Winter in Port Louis feels pretty mild compared to a lot of other places. You won’t see freezing temperatures or snow here.
Average daytime highs hover around 76–77°F (24–25°C). Nights cool off to about 67°F (19–20°C), so the season stays comfortable for outdoor activities and relaxed evenings.
Rainfall drops during these months, and July is often the driest. The skies clear up, and humidity drops compared to the wetter summer season.
This change brings a calmer atmosphere. Steady breezes keep the air fresh but not overwhelming.
The sea stays warm enough for swimming. Daylight hours give you plenty of time to enjoy the coast.
With stable weather and fewer wet days, winter offers a nice balance of comfort and activity. It’s great for both sightseeing and time by the water.
Winter Temperature Patterns in Port Louis
Winter in Port Louis brings mild, steady weather. You’ll notice moderate warmth during the day and cooler nights, with only small shifts as the season moves along.
The city’s low elevation near sea level helps keep temperature extremes rare.
Average Daytime and Nighttime Temperatures
Daytime highs in Port Louis during winter usually sit between 75°F and 77°F (24°C–25°C). These temperatures rarely go above 81°F, so you can enjoy comfortable outdoor conditions without any intense heat.
Nights feel cooler but still mild. Lows average around 67°F to 68°F (19°C–20°C).
Temperatures almost never drop below 63°F. You probably won’t need heavy clothing—just a light sweater or long sleeves for the evenings.
Since the city sits at about 10 feet above sea level, the ocean really shapes the temperature. The daily range stays narrow compared to inland spots.
You’ll notice less fluctuation between day and night, which makes the climate easy to get used to.
Coldest and Warmest Winter Months
July and August are usually the coolest months in Port Louis. You’ll often see highs near 75°F (24°C) and lows around 67°F (19°C).
Even at its coldest, the city stays warmer than many tropical destinations in winter.
June tends to feel a bit warmer. Highs average closer to 77°F (25°C), and nights stay just above 68°F.
The difference is small. If you want the mildest weather, July and August are your best bet.
Port Louis doesn’t see sharp drops in temperature during winter. The gap between the warmest and coldest days is only a few degrees, so planning activities is simple.
Temperature Variation Throughout Winter
Winter in Port Louis changes gradually and predictably. Early June brings slightly warmer afternoons, and late August has the coolest mornings.
The shift is slow, so you won’t notice any sudden swings.
The daily range between highs and lows is usually less than 10°F. For example:
- Daytime highs: 75–77°F
- Nighttime lows: 67–68°F
The Indian Ocean helps keep this gap small.
August mornings feel the coolest, while June evenings are a touch warmer. These subtle differences show just how steady the climate is, giving you reliable comfort all season.
Rainfall and Precipitation Trends
Rainfall in Port Louis changes a lot between the wet and dry seasons. Heavier precipitation comes during the southern hemisphere summer, but winter brings lighter showers and fewer extremes.
Monthly Rainfall Amounts
Port Louis gets about 900–980 mm of precipitation each year. The winter months—June through August—are much drier than the summer.
In July, rainfall drops to its lowest, averaging only 25–30 mm. June and August see a bit more, with around 35–45 mm each.
The wettest months like January can go over 180 mm, which really shows the seasonal contrast.
During winter, you’re less likely to run into heavy downpours, though light showers do happen. Rain usually falls in short bursts, not long storms, so even rainy days often have sunny breaks.
| Month | Average Rainfall (mm) |
|---|---|
| June | 35–45 |
| July | 25–30 |
| August | 35–45 |
Number of Rainy Days
Even when total rainfall is low, the number of rainy days stays pretty steady. In winter, you’ll get about 13–15 days per month with at least a little precipitation.
These days usually bring light or moderate showers, not long stretches of rain. You might see a quick shower in the morning and then clear skies later.
A higher count of rainy days doesn’t mean it’s always wet. It just means brief showers happen regularly throughout the month.
Seasonal Precipitation Patterns
Port Louis has a tropical monsoon climate, so most rainfall happens in the warmer months.
From December to March, heavy showers and occasional storms take over, with totals much higher than in winter.
The June to August period is the driest time of year. Rainfall drops, and temperatures are milder, so outdoor conditions feel more comfortable.
If you’re planning travel or outdoor activities, winter gives you more predictable weather. You’ll see fewer interruptions from heavy rain and less risk of storms messing up your plans.
Humidity and Dew Point Levels
During winter in Port Louis, you get steady humidity and mild dew point levels. The cooler months bring less rain, but the air still holds enough moisture to keep that humid, tropical vibe.
Average Relative Humidity
In winter, relative humidity in Port Louis usually sits between 73% and 78%. The air often feels damp, even when temperatures drop a bit compared to summer.
You’ll probably notice mornings and evenings feel more humid, while afternoons get a little drier thanks to warmer temps and stronger breezes.
Humidity almost never drops to dry levels. The steady moisture in the air adds to that warm, sticky feeling, especially when the wind is light.
Visitors may find outdoor activities feel a bit heavier, but it’s still more manageable than in the wetter summer. Locals usually go for lighter clothing and try to do outdoor chores earlier in the day.
