Grand Baie weather in May
May in Grand Baie: warm, a little rain, with clean air — an excellent time to visit.
Updated September 2026 · climate normals from ERA5 reanalysis
#6 of 12 months in Grand Baie · #210 of 1413 destinations to visit in May · comfort 89/100 (tier A)
- Days
- 27°C
- Nights
- 23°C
- Wet days
- 8
- Sun
- 9.9 h
- Humidity
- 76%
- Daylight
- 11 h

Traveller notes on Grand Baie in May
Other months in Grand Baie
November is the front of the Mauritian summer, and regulars value it for what has not arrived: the humidity and the rain do not really kick in until December, and the cyclone season rarely starts before then either. October is named the driest and sunniest month with November and early December just behind it. They also say the coasts stop differing at this point in the year - the shore you choose matters in winter, not now - though the north-west around Grand Baie is where they report clear mornings running late into the afternoon. Their figures run hotter than ours: they say low 30s climbing through the month, our row has 27.8C reading as 30C at 73 percent humidity. The record: 28.2mm across 8.3 days, 11.9 hours of sun and a 26.8C sea.
August is Mauritian winter and the advice regulars give is entirely about which coast you pick. The south-easterly trades blow hard now, so the east and south feel cool and windy while the north, north-west and west - Grand Baie among them - get the best of it. Our row's 29.7 kph is that wind measured on the sheltered side. Days are fine at 24.6C; evenings are the part people underpack for, and a wrap earns its place at 20.5C reading as 19C. The wind holds until about mid-September before easing ahead of the summer rains, and late August is already warmer. Rain is minimal at 13.8mm across 3.6 days. The record: humidity 71 percent, 10.4 hours of sun, a 24.7C sea and AQI 39.
September in Mauritius is late winter: warm, sunny, and with October the driest and sunniest part of the year. The month improves as it runs - early September still carries strong trade winds, which ease towards the end - and those winds are why the north and west are the side to be on, Grand Baie among them, while the east takes the brunt of them. Regulars describe the north-west in September as warm to hot days with little rain and less humidity than midsummer. Our row still has 28.8 kph of wind against a 25.2C day and a 24.7C sea. The record: 20.8C nights, 2.6 precipitation days carrying 8.3mm and 11 hours of sun.
Mauritius forum threads are direct that January is hot and humid summer, often pushing past 30C, and sits right in the wettest and peak cyclone stretch of the year (January-March). The typical rain pattern described: a burst of maybe 15 minutes followed by a couple of clear hours before the cycle repeats - though a cyclone passing nearby can mean several consecutive rainy days confined largely to the hotel. Posters were clear that direct cyclone hits are rare even in peak season, and outcomes vary widely year to year - some visitors get lucky with little rain, others hit a genuinely wet stretch, with a quality resort and flexible plans the standard recommendation either way.
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Grand Baie climate normals — May
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Grand Baie in May
How busy the place itself is — school and mass holidays, the months an editor tagged, and how sought-after the weather makes them. Never part of the comfort score.
Shoulder seasonschool holidays in 3 of the markets that fill it, an ordinary month(estimated)
Peak crowdsBusyShoulder seasonQuiet
Best months for Grand Baie's weather
Ranked by this destination's own climate comfort score across the year — a different thing from how busy it gets (see Crowds above).
Fair weatherGrand Baie's weather doesn't swing hard through the year — comfort stays fairly steady in every month.
What's on in Grand Baie in May
Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.
- Season
The south-east trades
15 May – 31 Oct · usuallyWind seasonThe trade winds blow through the winter and the island reorganises around them. Grand Baie sits on the sheltered north coast, which is why the dive boats and the island-hopping trips leave from here.
- Hazard
Cyclone season
15 Nov – 15 May · usuallyThe Mauritius Meteorological Services run their cyclone warning classes from mid-November to mid-May. A class III shuts the island down, shops and boats included, usually for a day or two; January to March is the likeliest stretch. Source ↗
Nearby, and something's on
Within 300 km of Grand Baie — a day trip or a short hop — with something on this month. Never part of the comfort score.
Where is Grand Baie?
Grand Baie in May — FAQ
- Is May a good time to visit Grand Baie?
- May in Grand Baie: warm, a little rain, with clean air — an excellent time to visit. It ranks #6 of 12 months for Grand Baie on SeasonMap's comfort score (89/100).
- What is the weather like in Grand Baie in May?
- In May, Grand Baie averages a daily high of 26.7°C and a low of 23.1°C, with about 34.1 mm of rain over roughly 7.5 rainy days.
- What is the air quality in Grand Baie in May?
- Grand Baie has a mean US Air Quality Index of about 36 in May.
Within 300 km: Port Louis' Champ de Mars racing season around 1 Apr – 30 Nov.