When to go · Saint Helena, Ascension and Tristan da Cunha

Saint Helena, Ascension and Tristan da Cunha in September

Mixed month. Cool; Tristan's main annual relief voyage often sails around now (check).

Key facts

Plan around it

Verdict

MixedVoykit month rating for Saint Helena, Ascension and Tristan da Cunha

Cool; Tristan's main annual relief voyage often sails around now (check).

September is rated mixed. These months rate higher:

Saint Helena coast · Jamestown, Rupert's, Sandy Bayfine
Mild and dry in the rocky valleys, 20–28 °C (68–82 °F); cooler and breezier from June to October.Mild and dry in the rocky valleys, 68–82 °F (20–28 °C); cooler and breezier from June to October.
Saint Helena uplands · Longwood, Diana's Peak, Blue Hill, Levelwoodcool
Cooler, misty and wetter at 500–800 m; bring a fleece all year.
Ascension · Georgetown, Green Mountainfine
Hot, dry lava lowlands; cloud forest on Green Mountain.
Tristan da Cunha · Edinburgh of the Seven Seascool
Cool, windy and wet all year; ships cannot land in heavy swell.
Jamestown22 °C (72 °F) / 17 °C (63 °F), 3 rain days72 °F (22 °C) / 63 °F (17 °C), 3 rain days
Tristan da Cunha20 °C (68 °F) / 10 °C (50 °F), 12 rain days68 °F (20 °C) / 50 °F (10 °C), 12 rain days

Weather, crowds and prices for any two months in Saint Helena, Ascension and Tristan da Cunha, side by side.

First month

Second month

September: Cool; Tristan's main annual relief voyage often sails around now (check).

January: Peak season: warm, whale sharks in the bays, extra flights (check); book early.

Saint Helena, Ascension and Tristan da Cunha: figures are long-term averages from this guide, not a forecast.