Henderson Island Sea Temperature in September

Average sea temperature for Henderson Island, Pitcairn Islands across September, based on 10 years of daily readings.

Average

22.88° C

High

23.83° C

Low

21.7° C

Water at this temperature is very pleasant to swim in. If you tend to wear a wetsuit when swimming, you might consider removing it now to avoid the body overheating.

September is the 12th warmest of 12 months at Henderson Island. On average the water sits 2.1° than the year-round mean of 24.97° C.

Compared to August, September is 0.1° about the same as (22.94° C in August). By October the water is usually 23.25° C.

Henderson Island Day-by-Day Water Temperature in September

10-year low, average and high

21.0° C

21.9° C

22.8° C

23.6° C

24.5° 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 Henderson Island.

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 Henderson Island

10-year daily averages

Day	Average	Low	High
September 1	22.81° C	21.73° C	23.77° C
September 2	22.83° C	21.77° C	23.78° C
September 3	22.81° C	21.75° C	23.77° C
September 4	22.77° C	21.76° C	23.48° C
September 5	22.79° C	21.81° C	23.6° C
September 6	22.81° C	21.79° C	23.73° C
September 7	22.75° C	21.75° C	23.58° C
September 8	22.73° C	21.7° C	23.51° C
September 9	22.74° C	21.78° C	23.49° C
September 10	22.79° C	21.85° C	23.5° C
September 11	22.85° C	21.91° C	23.62° C
September 12	22.89° C	21.94° C	23.77° C
September 13	22.84° C	21.92° C	23.69° C
September 14	22.86° C	21.93° C	23.59° C
September 15	22.88° C	21.98° C	23.6° C
September 16	22.81° C	21.9° C	23.49° C
September 17	22.79° C	21.91° C	23.47° C
September 18	22.84° C	21.93° C	23.49° C
September 19	22.86° C	21.9° C	23.54° C
September 20	22.92° C	21.84° C	23.68° C
September 21	22.99° C	21.94° C	23.83° C
September 22	22.94° C	21.95° C	23.76° C
September 23	22.93° C	22.04° C	23.65° C
September 24	22.9° C	22.11° C	23.56° C
September 25	22.89° C	22.05° C	23.51° C
September 26	22.96° C	21.99° C	23.63° C
September 27	23.03° C	22.2° C	23.61° C
September 28	23.09° C	22.54° C	23.53° C
September 29	23.18° C	22.48° C	23.56° C
September 30	23.12° C	22.46° C	23.58° C

Where September Sits in the Year

September highlighted

20.5° C

22.9° C

25.3° C

27.6° C

30.0° C

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

26.4° C

27.21° C

27.23° C

26.56° C

25.6° C

24.33° C

23.55° C

22.94° C

22.88° C

23.25° C

24.32° C

25.39° C

10-year monthly history for Henderson Island. 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 Pitcairn Islands water for the same month

Adamstown September →

Henderson Island Location

-24.3744, -128.3271

Open this location on OpenStreetMap →

-24.37438, -128.32711 View on OpenStreetMap →

Henderson Island sits at -24.3744°N, 128.3271°W, on the coast of Pitcairn Islands. 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 Henderson Island

Adamstown, 195 km SW