Austral winter · The driest month

A trip to Mauritius in September: climate, activities and prices

The driest month of the year: almost always clear skies, whale watching in full swing and ideal light for photography.

17-25°Cair23°Csea35 mm/ 5 daysNonecyclone

September is the driest month of the year in Mauritius, with just 35mm of rain over an average of 5 days. The weather is at its best: 17-25°C, water at 23°C, almost always clear skies and a steady trade wind. It's also one of the best months to spot humpback whales, still present off the south-west coast.

As for prices, September marks the end of the high season. 5-star hotels start cutting their rates from 15 September (once European schools go back), which opens an appealing window for flexible travellers who want to avoid both the August crowds and the Christmas price rise.

For photography and scenic flights (helicopter, seaplane, microlight), September is probably the best month of the year. The low late-winter light shows off Le Morne's underwater waterfall and the Seven Coloured Earths of Chamarel with a clarity that is hard to match at any other time.

Climate in detail

Conditions in Mauritius in September

Air temperature

17-25°C

Average min - max

Sea temperature

23°C

Cool

Monthly rainfall

35 mm

5 days of rain

Cyclone risk

None

Outside cyclone season

Marine wildlife in September · humpback whales spotted on whale-watching trips ( July to October ) + spinner dolphins resident in Tamarin Bay year-round.

To do this month

5 standout activities in September

A selection of the activities best suited to this month's conditions. Prices and availability verified as of the update date below.

Baleine à bosse en saut hors de l'eau lors d'une sortie d'observation des cétacés

Dauphins Maurice

7 sorties nage avec dauphins long-bec et observation baleines à bosse dès 53 € depuis Grande Rivière Noire ( 5/5 sur 11 avis Manawa, Dolswim ). Baleines juillet à octobre.

From €53See

Kitesurfer sur le lagon turquoise de l'île Maurice, voile en hauteur, planche en glisse

Kitesurf Maurice

6 formules de kitesurf au Morne, à Bel Ombre et à Anse la Raie : cours de 2 h dès 85 € ( 2 élèves max par moniteur ), stages, privé, location dès 80 €.

From €80See

Hélicoptère survolant Le Morne et le lagon turquoise de l'île Maurice

Hélicoptère Maurice

4 vols hélicoptère dès 729 € en panoramique avec transferts hôtel à 5 516 € en privatisation totale. Vols ciblés cascade sous-marine 1 350 à 3 550 €. 3 hélistations.

From €729See

Vue aérienne du Morne et du lagon depuis un hydravion à l'île Maurice

Hydravion Maurice

3 vols hydravion dès 180 € en ultralight Manawa Belle Mare ( 5/5 sur 9 avis ) à 220 € en Cessna privé GetYourGuide. Décollages côte est, île aux Cerfs et Montagne du Lion.

From €180See

Vue aérienne iconique du Morne Brabant et de la cascade sous-marine de l'île Maurice, illusion d'optique

Cascade sous-marine Maurice

2 vols hélicoptère pour voir l'illusion d'optique de la cascade sous-marine du Morne dès 1 350 € au forfait partagé ( 5/5 sur 5 avis GetYourGuide ).

From €1350See

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Frequently asked questions

Your questions about Mauritius in September

Is September a good month to visit Mauritius?

It's one of the 2 or 3 best months of the year: the driest (just 35mm of rain over 5 days), with almost always clear skies, a steady trade wind and mild temperatures. Humpback whales are still around until late September, hotel rates start falling from the 15th (the end of the European high season), and there is no cyclone risk.

What's the weather like in Mauritius in September?

The most stable weather of the year: 17-25°C, water at 23°C, just 35mm of rain spread over 5 days on average (often at the start or end of the month) and no cyclone risk. A steady south-easterly trade wind of 20-30 knots makes it ideal for kitesurfing, sailing and other wind sports.

What are the best things to do in Mauritius in September?

Humpback whale watching from Grande Rivière Noire (€66 with Dolswim, worth booking ahead as the season winds down in late September or early October), a helicopter flight over the underwater waterfall (€1,350 shared, rated 5/5 from 5 GetYourGuide reviews, with ideal light for photos in September), kitesurfing lessons at Le Morne (peak wind), diving at Blue Bay (€50, best visibility of the year) and a hike up Piton de la Petite Rivière Noire (€42, the island's highest point).

Are the whales still around in Mauritius in September?

Yes, September remains an excellent month for humpback whale watching in Mauritius. Mothers with calves are still active off the south-west coast. The statistical peak is in August, but morning trips in September still have high sighting rates. From October, the whales start heading back to the Southern Ocean. A Dolswim trip costs €66 (rated 5/5 from 38 Manawa reviews).

Mauritius in September or October: which is better?

September is drier (35mm compared with 35-50mm in October, depending on the source) and the whales are still out in force. In October the sea warms up again (24°C compared with 23°C) and the flowering season returns. For whales, photography and sailing, choose September; for swimming and landscapes in bloom, October. Both are excellent choices.

Do hotel rates drop in September in Mauritius?

Yes, noticeably, from 15 September as the European school holidays end. 5-star resorts drop from €600-700 in August to €380-450 in the second half of September. 3-star hotels in the north (Maison du Nord, Toparadis, Résidence Peramal) cost around €75-100 a night for two. The second half of September offers excellent weather for the money.

Last updated: 13 October 2026 (October 2026). 30-year average climate data, Port-Louis station. Prices and availability verified as of the writing date.