ジョンビーチ
Coastal areas · Japan
Rating right now
ジョンビーチ is a S-facing sand beach on the Japan shoreline, opening onto the Philippine Sea — it catches SE–SW swell, and offshore NW–NE winds tidy the banks through april–october.
10-day forecast
Local time · updates hourly
Wave height & period
Wind
| Time | Rating | Waves | Swell | Wind | Air |
|---|---|---|---|---|---|
Water temperature by month
This month: ~28.3°C (82.9°F) on average
Jan
21.7°C
71.1°F · 20.1–23.3°C
Feb
20.8°C
69.4°F · 18.8–22.5°C
Mar
21.1°C
70°F · 19.9–22.1°C
Apr
21.9°C
71.4°F · 20.2–23.6°C
May
23.2°C
73.8°F · 20.6–25.1°C
Jun
26°C
78.8°F · 21.8–28.9°C
Jul
28.1°C
82.6°F · 25.8–30.1°C
Aug
28°C
82.4°F · 25.4–30°C
Sep
28.3°C
82.9°F · 26.7–30°C
Oct
27.4°C
81.3°F · 24.8–29.1°C
Nov
25.7°C
78.3°F · 23.5–27.6°C
Dec
23.8°C
74.8°F · 21.7–25°C
25-year monthly averages from the NOAA OISST satellite record — typical range min–max, not a live reading.
Know before you go
Best swell
SE–SW
Best wind
NW–NE
Break type
Beach break
Best season
April–October
Safety: Friendly by surf standards, but rip currents and drop-in etiquette still apply. Shifting sandbars create moving rip currents — learn to spot them and use them to get out back.
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