.22m | 7:00AM1.27m | 10:18PM1.18m | 8:06AM1.14m | 11:11PM1.16m | ||||||||||||||||||
Low Tide | 1:49PM-0.01m | 1:57AM0.95m | 2:43PM0.14m | 3:10AM0.92m | 3:43PM0.30m | |||||||||||||||||||
 |  | | | |  |  | |  | | | | | | | | | | | | | | | | |
 | 4:33 | — | — | — | — | — | — | 4:33 | — | — | — | — | — | — | — | 4:31 | — | — | — | — | — | — | — | 4:31 |
 | — | — | — | — | 6:39 | — | — | — | — | — | — | — | 6:40 | — | — | — | — | — | — | — | 6:42 | — | — | 6:43 |
1 | 1 | 2 | 2 | 1 | — | 1 | 1 | — | — | — | 1 | — | — | — | — | — | — | — | — | — | — | — | 1 | |
Temp °C | 22 | 23 | 23 | 22 | 19 | 18 | 16 | 16 | 16 | 16 | 16 | 14 | 14 | 14 | 14 | 14 | 15 | 16 | 18 | 20 | 19 | 19 | 19 | 19 |
21 | 20 | 19 | 17 | 18 | 16 | 12 | 12 | 11 | 9 | 7 | 5 | 6 | 6 | 7 | 7 | 9 | 10 | 13 | 16 | 15 | 15 | 16 | 17 | |
Swell 1 Height (m) Direction Period (s) | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | SW 8 | SW 8 | SSW 8 | SSW 8 | SW 8 | SW 8 | SSW 8 | SW 8 | SW 8 | SW 8 | SW 8 | SW 8 | SW 8 | SW 7 | SW 7 | SW 7 | SSW 7 | SW 7 | SW 7 |
 kJ | 142 | 105 | 107 | 83 | 83 | 547 | 381 | 278 | 219 | 169 | 129 | 98 | 59 | 48 | 31 | 22 | 9 | 9 | 8 | 8 | 8 | 5 | 2 | 2 |
Swell 2 Height (m) Direction Period (s) | NE 8 | NE 8 | NE 8 | NE 8 | NE 11 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | SSE 8 | SE 8 | S 6 | SSE 8 | S 6 | S 6 | S 6 | SW 7 | — | N 11 | SE 12 | SE 12 |
| kJ | 2 | 2 | 2 | 2 | 5 | 74 | 54 | 52 | 52 | 54 | 52 | 51 | 6 | 3 | 3 | 6 | 3 | 3 | 3 | 8 | — | 2 | 6 | 6 |
Swell 3 Height (m) Direction Period (s) | — | — | — | NE 12 | — | NE 11 | NE 11 | NE 11 | — | — | — | — | — | — | SE 8 | S 6 | SSE 8 | — | — | — | — | — | NE 11 | NE 11 |
| kJ | — | — | — | 5 | — | 5 | 5 | 4 | — | — | — | — | — | — | 2 | 3 | 6 | — | — | — | — | — | 5 | 5 |
Wind waves Height (m) Direction Period (s) | SSW 6 | SSW 6 | SSW 7 | SW 7 | SW 8 | SW 8 | NE 3 | NE 5 | NE 5 | NE 6 | NE 5 | NE 6 | NE 8 | ENE 9 | ENE 9 | ENE 9 | ENE 9 | ENE 9 | ENE 9 | E 9 | E 9 | E 9 | E 9 | ESE 6 |
| kJ | 117 | 291 | 545 | 761 | 822 | 754 | 8 | 42 | 43 | 77 | 122 | 320 | 666 | 845 | 846 | 798 | 770 | 708 | 613 | 533 | 471 | 544 | 553 | 289 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 88 | 504 | 90 | 36 | 14 | 0 | 14 | 57 | 153 | 153 | 153 | 521 | 483 | 563 | 767 | 811 | 808 | 808 | 890 | 890 | 47 | 767 | 47 | 14 |
Best forecast wave conditions in Chiba | ||||||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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