Fall Weather in Seychelles Seychelles

Daily high temperatures are around 87°F, rarely falling below 83°F or exceeding 90°F. The highest daily average high temperature is 88°F on April 9.

Daily low temperatures are around 79°F, rarely falling below 76°F or exceeding 81°F. The highest daily average low temperature is 79°F on May 12.

For reference, on April 7, the hottest day of the year, temperatures in Seychelles typically range from 79°F to 88°F, while on August 1, the coldest day of the year, they range from 77°F to 82°F.

The figure below shows you a compact characterization of the hourly average fall temperatures. The horizontal axis is the day, the vertical axis is the hour of the day, and the color is the average temperature for that hour and day.

© OpenStreetMap contributors

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The fall in Seychelles experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 62% throughout the season. The lowest chance of overcast or mostly cloudy conditions is 59% on April 8.

The clearest day of the fall is April 8, with clear, mostly clear, or partly cloudy conditions 41% of the time.

For reference, on January 11, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 73%, while on October 2, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 49%.

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Seychelles, the chance of a wet day over the course of the fall is very rapidly decreasing, starting the season at 36% and ending it at 25%.

For reference, the year's highest daily chance of a wet day is 58% on December 30, and its lowest chance is 10% on July 27.

Rainfall

To show variation within the season and not just the monthly totals, we show the rainfall accumulated over a sliding 31-day period centered around each day.

The average sliding 31-day rainfall during the fall in Seychelles is rapidly decreasing, starting the season at 3.3 inches, when it rarely exceeds 6.2 inches or falls below 0.8 inches, and ending the season at 2.2 inches, when it rarely exceeds 5.5 inches or falls below 0.2 inches.

Over the course of the fall in Seychelles, the length of the day is gradually decreasing. From the start to the end of the season, the length of the day decreases by 19 minutes, implying an average daily decrease of 13 seconds, and weekly decrease of 1 minute, 28 seconds.

The shortest day of the fall is May 31, with 11 hours, 52 minutes of daylight and the longest day is March 1, with 12 hours, 11 minutes of daylight.

The latest sunrise of the fall in Seychelles is 6:23 AM on March 1 and the earliest sunrise is 8 minutes earlier at 6:15 AM on May 3.

The latest sunset is 6:35 PM on March 1 and the earliest sunset is 25 minutes earlier at 6:10 PM on May 21.

Daylight saving time is not observed in Seychelles during 2025.

For reference, on December 21, the longest day of the year, the Sun rises at 6:03 AM and sets 12 hours, 23 minutes later, at 6:27 PM, while on June 21, the shortest day of the year, it rises at 6:23 AM and sets 11 hours, 51 minutes later, at 6:14 PM.

The figure below presents a compact representation of the sun's elevation (the angle of the sun above the horizon) and azimuth (its compass bearing) for every hour of every day in the reporting period. The horizontal axis is the day of the year and the vertical axis is the hour of the day. For a given day and hour of that day, the background color indicates the azimuth of the sun at that moment. The black isolines are contours of constant solar elevation.

The figure below presents a compact representation of key lunar data for the fall of 2025. The horizontal axis is the day, the vertical axis is the hour of the day, and the colored areas indicate when the moon is above the horizon. The vertical gray bars (new Moons) and blue bars (full Moons) indicate key Moon phases. The label associated with each bar indicates the date and time that the phase is obtained, and the companion time labels indicate the rise and set times of the Moon for the nearest time interval in which the moon is above the horizon.

We base the humidity comfort level on the dew point, as it determines whether perspiration will evaporate from the skin, thereby cooling the body. Lower dew points feel drier and higher dew points feel more humid. Unlike temperature, which typically varies significantly between night and day, dew point tends to change more slowly, so while the temperature may drop at night, a muggy day is typically followed by a muggy night.

The chance that a given day will be muggy in Seychelles is essentially constant during the fall, remaining around 100% throughout.

For reference, on January 1, the muggiest day of the year, there are muggy conditions 100% of the time, while on August 13, the least muggy day of the year, there are muggy conditions 100% of the time.

This section discusses the wide-area hourly average wind vector (speed and direction) at 10 meters above the ground. The wind experienced at any given location is highly dependent on local topography and other factors, and instantaneous wind speed and direction vary more widely than hourly averages.

The average hourly wind speed in Seychelles is very rapidly increasing during the fall, increasing from 8.7 miles per hour to 14.1 miles per hour over the course of the season.

For reference, on August 18, the windiest day of the year, the daily average wind speed is 17.0 miles per hour, while on April 7, the calmest day of the year, the daily average wind speed is 7.0 miles per hour.

The lowest daily average wind speed during the fall is 7.0 miles per hour on April 7.

The wind direction in Seychelles during the fall is predominantly out of the north from March 1 to March 26, the west from March 26 to April 6, the east from April 6 to May 6, and the south from May 6 to May 31.

Seychelles is located near a large body of water (e.g., ocean, sea, or large lake). This section reports on the wide-area average surface temperature of that water.

The average surface water temperature in Seychelles is essentially constant during the fall, remaining within 1°F of 84°F throughout.

The highest average surface water temperature during the fall is 85°F on April 15.

Definitions of the growing season vary throughout the world, but for the purposes of this report, we define it as the longest continuous period of non-freezing temperatures (≥ 32°F) in the year (the calendar year in the Northern Hemisphere, or from July 1 until June 30 in the Southern Hemisphere).

Temperatures in Seychelles are sufficiently warm year round that it is not entirely meaningful to discuss the growing season in these terms. We nevertheless include the chart below as an illustration of the distribution of temperatures experienced throughout the year.

Growing degree days are a measure of yearly heat accumulation used to predict plant and animal development, and defined as the integral of warmth above a base temperature, discarding any excess above a maximum temperature. In this report, we use a base of 50°F and a cap of 86°F.

The average accumulated growing degree days in Seychelles are very rapidly increasing during the fall, increasing by 2,945°F, from 7,438°F to 10,382°F, over the course of the season.

This section discusses the total daily incident shortwave solar energy reaching the surface of the ground over a wide area, taking full account of seasonal variations in the length of the day, the elevation of the Sun above the horizon, and absorption by clouds and other atmospheric constituents. Shortwave radiation includes visible light and ultraviolet radiation.

The average daily incident shortwave solar energy in Seychelles is gradually decreasing during the fall, falling by 0.9 kWh, from 5.9 kWh to 5.1 kWh, over the course of the season.

The highest average daily incident shortwave solar energy during the fall is 6.0 kWh on March 12.

For the purposes of this report, the geographical coordinates of Seychelles are -4.583 deg latitude, 55.667 deg longitude, and 7 ft elevation.

The topography within 2 miles of Seychelles is essentially flat, with a maximum elevation change of 0 feet and an average elevation above sea level of 0 feet. Within 10 miles is essentially flat (125 feet). Within 50 miles contains only modest variations in elevation (2,989 feet).

The area within 2 miles of Seychelles is covered by water (100%), within 10 miles by water (100%), and within 50 miles by water (99%).