Weather in Grenada in March

How March compares

March is the 9th warmest month of the year in Grenada and ranks 31st of 134 destinations we compare for March - see where else is hot in March. Against London's average high of 10.5°C in March, Grenada is 16.6°C warmer by day and 21.6°C warmer at night.

Daytime and night-time in March

The typical March day in Grenada peaks at 27.1°C, but that is an average: the warmest 10% of days reach 28.1°C or more. About 100% of days top 25°C. Nights average 24.9°C; one night in ten drops to 24.0°C or lower, so pack a layer for evenings. Between 1991 and 2020 the hottest March day here reached 29.6°C (2017-03-29) and the coldest night 22.8°C (1998-03-31).

Rain in March

Some rain (4-8 rainy days): about 8 days with 1 mm or more, 29 mm in total. Year to year it varies a lot - the wettest March was 2011 with 78 mm, the driest 2001 with 3 mm. Humidity averages 76%.

Sea temperature in March

The sea averages 26.7°C - warm enough to swim (22°c+). Depending on the year it ranges from 26.3°C to 27.1°C. For the warmest sea here, come in September (29.2°C).

Sunshine and daylight

Around 6.7 hours of sunshine a day (estimated from cloud cover), 11.9 hours of daylight: the sun rises about 06:14 and sets about 18:18 local time in mid-March. Average cloud cover is 43%.

Is March a good time to visit Grenada?

Yes - it is one of the better months: hot days, manageable rain. The best months for Grenada on our scoring are March, February, April; months averaging 25°C or more: Jan, Feb, Mar, Apr, May, Jun, Jul, Aug, Sep, Oct, Nov, Dec.

Steady warmth, with little relief at night

Expect warmth that lasts into the evening, rather than hot afternoons followed by a cool-down. March is not among Grenada's hottest months, but humidity of 76% can make the air feel close, so the temperature alone does not tell the whole story. Loose, breathable clothing makes more sense than heavy layers, and air conditioning is worth prioritising if warm bedrooms bother you. Keep more active plans away from midday and leave room for shade breaks. Compared with London's March daytime high of 10.5°C, this is a substantial change of climate. It suits travellers who want consistent warmth better than those hoping for crisp evenings or mild walking weather.

Useful sunshine, but leave plans flexible

March brings about 6.7 hours of sunshine within 11.9 hours of daylight, so there is useful time outdoors without a promise of clear skies throughout the day. About 8 rainy days means rain belongs in your plans, even in a month that scores well overall. Keep a light waterproof handy and avoid making every outdoor activity depend on an entirely dry day. The rainy-day figure does not tell you how long each wet spell lasts, so it is better to stay flexible than assume rain will always pass quickly. Sun protection still matters, and a mix of swimming, shaded breaks and unhurried outdoor time is a sensible approach.