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Choshi surfForecast / Chiba / Japan
48hr Weather and Surf, issued 2 am Monday 18 May 2026 JSTForecast update in hr min s Forecast update imminent
Choshi surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Choshi sea temperature is
17.9° C
(Which is 2.3°C colder than average for this time of year)How big are the waves at Choshi today?
The current surf forecast for Choshi at 8AM is: 0.9m 8s primary swell from a East-southeast direction and 0.2m 10s secondary swell from a East-northeast direction (forecast issued at 02:00am May 18). The wind direction is predicted to be onshore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (18 May) | 3ft (0.9m) | 8s |
| Afternoon (18 May) | 2.5ft (0.8m) | 9s |
| Evening (18 May) | 2.5ft (0.8m) | 9s |
Table - waves today at Choshi. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastModerate rain (total 11mm), heaviest on Wed night. Warm (max 22°C on Mon afternoon, min 17°C on Wed night). Winds decreasing (fresh winds from the SSW on Tue afternoon, calm by Wed morning). | ||||||||||||||||||||||||
Monday 18 | Tuesday 19 | Wednesday 20 | ||||||||||||||||||||||
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 | 6 PM | 9 PM | |
Swell Height Map |    |    |    | |||||||||||||||||||||
ESE 9 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | |
158 | 118 | 118 | 120 | 127 | 99 | 103 | 106 | 84 | 86 | 88 | 92 | 98 | 75 | 104 | 116 | 88 | 88 | 88 | 86 | 86 | 85 | 74 | 74 | |
Wind (km/h) | ||||||||||||||||||||||||
glassy | glassy | cross-off | on | cross-on | cross-on | cross-on | cross | cross | cross | cross | cross-on | cross-on | cross-on | cross-on | cross-on | cross | cross | cross | cross-off | glassy | glassy | glassy | glassy | |
High Tide | 3:34AM1.34m | 6:18PM1.20m | 4:10AM1.35m | 7:10PM1.16m | 4:49AM1.33m | 8:04PM1.10m | ||||||||||||||||||
Low Tide | 10:20PM0.82m | 10:59AM-0.24m | 10:58PM0.87m | 11:44AM-0.22m | 11:37PM0.90m | 12:32PM-0.15m | ||||||||||||||||||
 | |  | | | | | | | | | | | | | | |  |  | | | | |  | |
 | — | 4:30 | — | — | — | — | — | — | — | 4:28 | — | — | — | — | — | — | — | 4:28 | — | — | — | — | — | — |
 | — | — | — | — | — | — | 6:36 | — | — | — | — | — | — | — | 6:37 | — | — | — | — | — | — | — | 6:37 | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | |
Temp °C | 19 | 19 | 19 | 20 | 21 | 22 | 21 | 20 | 20 | 19 | 19 | 21 | 21 | 21 | 20 | 20 | 20 | 19 | 19 | 21 | 21 | 20 | 20 | 19 |
20 | 20 | 19 | 20 | 20 | 21 | 19 | 19 | 19 | 18 | 18 | 19 | 18 | 17 | 17 | 19 | 19 | 18 | 18 | 21 | 23 | 22 | 22 | 21 | |
Swell 1 Height (m) Direction Period (s) | ESE 9 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 |
 kJ | 158 | 118 | 118 | 120 | 127 | 99 | 103 | 106 | 84 | 86 | 88 | 92 | 98 | 75 | 104 | 116 | 88 | 88 | 88 | 86 | 86 | 85 | 74 | 74 |
Swell 2 Height (m) Direction Period (s) | ENE 10 | ENE 10 | ENE 10 | ENE 10 | ENE 10 | ENE 10 | ENE 10 | ENE 9 | ENE 9 | ENE 9 | ENE 9 | ENE 9 | ENE 9 | ENE 9 | NE 9 | NE 9 | NE 9 | NE 9 | NE 8 | S 5 | S 5 | S 5 | S 5 | SSE 5 |
| kJ | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 12 | 20 | 19 | 19 | 18 | 17 | 12 | 12 | 12 | 7 |
Swell 3 Height (m) Direction Period (s) | NE 9 | S 7 | S 7 | SE 10 | SSE 8 | SE 7 | SE 10 | SE 7 | SE 9 | NE 9 | NE 9 | NE 9 | NE 11 | NE 11 | E 11 | NE 9 | NE 9 | NE 9 | NE 9 | ENE 8 | ENE 8 | ENE 8 | NE 8 | — |
| kJ | 12 | 1 | 1 | 16 | 11 | 2 | 33 | 12 | 31 | 29 | 29 | 29 | 5 | 5 | 2 | 38 | 37 | 37 | 36 | 14 | 14 | 14 | 24 | — |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | SSE 2 | S 3 | S 4 | S 4 | S 4 | S 4 | S 4 | S 4 | S 5 | S 5 | S 4 | S 4 | S 4 | S 5 | SSW 5 | SSW 5 | NNE 2 | — | NE 4 |
| kJ | — | — | — | — | — | 1 | 7 | 9 | 6 | 7 | 10 | 11 | 27 | 51 | 41 | 25 | 18 | 18 | 21 | 32 | 23 | 1 | — | 17 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 56 | 56 | 56 | 56 | 203 | 206 | 159 | 159 | 206 | 640 | 640 | 307 | 159 | 159 | 159 | 55 | 0 | 0 | 0 | 0 | 0 |
Best forecast wave conditions in Chiba | ||||||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||||||
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