Weather in Hobart in September

Shoulder season. September sits in between. You will get good days and you will lose some. Highs sit at 14 °C and the day is short; this is an indoors-with-excursions month, not an outdoors-all-day one.

September ranks 9 of 12 in Hobart: past the worst of the year but short of January, which is the month to book if the dates are open.

Rain on 13 days, 1 of them heavy. Enough to need a plan B, not enough to need a plan around it. Layers, and a genuinely waterproof outer — at 14 °C the difference between a good day and a miserable one is entirely down to what you are wearing.

What the averages hide

The averages here are honest — no hidden extremes worth planning around. Across the twenty years measured, the hottest September day reached 22.5 °C and the coldest night fell to 2.4 °C, and the wettest single day dropped 40 mm — roughly 60% of the month's rain in one day.

September is moderately variable: 29 mm in the driest year against 149 mm in the wettest, around an average of 67 mm. Roughly two Septembers in three land near that average, and the third does something else entirely.

Wind is light at 15.8 km/h, so the temperature on the page is close to the temperature on your skin, and humidity runs at 80%, which at 14 °C means damp rather than muggy — the kind of cold that gets into a coat and stays there.

How September sits in the year

The month is on the way up: 1.7 °C warmer than August, and October adds another 1.8 °C. Late in the month feels noticeably different from the start of it, which is worth knowing if the trip is short.

Daylight in September

11.7 hours of daylight, gaining 1.4 hours across the month. That is between Hobart's extremes of 15.3 and 9 hours, so days are long enough not to constrain the plan.

Sea temperature

The sea sits at about 12.4 °C in September — too cold to swim without a wetsuit. The sea peaks at 16.6 °C in February and bottoms out at 12.4 °C — water lags the air by a month or two, which is why the best swimming often comes after the best weather.

How busy it gets

Off season. The genuine off season: cheapest by a distance, with the caveat that some tours and restaurants close entirely.

Crowd levels are estimated from climate desirability and school-holiday calendars, not from visitor numbers.

September in Hobart versus nearby

If Hobart is one option among several, the nearby comparison is worth making. Launceston is close enough to be a coin toss — within a degree on temperature, the same number of rain days. Devonport is close enough to be a coin toss — within a degree on temperature, the same number of rain days.

So: September is a compromise. January is 27 points better and is what Hobart is actually like at its best — worth moving the trip for if that is possible, and worth adjusting expectations for if it is not.

Every month in Hobart

See all twelve months in Hobart, or where else to go in September.