Mauritius in September is one of the best choices of the year: it is the driest month of the year in Port Louis (17 mm (0.7 in)), temperatures are climbing (27.7 °C (82 °F) in the afternoon, 19.4 °C (67 °F) at night), and humpback whales are still offshore. The only caveats: the wind stays strong in the east and south, and the water has not yet regained the warmth of the southern summer.
Here is the weather in Mauritius in September coast by coast, what you can do and the points to plan for. To compare with other months, see our page on the best time to visit Mauritius.
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Mauritius in September: key facts
- Verdict: ✅ excellent, dry and sunny
- Port Louis: 27.7 °C (82 °F) in the afternoon, 19.4 °C (67 °F) at night, 17 mm (0.7 in) of rain
- Central plateau (Vacoas): 23.1 °C (74 °F), 16.2 °C (61 °F) and 77 mm (3.0 in)
- Highlights: whale season, hiking, kitesurfing
- Drawbacks: trade winds in the east and south, evenings still cool
- Outside the cyclone season (the UK FCDO says it usually runs from November to May)
Weather in Mauritius in September
September closes the southern winter: the air warms up gradually, but the dry season is still here. As relief and exposure to the south-east trade winds matter more than distance, the table compares three official stations.
| Station | Max | Min | Rain |
|---|---|---|---|
| Port Louis (north-west) | 27.7 °C (82 °F) | 19.4 °C (67 °F) | 17 mm (0.7 in) |
| Vacoas (central plateau) | 23.1 °C (74 °F) | 16.2 °C (61 °F) | 77 mm (3.0 in) |
| Rodrigues | 25.4 °C (78 °F) | 19.3 °C (67 °F) | 44 mm (1.7 in) |
Destination de Voyage calculation based on these normals: between July and September, the average maximum gains 1.0 °C (2 °F) in Port Louis (26.7 → 27.7 °C) and rainfall falls by about 35% on the central plateau (118 → 77 mm). The rainfall gap between the west coast and the centre therefore narrows in September, which makes trips inland more pleasant than in the depths of winter.
Which coast to choose in September
- West (Flic en Flac, Tamarin, Le Morne): the driest and the most sheltered from the trade winds, with sunsets over the sea and the departure points for whale-watching trips.
- North (Grand Baie, Trou aux Biches, Cap Malheureux): a climate close to the west, the liveliest area, with excursions to the northern islets.
- East (Belle Mare, Trou d’Eau Douce): exposed to the south-east trade winds, with more cloud and a rougher sea in the southern winter.
- South (Gris-Gris, Bel Ombre): a wild coast, damp and windy at this time of year, best discovered on a day trip.
Things to do in Mauritius in September
Humpback whales
September is part of the humpback whale passage season (July to about October) off the west coast. Trips leave mostly from Tamarin and Rivière Noire. Choose an operator that respects approach distances.
Hiking and the interior
With less rain in the centre than in July, September suits trips in the Black River Gorges National Park, Chamarel, Le Morne Brabant or Pieter Both. Start early and take a warm layer for the altitude.
Kitesurfing and wind sports
The trade winds still blow steadily in September. Le Morne, Pointe d’Esny and Belle Mare remain the reference spots; go through a school if you are a beginner.
Beach and lagoons
Often clear skies in the west and north make lazing on the beach pleasant. The water stays cooler than in the southern summer, but swimming in the sheltered lagoons is easy. For diving, conditions are generally considered better from October.
What to avoid in September
- Choosing the east coast for a 100% beach stay if you do not like wind
- Setting off without a sweater for the evenings and the central plateau
- Forgetting to check the dates of religious festivals if you want to attend
Events in September
| Period | Event | Good to know |
|---|---|---|
| July to about October | Humpback whale passage | West coast (Tamarin, Rivière Noire) |
| Late August or September (lunar calendar) | Ganesh Chaturthi | Hindu festival; date varies from year to year |
Booking in September
September falls outside the main northern-hemisphere summer holidays, which leaves more choice of dates. The most popular west-coast hotels are still worth booking early.
What to pack
- Light outfits and a sweater for the evening
- A windbreaker for the east, the south and the central plateau
- Walking shoes
- Sunscreen, hat, sunglasses
- Mask and snorkel for the lagoons
Before you go
For visas, passports and other formalities for US and UK citizens, see the entry requirements for Mauritius in our country guide. The UK FCDO notes that you must fill in the Mauritius All in One travel form online before you arrive, and advises checking that water-sports operators (including kitesurfing and windsurfing schools) hold a valid permit from the Ministry of Tourism (GOV.UK, updated 19 October 2026). Time difference: Mauritius is on UTC+4 all year; in September it is 3 hours ahead of London (UK summer time, UTC+1) and 8 hours ahead of New York (EDT, UTC-4).
If September does not suit you
Neighbouring months: Mauritius in August is a little cooler; Mauritius in October is warmer, with a warming sea.
Other destinations in September: compare with the Seychelles, Bali or Tanzania. All our ideas: where to go in September.
To plan the rest of your stay, see our Mauritius travel guide.
Frequently asked questions
What is the weather like in Mauritius in September?
Dry and sunny on the west and north coasts: 27.7 °C (82 °F) in the afternoon, 19.4 °C (67 °F) at night and 17 mm (0.7 in) of rain on average in Port Louis. The central plateau is cooler and wetter (23 °C (73 °F), 77 mm (3.0 in) in Vacoas).
Is September a good month for Mauritius?
Yes, it is one of the best: the driest month of the year in Port Louis and rising temperatures.
Can you swim in Mauritius in September?
Yes, in the lagoons of the west and north. The water is still a little cool compared with the southern summer, but pleasant in the warm hours.
Can you still see whales in September?
Yes, September is part of the humpback whale passage season, from July to about October, off the west coast.
Are there cyclones in September?
No. The UK FCDO says the tropical cyclone season usually runs from November to May (GOV.UK, updated 19 October 2026).
September or October for Mauritius?
September is a little cooler and windier, in the middle of the whale season; October is warmer and the sea warms up. Both are dry in the west.
Our sources
- World Meteorological Organization (World Weather Information Service): Port Louis station normals
- NOAA / WMO: 1991-2020 climate normals for the Vacoas station
- Mauritius Meteorological Services: Rodrigues normals
- UK FCDO, foreign travel advice for Mauritius (GOV.UK, updated 19 October 2026), read on 26 October 2026: cyclone season, water sports, entry form. Time rules: GOV.UK, When do the clocks change, and NIST, Daylight Saving Time
- Data and calendar already published on our page the best time to visit Mauritius
- Our methodology
Updated November 2026.