Sasebo Water Temperature

(Today) 2025

18.1°C / 64.5°F

The water will feel medium. The water will feel a bit chilly in just bathers / swimming costume. If you plan on wearing a wetsuit 4/3mm should be thick enough.

Current weather

18°C / 65°F
(overcast clouds)
Partly cloudy
Wind
5 mph
Humidity
94%

The measurements for the water temperature in Sasebo, Nagasaki are provided by the daily satellite readings provided by the NOAA. The temperatures given are the sea surface temperature (SST) which is most relevant to recreational users.

*Live data may vary from satellite readings for a number of reasons. These include local factors, depth of smapling and time of day.

Water temp by month

Monthly average max / min water temperatures

The graph below shows the range of monthly Sasebo water temperature derived from many years of historical sea surface temperature data.

Sasebo average maximum / minimum water temperatures
Maximum and minimum monthly sea temperatures in Sasebo
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C 14.1 13.3 13.4 13.8 15.7 19.5 23 25.9 23.7 22.4 19.5 15.6
Max °C 18 15.5 15 17.5 20.9 24.2 27.6 29.2 28.3 25.4 23.2 20.8
Min °F 58.9 56.8 56.8 58.3 62.3 68.9 75.2 79.9 76.5 73.5 68.5 62.2
Max °F 62.8 59 58.4 62 67.5 73.6 79.8 83.2 81.1 76.5 72.2 67.4

The warmest water temperature is in August with an average around 81.5°F / 27.5°C. The coldest month is March with an average water temperature of 57.6°F / 14.2°C.

7 day tide forecast for Sasebo

SatSunMonTueWedThuFri
  • Low 5:02am
    (1.25m)
  • High 10:27am
    (2.4m)
  • Low 5:04pm
    (0.39m)
  • High 11:59pm
    (2.41m)
  • Low 5:48am
    (1.34m)
  • High 11:11am
    (2.3m)
  • Low 5:52pm
    (0.52m)
  • High 12:54am
    (2.33m)
  • Low 6:45am
    (1.41m)
  • High 12:08pm
    (2.2m)
  • Low 6:49pm
    (0.67m)
  • High 1:59am
    (2.29m)
  • Low 7:59am
    (1.4m)
  • High 1:25pm
    (2.12m)
  • Low 7:59pm
    (0.79m)
  • High 3:07am
    (2.31m)
  • Low 9:20am
    (1.28m)
  • High 2:56pm
    (2.13m)
  • Low 9:16pm
    (0.86m)
  • High 4:07am
    (2.39m)
  • Low 10:27am
    (1.04m)
  • High 4:20pm
    (2.26m)
  • Low 10:30pm
    (0.88m)
  • High 4:58am
    (2.5m)
  • Low 11:20am
    (0.74m)
  • High 5:31pm
    (2.47m)
  • Low 11:34pm
    (0.87m)
7 day tide times for Sasebo

*These tide times are estimates based on the nearest accurate location (Sasebo, Nagasaki, Japan) and may differ by up to half an hour depending on distance. Please note, the tide times given are not suitable for navigational purposes.