Sea temperature in Seychelles
Live water temperatures and swimming conditions across 4 beaches on the Seychelles coast.
Best time to swim in Seychelles
The sea in Seychelles peaks in February, when the water averages around 25°C.
The main swimming season runs from January – December, when surface temperatures stay comfortable for extended sessions.
On average, 12 months a year sit above 20°C — the threshold most swimmers describe as pleasant without a wetsuit.
The coldest month is typically July at around 20°C, when cold-water swimmers dominate the coast.
Seychelles sits in the Southern Hemisphere, so the warmest sea coincides with the December–February summer and the coolest with July–August.
Seychelles sea temperature history
Long-term climatology for Seychelles shows an annual mean sea temperature of 22°C, ranging from 20°C in winter to 25°C at the summer peak.
The seasonal swing is roughly 5°C between the coldest and warmest month — a useful yardstick when comparing years or checking whether the current sea is running above or below average.
Recent decades have trended slightly warmer at Seychelles, in line with regional sea-surface temperature records for the wider basin.
Monthly averages below are drawn from multi-decadal climatology and are updated as new observations arrive.
Values are area averages; individual beaches vary by exposure and depth.
Seychelles sea temperature: frequently asked questions
What is the warmest month to swim in Seychelles?
February is the warmest month in Seychelles, when the sea averages about 25°C. Late-season warmth often persists a few weeks after peak.
When is the sea coldest in Seychelles?
The coldest month in Seychelles is typically July, when the water averages around 20°C. Cold-water swimmers and surfers dominate this period.
When can you swim in Seychelles without a wetsuit?
The main swimming season in Seychelles runs from January – December — about 12 months a year when the sea sits above 20°C, the level most swimmers describe as pleasant without a wetsuit.
Do I need a wetsuit in Seychelles?
Outside peak summer the water in Seychelles drops toward 20°C, so a 3/2mm shorty or full wetsuit makes long swims much more comfortable. In peak months most swimmers go without.
What is the average sea temperature in Seychelles?
The long-term annual mean sea temperature in Seychelles is about 22°C, based on multi-decadal climatology of the surrounding waters.
How do I check the current sea temperature in Seychelles?
The live reading at the top of this page shows the current sea temperature in Seychelles, updated hourly from marine buoy and satellite data. The 7-day forecast covers water, air, waves, wind and UV for the week ahead.
Seychelles sea temperature by month
Average sea temperatures around Seychelles for every month of the year, based on long-term Open-Meteo marine climatology.
| Month | Average sea | Swimming comfort |
|---|---|---|
| January | 24.0°C | Warm swimming |
| February ⭐ | 25.0°C | Warm swimming |
| March | 24.0°C | Warm swimming |
| April | 23.0°C | Pleasant swimming |
| May | 22.0°C | Pleasant swimming |
| June | 21.0°C | Pleasant swimming |
| July | 20.0°C | Swimmable, refreshing |
| August | 20.0°C | Swimmable, refreshing |
| September | 21.0°C | Pleasant swimming |
| October | 22.0°C | Pleasant swimming |
| November | 23.0°C | Pleasant swimming |
| December | 24.0°C | Warm swimming |
Monthly figures are modelled climatology averages, not live readings. How accurate is our data?
Warmest beaches in Seychelles right now
| Beach | Region | Sea | Swim score |
|---|---|---|---|
| Anse Lazio | Praslin | 21.6°C | Excellent |
| Anse Source d'Argent | La Digue | 21.5°C | Excellent |
| Beau Vallon | Mahe | 20.8°C | Excellent |
| Anse Intendance | Mahé | 20.7°C | Excellent |
Sea temperature in Seychelles — FAQ
How warm is the sea in Seychelles in September?
The sea off Seychelles averages about 21.0°C in September, based on long-term monthly averages for this coast.
When is the best time to swim in Seychelles?
Seychelles is warmest in February (around 25.0°C) and coldest in July (around 20.0°C). There are typically 8 months a year when the water sits above 22°C.
What is the average yearly sea temperature in Seychelles?
Across all twelve months, the sea in Seychelles averages about 22.4°C.
Do you need a wetsuit to swim in Seychelles?
In peak season (around February, ~25.0°C) most swimmers are comfortable without a wetsuit. Outside summer, when the water drops toward 20.0°C, a 3/2mm to 5/4mm wetsuit is recommended.