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Surf Forecasts:
Mera surfForecast / Chiba / Japan
48hr Weather and Surf, issued 8 am 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
19.4° C
(Which is 1.4°C colder than average for this time of year)How big are the waves at Mera today?
The current surf forecast for Mera at 3PM is: 1.0m 9s primary swell from a East direction and 0.4m 7s secondary swell from a Southeast direction (forecast issued at 08:00am May 18). The wind direction is predicted to be cross-onshore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (18 May) | 3.5ft (1.1m) | 8s |
| 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 ForecastSome drizzle, heaviest during Wed night. Warm (max 21°C on Mon morning, min 18°C on Wed night). Winds decreasing (fresh winds from the SSW on Tue afternoon, calm by Wed night). | ||||||||||||||||||||||||
Monday 18 | Tuesday 19 | Wednesday 20 | Thu 21 | |||||||||||||||||||||
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 8 | ESE 8 | ESE 9 | E 9 | ESE 9 | ESE 8 | ESE 8 | E 9 | SE 11 | SE 11 | SE 10 | SE 11 | SE 10 | SE 10 | ESE 10 | ESE 10 | SE 10 | SE 10 | ESE 10 | SE 10 | ESE 10 | SE 10 | ESE 9 | ESE 10 | |
180 | 180 | 166 | 158 | 129 | 118 | 94 | 99 | 92 | 92 | 108 | 110 | 102 | 115 | 178 | 175 | 196 | 124 | 171 | 188 | 161 | 177 | 154 | 157 | |
Wind (km/h) | ||||||||||||||||||||||||
cross-off | cross | cross-on | cross-on | cross-on | on | on | on | on | on | on | on | on | on | on | on | on | on | on | on | on | on | on | glassy | |
High Tide | 4:13AM1.48m | 6:39PM1.41m | 4:50AM1.48m | 7:31PM1.35m | 5:28AM1.45m | 8:25PM1.29m | ||||||||||||||||||
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 | — | — | — | — | — | — | 4:35 | — | — | — | — | — | — | — | 4:33 | — | — | — | — | — | — | — | 4:33 |
 | — | — | — | — | 6:37 | — | — | — | — | — | — | — | 6:38 | — | — | — | — | — | — | — | 6:39 | — | — | 6:39 |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Temp °C | 20 | 20 | 21 | 21 | 21 | 20 | 20 | 19 | 19 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 19 | 20 | 21 | 21 | 21 | 20 | 20 | 20 |
19 | 20 | 21 | 20 | 20 | 19 | 19 | 18 | 18 | 18 | 18 | 17 | 18 | 18 | 18 | 18 | 18 | 19 | 20 | 21 | 21 | 21 | 22 | 23 | |
Swell 1 Height (m) Direction Period (s) | ESE 8 | ESE 8 | ESE 9 | E 9 | ESE 9 | ESE 8 | ESE 8 | E 9 | E 9 | E 9 | SE 10 | SE 11 | SE 10 | SE 10 | ESE 10 | ESE 10 | SE 10 | SE 10 | ESE 10 | SE 10 | ESE 10 | SE 10 | ESE 9 | ESE 10 |
 kJ | 180 | 180 | 166 | 158 | 129 | 118 | 94 | 99 | 78 | 81 | 108 | 110 | 102 | 115 | 178 | 175 | 196 | 124 | 171 | 188 | 161 | 177 | 154 | 157 |
Swell 2 Height (m) Direction Period (s) | NE 11 | NE 10 | SE 8 | SE 7 | SSE 7 | SE 10 | SE 11 | SE 10 | SE 11 | SE 11 | E 9 | E 9 | E 9 | E 10 | NE 9 | NE 9 | NE 9 | E 10 | NE 9 | NE 8 | NE 8 | NE 8 | NE 8 | NE 8 |
| kJ | 5 | 4 | 14 | 14 | 21 | 36 | 40 | 80 | 92 | 92 | 78 | 79 | 60 | 77 | 3 | 3 | 3 | 70 | 3 | 3 | 3 | 3 | 3 | 2 |
Swell 3 Height (m) Direction Period (s) | — | SE 7 | 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 | — | S 8 | S 8 | — | S 8 | S 8 |
| kJ | — | 14 | 4 | 16 | 16 | 13 | 9 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | — | — | — | 3 | — | 1 | 1 | — | 1 | 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 | WSW 3 | SW 4 | SW 3 | SW 3 | — | — | E 2 |
| kJ | — | — | — | — | — | 1 | 2 | 2 | 3 | 2 | 3 | 5 | 10 | 11 | 10 | 12 | 7 | 8 | 6 | 3 | 1 | — | — | 1 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 0 | 36 | 64 | 64 | 64 | 87 | 87 | 73 | 73 | 87 | 529 | 529 | 73 | 73 | 73 | 73 | 70 | 36 | 74 | 74 | 70 | 64 | 12 | 0 |
Best forecast wave conditions in Chiba | ||||||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||||||
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