Marigot Bay weather in September 2025

Q: How hot is it in Marigot Bay in September?

Daytime temperatures usually reach 30°C in Marigot Bay in September with high heat and humidity, falling to 24°C at night.

Q: How sunny is it in Marigot Bay in September?

There are normally 8 hours of bright sunshine each day in Marigot Bay in September - that's 62% of daylight hours.

Q: How warm is the sea around Marigot Bay in September?

The average sea temperature around Marigot Bay in September is 29°C.

Q: Does it rain in Marigot Bay in September?

There are usually 24 days with some rain in Marigot Bay in September and the average monthly rainfall is 259mm.

Q: What is the chance of a cyclone in Marigot Bay in September?

On average 1.1 days in September in Marigot Bay are likely to be affected by the passage of one or more tropical storms.

Expect 30°C daytime maximum temperatures in the shade with on average 8 hours of sunshine per day in Marigot Bay in September. Check more long-term weather averages for Marigot Bay in September before you book your next holiday to St Lucia in 2025/2026.

30
30°C max day temperature
8
8 hours of sunshine per day
24
24 days with some rainfall
24
24°C min night temperature
12
12 hours of daylight per day
H
High heat & humidity
259
259 mm of monthly rainfall
11
11+ (Extreme) UV index
29
29°C sea temperature

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The September weather guide for St Lucia (Marigot Bay) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C / mm) | Imperial (°F / inches)

More about St Lucia

How hot is it in Marigot Bay in September?

Daytime temperatures usually reach 30°C in Marigot Bay in September with high heat and humidity, falling to 24°C at night.

How sunny is it in Marigot Bay in September?

There are normally 8 hours of bright sunshine each day in Marigot Bay in September - that's 62% of daylight hours.

How warm is the sea around Marigot Bay in September?

The average sea temperature around Marigot Bay in September is 29°C.

Does it rain in Marigot Bay in September?

There are usually 24 days with some rain in Marigot Bay in September and the average monthly rainfall is 259mm.

What is the chance of a hurricane in Marigot Bay in September?

On average 1.1 days in September in Marigot Bay are likely to be affected by the passage of one or more tropical storms.

Marigot Bay September sunrise & sunset times

Browse the sunrise and sunset times for Marigot Bay in September 2025. Select a month to view Marigot Bay sunrise and sunset times for the next 12 months.

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Date	Sunrise times	Sunset times
Monday, 1st September 2025	05:52	18:15
Monday, 15th September 2025	05:53	18:05
Tuesday, 30th September 2025	05:54	17:54

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St Lucia - quick facts
Flight time^✝	9 hours
Time difference	UK -4 hours
Language(s)	English
Currency	Eastern Caribbean Dollar
Electricity	G plug (230V)
Driving side	Left
Why visit?	Beaches Nature
Tourist info	Saint Lucia Tourism Authority