Saint John's Weather in September

September weather

September feels hot, sticky and often cloudy in Saint John's. The high is 29°C and the low is 28°C, with humidity at 79%. Rain falls on 21 days, so expect showers to interrupt some plans. There's still an average of 6.3 hours of sun each day.

The sea and sheltered spots around town can still suit a swim between showers. For sightseeing, keep plans flexible: you can duck into the Museum of Antigua and Barbuda or browse the shops around Heritage Quay when rain sets in. Long walks in the open sun may feel tiring, and September is a poor choice if you want reliably dry beach days.

Events and crowds

There's no major fixed September festival in Saint John's. Antigua's Carnival, with its parades and music, usually takes place in late July and early August, so you'll have missed it. September is also within the Atlantic hurricane season, when storms can disrupt travel.

If you hate crowds, this is a quieter time than the winter high season. Cruise-ship visitors can still fill the waterfront when ships are in, but the city is generally less busy than from January to April. Prices are often lower than in those popular months, though weather-related disruption is a trade-off.

Make flexible plans

Travelling with kids? Keep a rainy-day stop in your plans, rather than counting on a full beach day.

September is wetter than August, which gets 146 mm of rain, but drier than October, with 181 mm. The rain can come in bursts, so a shower doesn't always end the day. Still, don't count on hiking or outdoor sightseeing staying dry.

For an easy local fallback, head to the Museum of Antigua and Barbuda on Long Street. It's close to the centre, so you can take shelter without losing much time. Check whether it's open before setting out, especially if your visit falls on a weekend.