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Tomie Sea Temperature in September

Nagasaki, Japan

August Tomie year-round → October

Average sea temperature for Tomie, Japan across September, based on 10 years of daily readings.

Average

27.64° C

High

30.08° C

Low

24.76° C

This water temperature is comparable to that of a swimming pool, but it might be higher than most open water swimmers prefer for serious swimming. Make sure to drink plenty of water before and after swimming and don't wear a wetsuit to avoid overheating.

September is the 2nd warmest of 12 months at Tomie. On average the water sits 5.8° than the year-round mean of 21.81° C.

Compared to August, September is 0.9° cooler than (28.54° C in August). By October the water is usually 25.33° C.

Tomie Day-by-Day Water Temperature in September

10-year low, average and high

23.5° C
25.4° C
27.3° C
29.1° C
31.0° C
1
5
10
15
20
25
30
Day-by-day low and high band with the 10-year daily average through September. Range Average

Each vertical bar above is one day of September. The shaded band covers the range the water has reached on that day across the last 10 years — the lowest reading at the bottom, the highest at the top. The line running through the bars is the daily average over those 10 years, so you can see the typical shape of the month at Tomie.

A narrow band means the temperature on that day has stayed close to the average year on year. A taller band means it has swung more, often because of changeable weather around that time of year. Hovering a day pulls up its low, average, and high.

September Water Temperature Table for Tomie

10-year daily averages

Day Average Low High
September 1 28.47° C 26.63° C 29.46° C
September 2 28.46° C 26.91° C 29.33° C
September 3 28.4° C 27.04° C 29.43° C
September 4 28.43° C 27.11° C 29.37° C
September 5 28.3° C 27.22° C 29.31° C
September 6 28.15° C 27.27° C 29.38° C
September 7 28.15° C 27.08° C 29.48° C
September 8 28.03° C 26.62° C 29.55° C
September 9 28° C 26.49° C 29.69° C
September 10 28.02° C 26.48° C 29.74° C
September 11 27.97° C 26.5° C 29.79° C
September 12 27.87° C 26.36° C 29.89° C
September 13 27.78° C 26.47° C 29.92° C
September 14 27.81° C 26.52° C 30.01° C
September 15 27.87° C 26.67° C 29.8° C
September 16 27.91° C 26.74° C 29.89° C
September 17 27.85° C 26.37° C 30.08° C
September 18 27.7° C 26.02° C 30.07° C
September 19 27.48° C 25.55° C 29.88° C
September 20 27.41° C 25.48° C 29.87° C
September 21 27.3° C 25.57° C 29.9° C
September 22 27.1° C 25.87° C 29.24° C
September 23 27.03° C 25.86° C 29.05° C
September 24 26.94° C 25.57° C 28.92° C
September 25 26.86° C 24.9° C 28.84° C
September 26 26.88° C 24.87° C 28.98° C
September 27 26.87° C 24.93° C 28.99° C
September 28 26.76° C 24.82° C 28.71° C
September 29 26.68° C 24.76° C 28.58° C
September 30 26.61° C 24.76° C 28.6° C

Where September Sits in the Year

September highlighted

12.5° C
17.5° C
22.5° C
27.5° C
32.5° C
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
17.69° C
16.53° C
16.9° C
17.96° C
19.69° C
22.81° C
26.47° C
28.54° C
27.64° C
25.33° C
22.5° C
19.66° C
10-year monthly history for Tomie. Bars span historical low to high; the line marks the monthly average. Range Average
January → February → March → April → May → June → July → August → September → October → November → December →

Nearby Locations in September

Compare other Japan water for the same month

Tomie Location

32.6167, 128.7670

32.61670, 128.76700 View on OpenStreetMap →

Tomie sits at 32.6167°N, 128.7670°E, on the coast of Nagasaki, Japan. The marker on the map shows the spot the readings on this page come from. It usually sits a short distance from the town centre, out on the open water itself, so the numbers stay tied to the coast rather than a generic point inland.

Coastlines bend, headlands focus the water, and the temperature can run noticeably differently between two beaches that look close together on a map. Comparing nearby locations is a quick way to see how local geography is shaping the readings.

Nearest locations to Tomie