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Surf Forecasts:
Shonan surfForecast / Kanagawa / Japan
48hr Weather and Surf, issued 2 pm Monday 18 May 2026 JSTForecast update in hr min s Forecast update imminent
Shonan surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Shonan sea temperature is
19.8° C
(Which is slightly cooler than normal)How big are the waves at Shonan today?
The current surf forecast for Shonan at 11PM is: 0.3m 10s primary swell from a Southeast direction and 0.2m 7s secondary swell from a South-southeast direction, 0.2m 10s secondary swell from a East-southeast direction, 0.5m 3s secondary swell from a South-southwest direction (forecast issued at 02:00pm May 18). The wind direction is predicted to be cross-onshore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (18 May) | - | - |
| Afternoon (18 May) | 1ft (0.3m) | 10s |
| Evening (18 May) | 1ft (0.3m) | 10s |
Table - waves today at Shonan. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastModerate rain (total 17mm), heaviest on Wed night. Warm (max 25°C on Wed afternoon, min 17°C on Thu morning). Wind will be generally light. | ||||||||||||||||||||||||
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 |   |    |    |    | ||||||||||||||||||||
SE 10 | SE 10 | SE 10 | SE 10 | SSE 7 | ESE 10 | SE 10 | SE 10 | SE 11 | S 4 | S 4 | SE 11 | SE 11 | SE 11 | SE 11 | SE 10 | SE 10 | SE 10 | SE 10 | SE 10 | SE 10 | SE 9 | SE 9 | SE 9 | |
17 | 16 | 16 | 16 | 10 | 10 | 16 | 29 | 18 | 35 | 39 | 29 | 29 | 29 | 29 | 28 | 27 | 26 | 25 | 15 | 23 | 14 | 14 | 13 | |
Wind (km/h) | ||||||||||||||||||||||||
cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross | cross | cross-on | on | cross-on | cross-on | cross-on | cross-on | cross | off | cross-off | |
High Tide | 6:48PM1.49m | 4:55AM1.57m | 7:42PM1.43m | 5:34AM1.54m | 8:39PM1.36m | 6:17AM1.47m | ||||||||||||||||||
Low Tide | 11:33AM-0.11m | 11:41PM1.02m | 12:19PM-0.09m | 00:22AM1.06m | 1:08PM-0.01m | 1:08AM1.09m | ||||||||||||||||||
 | | |  | | | | | | | |  | | |  | | |  | |  |  | |  | | |
 | — | — | — | — | — | 4:35 | — | — | — | — | — | — | — | 4:35 | — | — | — | — | — | — | — | 4:33 | — | — |
 | — | — | 6:40 | — | — | — | — | — | — | — | 6:40 | — | — | — | — | — | — | — | 6:42 | — | — | — | — | 6:43 |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 4 | 4 | 4 | |
Temp °C | 22 | 22 | 22 | 21 | 20 | 19 | 19 | 22 | 23 | 24 | 23 | 21 | 20 | 20 | 20 | 22 | 23 | 25 | 24 | 23 | 22 | 21 | 20 | 17 |
18 | 18 | 19 | 18 | 19 | 18 | 18 | 20 | 19 | 20 | 20 | 20 | 19 | 19 | 20 | 22 | 22 | 23 | 24 | 23 | 23 | 23 | 21 | 14 | |
Swell 1 Height (m) Direction Period (s) | SE 8 | SE 8 | SSE 7 | SE 7 | SSE 7 | ESE 10 | SE 10 | SE 10 | SE 11 | SE 11 | SE 11 | SE 11 | SE 11 | SE 11 | SE 11 | SE 10 | SE 10 | SE 10 | SE 10 | S 4 | SE 10 | SE 9 | SE 9 | SE 9 |
 kJ | 9 | 9 | 5 | 8 | 5 | 10 | 16 | 28 | 18 | 18 | 18 | 29 | 29 | 29 | 29 | 28 | 27 | 26 | 25 | 8 | 23 | 14 | 14 | 13 |
Swell 2 Height (m) Direction Period (s) | SE 10 | SE 10 | ESE 10 | SE 10 | ESE 10 | SSE 7 | SSE 7 | ESE 9 | ESE 9 | E 10 | — | — | — | — | — | SSE 5 | — | — | — | SE 10 | S 4 | S 4 | S 4 | S 4 |
| kJ | 4 | 4 | 10 | 4 | 10 | 5 | 4 | 29 | 16 | 8 | — | — | — | — | — | 4 | — | — | — | 15 | 3 | 1 | 1 | 1 |
Swell 3 Height (m) Direction Period (s) | SE 10 | SE 10 | SE 10 | SE 10 | SSE 7 | E 9 | — | — | — | — | — | — | — | — | — | — | — | — | — | WSW 4 | S 6 | S 6 | S 6 | S 6 |
| kJ | 17 | 16 | 16 | 16 | 9 | 6 | — | — | — | — | — | — | — | — | — | — | — | — | — | 2 | 1 | 1 | 1 | 1 |
Wind waves Height (m) Direction Period (s) | — | S 3 | S 3 | S 3 | SSW 3 | SW 3 | SW 3 | SSW 3 | S 4 | S 4 | S 4 | SSW 4 | SSW 4 | SSW 4 | SSW 4 | SSW 4 | SSW 3 | S 4 | S 4 | SSW 4 | — | — | — | NE 2 |
| kJ | — | 2 | 8 | 6 | 4 | 3 | 2 | 4 | 13 | 35 | 39 | 26 | 16 | 11 | 6 | 5 | 4 | 10 | 15 | 5 | — | — | — | 1 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 87 | 87 | 87 | 87 | 87 | 29 | 29 | 87 | 88 | 510 | 482 | 29 | 29 | 29 | 29 | 86 | 88 | 482 | 29 | 29 | 86 | 86 | 82 | 26 |
Best forecast wave conditions in Kanagawa | ||||||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||||||
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