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Surf Forecasts:
Mera surfForecast / Chiba / Japan
48hr Weather and Surf, issued 2 pm Monday 18 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
20.0° C
(Which is slightly cooler than normal)How big are the waves at Mera today?
The current surf forecast for Mera at 10PM is: 0.9m 8s primary swell from a East-southeast direction and 0.4m 10s secondary swell from a Southeast direction, 0.3m 2s secondary swell from a Southwest direction (forecast issued at 02:00pm May 18). The wind direction is predicted to be onshore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (18 May) | - | - |
| Afternoon (18 May) | 3.5ft (1.0m) | 9s |
| Evening (18 May) | 3ft (0.9m) | 8s |
Table - waves today at Mera. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastLight rain (total 7mm), mostly falling on Thu morning. Warm (max 21°C on Mon afternoon, min 19°C on Mon night). Mainly fresh winds. | ||||||||||||||||||||||||
Mon 18 | Tuesday 19 | Wednesday 20 | Thu 21 | |||||||||||||||||||||
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 | 6 AM | 9 AM | |
Swell Height Map |    |    |    |    | ||||||||||||||||||||
ESE 9 | E 9 | ESE 9 | ESE 8 | ESE 8 | E 9 | SE 11 | SE 11 | SE 10 | SE 11 | SE 10 | SE 10 | SE 10 | SE 10 | SE 10 | SE 10 | SE 10 | ESE 10 | ESE 10 | ESE 10 | SE 9 | SE 10 | SE 10 | ESE 10 | |
166 | 158 | 129 | 118 | 94 | 99 | 92 | 92 | 108 | 110 | 102 | 115 | 136 | 229 | 196 | 192 | 192 | 168 | 161 | 157 | 173 | 177 | 177 | 157 | |
Wind (km/h) | ||||||||||||||||||||||||
cross-on | cross-on | cross-on | on | on | on | on | on | on | on | on | on | on | on | on | on | on | on | on | on | on | on | on | cross-on | |
High Tide | 6:39PM1.41m | 4:50AM1.48m | 7:31PM1.35m | 5:28AM1.45m | 8:25PM1.29m | 6:11AM1.37m | ||||||||||||||||||
Low Tide | 11:26AM-0.23m | 11:38PM0.90m | 12:12PM-0.21m | 00:19AM0.94m | 12:59PM-0.13m | 1:04AM0.96m | ||||||||||||||||||
 | | |  | | | | | | | | | | |  |  | | | |  |  | |  | | |
 | — | — | — | — | — | 4:35 | — | — | — | — | — | — | — | 4:33 | — | — | — | — | — | — | — | 4:33 | — | — |
 | — | — | 6:37 | — | — | — | — | — | — | — | 6:38 | — | — | — | — | — | — | — | 6:39 | — | — | — | — | 6:39 |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 1 | 1 | 2 | |
Temp °C | 21 | 21 | 21 | 20 | 20 | 19 | 19 | 20 | 20 | 20 | 20 | 20 | 20 | 19 | 19 | 20 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 20 |
21 | 20 | 20 | 19 | 19 | 18 | 17 | 18 | 18 | 17 | 17 | 18 | 18 | 17 | 18 | 19 | 19 | 19 | 20 | 21 | 21 | 21 | 21 | 22 | |
Swell 1 Height (m) Direction Period (s) | ESE 9 | E 9 | ESE 9 | ESE 8 | ESE 8 | E 9 | E 9 | E 9 | SE 10 | SE 11 | SE 10 | SE 10 | SE 10 | SE 10 | SE 10 | SE 10 | SE 10 | ESE 10 | ESE 10 | ESE 10 | SE 9 | SE 10 | SE 10 | ESE 10 |
 kJ | 166 | 158 | 129 | 118 | 94 | 99 | 78 | 81 | 108 | 110 | 102 | 115 | 136 | 229 | 196 | 192 | 192 | 168 | 161 | 157 | 173 | 177 | 177 | 157 |
Swell 2 Height (m) Direction Period (s) | SE 8 | SE 7 | SSE 7 | SE 10 | SE 11 | SE 10 | SE 11 | SE 11 | E 9 | E 9 | E 9 | E 10 | E 10 | NE 9 | NE 9 | NE 9 | NE 9 | NE 8 | NE 8 | SSW 3 | NE 8 | NE 8 | NE 8 | NE 8 |
| kJ | 14 | 14 | 21 | 36 | 40 | 80 | 92 | 92 | 78 | 79 | 60 | 77 | 77 | 3 | 3 | 3 | 3 | 3 | 3 | 2 | 3 | 3 | 2 | 2 |
Swell 3 Height (m) Direction Period (s) | NE 10 | SE 10 | SE 10 | SE 7 | SSE 7 | NE 9 | NE 9 | NE 9 | NE 9 | NE 9 | NE 9 | NE 9 | NE 9 | — | — | NE 9 | — | — | — | NE 8 | — | S 6 | — | — |
| kJ | 4 | 16 | 16 | 13 | 9 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | — | — | 21 | — | — | — | 3 | — | 1 | — | — |
Wind waves Height (m) Direction Period (s) | — | — | — | SW 2 | SW 3 | SW 3 | SW 3 | SW 3 | SW 3 | SW 3 | SW 4 | SW 4 | SW 4 | WSW 4 | WSW 4 | SW 3 | SW 3 | SW 3 | SW 3 | WSW 3 | SW 3 | — | — | ENE 2 |
| kJ | — | — | — | 1 | 2 | 3 | 3 | 2 | 3 | 5 | 8 | 10 | 10 | 11 | 7 | 6 | 5 | 6 | 6 | 2 | 3 | — | — | 1 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 64 | 64 | 64 | 87 | 87 | 73 | 73 | 87 | 88 | 529 | 504 | 73 | 73 | 73 | 70 | 70 | 88 | 504 | 73 | 64 | 64 | 70 | 51 | 12 |
Best forecast wave conditions in Chiba | ||||||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||||||
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