Detohama beach
Akita · Japan
Rating right now
Detohama beach is a SE-facing sand beach on the Japan shoreline, opening onto the Hakodate Bay — it catches E–S swell, and offshore W–N 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: ~24.9°C (76.8°F) on average
Jan
11.6°C
52.9°F · 9.5–13.2°C
Feb
9.7°C
49.5°F · 8.6–11.2°C
Mar
8.8°C
47.8°F · 7.3–10.1°C
Apr
10.2°C
50.4°F · 8.4–11.4°C
May
13.8°C
56.8°F · 10.3–17.5°C
Jun
18.3°C
64.9°F · 14.4–21.1°C
Jul
22.5°C
72.5°F · 17.8–25.6°C
Aug
26°C
78.8°F · 23.4–27.8°C
Sep
24.9°C
76.8°F · 22.4–29°C
Oct
21.1°C
70°F · 18.3–25.7°C
Nov
17.4°C
63.3°F · 15.1–19.5°C
Dec
14.2°C
57.6°F · 11.5–17.2°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
E–S
Best wind
W–N
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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