Seasonal Changes in Dew Point
The dew point in Port Louis during winter usually ranges from 18°C to 20°C (64°F to 68°F). At this level, the air feels humid but not too much.
Since dew point shows the real moisture in the air, this steady range explains why winter nights stay warm and why mornings can feel a bit muggy.
In summer, dew points climb higher. Winter brings a small drop, which means more comfortable sleeping and slightly less sticky afternoons.
The air never feels crisp or dry, though. Dew point levels confirm the tropical climate—moisture is always there, even in the driest months.
Cloud Cover and Sunshine Hours
Winter in Port Louis brings a mix of clear skies and some cloud cover. You’ll get fewer hours of direct sunshine than in summer, but there’s still plenty of daylight for outdoor plans.
Frequency of Overcast Days
Port Louis gets more cloud cover in winter than during the hotter months. The skies aren’t always gray, but you’ll see more partly cloudy and overcast days than in December or January.
June and July often have shorter stretches of continuous sunshine. Cloud layers move quickly, thanks to steady trade winds.
You might have alternating sunny and cloudy spells in the same day.
It’s rare for the city to stay fully overcast all day. Cloud cover usually comes in intervals, especially on cooler mornings and late afternoons.
Midday often clears up, so it’s easier to plan beach trips or sightseeing.
On average, expect 7 to 8 cloudy or partly cloudy days per month during winter. That’s enough to notice a difference from summer, but not enough to ruin most outdoor plans.
Average Daily Sunshine
Even with extra clouds, Port Louis still gets a decent amount of sunshine in winter. June averages about 7.0 hours of sunshine per day, and July and August are close to that.
For comparison, summer months like December get around 9.4 hours daily, so winter sunlight drops by about 2 hours.
You’ll notice the difference if you’re planning long outdoor outings.
The shorter sunshine is balanced by cooler temps, making midday more comfortable for walking tours or open-air markets.
You still have enough daylight for most things, but evenings come earlier than in summer.
If you want to soak up the most sun, aim for late mornings through mid-afternoons. Those hours usually bring the clearest skies, while early mornings and late afternoons are more likely to be cloudy.
Wind Conditions During Winter
In winter, winds become a bigger part of Port Louis’s climate. They change how cool the air feels, affect comfort outdoors, and matter for things like sailing or beach visits.
Typical Wind Speeds
You’ll notice steady winds in winter, with average speeds from 17 km/h to 24 km/h. July often brings the strongest winds, sometimes topping 23 km/h, making it the breeziest month.
These winds cool things down, so even when it’s 23–25°C (74–77°F), the moving air makes it feel fresher, especially near the coast or in the shade.
Gusts happen too, sometimes going over 30 km/h. They’re not extreme, but they can make walking or biking less comfortable in open areas.
For water sports like windsurfing or kitesurfing, this steady wind is a plus, giving reliable conditions for experienced folks.
On calmer days, wind drops closer to 15–17 km/h, but there’s still a steady flow. The mix of breezy and calm spells keeps the city’s winter climate comfortable, without long stretches of still, humid air.
Prevailing Wind Directions
In winter, winds in Port Louis mainly come from the southeast trade winds. These dominate much of the island and bring a steady flow across the capital.
Because of the city’s spot by the water, you really feel these winds along the waterfront and open streets.
The southeast breeze usually carries cooler, drier air compared to the wetter months. This helps cut down on humidity and makes outdoor time more pleasant.
If winds shift a bit east or south, they can funnel through valleys and city streets, creating stronger gusts in some places. Inland areas might feel less breeze, while the coast gets more consistent airflow.
For travelers, this pattern is pretty predictable. If you’re heading to the beach or an outdoor market, expect a steady southeast breeze shaping the daily weather in Port Louis during winter.
Sea Water Temperatures in Winter
During the winter months in Port Louis, the sea stays warm enough for swimming. The air cools a bit compared to summer, but water temperatures remain stable and comfortable.
Average Water Temperature
From June to August, the sea in Port Louis averages between 23.5°C (74°F) and 24.5°C (76°F). That’s cooler than the summer peak of about 28°C (82°F), but still pleasant for most people.
The lowest point usually comes in August, when water temperatures dip close to 23°C (73–74°F). That’s the coolest it gets, but it’s not cold by tropical standards.
Compared to many other places, these winter sea temperatures are mild. You’ll find consistent warmth without big daily swings, which is typical for the Indian Ocean around Mauritius.
Suitability for Swimming and Water Activities
You can swim in Port Louis during winter without much trouble, since the water usually stays around 23–25°C (73–77°F). Sure, it feels a bit cooler than in summer, but most people get used to it pretty fast.
If you hit the water in the middle of the day, you’ll probably find the air temperature makes the swim even more comfortable.
When it comes to snorkeling or diving, winter actually brings better visibility. Less rainfall and calmer seas help a lot, so exploring reefs and spotting marine life gets easier.
People still go paddleboarding, kayaking, and sailing all season. The cooler water can be a nice break after soaking up the sun, and honestly, it might make those activities feel more fun than exhausting.
If you’re someone who likes warmer water, you might want to plan your trip for late May or early September. That’s when the sea starts warming up again.