Sea Temperature in Nagasaki in December

Complete information on the sea temperature range in the Seto Inland Sea in Nagasaki in December. Historical daily data. Climate details for December. Tips on swimming conditions and beach relaxation in Nagasaki. We find every spot where you can swim and tell you what the water temperature is there today and throughout the year.

Water Temperature Range in Nagasaki in December

15°C

MINIMUN

18°C

AVERAGE

21°C

MAXIMUM

Historical Data of Water Temperature in December in Nagasaki

Water Temperature Chart for Seto Inland Sea in Nagasaki in December

Sea Temperature Table in Nagasaki in December Over the Past Years

Day	2024	2023	2022	Average
Dec 1	20°C	19°C	20°C	19.3°C
Dec 2	19°C	19°C	20°C	19.0°C
Dec 3	19°C	19°C	19°C	18.8°C
Dec 4	20°C	18°C	20°C	19.3°C
Dec 5	19°C	19°C	19°C	19.0°C
Dec 6	19°C	19°C	19°C	19.0°C
Dec 7	19°C	18°C	19°C	18.5°C
Dec 8	18°C	19°C	18°C	18.3°C
Dec 9	18°C	18°C	18°C	18.0°C
Dec 10	18°C	18°C	18°C	18.0°C
Dec 11	18°C	18°C	18°C	18.3°C
Dec 12	18°C	18°C	19°C	18.0°C
Dec 13	18°C	18°C	18°C	18.0°C
Dec 14	18°C	18°C	18°C	18.0°C
Dec 15	18°C	18°C	18°C	18.0°C
Dec 16	18°C	18°C	18°C	18.0°C
Dec 17	18°C	18°C	18°C	18.0°C
Dec 18	17°C	18°C	17°C	17.3°C
Dec 19	17°C	18°C	17°C	17.0°C
Dec 20	17°C	18°C	17°C	17.3°C
Dec 21	17°C	18°C	18°C	17.5°C
Dec 22	17°C	17°C	18°C	17.3°C
Dec 23	17°C	17°C	17°C	17.0°C
Dec 24	17°C	17°C	17°C	17.0°C
Dec 25	16°C	17°C	16°C	16.5°C
Dec 26	17°C	17°C	16°C	16.8°C
Dec 27	16°C	17°C	17°C	16.8°C
Dec 28	16°C	16°C	16°C	16.0°C
Dec 29	16°C	16°C	17°C	16.5°C
Dec 30	16°C	16°C	16°C	16.0°C

Nagasaki Climate and Swimming Opportunities in December

12°C

Average Day Air Temperature

5°C

Average Night Air Temperature

64 mm

Precipitation Amount per Month

10 days

Number of Rainy Days

10 hrs

Daylight
per Day

3 hrs

Sunshine
per Day

15 km/h

Average Wind Speed

69%

Average
humidity

Nagasaki lies within the Nagasaki Prefecture in Japan. The average daytime temperature in Nagasaki in December is 12°C (54°F), while the nighttime average is 5°C (41°F). There are typically 10 rainy days during the month, with a total precipitation of 64 mm (2.5 inches). The daylight duration in December in Nagasaki is 10 hours, with an average of 3 hours of sunshine per day. The average wind speed in December is 15 km/h (9 mph), and the humidity level is around 69%.

The water temperature in Nagasaki in December ranges from 16°C to 19°C (61°F to 66°F). At the beginning of the month, the average temperature is around 19°C (66°F), shifting to 18°C (64°F) by mid-December and reaching 17°C (63°F) in the last ten days. Overall, the average sea temperature in Nagasaki for December is 18°C (64°F).

Sea Temperature in December in Nearby Cities

Frequently Asked Questions About Water Temperatures in December in Nagasaki

What is the sea temperature in Nagasaki in December?

The water temperature in the Seto Inland Sea in Nagasaki in December ranges from 16°C to 19°C (61°F to 66°F).

Is it possible to swim in the Sea of Japan in Hokkaido in December?

The average sea temperature in Hokkaido in December is 5°C (41°F), and the air temperature is 2°C (35°F), so swimming in such conditions is extremely dangerous due to the risk of hypothermia and cold shock. Only experienced winter swimmers with proper preparation should attempt it.