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Surf Forecasts:
Mera surfForecast / Chiba / Japan
48hr Weather and Surf, issued 8 pm 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
21.3° C
(Which is normal for this time of year)How big are the waves at Mera today?
The current surf forecast for Mera at 3AM is: 1.4m 8s primary swell from a South-southwest direction and 0.6m 10s secondary swell from a East-southeast direction (forecast issued at 08:00pm May 21). An open ocean swell of 0.8m 4s is not directed at the surf break. The wind direction is predicted to be cross-offshore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (22 May) | 4.5ft (1.3m) | 8s |
| Afternoon (22 May) | 3ft (0.9m) | 8s |
| Evening (22 May) | 2ft (0.6m) | 8s |
Table - waves today at Mera. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastHeavy rain (total 24mm), heaviest during Thu night. Warm (max 20°C on Sun afternoon, min 14°C on Fri afternoon). Winds decreasing (near gales from the NNE on Fri afternoon, light winds from the ESE by Sun morning). | ||||||||||||||||||||||||
Thu 21 | Friday 22 | Saturday 23 | Sunday 24 | |||||||||||||||||||||
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 | 12 PM | 3 PM | |
Swell Height Map |   |    |    |    | ||||||||||||||||||||
SSW 8 | SSW 8 | SSW 8 | SSW 8 | SSW 8 | SSW 8 | SSW 8 | SSW 8 | SW 8 | SSW 8 | SSW 8 | SSW 8 | SW 8 | SW 7 | S 6 | S 6 | E 9 | E 9 | E 9 | E 9 | ESE 9 | E 9 | ESE 9 | E 9 | |
480 | 365 | 318 | 224 | 219 | 178 | 158 | 109 | 62 | 42 | 40 | 22 | 9 | 9 | 3 | 3 | 614 | 563 | 568 | 577 | 577 | 392 | 474 | 269 | |
Wind (km/h) | ||||||||||||||||||||||||
cross-off | off | off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | off | off | off | off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross | |
High Tide | 9:21PM1.22m | 7:00AM1.27m | 10:18PM1.18m | 8:06AM1.14m | 11:11PM1.16m | 9:52AM1.03m | ||||||||||||||||||
Low Tide | 1:57AM0.95m | 2:43PM0.14m | 3:10AM0.92m | 3:43PM0.30m | 4:51AM0.84m | |||||||||||||||||||
 |  |  |  | | | | | | | |  |  |  | | | | | | | |  | | | |
 | — | — | — | 4:33 | — | — | — | — | — | — | — | 4:31 | — | — | — | — | — | — | — | 4:31 | — | — | — | — |
 | 6:39 | — | — | — | — | — | — | — | 6:40 | — | — | — | — | — | — | — | 6:42 | — | — | — | — | — | — | 6:43 |
1 | — | 1 | 12 | 3 | 2 | 1 | 1 | 1 | — | — | — | — | — | — | — | — | — | — | — | 1 | 1 | 1 | — | |
Temp °C | 18 | 17 | 16 | 16 | 16 | 16 | 16 | 15 | 14 | 15 | 14 | 14 | 14 | 16 | 18 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 20 |
16 | 14 | 12 | 12 | 10 | 9 | 8 | 6 | 5 | 7 | 7 | 7 | 8 | 10 | 13 | 15 | 15 | 16 | 16 | 16 | 18 | 18 | 18 | 19 | |
Swell 1 Height (m) Direction Period (s) | SSW 8 | SSW 8 | SSW 8 | SSW 8 | SSW 8 | SSW 8 | SSW 8 | SSW 8 | SW 8 | SSW 8 | SSW 8 | SSW 8 | SW 8 | SW 7 | S 6 | S 6 | SW 7 | SW 7 | SE 12 | SE 12 | SE 12 | SE 7 | SW 6 | E 9 |
 kJ | 480 | 365 | 318 | 224 | 219 | 178 | 158 | 109 | 62 | 42 | 40 | 22 | 9 | 9 | 3 | 3 | 2 | 2 | 6 | 6 | 6 | 85 | 2 | 269 |
Swell 2 Height (m) Direction Period (s) | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | S 9 | — | — | SE 8 | S 6 | S 6 | SW 7 | SW 7 | — | — | NE 11 | — | SW 7 | SW 6 | SW 6 | SE 7 |
| kJ | 83 | 74 | 72 | 72 | 52 | 54 | 54 | 38 | 6 | — | — | 2 | 3 | 3 | 2 | 2 | — | — | 5 | — | 2 | 2 | 2 | 121 |
Swell 3 Height (m) Direction Period (s) | E 7 | NE 11 | NE 11 | NE 11 | NE 10 | ESE 10 | — | ESE 10 | — | — | — | — | SE 8 | SSW 7 | — | — | — | — | — | — | — | — | — | ESE 10 |
| kJ | 1 | 5 | 5 | 5 | 4 | 72 | — | 51 | — | — | — | — | 2 | 5 | — | — | — | — | — | — | — | — | — | 10 |
Wind waves Height (m) Direction Period (s) | — | NE 3 | NE 4 | NE 4 | NE 4 | NE 5 | NE 5 | NNE 6 | NE 8 | NE 9 | ENE 9 | ENE 9 | ENE 9 | ENE 9 | ENE 9 | E 9 | E 9 | E 9 | E 9 | E 9 | ESE 9 | E 9 | ESE 9 | — |
| kJ | — | 3 | 12 | 21 | 31 | 68 | 143 | 283 | 692 | 885 | 883 | 830 | 753 | 753 | 775 | 690 | 614 | 563 | 568 | 577 | 577 | 392 | 474 | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 77 | 0 | 14 | 500 | 73 | 500 | 153 | 500 | 500 | 563 | 563 | 563 | 808 | 813 | 890 | 890 | 890 | 47 | 39 | 14 | 14 | 14 | 0 | 47 |
Best forecast wave conditions in Chiba | ||||||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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